CN105587387A - Two-stage highly effective reducing type three-way catalyst - Google Patents

Two-stage highly effective reducing type three-way catalyst Download PDF

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Publication number
CN105587387A
CN105587387A CN201610002269.2A CN201610002269A CN105587387A CN 105587387 A CN105587387 A CN 105587387A CN 201610002269 A CN201610002269 A CN 201610002269A CN 105587387 A CN105587387 A CN 105587387A
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CN
China
Prior art keywords
catalyst converter
oxygen
double
catalyzing unit
ternary catalyzing
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Granted
Application number
CN201610002269.2A
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Chinese (zh)
Other versions
CN105587387B (en
Inventor
顾钰锋
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Katcon (Chongqing) Emission Control Systems Co.
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顾钰锋
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Priority to CN201610002269.2A priority Critical patent/CN105587387B/en
Publication of CN105587387A publication Critical patent/CN105587387A/en
Application granted granted Critical
Publication of CN105587387B publication Critical patent/CN105587387B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/10—Carbon or carbon oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

The invention provides a two-stage highly effective reducing type three-way catalyst. The two-stage highly effective reducing type three-way catalyst comprises a first-stage catalyst and a second-stage catalyst; each catalyst comprises a housing and a reaction cavity formed by the housing in a surrounding manner, the reaction cavity is filled with a honeycomb-shaped catalyzing support, and the surface of the catalyzing support is coated with a three-way catalytic agent; and the first-stage catalyst is connected with the second-stage catalyst through a section of communicating pipe, and a one-way valve pointing to the interior of the communicating pipe from the exterior of the communicating pipe is arranged on the communicating pipe. The three-way catalyst can ensure that carbonic oxide, carbureted hydrogen and nitric oxide discharged from a gasoline engine are in sufficient redox reaction, and therefore are efficiently discharged.

Description

Double-stage high-efficient reduced form ternary catalyzing unit
Technical field
The present invention relates to vehicle exhaust treatment facility field, especially, is a kind of ternary catalyzing unit.
Background technology
After automobile gasoline burning, produce a large amount of pernicious gases, mainly comprise carbon monoxide, hydrocarbon, nitrogen oxide; For this reason, generally all need to adopt ternary catalyzing unit to process this kind of mixing pernicious gas, make it generate carbon dioxide and water, then drain into atmosphere. In ternary catalyzing unit, the reaction of mainly carrying out has three, and its equation is as follows:
CO+1/2O2→CO2①、H4C2+3O2→2CO2+2H2O②、NOX+CO→N2+CO23., these three chemical reactions carry out in the same cavity of ternary catalyzing unit simultaneously, in the process of carrying out 1. formula, 2. formula is oxidation reaction, 3. formula is reduction reaction, due to 1. the carrying out of formula, consume more CO, thereby limited 3. the carrying out of formula, this has limited the reduction efficiency of nitrogen oxide, is difficult to ensure the elimination completely of nitrogen oxide; On the other hand, in the time of automobile fuel filler door, as started and accelerate time, because air-fuel ratio is lower, 1. oxygen content deficiency, also will cause, 2. formula reaction is insufficient, harmfulness that also will increase tail gas.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of double-stage high-efficient reduced form ternary catalyzing unit, carbon monoxide, hydrocarbon, nitrogen oxide that this ternary catalyzing unit can make gasoline engine discharge obtain sufficient redox reaction, thereby their efficient discharge is removed.
The present invention realizes the technical scheme that technical purpose adopts: the one-level catalyst converter, the secondary catalyst converter that before and after this double-stage high-efficient reduced form ternary catalyzing unit comprises, are communicated with; The reaction chamber that described catalyst converter comprises housing and surrounded by housing, fills up cellular catalytic support in described reaction chamber, described catalytic support surface is coated with three-way catalyst; Between described one-level, secondary catalyst converter, connect communicating pipe by one section, be provided with one described communicating pipe by the check valve in the outer point tube of pipe.
As preferably, in the inlet end of described one-level catalyst converter, be provided with an oxygen sensor, described oxygen sensor electrical couplings is in automobile engine control system.
As preferably, the front end of described one-level catalyst converter also connects an oxygen filter, for eliminating the oxygen of motor exhaust; Described oxygen filter connects automobile exhaust pipeline. Further, described oxygen filter inside is using iron powder as oxygen scavenger. Further again, described oxygen filter comprises an impeller, described impeller can be under the promotion of exhaust airstream continuous rotation, the blade face of described impeller is by forming through magnetized web plate, described iron powder is piled up in described impeller below.
Beneficial effect of the present invention is: this double-stage high-efficient reduced form ternary catalyzing unit is in the time of work, first vehicle exhaust enters one-level catalyst converter, under the lower situation of engine air-fuel, generally under the situation of open out, because oxygen content in tail gas is lower, thereby the CO oxidation reaction in tail gas is limited, make a large amount of CO carry out reduction reaction with nitrogen oxide in one-level catalyst converter, nitrogen oxide is fully eliminated, subsequently, remaining pernicious gas carbon monoxide, hydrocarbon is through one-level, after the communicating pipe of secondary catalyst converter, enter secondary catalyst converter, when by described communicating pipe, air velocity is strengthened, thereby intraductal atmospheric pressure is lower than tube pressure, pipe outer air is inhaled in pipe by the check valve on communicating pipe, thereby while making mist enter secondary catalyst converter, be rich in oxygen, thereby the oxidation reaction of carbon monoxide, hydrocarbon is fully carried out, thus, three chemical equations in background technology are all carried out fully, pernicious gas content in final tail gas of discharging is declined to a great extent.
Brief description of the drawings
Fig. 1 is embodiment mono-schematic diagram of this double-stage high-efficient reduced form ternary catalyzing unit.
Fig. 2 is embodiment bis-schematic diagrames of this double-stage high-efficient reduced form ternary catalyzing unit.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described:
Embodiment mono-:
In the embodiment mono-shown in Fig. 1, the one-level catalyst converter 1, the secondary catalyst converter 2 that before and after this double-stage high-efficient reduced form ternary catalyzing unit comprises, are communicated with; The reaction chamber that described catalyst converter comprises housing and surrounded by housing, fills up cellular catalytic support 11,21 in described reaction chamber, described catalytic support surface is coated with three-way catalyst; Between described one-level, secondary catalyst converter 1,2, connected by one period of communicating pipe 3, be provided with one described communicating pipe 3 by the check valve 4 in the outer point tube of pipe.
Above-mentioned ternary catalyzing unit, is provided with an oxygen sensor 5 in the inlet end of described one-level catalyst converter 1, described oxygen sensor 5 electrical couplings are in automobile engine control system; For monitoring the run in oxygen content of the tail gas of engine direct, to regulate atomizer by engine control system, the air-fuel ratio of control engine.
Above-mentioned double-stage high-efficient reduced form ternary catalyzing unit is in the time of work, first vehicle exhaust enters one-level catalyst converter 1, under the lower situation of engine air-fuel, generally under the situation of open out, because oxygen content in tail gas is lower, thereby the CO oxidation reaction in tail gas is limited, make a large amount of CO carry out reduction reaction with nitrogen oxide in one-level catalyst converter 1, nitrogen oxide is fully eliminated, , in one-level catalyst converter 1, 3. formula in background technology is fully carried out, subsequently, remaining pernicious gas carbon monoxide, hydrocarbon is through one-level, after the communicating pipe 3 of secondary catalyst converter, enter secondary catalyst converter 2, passing through 3 o'clock described communicating pipes, because air velocity is strengthened, thereby intraductal atmospheric pressure is lower than tube pressure, pipe outer air is inhaled in pipe by the check valve 4 on communicating pipe 3, thereby while making mist enter secondary catalyst converter 2, be rich in oxygen, thereby the oxidation reaction of carbon monoxide, hydrocarbon is fully carried out,, in secondary catalyst converter 2, make in background technology 1., 2. formula is fully carried out, thus, three chemical equations in background technology are all carried out fully, pernicious gas content in final tail gas of discharging is declined to a great extent.
Embodiment bis-:
In the embodiment bis-shown in Fig. 2, be with the difference of embodiment mono-: the front end of described one-level catalyst converter 1 is also connected an oxygen filter 6, for eliminating the oxygen of motor exhaust; Described oxygen filter 6 connects automobile exhaust pipeline; Described oxygen sensor 5 is located at the front end of oxygen filter 6, the run in oxygen content of the tail gas put of engine direct is monitored, to feed back to engine control system.
Described oxygen filter 6 inside comprise an impeller 61, described impeller 61 can be under the promotion of exhaust airstream continuous rotation, the blade face of described impeller 61 is by forming through magnetized web plate; In described oxygen filter 6, going back bulk storage has iron powder, and using this iron powder as oxygen absorber, described iron powder is piled up in described impeller 61 belows; According to this scheme, in exhaust process, impeller 61 continuous rotations, upwards draw iron powder by magnetic attraction on the blade face of impeller 61 belows, and be covered with gradually blade face, until the outer field iron powder in blade face reaches mechanical balance, (the suffered magnetic force of outer field iron powder is less, and suffered gravity is constant) thus make iron powder taking the blade face of impeller 61 as support is the planar circulating area that is distributed in tail gas, make the oxygen in tail gas be absorbed (making oxidation of iron powder) by iron powder fully, the circulation of tail gas is not formed again to obvious obstruction simultaneously.
For embodiment bis-, in the time that automobile at the uniform velocity travels, original tail gas hollow is fired in higher situation, can first the oxygen in original tail gas be absorbed in a large number by described oxygen filter 6, and then in one-level catalyst converter 1, make the nitrogen oxide fully reaction of having ready conditions, and in secondary catalyst converter 2, carbon monoxide and hydrocarbon are removed; That is, embodiment bis-can be under any transport condition of automobile, three sufficient reactings in background technology is carried out, fully to reduce the harm gas in tail gas.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (5)

1. a double-stage high-efficient reduced form ternary catalyzing unit, is characterized in that: the one-level catalyst converter (1), the secondary catalyst converter (2) that before and after comprising, are communicated with; The reaction chamber that described catalyst converter comprises housing and surrounded by housing, fills up cellular catalytic support (11,21) in described reaction chamber, described catalytic support (11,21) surface is coated with three-way catalyst; Between described one-level, secondary catalyst converter (1,2), connected by one period of communicating pipe (3), be provided with one described communicating pipe (3) by the check valve (4) in the outer point tube of pipe.
2. double-stage high-efficient reduced form ternary catalyzing unit according to claim 1, it is characterized in that: in the inlet end of described one-level catalyst converter (1), be provided with an oxygen sensor (5), described oxygen sensor (5) electrical couplings is in automobile engine control system.
3. double-stage high-efficient reduced form ternary catalyzing unit according to claim 1, is characterized in that: the front end of described one-level catalyst converter (1) also connects an oxygen filter (6), for eliminating the oxygen of motor exhaust; Described oxygen filter (5) connects automobile exhaust pipeline.
4. double-stage high-efficient reduced form ternary catalyzing unit according to claim 3, is characterized in that: described oxygen filter inside is using iron powder as oxygen scavenger.
5. double-stage high-efficient reduced form ternary catalyzing unit according to claim 4, it is characterized in that: described oxygen filter (6) comprises an impeller (61), described impeller (61) can be under the promotion of exhaust airstream continuous rotation, the blade face of described impeller (61) is by forming through magnetized web plate, and described iron powder is piled up in described impeller (61) below.
CN201610002269.2A 2016-01-06 2016-01-06 Double-stage high-efficient reduced form ternary catalyzing unit Expired - Fee Related CN105587387B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019768A (en) * 2017-11-07 2018-05-11 哈尔滨理工大学 A kind of two-stage type gas heater flue gas processing device
CN112901317A (en) * 2021-03-16 2021-06-04 安徽江淮汽车集团股份有限公司 Three way catalyst converter packaging structure, engine assembly and car

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3732301C1 (en) * 1987-09-25 1989-05-18 Comuna Metall Vorrichtungs Und Emission control device for an internal combustion engine
JPH11247654A (en) * 1998-03-04 1999-09-14 Nissan Motor Co Ltd Exhaust emission control device using nox stored and reduced type three-way catalyst
US6122909A (en) * 1998-09-29 2000-09-26 Lynntech, Inc. Catalytic reduction of emissions from internal combustion engines
EP1152140A2 (en) * 2000-05-02 2001-11-07 Nissan Motor Co., Ltd. Exhaust gas purifying system of internal combustion engine
US20020092292A1 (en) * 2001-01-16 2002-07-18 Jun Hasegawa Emission control apparatus for engine and method for reducing emissions of engine
GB2379895A (en) * 2001-06-19 2003-03-26 Ford Global Tech Inc A method and system for controlling an emission device
US6722125B1 (en) * 1998-04-11 2004-04-20 Audi Ag Method for operating an internal combustion engine
JP2004148190A (en) * 2002-10-30 2004-05-27 Nissan Motor Co Ltd Catalyst system for purifying exhaust gas
US20080072578A1 (en) * 2006-09-21 2008-03-27 Kumar Sanath V Treatment Systems and Methods for Internal Combustion Engine Exhaust Streams

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3732301C1 (en) * 1987-09-25 1989-05-18 Comuna Metall Vorrichtungs Und Emission control device for an internal combustion engine
JPH11247654A (en) * 1998-03-04 1999-09-14 Nissan Motor Co Ltd Exhaust emission control device using nox stored and reduced type three-way catalyst
US6722125B1 (en) * 1998-04-11 2004-04-20 Audi Ag Method for operating an internal combustion engine
US6122909A (en) * 1998-09-29 2000-09-26 Lynntech, Inc. Catalytic reduction of emissions from internal combustion engines
EP1152140A2 (en) * 2000-05-02 2001-11-07 Nissan Motor Co., Ltd. Exhaust gas purifying system of internal combustion engine
US20020092292A1 (en) * 2001-01-16 2002-07-18 Jun Hasegawa Emission control apparatus for engine and method for reducing emissions of engine
GB2379895A (en) * 2001-06-19 2003-03-26 Ford Global Tech Inc A method and system for controlling an emission device
JP2004148190A (en) * 2002-10-30 2004-05-27 Nissan Motor Co Ltd Catalyst system for purifying exhaust gas
US20080072578A1 (en) * 2006-09-21 2008-03-27 Kumar Sanath V Treatment Systems and Methods for Internal Combustion Engine Exhaust Streams

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019768A (en) * 2017-11-07 2018-05-11 哈尔滨理工大学 A kind of two-stage type gas heater flue gas processing device
CN112901317A (en) * 2021-03-16 2021-06-04 安徽江淮汽车集团股份有限公司 Three way catalyst converter packaging structure, engine assembly and car

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C06 Publication
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C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information
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Inventor after: Chen Yanfeng

Inventor before: Gu Yufeng

TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20180111

Address after: No. 2, Yu Zuo Chang Mei Road, Jiangbei District, Chongqing City, Chongqing

Applicant after: Katcon (Chongqing) Emission Control Systems Co.

Address before: 215000 Suzhou City, Xiangcheng District Province, the town of yuan and Qi Lu Road, No. 402, room 1, 47

Applicant before: Gu Yufeng

GR01 Patent grant
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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180202

Termination date: 20200106