CN110000158B - Program-controlled gas-phase electrical switch cabinet dust removal system and control method - Google Patents
Program-controlled gas-phase electrical switch cabinet dust removal system and control method Download PDFInfo
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- CN110000158B CN110000158B CN201910328991.9A CN201910328991A CN110000158B CN 110000158 B CN110000158 B CN 110000158B CN 201910328991 A CN201910328991 A CN 201910328991A CN 110000158 B CN110000158 B CN 110000158B
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- 239000000428 dust Substances 0.000 title claims abstract description 197
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 239000003365 glass fiber Substances 0.000 claims abstract description 17
- 238000010926 purge Methods 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 230000007774 longterm Effects 0.000 claims abstract description 6
- 239000000809 air pollutant Substances 0.000 claims description 18
- 231100001243 air pollutant Toxicity 0.000 claims description 18
- 239000003344 environmental pollutant Substances 0.000 claims description 10
- 231100000719 pollutant Toxicity 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 238000011065 in-situ storage Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000004364 calculation method Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 description 8
- 239000002817 coal dust Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
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- 230000002265 prevention Effects 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention discloses a program-controlled gas phase electrical switch cabinet dust removal system and a control method, comprising the following steps: the system comprises a gas purging system, an electric dust removing and vibrating system and a dust removing control system; the gas purging system comprises an air compressor unit, a gas storage bottle and a gas converging channel, wherein outlet pipes of the air compressor unit and the gas storage bottle are communicated with the gas converging channel through control valves, and the outlet end of the gas converging channel is connected with a high-speed airflow nozzle and a gas guiding air curtain; the electric dust removing and vibrating system comprises an electrode grid, a vibrating assembly and a glass fiber dust filtering grid. The system can be suitable for cleaning various electrical switch cabinets of a thermal power plant; and an automatic comprehensive control system is adopted, and the equipment cleaning operation of the electrical switch cabinet in a long-term continuous and interlocking working mode is realized through on-site sampling, analysis and calculation and automatic output control. The system has the advantages of simple structure, mature technology, low failure rate, high reliability, simple manufacturing cost and daily operation and maintenance and low cost.
Description
Technical Field
The invention relates to the field of electrical equipment, relates to an electrical equipment cleaning technology of a thermal power plant, and particularly relates to a program-controlled gas-phase electrical switch cabinet dust removal system and a control method.
Background
The production process of the thermal power plant generates a large amount of coal, ash and lime dust, and the micron-sized fine dust can be diffused and permeated into the cabinet bodies of various electrical switch cabinets of the power plant. Dust particles form a pile at the bus, insulator, terminal and other parts under the action of natural gravity or because the charged body has adsorptivity to particles. All the electrical switch cabinets are operated for a long time, the equipment is in a closed state, a large amount of dust accumulation is easy to form, and proper time and measures are difficult to remove. Dust accumulation can deteriorate the heat dissipation condition of electrical equipment, the running temperature of the equipment is increased, and insulation and device aging are accelerated; the coal dust has the characteristics of conductivity and combustibility, and once the insulation is aged and damaged, explosion is extremely likely to happen due to the fact that electric sparks are formed by the conductive breakdown of the coal dust, so that serious consequences and great losses are caused. Therefore, it is very important to keep the equipment clean for safe operation to remove dust from the electrical equipment frequently.
At present, electric equipment of a thermal power plant is cleaned by manual operation during unit overhaul and operation. The manual maintenance cost is high, the efficiency is low, the operation reliability is poor, and no perfect program-controlled gas phase electric switch cabinet dust removal system exists at present.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a program-controlled gas-phase electrical switch cabinet dust removal system and a control method. The system adopts the program automatic control system to implement the online cleaning operation of the electrical equipment, can ensure the cleaning safety of the electrical equipment, reduces the manual labor and improves the operation reliability.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a programmed gas phase electrical switchgear dust removal system comprising: a gas purging system, an electric dust removing and vibrating system and a dust removing control system;
the gas purging system comprises an air compressor unit, a gas storage bottle and a gas converging channel, wherein outlet pipes of the air compressor unit and the gas storage bottle are communicated with the gas converging channel, and the outlet end of the gas converging channel is connected with a high-speed airflow nozzle and a gas guiding air curtain; the high-speed air flow nozzle and the air guiding air curtain are both arranged in the electrical switch cabinet;
the electric dust removing and vibrating system comprises an electrode grid, a vibrating assembly and a glass fiber dust filtering grid; the electrode grid, the vibrating assembly and the glass fiber dust filtering grid are all arranged in the electrical switch cabinet;
the dust removal control system comprises a control bus, a dust removal controller, a valve control box and an electric dust removal and vibration control box, wherein the dust removal controller, the valve control box and the electric dust removal and vibration control box are all electrically connected with the control bus, the control bus is respectively connected with each control valve of the gas storage bottle, the air compressor unit and the high-speed air flow nozzle through control sub-lines, and the valve control box is electrically connected with each control valve of the gas blowing system; the electric dust removing and vibrating control box is electrically connected with the electrode grid and the vibrating assembly.
The outlet pipeline of the air compressor unit is connected with the inflow end of the first control valve, and the outflow end of the first control valve is connected with the gas converging channel; the air outlet nozzle of the air storage bottle is connected with the inflow end of the second control valve, and the outflow end of the second control valve is connected with the gas converging channel; the high-speed air flow nozzle is connected with the outflow end of the third control valve, and the inflow end of the third control valve is connected with the air converging channel.
The electrode grid is arranged at an air outlet at the top of the electrical switch cabinet; the vibration total component is arranged at four corners of the electrical switch cabinet in three layers; the glass fiber dust filtering grid is arranged on an air inlet pipeline of the air compressor unit and an air outlet at the top of the electrical switch cabinet; the high-speed air flow nozzles are arranged at four corners of the bottom of the electrical switch cabinet; the air curtain is arranged at the air inlet at the bottom of the electrical switch cabinet.
The outlet pipes of the air compressor unit and the air storage bottle are copper guide pipes; the gas collecting pipe adopts a copper guide pipe; and a safety valve is arranged on the gas converging channel.
The dust removal controller and the control bus are arranged in the control room; the air compressor unit, the gas storage bottle, the valve control box and the electric dust removal and vibration control box are arranged beside the electric switch cabinet.
The gas concentration meter and the in-situ interlock switch are arranged beside the electrical switch cabinet, and the control bus is connected with the gas concentration meter and the in-situ interlock switch through control sub-wires in a signal mode.
The high-speed air flow nozzle and the air guide air curtain are arranged on the adjusting seat and used for adjusting the angle and the swing angle.
The control method of the program-controlled gas phase electrical switch cabinet dust removal system comprises the following steps:
under normal state, the dust removal controller automatically controls the operation of the air compressor unit, the valve control box and the electric dust removal and vibration control box according to a program, and continuous or periodic intermittent purging and cleaning are implemented on the switch cabinet: compressed air is led into a gas converging channel, and the system is pressurized during operation; the high-pressure air is pushed to the guiding air distribution curtain to generate swinging jet flow, clean fresh air is continuously fed into the switch cabinet body, and a micro positive pressure air field is established in the switch cabinet; the air in the cabinet is circularly discharged after dust removal and purification through the electrode grid at the top of the cabinet and the glass fiber dust filtering grid.
The method also comprises the following steps:
the gas concentration meter samples the concentration of air pollutants and dust on the site of the detection equipment in real time, and sends the detection parameters to the dust removal controller through the control bus for comparison and analysis;
when the concentration of air pollutants and dust on the equipment site reaches a preset starting value of a control system or leakage and diffusion of pollutants and dust possibly occur in the process flow of material conveying and transporting, the dust removal controller starts an air compressor unit, a valve control box and an electric dust removal and vibration control box; compressed air is led into a gas converging channel, and the system is pressurized during operation; the high-pressure air is pushed to the guiding air distribution curtain to generate swinging jet flow, and clean fresh air is continuously fed into the switch cabinet body; if the concentration of air pollutants and dust in the equipment site is increased, the dust removal controller increases the output of the air compressor unit, improves the wind pressure and the wind quantity, and simultaneously starts the vibration assembly and the vibration cabinet body; and the dust removal controller regulates the system to resume the normal working state until the concentration of air pollutants and dust on the equipment site is restored to be normal.
The method also comprises the following steps:
after long-term operation, dust particles are accumulated in the switch cabinet, and the dust removal controller adopts pulse airflow and vibration to enhance the dust removal effect;
the dust removal controller starts the air compressor unit, the valve control box, the electric dust removal and vibration control box and the gas storage bottle, compressed air forms pulse impact turbulence through the high-speed air flow nozzle, the vibration assembly shakes the cabinet body, the vibration dust accumulation is dispersed under the impact of the pulse turbulence, and the compressed air is circularly discharged after being removed dust and purified along with the fresh air flow of the system through the electrode grid at the top of the cabinet and the glass fiber dust filtering grid.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to a program-controlled gas-phase electric switch cabinet dust removal system, which is based on the actual running environment with high concentration of coal dust, lime dust and dust in the air of a power plant, and on the basis of identifying and analyzing the danger formed by electric equipment of the power plant, carries out automatic online dust removal measures in a targeted manner, takes clean air as a medium, generates swinging jet flow after filtering and pressurizing the dust, continuously sends clean fresh air into a switch cabinet body, establishes a micro-positive pressure air field in the switch cabinet, and prevents pollutants and dust outside the cabinet from entering the cabinet; the system can also form pulse impact turbulence, and the system can be matched with a rapping assembly to shake a cabinet body, shake dust accumulation, scatter under the impact of the pulse turbulence, and play a role in cleaning the dust accumulation of the switch cabinet along with the discharge of fresh air flow of the system. The application program automatically controls the dust removal system to implement the online cleaning operation of the electrical equipment, so that the cleaning safety of the electrical equipment can be ensured, the manual labor is reduced, and the operation reliability is improved. The system can be suitable for cleaning various electrical switch cabinets of a thermal power plant; and an automatic comprehensive control system is adopted, and the equipment cleaning operation of the electrical switch cabinet in a long-term continuous and interlocking working mode is realized through on-site sampling, analysis and calculation and automatic output control. The on-line cleaning operation of the electrical equipment is implemented by adopting the program automatic control system, so that the cleaning safety of the electrical equipment can be ensured, the manual labor is reduced, and the operation reliability is improved.
According to the control method, cleaning can be automatically started according to the dust and pollutant concentration on the spot or the link of generating dust pollutants possibly according to the production flow, fresh air is pushed to be led into a gas collecting channel and is pushed to a guiding air distribution curtain by high-pressure gas, and the fresh air is sprayed to the production spot for dust removal and dust prevention control. And the high-speed airflow nozzle can be used for carrying out powerful dust removal.
Drawings
FIG. 1 is a process flow diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the system of the present invention (front view);
FIG. 3 is a schematic diagram (top view) of the system of the present invention;
in the figure: 1. an air compressor unit; 2. a dust removal controller; 3. a valve control box; 4. an electric dust removal and vibration control box; 5. a control valve; 6. a high-speed air flow nozzle; 7. a gas guiding air curtain; 8. a safety valve; 9. a gas sink; 10. a control bus; 11. a valve control line; 12. a gas cylinder; 13. a gas concentration meter; 14. an in situ interlock switch; 15. an electrode grid; 16. a rapping assembly; 17. glass fiber dust filter grid.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, which illustrate but do not limit the invention.
As shown in fig. 1 to 3, the dust removing system and the control method of the program-controlled gas-phase electrical switch cabinet of the invention comprise the following steps: the system comprises a gas purging system, an electric dust removing and vibrating system and a dust removing control system;
the purging control subsystem comprises an air compressor unit 1, an air storage bottle 12 and a gas converging channel 9, wherein outlet pipes of the air compressor unit 1 and the air storage bottle 12 are communicated with the gas converging channel 9 through control valves, and the outlet end of the gas converging channel 9 is connected with a high-speed air flow nozzle 6 and a gas guiding air curtain 7; the high-speed air flow nozzle 6 and the air guiding air curtain 7 are arranged in the electrical switch cabinet;
the electric dust removing and vibrating system comprises an electrode grid 15, a vibrating assembly 16 and a glass fiber dust filtering grid 17; the electrode grid 15, the vibrating assembly 16 and the glass fiber dust filtering grid 17 are all arranged in the electrical switch cabinet;
the dust removal control system comprises a control bus 10, a dust removal controller 2, a valve control box 3 and an electric dust removal and vibration control box 4, wherein the dust removal controller 2, the valve control box 3 and the electric dust removal and vibration control box 4 are all electrically connected with the control bus 10, the control bus 10 is respectively in signal connection with each control valve of the gas storage bottle 12, the air compressor unit 1 and the high-speed air flow nozzle 6 through control sub-lines, and the control bus 10 is in signal connection with the gas concentration meter 13 and the on-site interlocking switch 14 through control sub-lines; the valve control box 3 is electrically connected with each control valve; the electric dust removing and vibrating control box 4 is electrically connected with the electrode grid 15 and the vibrating assembly 16.
Examples
As shown in fig. 1 to 3, a dust removing system of a program controlled gas phase electrical switch cabinet comprises an air compressor unit 1, a dust removing controller 2, a valve control box 3, an electric dust removing and vibrating control box 4, a control valve 5, a high-speed air flow nozzle 6, a gas guiding air curtain 7, a safety valve 8, a gas collecting channel 9, a control bus 10, a valve control line 11, a gas storage bottle 12, a gas concentration meter 13, an in-situ interlocking switch 14, an electrode grid 15, a vibrating assembly 16 and a glass fiber dust filtering grid 17.
The air outlet of the air compressor unit 1 is connected with the inflow end of the control valve TJF1 through a copper conduit, and the outflow end of the control valve TJF1 is connected with the gas confluence channel HLG9 through a copper conduit.
The air outlet nozzle of the air storage bottle 12 is connected with the inflow end of a control valve TJF2, and the outflow end of the control valve TJF2 is connected with the gas converging channel 9; the high-speed air flow nozzle 6 is connected with the outflow end of the control valve TJF3, and the inflow end of the control valve TJF3 is connected with the air converging channel 9. The control valves 5 are provided with corresponding valve control boxes 3.
The air flow terminal of the air converging channel HLG9 is connected with a guiding air distribution curtain 7; the gas sink HLG9 is provided with a safety valve AQF.
The rapping assembly 16 comprises a drive motor, a transmission mechanism and a flexible insulating rubber rapping hammer. The driving mechanism is driven by the driving motor to make the small beating hammer vibrate periodically and reciprocally, the switch cabinet body is evenly beaten, and dust is scattered by vibration. The electric dust removal and rapping control box 4 supplies the rapping assembly 16 with electric energy and controls the running rhythm and the rapping energy.
The gas purging system is provided with a corresponding dust removal controller 2 and a control bus 10; the corresponding field measurement and control equipment comprises: gas concentration meter 13, in-situ operation interlock switch 14. The system is controlled by a computer program and an automatic or manual mode of operation can be selected. In the automatic working mode, the system is started by the field measurement and control equipment, and the controller schedules the pressure, flow and output of the whole system equipment according to the program setting flow and parameters so as to adapt to the running environment and the cleaning and purging requirements of operators.
The dust removal controller 2 and the control bus 10 are arranged in a control room. The indoor has heating ventilation and lighting facilities. The air compressor unit 1, the gas cylinder 12, the valve control box 3, the electric dust removal and vibration control box 4, the gas concentration meter 13 and the on-site interlock switch 14 are arranged beside the electric switch cabinet. The gas collecting channel 9 is communicated with related equipment and guides clean fresh air to the field switch cabinet.
The dust removal controller 2 automatically controls the operation of the air compressor unit 1, the valve control box 3 and the electric dust removal and vibration control box 4 according to a program in a normal state, and continuously or periodically and intermittently sweeps and cleans the switch cabinet. The first control valve TJF1 is fully opened, compressed air is led into the gas converging channel 9, and the system is pressurized during operation; the high-pressure gas is pushed to the guiding air distribution curtain 7 to generate swinging jet flow, clean fresh air is continuously fed into the switch cabinet body, a micro positive pressure air field is established in the switch cabinet, and pollutants and dust outside the cabinet are prevented from entering the cabinet; the air in the cabinet is circularly discharged after dust removal and purification through the cabinet top electrode grid 15 and the glass fiber dust filtering grid 17.
The dust removal controller 2 can send out a signal to prompt the attention of on-site operators.
The gas collecting channel 9 and the connecting pipe are made of copper materials, the load requirements of equipment foundation load equipment are met, the gas collecting channel is firm and straight, and the size of the embedded part is accurate.
The invention also provides a control method of the program-controlled gas-phase electrical switch cabinet dust removal system, which comprises the following steps:
the gas concentration meter 13 samples the concentration of air pollutants and dust on the site of the detection equipment in real time, and sends the detection parameters to the dust removal controller 2 through the control bus 10 for comparison analysis;
when the concentration of air pollutants and dust on the equipment site reaches a preset starting value of a control system or leakage and diffusion of pollutants and dust possibly occur in the process flow of material transfer and transportation, the dust removal controller 2 starts the air compressor unit 1, the valve control box 3 and the electric dust removal and vibration control box 4; the first control valve TJF1 is fully opened, compressed air is led into the gas converging channel 9, and the system is pressurized during operation; the high-pressure gas is pushed to the guiding air distribution curtain 7 to generate swinging jet flow, clean fresh air is continuously fed into the switch cabinet body, a micro positive pressure air field is established in the switch cabinet, and pollutants and dust outside the cabinet are prevented from entering the cabinet; if the concentration of air pollutants and dust on the equipment site is increased, the dust removal controller 2 increases the output of the air compressor unit 1, improves the wind pressure and the wind quantity, and simultaneously starts the vibrating assembly 16 to vibrate the cabinet body to prevent dust and sundries from accumulating. Until the concentration of air pollutants and dust on the equipment site is recovered to be normal, the dust removal controller 2 regulates the system to recover to be in a normal working state. The dust removal controller 2 can send out a signal to prompt the attention of on-site operators.
Preferably, the process running state and the on-site dust and pollutant gas concentration parameters are comprehensively analyzed by the dust removal controller 2, and the optimal control mode is output after optimization calculation, so that the pressure of the air compressor unit 1 is regulated, and the opening of a valve is controlled to regulate the cleaning gas to achieve optimal wind pressure and flow.
Preferably, the dust removal controller 2 controls the guiding air distribution curtain 7 to generate swinging jet flow, clean fresh air is continuously fed into the switch cabinet body, a micro positive pressure air field is established in the switch cabinet, and dust is prevented from entering the switch cabinet.
Preferably, the dust removal controller 2 controls the electric field intensity of the electrode grid 15 to adjust the dust removal effect of the electric dust removal.
Preferably, the dust removal controller 2 controls the rapping intensity and frequency of the rapping assembly 16, adjusts the effect of the dust removal, and prevents dust from accumulating.
Preferably, the gas manifold HLG9 is configured with a safety pressure protection valve AQF to ensure that the system operating pressure does not exceed a safety protection value.
The working principle of the program-controlled gas-phase electrical switch cabinet dust removal system provided by the application is explained in detail below.
The dust removal controller 2 is adopted to realize automatic program monitoring of the whole sweeping and cleaning process of various electrical switch cabinets of the thermal power plant, and the operation is automatically put into or taken out of according to the air pollutant and dust concentration on the equipment site or the interlocking requirement of the cleaning production process.
The air compressor unit 1, the dust removal controller 2, the valve control box 3 and the electric dust removal and vibration control box 4 are in an electrified working state under normal conditions. The gas manifold 9 and the gas pressure of the gas storage bottle 12, the voltage of the electrode grid 15 are important system parameter values, and the voltage is monitored by the dust removal controller 2.
The gas concentration meter 13 samples and detects the concentration of air pollutants and dust in the production site in real time, and sends the detection parameters to the dust removal controller 2 for analysis through the control bus 10. When the concentration of air pollutants and dust on the equipment site reaches a preset starting value of a control system, the dust removal controller 2 starts the air compressor unit 1, the valve control box 3 and the electric dust removal and vibration control box 4; the first control valve TJF1 is fully opened, compressed air is led into the gas converging channel 9, and the system is pressurized during operation; the high-pressure gas is pushed to the guiding air distribution curtain 7 to generate swinging jet flow, clean fresh air is continuously fed into the switch cabinet body, a micro positive pressure air field is established in the switch cabinet, and pollutants and dust outside the cabinet are prevented from entering the cabinet; if the concentration of air pollutants and dust on the equipment site is increased, the dust removal controller 2 increases the output of the air compressor unit 1, improves the wind pressure and the wind quantity, and simultaneously starts the vibrating assembly 16 to vibrate the cabinet body to prevent dust and sundries from accumulating. Until the concentration of air pollutants and dust on the equipment site is recovered to be normal, the dust removal controller 2 regulates the system to recover to be in a normal working state. The dust removal controller 2 can send out a signal to prompt the attention of on-site operators.
After long-term operation, dust particles are accumulated in the switch cabinet, and the dust removal controller (2) adopts pulse airflow and vibration to enhance the dust removal effect. The dust removal controller 2 starts the air compressor unit 1, the valve control box 3, the electric dust removal and vibration control box 4 and the gas storage bottle 12, compressed air forms pulse impact turbulence through the high-speed air flow nozzle 6, the vibration assembly 16 shakes the cabinet body, vibration dust accumulation is dispersed under the impact of the pulse turbulence, and the compressed air is circularly discharged after being removed dust and purified along with the fresh air flow of the system through the cabinet top electrode grid 15 and the glass fiber dust filtering grid 17.
The dust removal controller 2 adjusts the output of the system and the opening of the valve according to the detection data of the gas concentration meter 13, and controls the pressure and the flow of the clean fresh air; the angle and swing angle of the air guiding air curtain 7, the electric field intensity of the electrode grid 15, the vibration intensity and frequency of the vibration assembly 16 and the like are controlled so as to achieve the optimal blowing and cleaning prevention and control effect.
The gas concentration meter 13 will continuously detect the air contaminant and dust concentration of the field switchgear, and when the concentration is higher than the alarm value, immediately alarm on the operating main screen and automatically start the purge procedure. And after the concentration of air pollutants and dust of the field switch cabinet is continuously reduced in the system purging process, the control system gradually reduces the output of the system until the normal working state is restored.
The working state parameters, the switching state and the like of the equipment in the system are monitored by the dust removal controller 2, and when equipment faults, abnormal switching state and the like are diagnosed, the equipment is immediately alarmed to an operator to prompt overhaul.
The invention discloses a program-controlled gas-phase electric switch cabinet dust removal system and a control method, which are used for pertinently implementing automatic online dust removal measures on the basis of identifying and analyzing dangers formed by electric equipment of a power plant based on an actual running environment with high concentration of coal dust, lime dust and coal dust in the air of the power plant.
The system can be suitable for cleaning various electrical switch cabinets of a thermal power plant; and an automatic comprehensive control system is adopted, and the equipment cleaning operation of the electrical switch cabinet in a long-term continuous and interlocking working mode is realized through on-site sampling, analysis and calculation and automatic output control. The system has the advantages of simple structure, mature technology, low failure rate, high reliability, simple manufacturing cost and daily operation and maintenance and low cost.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. A programmed gas phase electrical switchgear dust removal system, comprising: a gas purging system, an electric dust removing and vibrating system and a dust removing control system;
the gas purging system comprises an air compressor unit (1), a gas storage bottle (12) and a gas converging channel (9), wherein outlet pipes of the air compressor unit (1) and the gas storage bottle (12) are communicated with the gas converging channel (9), and the outlet end of the gas converging channel (9) is connected with a high-speed air flow nozzle (6) and a gas guiding air curtain (7); the high-speed air flow nozzle (6) and the air guiding air curtain (7) are both arranged in the electrical switch cabinet;
the electric dust removing and vibrating system comprises an electrode grid (15), a vibrating assembly (16) and a glass fiber dust filtering grid (17); the electrode grid (15), the vibrating assembly (16) and the glass fiber dust filtering grid (17) are all arranged in the electrical switch cabinet;
the dust removal control system comprises a control bus (10), a dust removal controller (2), a valve control box (3) and an electric dust removal and vibration control box (4), wherein the dust removal controller (2), the valve control box (3) and the electric dust removal and vibration control box (4) are electrically connected with the control bus (10), the control bus (10) is respectively connected with each control valve of the gas storage bottle (12), the air compressor unit (1) and the high-speed air flow nozzle (6) through control sub-lines, and the valve control box (3) is electrically connected with each control valve of the air blowing system; the electric dust removal and vibration control box (4) is electrically connected with the electrode grid (15) and the vibration assembly (16);
the electrode grid (15) is arranged at an air outlet at the top of the electrical switch cabinet; the vibrating assembly (16) is arranged at four corners of the electrical switch cabinet in three layers; the glass fiber dust filtering grid (17) is arranged on an air inlet pipeline of the air compressor unit (1) and an air outlet at the top of the electrical switch cabinet; the high-speed air flow nozzles (6) are arranged at four corners of the bottom of the electrical switch cabinet; the air guide curtain (7) is arranged at the air inlet at the bottom of the electrical switch cabinet;
the high-speed air flow nozzle (6) and the air guide air curtain (7) are arranged on the adjusting seat and used for adjusting the angle and the swing angle;
the outlet pipeline of the air compressor unit (1) is connected with the inflow end of a first control valve (TJF 1), and the outflow end of the first control valve (TJF 1) is connected with a gas converging channel (9); the air outlet nozzle of the air storage bottle (12) is connected with the inflow end of a second control valve (TJF 2), and the outflow end of the second control valve (TJF 2) is connected with the gas converging channel (9); the high-speed air flow nozzle (6) is connected with the outflow end of a third control valve (TJF 3), and the inflow end of the third control valve (TJF 3) is connected with the air converging channel (9);
the gas concentration meter (13) and the in-situ interlocking switch (14) are arranged beside the electrical switch cabinet, and the control bus (10) is in signal connection with the gas concentration meter (13) and the in-situ interlocking switch (14) through control sub-wires.
2. The dust removal system of the program controlled gas phase electrical switch cabinet according to claim 1, wherein the outlet pipes of the air compressor unit (1) and the gas cylinder (12) are copper pipes; the gas collecting channel (9) adopts a copper guide pipe; and a safety valve (8) is arranged on the gas collecting channel (9).
3. The system according to claim 1, wherein the dust removal controller (2) and the control bus (10) are arranged in a control room; the air compressor unit (1), the air storage bottle (12), the valve control box (3) and the electric dust removal and vibration control box (4) are arranged beside the electric switch cabinet.
4. A method of controlling a programmable gas phase electrical switching cabinet dust removal system according to any one of claims 1 to 3, comprising the steps of:
under the normal state, the dust removal controller (2) automatically controls the operation of the air compressor unit (1), the valve control box (3) and the electric dust removal and vibration control box (4) according to a program, and continuous or periodic intermittent purging and cleaning are implemented on the switch cabinet: compressed air is led into a gas collecting channel (9), and the system is pressurized during operation; the high-pressure gas is pushed to a gas guide air curtain (7) to generate swinging jet flow, clean fresh air is continuously fed into the switch cabinet body, and a micro positive pressure air field is established in the switch cabinet; the air in the cabinet is circularly discharged after dust removal and purification through the cabinet top electrode grid (15) and the glass fiber dust filtering grid (17).
5. The method for controlling a programmable gas phase electrical switching cabinet dust removal system of claim 4, further comprising the steps of:
the gas concentration meter (13) samples the concentration of air pollutants and dust on the site of the detection equipment in real time, and sends the detection parameters to the dust removal controller (2) through the control bus (10) for comparison analysis;
when the concentration of air pollutants and dust on the equipment site reaches a preset starting value of a control system or leakage and diffusion of pollutants and dust occur due to the process flow of material conveying and transporting, the dust removal controller (2) starts the air compressor unit (1), the valve control box (3) and the electric dust removal and vibration control box (4); compressed air is led into a gas collecting channel (9), and the system is pressurized during operation; the high-pressure gas is pushed to a gas guiding air curtain (7) to generate swinging jet flow, and clean fresh air is continuously fed into the switch cabinet body; if the concentration of air pollutants and dust in the equipment site is increased, the dust removal controller (2) increases the output of the air compressor unit (1), increases the wind pressure and the wind quantity, and simultaneously starts the vibrating assembly (16) to vibrate the cabinet body; and the dust removal controller (2) regulates the system to restore to a normal working state until the concentration of air pollutants and dust on the equipment site is restored to be normal.
6. The method for controlling a programmable gas phase electrical switching cabinet dust removal system of claim 5, further comprising the steps of:
after long-term operation, dust particles are accumulated in the switch cabinet, and the dust removal controller (2) adopts pulse airflow and vibration to enhance the dust removal effect;
the dust removal controller (2) starts the air compressor unit (1), the valve control box (3), the electric dust removal and vibration control box (4) and the gas storage bottle (12), compressed air forms pulse impact turbulence through the high-speed air flow nozzle (6), the vibration assembly (16) shakes the cabinet body, vibration dust accumulation is dispersed under the pulse turbulence impact, and the dust is circularly discharged after being removed dust and purified along with the new air flow of the system through the cabinet top electrode grid (15) and the glass fiber dust filtering grid (17).
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| CN110556719B (en) * | 2019-08-16 | 2020-09-25 | 程强 | Pneumatic power-off and power-on and dust-removal device and method for distribution box |
| CN111001632A (en) * | 2019-12-02 | 2020-04-14 | 平庆义 | Ash removal method for coating equipment |
| CN112284879A (en) * | 2020-10-26 | 2021-01-29 | 江苏永钢集团有限公司 | Interlocking device of upsetting testing machine |
| CN113275316A (en) * | 2021-05-07 | 2021-08-20 | 广东电网有限责任公司广州供电局 | Cleaning device |
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