CN106289789A - SCR catalytic muffler low temperature urea crystals simulation experiment system - Google Patents
SCR catalytic muffler low temperature urea crystals simulation experiment system Download PDFInfo
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- CN106289789A CN106289789A CN201610786321.8A CN201610786321A CN106289789A CN 106289789 A CN106289789 A CN 106289789A CN 201610786321 A CN201610786321 A CN 201610786321A CN 106289789 A CN106289789 A CN 106289789A
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- scr catalytic
- catalytic muffler
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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)
- General Physics & Mathematics (AREA)
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Abstract
nullThe present invention relates to a kind of SCR catalytic muffler low temperature urea crystals simulation experiment system，Including hot-air system、Urea injection system、Nozzle cooling system and SCR catalytic muffler to be tested，Hot-air system includes blast heater、Hot air duct and choke valve，Described urea injection system includes urea tank and ejector pump，Described nozzle cooling system includes cooling pump、Pump water inlet pipe、Water pump outlet pipe、Nozzle cooling water inlet pipe、Pond and nozzle cooling water outlet pipe，The present invention simulates diesel engine exhaust by hot-air system，By the urea injecting quantity of carbamide during urea injection system simulation SCR catalytic muffler work，Control to enter the urea temperature of SCR catalytic muffler by nozzle cooling system，Thus realize the purpose of simulated engine stand worst cold case，The engine pedestal worst cold case utilizing simulation realizes testing the urea crystals under SCR catalytic muffler low temperature state.
Description
Technical field:
The present invention relates to the technical field of performance test of automobile SCR catalytic muffler equipment, be specifically related to a kind of SCR catalysis and eliminate the noise
Device low temperature urea crystals simulation experiment system.
Background technology:
Along with China's economic development and the quickening of infrastructure construction speed, China's auto output from 2002 325.12 ten thousand,
Be promoted to 2011 1841.89 ten thousand, increase nearly 6 times.In the end of the year 2002, China's motor vehicles for civilian use recoverable amount has just broken through 20,000,000
?；At the end of 2011, motor vehicles for civilian use recoverable amount i.e. reaches 1.06 hundred million.The volume of production of automobile and the increase of recoverable amount, cause tail gas band
The pollution come is increasingly severe.Along with country's pay attention to day by day to energy-saving and emission-reduction, it is achieved energy-conservation, low-carbon (LC), environmental protection have become China
The core objective of " 12 ", the emission problem of automobile industry is shifted onto on the teeth of the storm of energy-saving and emission-reduction by this.Diesel oil is at internal combustion
Utilization on machine gets more and more, and especially in terms of passenger vehicle, commercial car, almost diesel vehicle accounts for more than 80%.Along with diesel engine
Consumption increases, and diesel emission Environmental capacity is the big problem that countries in the world face.
SCR catalytic muffler occupies leading position on diesel engine vent gas processes, and is always for low temperature urea crystals
The major issue that puzzlement low temperature exhaust gas processes, if do not processed 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 muffler is insufficient, easily cause crystallization,
Blocking acoustic filter, thus affect the vent gas treatment of diesel engine under low temperature state；Therefore, it is necessary to SCR catalytic muffler low temperature shape
Urea crystals under state is simulated test, to determine SCR catalytic muffler vent gas treatment effect under low temperature state.Mesh
Before, the urea crystals under SCR catalytic muffler low temperature state is tested, needs to carry out on diesel engine machine frame, need big
The preparation of amount, the working cycle is long, it is desirable to condition is high, and expense is high, causes experimentation cost high, and test efficiency is low.
Summary of the invention:
In sum, in order to overcome the deficiency of prior art problem, the invention provides a kind of SCR catalytic muffler low temperature carbamide
Solidification imitation pilot system, simulates diesel engine exhaust by hot-air system, is disappeared by urea injection system simulation SCR catalysis
The urea injecting quantity of carbamide during the work of sound device, controls to enter the urea temperature of SCR catalytic muffler by nozzle cooling system, from
And realize the purpose of simulated engine stand worst cold case, utilize the engine pedestal worst cold case of simulation to realize SCR and be catalyzed
Urea crystals test under acoustic filter low temperature state.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of SCR catalytic muffler low temperature urea crystals simulation experiment system, wherein: include hot-air system, urea injection system,
Nozzle cooling system and SCR catalytic muffler to be tested, described hot-air system includes blast heater, hot air duct and throttling
Valve, the air outlet of blast heater connects the air inlet of SCR catalytic muffler to be tested by hot air duct, hot air duct sets
Being equipped with choke valve, described urea injection system includes urea tank and ejector pump, and urea tank internal memory stores up liquid urea, urea tank
The liquid outlet inlet by duct injection pump, the liquid outlet of ejector pump passes through the SCR catalytic muffler that pipeline communication is to be tested
Nozzle, described nozzle cooling system includes cooling pump, pump water inlet pipe, water pump outlet pipe, nozzle cooling water inlet pipe, pond and spray
Blunt but outlet pipe, described pond internal memory contains cooling water, and the water inlet of cooling pump connects pond, cooling by pump water inlet pipe
The outlet of pump is connected SCR catalysis to be tested disappeared by water pump outlet pipe connection nozzle cooling water inlet pipe, nozzle cooling water inlet pipe
The water inlet of the nozzle of sound device, the outlet of the nozzle of described SCR catalytic muffler to be tested passes through nozzle cooling water outlet
Pipe connection pond.
Technical scheme is it may also is that realize: described blast heater and SCR to be tested be catalyzed and disappear
Current divider box it is provided with on hot air duct between sound device, the air inlet of the air outlet connection current divider box of described blast heater, institute
At least three venthole it is provided with, entering of the SCR catalytic muffler that the connection of one of them venthole is to be tested on the current divider box stated
QI KOU, remaining venthole arranges isocon, and isocon is provided with flow divider.
Technical scheme it may also is that realize: described blast heater is hot-air blower.
Technical scheme it may also is that realize: described water pump outlet pipe by overflow pipe connect pond,
Ball valve it is provided with on overflow pipe.
The invention have the benefit that
1, the present invention simulates diesel engine exhaust by hot-air system, simulates SCR catalytic muffler by urea injection system
The urea injecting quantity of carbamide during work, controls to enter the urea temperature of SCR catalytic muffler by nozzle cooling system, thus real
The purpose of existing simulated engine stand worst cold case, utilizes the engine pedestal worst cold case of simulation to realize SCR catalysis and eliminates the noise
Urea crystals test under device low temperature state.
2, present configuration is simple, esy to use, safe and reliable, it is simple to make, it is possible to the actual shape of accurate simulation electromotor
State, breaches the bottleneck that crystallization trial just can must be carried out by engine pedestal, decreases testing crew extensive work amount, and
Greatly reduce Corporate Test expense expenditure；This testing stand temperature control curve is splendid, and flow-control is extremely stable, and carbamide sprays
Control extremely accurate, result of the test clock like precision, it is possible to the crystal property of accurate evaluation SCR catalytic muffler；Greatly shorten
Test period, promote product development progress.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention:
The present invention is described in further detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of SCR catalytic muffler low temperature urea crystals simulation experiment system, including hot-air system, carbamide
Spraying system, nozzle cooling system and SCR catalytic muffler 1 to be tested, described hot-air system includes blast heater 2, heat
Wind pipeline 3 and choke valve 4, the air outlet of blast heater 2 connects entering of SCR catalytic muffler 1 to be tested by hot air duct 3
QI KOU, hot air duct 3 is provided with choke valve 4, the hot air duct between blast heater 2 and SCR catalytic muffler 1 to be tested
Current divider box 13 it is provided with on 3, the air inlet of the air outlet connection current divider box 13 of described blast heater 2, current divider box 13 is arranged
Three ventholes, a middle venthole are had to connect the air inlet of SCR catalytic muffler 1 to be tested by hot air duct 3,
It is provided with choke valve 4 on hot air duct 3, the venthole of both sides arranges isocon 14, isocon 14 is provided with flow divider 15.
Blast heater 2 is hot-air blower.Urea injection system includes that urea tank 5 and ejector pump 6, urea tank 5 internal memory put liquid urea, carbamide
The liquid outlet of tank 5 inlet by duct injection pump 6, the liquid outlet of ejector pump 6 is catalyzed by the SCR that pipeline communication is to be tested
The nozzle of acoustic filter 1, described nozzle cooling system includes the cooling water inlet of cooling pump 7, pump water inlet pipe 8, water pump outlet pipe 9, nozzle
Pipe 10, pond 11 and nozzle cooling water outlet pipe 12, described pond 11 internal memory contains cooling water, and the water inlet of cooling pump 7 passes through
Pump water inlet pipe 8 connects pond 11, and the outlet of cooling pump 7 connects nozzle cooling water inlet pipe 10 and overflow pipe by water pump outlet pipe 9
16, nozzle cooling water inlet pipe 10 connects the water inlet of the nozzle of SCR catalytic muffler 1 to be tested, and overflow pipe 16 connects pond
11, overflow pipe 16 is provided with ball valve 17.The outlet of the nozzle of SCR catalytic muffler 1 to be tested is cooled down out by nozzle
Water pipe 12 connects pond 11.
When needs carry out low temperature urea crystals simulation test to SCR catalytic muffler, starting cooling pump 7, cooling pump 7 is taken out
Cooling water in water intaking pond 11, is delivered into SCR catalytic muffler 1 nozzle to be tested by this cooling water, and SCR is catalyzed by cooling water
After the cooling of acoustic filter nozzle, flow back into pond 11 from nozzle cooling water outlet pipe 12；Start ejector pump 6, ejector pump 6 extracted urea tank
Liquid urea in 5, is delivered into liquid urea in SCR catalytic muffler 1 to be tested, by the valve in regulation urea tank 5
Door scalable enters the emitted dose of the carbamide in SCR catalytic muffler 1 to be tested.Starting hot-air blower, hot blast is led to by hot-air blower
Cross hot air duct 3 and be delivered into SCR catalytic muffler 1 to be tested, by regulation choke valve 4, can control to enter to be tested
The flow of the hot blast in SCR catalytic muffler 1, it is possible to the truest by isocon 14 and reasonable adjusting flow divider 15
Simulated engine low temperature low flow rate condition.Test, the urea crystals situation of inspection SCR catalytic muffler to be tested, and
According to result of the test, this SCR catalytic muffler is made evaluation.Complete SCR catalytic muffler is carried out low temperature urea crystals simulation
During test.
Being noted that above-described embodiment is illustrative not limiting to technical solution of the present invention, art is general
The equivalent leading to technical staff or other amendment made according to prior art, as long as beyond technical solution of the present invention
Thinking and scope, within should be included in interest field of the presently claimed invention.
Claims (4)
1. a SCR catalytic muffler low temperature urea crystals simulation experiment system, it is characterised in that: include hot-air system, carbamide
Spraying system, nozzle cooling system and SCR catalytic muffler (1) to be tested, described hot-air system includes blast heater
(2), hot air duct (3) and choke valve (4), the air outlet of blast heater (2) connects SCR to be tested by hot air duct (3)
The air inlet of catalytic muffler (1), hot air duct (3) is provided with choke valve (4), and described urea injection system includes carbamide
Tank (5) and ejector pump (6), urea tank (5) internal memory storage liquid urea, the liquid outlet of urea tank (5) is by duct injection pump (6)
Inlet, the liquid outlet of ejector pump (6) passes through the nozzle of pipeline communication SCR catalytic muffler (1) to be tested, described nozzle
Cooling system includes cooling pump (7), pump water inlet pipe (8), water pump outlet pipe (9), nozzle cooling water inlet pipe (10), pond (11) and spray
Blunt but outlet pipe (12), described pond (11) internal memory contains cooling water, and the water inlet of cooling pump (7) passes through pump water inlet pipe
(8) connection pond (11), the outlet of cooling pump (7) is by water pump outlet pipe (9) connection nozzle cooling water inlet pipe (10), and nozzle is cold
But water inlet pipe (10) connects the water inlet of nozzle of SCR catalytic muffler (1) to be tested, described SCR catalysis to be tested
The outlet of the nozzle of acoustic filter (1) is by nozzle cooling water outlet pipe (12) connection pond (11).
SCR catalytic muffler low temperature urea crystals simulation experiment system the most according to claim 1, it is characterised in that: institute
It is provided with current divider box (13) on hot air duct (3) between blast heater (2) and the SCR catalytic muffler (1) to be tested stated,
The air inlet of air outlet connection current divider box (13) of described blast heater (2), described current divider box (13) is provided with at least
Three ventholes, the air inlet of the SCR catalytic muffler (1) that the connection of one of them venthole is to be tested, remaining venthole sets
Put isocon (14), isocon (14) is provided with flow divider (15).
SCR catalytic muffler low temperature urea crystals simulation experiment system the most according to claim 1, it is characterised in that: institute
The blast heater (2) stated is hot-air blower.
SCR catalytic muffler low temperature urea crystals simulation experiment system the most according to claim 1, it is characterised in that: institute
The water pump outlet pipe (9) stated, by overflow pipe (16) connection pond (11), overflow pipe (16) is provided with ball valve (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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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| CN106289789A true CN106289789A (en) | 2017-01-04 |
| CN106289789B CN106289789B (en) | 2018-07-06 |
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Cited By (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 |
| CN110848003A (en) * | 2019-11-15 | 2020-02-28 | 中国重汽集团济南动力有限公司 | Air-assisted SCR urea consumption low-fault simulation device and method |
| CN112084725A (en) * | 2020-09-09 | 2020-12-15 | 中自环保科技股份有限公司 | Method for evaluating performance of SCR mixer of diesel internal combustion engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (5)
| 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 |
| CN110848003A (en) * | 2019-11-15 | 2020-02-28 | 中国重汽集团济南动力有限公司 | Air-assisted SCR urea consumption low-fault simulation device and method |
| CN112084725A (en) * | 2020-09-09 | 2020-12-15 | 中自环保科技股份有限公司 | Method for evaluating performance of SCR mixer of diesel internal combustion engine |
| 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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| CN106289789B (en) | 2018-07-06 |
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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. |
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