Honeycomb structure body

Abstract

An object of the present invention is to provide a honeycomb structural body for use in a filter, which can be provided with a large amount of catalyst, can suppress an increase in pressure loss upon collecting particulates, can have a high particulate collecting capability and can efficiently carry out a regenerating process and a toxic gas purifying process. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body that is mainly composed of inorganic fibers and has a structure in that a large number of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. Herein, the inorganic fibers, which form the honeycomb structural body, are arranged in such a manner that more fibers are aligned along a face perpendicular to the forming direction of the through holes rather than aligned along a face in parallel with the forming direction of the through holes.

Description

[0001] This application is a divisional application, the international application number of the original application is PCT / JP2004 / 008129, the Chinese national application number is 200480001072.2, the filing date is June 10, 2004, and the invention name is "honeycomb structure". technical field [0002] The present invention relates to a honeycomb structural body for removing particulates and the like in exhaust gas discharged from an internal combustion engine such as a diesel engine. Background technique [0003] The inclusion of particulates such as soot in exhaust gas discharged from internal combustion engines of vehicles such as automobiles, trucks, and construction machinery has posed a problem of harmfulness to the environment and the human body. Heretofore, various filters have been proposed in order to trap particulates in exhaust gas and purify the exhaust gas, and a filter having a honeycomb structure has also been proposed. [0004] FIG. 4 is a perspective vie...

AI Technical Summary

Problems solved by technology

[0021] However, when the above method is used in the above filter, the strength of the filter becomes low

Especially in the case of the filter disclosed in Patent Document 1, the strength of the filter becomes very low

For this reason, when the trapped particles are combusted (hereinafter referred to as the regeneration process), this type of filter may experience a large temperature difference along the length of the filter along with the combustion process of the particles, resulting in subsequent thermal stress in the filter causing damage such as cracks

As a result, the above filter loses its ability to filter

[0022] Also, in order to effectively utilize the exhaust gas generated by the engine for regeneration and purification processes, it is desirable to install the filter right below the engine; however, this installation space is very limited

For this reason, the filter needs to be made into a complicated shape; however, it is difficult to make the existing filter into a complicated shape

[0023] In addition, laminated filters have been disclosed; however, these filters have not achieved high porosity by adding ceramic fibers to ceramic materials (cup soil) to enhance toughness (see Patent Document 4)

Images