Like the rest of DISA’s dust collection systems, these units are built to be exceptionally rugged and ready for heavy duty applications. The pulse jet timer is field-adjustable for pulse duration and interval.
Air pollution problems are unique and need customised system design to suit the particular application.
In the V entry design, the dirty gas enters the inlet plenum. It then flows down to both the modules; and undergoes filtration as in the regular unit. The clean gas passes through the outlet plenum from the individual clean air chambers, and then flows out through the outlet duct to the ID fan.
In the DJC series, the dirty gas enters the casing into a central chamber formed by perforated sheets. The gas flow toward the bags is from a lateral direction ensuring the separation of heavier dust and a better gas distribution respectively. The lighter dust gets carried upward to the bags. For some applications, such as Boiler fly ash, a perforated sheet at the face of gas entry is employed for uniform distribution of incoming gas.
As the cement industry has begun to establish bigger plants, conventional bag filters have been found to be inadequate to handle large gas flows in excess of 500,000 m3/hr. This is due to severe limitations such as high gas flow per bag, high velocity of gases through the bag filter, higher pressure drop across filters, high space requirement due to bigger size filters and high compressed air consumption.
To overcome these drawbacks, DISA has introduced the DJD series. In this design the dust separation takes place partially due to impact on the baffle and further through filter bags thus reducing the filtration load on the bags.