公开(公告)号：DE19836859A1

公开(公告)日：2000-02-17

申请号：DE19836859

申请日：1998-08-14

Applicant: ABB RESEARCH LTD

Inventor： KWETKUS BERNHARD ANDREAS ,  NILSSON PETER

IPC: B01D46/00 ,  B01D46/04 ,  B01D29/66 ,  B01D46/02 ,  F01N3/021

Abstract: The tubular filters (7) are arranged in two separate chambers (11). Each can be subjected to a pressure pulse from the cleaned gas (B) side, without disconnecting the chamber from the flow of gas to be cleaned (A). An Independent claim is included for a method of filter cleaning. During operation, contaminants deposit inside the tubular filters. During the cleaning phase, a short pressure pulse from the clean gas side detaches the filter cake, which falls into the dust collection hopper (8). The main flow continues.

公开(公告)号：DE19757104A1

公开(公告)日：1999-06-24

申请号：DE19757104

申请日：1997-12-20

Applicant: ABB RESEARCH LTD

Inventor： KWETKUS ANDREAS DR ,  NILSSON PETER

IPC: B01D46/00 ,  B01D46/04 ,  B01D46/42

Abstract: Gas flow in the filter is radially outwards so that dirt accumulates on the inside of the bag from where it is removed as the top is closed and the bottom is opened to vacuum. The filter comprises rows of vertical tubular bags that receive raw gas into their upper openings. The bottom of each bag is open and projects into a chamber (8) which is isolated from the outside by a valve (12). Where all bags are to be cleaned simultaneously, in a batch-wise operation, the tops of the bags are closed, the valve is opened so that the chamber (8) is connected via a pipe (9) to a vacuum chamber (10) which is evacuated by a pump (11). The higher pressure of the clean gas in compartment (4) then causes a reverse flow and therefore cleaning. In a continuous operation each row of bags has its own pipe (9), and associated valve.