Patent · US Expired

Method for cleaning a particle filter

US7625433B2 · kind B2 · utility

3Cited by

2References

9Claims

0Family size

Inventors

Bastian Bach · Wuppertal, DE
Achim Dittler · Stuttgart, DE
Michael Himmen · Lennestadt, DE
Bernd Krutzsch · Köngen, DE
Peter Neumann · Berlin, DE
Eberhard Schmidt · Wuppertal, DE
Jost-Peter Sonnenberg · Schwelm, DE
Gunter Wenninger · Stuttgart, DE

Key dates

Filing date	May 7, 2004
Grant date	Dec 1, 2009
Priority date	—
Expiry date	Jul 9, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S55/30
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method for cleaning a particle filter (1) with the following method steps: a gaseous stream laden with pollutants and/or particles is fed to a particle filter (1) that operates catalytically and/or by filtration, pollutants and/or particles are chemically converted or stored in the particle filter (1), filtrate or ash particles (2) being produced and/or deposited on the particle filter (1). Once the particle filter (1) has been used for a specific period of time, a layer (3, 4) for increasing the through-flow resistance is applied to the layer of filtrate or ash particles (2) in the direction of filtration.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.