Dust filter bag is composed of bag body, bag mouth, expansion ring, rubber ring and bag bottom.
Let's take a look at the dust filter bag according to the material classification:
Common classification of dust filter bags
1. Bottom temperature category: use temperature below 120℃, instantaneously 150℃
1. Polyester 729 polyester filter cloth;
2. Polyester 208 flannel;
3. Polyester needle felt;
4. Antistatic needle felt (for coal mill);
5. Water and oil proof needle felt (for dust removal parts with high moisture content);
6. Coated needle felt, etc.
2. Medium temperature category: the use temperature is above 150℃, the highest is 220℃
1. Composite needle felt;
2. Aramid composite needle felt;
3. Polyamide composite needle felt;
4. Acid and alkali resistant composite needle felt.
Three, high temperature category: use temperature above 240 ℃, 320 ℃ instantly
1. Silicone oil glass fiber dust cloth;
2. Graphite fiberglass dust cloth;
3. Glass fiber needled felt;
4. Composite glass fiber felt, etc.
Dust filter bags are classified according to surface treatment
1. Burning and pressing treatment: After this treatment, the surface of the dust removal filter bag will have the unparalleled advantages of ordinary singeing and calendering treatment, which not only improves the dust removal performance of the dust removal filter bag, but also strengthens the dust removal filter bag to fine dust. collect.
2. Antistatic treatment: some dust will explode when meeting sparks at a certain concentration. Therefore, needle-punched felt dust filter bags with antistatic treatment should be used for flammable and explosive dust. The antistatic dust filter bag refers to the conductive fiber mixed with the raw material fiber of the dust filter bag. This fiber can choose binary conductive fiber, graphite wire conductive fiber and stainless steel conductive fiber. After this treatment, the dust filter bag will have conductive properties. .
3. Water-proof and oil-proof treatment: The raw material of the dust-removing filter bag is treated with fluorocarbon resin and PTFE impregnated oil-repellent and water-repellent treatment, which can prevent or reduce the phenomenon of sticking the dust filter bag when collecting moist dust.
4. PTFE coating treatment: When the particle size of the dust is less than 1 micron, or the dust is very viscous, or the gas-containing humidity is large, the dust filter bag of ordinary material cannot be effectively filtered. The coated dust filter bag with polytetrafluoroethylene film has high filtration accuracy, smooth surface, no dust adhesion, easy dust removal, and dust does not penetrate into the filter material.
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