Anti-static filter bag for coal washing plant dust collector

Washing plant dust collector filter bag

The bag dust collector in the coal washing plant is mainly used in the dust removal equipment in the coal mining field and the coal selling field, its main role is to collect the dust in these places, and through improvement at the time of design, the structure of the dust collector in the coal washing plant is optimized and the progress of energy saving.

The dust bag in the dust collector in the coal washing plant is the filter material, which avoids the explosion of pulverized coal caused by static electricity. Ash hopper adopts heat preservation measures or heat tracing measures. The normal operation of the dust collector is ensured.

In addition to the process of producing ordinary needle felt, the production of polyester dust bag also requires the incorporation of conductive fiber yarn in the warp of the base cloth for the production of needle felt or the mixing of conductive fiber and other conductive materials in the chemical fiber.

Technical parameter

Name: Polyester needle felt

Material: nylon fiber/polyester conductive base cloth

Gram weight: 450~600g/㎡

Air permeability: 80~100m3/㎡/s

Tensile force: 1000~1500N/5×20cm

Weft pull: 1300~1600N/5×20cm

Warp elongation: < 35%

Zonal elongation: < 55%

Resistance surface: 4.8YX10

Volume: 8.7

Maximum friction potential: 250 V

Uniform value: 183

Surface electric nuclear density mc/㎡ : 3.4

Operating temperature: ≤130℃

Filter wind speed: 1.0~1.2m/min

Post-treatment: singeing, calendering or Teflon coating

Polyester needle felt bag working principle: The product is made of textile filter cloth or non-textile felt, using the filter effect of fiber fabric to filter the dust-containing gas, when the dust-containing gas enters the bag dust collector, the dust with large particles and a significant ratio settles down because of the action of gravity, and falls into the ash hopper, the gas containing finer dust is blocked and negative gas when it passes through the filter material Purify. General new filter material dust removal efficiency is not high enough. After the use of filter material for a period of time, because of screening, collision, retention, diffusion, electrostatic and other effects, the surface of the filter bag contains a layer of dust, this layer of dust is called the first layer, in the process of movement after this, the first layer has become the main filter layer of the filter material, relying on the role of the first layer, the filter material with larger mesh can also obtain higher filtration efficiency.

General industrial dust in the concentration of the degree (that is, explosion) in the case of electrostatic discharge sparks or external ignition and other factors, easy to lead to explosion and fire.

For example, face dust, chemical dust, coal dust, etc. have the possibility of explosion in case of electrostatic discharge. In the field of bag dust removal, such as these dust need to be collected by cloth bags.