Dust filter apparatus

Claim 1

IN APPARATUS FOR FILTERING RAW GAS CONTAINING FINE PARTICULATE MATTER, AND OF THE TYPE COMPRISISNG A FILTER CHAMBER HAVING A TOP WALL, SIDE WALLS AND AN OPEN LOWER END AND CONTAINING A SET OF FILTER BAGS SUBSTANTIALLY VERTICALLY SUSPENDED FROM SAID TOP WALL AND HORIZONTALLY SPACED APART BY PASSAGES TO PERMIT FREE PASSAGES OF SAID GAS THROUGH SAID BAG SET ON THE OUTSIDE OF SAID BAGS IN THE VERTICAL DIRECTION AND IN AT LEAST ONE HORIZONTA DIRECTION WITHIN SAID CHAMBER, SAID FILTER BAGS HAVING OPENINGS AT THEIR UPPER ENDS AND BEING CLOSED AT THEIR LOWER ENDS SUBSTANTIALLY ADJACENT SAID OPEN LOWER END OF SAID FILTER CHAMBER, AT LEAST ONE OUTLER CHAMBER ABOVE SAID TOP WALL AND COMMUNICATING WITH THE INTERIORS OF SAID BAGS THROUGH OPENINGS IN SAID TOP WALL AND THROUGH SAID UPPER ENDS OPENINGS FOR RECEIVING GAS FILTERED THROUGH THE WALLS OF SAID BAGS, MEANS FOR REVERSE FLUSHING SAID BAGS FROM THE INSIDE TO SEPARATE DEPOSITED FINE PARTICULATE MATTER FROM THEIR EXTERIOR SURFACES AT LEAST ONE BOTTOM CHAMBER HAVING SIDE WALLS AND ARRANGED BENEATH SAID FILTER CHAMBER AND CLOSING SAID OPEN LOWER END OF SAID FILTER CHAMBER AND HAVING AT LEAST ONE INLET FOR SAID GAS WHEREBY A GAS PRESSURE DIFFERENCE APPLIED BETWEEN SAID GAS INLET AND SAID OUTLET CHAMBER AND HAVING ITS LOWERMOST PRESSURE VALUE AT SAID OULET CHAMBER WILL ESTABLISH A FLOW OF GAS FROM SAID OUTLET CHAMCHAMBER INTO SAID BAGS AND THERETHROUGH TO SAID OUTLET CHAMBER, SAID BOTTOM CHAMBER HAVING AN OUTELET FOR PARTICULATE MATTER SEPARATED FROM SAID FILTER BAGS BY SAID REVERSE FLUSHING THE IMPROVEMENT COMPRISING: PARTITION MEANS SEPARATING SAID BOTTOM CHAMBER INTO AT LEAST ONE INLET COMPARTMENT COMMUNICATING WITH PARTMENT, SAID INLET COMPARTMENT COMMUNICATING WITH SAID GAS INLET TO ESTABLISH AN INITIAL UPWARD FLOW OF SAID GAS THROUGH THE PASSAGES LOCATED SUBSTANTIALLY ABOVE THE SAID INLET COMPARTMENT, SAID OUTLET COMPARTMENT COMMUNICATING WITH SAID PARTICULATE-MATTER OUTLET FOR RECEIVING SAID SEPARATED FINE PARTICULATES, SAID INLET COMPARTMENT COMMUNICATING WITH SAID FILTER CHAMBER THROUGH A LIMITED PORTION OF SAID OPEN LOWER END OF SAID FILTER CHAMBER, SAID OUTLET COMPARTMENT COMMUNICATING WITH SAID FILTER CHAMBER THROUGH A REMAINING PORTION OF SAID OPEN LOWER END OF SAID FILTER CHAMBER, WHEREBY SAID INITIAL UPW RD SAID GAS FROM SAID INLET COMPARTMENT PROGRESSIVELY DIVERGES LATERALLY AND THEN DOWNWARDLY IN SAID PASSAGES ABOVE SAID OUTLET COMPARTMENT TO CARRY SAID SEPARATED PARTICULATE MATTER FROM THE PASSAGES ABOVE SAID INLET COMPARTMENT INTO THE PASSAGES ABOVE SAID OUTLET COMPARTMENT, SAID PARTITION MEANS ESTABLISHING SUBSTANTIALLY NO FLOW CONDITIONS IN SAID OUTLET COMPARTMENT TO ALLOW SAID PARTICULATE MATTER TO SETTLE BY GRAVITY WITHIN SAID OUTLET COMPARTMENT.