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Exhaust gas purifying device and manufacturing method thereof

A technology for an exhaust gas purification device and a manufacturing method, which is applied to exhaust devices, mufflers, catalyst carriers, etc., can solve the problems of reduced surface pressure of sealing materials, a large number of inorganic fibers, and reduced retention force, so as to prevent dislocation and increase frictional resistance. , the effect of simple manufacture

Active Publication Date: 2010-09-29
IBIDEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in this method, when the metal case is thermally expanded due to high-temperature exhaust gas, since a non-expandable holding sealing material is used, the surface pressure of the holding sealing material decreases, that is, the holding force decreases.
Also, if the weight per unit area of ​​the sealing material is increased in anticipation of the thermal expansion of the metal case, a large amount of inorganic fibers is required, which is uneconomical.

Method used

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  • Exhaust gas purifying device and manufacturing method thereof
  • Exhaust gas purifying device and manufacturing method thereof
  • Exhaust gas purifying device and manufacturing method thereof

Examples

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Effect test

no. 1 approach

[0054] Hereinafter, a first embodiment, which is one embodiment of the exhaust gas purification device and the manufacturing method of the exhaust gas purification device of the present invention, will be described with reference to the drawings.

[0055] figure 1 (a) is a perspective view schematically showing the exhaust gas purifying device of this embodiment, figure 1 (b) is figure 1 A-A line sectional view of the exhaust gas purification device shown in (a).

[0056] Such as figure 1 (a) and figure 1 As shown in (b), the exhaust gas purification device 10 is composed of an exhaust gas treatment body 40, a metal casing 20 and a holding sealing material 30, wherein the exhaust gas treatment body 40 is a columnar column in which a plurality of channels 41 are arranged side by side across the channel wall 42 in the longitudinal direction. Exhaust gas treatment body; metal casing 20 accommodates exhaust gas treatment body 40 ; holding sealing material 30 is provided betwee...

Embodiment 1

[0111] (1) Production of holding sealing material

[0112] Prepare a composition ratio of Al 2 o 3 : SiO 2 = 72:28 base mat. A bulk density of 0.15g / cm 3 , The weight per unit area is 1050g / m 2 acupuncture treatment pads.

[0113] Separately, an acrylic latex emulsion in which acrylic latex was dispersed in water was prepared and used as a binder.

[0114] Next, the needle-punched mat was cut to a size of 265 mm×83 mm in plan view. The trimmed needle-punched mat was uniformly sprayed with a binder in an amount of 1.0% by weight relative to the amount of alumina fibers of the trimmed needle-punched mat using a sprayer.

[0115] Thereafter, the needle-punched mat to which the adhesive was attached was ventilated and dried at a temperature of 140° C. for 5 minutes under a pressure of 70 kPa to produce a image 3 The shape shown holds the sealing material.

[0116] (2) Fabrication of wound body

[0117] A cylindrical exhaust gas treatment body mainly composed of porous c...

no. 2 approach

[0137] In the exhaust gas purification device of the present embodiment, the corrosion area is formed not by an acid solution but by a chloride solution. The exhaust gas purification device and the manufacturing method of the exhaust gas purification device which generate|occur|produce a corrosion area using sodium chloride as the chloride of a chloride solution are demonstrated below.

[0138] The exhaust gas purifying device of this embodiment has the same configuration as that of the first embodiment except that the formation of the corrosion region is completed using a sodium chloride solution. However, since the corrosion ability of the sodium chloride solution to corrode the base material of the shell is lower than that of the hydrochloric acid solution, although the degree of corrosion of the base material of the shell depends on the concentration of sodium chloride and hydrochloric acid, it is generally the case when the same molar concentration of the etchant is used. ...

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Abstract

The invention provides an exhaust gas purifying device and a manufacturing method thereof. The exhaust gas purifying device can be manufactured through a simple manufacturing method. The exhaust gas treating body can be kept and fixed even the bulk density of assembled sealing materials is not increased and no additional external force is exerted on the sealing materials. The exhaust gas purifying device includes an exhaust gas treating body, a metal casing, and a holding sealing material, wherein the exhaust gas treating body is a columnar exhaust gas treating body formed by paralleling a plurality of ducts along the longitudinal direction to define duct walls; the metal casing is arranged for containing the exhaust gas treating body; and the holding sealing material includes an inorganic fiber aggregated body and is arranged between the exhaust gas treating body and the metal casing in order to hold the exhaust gas treating body. The exhaust gas purifying device is characterized in that at least one part of the metal casing opposite to the holding sealing material is provided with a corroded area formed by corroding the substrate of the metal casing.

Description

technical field [0001] The present invention relates to an exhaust gas purification device and a manufacturing method of the exhaust gas purification device. Background technique [0002] Particulate matter (hereinafter also referred to as PM) is contained in exhaust gas discharged from an internal combustion engine such as a diesel engine, and in recent years, it has become a problem that the PM endangers the environment and the human body. Moreover, since the exhaust gas also contains harmful gas components such as CO, HC, and NOx, there are also concerns about the impact of these harmful gas components on the environment and human body. [0003] Therefore, as an exhaust gas purification device for trapping PM in the exhaust gas and purifying harmful gas components, various exhaust gas purification devices composed of an exhaust gas treatment body, a housing, and a holding sealing material have been proposed. Among them, the exhaust gas treatment body is made of silicon ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N13/18
CPCF01N2350/00F01N2450/02F01N2510/00F01N2450/00F01N3/2853F01N2310/00F01N2310/06Y10T29/49826Y10T29/49345
Inventor 三谷贤一江口将行柳泽龙也
Owner IBIDEN CO LTD
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