The working principle of the bag filter turns out to be like this

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.

Bag filter is a common air purification equipment, its basic working principle is to use the bag filter material to filter the solid particles in the air, discharge the clean air, and at the same time concentrate the dust particles collected or reuse. Its main workflow is as follows:

1.The air flows through the preprocessor for preliminary filtration to remove larger particles from the air, and the preprocessor can take many forms, such as cyclones, inertial separators, etc.

2.Entering the bag filter room, the air is filtered by the bag material, and the fine dust and smoke suspended in the air are trapped on the surface of the bag, and the clean air flows out from the pores of the filter material in the bag.

3.Dust accumulates on the surface of the bag, which will cause the bag to clog over time and reduce filtration efficiency, so the dust accumulated in the dust collector needs to be cleaned regularly.

4.When cleaning the ash, it is necessary to shake the bag or blow back with compressed air to make the accumulated dust particles leave the surface of the bag and fall into the dust collection tank.

5.The discharge port of the dust collector enters the post-processor, such as activated carbon adsorber, wet electrostatic precipitator, etc., to further purify the air to meet environmental protection requirements.

Bag filter has the advantages of high dust removal efficiency, long service life and convenient maintenance, and is widely used in pharmaceutical, food, chemical, cement and other industries.

1. The working principle of the bag filter: The bag filter mainly uses filter material (fabric or felt) to filter the dust-containing gas to achieve the purpose of dust removal. The filtration process is divided into two stages, the first is that the dusty gas passes through the clean filter material, and the main thing that plays a filtration role at this time is the retention of the filter material fibers.

2. Secondly, when the retained dust continues to increase, part of the dust is embedded into the filter material, and part of it is covered on the surface of the filter material to form a dust layer, which mainly relies on the dust layer to filter the dust-containing gas. After the dust-containing gas enters the dust collector, the airflow velocity decreases, and the larger particles in the smoke and dust directly precipitate to the ash hopper, and the rest of the dust particles pass through the filter bag from the outside to the inside for filtration, and the clean flue gas is discharged from the inside of the filter bag, and the fly ash is blocked on the outside of the filter bag.

3. With the continuous accumulation of dust, the pressure difference between the inside and outside of the dust removal filter bag gradually increases, when the pressure difference reaches the set value, the pulse valve diaphragm automatically opens, and the pulse air is sprayed into the filter bag through the nozzle, and the filter bag expands, so that the dust attached to the filter bag falls off and achieves the effect of dust removal.

Nowadays, many families will use a bag filter to clean the room, and the use of a bag filter to clean the room can make the indoor cleaning work more thorough. The bag filter can effectively capture impurities, dust and particulate matter, etc., so that the indoor space can not leave dead corners, and make people's living environment more clean and healthy. In order to understand the performance characteristics of the bag filter more specifically, the following is an introduction to the internal structure of the bag filter.

The internal composition of the bag filter is composed of the upper box, the middle box and the lower box, the ash cleaning system, the ash discharge system and other structures, so the internal structure of the bag filter is relatively simple. In order to make the bag filter more efficient when working, you need to pay attention to choosing a high-quality bag filter to buy. When choosing a bag filter, on the one hand, it is necessary to choose the material of the filter bag, and at the same time, it is also necessary to pay attention to whether the performance of the ash cleaning system is superior, because the quality of the ash cleaning system directly affects the work efficiency of the dust collector.

The working principle of the bag filter is mainly to use organic fibers or inorganic fiber fabrics to form a filter layer, the bag filter is continuously adsorbed on the outer surface of the filter bag in the process of work, the powder layer will begin to thicken, and the resistance value of the bag filter will also increase, after the resistance value increases to a certain extent, the pulse valve diaphragm will issue a command, and the pulse valve will be opened when the left and right are submerged, so that the compressed air in the high-pressure air bag will begin to flow smoothly. If there is no dust inside the baghouse, the baghouse will stop working.

There are many classifications of bag filters. If it is distinguished according to the shape of the filter bag, it can be divided into two types: flat bag and round bag, and if it is distinguished according to the air outlet mode, it can be divided into three types: lower air inlet and upper air outlet, upper air inlet and lower air outlet and DC type. If it is distinguished according to the filtration method, the bag filter can be divided into two types: external filter type and internal filter type.

These different types of baghouses have different manufacturing techniques and material selections, so the work efficiency that can be achieved is also different.

Through the above content, we can understand the internal structure characteristics of the bag filter, as well as the working principle and product classification of the bag filter. When consumers buy bag filters, they can choose to use them in combination with the performance characteristics of different types of bag filters.

With the repeated attachment of the powder to the outer surface of the filter bag, the powder layer continues to thicken, and the resistance value of the bag filter also increases. The pulse valve diaphragm sends out a command, the pulse valve is opened when the left and right are submerged, the compressed air in the high-pressure air bag is passed, and if there is no dust or it is small to a certain extent, the mechanical ash cleaning work will stop working.

The gas purification mode of low-pressure pulse bag filter is external filter type, and the dusty gas enters the filter chamber of each unit through the diversion pipe, and the vertical distance between the bottom of the filter bag and the upper mouth of the air inlet in the design has sufficient and reasonable air flow through appropriate diversion and natural flow direction distribution, so as to achieve uniform air distribution in the entire filter room.

The particle dust in the dust-containing gas falls directly into the ash hopper after being separated by natural sedimentation, and the rest of the dust enters the filter area of the middle box with the air flow under the guidance of the diversion system, and is adsorbed on the outer surface of the filter bag. The filtered clean gas is discharged through the filter bag through the upper box and exhaust pipe.