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Advantages of pulse jet ash cleaning method for bag filter

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Advantages of pulse jet soot cleaning method for bag filter

Source: Botou Kangyue environmental protection Release time: 2020/10/19 8:46:11
There is a jet pipe above each row of dust removal filter bags, on which a compressed air jet hole (nozzle) is opened to the center of each filter bag. The other end of the spray pipe is connected with the pulse control system composed of pulse valve, control valve, etc. and compressed air storage tank. According to the specified time interval or resistance value, the pulse jet soot cleaning is carried out according to the automatic control program.
The porous plate (flower plate) used for fixing the filter bag is arranged on the upper part of the box body. There is a jet pipe above each row of filter bags. A compressed air jet hole (nozzle) is opened on the jet pipe towards the center of each filter bag, and the other end of the spray pipe is connected with Pulse valve , control valve, etc Pulse control The system is connected with the compressed air storage tank, and the pulse injection soot cleaning is carried out according to the specified time or resistance value according to the automatic control program.
The filter bag mostly adopts the external filter type, and the inner side is provided with a supporting framework, and the dust is trapped and settled on the outer surface of the filter bag. At the moment of dust removal, when the high-speed jet air passes through the top of the filter bag, it can induce air several times as much as the amount of jet gas to blow into the inside of the filter bag together, forming air wave, which makes the filter bag produce rapid expansion and shock vibration from top to bottom, and has a strong dust removal effect. The pulse period can be adjusted from one minute to several minutes.  
According to the flow direction of the pulse injection air flow and the purified air flow, there are three ways: forward injection, reverse injection and opposite injection. In the forward injection mode, the two airflow directions are the same, and the purified clean air is discharged from the bottom of the filter bag; the reverse spray mode is that the two airflow directions are opposite, and the purified clean air is discharged from the top of the filter bag; the opposite spray type actually divides the filter bag into two parts, half of which are opposite to each other, and the other half is sprayed forward.
In the process of blowing, the filter bags which are cleaned can't catch dust. Because the time of blowing is very short, and the filter bags are row by row, the dust catching operation can almost be regarded as continuous. Therefore, the off-line soot cleaning can be carried out by the separate chamber structure, or the on-line soot cleaning can be carried out without separate chambers. It has better dust cleaning effect and better pulse dust removal effect. Its intensity and frequency are adjustable. The ash removal is related to atmospheric pressure, venturi structure and whether the jet center line is consistent with the filter bag center line. When the filter bag is used, the better effect can be obtained. It is also effective for felt filter materials due to its strong ash removal effect. Felt filter material use also began to rise. Felt filter material, from the micro point of view, can be used for effective filtration, so its apparent filtration speed can be higher than that of textile cloth, so that the device can be miniaturized. The pulse injection device needs compressed air as energy. In the cold zone, the water vapor in the compressed air is easy to condense and affect the injection effect, so it is not suitable to be placed outdoors; if it is placed outdoors, corresponding technical measures should be taken to prevent condensation or freezing.
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Company name: Botou Kangyue environmental protection Co., Ltd. Company Address: huangtun, Siying Township, Botou City postcode: 062151 Tel: 0317-8346823 8295600 Fax: 0317-8285600
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