1. Scope of application

1.1 this manual is applicable to the installation of electrostatic precipitator. Technical transformation and overhaul can also be implemented by reference.

1.2 if the special provisions of the same type of electrostatic precipitator and some products are inconsistent with this manual, the special provisions shall be followed.

1.3 referenced standards

JB / t5910-1997 electric precipitator

JB / t8536-1997 technical conditions for mechanical installation of electrostatic precipitator

Jb5908-1991 code for sampling inspection, packaging, transportation and storage of main parts of electrostatic precipitator

JB / t5906-1997 anode plate of electrostatic precipitator

JB／T5909. Porcelain insulator for electrostatic precipitator

2. Equipment storage and unpacking acceptance

2.1 after the equipment arrives at the site, it shall be kept according to the following requirements.

2.1.1 the stacking yard shall be reasonably arranged, with a stable foundation, which is convenient for transportation and operation, and flood control and waterlogging prevention facilities shall be made.

2.1.2 the stacking of products shall meet the requirements of pre assembly and installation process flow, and avoid repeated reshipment to prevent deformation.

2.1.3 the packaging, transportation, marking and storage of electrostatic precipitator parts shall comply with the provisions of jb5908-1991.

2.2 equipment unpacking acceptance

2.2.1 equipment unpacking, counting and acceptance shall be jointly attended by the manufacturer, user and construction unit.

2.2.2 acceptance conditions

a. The supply list, packing list and other technical documents are complete;

b. The model, specification and quantity on the equipment nameplate are consistent with the engineering design;

c. Check the product quality. In case of deformation and size change due to transportation, loading and unloading and storage, it shall be corrected, and those that cannot be repaired shall be scrapped and replaced;

d. The equipment acceptance standard is based on the manufacturer's design drawings, relevant technical documents and JB / t59lo-1997.

3. Preparation before construction

3.1 the installation unit shall be familiar with equipment structure, performance, relevant design drawings and technical documents, prepare construction organization design documents and construction quality card, and strictly make quality inspection records during construction.

3.2 according to the requirements of construction organization design, carry out site leveling, platform laying, hoisting machinery and facilities, allocation of special machines and tools, etc.

3.3 the voltage withstand test of electric porcelain products shall comply with JB / t5909 L-4 regulations.

3.4 the manufacturer shall make technical disclosure of equipment and send personnel to participate in technical guidance during construction if necessary.

4. Installation of electrostatic precipitator body

4.1 installation sequence of electrostatic precipitator: as the electrostatic precipitator is a large outdoor equipment, the conditions and conditions of the installation site are different, and the conditions of personnel and machines and tools of the construction unit are also different, so each construction unit can carry out construction selectively according to the following installation sequence of common electrostatic precipitators provided by us. The support of electrostatic precipitator has two forms: steel structure and reinforced concrete. The insulation of ash hopper has two forms: steam heating and electric heating. The installation shall be subject to the requirements of the provided design drawings,

4.2 foundation acceptance: including the acceptance of embedded bolts of concrete pillars and steel supports, all shall meet the requirements of relevant design drawings. Allowable deviation of Foundation (see Table 1 below).

表1

name	Length (m)	Deviation (mm)
Column spacing	≤10        >10	<±3        <±5
diagonal	≤20        >20	<±6        <±8
elevation		≤±3

4.3 steel support

4.3.1 draw the cross center line and contour line of the support preparation plane as the measurement benchmark.

4.3.2 the allowable deviation of horizontal elevation of each bearing surface of steel support is ≤± 3mm, and the allowable deviation of perpendicularity is 5mm.

4.4 support

4.4.1 draw cross center lines on the supporting top plate and bottom plate respectively as the measurement benchmark.

4.4.2 the support shall be seated in strict accordance with the requirements of the drawing, and pay attention to the displacement direction of one-way and two-way support. Make the temporary positioning of the supporting roof, and the temporary fixation shall be reliable. The temporary positioning shall be removed before putting into operation.

4.4.3 the plane elevation deviation of each support is ≤± 3.

4.5 bottom beam and ash hopper

4.5.1 draw the vertical and horizontal center lines of all bottom beams, and make temporary support at the hoisting position. Anti deformation measures shall be taken during welding. After the bottom beam is installed, pads are allowed to be added at the contact with the support, and the gap is less than 1mm.

4.5.2 the diagonal deviation of the bottom beam shall comply with the provisions in Figure 1, and the elevation deviation of each column support point shall be ≤± 3mm.

1 electric field	2 electric field	3 electric field	4 electric field
±8mm	±10mm	±15mm	±18mm

4.5.3 the inner wall of the ash hopper shall be sealed and welded.

4.5.4 the anode plates such as the upper wind shield of the ash hopper shall be installed after adjustment. The gap between the lower plane of the vibrating rod at the lower part of the anode row and the upper wind shield shall be constructed in strict accordance with the drawing to ensure the free thermal expansion of the polar plate. The gap of the upper wind shield of the ash hopper can be corrected on site.

4.6 walkway in dust

4.6.1 when installing the walkway in the dust, pay attention that the expansion end shall not be welded dead. The parts used for pole row positioning on the walkway in the dust shall be welded after the anode row is installed and adjusted.

4.7 shell, inner roof and ladder

4.7.1 before installation, measure the actual length of each column, prepare the base plate with corresponding thickness, and draw the center line and contour line of each measurement plane.

4.7.2 the allowable deviation of column perpendicularity is ± 5mm, the allowable deviation of column elevation is ± 3mm, and the dimension between columns is ± 5mm.

4.7.3 for the bottom plane of the inner top girder, downward bending is not allowed, but the allowable deviation of upward deflection is less than 5mm.

4.7.4 after the top of the shell is installed, install some ladders and platforms to facilitate the next installation. The walkway installation must be firm and reliable, and pay attention to thermal expansion.

4.8 cathode hanging and large frame

4.8.1 the insulator shall be subject to withstand voltage test before installation, which shall be carried out in accordance with relevant standards and carefully installed to prevent breakage. The allowable height difference of the upper plane of the same group of pillars shall be ± 1mm, and the center deviation of the suspender from the dust cover and porcelain cover shall be ± 3mm.

4.8.2 cathode frame installation, as shown in Figure 2, can be assembled in the electric field or combined on the ground. The upper, middle and lower small frames are generally combined in the electric field. Requirements after frame combination:

a. The center deviation of two rectangular tubes of the same small frame is ≤± 3mm;

b. The allowable deviation of straightness of vertical beam is 3mm.

4.9 anode part

4.9.1 marking and installation of anode suspension frame;

4.9.2 the distance deviation between the suspension frame and the upper small frame is ± 5mm;

4.9.3 after the installation of the cathode cage frame, the position of the pole plate and the single pole plate shall be corrected, and the size and shape and position tolerance shall comply with the provisions of JB / t5906-1997. The correction frame is as shown in Figure 3. When placing the lifting appliance (Figure 4) into the auxiliary guide frame (Figure 5), each fixed anode plate clip shall be placed, and generally 5-6 pieces shall be hoisted;

4.9.4 the lifting method for the upper part of the auxiliary guide frame and anode plate is shown in Figure 6.

4.9.5 the anode plate shall be inserted between the anode suspension frame and the cathode small frame, and then corrected. The deviation of the distance between different poles shall be ± 10mm.

4.9.6 when the lower part of the anode plate of the electrostatic precipitator is connected and fastened to the bottom with concave convex sleeve, the fastening bolts must be tightened, and the tightening torque is required to be 160n · M

4.10 cathode wire installation

4.10.1 for the installation of tubular prick wire, check the cathode wire, install it in strict accordance with the requirements of the drawing, and do not install it reversely or upside down. The tightening torque at the round hole and waist hole shall be carried out according to the requirements of the drawing, so as to ensure the free thermal expansion of the polar wire without shaking, and then weld the bolt. Deviation between anode and cathode (see Table 2):

Plate length ≤ 7M	Distance between cathode and anode ≤ 5mm
Plate length > 7M	Distance between cathode and anode ≤ 10mm

4.11 installation of anode and cathode rapping system

4.ll. L install according to the requirements of the drawing. The rapping hammer can be installed only after the coaxiality of the rapping shaft is ensured to be less than 3mm. The horizontal center deviation between the center of each rapping hammer and the cold design center point of the impact anvil is ± 3mm, and the vertical center deviation is ± 3mm.

4.11.2 all parts welded with the shaft shall be welded with t506 or t507.

4.11.3 identify the rotation direction, manually handle the rapping shaft and check whether it is normal. Turn on the power supply in the specified direction. Check the operation to ensure normal operation.

4.12 installation of inlet and outlet heads and distribution plates

4.12.1 hoist the inlet and outlet heads as a whole after assembly according to the hoisting capacity.

4.12.2 the distribution board shall be in strict accordance with the drawing.

4.13 pay attention to thermal expansion when installing the outer roof.

4.14 installation of ash discharge mechanism, manhole door and other maintenance. Pay attention to flexible opening and sealing during the installation of manhole door.

4.15 thermal insulation and coating

4.15.1 the thermal insulation mechanism shall be determined according to the requirements of the manufacturer and the actual situation of the user.

4.15.2 the coating shall comply with JB ／ ZQ4000 10 regulations.

4.16 the protective plate shall be installed firmly and have a beautiful appearance.

5. Problems needing attention in installation

5.1 when formulating the installation scheme, anti welding deformation measures shall be taken.

5.2 missing welding and false welding are strictly prohibited, especially the welding of internals.

5.3 strictly ensure the sealing welding of the shell, and pay attention to the repair welding of missing welding points.

5.4 the trimming of the distance between different poles is very important to ensure the dust removal efficiency and other performances. During the installation of the anode and cathode, careful inspection and adjustment shall be made to ensure the deviation of the distance between different poles.

6. End of installation check

6.1 remove all temporary facilities and scaffolds and repair welding.

6.2 the inside of the electrostatic precipitator shall be completely cleared, and no tools and sundries are allowed to be left, and the manhole door shall be strictly sealed.

6.3 insulator products must be clean.

6.4 the oil level inspection of reducer shall comply with relevant standards.

6.5 the shell of electrostatic precipitator and auxiliary equipment shall be well grounded, and the grounding bolts and nuts shall be connected and grounded according to the requirements of electrical construction specifications.

6.6 remove the temporary positioning of the support to the specified position.

6.7 check the cathode insulation resistance, which shall comply with JB / t5909 1-4 provisions.

7. Installation and commissioning contents

7. L the acceptance of electrostatic precipitator shall comply with JB / t5910-1997.

7.2 see the appendix electrostatic precipitator commissioning outline for electrostatic precipitator commissioning.

7.3 the shell sealing test shall be conducted in the form of kerosene penetration.

8. Appendix: electrostatic precipitator commissioning outline.

8.1 commissioning contents

In order to achieve the expected effect, the electrostatic precipitator must have good installation quality, and the commissioning after installation is an indispensable means to inspect and ensure the installation quality. Its work content often includes:

a. Inspection and test of equipment components of electrostatic precipitator

b. Sealing test of electrostatic precipitator

c. Inspection and adjustment of electrostatic precipitator after installation

d. Inspection and commissioning of low voltage control circuit of electrostatic precipitator

e. Inspection and commissioning of high voltage control circuit of electrostatic precipitator

f. Commissioning of anode and cathode rapping of electrostatic precipitator, distribution plate rapping (if any) and transmission parts of ash discharge mechanism

g. Power on test of electric heater of electrostatic precipitator

h. Load test of cold smokeless electric field of electrostatic precipitator

i. Whole machine test of hot load of electrostatic precipitator

Note: as for the air distribution test, since the field test results are better than the model test results, it is not necessary to conduct the air distribution adjustment test on site.

8.2 preparations and safety precautions before commissioning.

8.2.1 the commissioning of electrostatic precipitator shall be carried out by the installation unit, with the participation of relevant personnel such as representatives of the construction unit, manufacturer and user unit. The General Commander and principals of each commissioning discipline shall be established to clarify the commissioning operation system (organization, command, work volume and personnel), formulate the commissioning engineering table, coordinate and solve problems in time, and carefully record the problems, solutions and various data during commissioning, After commissioning, write the conclusion of commissioning report and send it to relevant departments and units.

8.2.2 the commissioning personnel shall carefully read the equipment manual and relevant technical data, be familiar with the equipment and system design, and carry out according to the items, methods, steps and requirements of the commissioning outline.

8.2.3 prepare consumable materials, greases, instruments and tools required in commissioning. The main tools and instruments are as follows:

a. Electrostatic voltmeter 100kV 1 set

b. Digital multimeter l block

c. Clamp on ammeter 1-5a l block

d. One megger for 2500V and one megger for 500V

e. Voltmeter 600V, grade O.5, 1 piece

f. A set of common electrician debugging tools

g. Incandescent bulb dummy load 220V ／ 100W × 2 sets (self-made)

h. Insulation rod 10kV three control, 1 set (for discharge)

i. Several signs and bands (self provided)

j. Several plastic multi-core soft wires for test wiring (self provided)

k. High energy interphone l pair (for high-rise layout)

8.2.4 composition of dispatching project personnel:

Chief commander: 1

Operators: 2

Inspectors and surveyors: 2-3

Adjuster: 2-3 mechanical

Electrical: 2-3

Liaison: 1-2

Total: 10-15

8.2.5 confirmation of several items

a. Public facilities (water, compressed air, electricity, etc.);

b. Confirmation of relevant equipment such as power supply equipment and fire extinguishing equipment;

e. Confirmation of insulation resistance of main circuit;

d. Check the procedure of control circuit and get confirmation.

8.2.6 the records of inspection and test results shall be valid only if they are jointly signed by the manufacturer, installation company and user. After commissioning, a summary report shall be written, signed and archived by the three parties.

8.2.7 safety precautions shall comply with the provisions of jb6407 standard.

8.3 inspection and test of equipment elements of electrostatic precipitator.

8.3.1 check the main insulating parts of high-voltage network, such as high-voltage disconnector, cathode suspension insulating porcelain bushing, cathode insulating porcelain shaft, through wall bushing, etc. all shall pass the voltage withstand test: measure the high-voltage network with 2500 megohmmeter, and its insulation value shall be more than 1000m Ω.

8.3.2 before assembly and commissioning of high-voltage silicon rectifier transformer, check the gas relay of rectifier transformer and exhaust.

8.3.3 check that the high-voltage disconnector shall operate flexibly and accurately, and the equipment with auxiliary contact shall have sensitive contact opening and closing.

8.3.4 check that there is no oil leakage at the cable head.

8.3.5 before the commissioning of high-voltage silicon rectifier transformer, the items to be tested shall be carried out according to the instructions of the power supply factory.

8.3.6 if the high-voltage output of silicon rectifier transformer is transmitted by high-voltage power cable, the following tests shall be conducted on the high-voltage cable:

a. High voltage cable oil strength test, one-time breakdown voltage not less than 35kV standard oil cup;

b. DC leakage test of high voltage cable.

c. Use 2500V megger to measure the cable insulation resistance before and after the test;

d. The DC withstand voltage test voltage of the special DC cable for electrostatic precipitator is 2UE (twice the rated voltage) for 10 minutes;

If other specifications of power cables are used as substitutes, the withstand voltage standard and duration shall be in accordance with the DC withstand voltage test standard of power cables in the national standard code for construction and acceptance of electrical equipment installation engineering (gbj232-82) (Part 17 electrical handover test standards).

During the test: it can be divided into 0.25, 0.5, 0.75 and 1 times of the test voltage, step up the voltage section by section, stay for one minute in each section, read the leakage current value, and eliminate the influence of stray current during measurement.

8.3.7 if one of the following occurs in the cable DC leakage current test, the cable insulation may have defects, and the defective parts shall be found out and treated:

a. The leakage current is very unstable;

b. The leakage current rises sharply with the increase of test voltage;

c. The leakage current increases with time.

8.3.8 the test of high voltage silicon rectifier transformer control cabinet shall be carried out according to the instructions of the power supply factory.

8.3.9 various porcelain parts installed in electrostatic precipitator, including wall bushing, cathode insulating porcelain bushing, rapping porcelain shaft, etc. Before installation, the appearance shall be inspected according to the electric porcelain standard, and the porcelain parts shall be intact and free of cracks.

8.3.10 insulation resistance measurement and AC withstand voltage test shall be conducted for various porcelain parts before installation, which shall comply with the manufacturer's regulations. (normal temperature, withstand voltage: 100kV, one minute)

8.3.11 the motor on the rapping damper shall be overhauled before installation, and the bearing shall be lubricated as required.

8.3.12 the model and parameters on the nameplate of electric heater shall be consistent with the design requirements. Before installation, the appearance shall be intact. Measure the insulation resistance with a 500V megger, and the resistance value shall be greater than 50m Ω. If the resistance value is less than 50m Ω, it can be dried by low-voltage electricity.

8.4 sealing test of electrostatic precipitator. After the installation of the dust collector, the tightness shall be checked before laying the insulation layer. Kerosene penetration test is generally used.

8.5 inspection and adjustment of electrostatic precipitator after installation.

8.5.1 inspection and adjustment of center distance between anode and cathode:

a. In addition to 100% correction on the ground one by one, the anode plate shall adhere to 100% re inspection and re calibration;

b. The quality of cathode wires shall be checked one by one. If defects are found, they shall be scrapped and renewed;

c. Check all channels, and check before and after each channel;

d. In the channel, the heteropolar distance deviation shall meet the requirements of jb5910 standard: the limit deviation of heteropolar distance is ± 5mm when the anode plate height h ≤ 7m and ± 10mm when H > 7m;

e. During inspection and adjustment, the distance from the outer wall of each horizontal square tube of the cathode small frame to the outside of the flange of the anode plate windbreak shall be taken as the detection point in the height and horizontal direction of the whole channel;

f. Check 5-9 points on one side of each channel in the height direction, that is, one point for each horizontal support pipe of the cathode small frame, use a special "t" gauge to detect and make records. Unqualified parts shall be readjusted or reworked;

g. When adjusting, be careful and move slowly, and do not exert too much force on the anode plate;

h. It is forbidden to use heating method for correction.

8.5.2 remove the sharp corners and burrs of the cathode and anode parts, and carefully check the interior of the shell electric field. Except for the cathode and anode rows, all parts with high and low potential whose spacing is less than the plate line heteropolar distance must be treated.

8.5.3 the bolts of anode plate row, cathode large frame, small frame, cathode and anode rapping parts shall be intact and non rotating welding shall be carried out.

8.5.4 the contact position between the cathode and anode hammer heads and the anvil shall meet the requirements, and the shaft and hammer shall rotate flexibly and reliably.

8.5.5 remove foreign matters in the electric field.

8.5.6 check that the operation of damper motor, rapping reduction motor and ash discharge motor is correct and flexible, and all lubricating parts are clean and oiled.

8.5.7 the regulating valve, baffle, induced draft fan, ash discharge device, roof panel and manhole connected to the flue are well sealed.

8.5.8 the welds of all parts shall be firm and reliable without wrong welding or missing welding, and the sealing performance shall be good.

8.5.9 all porcelain sleeves and shafts shall be clean and dry.

8.5. The grounding resistance of l0 body shall be less than 2 ohms, and the grounding resistance of electrical equipment shall be less than o.5-1 ohms.

8.5.11 measure the insulation resistance of high-voltage network with 2500 V megohmmeter, which shall be greater than 1000 megohm.

8.5.12 the wiring of the shell of the de sitter and the positive cable of the high-voltage rectifier transformer shall be intact and fastened.

8.5.13 the operating mechanism of high-voltage disconnector shall be flexible and accurate.

8.5.14 use a 500 volt megohmmeter to check the insulation of rapping motor, damper motor, ash unloading motor and their cables, and the insulation resistance shall not be less than 0.5 megohm.

8.5.15 check whether the wiring of each part is correct according to the drawings.

8.6 inspection and commissioning of low voltage control circuit of electrostatic precipitator.

8.6.1 after the electrical system of electrostatic precipitator is checked, it can be powered on to check the transmission test of each system and the no-load test run of the equipment.

8.6.2 power on inspection of low-voltage operation control equipment mainly includes: alarm system test, rapping circuit inspection, ash removal circuit inspection, heating and temperature detection circuit inspection, etc.

8.6.3 before power on, disconnect the wiring between each cabinet (set) and the low-voltage components of the electrostatic precipitator from the terminal block, and then conduct the power on joint inspection of the low-voltage control equipment. After power on, start the power switch of each cabinet (set) and the power voltmeter on each cabinet (set) shall have instructions.

8.6.4 during the test of manual and automatic start-up alarm system, its instantaneous, delayed sound and light signals shall act correctly and be relieved reliably.

8.6.5 the methods and requirements for the inspection of rapping circuit are as follows:

a. Trial operation: disconnect the power wiring of the motor from the panel, switch on and send power. Manual mode: open and close three times, the contactor is connected and disconnected correctly, and the signal light plate shall meet the design requirements. Automatic time control mode: set one rapping cycle and three sequence of cyclic action. The rapping cycle is correct, and the opening and closing of contactor and signal light word shall be correct. And the time control of field test is adjustable.

Program control mode: start three programs of program work, and its cycle and logic execution shall be correct and not disordered. And the field test cycle and logic execution are adjustable.

After the test, power off and restore the motor wiring;

b. No load operation: untie the coupling and switch on the power supply;

Manual mode: after starting, check that the rotation direction of the motor should be consistent with the requirements of the control unit. Open and close for three times, and measure the starting current value, no-load current value and phase-to-phase unbalanced current value.

The automatic time control force type and program control mode work three sequences and programs respectively, and their cycle coordination and logic execution shall be correct.

After the correctness test, power off and restore the coupling;

c. Cold test run operation under rated load: closing and power transmission.

In manual mode, record the starting current value during test run, and measure the three-phase current value and unbalanced current value. Approve the setting value of thermal element, and the opening and closing for three times shall be normal.

Check the contact points hit by the hammer on the rapping anvil, and the reserved values up, down, left and right meet the design requirements. It can rotate flexibly without clamping or dropping the hammer, and there is no empty hammer.

Automatic time control force type. The design program given by the manufacturer shall be tested for three cycles, and the program and timing are correct and not disordered.

After the locomotive and electrical inspection are qualified, the continuous rapping test run shall not be less than 8 hours and shall be normal.

8.6.6 the methods and requirements for inspection of ash unloading and conveying roads are as follows:

a. Trial operation: disconnect the power wiring of the motor from the lower end of the contactor and switch on the power supply.

Manual mode, opening and closing for three times, contactor, signal and optical word shall act correctly.

Automatic mode: manually simulate the ash level working condition for three times, and the interlocking shall be correct.

After the test is correct, power off and restore the motor wiring;

b. No load test run: release the mechanical load of ash removal, power on and test run the motor.

Manual mode: start the motor and determine the rotation direction. Measure the starting current and three-phase current of the motor. The installation unit shall be consistent with the signal indication.

Automatic mode: simulate startup and shutdown for three times, and the tag number and interlocking shall be correct. After the no-load test run is normal, power off and restore the mechanical load;

c. Commissioning operation of machinery with ash removal

Manual mode: measure the starting current value when starting, and check the current setting value of the thermal element with the three-phase current value.

Automatic mode: simulate the startup for three times and it shall operate normally. As for the hot ash level linkage test, it shall be debugged separately under the actual operating conditions in the future.

After the locomotive and electrical inspection are qualified, the continuous test run shall be 8 hours; It is required to rotate flexibly without jamming and leakage.

8.6.7 check the heating under current alarm and temperature detection circuit. The methods and requirements are as follows:

a. Manual operation: measure the current value 30 minutes after power transmission, check the setting value of thermal element, and ensure that the signal and installation unit are correct;

h. When the heating circuit is equipped with an under current alarm device, any electric heater in the circuit shall be cut off manually, and the under current alarm shall act correctly;

c. Temperature control mode: simulate opening and closing twice, the contactor and signal shall act correctly, and the temperature control range shall meet the design requirements. After power transmission and heating, the heating shall be stopped automatically when the temperature rises to the upper limit setting value, and the heating device shall be put into operation automatically when the temperature drops to the lower limit setting value.

8.6.8 low voltage control circuit commissioning shall be implemented in combination with the manufacturer's test instructions.

8.7 inspection and commissioning of high voltage control circuit of electrostatic precipitator.

8.7.1 operation test of control circuit of high voltage silicon rectifier transformer.

Under the condition of disconnecting the low-voltage side wiring of silicon rectifier transformer, conduct ground and remote opening and closing test, simulate gas, overcurrent, temperature limit protection, trip transmission, liquid level, temperature alarm, safety continuous tripping, air cooling interlocking and other test items, and the light, signal and sound shall be correct.

8.7.2 commissioning of high-voltage control circuit includes: pre setting of limit parameters of control plug-in and open-loop no-load commissioning device.

8.7.3 check the control circuit of high voltage silicon rectifier transformer before commissioning

a. Check whether the internal and external wiring is correct according to the schematic diagram of the device;

b. The inspection of unit parts and discrete components shall meet the requirements of relevant regulations;

c. Each adjustment button shall be in the starting position.

8.7.4 the commissioning of the control circuit of high-voltage silicon rectifier transformer shall be carried out according to the commissioning outline, procedures and requirements. Generally, it is divided into two steps: loop and closed loop.

8.7.5 open loop commissioning methods and requirements for control circuit of high voltage silicon rectifier transformer are as follows:

a. The Open-loop test can be carried out on the simulator or control cabinet, and the static parameter measurement of each link of the device control plug-in can be adjusted. When it is carried out on the control cabinet, all wiring of silicon rectifier transformer in the main circuit shall be disconnected, and two 220V and 100W incandescent bulbs shall be connected as false load;

b. The detailed experimental method shall be carried out according to the operation manual of the power supply factory.

8.7.6 the closed-loop commissioning methods and requirements of the control circuit of high-voltage silicon rectifier transformer shall be carried out in combination with the operation manual of the power plant.

8.8 adjusting parts of electrostatic precipitator cathode and anode rapping, distribution plate rapping (if any) and transmission parts of ash discharge mechanism.

8.8. objective

In order to ensure the safe operation of the electrostatic precipitator, the rapping device and ash discharge mechanism of the cathode line anode plate and air distribution plate must be separately debugged during installation and before the whole electrostatic precipitator is put into operation, so as to check the working condition of the rapping part.

8.8.2 preparation:

a. Before installing the transmission device, the installed rapping transmission shaft and rapping hammer must be comprehensively inspected.

b. Burr and welding spatter of all parts shall be removed;

c. Relevant installation dimensions shall meet the requirements of the drawing;

d. The rapping shaft shall be able to rotate by hand;

e. The anode rapping hammer shall be struck at ± 4mm from the center of the anvil of the impact rod, and the corner of the adjacent two rapping hammers shall be in accordance with the requirements of the drawing:

Check the oil level and oil plug of the reduction gearbox.

Check the sealing condition of the beating shaft.

All bolts and nuts shall be closely connected and fixed by welding.

f. The cathode rapping and needle wheel shall be consistent with each other correctly.

The insulating porcelain bushing shall be scrubbed and cleaned to remove sundries.

g. The air distribution rapping can be carried out according to the terms of anode rapping.

8.8.3 commissioning

8.8.3.1 anode rapping:

a. The anode rapping motor must run without load for two hours, check whether there is abnormal heating, rapping and noise, and eliminate them;

b. Conduct overall commissioning, check whether there is jamming and eliminate it;

c. Rotate according to the vibration direction during commissioning, and reverse rotation is not allowed;

d. Start the anode shafting. When the motor reaches full speed, stop it with the accident button. If the shafting does not turn around for one week, start it again according to the above method. After checking that there is no error, notify the electrical to switch on for continuous operation;

e. Test run for one hour as required, and conduct comprehensive inspection after shutdown. If no abnormality is found, the installation is considered to be qualified.

8.8.3.2 cathode rapping

The test run shall comply with A8 Article 3.1.

8.8.3.3 air distribution plate rapping

Refer to clause 8.8.3.1.

8.8.3.4 ash discharge mechanism

Refer to clause 8.8.3.1.

8.8.3.5 ending work

a. Disconnect all motor power supplies and close the ground switch;

b. The through hole of the rapping shaft must be kept tight;

c. Remove the sundries left during the test run.

8.8.3.6 safety measures

a. All motors must be operated by motor personnel;

b. Adjustment and maintenance are not allowed during startup;

c. Sufficient lighting shall be provided for internal inspection of electrostatic precipitator;

d. Prepare enough fire fighting supplies.

8.9 power on commissioning of electric heater of electrostatic precipitator.

8.9. L before installing the electric heater, check whether the model and parameters on the nameplate of the electric heater are consistent with the design requirements, and conduct voltage withstand test and insulation resistance delimitation. The AC withstand voltage test value is 2000V and the insulation resistance is 50 Ω.

8.9.2 if the interval between installation and use is long, shake to measure whether the insulation resistance meets the standard requirements before adding the rated voltage.

8.9.3 start the electric heater and check:

a. Whether there is open circuit;

b. Temperature rise rate;

c. Whether the temperature control range is accurate.

8.9.4 the test that the electric heating is automatically controlled by the thermostat must be carried out after the normal flue gas.

8.10 load commissioning of electrostatic precipitator in cold state and smokeless electric field.

8.10.1 the load test of cold and smokeless electric field (hereinafter referred to as cold air electric field) can be carried out only after the no-load performance commissioning of high-voltage thyristor rectifier equipment is qualified.

8.l0. 2. For the commissioning sequence of cold air electric field, the low-voltage operation control equipment (especially the heating circuit) shall be put into operation first, and then the high-voltage system shall be put into commissioning after passing the inspection.

8.10.3 before the commissioning of high-voltage silicon rectifier equipment with empty electric field load, the low-voltage operation control system shall meet the requirements;

a. The rapping system works normally, each electric field can be rapped according to the design procedure, and the rapping time and rapping cycle shall meet the setting value;

b. The ash conveying and unloading system can work normally, and the ash unloading time and ash unloading delay time shall meet the setting value;

c. All temperature measurement and display units have been debugged according to the system, and the temperature measurement display value is correct;

d. The actual temperature value on site is consistent with the temperature indication value at the corresponding point on the operation display cabinet (console).

8.10.4 step up commissioning of cold air field: no-load power on boost test (static air field boost commissioning) shall be carried out first, and then dynamic air field boost commissioning shall be carried out.

Note: (1) the no-load power on boost test refers to the boost commissioning of the air field when the body rapping system is not put into operation, the induced draft fan at the outlet of the electrostatic precipitator is not running, and the electric field is in a relatively static state.

(2) Dynamic air field boost test means that all high and low voltage equipment of electrostatic precipitator are put into operation when there is no flue gas.

a. Before boosting and commissioning of each electric field respectively, the heating system of insulator chamber shall be put into operation first. Open the manhole door of each insulator chamber, remove the moisture on the insulator chamber and insulator surface, and then reinstall the manhole door of insulator chamber. Close the high-voltage disconnector, and all parts shall be in place accurately. Input the electric field, turn on the oscilloscope, and focus on monitoring the current feedback signal waveform. Set the voltage measurement switch to "primary voltage", set the operation selection switch to "manual rise" position, and set the current limit on the regulator panel in the high voltage control cabinet to the limit position. Press the start button, the current and voltage should rise slowly. At this time, the hand should not leave the operation switch. Pay attention to the current feedback waveform measured by each meter and oscilloscope on the control cabinet. When the protection link fails, it will cause the damage of high-voltage electrical equipment. During normal voltage rise, each meter on the control cabinet panel shall have corresponding instructions, and the current feedback waveform shall be symmetrical double half wave. When the current rises to 50% of the rated current value, the current and voltage stop rising due to the setting effect of the current limit. At this time, the operation selection switch can be set to the (automatic) position, and the current limit can be adjusted gradually in the direction of small limit. If there is no flashover in the electric field, it can be adjusted to the rated output current value.

b. In the process of initial boosting, when the primary and secondary currents rise rapidly and the voltmeter basically has no indication, there is a short circuit in the secondary circuit. When there are only primary voltage and secondary voltage and the voltage rises rapidly, there is an open circuit in the secondary circuit. When the secondary voltage and current have certain indication and the primary current is greater than the rated value, the primary current is about 220V and the conduction angle is more than 95%, It means that a single thyristor is turned on or a group of high-voltage silicon stacks is broken down. In case of the above abnormal phenomena, the voltage shall be reduced and shut down quickly. After the cause is found out and the fault is eliminated, the power can be transmitted and boosted again;

c. When the air electric field is boosted, the secondary voltage is far lower than the rated value, and there is flashover in the high-voltage network or electric field. When there is no flashover in the high-voltage network and electric field, and the flashover control link of the high-voltage control system works, resulting in "false flashover", the tap of the high-voltage silicon rectifier transformer or reactor and the controller shall be adjusted accordingly until the "false flashover" phenomenon is eliminated;

d. The secondary voltage meter can be calibrated when the secondary voltage of the rectifier is 40 kV, and the secondary voltage meter can be used to calibrate the secondary voltage meter when the secondary voltage meter is not charged. At the same time, measure the DC voltage value of the feedback current signal with a multimeter. Since the current feedback sampling resistance is a determined value, the indication of the secondary ammeter can be corrected according to Ohm's law;

e. The tap adjustment of high voltage silicon rectifier transformer and reactor can be determined according to the current feedback waveform. The principle is: adjust the tap to make the current feedback signal waveform smooth and the conduction angle is, that is, the waveform is close to the ideal waveform.

8.10.5 no load energizing and boosting parallel power supply test: the capacity of high-voltage silicon rectifier transformer is selected according to the plate and line current density and voltage breakdown value of electrostatic precipitator under the condition of flue gas. Due to the large gas current density during the no-load energizing and boosting test, a single high-voltage silicon rectifier transformer often has the problem of uncertain power supply capacity to a single electric field, that is, it is locked after the secondary current reaches the rated value, The secondary voltage cannot rise to the electric field breakdown value. At this time, two high-voltage silicon rectifier transformers with the same capacity can be used to supply power to the same electric field in parallel. The key points are as follows:

a. Parallel power supply can only be carried out after a single silicon rectifier equipment is debugged on the same electric field respectively, and the power supply equipment and electric field are free of faults. When parallel power supply, two high-voltage silicon rectifier equipment supply power to the same electric field after the damping resistance is connected in parallel, which can be realized by switching two silicon rectifier equipment and one electric field on the connecting bus through high-voltage disconnector, It can also be realized by connecting the wires with the discharge spacing (more than 500mm from the ground). During operation, it should be started at the same time. The two power supply equipment can boost the voltage at the same time by using the action of "manual rise" and "stop" of the operation selection switch. When the sum of the synchronously rising currents of the two power supply equipment does not reach the rated value, it can continue to boost the voltage until the electric field flashover. At this time, the secondary current is the sum of the two power supply standby currents, The secondary voltage is the average value of the secondary voltage of two power supply equipment;

b. During no-load power on and boost commissioning, special personnel must be assigned to monitor whether the high-voltage silicon rectifier transformer is abnormal. When the high-voltage rectifier transformer is arranged on the top of the dust collector, due to the long primary feed cable, the input voltage at the primary side of the transformer must be measured. At this time, it shall be compared with the indication of the primary voltmeter on the control cabinet panel. If the difference is large, find out the cause and eliminate the fault.

c. During the boosting process of each electric field, data records shall be made to record the corresponding secondary voltage value (after corona voltage) when there is a small secondary current, record the corresponding secondary current, primary voltage and primary current value when the secondary voltage rises by 5kV, and draw the volt ampere characteristic curve of static air electric field. The shape of volt ampere characteristic curve of each electric field shall be roughly the same. If individual electric fields are different, they shall be further processed until they meet the requirements. For the use of awn wire, the secondary voltage of the electric field with a distance of 150 mm / 200 mm can reach more than 50 kV / 65 kV; For the electric field with non prick wire and different pole distance of 150mm / 200mm, the secondary voltage value can be more than 55kV / 70kv.

8.10.6 dynamic no-load boost test: if possible, after continuous operation for 24 hours, comprehensively check the operation of each working circuit, find problems and solve them in time.

8.11 hot load commissioning of electrostatic precipitator (72 hour linkage operation).

8.11.1 after the electrostatic precipitator passes the above static and dynamic cold air field boost test, the electrical equipment has the conditions for putting into operation with flue gas. At this time, the maintenance part shall meet the following conditions:

a. All inlet and outlet flues of electrostatic precipitator are installed, the boiler is ready for operation, and the test run of induced draft fan is completed;

b. All ash unloading and conveying systems have been installed, the trial operation of ash flushing water pump has been completed, and the ash flushing water volume has been adjusted properly.

8.11.2 the electrostatic precipitator shall be connected with flue gas, each hole door shall be closed, and the heating system of low-voltage power supply equipment shall be opened to make the temperature of each insulator chamber reach above the dew point temperature of flue gas, so as to ensure that each insulator will not be subject to creepage caused by moisture or condensation. The flue gas shall be connected to heat the electrostatic precipitator itself, so as to improve the insulation resistance of the electric field. Measured with 2500V megohmmeter, it shall reach more than 500m Ω.

8.11.3 put high voltage into operation. When the ignition is started, do not put high voltage into operation to avoid explosion and combustion caused by oil fume in the electrostatic precipitator. At the same time, it can also avoid corrosion caused by oil film on the pole plate and pole line of the precipitator. High voltage can be put into operation only when the load of the precipitator reaches more than 60% and pulverized coal is put into operation (oil gun is not put into operation in principle).

For the boiler ignited by gas, the safety operation regulations shall be strictly implemented, and the high pressure shall not be put into operation before the boiler is put into operation to prevent explosion.

Send high voltage to each electric field according to the step of boosting the cold air electric field. Under normal circumstances, when the electrostatic precipitator is equipped with flue gas, due to the influence of working conditions, the breakdown voltage and secondary current of the electric field are lower than those in the cold air electric field,

8.11.4 select the operating gear according to the working conditions of the electric field and carry out the following settings:

a. The setting of undervoltage value shall be less than the corona starting voltage value;

b. The threshold voltage of spark flashover shall be measured according to the flashover state of electric field, and the threshold voltage shall be adjusted to input the blocking signal;

c. Record the volt ampere characteristic curve of electric field in hot air, and record the values and waveforms of main measuring points.

8.11.5 the multi-functional tracking silicon controlled rectifier device shall be operated in spark tracking, peak voltage tracking, debuggable pulse power supply and other operation modes respectively under the working conditions of no flue gas in cold state and hot flue gas load, record the electric field volt ampere characteristic curves under various modes, measure the values of each measuring point, and observe that the waveform of each measuring point shall be free of deformation.

8.11.6 properly adjust the spark rate according to the operation of the electric field. Generally, the spark rate of the inlet electric field is 30 ~ 60 times / min, the middle electric field is 20 ~ 50 times / min, and the outlet electric field is 10 ~ 20 times / min (or stable at a higher corona power). For the dust with high specific resistance, the spark rate can be appropriately increased. The specific spark rate is subject to the spark rate data after efficiency measurement.

8.11.7 the control equipment with automatic tracking of flashover blocking time shall conduct the step characteristic test of simulated spark flashover blocking time.

8.11.8 when the dust concentration in the electric field is high, the wind speed is high and the air flow distribution is uneven, it will cause frequent flashover of the electric field and even transition to arc pulling. At this time, the sensitivity of the arc extinguishing link can be adjusted to suppress the generation of arc, but the arc extinguishing link should not act under the condition of normal flashover.

8.11.9 when operating with flue gas load, the working conditions of each electric field are different. The tap position of transformer primary side or reactor shall be adjusted according to the actual operation to make the current and feedback waveform smooth and full.

8.11.10 commissioning of low voltage control equipment

8.11.10. L the rapping circuit mainly adjusts the rapping cycle and rapping time, and its setting value is mainly based on the efficiency test results. It can also be adjusted repeatedly to obtain the ideal setting value according to the ash sticking condition of the polar line of the electrode plate after the electrostatic precipitator stops running.

8.10.2 adjustment of ash unloading time: for the ash hopper equipped with material level detection and control, the ash unloading time must be adjusted according to the actual ash volume of each electric field. The principle is that the ash hopper maintains one-third of the ash storage, and the ash conveying time is extended. The principle is that all the ash on the ash conveying channel can be transported. The flushing volume of the hydraulic ash conveying system shall be adjusted to clean the accumulated ash in the ash storage bin.