Causes of excessive dust emission caused by dust filter bags

Environmental protection dust filter bags 

Excessive dust emission

The basic reasons for the excessive dust emission: 1. The initial layer on the surface of the filter bag is not enough; 2. The filter bag is damaged; 3. The filter bag is poorly assembled; they are described as follows:

1. The initial layer on the surface of the filter bag is not enough

During the operation of the precipitator, if the discharge exceeds the standard and the operating pressure of the precipitator is too low, it is very likely that the initial powder layer on the surface of the filter bag is insufficient. The reason may be that the filtration speed of the filter bag is too high and the The cleaning cycle is too short, the pressure of blowing compressed air is too high, and the loadability of dust is reduced.

Studies have shown that: too high filtration speed, the dust discharge rate will increase, too high filtration air speed, the initial dust layer will be broken, and the dust will impact the filter bag and cause excessive wear, if the cleaning frequency of the filter bag is too high at this time. It is very easy to cause the fabric of the filter bag to loosen, which will cause the dust collector to discharge excessively.

When setting the pulse cleaning cycle of the dust collector, it is better to ensure that the dust collector works under stable pressure and the set pulse cleaning cycle time is the longest. The pulse cleaning time can ensure that the initial dust does not fall off, and the set time The shortest cleaning is better. If the initial dust layer is insufficient, the cleaning cycle can be extended to make up for it. If the differential pressure control is used, the stability of the inlet and outlet pressure setting of the dust collector can be improved.

If the excessive discharge of the dust collector occurs only after cleaning the filter bags, it is only necessary to check whether the pressure of the compressed air for the pulse cleaning is too high.

The reduction of dust load may be caused by the reduction of productivity, or caused by the maintenance and adjustment of the control system of the dust collector. The solution: it can be solved by slowly starting to lift the load with a light load or by pre-coating dust.