How to choose a bag filter according to the cleaning method?

A dust collection hood is set up in each ash place, and the dust-containing gas is transported to the dust removal device through the pipeline gas path, in which the dust is collected in the dust removal device after the gas-solid separation is carried out, and the clean gas is introduced into the main pipe or directly discharged into the whole set of equipment into the atmosphere, that is, the dust removal system, and the dust collector is an important part of the system. From the perspective of ventilation and dust removal, dust is all solid small particles that can float in the air for a long time, and is a dispersion system, called aerosol, in which air is the dispersed medium and solid particles are the dispersed phase. A dust collector is a device that separates these small solid particles from aerosols.

There are three commonly used cleaning methods for dust collectors:

1.Gas cleaning: Gas cleaning is to use high-pressure gas or external atmosphere to blow back the filter bag to remove the dust on the filter bag. Gas cleaning includes pulse jet cleaning, reverse air cleaning and reverse suction cleaning.

2.Manual beating: It is to manually pat each filter bag to remove the dust on the filter bag.

3.Mechanical Rapping Ash Cleaning: It is divided into top rapping ash cleaning and middle vibration cleaning (both for filter bags), which is to use the mechanical rapping device to periodically vibrate each row of filter bags in turn to remove the dust on the filter bag.

Particle layer dust collector: It is an internal filter dust removal device that uses silica sand, gravel, slag, coke and other granular particles as filter material to remove dust particles in dust-containing gas. Mainly rely on sieve filtration, inertial collision, interception and diffusion, etc., so that the dust adheres to the particle filter material and the surface of the dust particles.

The filtration efficiency increases with the thickness of the particle layer and the thickness of the dust layer on it, and the pressure loss also increases.

The commonly used ash cleaning methods are: mechanical vibration ash cleaning, reverse blowing spike ash cleaning and pulse jet cleaning.

Mechanical vibration type and reverse blowing type ash cleaning belong to intermittent ash cleaning, that is, the dust collector is divided into a pin family to eliminate the filter room, and the gas path is cut off room by room to clean the ash in turn, this method has no dust escape in the ash cleaning process, and can obtain a higher dust removal efficiency.

Pulse jet cleaning belongs to continuous cleaning, that is, it does not cut off the air path, and continuously cleans a part of the filter bag. The pressure loss is stable during continuous cleaning, which is suitable for handling high concentrations of dusty gases.

There are several ways to clean the pulse bag filter:

1.Manual cleaning: When the dust collector is shut down or stopped in the middle of operation, the operator manually blows back the filter bags one by one.

2.Mechanical Vibration Cleaning Cleaning: The larger pulse bag filter will have its own rapper, which can be mechanically vibrated or cleaned to shake off the ash in the bag, so as to achieve the goal of cleaning the filter bag.

3.Pulse back-blowing cleaning: The conventional cleaning method of the pulsed bag type hidden and buried dust device is to blow back the filter bag through the pulse valve.

In the short air flow up and down the filter bag, the dust particles that accumulate on the surface of the filter bag will shake off, and the collection device can clean up the dust.

1?Reverse spray low-pressure pulse in this orange punch? Low-pressure injection, blowing air flow and filtered clean air in the bag.

The flow direction is reversed, and the clean gas is discharged from the upper clean gas box?

2?Reverse injection high-pressure pulse? High-pressure injection, blowing air flow and filtered clean air in the bag.

The flow direction is reversed, and the clean gas is discharged from the upper clean gas box?

3?Spray low-pressure pulses? Low-pressure injection, blowing air flow and filtered clean air in the bag.

The flow direction is the same, and the clean gas is discharged from the lower clean gas joint box?

4?Spray high-pressure pulses? High-pressure injection, blowing air flow and filtered clean air in the bag.

The flow direction is the same, and the clean gas is discharged from the lower clean gas joint box?

5?Spray low-pressure pulses? Low-pressure injection, the jet air flow is shot from the top and bottom of the filter bag at the same time.

in, the clean gas is discharged by the clean gas joint box?

6?Spray high-pressure pulses? High-pressure injection, the jet air flow is shot from the top and bottom of the filter bag at the same time.

in, the clean gas is discharged by the clean gas joint box?

7?Annular low-pressure pulses? Low-pressure injection, using the inverse of an annular spray injector.

Spray pulse? 8?Annulus high-pressure pulses? High-pressure injection, using the inverse of the annular gap injection injector.

Spray pulse? 9?Split chamber low-pressure pulses? Low-pressure injection, sub-chamber structure forest group, according to the procedure chamber by room spraying.

Ash, but the jet air stream is only sprayed into the clean air box, not directly into the filter bag?

10?Long bag low pressure pulse? Low-pressure injection, reverse injection of more than the length of the filter bag.

Pulsed.

1.The high-pressure fan blows back to clean the ash.

2.Compressed air pulse cleaning.

The above two belong to the most widely used ash cleaning methods.