CN203532024U - Automobile exhaust purifier - Google Patents
Automobile exhaust purifier Download PDFInfo
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- CN203532024U CN203532024U CN201320557484.0U CN201320557484U CN203532024U CN 203532024 U CN203532024 U CN 203532024U CN 201320557484 U CN201320557484 U CN 201320557484U CN 203532024 U CN203532024 U CN 203532024U
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- automobile exhaust
- exhaust purifier
- catalyzer
- catalyst
- core
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides an automobile exhaust purifier. The automobile exhaust purifier comprises an outer shell and a catalyst core, wherein the outer shell is connected between an automobile exhaust outlet and external atmosphere, and the catalyst core comprises a catalyst contained inside the outer shell. A plurality of piezoelectric material nanowires are attached to the surface of the catalyst. According to the automobile exhaust purifier, the probability that reactants are gathered to the surface of the catalyst is improved by utilizing the piezoelectric characteristic of the piezoelectric material nanowires, so that the conversion efficiency of a catalytic reaction is improved, and the automobile exhaust purifier has wide application value and market prospects.
Description
Technical field
The utility model relates to environmental protection technical field, relates in particular to a kind of automobile exhaust purifier.
Background technique
Along with China's rapid development of economy, atmosphere polluting problem is also day by day serious.Particularly the appearance of haze weather is rooted in the hearts of the people the concept of PM2.5, also illustrates that instant stage has been arrived in the improvement of pollution of atmosphere.A pollution that important sources is vehicle exhaust of pollution of atmosphere.In the prevention and control of air pollution " ten, state " that the State Council is put into effect recently, also mentioned: promote fuel qualities, time limit is eliminated yellow mark car; According to the class of pollution, take in time driving restriction etc. for the measure of automobile exhaust pollution.
At present, automaker is that the NBS that reaches the discharge of vapour tail-gas can install automobile exhaust purifier additional in vehicle exhaust outlet port conventionally.The working principle of automobile exhaust purifier is to allow tail gas utilize when supporting the honeycomb support of noble metal catalyst pyro-oxidation-reduction reaction that not clean-burning nitrogen oxide, carbon monoxide and hydrocarbon in tail gas are degraded into nontoxic nitrogen, carbon dioxide and water.Yet current automobile exhaust purifier still can not change into innocuous gas by dusty gas completely, be therefore necessary further to improve the transformation efficiency of vehicle exhaust, alleviate the pollution to atmosphere.
Model utility content
(1) technical problem that will solve
In view of above-mentioned technical problem, the utility model provides a kind of automobile exhaust purifier based on piezoelectric material nano wire, to improve the transformation efficiency of vehicle exhaust, alleviates the pollution to atmosphere.
(2) technological scheme
According to an aspect of the present utility model, provide a kind of automobile exhaust purifier.This automobile exhaust purifier comprises: shell, is connected between vehicle exhaust exhaust port and ambient atmosphere; Catalyzer core, comprises the catalyzer being positioned in shell; Wherein, at catalyst surface, be attached with some piezoelectric material nano wires.
Preferably, in the utility model automobile exhaust purifier, piezoelectric material nano wire slenderness ratio 6～10, diameter 20～50nm.
Preferably, in the utility model automobile exhaust purifier, piezoelectric material is selected from: hexagonal wurtzite material.
Preferably, in the utility model automobile exhaust purifier, hexagonal wurtzite material is a kind of in following material: ZnO, GaN and lead zirconate titanate.
Preferably, in the utility model automobile exhaust purifier, piezoelectric material nano wire in the surperficial accounting of catalyzer duct inwall between 5～8%.
Preferably, in the utility model automobile exhaust purifier, the particle diameter of catalyst granules is between 5nm～10nm, and its material is selected from a kind of in following material: Pt, Pd, Rh and CeO
2.
Preferably, in the utility model automobile exhaust purifier, catalyzer core is integral honeycomb shape ceramic core, inside have some independently, be communicated in the catalyzer duct between vehicle exhaust exhaust port and ambient atmosphere, and nano wire is attached to the inwall in catalyzer duct; Or catalyzer core is single or double-bed catalytic unit that pellet type catalyst fill to form, and nano wire is attached to the surface of pellet type catalyst.
Preferably, in the utility model automobile exhaust purifier, between catalyzer core and shell, fill soft damping thing.
Preferably, in the utility model automobile exhaust purifier, the material of shell is steel.
Preferably, in the utility model automobile exhaust purifier, shell comprises: main paragraph, and cylindrical, built-in catalyzer core; First Transition section, is connected with main paragraph, is the toroidal towards main paragraph, is connected to vehicle exhaust exhaust port; The second changeover portion, is connected with main paragraph, is the toroidal towards main paragraph, is connected to ambient atmosphere.
(3) beneficial effect
From technique scheme, can find out, the automobile exhaust purifier of the utility model based on piezoelectric material nano wire utilizes the piezoelectric property of piezoelectric material nano wire to improve the probability that reactant is assembled to catalyst surface, thereby the conversion efficiency that improves catalytic reaction, is with a wide range of applications and market prospects.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment automobile exhaust purifier;
Fig. 2 is the enlarged view of piezoelectric material nano wire and catalyst granules position relationship in automobile tail gas purifier catalyst duct shown in Fig. 1;
Fig. 3 A is the structural representation of single bed catalyst core;
Fig. 3 B is the structural representation of dual bed catalyst core.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is further described.It should be noted that, in accompanying drawing or specification description, similar or identical part is all used identical figure number.The implementation that does not illustrate in accompanying drawing or describe is form known to a person of ordinary skill in the art in affiliated technical field.In addition, although the demonstration of the parameter that comprises particular value can be provided herein, should be appreciated that, parameter is without definitely equaling corresponding value, but can in acceptable error margin or design constraints, be similar to corresponding value.
The utility model provides a kind of automobile exhaust purifier.This automobile exhaust purifier utilizes the piezoelectric property of piezoelectric material nano wire to improve the probability that reactant is assembled to catalyst surface, thereby improves the conversion efficiency of reaction.
In an exemplary embodiment of the present utility model, provide a kind of automobile exhaust purifier based on piezoelectric material nano wire.Please refer to Fig. 1, this automobile exhaust purifier comprises: outer steel shell and be arranged at several catalyzer ducts in outer steel shell.
Outer steel shell comprises: main paragraph, and cylindrical; First Transition section, is the toroidal towards main paragraph, is connected between main paragraph and vehicle exhaust exhaust port; The second changeover portion, is the toroidal towards main paragraph, is connected between main paragraph and ambient atmosphere.
In the present embodiment, the material of shell is steel matter, but the present invention is not as limit.Those skilled in the art can select other high temperature resistant as required, and the material with some strength and toughness makes shell, are preferably metallic material.
Preferably, catalyzer core is integral honeycomb shape ceramic core, is positioned at the main paragraph of outer steel shell.This catalyzer core has many independently, is communicated in the catalyzer duct between vehicle exhaust exhaust port and ambient atmosphere.The vehicle exhaust being entered by vehicle exhaust exhaust port, after entering First Transition section, enters respectively in the plurality of catalyzer duct, finally at the second changeover portion, assembles, and is discharged to ambient atmosphere.For damping, catalyzer core does not directly contact with outer steel shell, and the soft damping thing of middle filling, as asbestos.
Fig. 2 is the enlarged view of piezoelectric material nano wire and catalyst granules position relationship in automobile tail gas purifier catalyst duct shown in Fig. 1.As shown in Figure 2, the inwall in catalyzer duct, is attached with towards ZnO nano-wire duct central axis, strip, and the catalyst granules that surface, duct exists is distributed between these ZnO nano-wires.In the present embodiment, ZnO nano-wire slenderness ratio 6～10, diameter 20～50nm.
In the present embodiment, the material of nano wire is ZnO.In addition, the material of nano wire can also be GaN(gallium nitride), or PZT(lead zirconate titanate) etc. piezoelectric material, be preferably hexagonal wurtzite material.This piezoelectric material nano wire in the surperficial accounting of catalyzer duct inwall between 5～8%.If nano wire surpasses 8% in the surperficial accounting of catalyzer duct inwall, will have a negative impact to catalytic effect.And if lower than 5%, the improvement of catalytic effect is also not obvious.
In the present embodiment, the particle diameter of a catalysis material is between 5nm～10nm, and its material can be the material of existing automobile exhaust purifier, for example Pt, Pd, Rh, CeO2 etc.
With ZnO nano-wire, Pb catalysed particulate is example, Gu the preparation of the composite coating of ZnO nano-wire and Pb catalysed particulate can adopt the way of carrying out gas-solid-method growth in disperseing to have supported the duct of catalyst particles material.In addition, the preparation of nano wire and catalysed particulate composite coating can also adopt first grow nanowire to disperse the mode of catalyst-loaded particle again.
Below introduce the working principle of the present embodiment automobile exhaust purifier: when tail gas air flow stream is crossed catalyzer duct, the piezoelectric material nano wire adhering on catalyzer duct can stressed bending.Because piezoelectric material nano wire has piezoelectric properties, flexural strain will produce the contrary piezoelectric charge of symbol in piezoelectric material nano wire both sides.These piezoelectric charges will form inhomogeneous electric field in catalyzer duct, and this electric field can make the reactant molecule utmost point divide formation small dipole.The stressed gradient that be proportional to electric field of small dipole in electric field, therefore the reactant molecule having polarized can be subject to the attraction of piezoelectric charge, to catalyst granules surface, collect, thereby improved effecting reaction substrate concentration on catalyst surface, the conversion ratio of reaction is improved.
So far, by reference to the accompanying drawings the present embodiment is revolved and be have been described in detail.According to above, describe, those skilled in the art should have clearly understanding by the automobile exhaust purifier based on piezoelectric material nano wire to the utility model.
In addition, the above-mentioned definition to each element and method is not limited in various concrete structures, shape and the method for mentioning in mode of execution, and those of ordinary skill in the art can know simply and replace it, for example:
(1) catalyzer core also can adopt the double bed structure shown in the single bed structure shown in Fig. 3 A or Fig. 3 B.The diameter of the catalyst granules of filling in this catalyzer core is generally in 3mm left and right.Catalyst granules is comprised of alumina ceramic materials, and its surface supports the nano particle of noble metal catalyst.Can utilize the grow piezoelectric material nano wire of certain density of above-mentioned similar technique in the ceramic bases that has supported noble metal nano particles.The catalyst granules of making thus (diameter is about 3mm) is filled in and forms single or double-bed catalytic unit in a constant volume device, then this catalyst converter is placed into and in shell, forms required catalyzer core and can use.When reality is used, due to the webbed passage of meeting shape between pellet type catalyst, when tail gas passes through these passages, piezoelectric material nano wire also can play the effect of above-mentioned enhancing catalytic efficiency.
In sum, the utility model provides a kind of automobile exhaust purifier based on piezoelectric material nano wire, and it utilizes the piezoelectric property of piezoelectric material nano wire to improve the probability that reactant is assembled to catalyst surface, thereby improves the conversion efficiency of reaction.
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. an automobile exhaust purifier, is characterized in that, comprising:
Shell, is connected between vehicle exhaust exhaust port and ambient atmosphere;
Catalyzer core, comprises the catalyzer being positioned in described shell;
Wherein, at described catalyst surface, be attached with some piezoelectric material nano wires.
2. automobile exhaust purifier according to claim 1, is characterized in that, described piezoelectric material nano wire slenderness ratio 6～10, diameter 20～50nm.
3. automobile exhaust purifier according to claim 1, is characterized in that, described piezoelectric material is selected from: hexagonal wurtzite material.
4. automobile exhaust purifier according to claim 3, is characterized in that, described hexagonal wurtzite material is a kind of in following material: ZnO, GaN and lead zirconate titanate.
5. automobile exhaust purifier according to claim 1, is characterized in that, described piezoelectric material nano wire in the surperficial accounting of catalyzer duct inwall between 5～8%.
6. according to the automobile exhaust purifier described in any one in claim 1 to 5, it is characterized in that, the particle diameter of described catalyst granules is between 5nm～10nm, and its material is selected from a kind of in following material: Pt, Pd, Rh and CeO
2.
7. according to the automobile exhaust purifier described in any one in claim 1 to 5, it is characterized in that, described catalyzer core is integral honeycomb shape ceramic core, inside have some independently, be communicated in the catalyzer duct between vehicle exhaust exhaust port and ambient atmosphere, and described nano wire is attached to the inwall in described catalyzer duct; Or
Described catalyzer core is that pellet type catalyst is filled single or the double-bed catalytic unit forming, and described nano wire is attached to the surface of described pellet type catalyst.
8. according to the automobile exhaust purifier described in any one in claim 1 to 5, it is characterized in that: between described catalyzer core and shell, fill soft damping thing.
9. according to the automobile exhaust purifier described in any one in claim 1 to 5, it is characterized in that, the material of described shell is steel.
10. according to the automobile exhaust purifier described in any one in claim 1 to 5, it is characterized in that, described shell comprises:
Main paragraph, cylindrical, built-in described catalyzer core;
First Transition section, is connected with described main paragraph, is the toroidal towards described main paragraph, is connected to described vehicle exhaust exhaust port;
The second changeover portion, is connected with described main paragraph, is the toroidal towards described main paragraph, is connected to described ambient atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557484.0U CN203532024U (en) | 2013-09-09 | 2013-09-09 | Automobile exhaust purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557484.0U CN203532024U (en) | 2013-09-09 | 2013-09-09 | Automobile exhaust purifier |
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| Publication Number | Publication Date |
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| CN203532024U true CN203532024U (en) | 2014-04-09 |
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| CN201320557484.0U Expired - Lifetime CN203532024U (en) | 2013-09-09 | 2013-09-09 | Automobile exhaust purifier |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105797855A (en) * | 2014-12-31 | 2016-07-27 | 北京纳米能源与***研究所 | Gas purifying device |
| CN106140476A (en) * | 2015-04-09 | 2016-11-23 | 北京纳米能源与***研究所 | A kind of rotary type gas cleaning plant and purification method |
| CN107413527A (en) * | 2017-06-12 | 2017-12-01 | 江苏中科睿赛污染控制工程有限公司 | A kind of capturing device of particulate matter |
| CN107559067A (en) * | 2017-08-21 | 2018-01-09 | 王珏 | A kind of tailed-gas treater of automobile |
| CN110836135A (en) * | 2018-08-16 | 2020-02-25 | 北京纳米能源与***研究所 | Particulate matter trapping device and exhaust gas purification system |
-
2013
- 2013-09-09 CN CN201320557484.0U patent/CN203532024U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105797855A (en) * | 2014-12-31 | 2016-07-27 | 北京纳米能源与***研究所 | Gas purifying device |
| CN105797855B (en) * | 2014-12-31 | 2017-06-23 | 北京纳米能源与***研究所 | A kind of gas cleaning plant |
| CN106140476A (en) * | 2015-04-09 | 2016-11-23 | 北京纳米能源与***研究所 | A kind of rotary type gas cleaning plant and purification method |
| CN106140476B (en) * | 2015-04-09 | 2017-12-05 | 北京纳米能源与***研究所 | A kind of rotary type gas cleaning plant and purification method |
| CN107413527A (en) * | 2017-06-12 | 2017-12-01 | 江苏中科睿赛污染控制工程有限公司 | A kind of capturing device of particulate matter |
| CN107559067A (en) * | 2017-08-21 | 2018-01-09 | 王珏 | A kind of tailed-gas treater of automobile |
| CN110836135A (en) * | 2018-08-16 | 2020-02-25 | 北京纳米能源与***研究所 | Particulate matter trapping device and exhaust gas purification system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING INSTITUTE OF NANOENERGY AND NANOSYSTEMS Free format text: FORMER OWNER: STATE NANOMETER SCIENCE CENTER Effective date: 20150206 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100190 HAIDIAN, BEIJING TO: 100083 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150206 Address after: 100083 Haidian District, Xueyuan Road, No. 30, building C, block Patentee after: Beijing Institute of Nanoenergy and Nanosystems Address before: 100190 Beijing, Zhongguancun, north of a No. 11, No. Patentee before: NATIONAL CENTER FOR NANOSCIENCE AND TECHNOLOGY |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |
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| CX01 | Expiry of patent term |