CN106289789B - SCR catalytic muffler low temperature urea crystals simulation experiment systems - Google Patents
SCR catalytic muffler low temperature urea crystals simulation experiment systems Download PDFInfo
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- CN106289789B CN106289789B CN201610786321.8A CN201610786321A CN106289789B CN 106289789 B CN106289789 B CN 106289789B CN 201610786321 A CN201610786321 A CN 201610786321A CN 106289789 B CN106289789 B CN 106289789B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
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- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to a kind of SCR catalytic mufflers low temperature urea crystals simulation experiment systems,Including hot-air system,Urea injection system,Nozzle cooling system and SCR catalytic mufflers to be tested,Hot-air system includes blast heater,Hot air duct and throttle valve,The urea injection system includes urea tank and jet pump,The nozzle cooling system includes cooling pump,Pump water inlet pipe,Water pump outlet pipe,Nozzle cools down water inlet pipe,Pond and nozzle cooling water outlet pipe,The present invention simulates diesel engine exhaust by hot-air system,The urea injecting quantity of urea when SCR catalytic mufflers work is simulated by urea injection system,Enter the urea temperature of SCR catalytic mufflers by nozzle cooling system control,So as to fulfill the purpose of simulated engine rack worst cold case,It is realized using the engine pedestal worst cold case of simulation and the urea crystals under SCR catalytic muffler low-temperature conditions is tested.
Description
Technical field
The present invention relates to the technical field of performance test of automobile SCR catalytic muffler equipment, and in particular to a kind of SCR catalysis
Silencer low temperature urea crystals simulation experiment system.
Background technology
With China's economic development and the quickening of infrastructure construction speed, China's auto output was from 2002 325.12 ten thousand
, be promoted to 2011 1841.89 ten thousand, increase nearly 6 times.The end of the year 2002, China's motor vehicles for civilian use ownership just break through 2000
Ten thousand；At year ends 2011, motor vehicles for civilian use ownership is i.e. up to 1.06 hundred million.The increase of the output and ownership of automobile, leads to tail gas
The pollution brought is increasingly severe.As country is to the pay attention to day by day of energy-saving and emission-reduction, realize that energy saving, low-carbon, environmental protection have become me
The core objective of state's " 12th Five-Year Plan ", this shifts the emission problem of automobile industry on the teeth of the storm of energy-saving and emission-reduction onto.Including diesel oil
Utilization in combustion engine is more and more, and especially in terms of car, commercial car, almost diesel vehicle is accounted for more than 80%.With diesel engine
Dosage increase, diesel emission contamination control is the big problem that countries in the world face.
SCR catalytic mufflers occupy leading position in diesel engine vent gas processing, and are always for low temperature urea crystals
Perplex the major issue of low temperature exhaust gas processing, if do not handled cryogenic engine tail gas, will be unable to meet national legislation to diesel engine
The requirement of vent gas treatment；And under low-temperature condition, the urea pyrolysis hydrolysis in SCR catalytic mufflers is insufficient, easily causes crystallization,
Silencer is blocked, so as to influence the vent gas treatment of diesel engine under low-temperature condition；Therefore, it is necessary to SCR catalytic muffler low temperature shapes
Urea crystals under state carry out simulation test, to determine vent gas treatment effect of the SCR catalytic mufflers under low-temperature condition.Mesh
Before, the urea crystals under SCR catalytic muffler low-temperature conditions are tested, need to carry out on diesel engine machine frame, are needed big
The preparation of amount, work period are long, it is desirable that condition is high, and expense is high, causes experimentation cost high, test efficiency is low.
Invention content
In conclusion in order to overcome the shortcomings of prior art problem, the present invention provides a kind of SCR catalytic mufflers low temperature
Urea crystals simulation experiment system simulates diesel engine exhaust by hot-air system, simulates SCR by urea injection system and urges
The urea injecting quantity of urea when changing silencer work enters the urea temperature of SCR catalytic mufflers by nozzle cooling system control
Degree so as to fulfill the purpose of simulated engine rack worst cold case, is realized using the engine pedestal worst cold case of simulation to SCR
Urea crystals experiment under catalytic muffler low-temperature condition.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of SCR catalytic mufflers low temperature urea crystals simulation experiment system, wherein：It is sprayed including hot-air system, urea
System, nozzle cooling system and SCR catalytic mufflers to be tested, the hot-air system include blast heater, hot air duct
And throttle valve, the air outlet of blast heater connect the air inlet of SCR catalytic mufflers to be tested, hot blast pipe by hot air duct
Throttle valve is provided on road, the urea injection system includes urea tank and jet pump, urea tank memory storage liquid urea, urine
The inlet that the liquid outlet of plain tank is pumped by duct injection, the liquid outlet of jet pump connect SCR to be tested by pipeline and are catalyzed
The nozzle of silencer, the nozzle cooling system include cooling pump, pump water inlet pipe, water pump outlet pipe, nozzle cooling water inlet pipe, water
Pond and nozzle cooling water outlet pipe, the pond memory contain cooling water, and the water inlet of cooling pump connects water by pump water inlet pipe
Pond, the water outlet of cooling pump connect nozzle by water pump outlet pipe and cool down water inlet pipe, and nozzle cooling water inlet pipe connects SCR to be tested
The water inlet of the nozzle of catalytic muffler, the water outlet of the nozzle of the SCR catalytic mufflers to be tested are cold by nozzle
But outlet pipe connection pond.
Technical scheme of the present invention may also is that realization：The blast heater disappears with SCR catalysis to be tested
Current divider box, the air admission hole of the air outlet connection current divider box of the blast heater, institute are provided on hot air duct between sound device
Be provided at least three ventholes on the current divider box stated, one of venthole connect SCR catalytic mufflers to be tested into
Gas port sets isocon on remaining venthole, flow divider is provided on isocon.
Technical scheme of the present invention may also is that realization：The blast heater is air-heater.
Technical scheme of the present invention may also is that realization：The water pump outlet pipe connects pond by overflow pipe,
Ball valve is provided on overflow pipe.
Beneficial effects of the present invention are：
1st, the present invention simulates diesel engine exhaust by hot-air system, and simulating SCR catalysis by urea injection system disappears
The urea injecting quantity of urea when sound device works enters the urea temperature of SCR catalytic mufflers by nozzle cooling system control, from
And realize the purpose of simulated engine rack worst cold case, it is realized using the engine pedestal worst cold case of simulation and SCR is catalyzed
Urea crystals experiment under silencer low-temperature condition.
2nd, the configuration of the present invention is simple, esy to use, safe and reliable, making simply, being capable of the practical shapes of accurate simulation engine
State breaches the bottleneck that crystallization trial must could be carried out by engine pedestal, reduces testing crew heavy workload, and
Greatly reduce company's testing expenses expenditure；This testing stand temperature control curve is splendid, and flow control is extremely stable, urea injection
Control is extremely accurate, and result of the test is extremely accurate, is capable of the crystal property of accurate evaluation SCR catalytic mufflers；Greatly shorten
Test period promotes product development process.
Description of the drawings：
Fig. 1 is the structural diagram of the present invention.
Specific embodiment：
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of SCR catalytic mufflers low temperature urea crystals simulation experiment system, including hot-air system, urea
Spraying system, nozzle cooling system and SCR catalytic mufflers 1 to be tested, the hot-air system include blast heater 2, heat
Wind pipeline 3 and throttle valve 4, the air outlet of blast heater 2 connected by hot air duct 3 SCR catalytic mufflers 1 to be tested into
Gas port is provided with throttle valve 4, the hot air duct between blast heater 2 and SCR catalytic mufflers 1 to be tested on hot air duct 3
Current divider box 13 is provided on 3, the air outlet of the blast heater 2 connects the air admission hole of current divider box 13, set on current divider box 13
There are three venthole, intermediate venthole connects the air inlet of SCR catalytic mufflers 1 to be tested by hot air duct 3,
Throttle valve 4 is provided on hot air duct 3, isocon 14 on the venthole of both sides is set, flow divider 15 is provided on isocon 14.
Blast heater 2 is air-heater.Urea injection system includes urea tank 5 and jet pump 6, and 5 memory of urea tank puts liquid urea, urea
The liquid outlet of tank 5 pumps 6 inlet by duct injection, and the liquid outlet of jet pump 6 connects SCR to be tested by pipeline and is catalyzed
The nozzle of silencer 1, the nozzle cooling system include cooling pump 7, pump water inlet pipe 8, water pump outlet pipe 9, nozzle cooling water inlet
Pipe 10, pond 11 and nozzle cooling water outlet pipe 12,11 memory of pond contain cooling water, and the water inlet of cooling pump 7 passes through
Pump water inlet pipe 8 connects pond 11, and the water outlet of cooling pump 7 connects nozzle by water pump outlet pipe 9 and cools down water inlet pipe 10 and overflow pipe
16, nozzle cooling water inlet pipe 10 connects the water inlet of the nozzle of SCR catalytic mufflers 1 to be tested, and overflow pipe 16 connects pond
11, ball valve 17 is provided on overflow pipe 16.The water outlet of the nozzle of SCR catalytic mufflers 1 to be tested is cooled down out by nozzle
Water pipe 12 connects pond 11.
When needing to carry out low temperature urea crystals simulation test to SCR catalytic mufflers, start cooling pump 7, cooling pump 7 is taken out
The cooling water fetched water in pond 11 conveys the cooling water into 1 nozzle of SCR catalytic mufflers to be tested, and cooling water is catalyzed SCR
After the cooling of silencer nozzle, from the reflux intake pool 11 of nozzle cooling water outlet pipe 12；Start jet pump 6,6 extracted urea tank of jet pump
Liquid urea in 5 conveys liquid urea into SCR catalytic mufflers 1 to be tested, by adjusting the valve in urea tank 5
The adjustable emitted dose for entering the urea in SCR catalytic mufflers 1 to be tested of door.Start air-heater, air-heater leads to hot wind
It crosses hot air duct 3 to convey into SCR catalytic mufflers 1 to be tested, by adjusting throttle valve 4, can control into be tested
It is true to the full extent also can to adjust flow divider 15 by isocon 14 and rationally for the flow of hot wind in SCR catalytic mufflers 1
Simulated engine low temperature low flow rate condition.It is tested, checks the urea crystals situation of SCR catalytic mufflers to be tested, and
Evaluation is made to the SCR catalytic mufflers according to result of the test.It completes to carry out low temperature urea crystals simulation to SCR catalytic mufflers
During experiment.
It is noted that above-described embodiment is to the illustrative and not limiting of technical solution of the present invention, technical field is general
The equivalent replacement of logical technical staff or the other modifications made according to the prior art, as long as not exceeding technical solution of the present invention
Thinking and range should be included within interest field of the presently claimed invention.
Claims (4)
1. a kind of SCR catalytic mufflers low temperature urea crystals simulation experiment system, it is characterised in that：Including hot-air system, urea
Spraying system, nozzle cooling system and SCR catalytic mufflers to be tested（1）, the hot-air system includes blast heater
（2）, hot air duct（3）And throttle valve（4）, blast heater（2）Air outlet pass through hot air duct（3）Connect SCR to be tested
Catalytic muffler（1）Air inlet, hot air duct（3）On be provided with throttle valve（4）, the urea injection system includes urea
Tank（5）And jet pump（6）, urea tank（5）Memory storage liquid urea, urea tank（5）Liquid outlet jet pump is connected by pipeline
（6）Inlet, jet pump（6）Liquid outlet SCR catalytic mufflers to be tested are connected by pipeline（1）Nozzle, it is described
Nozzle cooling system include cooling pump（7）, pump water inlet pipe（8）, water pump outlet pipe（9）, nozzle cooling water inlet pipe（10）, pond
（11）And nozzle cooling water outlet pipe（12）, the pond（11）Memory contains cooling water, cooling pump（7）Water inlet pass through pump
Water inlet pipe（8）Connect pond（11）, cooling pump（7）Water outlet pass through water pump outlet pipe（9）Connect nozzle cooling water inlet pipe（10）,
Nozzle cools down water inlet pipe（10）Connect SCR catalytic mufflers to be tested（1）Nozzle water inlet, described is to be tested
SCR catalytic mufflers（1）The water outlet of nozzle pass through nozzle cooling water outlet pipe（12）Connect pond（11）.
2. SCR catalytic mufflers low temperature urea crystals simulation experiment system according to claim 1, it is characterised in that：Institute
The blast heater stated（2）With SCR catalytic mufflers to be tested（1）Between hot air duct（3）On be provided with current divider box（13）,
The blast heater（2）Air outlet connection current divider box（13）Air admission hole, the current divider box（13）On be provided at least
Three ventholes, one of venthole connect SCR catalytic mufflers to be tested（1）Air inlet, set on remaining venthole
Put isocon（14）, isocon（14）On be provided with flow divider（15）.
3. SCR catalytic mufflers low temperature urea crystals simulation experiment system according to claim 1, it is characterised in that：Institute
The blast heater stated（2）For air-heater.
4. SCR catalytic mufflers low temperature urea crystals simulation experiment system according to claim 1, it is characterised in that：Institute
The water pump outlet pipe stated（9）Pass through overflow pipe（16）Connect pond（11）, overflow pipe（16）On be provided with ball valve（17）.
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| CN201610786321.8A CN106289789B (en) | 2016-08-31 | 2016-08-31 | SCR catalytic muffler low temperature urea crystals simulation experiment systems |
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| CN201610786321.8A CN106289789B (en) | 2016-08-31 | 2016-08-31 | SCR catalytic muffler low temperature urea crystals simulation experiment systems |
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| CN106289789B true CN106289789B (en) | 2018-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749452A (en) * | 2019-09-29 | 2020-02-04 | 江铃汽车股份有限公司 | Crystallization bench test method for automobile urea mixer |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458876A (en) * | 2017-12-05 | 2018-08-28 | 潍柴动力股份有限公司 | SCR post-processes urea crystals off-line simulation pilot system |
| CN108535019A (en) * | 2018-03-07 | 2018-09-14 | 潍柴动力股份有限公司 | A kind of SCR solidification imitations pilot system |
| CN110848003B (en) * | 2019-11-15 | 2021-06-01 | 中国重汽集团济南动力有限公司 | Air-assisted SCR urea consumption low-fault simulation method |
| CN112084725B (en) * | 2020-09-09 | 2022-06-24 | 中自环保科技股份有限公司 | Method for evaluating performance of SCR mixer of diesel internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19924029C2 (en) * | 1999-05-26 | 2001-05-23 | Porsche Ag | Method for monitoring the function of an exhaust gas aftertreatment system |
| CN202033195U (en) * | 2010-12-17 | 2011-11-09 | 杭州银轮科技有限公司 | Postprocessing apparatus testing stand simulating diesel engine exhaust |
| CN102147335B (en) * | 2010-12-31 | 2013-08-14 | 潍柴动力股份有限公司 | Method for testing unfreezing capacity of SCR (semiconductor control rectifier) system and system therefor |
| CN103573359B (en) * | 2012-08-01 | 2015-11-18 | 北汽福田汽车股份有限公司 | The urea crystals of the SCR exhaust treatment system of motor inspects method |
| CN103573358B (en) * | 2012-08-01 | 2015-11-18 | 北汽福田汽车股份有限公司 | The urea crystals of the SCR exhaust treatment system of motor inspects method |
| CN105545436B (en) * | 2016-01-19 | 2018-02-27 | 江苏大学 | A kind of experimental rig for being used to improve SCR system transformation efficiency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749452A (en) * | 2019-09-29 | 2020-02-04 | 江铃汽车股份有限公司 | Crystallization bench test method for automobile urea mixer |
| CN110749452B (en) * | 2019-09-29 | 2021-05-07 | 江铃汽车股份有限公司 | Crystallization bench test method for automobile urea mixer |
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Effective date of registration: 20180531 Address after: 450016 Henan Zhengzhou economic and Technological Development Zone twenty-fifth Avenue South five road 366 office building 205 Applicant after: ZHENGZHOU JINGYIDA ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 450016 69 Avenue Eighth National Economic and Technological Development Zone, Zhengzhou, Henan Applicant before: ZHENGZHOU JINGYIDA AUTO PARTS Co.,Ltd. |
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Effective date of registration: 20220822 Address after: 450000 No. 69, 8th Street, economic and Technological Development Zone, Zhengzhou City, Henan Province Patentee after: ZHENGZHOU JINGYIDA AUTO PARTS Co.,Ltd. Address before: 450016 Henan Zhengzhou economic and Technological Development Zone twenty-fifth Avenue South five road 366 office building 205 Patentee before: ZHENGZHOU JINGYIDA ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |