The precondition and consideration of the reconstruction of boiler baghouse filter

Dec 30, 2019

Boiler bag filter is a commonly used supporting equipment in boiler and industrial production, mainly to remove the boiler fuel and combustion process in the discharge of flue gas particles smoke, can greatly reduce the amount of smoke discharged into the atmosphere, as a very necessary environmental protection equipment to improve the pollution environment, improve air quality. Boiler bag filter is suitable for dedusting, removing smoke and desulphurizing in coal-fired and oil-fired boilers and kilns. It is characterized by low resistance, flexible installation and arrangement, high desulphurizing efficiency and long service life. Because most of the original manufacturers are using electrostatic precipitator, but its emissions have been unable to meet the current emission requirements, if not up to the standard emissions will be forced to shut down, so the boiler dust collector is imperative. Botou longtai environmental protection equipment co., LTD is a strong and honest enterprise. We committed to environmental protection equipment, dust collector accessories for years, pulse bag dust collector and other engineering equipment research and development of new efficient environmental control technology, clean and environmental protection technology, to promote industry from the pollution source of environmental governance, development to adapt to various complicated working condition of pollution control technology, to meet the different needs of the market. The company has a complete and scientific quality management system, for the product quality has been strictly controlled, welcome to visit the factory and discuss with us.

Boiler bag precipitator reform premise and consider a problem: the internal structure of boiler precipitator and technical reasons, has amounted to less than some of the local environmental emissions standards, in order to cooperate with national policy, some manufacturers are faced with the electrostatic precipitator transformation problem, boiler precipitator converted into bag filter can effectively reduce dust emission concentration.

1. Remove the electric field cathode frame and anode plate row, anode plate and cathode line, inner cover and outer cover and other related equipment of the original electrostatic precipitator. Make sure the inside of the esp is hollow and clean.

2. Redesign and process the top cover of the boiler dust collector, install the cleaning chamber on the top cover, part of the bag ash removal system, such as the pulse valve, and add the flue gas bypass.

3. Add the air end wall at the outlet of the original electrostatic precipitator, keep the inlet flue of the original electrostatic precipitator, and re-design and install the air distribution board and diversion separator. The inlet flue shall be disconnected at the designed installation position due to the installation of baffle door.

4, retain the original electrical precipitator flue and smoke box exports, export smoke box at the top of the bell mouth opening, export flue from net chamber after a hole with the original export bell mouth is linked together, both meet the design requirements, and make the most of the shell of the former electric precipitator and flue, saving the cost and make full use of the original dust collector thermal insulation system. Add body and equipment for insulation design, and responsible for the implementation of the installation. Restore and update the parts damaged or removed by thermal insulation of the dust collector;

5. Add bypass flue and bypass valve. The by-pass flue ensures that the flue gas does not come into contact with the filter bag when the by-pass valve is opened. It is used to protect the cloth bag when the boiler starts and stops oil combustion and the boiler exhaust temperature is too hot. At the same time, off-line inspection of the dust collector can be realized. By PCL control, the by-pass valve is automatically opened and the flue gas inlet valve is closed. The flue gas directly enters the exhaust flue through the by-pass flue, effectively protecting the filter bag.

6. Add necessary ladder platform and lighting, add a 30m3 air compressor, and add compressed air storage tank, adsorption dryer and compressed air transmission pipeline.

It is suitable for collecting fine, dry and non-fibrous dust. Filter bag used textile filter cloth or non textile mat is made, using the fabric filter effect of dust filters, gas when dusty gas into the bag filter, large particles, major dust, due to the effect of gravity settling down, fall into the hopper, contains the fine dust of gas through the filter material, the dust were blocked, the purified gas.

The filter bag is sprayed with compressed air for ash cleaning, and the cleaning mechanism is composed of air bag, jet tube and electromagnetic pulse control valve. In the filtration room, the top of the outlet of each row of filter bags is equipped with a spray pipe, and the lower side of the spray pipe is directly opposite the center of the filter bag, and a pulse valve is arranged on each spray pipe and communicated with the compressed air bag. Dust, pulse valve solenoid valve open, compressed air after spraying the dust control device (differential pressure or timing, manual control) open the electromagnetic pulse injection, according to the setting process of compressed gas in a very short time according to the order by the pulse valve by the spray nozzle on the blowpipe induced many times the injection volume of air into the filter bag, air wave formation, make the bottom of the filter bag from mouth to produce a sharp expansion and shock vibration, cause strong soot cleaning action, shake off the dust on the filter bag.