Method for regenerating particulate collection filter and exhaust gas purifying device provided with particulate collection filter

摘要

A method for regenerating a particulate collection filter (2,3) by the use of a regenerative gas according to the present invention comprises a step for causing particulate combustion in only the downstream part of said filter (2,3) in the flow of the regenerative gas by the use of the regenerative gas, and a step for causing the particulate combustion in the downstream part of the filter (2,3) to propagate toward the upstream part of the filter (2,3) in the flow of the regenerative gas. Therefore, the direction of propagation of the combustion is opposite to the direction of the flow of the regenerative gas so that only part of the particulate combustion heat in each part of the filter (2,3) is transferred upstream. Accordingly, each part of the filter (2,3) will not become too hot. IMAGE