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Preparation method of large-size diesel particle filter

A particle filter and large-scale technology, which is applied in the fields of dispersed particle filtration, chemical instruments and methods, filtration and separation, etc., can solve the problems of low firing qualification rate and firing cracking, and achieve high firing qualification rate and production cost. Low, slow thermal decomposition effect

Pending Publication Date: 2020-11-06
CHONGQING AOFU FINE CERAMICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned existing problems, the present invention provides a method for preparing a large-sized diesel particulate filter to effectively solve the current problems of large-sized, high-porosity cordierite diesel particulate filters being fired and cracked, and the firing pass rate is low. Significantly reduce production costs and improve production efficiency

Method used

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  • Preparation method of large-size diesel particle filter
  • Preparation method of large-size diesel particle filter
  • Preparation method of large-size diesel particle filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a large-size diesel particulate filter includes the following steps:

[0025] (1) In parts by weight, combine 40.54 parts of talc, 7.50 parts of kaolin A, 7.50 parts of kaolin B, 18.93 parts of alumina, 10 parts of hydrated alumina, 7.53 parts of silica, and 8 parts of organic Silicon microspheres, 8 parts of starch, 5.5 parts of methyl cellulose, make a uniform mixture with close packing. The addition amount of starch is added on the basis of the inorganic components and the total components of the organic silicon microspheres. The amount of cellulose added is added on the basis of the total mixed components; (2) Place the mixed powder in a kneading machine, add 30 parts of water to the total powder, and knead for 7 minutes, then add 1 part of synthetic base oil Kneading for 10 minutes, the added amount of synthetic base oil is added on the basis of the total mixed components; (3) The kneaded mud in the kneading step (2) becomes a mud section; (4) T...

Embodiment 2

[0027] A method for preparing a large-size diesel particulate filter includes the following steps:

[0028] (1) In parts by weight, mix 40.13 parts of talc, 7.50 parts of kaolin A, 7.50 parts of kaolin B, 18.59 parts of alumina, 10 parts of hydrated alumina, 4.29 parts of silica, and 12 parts of organic Silicon microspheres, 6 parts of starch, 5.5 parts of methyl cellulose, to prepare a tightly packed homogeneous mixture. The amount of starch added is based on the inorganic components and the total components of the The amount of cellulose added is added on the basis of the total mixed components; (2) Place the mixed powder in a kneading machine, add 30 parts of water to the total powder, and knead for 7 minutes, add 1 part of synthetic base oil Kneading for 10 minutes, the added amount of synthetic base oil is added on the basis of the total mixed components; (3) The kneaded mud in the kneading step (2) becomes a mud section; (4) The plastic mud section is extruded Into a honey...

Embodiment 3

[0030] A method for preparing a large-size diesel particulate filter includes the following steps:

[0031] (1) In parts by weight, combine 38.97 parts of talc, 7.83 parts of kaolin A, 7.83 parts of kaolin B, 17.38 parts of alumina, 10 parts of hydrated alumina, 18 parts of organosilicon microspheres, 5.5 parts of Methyl cellulose to obtain a tightly packed homogeneous mixture. The addition amount of methyl cellulose is added on the basis of the total mixed components; (2) Put the mixed powder in the kneading machine and add the total powder 30 parts of water are kneaded for 7 minutes, and 1 part of synthetic base oil is added and kneaded for 10 minutes. The amount of synthetic base oil added is based on the total mixed components; (3) the kneaded mud in the kneading step (2) Material into mud section; (4) Extruding plastic mud section into honeycomb structure; (5) After drying, the green body is cut to a fixed height and then fired at a high temperature of 1425-1445℃; (6) Firing...

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Abstract

The invention discloses a preparation method of a large-size diesel particle filter. The method comprises the following steps: (1) uniformly mixing inorganic powder and organic silicon microspheres, and continuing to add polyamide powder, starch and a binder to obtain mixed powder; (2) adding the mixed powder into a kneading machine, continuously adding a lubricating agent into the kneading machine, and kneading to obtain pug; (3) preparing the pug into a pug section; (4) extruding the mud section with plasticity into a honeycomb structure; (5) cutting the dried green body to a fixed height, and sintering in a high-temperature furnace; and (6) punching the sintered green body, plugging the hole, putting the green body into a kiln, carrying out re-sintering, and finally surrounding the skinto obtain the large-size diesel particle filter. According to the preparation method of the large-size and high-porosity diesel particle filter, the product porosity is high, the micropore connectivity is good, the quality is excellent, the production cost is low, and the production efficiency is high.

Description

Technical field [0001] The invention belongs to the technical field of diesel engine particle filter preparation, and specifically relates to a method for preparing a large-size diesel particle filter. Background technique [0002] The porous wall-flow cordierite diesel particulate filter, as a kind of honeycomb ceramic, can be used to filter the exhaust of diesel vehicles. Its structure is to block the grid-like honeycomb ceramic at intervals, and each grid only plugs one end, taking advantage of the porous characteristics of the material , The exhaust gas can pass through the honeycomb wall to achieve the filtering effect of the exhaust gas. An important feature of cordierite diesel particulate filters is the high porosity. For traditional porous ceramics, mechanical pore formers are generally added to increase the porosity of the material. Organic pore formers are generally heated within the range of 150-600℃ Decomposition, a large number of organic pore formers decompose in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B35/195C04B38/06B01D46/00B01D46/24B01D39/20F01N3/022
CPCC04B33/13C04B35/195C04B38/067B01D46/0001B01D46/2425B01D39/20F01N3/0222C04B2235/3217C04B2235/3218C04B2235/3418C04B2235/483C04B2235/656C04B38/0645C04B38/0006C04B38/0074
Inventor 程国园黄妃慧潘吉庆刘洪月张兆合牛思浔郝立苗邢延岭焦雪艳
Owner CHONGQING AOFU FINE CERAMICS CO LTD
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