Bag-type dust collection and treatment project is a kind of high-efficiency and environmental protection
air purification technology,which is widely used in various industrial fields to treat the dust,smoke and other pollutants
produced in the production process.
BAG filter is a kind of equipment that uses filter material (usually bag) to filter and remove dust.
Through interception, collision, diffusion and electrostatic effect,the solid particles in the air are trapped on the
surface of filter material,so as to achieve the goal of purifying the air.
The technology has the advantages of high dust removal efficiency,stable operation and convenient maintenance,
and is one of the important means of industrial waste gas treatment.
The following will be from our bag-type dust collection solution principle,process and application of the
three areas of detailed introduction.
1、Principle
The working principle of bag filter is mainly based on the filtering effect of filter material.
When the dust gas through the bag, the dust particles are retained in the bag surface,and the clean air
is discharged through the bag pores.
This process mainly depends on the physical characteristics and structure of the bag material,as well as the
characteristics of dust particles in the airflow.
The dust removal efficiency of bag filter is affected by many factors, including bag material,air velocity,
dust concentration, dust cleaning method, etc.
The dust removal process of bag filter involves many negative effects,including sieving effect, inertial collision effect,
hook effect, diffusion effect, gravity settling effect and electrostatic effect.
These effects work together to form a thick layer of dust particles on the surface of the bag,That is,"Primary adhesion layer”or“Second filter layer”, further improve the dust removal efficiency.
2、Process flow
The technological process of bag-type dust collection treatment project
usually includes the following steps:
2-1、Pre-treatment
Dust-containing gas first into the pre-treatment system, cyclone, inertial separator
and other equipment to remove larger particles and impurities,reduce the burden of subsequent bag filter.
2-2、Filter dust
After the pre-treatment of gas into the filter room bag filter.
Under the filtering action of the cloth bag, the fine dust particles in the gas are trapped on the surface of
the cloth bag,and the clean air is discharged through the pores of the cloth bag.
2-3、Dust cleaning treatment
With the accumulation of dust on the bag surface,bag permeability gradually reduced, dust removal
efficiency will be affected.
Therefore, it is necessary to clean the bag regularly.
Cleaning methods usually include mechanical beating, pulse blowing, etc. ,the purpose is to shake off the dust
layer on the surface of the bag or blow down,to restore the air permeability of the bag.
2-4、Discharge and post-treatment
The clean air treated by BAG filter can be discharged directly into the atmosphere.
If further reduction of emission concentration or removal of specific pollutants is required,post-treatment
systems such as activated carbon absorbers, wet electrostatic precipitators can also be set up.
3、Application area
Bag-type dust collection engineering has a wide range of applications,
mainly including but not limited to the following aspects:
3-1、Coal industry
In the coal processing, combustion and flue gas treatment process,will produce a large number of coal dust
and smoke and other solid particles.
The bag filter can effectively purify these exhaust gases,reduce the emission concentration and meet
the environmental requirements.
3-2、Chemical industry
There are many kinds of gaseous and solid pollutants,such as acid fog, ammonia, benzene
and other harmful substances.
BAG filter can capture these pollutants, reduce their emissions, improve environmental quality.
3-3. Building materials industry
In the processes of cement production, ceramic processing, glass manufacturing, etc.,a large amount
of dust and smoke will be generated.
Bag filter can reduce the emission of these exhaust gases, protect the environment and human health.
3-4、Building materials industry
In the cement production, ceramic processing, glass manufacturing process,will produce a large number
of dust and smoke.
BAG filter can reduce the emission of these gases, protect the environment and human health
3-5、Agricultural industry
In livestock breeding, food processing and other processes,will produce a lot of organic gas and dust.
The bag filter can remove these pollutants,reduce environmental pollution and improve the production environment.
3-6、Automobile manufacturing industry
In the process of painting and surface treatment,there will be paint mist and volatile organic compounds
(VOCs) and other harmful substances.
The bag filter can reduce the discharge of these pollutants and improve the safety of production environment.
3-7、Iron and steel industry
In the process of iron and steel smelting,there will be a lot of dust and smoke and other pollutants.
BAG filter can effectively capture these pollutants,reduce industrial emissions, protect the environment
and human health.
3-8、Power industry
Coal-fired power generation, thermal power generation and other processes will produce a large number
of flue gas and waste gas.
The bag filter can remove the solid particles and micro-dusts, and reduce the impact on the environment.
