With the strengthening of environmental protection consciousness, people has stricter requirements for the pollution gas discharged to the air by the enterprises. Thebag type dust collector is a highly efficient dust removal equipment for air pollution control. Bag type dust removing device has the advantages of stable operation, a wide range of applications. The dust discharge concentration can be less than 10mg/m³. Due to these advantages, it has been used in many enterprises. But with the popularization of bag filter, the dust explosion accident of bag type dust collector also occurred often. Therefore, the design of the bag filter is imperative, and is becoming stricter.

 Dust containing gas combustion and explosion must also have the following three conditions: first the explosion concentration is within the range of explosion limit; second the oxygen content is more than 13%; third the ignited flame may exit intense heat source.

  Bag type dust collector is used in combustible dust. In the design, we should take effective measures to inhibit the production of these three conditions that is to reduce the sensitivity of the system to the explosion, reduce the possibility of explosion. Design measures are to reduce the explosion hazard degree to the safety level when the measures to prevent the occurrence of the explosion are difficult to work out, so that the explosion caused no casualties, the device can be used within a short time after the explosion.

In addition, the operator can process the safe operation for the equipment, which is also the key to prevent dust explosion, so strengthening the personnel management is particularly important. It’s required to provide the theoretical knowledge training for the operators, make the operations staff aware of the dust explosion hazard and how to effectively suppress dust and anti-explosion, strengthen the labor discipline, pay attention to operation of the bag type dust collector, prohibit the electric welding, gas cutting operation and fire into the dust during the operation of bag type dust collector.