Airtight filter bag: the filter bag is used together with the auxiliary filter, and the liquid is squeezed through the filter bag by using the system fluid pressure to achieve the purpose of filtration.
The filter bag has the advantages of fast flow rate, large processing capacity and long service life.
Filter bag artesian open filtration: the filter bag is directly connected to the pipe through the fitting joint, and the filter must be filtered by the differential gravity pressure of the fluid.
Its remarkable characteristic is that it does not need equipment investment, and the filtration is simple and feasible.
Filter bag filter is a dry dust filter device.It is suitable for collecting fine, dry and non - fibrous dust.
The filter bag is made of textile filter cloth or non-textile felt. The filter bag USES the filtration effect of fiber-dimensional fabric to filter the dust and gas.
Falling into the dust hopper, the gas containing fine dust is trapped when passing through the filter material, so that the gas body can be purified.Filter bag generally new filter material dust removal efficiency is not high enough.
After the filter material is used for a period of time, a layer of dust accumulates on the surface of the filter bag due to screen, collision, retention, diffusion, static electricity and other effects.
This layer of dust is called the first layer. In the process of movement after this, the first layer becomes the main filter layer of the filter material.
Depending on the effect of the initial layer, the filter material with larger mesh can also obtain higher filtration efficiency.With the accumulation of dust on the surface of the filter material,
the efficiency and resistance of the filter material increase correspondingly. When the pressure difference between the two sides of the filter material is very big,
Some of the fine dust particles that have been attached to the filter material will be squeezed in the past, making the efficiency of the dust collector decreased.
In addition, the high resistance of the filter makes the air volume of the system decrease significantly.Therefore, after the resistance of the dust collector reaches a certain value,
the dust should be cleaned in time.The primary layer should not be destroyed during ash removal, so as to avoid the decrease of efficiency.
The structure of filter bag is mainly composed of upper box, middle box, lower box (ash bucket), ash removal system and exhaust flying mechanism.The performance of filter bag filter,
in addition to the correct selection of filter bag materials, dust removal system on the bag filter plays a decisive role.
Therefore, the dust removal method is one of the characteristics of the bag dust collector, and it is also an important part in the operation of the bag dust collector
The dust collector enters from the lower part of the box according to the arrangement of dust-containing air, while the outlet is arranged on the upper part of the box,
the same side as the inlet.At this time, the lower part of the filter bag and the part opposite to the outlet, the airflow will be stagnant, because the box wall cooling, easy to condensation.
In order to reduce the heat dissipation of the wall surface, it is designed as a special form of reinforcing rib structure on the inner side of the box.Environmental protection asbestos - free gasket and sealing material should be selected to withstand the set temperature.
Many customers think that the discharge concentration and filtration accuracy of the bag filter is the same, in fact, there is a big difference.Dust removal equipment,
like the dust removal mechanism of mask, is realized by mechanical interception of fly ash particles in the flue gas by the filter material.
But in addition, the first received fly ash particles on the surface of the filter material also formed a layer of stable dense ash layer (commonly known as filter cake or filter bed), it also played a very good filtering role, especially with woven cloth as filter bag dust removal equipment, this layer of filter bed played a main filtering role.