Several cleaning methods of bag dust collector are introduced in detail

During the filtration process of the bag filter, the ash particles will slowly accumulate on the surface of the filter material to form a layer of dust and ash, which needs to be cleaned. Ash cleaning is an important link and influencing factor to ensure the normal operation of the bag filter, and the common cleaning methods of the general bag dust collector include pulse jet cleaning, reverse blowing cleaning, mechanical vibration cleaning and manual knocking

Clause. 1. Pulse jet cleaning: when the high-speed jet air is used to flow through the top of the filter bag, it blows to the inside of the filter bag to form an air wave, so that the filter bag produces sharp expansion and impact vibration from top to bottom, and produces a strong effect of clearing dust.

There are mainly three ways: forward spraying, reverse spraying and counter-spraying. The pulse cleaning effect is strong, the ash cleaning effect is better, and the filtration wind speed can be improved. It is the best cleaning method for the current ash cleaning effect.

Clause. 2. Gas cleaning method: use high-pressure gas or external atmosphere to blow back the filter bag to vibrate and remove the dust on the filter bag.

This method includes three types: reverse air cleaning, pulse jet cleaning and reverse suction cleaning. Among them, the most commonly used is the reverse blowing ash cleaning method, which uses the atmosphere or fan to discharge the pipe to inhale gas and form a reverse air flow, and uses the reverse wind speed and vibration to make the deposited powder layer dust fall off.

This cleaning method is commonly used to weave cloth filter material or use filter viscous filter material, which is easy to remove dust. The cleaning effect of the back-blowing cleaning method is relatively weak, but the damage to the filter cloth is smaller than that of the vibration cleaning method, so some soft filter materials, such as glass fiber filter cloth, use this cleaning method.

Clause. 3. Mechanical vibrating and ash cleaning: use the mechanical device to periodically vibrate each row of filter bags, or shake the frame of the suspended filter bag, so that the filter bag vibrates and clears the dust, so as to remove the dust on the filter bag.

According to different filter bag materials, it is divided into two kinds of top rapping ash cleaning and middle vibration ash cleaning, the mechanical structure of this ash cleaning method is simple, the operation is reliable, but the ash cleaning effect is weak, and it is suitable for textile cloth filter bags.

Clause. 4. Manual beating: As the name suggests, it is to use manual slapping of each filter bag of the bag filter to shake off the dust to remove the dust on the filter bag. This method of cleaning ash wastes manpower and time costs, and has begun to be slowly eliminated.

The dust cleaning effect is not good, the filter bag resistance will rise, which will affect the dust removal effect, according to different industrial and mining conditions, different ash cleaning methods should be selected to achieve the best ash cleaning effect.

What are the cleaning methods of the bag filter?

When the bag is clogged, the resistance increases, which can be expressed by the increase in the reading of the differential pressure gauge. Bag blockage is the main cause of bag wear, perforation, falling off and other phenomena.

The causes of the blockage of the dust bag are checked and repaired in the table below. In general, the following measures are taken:

Temporarily strengthen the cleaning to eliminate the blockage of the bag;

Partial or total replacement of cloth bags;

Adjust installation and operating conditions.

Measures to prevent clogging of dust bags.

Phenomenon Check content measures.

Bag wetting Leakage of dust collector box and other parts Eliminate water leakage, drying, repeated cleaning of ash and dust dampness Find out the cause Eliminate the root cause and repair.

Insufficient tension of the cloth bag Suspension method Adjustment and maintenance.

The lower part of the cloth bag is blocked, the cause is identified, and the adjustment and maintenance are made.

Poor installation of cloth bag Installation method Adjustment and maintenance.

Poor ash cleaning 1. The ash hopper is not sealed.

2. The ash cleaning mechanism is faulty.

3. Insufficient air volume.

4. Insufficient injection pressure adjustment and maintenance.

Bag shrinkage Find out the cause Change the bag.

The filtration rate is too high and the air volume is adjusted.

Breakage of dust removal filter bags.

The shape of the bag and the installation method and mechanism of the bag determine the location where the bag is easy to break, so that it can be inspected and repaired. However, the bag is mainly damaged due to the following reasons, if the damage occurs, you can refer to the following table for inspection:

Cause Measure Cause Measure.

The cleaning cycle is too long Adjust and shorten the aging of the filter bag Find out and eliminate the cause The cleaning time is too long Adjust and shorten The filter bag hardens due to heat Find out and eliminate the cause of insufficient tension of the bag Adjust, strengthen Burn Re-study the filter bag material The bag is too loose Adjust the leakage dust Identify and eliminate the cause of poor bag installation Adjust and strengthen The filtration rate is too high Adjust and reduce the aging of the bag.

If it is mainly caused by the following reasons, it is necessary to investigate the cause, take elimination measures and replace the dust removal filter bag.

hardening and shrinkage due to abnormally high temperatures;

due to vapor contact reaction with acids, alkalis or organic solvents;

Reacts with moisture.

4. The filter cloth should not be hung too loose or too tight, too loose is easy to accumulate dust, too tight is easy to pull bad.

5. The old cloth bags of the new process should not be mixed to avoid the normal operation of the dust removal equipment due to different damage times.

6. Replace the cloth bag, blow it with compressed air first, and then check whether there are any holes, and leave them for replacement after the holes are repaired. If the cloth bag is covered with dust, rinse it with water, cool and dry it before leaving it to be replaced.

The single bag dust collector is widely used in dust removal in metallurgy, construction, chemical industry, mining, grinding workshop and other industries with compact structure, high dust removal efficiency and simple equipment use. What are its main cleaning methods? How is the dust removed?

The ash cleaning methods of the stand-alone bag filter mainly include mechanical rapping, pulse injection, mechanical backflushing and other ash cleaning methods.

Summary. There are generally two kinds of smoke and dust at the air outlet of the bag dust collector, one of which is continuous smoke and dust, which is because the filter bag of the dust collector is particularly damaged, and the filter bag is not firmly tied and falls off or the upper and lower hanging ports of the bag dust collector are not tight, resulting in dust leakage caused by the connection between the hanging mouth and the flower board, and between the pattern board and the pattern board. The second is that there is smoke and ash instantly, and although the dust removal filter bag has been damaged, it is not very severe, and it will cause instant smoke and ash when the bag dust is blown.

There are generally two kinds of smoke and dust at the air outlet of the bag dust collector, one of which is continuous smoke and dust, which is because the filter bag of the dust collector is particularly damaged, and there is also the filter bag binding is not firmly fixed and falls off the jujube book or the upper and lower hanging ports of the bag dust collector are not tight, resulting in dust leakage caused by the loose connection between the hanging mouth and the flower board socks, and the flower board and the flower board. The second is that there is smoke and ash instantly, and although the dust removal filter bag has been damaged, it is not very severe, and it will cause instant smoke and ash when the bag dust is blown.

When the bag filter is full of smoke and ash, we can judge according to the number of bits corresponding to the action of the electromagnetic pulse valve controller when the air outlet is dusty, and the dust filter bag can also be used to use a flashlight to view the filter bag that has leaked dust in the observation hole of the upper box body, or open the pulse controller after opening the cover, and find which venturi tube to ash from the bag filter during the blowing process, then which dust collector filter bag is leaking. The bag filter manufacturer Shiheng Environmental Protection reminds everyone: if you install or disassemble the dust bag, you must pay attention not to collide with the metal edges and corners of the bag filter, so as to avoid the dust bag from being injured.

Reason: There are two kinds of "smoke and dust" at the air outlet of the bag dust collector, one is continuous "smoke and dust", that is, due to the serious damage of the dust removal filter bag, the filter bag is not firmly tied and falls off, or the upper and lower hanging ports of the bag dust collector are not tight, and the connection between the upper hanging port and the flower board, the flower board and the vertical seepage plate of the dust bureau is not tight, and the dust leakage is made of fiber. The other is instantaneous "smoke and dust", which means that although the dust filter bag is damaged, it is not very serious, and there is an instantaneous "smoke and dust" when the bag filter is sprayed.

Because when most of the dust filter bags are damaged, they should all be replaced, and the dust removal bags should be replaced when the dust collector stops working, at this time, the ash cleaning controller should be closed, and the manhole door at the top should be opened, and the bag can be removed. When looking for the cause of "smoke and dust" of the bag filter, you can judge which dust filter bag leakage is eliminated according to the number of digits corresponding to the operation of the electromagnetic pulse valve and pulse controller when the air outlet is "smoke and dust". The upper cover bag dust collector can also use a flashlight to detect the filter bag leaking from the observation hole of the upper box; Or open the upper cover and then open the pulse controller, and find out which venturi tube "smokes and dust" from the injection process, which is the dust leakage from the dust removal filter bag.

Then, deal with it according to the problem that arises. Because when most of the dust filter bags are damaged, they should be replaced, and the dust bag should be replaced when the dust collector stops working, and the ash should be cleaned at this time.