(JET BAG FILTER)                          
 
The Jet Bag Filter has so many advantages that demand is steadily growing
 
Features :
  • Heavier load of the filter.
  • Longer useful life of the filter sleeves.
  • Energy saving through return of filtered air.
  • Compact form, therefore small area required and reduced filter height..
Operation :

The dust - laden gases enter the pre-separation plenum (1) where they meet the low baffle plate (2) The baffle wall protects the sleeves against the direct flow. The air velocity is reduced in the pre-separation plenum. The coarse dust fraction leaves the air flow and falls into the dust collection hopper (3) The gas laden with the fine remaining dust enters the filter plenum (4) after deflection by the baffle plate. The sleeves (6) fitted over supports. (5) receive the flow in the outside. The fine dust is deposited on the outside of the filter sleeves. The air penetrates through the filter fabric into the inside of the sleeves and rises into the clean air plenum. (7) From here it can either be led out of the doors. (8) or returned to the workshop (9).

The control of the cleaning process for the filter sleeves depends either on the differential pressure or an infinitely variable electronic timer. The dust particles clinging to the filter sleeves are removed through short, sharp compressed air impacts. Compressed air at 4-6 bar shoots out of electronically activated diaphragm valves into the corresponding opened distribution line and from there into the jet nozzles. The compressed air reaches a speed close to that of sound in the jet nozzles. The volume of the air sucked in is much larger than that of the compressed air. The cleaning stream causes a strong counter pressure in the sleeve. The sleeve, which until then was pressed against its support, is suddenly extended to its full size (10). The particles of dust are blown off. Small dust particles, which had penetrated the filter fabric, are loosened by the short, but strong cleaning flow, and pressed back to the dust-laden side.

When the diaphragm valves have closed the cleaned filter sleeves are once again ready for the normal filter process. All rows of sleeves are cleaned in a fixed sequence. The cleaning time is so short that practically always the whole filter surface of the filter is available. Moreover the flow volume is the same up-and down-line of the filter.

The compressed air impacts are controlled by an electronic timer. Impact and regularity can be continuously set with the electronic timer, depending on the type and amount of dust.

 
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