Let me introduce the design details and characteristics of the dust collector for coal-fired boilers
1. Coal fired boiler flue gas dust collector; It is one of the main production equipment in coal-fired power plants, with generators, steam turbines, boilers, and dust removal equipment being the four major equipment in coal-fired power plants. Bag filters are not only environmentally friendly equipment, but also advantageous production equipment.
2. The box body is composed of an upper box body (clean air chamber), a middle box body (filter chamber), a lower box body (ash hopper), a flue gas distributor, a flower board, a channel, an escalator, a support foot, an air inlet, an ash outlet, insulation, colorful panels, etc. It is assembled in sections and has the characteristics of small footprint, easy transportation and installation.
3. The diversion equipment adopts a new air inlet method and plans a common flue gas distribution equipment, which not only effectively distributes dusty gases, but also separates large particles to avoid dusty gases from washing the filter bag, further increasing power and extending the service life of the filter bag.
4. The use of domestic composite materials and fiberglass resin has increased its durability and extended its service life.
5. The working conditions of bag filter are easily affected by factors such as changes in fuel, boiler load, operating mode, opening of supply and induced draft fans, leakage and bursting of economizer, air leakage and blockage of air preheater, etc., which all change the flue gas volume, flue gas temperature, oxygen content, nitrogen oxide content, humidity content, dust content and smoke particle size to varying degrees, thus affecting the working conditions of the dust collector.
6. The control system mainly consists of a pulse jet control device, a PLC computer control cabinet, a thermal resistance thermometer, static pressure measuring points, material level indicators, and measuring components.
7. The pulse blowing system consists of a recoil header, electromagnetic pulse valve, pressure bearing joint, nozzle tube, bracket, etc. Standards below HGDM-5.6 are for cleaning the entire box of dust, while other standards have a compressed air nozzle tube at the top of each filter bag. During operation, each row of filter bags is usually set to pulse back to clean the dust every 10 seconds, and the solenoid valve is activated on time to inject pulse back compressed air into the filter bags for dust cleaning.
8. The dust collector system should operate for a long time, and whether the dust collector can operate normally will directly affect the normal production of coal-fired power plants.
9. Offline maintenance system: mainly composed of bypass valves, differential pressure equipment, level gauges, thermometers, pressure inspection equipment, pulse controllers, filter bag leak detection equipment, etc.
10. The ash removal system consists of an electric vibrator (air cannon), an electric heater, and an ash level indicator. The dust generated by the electric vibrator (air cannon) has good fluidity.
11. The damaged filter bag of the bag filter will accelerate the wear of the induced draft fan. Poor or malfunctioning dust removal systems can increase the resistance of bag filter systems, reduce boiler output, and even cause furnace noise. Therefore, bag filter systems should have measures in place, and the automatic control system should have complete automatic monitoring, control, fault diagnosis, and emergency response functions. Strict operating procedures should be formulated to implement job responsibility systems for operation, management, and maintenance.
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