Honeycomb structure with filter properties, its manufacture and use in waste gas purification

摘要

A honeycomb structure comprises through channels (9a, 9b) separated by porous partition walls (7) and extending in an axial direction of the honeycomb structure. The through channels have plugging portions (11). A slit (15) per through channel is formed in the vicinity of the plugging portion of the partition walls surrounding the through channels. Independent claims are also included for: (a) a method for manufacturing the honeycomb structure, comprising jetting a fluid onto a honeycomb structure to form a slit per through channel in the vicinity of the portions of the partition walls before or after firing a green honeycomb structure; (b) an exhaust gas purification system comprising a honeycomb structure and heater for burning particulate materials trapped or collected by the honeycomb structure to regenerate a filterability, where the slit per through channel of the honeycomb structure are closed by deposition of the trapped or collected particulate materials and are opened by burning the particulate materials deposited with a heat at time of regeneration treatment, and some of non-burnable materials, e.g. ashes, are deposited in the honeycomb structure by a flow of the dust-containing fluid at a time when slits are reopened.