The dust removal efficiency of a bag filter is inseparable from its principle of ash removal. When the smoke and dust body enters the bin through the baffle plate and enters the bin under the lower side of the dust removal device, the coarse particles will fall into the silo due to the impact of the baffle plate and the reduction of the steam rate, and other fine particles will enter the dust bag room with the steam as the steam comes out of the bag. Steam pipe discharges. Dust deposited on the bag is removed by reverse washing of the vapor body. The dust removed is placed in the bin and discharged into the ash conveying equipment by two-layer star discharger. Dust deposited on the bag can also be removed by single pulse cyclone of the gas generator, which exceeds the purpose of dust removal. The dust removed by the bag filter has high dust removal efficiency and is inseparable from the filter material. The filter material is also inseparable from the filter material. The performance and quality of bag filter are directly related to the performance and service life of bag filter. The filter material is the main material for making filter bag. Its performance and quality promote the technological progress of bag filter and affect its application scope and service life. 
The former one is made of organic or inorganic fibers, while the latter one is made of particles of different sizes, such as quartz sand, River sand, ceramsite sand, fly ash and so on. When the diaphragm gives instructions, the pulse valve opens and the compressed air in the high-pressure air chamber opens. If there is no dust or small enough, the mechanical cleaning will stop working.
The method of purifying gas of bottom pressure single pulse bag filter is external filter type. The smoke and dust vapor body enters into each module's mistake chamber from the baffle tube. Because in the design scheme, there are sufficient and effective cyclones flowing into the middle chamber according to the appropriate baffle and nature, which are more uniform than all the excessive indoor air quality. The smoke and dust vapor body enters into the middle chamber with the airflow. The filter area is adsorbed on the outside surface of the filter bag. The filtered clean gas is discharged through the upper box and exhaust duct through the filter bag.
The dust bag is compressed by air to carry out the ash removal from the gas producer. The ash removal structure is made up of air bag, spray boiler blowpipe and electromagnetic pulse regulating valve. There is a blowpipe boiler on the top assembly line of every dedusting cloth bag inlet and outlet in the room. The lower side of the spraying boiler tube is blowing the blowhole on the bottom of the dust bag management center, and there are 1 pulse electromagnetic valves and air pressure on each boiler blowpipe. When cleaning, the solenoid valve opens the pulse valve, and the compressed air is sprayed by the dust cleaning control device (differential pressure or timing, manual control) to open the electromagnetic pulse injection according to the set procedure. The compressed gas is induced into the filter bag by the nozzles on the injection tube through each pulse valve in a very short time sequence, forming air wave, which causes the filter bag to be generated from the bag mouth to the bottom. Rapid expansion and shock vibration, resulting in a strong dust removal effect, shake off the dust on the filter bag. 
(1) ash removal efficiency is usually about 99%, and the concentration of smoke and dust in the inlet and outlet of the dust removal equipment is less than 10 mg/m3, which has a high grade classification efficiency for sub micron m fine dust.
(2) The range of air handling capacity is wide, the small number of M3 is only 1 minute, and the large one can reach tens of thousands of m3 in one minute. It can be used for flue gas dust removal of industrial furnaces and kilns to reduce the emission of atmospheric pollutants.
_The structure is simple and easy to maintain and operate.
(4) On the premise of ensuring the same high ash removal efficiency, the cost of the project is less than that of the electrostatic precipitator.
_When glass fibre, ptfe, P84 and other heat-resistant filter materials are selected, they can operate under the high temperature standard of about 200 C.
(5) It is insensitive to the characteristics of dust and is not affected by dust and resistance.