CN216559727U - Engine post-processing system and test bench - Google Patents
Engine post-processing system and test bench Download PDFInfo
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- CN216559727U CN216559727U CN202123050110.3U CN202123050110U CN216559727U CN 216559727 U CN216559727 U CN 216559727U CN 202123050110 U CN202123050110 U CN 202123050110U CN 216559727 U CN216559727 U CN 216559727U
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Abstract
The utility model relates to the technical field of vehicle air intake and exhaust, and discloses an engine post-processing system and a test bench. The engine aftertreatment system includes a main conduit, a first conduit, and a second conduit. The first pipeline is sequentially provided with a first switch valve, a selective catalytic reducing agent, an ammonia escape catalyst, an oxidation catalyst and a diesel particulate filter along the exhaust direction of the engine, and the first switch valve can open or close the first pipeline. The second pipeline and the first pipeline are connected in parallel on the main pipeline, a second switch valve and a three-way catalytic converter are sequentially arranged on the second pipeline along the exhaust direction of the engine, and the second switch valve can open or close the second pipeline. When one of the first on-off valve and the second on-off valve is opened, the other is closed. The test bench adopts above-mentioned engine aftertreatment system, can satisfy diesel engine and natural gas engine's exhaust emission respectively and handle the demand, possesses the commonality to first pipeline and second pipeline interlocking have been realized.
Description
Technical Field
The utility model belongs to the technical field of vehicle air intake and exhaust, and particularly relates to an engine post-processing system and a test bench.
Background
An engine aftertreatment system is a system for treating exhaust gas of an engine, which is installed in an engine exhaust system to reduce the amount of pollutants discharged from the exhaust gas through a catalytic oxidation reaction.
Along with market demand expansion of remanufactured engines, personalized demands of users on the remanufactured engines are increasingly outstanding, product emission standards of the remanufactured engines comprise Euro I to Euro VI emission standards, fuel forms are expanded from diesel to natural gas, and exhaust emission of the remanufactured engines needs to be processed through a test bench so as to meet requirements of emission regulations.
At present, the aftertreatment systems of the diesel engine and the natural gas engine can only carry out exhaust emission treatment on diesel oil and natural gas independently. When engines with different fuel forms are processed, different aftertreatment systems need to be replaced, the operation is complicated, the universality is poor, and the use cost of the aftertreatment systems is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an engine after-treatment system, which is used for meeting the requirements of exhaust emission treatment of a diesel engine and a natural gas engine respectively and improving the universality of the engine after-treatment system.
Another objective of the present invention is to provide a test bench to meet the requirements of exhaust emission treatment of diesel engines and natural gas engines, respectively, and to improve the versatility of an engine post-treatment system.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
an engine aftertreatment system comprising:
a main pipeline;
the system comprises a first pipeline, a second pipeline and a third pipeline, wherein a first switch valve, a selective catalytic reducing agent, an ammonia escape catalyst, an oxidation catalyst and a diesel particulate filter are sequentially arranged along the exhaust direction of an engine, and the first switch valve can open or close the first pipeline;
the second pipeline is connected with the first pipeline in parallel and is provided with a second switch valve and a three-way catalytic converter in sequence along the exhaust direction of the engine, and the second switch valve can open or close the second pipeline;
when one of the first on-off valve and the second on-off valve is open, the other is closed.
Further, the selective catalytic reductant is integrated with the ammonia slip catalyst.
Further, the oxidation catalyst is integrated with the diesel particulate filter.
Further, the engine aftertreatment system further comprises:
the flowmeter is arranged on the first pipeline and is positioned at the front end of the selective catalytic reducing agent; the flowmeter is used for measuring the exhaust gas volume of the first pipeline.
Further, the engine aftertreatment system further comprises:
and the one-way fire relief valve is arranged on the main pipeline and is positioned at the front ends of the first pipeline and the second pipeline along the exhaust direction of the engine.
Further, the engine aftertreatment system further comprises:
and the temperature sensors are arranged on the main pipeline and are respectively positioned at the front end and the rear end of the first pipeline and the second pipeline along the exhaust direction of the engine.
Further, the engine aftertreatment system further comprises:
and the pressure sensors are arranged on the main pipeline and are respectively positioned at the front end and the rear end of the first pipeline and the second pipeline along the exhaust direction of the engine.
Further, the first switch valve and the second switch valve are both explosion-proof electromagnetic valves.
A test bench comprises the engine aftertreatment system.
The utility model has the beneficial effects that:
according to the engine post-treatment system provided by the utility model, the first pipeline and the second pipeline are connected in parallel in the main pipeline, and when the first switch valve is opened, tail gas of the diesel engine is subjected to tail gas emission treatment through the first pipeline. When the second switch valve is opened, the tail gas of the natural gas engine is subjected to tail gas emission treatment through the second pipeline. Make engine aftertreatment system can satisfy diesel engine and natural gas engine's exhaust emission respectively and handle the demand, possess the commonality, reduced use cost.
In addition, the first pipeline can be communicated with the main pipeline through the first switch valve, the second pipeline can be communicated with the main pipeline through the second switch valve, and the switching operation is simple and convenient. Meanwhile, when one of the first switch valve and the second switch valve is opened, the other one is closed, so that the interlocking of the first pipeline and the second pipeline is realized, and the safety and the reliability of an engine post-processing system are improved.
The test bench provided by the utility model adopts the engine post-treatment system, can respectively meet the requirements of tail gas emission treatment of a diesel engine and a natural gas engine, has universality and reduces the use cost. The first pipeline can be communicated with the main pipeline through the first switch valve, the second pipeline can be communicated with the main pipeline through the second switch valve, and switching operation is simple and convenient. Meanwhile, when one of the first switch valve and the second switch valve is opened, the other one is closed, so that the interlocking of the first pipeline and the second pipeline is realized, and the safety and the reliability of an engine post-processing system are improved.
Drawings
FIG. 1 is a block diagram of an engine aftertreatment system according to an embodiment of the utility model.
The component names and designations in the drawings are as follows:
10. a main pipeline; 20. a first pipeline; 30. a second pipeline;
1. a first on-off valve; 2. a selective catalytic reducing agent; 3. an ammonia slip catalyst; 4. an oxidation catalyst; 5. a diesel particulate filter; 6. a second on-off valve; 7. a three-way catalytic converter; 8. a flow meter; 9. one-way fire relief valve.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
Along with the development of refabrication engine, the emission standard of refabrication engine product includes Euro I to Euro VI emission standard, and the fuel is extended to the natural gas form by diesel oil, all needs to handle the exhaust emissions of refabrication engine through the test bench to satisfy the requirement of emission regulation.
At present, the aftertreatment systems of the diesel engine and the natural gas engine can only carry out exhaust emission treatment on the diesel engine and the natural gas engine independently. When treating the tail gas of the engine of different fuel forms, need to change different aftertreatment systems, complex operation, the commonality is relatively poor, has increased aftertreatment system's use cost.
In order to solve the above problem, the present embodiment discloses an engine aftertreatment system, which is mainly used for exhaust emission treatment of a remanufactured engine to check whether exhaust emission of the remanufactured engine using diesel or natural gas as fuel meets the emission standard. Of course, the engine after-treatment system can also be used for exhaust emission treatment of a conventional engine, and is not particularly limited herein.
As shown in fig. 1, the engine aftertreatment system includes a main conduit 10, a first conduit 20, and a second conduit 30. The first pipe 20 is provided with a first on-off valve 1, a Selective Catalytic Reduction (SCR) 2, an Ammonia Slip Catalyst 3 (ASC), an Oxidation Catalyst 4 (DOC), and a Diesel Particulate Filter 5 (DPF) in this order along an exhaust direction of the engine, and the first on-off valve 1 can open or close the first pipe 20. The second pipeline 30 is connected in parallel with the first pipeline 20 on the main pipeline 10, a second on-off valve 6 and a three-way catalyst (TWC) converter 7 are sequentially arranged on the second pipeline 30 along the exhaust direction of the engine, and the second on-off valve 6 can open or close the second pipeline 30.
In the present embodiment, a first pipeline 20 and a second pipeline 30 are connected in parallel in the main pipeline 10, and when the first switching valve 1 is opened, the exhaust gas of the diesel engine is subjected to an exhaust treatment through the first pipeline 20. When the second switching valve 6 is opened, the exhaust gas of the natural gas engine is subjected to an exhaust treatment through the second pipe 30. The first switching valve 1 can communicate the first pipeline 20 with the main pipeline 10, and the second switching valve 6 can communicate the second pipeline 30 with the main pipeline 10, so that the switching operation is simple. Because the engine aftertreatment system can respectively meet the requirements of the diesel engine and the natural gas engine on exhaust emission treatment, the engine aftertreatment system has universality and reduces the use cost.
Note that, when one of the first and second switching valves 1 and 6 is opened, the other is closed. Namely, the first pipeline 20 and the second pipeline 30 are not communicated with the main pipeline 10 at the same time, so that the first pipeline 20 and the second pipeline 30 are interlocked, and the safety and the reliability of an engine aftertreatment system are improved.
The engine aftertreatment system of the embodiment can meet the requirements of exhaust emission treatment of engines with different powers and different emission levels, and is wide in application range and high in universality.
The first switch valve 1 and the second switch valve 6 of the embodiment are explosion-proof electromagnetic valves, a coil shell of each explosion-proof electromagnetic valve has an explosion-proof effect of bearing gas explosion pressure, and has a retarding effect on gas explosion energy transfer, so that the safety performance is higher, and the safety and the reliability of an engine post-processing system are improved.
As shown in fig. 1, the SCR and the ASC of the present embodiment are integrated. DOC and DPF are integrated as an organic whole, have improved the integrated level of first main pipeline 10, have reduced the volume of SCR, ASC, DOC and DPF to shorten the length of first main pipeline 10, be favorable to realizing the miniaturization of engine aftertreatment system.
As shown in fig. 1, the engine aftertreatment system further comprises a flow meter 8, the flow meter 8 being mounted on the first conduit 20 and located at the front end of the SCR. The flow meter 8 is used for measuring the exhaust gas amount of the first pipeline 20, and the injection amount of urea in the selective catalytic reduction process is set according to the measurement value of the flow meter 8, so that the accurate control of an engine aftertreatment system is facilitated.
As shown in fig. 1, the engine aftertreatment system further comprises a one-way fire-retardant valve 9, wherein the one-way fire-retardant valve 9 is arranged on the main pipeline 10 and is positioned at the front ends of the first pipeline 20 and the second pipeline 30 in the exhaust direction of the engine. The one-way fire-retardant valve 9 can prevent the tail gas of the engine from flowing backwards, and the safe and reliable operation of an engine post-treatment system is ensured.
In addition, the engine aftertreatment system also includes a temperature sensor and a pressure sensor. A plurality of temperature sensors are disposed on the main pipe 10 and are respectively located at front and rear ends of the first and second pipes 20 and 30 in an exhaust direction of the engine. A plurality of pressure sensors are disposed on the main pipe 10 and are respectively located at front and rear ends of the first and second pipes 20 and 30 in an exhaust direction of the engine.
Both the front end and the rear end of the main pipeline 10 are provided with a temperature sensor and a pressure sensor, so that the temperature difference and the pressure difference of the tail gas of the engine before and after passing through the engine post-treatment system can be acquired in real time, and the tail gas emission treatment process of the engine post-treatment system can be accurately controlled.
The embodiment also discloses a test bench, and this test bench includes foretell engine aftertreatment system, can satisfy diesel engine and natural gas engine's exhaust emission respectively and handle the demand, possesses the commonality, has reduced use cost. The first switching valve 1 can communicate the first pipeline 20 with the main pipeline 10, and the second switching valve 6 can communicate the second pipeline 30 with the main pipeline 10, so that the switching operation is simple and convenient. Meanwhile, when one of the first switch valve 1 and the second switch valve 6 is opened, the other one is closed, so that the interlocking of the first pipeline 20 and the second pipeline 30 is realized, and the safety and the reliability of an engine aftertreatment system are improved.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the utility model, which changes and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. An engine aftertreatment system, comprising:
a main line (10);
the device comprises a first pipeline (20), a first switch valve (1), a selective catalytic reducing agent (2), an ammonia escape catalyst (3), an oxidation catalyst (4) and a diesel particulate filter (5) are sequentially arranged along the exhaust direction of an engine, and the first switch valve (1) can open or close the first pipeline (20);
the second pipeline (30) is connected with the first pipeline (20) in parallel on the main pipeline (10), a second switch valve (6) and a three-way catalytic converter (7) are sequentially arranged on the second pipeline (30) along the exhaust direction of the engine, and the second switch valve (6) can open or close the second pipeline (30);
one of the first on-off valve (1) and the second on-off valve (6) is opened, and the other is closed.
2. The engine aftertreatment system of claim 1, characterized in that the selective catalytic reductant (2) is integrated with the ammonia slip catalyst (3).
3. The engine aftertreatment system according to claim 1 or 2, characterized in that the oxidation catalyst (4) is integrated with the diesel particulate filter (5).
4. The engine aftertreatment system of claim 1, further comprising:
a flow meter (8) mounted on the first pipeline (20) and located at the front end of the selective catalytic reduction agent (2); the flow meter (8) is used for measuring the exhaust gas volume of the first pipeline (20).
5. The engine aftertreatment system of claim 1, further comprising:
the one-way fire retardant valve (9) is arranged on the main pipeline (10) and is positioned at the front ends of the first pipeline (20) and the second pipeline (30) along the exhaust direction of the engine.
6. The engine aftertreatment system of claim 5, further comprising:
the temperature sensors are arranged on the main pipeline (10) and are respectively positioned at the front end and the rear end of the first pipeline (20) and the second pipeline (30) along the exhaust direction of the engine.
7. The engine aftertreatment system of claim 5, further comprising:
the pressure sensors are arranged on the main pipeline (10) and are respectively positioned at the front end and the rear end of the first pipeline (20) and the second pipeline (30) along the exhaust direction of the engine.
8. The engine aftertreatment system according to claim 1, characterized in that the first switching valve (1) and the second switching valve (6) are explosion-proof solenoid valves.
9. A test bench comprising the engine aftertreatment system of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123050110.3U CN216559727U (en) | 2021-12-07 | 2021-12-07 | Engine post-processing system and test bench |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123050110.3U CN216559727U (en) | 2021-12-07 | 2021-12-07 | Engine post-processing system and test bench |
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| CN216559727U true CN216559727U (en) | 2022-05-17 |
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| CN202123050110.3U Active CN216559727U (en) | 2021-12-07 | 2021-12-07 | Engine post-processing system and test bench |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117167659A (en) * | 2023-09-07 | 2023-12-05 | 北内柴油机(天津)有限公司 | Engine bench exhaust pipeline structure and testing method |
| CN118122105A (en) * | 2024-04-12 | 2024-06-04 | 浙江环耀环境建设有限公司 | An integrated collaborative denitrification method for controlling ammonia escape and reducing CO emissions in sintering flue gas treatment |
-
2021
- 2021-12-07 CN CN202123050110.3U patent/CN216559727U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117167659A (en) * | 2023-09-07 | 2023-12-05 | 北内柴油机(天津)有限公司 | Engine bench exhaust pipeline structure and testing method |
| CN118122105A (en) * | 2024-04-12 | 2024-06-04 | 浙江环耀环境建设有限公司 | An integrated collaborative denitrification method for controlling ammonia escape and reducing CO emissions in sintering flue gas treatment |
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