CN102121876A - Test bed of postprocessing device for simulating diesel engine exhaust gas - Google Patents
Test bed of postprocessing device for simulating diesel engine exhaust gas Download PDFInfo
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- CN102121876A CN102121876A CN2010105948799A CN201010594879A CN102121876A CN 102121876 A CN102121876 A CN 102121876A CN 2010105948799 A CN2010105948799 A CN 2010105948799A CN 201010594879 A CN201010594879 A CN 201010594879A CN 102121876 A CN102121876 A CN 102121876A
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Abstract
The invention discloses a test bed of a postprocessing device for simulating a diesel engine exhaust gas, comprising a flow control system, a temperature control system, a principal gas component control system, a pressure control system and a control principal machine, and the five subsystems and pipelines jointly form the test bed of the postprocessing device for simulating the engine exhaust gas. In the invention, the flow, the temperature, the pressure, the principal gas components of a gas entering a postprocessing device are controlled and regulated through the five subsystems to simulate the conditions of an exhaust gas of an engine under a stable working condition, thereby relative property and stability tests of the postprocessing device are realized; the test bed provided by the invention simulates the condition of a real engine exhaust gas by controlling the flow, the temperature, the pressure and the principal gas components of the gas, thereby the gas with same state of the engine exhaust gas can be provided for the postprocessing device so as to carry out the relative property and stability tests; and in addition, the test bed provided by invention has the advantages of small investment, convenience for manufacture, short manufacture and installation period, quick effect, low operating energy consumption and cost, simpleness, convenience, practicability, and the like.
Description
Technical field
Patent of the present invention relates to engine exhaust aftertreatment test system field, relates to a kind of after-treatment device testing table of simulating diesel exhaust gas in particular.
Background technology
Diesel engine is because of having the high thermal efficiency, low oil consumption and CO
2Advantages such as discharging have obtained using widely.At present, all heavy truck and most of light trucks all adopt diesel engine.Yet, along with the requirement to emission of diesel engine all over the world is more and more stricter, the optimization of depending diesel engine self alone reduces all emissions and becomes more and more difficult, diesel engine installs after-treatment device (as urea SCR, DOC, POC, DPF etc.) efficiently additional to be handled exhaust emissions and becomes more and more widely selection, and the research and development of novel diesel machine after-treatment device is also more and more hotter.
For main performance index and the reliability of estimating the diesel engine after-treatment device, need carry out great deal of experimental (for example: the pressure drop size test that the ability of after-treatment device processing target waste gas, after-treatment device produce, after-treatment device thermal vibration endurancing or the like).At present, the test of engine rig test platform is the test method that is used to test and estimate after-treatment device the most widely.This class engine rig test platform system complex mainly comprises engine, dynamometer machine, emission test equipment etc.; Bulk testing platform cost high (up to ten million easily, even several ten million); Construction period long (being determined to capital construction from scheme usually needs about 1-1.5 to equipment transportation Installation and Debugging to the whole cycle of system verification again, even longer); Operating cost height (water, electricity, oil, devices consume product, equipment amortization, personal expenditures etc.); Auxiliary facility requires high (ground damping requirement, oil depot designing requirement, testing laboratory's environmental requirement, fire-fighting requirement, noise requirements etc.).It is higher to adopt block testing stand to test whole energy consumption simultaneously.Exactly because these, a lot of diesel engine aftertreatment enterprises can't bear huge cost or owing to the construction period reason, and have limited the research and development and the technical progress of novel diesel machine after-treatment device.
Summary of the invention
What the present invention will solve is the above-mentioned defective that prior art exists, aim to provide the after-treatment device testing table of a kind of easily manufactured, price and cheap, that operation energy consumption is low and simple and practical simulation diesel exhaust gas, by the exhaust of simulation diesel engine, for the diesel engine after-treatment device provide with the engine steady state (SS) under the gas of exhaust with same characteristic features (identical flow, temperature, pressure, main gas componant) carry out the Performance And Reliability test.
For realizing above purpose, the technical solution used in the present invention is:
A kind of after-treatment device testing table of simulating diesel exhaust gas, comprise 5 subsystems: flow control system, temperature control system, main gas componant control system, control pressurer system and main control system, it is characterized in that described 5 subsystems connect by pipeline, described flow control system comprises air cleaner, blower fan and air flowmeter, adjust the rotating speed of blower fan in real time by the numerical value of air flowmeter, make that gas flow is consistent with certain operating mode flow under the engine steady state in the testing table pipeline; Described temperature control system comprises gas-heating apparatus and temperature sensor, thereby comes the heated condition of pilot-gas heating arrangement to control the temperature of gas in the testing table pipeline by the real time temperature numerical value that temperature sensor records; Described main gas componant control system comprises calibrating gas bottle, gas valve, electric flow control valve, gas mixer and gas sensor, according to main gas concentration numerical value under the corresponding operating mode of the main gas composition concentration of actual measurement, extraction flow and engine, the control electric flow control valve makes and the interior gas componant that forms corresponding concentration of testing table gas outlet make main gas evenly distribute by gas mixer then in gas outlet; Described control pressurer system comprises electric press variable valve and pressure transducer, pressure data by pressure transducer feedback is adjusted pressure-regulating valve in real time, and it is identical with the corresponding operating mode exhaust back pressure of engine to make that testing table offers the gaseous tension of after-treatment device; Described main control system is used to receive, handle the information of each sensor, controls computing, finally drives the control that each actuator carries out flow, temperature, pressure, main gas componant.
After-treatment device testing table of the present invention enters gas flow, temperature, pressure and the main gas componant of after-treatment device by described 5 subsystem regulating and controlling, exhaust situation during the simulated engine steady state condition, thus realize the Performance And Reliability test that after-treatment device is relevant.
Advantage of the present invention is: because the present invention has been by having simulated actual engine exhaust situation to the control of gas flow, temperature, pressure and main gas componant, therefore can carry out correlated performance and fail-test for after-treatment device provides the gas with the engine exhaust equal state.The after-treatment device testing table of simulation diesel exhaust gas of the present invention has small investment, convenient manufacturing, makes advantages such as installation period weak point, instant effect, operation energy consumption and cost are low, simple and practical simultaneously.
According to the present invention, a typical embodiment, described gas-heating apparatus is an electric heater, described air cleaner, blower fan and air flowmeter are connected successively by pipeline; Described calibrating gas bottle, gas valve and electric flow control valve are connected successively by pipeline; The output terminal of described air flowmeter is connected to the input end of described gas mixer by pipeline; The output terminal of described electric flow control valve connects a gas nozzle by pipeline, and described gas nozzle is arranged on the upstream of described gas mixer; The output terminal of described gas mixer connects the after-treatment device of electric heater, electric press variable valve and diesel exhaust gas successively by pipeline; Described temperature sensor and gas sensor are arranged on the downstream pipeline of electric heater, described pressure transducer is arranged on the downstream pipeline of electric press variable valve, and described main control system links to each other with the output terminal of described air flowmeter, temperature sensor, gas sensor and pressure transducer.According to the present invention, described gas sensor is gas analyzer or NOx sensor.
That the blower fan of the after-treatment device testing table of simulation diesel exhaust gas of the present invention can adopt is centrifugal, axial-flow type or diagonal flow type, does not limit concrete pattern.
The concrete quantity of calibrating gas bottle, gas valve and flowrate control valve does not limit in the simulator stand of engine exhaust after-treatment device of the present invention, and standard gas kind can specifically be set according to the needs of after-treatment device in concrete quantity and the calibrating gas bottle.
Actuator in the after-treatment device testing table of simulation diesel exhaust gas of the present invention (blower fan, flow valve and pressure-regulating valve) all can adopt hand gear, and adopts simple manual operation to realize.
The after-treatment device testing table pipeline of simulation diesel exhaust gas of the present invention adopts 304 or 304 above stainless steels making, to be adapted to the requirement of different after-treatment devices, and urea SCR system especially.
Description of drawings
Fig. 1 is used for urea SCR after-treatment device synoptic diagram for the testing table of simulation diesel exhaust gas.
Fig. 2 is used for after-treatment device DOC synoptic diagram for the testing table of simulation diesel exhaust gas.
Fig. 3 is the after-treatment device testing table control structure synoptic diagram of simulation diesel exhaust gas.
Among the figure, air cleaner-1, blower fan-2, air flowmeter-3, calibrating gas bottle-4, gas valve-5, electric flow control valve-6, gas nozzle-7, gas mixer-8, electric heater-9, electrical heating elements-10, temperature sensor-11, gas sensor-12, electric press variable valve-13, pressure transducer-14, mixer-15, urea nozzle-16, SCR catalytic converter-17, the exhaust passage of the after-treatment device of diesel exhaust gas-18, main control system-19, pipeline-20, after-treatment device DOC-21, the sensor input end-22 of main control system, the actuator output terminal-23 of main control system.
Embodiment
Contrast accompanying drawing below, by description to embodiment, to the specific embodiment of the present invention, for example: the effect of mutual alignment relation between the shape of each structure, structure and the each several part and annexation, each several part and principle of work etc. are done further detailed explanation.
The after-treatment device testing table of simulation diesel exhaust gas of the present invention has been by having simulated actual engine exhaust situation to the control of gas flow, temperature, pressure, main gas componant, carries out correlated performance and fail-test for after-treatment device provides the gas with the engine exhaust equal state.
Fig. 1 is applied to the synoptic diagram of diesel urea SCR after-treatment device for the after-treatment device testing table of simulation diesel exhaust gas of the present invention.With reference to Fig. 1, the after-treatment device testing table of simulation diesel exhaust gas of the present invention comprises that 5 groups of subsystems become: flow control system, temperature control system, main gas componant control system, control pressurer system and main control system, described 5 subsystems and pipeline 20 thereof have constituted the after-treatment device testing table of simulated engine exhaust jointly.
Described flow control system is made up of air cleaner 1, blower fan 2 and air flowmeter 3, adjusts the rotating speed of blower fan 2 in real time by the numerical value of air flowmeter 3, makes that gas flow is consistent with certain operating mode flow under the engine steady state in the testing table pipeline.
Described temperature control system is made up of electric heater 9 and temperature sensor 11, thereby controls the temperature of gas in the heated condition control testing table pipeline of electrical heating elements 10 in the electric heater 9 by the real time temperature numerical value that temperature sensor 11 records.
Described main gas componant control system is by calibrating gas bottle (NO, NO
2And NOx) 4, gas valve 5, electric flow control valve 6, gas mixer 8, gas analyzer gas sensors such as (or) NOx sensors 12 formed, according to main gas NOx concentration numerical value under the corresponding operating mode of the main gas componant NOx concentration of actual measurement, extraction flow and engine, control electric flow control valve 6 makes and make main gas NOx evenly distribute by gas mixer 8 by the interior NOx gas that forms corresponding concentration of testing table gas outlet then in gas outlet.
Described control pressurer system is made up of electric press variable valve 13 and pressure transducer 14, pressure data by pressure transducer 14 feedback is adjusted pressure-regulating valve 13 in real time, and it is identical with the corresponding operating mode exhaust back pressure of engine to make that testing table offers the gaseous tension of diesel urea SCR after-treatment device (comprising mixer 15, urea nozzle 16, SCR catalytic converter 17).
Described main control system 19 mainly is the information that receives, handles each sensor, controls computing, finally drives the control that each actuator carries out flow, temperature, pressure, main gas componant.
Specifically, described air cleaner 1, blower fan 2 and air flowmeter 3 are connected successively by pipeline; Described calibrating gas bottle 4, gas valve 5 and electric flow control valve 6 are connected successively by pipeline; The output terminal of described air flowmeter 3 is connected to the input end of described gas mixer 8 by pipeline; The output terminal of described electric flow control valve 6 connects a gas nozzle 7 by pipeline, and described gas nozzle 7 is arranged on the upstream of described gas mixer 8; The output terminal of described gas mixer 8 connects the after-treatment device of electric heater 9, electric press variable valve 13 and diesel exhaust gas successively by pipeline; Described temperature sensor 11 and gas sensor 12 are arranged on the downstream pipeline of electric heater 9, described pressure transducer 14 is arranged on the downstream pipeline of electric press variable valve 13, and described main control system 19 links to each other with described air flowmeter 3, temperature sensor 11, gas sensor 12 and the output terminal of pressure transducer 14.
The simulated engine exhaust that after-treatment device testing table by simulation diesel exhaust gas of the present invention provides just can be to the target after-treatment device---and diesel urea SCR after-treatment device (comprises mixer 15, urea nozzle 16, SCR catalytic converter 17) comprises the NOx of SCR system transformation efficiency, the pressure drop that the SCR catalytic converter produces, mixer structure is optimized, nozzle arrangements is optimized, performance test and the warm circulations of height such as gas exhaust piping optimization, fail-test researchs such as thermal vibration in conjunction with shaking table.
With reference to Fig. 2, change the calibrating gas in the calibrating gas bottle 4 into HC and CO, promptly can be after-treatment device DOC21 the simulated engine that contains main gas componant HC and CO exhaust is provided, carry out correlated performance and the fail-test of after-treatment device DOC21.
Fig. 3 is the after-treatment device testing table control structure synoptic diagram of simulation diesel exhaust gas, with reference to Fig. 3, the after-treatment device testing table control of simulation diesel exhaust gas of the present invention is by gathering each sensor (air flowmeter 3, temperature sensor 11, NOx sensor 12, pressure transducer 14) signal, carry out signal Processing then, carry out data processing by main control system, drive the control that each actuator is finished gas flow, temperature, pressure, main gas componant then.
Above-mentionedly in conjunction with the accompanying drawings the present invention has been carried out exemplary description, but specific implementation of the present invention is not subjected to the restriction of aforesaid way.As long as adopted the improvement of the various unsubstantialities that design of the present invention and technical scheme carry out, or design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention without improving.
Claims (8)
1. after-treatment device testing table of simulating diesel exhaust gas, comprise flow control system, temperature control system, main gas componant control system, control pressurer system and (19) 5 subsystems of main control system, it is characterized in that described 5 subsystems connect by pipeline 20, wherein:
Described flow control system comprises air cleaner (1), blower fan (2) and air flowmeter (3), adjust the rotating speed of blower fan in real time by the numerical value of air flowmeter (3), make that gas flow is consistent with certain operating mode flow under the engine steady state in the testing table pipeline;
Described temperature control system comprises gas-heating apparatus (9) and temperature sensor (11), the real time temperature numerical value that records by temperature sensor (11) come pilot-gas heating arrangement (9) thus heated condition control testing table pipeline in the temperature of gas;
Described main gas componant control system comprises calibrating gas bottle (4), gas valve (5), electric flow control valve (6), gas mixer (8) and gas sensor (12), according to main gas concentration numerical value under the corresponding operating mode of the main gas composition concentration of actual measurement, extraction flow and engine, the control electric flow control valve makes and the interior gas componant that forms corresponding concentration of testing table gas outlet make main gas evenly distribute by gas mixer then in gas outlet;
Described control pressurer system comprises electric press variable valve (13) and pressure transducer (14), pressure data by pressure transducer (14) feedback is adjusted pressure-regulating valve in real time, and it is identical with the corresponding operating mode exhaust back pressure of engine to make that testing table offers the gaseous tension of after-treatment device;
Described main control system (19) is used to receive, handle the information of each sensor, controls computing, finally drives the control that each actuator carries out flow, temperature, pressure, main gas componant.
2. the after-treatment device testing table of simulation diesel exhaust gas as claimed in claim 1 is characterized in that described gas sensor is gas analyzer or NOx sensor.
3. the after-treatment device testing table of simulation diesel exhaust gas as claimed in claim 1 is characterized in that described blower fan (2) adopts centrifugal, axial-flow type or diagonal flow type.
4. the after-treatment device testing table of simulation diesel exhaust gas as claimed in claim 1 is characterized in that blower fan (2), flowrate control valve (6) and pressure-regulating valve (13) all adopt hand gear, and realizes by simple manual operation.
5. the after-treatment device testing table of simulation diesel exhaust gas as claimed in claim 1 is characterized in that standard gas kind can specifically be set according to the needs of after-treatment device in the concrete quantity of described calibrating gas bottle (4), gas valve (5) and flowrate control valve (6) and the calibrating gas bottle.
6. the after-treatment device testing table of simulation diesel exhaust gas as claimed in claim 1 is characterized in that described pipeline (20) employing 304 and the making of above stainless steel.
7. as the after-treatment device testing table of any one described simulation diesel exhaust gas of claim 1-6, it is characterized in that described gas-heating apparatus (9) is electric heater (9).
8. as the after-treatment device testing table of any one described simulation diesel exhaust gas of claim 7, it is characterized in that described air cleaner (1), blower fan (2) and air flowmeter (3) are connected successively by pipeline; Described calibrating gas bottle (4), gas valve (5) and electric flow control valve (6) are connected successively by pipeline; The output terminal of described air flowmeter (3) is connected to the input end of described gas mixer (8) by pipeline; The output terminal of described electric flow control valve (6) connects a gas nozzle (7) by pipeline, and described gas nozzle (7) is arranged on the upstream of described gas mixer (8); The output terminal of described gas mixer (8) connects the after-treatment device of electric heater (9), electric press variable valve (13) and diesel exhaust gas successively by pipeline; Described temperature sensor (11) and gas sensor (12) are arranged on the downstream pipeline of electric heater (9), described pressure transducer (14) is arranged on the downstream pipeline of electric press variable valve (13), and described main control system (19) links to each other with described air flowmeter (3), temperature sensor (11), gas sensor (12) and the output terminal of pressure transducer (14).
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| CN102289964A (en) * | 2011-09-08 | 2011-12-21 | 南京韩威南冷制冷集团有限公司 | Test platform for simulating environment of comprehensive protection test of underground rescue capsule |
| CN103590879A (en) * | 2013-11-29 | 2014-02-19 | 长城汽车股份有限公司 | System and method for testing exhaust aftertreatment |
| CN106679982A (en) * | 2017-02-26 | 2017-05-17 | 上海倍绿环保科技有限公司 | Test bed device based on diesel engine after-treatment system performance test of combustor |
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| CN106679982A (en) * | 2017-02-26 | 2017-05-17 | 上海倍绿环保科技有限公司 | Test bed device based on diesel engine after-treatment system performance test of combustor |
| CN106855463A (en) * | 2017-02-26 | 2017-06-16 | 上海倍绿环保科技有限公司 | Diesel engine post-processing system Accelarated aging test bench frame apparatus based on burner |
| CN107228762A (en) * | 2017-06-26 | 2017-10-03 | 湘潭大学 | A kind of test engine catalyst flowing and the experimental provision of conversion performance |
| CN107966391B (en) * | 2017-11-23 | 2020-10-16 | 常熟理工学院 | Method and device for verifying trapping efficiency of diesel particle trap under vehicle-mounted vibration condition |
| CN107966391A (en) * | 2017-11-23 | 2018-04-27 | 常熟理工学院 | Diesel particulate trap arresting efficiency verification method and device under vehicle-mounted vibration condition |
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| CN110057521A (en) * | 2019-04-09 | 2019-07-26 | 天津航天瑞莱科技有限公司 | Motor vehicle emission processor heat vibration pilot system |
| CN112304618A (en) * | 2019-08-02 | 2021-02-02 | 上海汽车集团股份有限公司 | GPF regenerating device of engine rack |
| CN110686890B (en) * | 2019-10-23 | 2021-08-27 | 中船动力有限公司 | On-line diesel engine air valve state detection method |
| CN110686890A (en) * | 2019-10-23 | 2020-01-14 | 中船动力有限公司 | On-line diesel engine air valve state detection method |
| CN110736622A (en) * | 2019-10-31 | 2020-01-31 | 中船动力研究院有限公司 | emission generation test device |
| CN112610310A (en) * | 2020-11-30 | 2021-04-06 | 沪东重机有限公司 | Large-scale marine diesel engine discharges aftertreatment system and simulation platform thereof |
| CN113670379A (en) * | 2021-08-13 | 2021-11-19 | 山东交通学院 | Tail gas pollutant emission simulation device and method |
| CN114485996A (en) * | 2021-12-22 | 2022-05-13 | 中国航空工业集团公司北京长城计量测试技术研究所 | Alternating airflow temperature generating device based on supersonic jet element |
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