CN203796372U

CN203796372U - Three-way catalyst carrier structure

Info

Publication number: CN203796372U
Application number: CN201320657151.5U
Authority: CN
Inventors: 赵伟民; 刘书芳
Original assignee: Hua Bao Nonmetallic Material Co Ltd Of Luoyang City
Current assignee: Hua Bao Nonmetallic Material Co Ltd Of Luoyang City
Priority date: 2013-10-24
Filing date: 2013-10-24
Publication date: 2014-08-27
Anticipated expiration: 2023-10-24

Abstract

The utility model relates to a catalyst carrier, in particular to a three-way catalyst carrier structure which comprises a three-way catalyst shell (1) and a carrier body (3). The carrier body is arranged in the three-way catalyst shell, the carrier body is in a grid type, an outward-convex arc face is arranged in the middle of the air inlet end B (5) of the carrier body, grid gaps A (6) are formed in the arc face, the edge portions of the air inlet end B are planes, grid gaps B (7) are formed in the planes, the grid gaps B are larger than the grid gaps A, the surface of the air inlet end B and the inner surface of the carrier body are both coated with catalyst coatings, and ceramic fiber liners (4) are arranged between the three-way catalyst shell and the carrier body. According to the three-way catalyst carrier structure, the contact area of the automobile exhaust and a grid on the periphery of the carrier body can be increased, chemical reaction capacity of precious metal coatings and the automobile exhaust is improved, the gas purifying rate is effectively improved, and the service life of the carrier body is prolonged.

Description

A kind of three-way catalytic converter carrier structure

[technical field]

The utility model relates to a kind of catalyst converter carrier, and specifically the utility model relates to a kind of three-way catalytic converter carrier structure.

[background technique]

Known, ternary catalyzing unit, be mounted in most important outer purifier in automobile exhaust system, it can by vehicle exhaust discharge the harmful gas such as CO, HC and NOx by with catalyst converter grid on noble coatings produce oxidation and reduction, thereby change harmless carbon dioxide, water and nitrogen into, vehicle exhaust is purified; Tail-gas from gasoline automobiles pollutes day by day serious, if the contained harmful matter of the particle that swims in tail gas is sucked lung by people for a long time and will directly jeopardize people's health, along with the increase of people's environmental consciousness, the pollution that how to reduce vehicle exhaust has become the problem of everybody growing interest.

The most frequently used three-way catalytic converter carrier structure is all that even order is counted catalyst converter at present, there are two kinds, 400 orders and 600 orders, geometrical shape also mostly adopts grid type, how making vehicle exhaust evenly carry out chemical reaction by grid to greatest extent, is the key that determines three-way catalytic converter carrier structure Processing capacity, by reference to the accompanying drawings shown in 1, in accompanying drawing 1, the surface of this structure inlet end A2 is plane, in the time that tail gas air-flow enters the inlet end A2 of carrier 3, a large amount of tail gas air-flows can be introduced into the middle part pore of inlet end A2, the temperature that concentrates on carrier 3 middle part pores cannot be left, under long term high temperature, can first cause coming off and losing the function that is oxidized and reduces harmful gas at the precious metal of carrier 3 middle part pores, and the part that middle part air-flow the produces air-flow that is obstructed flows into the periphery pore of inlet end A2, thereby cause the area of contact of air-flow and carrier 3 periphery pores less, increase with the area of contact of middle part pore, air-flow is not maximized the use by the space of carrier 3.

[summary of the invention]

In order to overcome the deficiency in background technique, the utility model discloses a kind of three-way catalytic converter carrier structure, described three-way catalytic converter carrier structure is set to the inwardly outer arc shaped surface protruding by the middle part of carrier inlet end B, the limit portion of inlet end B is plane, the gap of the grid gap B of described internal plane is greater than the grid gap A of arc shaped surface inside, to impel vehicle exhaust to enter into uniformly in the grid gap B of inlet end B limit portion, the utility model is owing to having increased the grid gap B of inlet end B limit portion, impel the vehicle exhaust can be uniformly by the grid of carrier, not only increase the area of contact of vehicle exhaust and carrier periphery grid, and improve the chemical reaction ability of noble coatings and vehicle exhaust, effectively improve gas purification coefficiency, thereby extend the working life of carrier.

For realizing the object of above-mentioned model utility, the utility model adopts following technological scheme:

A kind of three-way catalytic converter carrier structure, comprise ternary catalyzing unit housing and carrier, inside at ternary catalyzing unit housing is provided with carrier, described carrier is grid type, the middle part of described carrier inlet end B is outwardly arc shaped surface, be provided with grid gap A in the inside of arc shaped surface, the limit portion of described inlet end B is plane, be provided with grid gap B in the inside of plane, the gap of described grid gap B is greater than grid gap A, be equipped with catalyst coat on the surface of carrier inlet end B and the inner face of carrier, between described ternary catalyzing unit housing and carrier, be provided with ceramic fiber liner.

Described three-way catalytic converter carrier structure, described catalyst coat is the mixture of precious metal and rare earth elements.

Described three-way catalytic converter carrier structure, described precious metal is the combined solution of platinum, palladium, rhodium.

Described three-way catalytic converter carrier structure, described liner is mesh pad.

Owing to having adopted technique scheme, the utlity model has following superiority:

Three-way catalytic converter carrier structure described in the utility model is set to the inwardly outer arc shaped surface protruding by the middle part of carrier inlet end B, the limit portion of inlet end B is plane, the gap of the grid gap B of described internal plane is greater than the grid gap A of arc shaped surface inside, to impel vehicle exhaust to enter into uniformly in the grid gap B of inlet end B limit portion, the utility model is owing to having increased the grid gap B of inlet end B limit portion, impel the vehicle exhaust can be uniformly by the grid of carrier, not only increase the area of contact of vehicle exhaust and carrier periphery grid, improve the chemical reaction ability of noble coatings and vehicle exhaust, and effectively improve the back pressure performance of gas purification coefficiency and carrier, thereby extend the working life of carrier, reach energy-conservation effect.

[brief description of the drawings]

Fig. 1 is the structural representation of traditional three-way catalytic converter carrier structure;

Fig. 2 is the A-A sectional view of traditional three-way catalytic converter carrier structure;

Fig. 3 is structural representation of the present utility model;

Fig. 4 is B-B sectional view of the present utility model;

In the drawings: 1, ternary catalyzing unit housing; 2, inlet end A; 3, carrier; 4, liner; 5, inlet end B; 6, middle part grid gap; 7, limit portion grid gap.

[embodiment]

Can explain in more detail the utility model by the following examples, the utility model is not limited to the following examples;

A kind of three-way catalytic converter carrier structure described in by reference to the accompanying drawings-accompanying drawing 4, comprise ternary catalyzing unit housing 1 and carrier 3, be provided with carrier 3 in the inside of ternary catalyzing unit housing 1, described carrier 3 is grid type, the middle part of described carrier 3 inlet end B5 is outwardly arc shaped surface, be provided with grid gap A6 in the inside of arc shaped surface, the limit portion of described inlet end B5 is plane, be provided with grid gap B7 in the inside of plane, the gap of described grid gap B7 is greater than grid gap A6, be equipped with catalyst coat on the surface of carrier 3 inlet end B5 and the inner face of carrier 3, described catalyst coat is the mixture of precious metal and rare earth elements, described precious metal is the combined solution of platinum, palladium, rhodium, between described ternary catalyzing unit housing 1 and carrier 3, be provided with ceramic fiber liner 4, described liner 4 is mesh pad.

Implement three-way catalytic converter carrier structure described in the utility model, in use, because the middle part of carrier 3 inlet end B5 is set to outwardly arc shaped surface, the limit portion of inlet end B5 is plane, and the gap of the grid gap B7 of internal plane is greater than the grid gap A6 of arc shaped surface inside, to impel vehicle exhaust to enter into uniformly in the grid gap B7 of inlet end B5 limit portion, avoid tail gas to focus in a large number the center portion of carrier 3, the temperature in carrier 3 center portions cannot be left, and the drawback that causes noble coatings to come off, between ternary catalyzing unit housing 1 and carrier 3, liner 4 is set, there is sealing, heat insulation and cushion effect, because the variation of delivery temperature is larger, the hot expansibility of ternary catalyzing unit housing 1 and carrier 3 differs larger, ceramic fiber liner 4 is set or mesh pad liner 4 all has good sealability, prevent that exhaust is from revealing between ternary catalyzing unit housing 1 and carrier 3, also can place carrier 3 is impacted and is damaged, and can effectively prevent that the high temperature of carrier 3 from passing to housing, the utility model is owing to having increased the grid gap B7 of inlet end B5 limit portion, impel vehicle exhaust can pass through uniformly the grid of carrier 3, not only increase the area of contact of vehicle exhaust and carrier 3 periphery grids, improve the chemical reaction ability of noble coatings and vehicle exhaust, and effectively improve the back pressure performance of gas purification coefficiency and carrier 3, thereby in the working life that has extended carrier 3, reach energy-conservation effect.

The utility model does not describe part in detail for prior art.

The embodiment who selects in this article for open goal of the invention of the present utility model, currently thinks suitablely, still, will be appreciated that, the utility model is intended to comprise that all belong to all changes and the improvement of the embodiment within the scope of this design and model utility.

Claims

1. a three-way catalytic converter carrier structure, comprise ternary catalyzing unit housing (1) and carrier (3), be provided with carrier (3) in the inside of ternary catalyzing unit housing (1), it is characterized in that: described carrier (3) is grid type, described carrier (3) inlet end B(5) middle part be outwardly arc shaped surface, be provided with grid gap A(6 in the inside of arc shaped surface), described inlet end B(5) limit portion be plane, be provided with grid gap B(7 in the inside of plane), described grid gap B(7) gap be greater than grid gap A(6), at carrier (3) inlet end B(5) surface and the inner face of carrier (3) be equipped with catalyst coat, between described ternary catalyzing unit housing (1) and carrier (3), be provided with ceramic fiber liner (4).

2. three-way catalytic converter carrier structure according to claim 1, is characterized in that: described liner (4) is mesh pad.