Industrial Dust Collector Bag

Industrial Dust Collector Bag

Dust collector bag, also known as dust bag or dust filter bag, is the core filtration components of bag filter, mainly used in cement, steel, electric power, chemical industry and other dust and gas purification treatment industrial . It usually adopts cylindrical structure hanging vertically inside the dust collector, the material covers polyester, polypropylene, aramid, PPS, P84, glass fiber composite and other fiber materials, according to the temperature adaptability is divided into high-temperature, medium-temperature and normal temperature series.

In the industrial dust removal system, dust bag seems to be a simple filter element, but it bears the core function of "dust capture, system stabilization and environmental compliance". From workshop air quality to equipment life, from production efficiency to environmental compliance, its role permeates every aspect of industrial production. It is to determine the effectiveness of the dust removal system "heart parts".

Dust filter bag is the core component in the field of industrial environmental protection, and its performance directly affects the effect of dust management. As the "heart" of the bag filter, the filtration efficiency of the new bag is about 99%, and the formation of the initial layer of dust after use can increase the efficiency to 99.9%. A power plant after the use of membrane filter bag, the system differential pressure stabilized at 800Pa operation, service life extended by 60% and dust capture efficiency of 99.99%.

The most central role of the dust collector bag is to efficiently filter dust of different particle sizes through the porous structure of the fiber material, and this process is divided into three layers:

1. Surface interception of coarse particles：The fiber network on the surface of the bag (pore size 10-50μm) can directly block coarse dust with a particle size >10μm,such as cement particles, wood chips, with an interception efficiency of more than 95%. These particles are attached to the surface of the bag under the impact of airflow, forming the initial dust layer ("initial layer"), laying the foundation for subsequent filtration.
2. Deep filtration of fine dust：For 1-10μm fine dust, such as coal dust, metal oxides, simple surface interception is difficult to work. At this time, the three-dimensional fiber structure inside the bag (porosity 70% -80%) through inertial collision, diffusion adsorption and other roles, the fine dust is firmly locked in the fiber gap. High-quality PTFE laminated bag on the 0.3μm dust capture efficiency of up to 99.99%, far more than ordinary filters.
3. Ultra-fine dust filtration：In waste incineration, chemical industry and other industries, the bag needs to deal with ultra-fine dust <2.5μm, containing heavy metals, dioxins and other toxic substances. Through the coating treatment (membrane pore size 0.1-0.5μm), the bag can control the emission concentration of this kind of dust below 5mg/m³, which is the key to solve the industrial PM2.5 pollution. After a waste incineration plant used PPS laminated bags, the emission of ultrafine dust decreased by 80% compared with traditional filter media.

Dust filter bag effectively filters dust particles in the air through the interception of fiber materials,and applicable to chemical industry, metallurgy, building materials, cement, electric power and other industries, to prevent the dust from abrasion and clogging of production equipment.

High-temperature type dust collector bag, such as P84, PTFE, glass fiber, can withstand high temperature above 200℃. It is widely used in metallurgy, smelting, garbage incineration and other high-temperature flue gas treatment scenarios, to ensure safe operation of equipment.

In the process of aluminum electrolysis, rare metal smelting, the dust collector bag can recover fine particles, improve the utilization rate of resources, and reduce environmental pollution at the same time. Some dust filter bag, such as PTFE, DWD material, has anti-static function, which can eliminate static sparks and reduce the risk of explosion in chemical, pharmaceutical and other flammable and explosive industries.

The role of dust bag has long exceeded the simple "filtration". It has became a balance point of industrial production environmental protection, efficiency and cost. Selecting the appropriate filter bag, not only can realize the dust emission standards, but also create direct economic benefits for enterprises. As the "first line of defense" for industrial cleanliness, it will play a more and more critical role under the promotion of environmental friendly target.