CN211343073U - Emission treatment structure of double-catalyst double-oxygen sensor - Google Patents
Emission treatment structure of double-catalyst double-oxygen sensor Download PDFInfo
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- CN211343073U CN211343073U CN201922330617.0U CN201922330617U CN211343073U CN 211343073 U CN211343073 U CN 211343073U CN 201922330617 U CN201922330617 U CN 201922330617U CN 211343073 U CN211343073 U CN 211343073U
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a structure is handled in emission of two catalyst converter dioxygen sensors mainly includes: the water-cooling shell section A and the water-cooling shell section B of the main three-way catalyst are fixedly connected together and wrap the main three-way catalyst; the inlet end of the section A of the water-cooling shell is connected with the water-cooling exhaust shell through a flange bolt; a temperature exhaust sensor, a back pressure sensor and a front oxygen sensor are sequentially inserted into the internal vent pipe from the inlet end of the section A of the water-cooled shell to the position between the inlet end of the section A of the water-cooled shell and the main three-way catalytic converter; the outlet end of the section B of the water-cooling shell is connected with the auxiliary three-way catalyst through a flange bolt; a rear oxygen sensor is inserted into the internal breather pipe from the main three-way catalytic converter to the auxiliary three-way catalytic converter on the section B of the water-cooling shell; the auxiliary three-way catalyst is connected with the tube nest radiator through a flange bolt. The utility model can check the performance of the three-way catalytic converter and improve the control precision of the air-fuel ratio of the fuel gas; the exhaust gas is subjected to secondary treatment, so that the emission of CO, NOx and HC is lower.
Description
Technical Field
The utility model relates to a natural gas distributed energy technical field, concretely relates to two catalyst converter dioxygen sensor's emission processing structure.
Background
With increasingly severe global environment, clean and environment-friendly natural gas distributed energy systems are gradually heated in the market. However, the national emission requirements for the natural gas distributed energy system are extremely strict, and the system only depends on an internal purification system, so that the national emission standard is difficult to meet. Therefore, the exhaust emission treatment of the natural gas distributed energy system is very important for the system to reach the standard.
When the natural gas distributed energy system is started, the existing emission treatment structure of the single-catalyst double-oxygen sensor is adopted to treat waste, and due to the large air-fuel ratio amplitude and insufficient oxygen content, the conversion rate of the three-way catalyst is low, fuel gas cannot be completely combusted, the oxidation-reduction reaction of waste gas is insufficient, and carbon monoxide (CO) and Nitrogen Oxides (NO) are generatedX) The emission of three exhaust gases, Hydrocarbon (HC), is still high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two catalyst converter dioxygen sensor's emission processing structure to solve the big, the low, the insufficient scheduling problem of exhaust gas reaction of air-fuel ratio amplitude that exists among the prior art of conversion of three way catalyst converter.
In order to realize the purpose, the technical scheme of the utility model is that:
an emission treatment structure of a dual-catalyst dual-oxygen sensor is characterized by mainly comprising: a main three-way catalyst and an auxiliary three-way catalyst; the water-cooling shell section A and the water-cooling shell section B of the main three-way catalyst are fixedly connected together and wrap the main three-way catalyst; the inlet end of the section A of the water-cooling shell is connected with the water-cooling exhaust shell through a flange bolt; a temperature exhaust sensor, a back pressure sensor and a front oxygen sensor are sequentially inserted into the internal vent pipe from the inlet end of the section A of the water-cooling shell to the position between the inlet end of the section A of the water-cooling shell and the main three-way catalytic converter; the outlet end of the section B of the water-cooling shell is connected with the auxiliary three-way catalyst through a flange bolt; a rear oxygen sensor is inserted into an internal breather pipe from the main three-way catalytic converter to the auxiliary three-way catalytic converter on the section B of the water-cooling shell; the auxiliary three-way catalyst is connected with the tube nest radiator through a flange bolt.
The utility model has the advantages that: the utility model can check the performance of the three-way catalyst and improve the control precision of the air-fuel ratio of the fuel gas by adding an oxygen sensor in front of and behind the three-way catalyst; the rear end of the main three-way catalyst is connected with an auxiliary three-way catalyst through a bolt, so that the secondary treatment is carried out on the waste gas, and the emission of CO, NOx and HC is lower.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the process for engine exhaust emission according to the present invention;
FIG. 3 is a schematic diagram of the control of engine exhaust emission according to the present invention;
in the figure: 1-water-cooling exhaust shell, 2-water-cooling shell section A, 3-exhaust temperature sensor, 4-backpressure sensor, 5-front oxygen sensor, 6-main three-way catalyst, 7-water-cooling shell section B, 8-rear oxygen sensor, 9-auxiliary three-way catalyst and 10-tube array radiator.
Detailed Description
The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1. An emission treatment structure of a dual-catalyst dual-oxygen sensor mainly comprises: a main three-way catalyst 6 and an auxiliary three-way catalyst 9; the water-cooling shell section A2 and the water-cooling shell section B7 of the main three-way catalyst 6 are fixedly connected together and wrap the main three-way catalyst 6; the inlet end of the section A2 of the water-cooling shell is connected with the water-cooling exhaust shell 1 through a flange bolt; a temperature exhaust sensor 3, a back pressure sensor 4 and a front oxygen sensor 5 are sequentially inserted into an internal breather pipe from the inlet end of the water-cooled shell A section 2 to the main three-way catalyst 6; the outlet end of the water-cooling shell section B7 is connected with the auxiliary three-way catalyst 9 through a flange bolt; a rear oxygen sensor 8 is inserted into an internal breather pipe from the main three-way catalytic converter 6 to the auxiliary three-way catalytic converter 9 on the section B7 of the water-cooling shell; the auxiliary three-way catalyst 9 is connected with a tubular radiator 10 through flange bolts.
Further, the front oxygen sensor 5 is a wide-range oxygen sensor which is arranged in a jack of the section A2 of the water-cooling shell and is different from the exhaust temperature sensor 3 and/or the back pressure sensor 4; the wide-range oxygen sensor has a wide monitoring range, can continuously monitor the air-fuel ratio between 10 and 20, is equivalent to wide-range adjustment of the concentration of mixed gas between 0.7 and 1.4, has higher accuracy of the monitored oxygen content, is beneficial to the control accuracy of an engine control unit, and realizes reduction of fuel consumption; the installation and extending position of the oxygen sensor needs to be a section of straight pipe, so that the monitored oxygen content is more accurate.
Further, the rear oxygen sensor 8 is a switch-type oxygen sensor; the switch type oxygen sensor has simple structure, small volume and low cost, and can meet the use requirement although the detection precision and the monitoring range are lower than those of a wide-range oxygen sensor.
The utility model discloses a two catalyst converter dioxygen sensor's emission processing structure is applied to the emission processing of engine exhaust, and its flow is shown in fig. 2, and the waste gas after the automobile engine burning passes through the cooling of water-cooling exhaust shell 1, passes through in proper order row temperature sensor 3, back pressure sensor 4 and preceding oxygen sensor 5, obtains the temperature, pressure and the oxygen content parameter of waste gas; then the primary treatment is carried out on the waste gas by the main three-way catalyst 6; the catalytic effect of the treated exhaust gas is tested by the post-oxygen sensor 8; then the waste gas enters the auxiliary three-way catalyst 9 for secondary treatment, so that the catalytic effect is enhanced, and the content of harmful gas is reduced; and finally, the temperature is reduced through the tube nest radiator 10 and then the cooled gas is discharged into the atmosphere.
The utility model discloses a two catalyst converter dioxygen sensor's emission treatment structure is applied to engine exhaust's emission and handles, and its control process is shown as figure 3: (1) the waste gas after the combustion of the engine passes through the front oxygen sensor, and an obtained voltage signal is fed back to the engine control unit, and the engine control unit starts an instruction to the automobile air throttle and adjusts the opening of the automobile air throttle to accurately control the fuel metering; (2) waste gas enters the main three-way catalyst, primary treatment is carried out on the main three-way catalyst, and pollutants are greatly reduced; (3) the rear oxygen sensor detects the oxygen content in the waste gas after the primary treatment, converts the oxygen content into a small electromotive voltage signal and feeds the small electromotive voltage signal back to the engine control unit to correct the fuel control deviation, and the reaction efficiency of the three-way catalyst is improved; (4) the waste gas then enters the auxiliary three-way catalytic converter, and the auxiliary three-way catalytic converter carries out secondary treatment to the waste gas, supplements the treatment effect of the main three-way catalytic converter, increases the stability of the discharge system, and reduces the harm of the discharged waste gas.
Claims (3)
1. An emission treatment structure of a dual-catalyst dual-oxygen sensor is characterized by mainly comprising: a main three-way catalyst (6) and an auxiliary three-way catalyst (9); the water-cooling shell section A (2) and the water-cooling shell section B (7) of the main three-way catalyst (6) are fixedly connected together and wrap the main three-way catalyst (6); the inlet end of the section A (2) of the water-cooling shell is connected with the water-cooling exhaust shell (1) through a flange bolt; a temperature exhaust sensor (3), a back pressure sensor (4) and a front oxygen sensor (5) are sequentially inserted between the inlet end of the water-cooling shell A section (2) and the main three-way catalytic converter (6) and extend into an internal vent pipe; the outlet end of the section B (7) of the water-cooling shell is connected with the auxiliary three-way catalyst (9) through a flange bolt; a rear oxygen sensor (8) is inserted into an internal breather pipe from the main three-way catalyst (6) to the auxiliary three-way catalyst (9) on the section B (7) of the water-cooling shell; the auxiliary three-way catalyst (9) is connected with the tube nest radiator (10) through flange bolts.
2. The emission treatment structure of a dual catalyst dual oxygen sensor according to claim 1, wherein the front oxygen sensor (5) is a wide-area oxygen sensor at a jack of the water-cooled shell a-section (2) on a different side from the exhaust temperature sensor (3) and/or the back pressure sensor (4).
3. The emission treatment structure of a dual catalyst dual oxygen sensor according to claim 1, characterized in that the rear oxygen sensor (8) is a switch type oxygen sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922330617.0U CN211343073U (en) | 2019-12-23 | 2019-12-23 | Emission treatment structure of double-catalyst double-oxygen sensor |
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| CN201922330617.0U CN211343073U (en) | 2019-12-23 | 2019-12-23 | Emission treatment structure of double-catalyst double-oxygen sensor |
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| CN211343073U true CN211343073U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074037A (en) * | 2021-04-30 | 2021-07-06 | 潍柴动力股份有限公司 | Detection method and device for double three-way catalytic converter |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074037A (en) * | 2021-04-30 | 2021-07-06 | 潍柴动力股份有限公司 | Detection method and device for double three-way catalytic converter |
| CN113074037B (en) * | 2021-04-30 | 2022-04-26 | 潍柴动力股份有限公司 | Detection method and device for double three-way catalytic converter |
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