Global Patent Index - EP 0971782 A1

EP 0971782 A1 2000-01-19 - REVERSE PULSE CLEANING ENHANCEMENT FOR CARTRIDGE FILTER AIR FILTRATION SYSTEM

Title (en)

REVERSE PULSE CLEANING ENHANCEMENT FOR CARTRIDGE FILTER AIR FILTRATION SYSTEM

Title (de)

REINIGUNG MIT UMGEKEHRTEN PULSIERUNGEN FÜR PATRONENFILTER-LUFTFILTERSYSTEM

Title (fr)

AMELIORATION DU NETTOYAGE A FLUX PULSE INVERSE DANS UN SYSTEME DE FILTRATION D'AIR DANS UN FILTRE A CARTOUCHE

Publication

EP 0971782 A1 (EN)

Application

EP 98908510 A

Priority

  • US 9802550 W
  • US 79943097 A

Abstract (en)

[origin: WO9834713A1] The present invention provides a filter apparatus for use in air pollution control which includes at least one hollow filter cartridge disposed within a housing cabinet. Contaminated air is introduced into the housing cabinet through an inlet and is caused to flow into an exhaust chamber adjacent the housing cabinet after passing through the filter cartridges in the housing cabinet to remove airborne particulates. Compressed air injectors are also provided for selectively directing a reverse pulse of air into the openings of the filter cartridges from the exhaust chamber side thereof so that the reverse air pulse enters the filter cartridges and flows through the filter medium in the reverse direction of that of the contamined air flow to thereby remove accumulated contaminates from the filter medium. In order to improve periodic cleaning of the filters, elongated deflecting inserts are disposed within the filter cartridges to reduce the internal volume of the filter cartridges. The compressed air injectors include preferably tapered nozzles positioned and aligned with a corresponding opening such that the reverse air pulses can deflect off of the inserts disposed within the walls of the filter cartridges and, as a result, against substantially the entire interior surface of the filter medium so as to effect even cleaning of substantially the entire length of the filter assembly.

IPC 1-7 (main, further and additional classification)

B01D 46/24; B01D 46/04

IPC 8 full level (invention and additional information)

B01D 46/00 (2006.01); B01D 46/04 (2006.01); B01D 46/24 (2006.01)

CPC (invention and additional information)

B01D 46/2414 (2013.01); B01D 46/0043 (2013.01); B01D 46/0068 (2013.01); B01D 2201/313 (2013.01); B01D 2275/201 (2013.01)

Citation (search report)

See references of WO 9834713A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9834713 A1 19980813; AR 015361 A1 20010502; AU 6652798 A 19980826; EP 0971782 A1 20000119; JP 2001511069 A 20010807

INPADOC legal status


2002-06-12 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20011205

2001-07-11 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010525

2000-01-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990830

2000-01-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE