Ceramic honeycomb filter

A ceramic honeycomb and filter technology, which is applied to machines/engines, mufflers, engine components, etc., can solve the problems of rising pressure drop, cumbersomeness, and smaller flow passages on the inflow side of the filter to achieve the effect of low pressure drop.
CN1900493AInactive Publication Date: 2007-01-24HITACHI METALS LTD +1
2 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HITACHI METALS LTD
Publication Date
2007-01-24
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A ceramic honeycomb filter, which is composed of a ceramic honeycomb structure with a porous partition wall that divides a plurality of flow channels, and uses exhaust gas to pass through the porous partition wall to filter out particles in the exhaust gas, wherein the sealing of the specified flow channel At the end, the porous partition is provided with a catalyst, and in the case of measuring the porous partition by mercury porosimetry, the porosity is 60-75% and the average pore diameter is 15-25 μm, relative to the nth measurement The maximum value of the gradient Sn of the cumulative pore volume distribution curve of the pore diameter of the point is above 0.7, and the gradient Sn of the cumulative pore volume distribution curve is expressed by the following formula (1): Sn=-(Vn-Vn-1) / [ logDn-log(Dn-1)] (1), (where: Dn is the pore diameter (μm) of the nth measuring point, Dn-1 is the pore diameter (μm) of the n-1th measuring point, Vn is the cumulative pore volume (cm3 / g) of the nth measuring point, and Vn-1 is the cumulative pore volume (cm3 / g) of the n-1th measuring point).
Need to check novelty before this filing date? Find Prior Art

Description

[0001] This application is a divisional application of the invention patent application named "ceramic honeycomb filter" and application number 02154555.3 submitted by Hitachi Metals Co., Ltd. and Hino Automobile Co., Ltd. on September 13, 2002. technical field

[0002] The invention relates to a ceramic honeycomb filter for filtering particles contained in exhaust gas of a diesel engine. Background technique

[0003] In order to filter the particulates emitted by diesel engines, a ceramic honeycomb filter with porous partition walls is being studied to filter the exhaust gas containing particulates through the partition walls. Such filters are generally referred to as particulate collection filters (diesel particulate filters). Fig. 2 (a) is the front view of the ceramic honeycomb filter 11 used as a particle collection filter, and Fig. 2 (b) is a sectional side view of this part, image 3 It is a schematic sectional view of the ceramic honeycomb filter 11 shown in FIG. 2 ....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More