CN110530642A - A kind of burner test-bed and the mixer stable state crystallization trial method based on burner - Google Patents
A kind of burner test-bed and the mixer stable state crystallization trial method based on burner Download PDFInfo
- Publication number
- CN110530642A CN110530642A CN201910930671.0A CN201910930671A CN110530642A CN 110530642 A CN110530642 A CN 110530642A CN 201910930671 A CN201910930671 A CN 201910930671A CN 110530642 A CN110530642 A CN 110530642A
- Authority
- CN
- China
- Prior art keywords
- burner
- test
- fuel
- stable state
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002425 crystallisation Methods 0.000 title claims description 33
- 230000008025 crystallization Effects 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 26
- 239000000446 fuel Substances 0.000 claims abstract description 70
- 238000012360 testing method Methods 0.000 claims abstract description 52
- 238000002156 mixing Methods 0.000 claims abstract description 31
- 239000002828 fuel tank Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 70
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 35
- 239000004202 carbamide Substances 0.000 claims description 35
- 238000000605 extraction Methods 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000004088 simulation Methods 0.000 abstract description 11
- 238000011161 development Methods 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- 238000012805 post-processing Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010998 test method Methods 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000002551 biofuel Substances 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 230000008450 motivation Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000007867 post-reaction treatment Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012942 design verification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G01M15/02—Details or accessories of testing apparatus
Abstract
The invention discloses a kind of burner test-beds, including control cabinet, the fuel tank connecting with control cabinet, burner, are equipped with several fuel cavities in fuel tank, each fuel cavity is connect with burner respectively, and air inlet, exhaust outlet are provided on burner；When test, air inlet is connect with supply air system, and exhaust outlet is connect with preprocessor.Burner test-bed of the invention is equipped with several fuel cavities, each fuel cavity passes through in piping connection to mixing chamber respectively, the fuel of each fuel cavity inputs in burner after full and uniform mixing again in mixing chamber to burn, the tail gas generated after burning directly inputs in preprocessor, in input preprocessor is the tail gas generated after burning, guarantee that the gas component of burner output is identical as the gas component of true motor exhaust, ensure burner output tail gas can accurately simulated engine tail gas truth, simulation accuracy is high.
Description
Technical field
The present invention relates to post processor of engine design verification technical field, especially a kind of burner test-bed and base
In the mixer stable state crystallization trial method of burner.
Background technique
Preprocessor in engine exhaust system is mainly used for post-processing vehicle exhaust, will be in vehicle exhaust
Nitrogen oxides (NOX), hydrocarbon (CH), the pernicious gases such as hydrocarbon (CO) be converted into nitrogen (N2), water (H2O), two
Carbonoxide (CO2) etc..Currently, diesel engine state six is frequently with DOC(oxidative catalyst)+DPF(particulate filter)+SCR (choosing
Selecting property catalysis reduction) technology post-processes exhaust emissions, urea tank is installed in exhaust pipe, the urea conduct in urea tank
Reducing agent is sprayed into exhaust pipe by nozzle, the nitrogen oxides (NO in tail gasX) harmless nitrogen is generated under the effect of the catalyst
Gas (N2) and water (H2O), finally it is discharged from exhaust pipe, to achieve energy-saving and emission reduction purposes.Six stage of state since regulation adds sternly,
Higher to the requirement of urea accuracy of spray, the crystallization of control urea in a mixer is the key that improve post-processing transformation efficiency.
A kind of diesel SCR after-treatment system exhaust pipe urea crystals are disclosed in Chinese invention patent CN106226085B
Test method includes the following steps: P1: the selection of test engine；P2: engine machine hot running-in；P3: engine performance and original
Begin to discharge confirmation；P4: confirmation after-treatment system is working properly, SCR aftertreatment system discharge confirmation；P5:SCR system exhaust pipe knot
Brilliant test method: test period be 3 hours, be divided into the WHTC(transient cycle of 1 hour) circulation it is low with the low temperature of 2 hours
Extraction flow limiting condition steady state test circulation, test is completed to check inside SCR catalyst and exhaust pipe urea crystals situation；
P6: determine whether SCR aftertreatment system crystallization trial passes through.There are the following problems for this verification method: (1) urea crystals are tried
Proved recipe method is the verification method based on engine pedestal, and engine pedestal is needed to obtain target engine first, that is, needed fixed
After selecting suitable engine specimen in the engine model of type or producing model machine according to new engine development scheme,
Corresponding bench test is carried out on engine specimen.Building for engine pedestal needs to spend longer time, cost of labor
It is higher.And engine needs also to want after test by the longer engine thermal period of adjustment before being tested
By longer engine cool process, duration needed for entire complete test process is longer.(2) the urea crystals test method
It can only be tested on existing engine pedestal, not have the engine options of model machine for design scheme has only been determined also,
The test method cannot be used to carry out test assessment, application range is limited.
A kind of diesel engine post-processing system based on burner is disclosed in Chinese utility model patent CN206638424U
Testing stand for performance test device, the device are the diesel engine post-processing system testing stand for performance test dress based on burner
It sets, by controlling oil spout, igniting, burning, simulates diesel engine vent gas.The air that the frequency conversion fan of the device generates is being mixed and burned
The exhaust generated after Duan Jinhang burning enters dilution cavity, and the diluent air generated in dilution cavity with dilution air is mixed
It closes.The device is diluted mixing to the exhaust after burning, the diluent air that dilution air provides be the concentration without burning compared with
Low air dilutes and contains the gas componant without burning in mixed gas, gas component and reality in mixed gas
It is had a certain difference between gas component in diesel engine vent gas, the truth of diesel engine vent gas cannot be simulated very accurately,
It is poor to simulate accuracy.Test-bed of the device primarily directed to diesel engine post-processing system, smaller scope of application.
Summary of the invention
The applicant is directed to the above-mentioned existing diesel engine post-processing system testing stand for performance test device based on burner
Simulation accuracy it is poor；Diesel SCR after-treatment system exhaust pipe urea crystals test method is based on engine pedestal
Verification method, provides a kind of reasonable burner test-bed at the disadvantages of building time-consuming, high labor cost there are engine pedestal
And the mixer stable state crystallization trial method based on burner, it is high that burner simulates accuracy；Simulation survey is carried out based on burner
Examination, burner obtain simply, build simply, reduce cost.
The technical solution adopted in the present invention is as follows:
A kind of burner test-bed, including control cabinet, the fuel tank being connect with control cabinet, burner, if being equipped in fuel tank
Dry fuel cavity, each fuel cavity are connect with burner respectively, and air inlet, exhaust outlet are provided on burner；When test, air inlet
Mouth is connect with supply air system, and exhaust outlet is connect with preprocessor.
As a further improvement of the above technical scheme:
Mixing chamber is provided between fuel tank and burner, each fuel cavity of fuel tank is connect with mixing chamber respectively, each combustion
The first solenoid valve, first flowmeter are provided between material chamber and mixing chamber；The second electromagnetism is provided between mixing chamber and burner
Valve, second flowmeter；Each first solenoid valve, second solenoid valve are connect with control cabinet respectively, adjustable first electricity of control cabinet
The aperture of magnet valve, second solenoid valve.
Burner test-bed of the invention be equipped with several fuel cavities, each fuel cavity pass through respectively piping connection to mix
It closes on chamber, the fuel of each fuel cavity inputs in burner after full and uniform mixing again in mixing chamber to burn, and generates after burning
Tail gas directly input in preprocessor, input the tail gas that generates after being burning in preprocessor, guarantee burner output
Gas component it is identical as the gas component of true motor exhaust, it is ensured that the tail gas of burner output can accurate simulation hair
The truth of motivation tail gas, simulation accuracy are high.
Tail-gas analyzer, third solenoid valve are connected on exhaust outlet, tail-gas analyzer, third solenoid valve and control cabinet connect
It connects, control cabinet controls the opening and closing of third solenoid valve according to the detection data of tail-gas analyzer.
Tail-gas analyzer, the third solenoid valve of burner test-bed of the invention are electrically connected with control cabinet, control cabinet root
According to the opening and closing of the detection data control third solenoid valve of tail-gas analyzer, the former number of rows inputted in detection data and control cabinet is not according to
Meanwhile third solenoid valve is in close state；When identical, third solenoid valve is opened, and bypass pipe is closed, and tail gas passes through third electromagnetism
Valve inputs in preprocessor, guarantees that the gas in input preprocessor matches with true motor exhaust, it is ensured that tail gas mould
Quasi- accuracy.
Identical fuel or different fuel are stored in several fuel cavities.
Identical fuel can be stored in each fuel cavity of burner test-bed of the invention, can also be stored different
Fuel, such as diesel oil, methanol, ethyl alcohol, bio-fuel can be sent out by exporting different fuel for diesel engine, gasoline
Motivation, natural gas engine or other new energy engines carry out former row's simulation, have a wide range of application.
DOC module, DPF module, mixer module, SCR+ASC module are set on preprocessor；It is arranged in mixer module
There is nozzle, nozzle is connected in urea tank by urea pump, and DCU module is provided on urea pump, and DCU module is electrically connected with control cabinet
It connects.
A kind of mixer stable state crystallization trial method based on burner carried out using the burner test-bed, packet
Include following steps:
I, burner test-bed is according to former number of rows according to simulated engine operating condition；
II, urea injecting quantity calibration；
III, after-treatment system stable state crystallization trial；
IV, test result determine.
The source that crystallization trial method of the invention uses burner test-bed to export as tail gas is based on burner
The test that platform carries out, for engine pedestal, structure, platform building, operation are simpler, and stage+module disassembly needs
The time to be spent is shorter, and cost of labor is lower.Warm-up times before burner test, the cooling time after test are shorter, drop
The low duration of entire test process.Using the exhaust emissions situation of burner test-bed simulated engine, for six rank of state
The engine of section can also be according to the performance parameter conduct that its design feature is calculated even if engine specimen can not obtain
Former number of rows is simulated according to input burner, obtains exporting with engine original number of rows according to the tail gas to match.
As a further improvement of the above technical scheme:
Before simulating operating condition, select the former number of rows of several operating points of engine according to input burner test-bed；Operating point
For several delivery temperatures in constant engine operating point and WHSC are lower, extraction flow is lower, the biggish work of the amount of injection
Condition point；The former number of rows evidence of several operating points is collected from existing engine, or is calculated according to the design feature of engine；It is former
Number of rows evidence is delivery temperature, extraction flow, gas component data.
Several rows in 13 operating points of declared working condition point and WHSC of point selection of operating conditions engine of the invention
Temperature degree is lower, extraction flow is lower, the amount of injection biggish operating point exists when preprocessor is run under these operating points
Biggish crystallization risk, therefore select the former number of rows of these operating points according to being tested, can accurately post-reaction treatment device
Crystallization situation.Former number of rows, can also be from having determined that design scheme, do not have sample also according to can both obtain from existing engine
It is obtained in the engine development scheme of machine, verifying assessment can be carried out to existing engine, it can also be to still in exploitation rank
The engine options of section carry out verifying assessment, expand application range.For being in the engine options of development phase, according to examination
The feedback of result is tested, the test basis and improvement direction of optimization can also be provided, the period of engine development is shortened, reduction is opened
The cost of hair.
Section III walk after-treatment system stable state crystallization trial the step of include:
A), after running cleaning operating condition to preprocessor, weigh to preprocessor, record data W0；
B), burner test-bed is run；
C), start DCU module；
D), under each operating point, it is separately operable the steady-cycle in stable state of 2h, 8h, and weigh respectively to preprocessor, records data
Wn-1、Wn-2。
To the judgement requirement of test result in Section III step are as follows:
1), after 2h steady-cycle in stable state, increased weight is greater than 5g, and test result is unqualified；
2), after 2h steady-cycle in stable state, increased weight is less than 5g, and after 8h steady-cycle in stable state, increased weight is greater than 30g, test result
It is unqualified；
3), after 2h steady-cycle in stable state, increased weight is less than 5g, and after 8h steady-cycle in stable state, increased weight is less than 30g, test result
It is qualified.
The ammonia nitrogen ratio selected in Section II step is 1.0-1.2.
Beneficial effects of the present invention are as follows:
Burner test-bed of the invention is equipped with several fuel cavities, and each fuel cavity passes through piping connection to mixing chamber respectively
On, the fuel of each fuel cavity inputs in burner the tail for burning, generating after burning again in mixing chamber after full and uniform mixing
Gas directly inputs in preprocessor, and inputting in preprocessor is the tail gas generated after burning, guarantees the gas of burner output
Body component is identical as the gas component of true motor exhaust, it is ensured that the tail gas of burner output can accurately simulated engine
The truth of tail gas, simulation accuracy are high.
Tail-gas analyzer, the third solenoid valve of burner test-bed of the invention are electrically connected with control cabinet, control cabinet root
According to the opening and closing of the detection data control third solenoid valve of tail-gas analyzer, the former number of rows inputted in detection data and control cabinet is not according to
Meanwhile third solenoid valve is in close state；When identical, third solenoid valve is opened, and bypass pipe is closed, and tail gas passes through third electromagnetism
Valve inputs in preprocessor, guarantees that the gas in input preprocessor matches with true motor exhaust, it is ensured that tail gas mould
Quasi- accuracy.
Identical fuel can be stored in each fuel cavity of burner test-bed of the invention, can also be stored different
Fuel, such as diesel oil, methanol, ethyl alcohol, bio-fuel can be sent out by exporting different fuel for diesel engine, gasoline
Motivation, natural gas engine or other new energy engines carry out former row's simulation, have a wide range of application.
The source that crystallization trial method of the invention uses burner test-bed to export as tail gas is based on burner
The test that platform carries out, for engine pedestal, structure, platform building, operation are simpler, and stage+module disassembly needs
The time to be spent is shorter, and cost of labor is lower.Warm-up times before burner test, the cooling time after test are shorter, drop
The low duration of entire test process.Using the exhaust emissions situation of burner test-bed simulated engine, for six rank of state
The engine of section can also be according to the performance parameter conduct that its design feature is calculated even if engine specimen can not obtain
Former number of rows is simulated according to input burner, obtains exporting with engine original number of rows according to the tail gas to match.
Several rows in 13 operating points of declared working condition point and WHSC of point selection of operating conditions engine of the invention
Temperature degree is lower, extraction flow is lower, the amount of injection biggish operating point exists when preprocessor is run under these operating points
Biggish crystallization risk, therefore select the former number of rows of these operating points according to being tested, can accurately post-reaction treatment device
Crystallization situation.Former number of rows, can also be from having determined that design scheme, do not have sample also according to can both obtain from existing engine
It is obtained in the engine development scheme of machine, verifying assessment can be carried out to existing engine, it can also be to still in exploitation rank
The engine options of section carry out verifying assessment, expand application range.For being in the engine options of development phase, according to examination
The feedback of result is tested, the test basis and improvement direction of optimization can also be provided, the period of engine development is shortened, reduction is opened
The cost of hair.
Detailed description of the invention
Fig. 1 is burner test-bed schematic diagram of the invention.
Fig. 2 is the experiment process figure of test method of the invention.
In figure: 1, control cabinet；2, fuel tank；3, the first fuel cavity；4, the second fuel cavity；5, third fuel cavity；6, the 4th
Fuel cavity；7, the first solenoid valve；8, first flowmeter；9, mixing chamber；10, second solenoid valve；11, second flowmeter；12, air inlet
Mouthful；13, burner；14, exhaust outlet；15, tail-gas analyzer；16, bypass pipe；17, third solenoid valve；18, preprocessor；19,
DOC module；20, DPF module；21, mixer module；22, SCR+ASC(the escaping of ammonia catalyst converter) module；23, urea tank；24,
DCU(urea injection control unit) module；25, urea pump；26, nozzle；27, nozzle carrier；28, urea solution.
Specific embodiment
Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in Figure 1, the fuel tank 2 of burner test-bed of the invention is by being electrically connected on control cabinet 1, fuel tank
It is in parallel in 2 to be equipped with several fuel cavities, be provided in the present embodiment the first fuel cavity 3, the second fuel cavity 4, third fuel cavity 5,
4th fuel cavity 6 can store identical fuel in each fuel cavity, can also store different fuel, as diesel oil, methanol,
Ethyl alcohol, bio-fuel etc. can be directed to diesel engine, petrol engine, natural gas engine by exporting different fuel
Or other new energy engines carry out former row's simulation, have a wide range of application；Four fuel cavities pass through piping connection to mixing chamber 9 respectively
On, be disposed with the first solenoid valve 7, first flowmeter 8 between each fuel cavity and mixing chamber 9, each first solenoid valve 7 with
Control cabinet 1 is electrically connected (not shown), the aperture of adjustable first solenoid valve 7 of control cabinet 1, to control each fuel cavity
Fuel flow rate, first flowmeter 8 is used to monitor the fuel flow rate of each fuel cavity output；Each fuel cavity can be according to specific
Former row require to adjust different fuel ratios, the fuel of output carries out full and uniform mixing in mixing chamber 9.Mixing chamber 9
By being provided with second solenoid valve 10, second flowmeter between mixing chamber 9 and burner 13 in piping connection to burner 13
11, second solenoid valve 10 is electrically connected (not shown) with control cabinet 1, the aperture of adjustable first solenoid valve 7 of control cabinet 1,
To control the output fuel flow rate of mixing chamber 9, second flowmeter 11 is used to monitor the fuel flow rate of the output of mixing chamber 9；Burning
For device 13 with control cabinet 1 by being electrically connected, control cabinet 1 can control the igniting of burner 13；Air inlet is provided on burner 13
12, exhaust outlet 14, air inlet 12 connect (not shown) with supply air system, and supply air system passes through air inlet 12 to burner 13
It is sent into the air of certain wind speed and air quantity, by being electrically connected (not shown), control cabinet 1 can be with for air inlet 12 and control cabinet 1
The aperture of air inlet 12 is controlled, to control the air quantity of supply air system feeding；Exhaust outlet 14 is connect with preprocessor 18, exhaust outlet
Third solenoid valve 17 is provided between 14 and preprocessor 18, the tail gas that burner 13 generates passes through the input post-processing of exhaust outlet 14
Crystallization trial is carried out in device 18；Tail-gas analyzer 15 is provided with by bypass pipe 16 on exhaust outlet 14, for detecting the tail of output
The data such as delivery temperature, extraction flow, the gas component of gas.Tail-gas analyzer 15, third solenoid valve 17 are electrically connected with control cabinet 1
(not shown), control cabinet 1 control the opening and closing of third solenoid valve 17, detection data according to the detection data of tail-gas analyzer 15
From the former number of rows that is inputted on control cabinet 1 according to it is different when, third solenoid valve 17 is in close state；When identical, third solenoid valve 17
It opens, bypass pipe 16 is closed, and tail gas is inputted in preprocessor 18 by third solenoid valve 17, is guaranteed in input preprocessor 18
Gas matches with true motor exhaust, it is ensured that the accuracy of tail gas simulation.Preprocessor 18 is set gradually from front to back
DOC module 19, DPF module 20, mixer module 21, SCR+ASC module 22；It is protruded into mixer module 21 by nozzle carrier 27
It is provided with nozzle 26, nozzle 26 is connected in urea tank 23 by urea pump 25, and DCU module 24, DCU is provided on urea pump 25
Module 24 is electrically connected (not shown) with control cabinet 1, and DCU module 24 is according to the former number of rows inputted on control cabinet 1 according to urea
The amount of injection is demarcated.
When carrying out mixer stable state crystallization trial using burner test-bed of the invention, inputted into control cabinet 1 former
Number of rows evidence, control cabinet 1 according to former number of rows according to open and adjust each first solenoid valve 7 and second solenoid valve 10 aperture, open
And the air inlet 12 of burner 13 is adjusted, fuel is inputted mixing chamber 9 according to respective fuel ratio by each fuel cavity, is being mixed
It is input in burner 13 after mixing in chamber 9, air is sent into burner 13 by supply air system by air inlet 12；Control cabinet 1
It controls burner 13 to light a fire, the fuel and air of input generate tail gas after burning in burner 13；Tail-gas analyzer 15 detects
The data such as delivery temperature, extraction flow, gas component at exhaust outlet 14, and will test data feedback to control cabinet 1, control cabinet
1, by former row's data comparison of the detection data received and input, when the two is identical, closes bypass pipe 16, opens third electromagnetism
Valve 17, tail gas input in preprocessor 18, successively modules of device 18 after post treatment, urea tank 23 by urea pump 25,
Nozzle 26 sprays into urea solution 28 into mixer module 21, and urea solution 28 is uniformly mixed in mixer module 21 laggard with tail gas
Enter SCR+ASC module, is reacted in SCR+ASC module.Burner test-bed of the invention is according to former number of rows according to adjusting
The fuel of the fuel ratio of each fuel cavity, each fuel cavity inputs burner 13 again in mixing chamber 9 after full and uniform mixing
Interior burning, the tail gas generated after burning directly input in preprocessor 18, and inputting in preprocessor 18 is to generate after burning
Tail gas, guarantee burner 13 export gas component it is identical as the gas component of true motor exhaust, it is ensured that burner
The tail gas of 13 outputs can accurately simulated engine tail gas truth, simulation accuracy is high.
As shown in Fig. 2, can be carried out preprocessor 18 based on burner using burner test-bed of the invention
Mixer stable state crystallization trial, the test method are that the verifying early period preprocessor 18 developed in preprocessor 18 whether there is knot
Brilliant risk, specifically comprises the following steps:
Step S1: engine data is collected；
Step S2: selection operating point；
Step S3: burner simulated engine operating condition；
Step S4: urea injecting quantity calibration；
Step S5: after-treatment system stable state crystallization trial；
Step S6: test result determines.
After being tested according to above-mentioned steps, obtained experimental result is compared with setting value: (1) test result is less than
Setting value then tests successfully, i.e., preprocessor 18 is met the requirements, and there is no the risks of crystallization；(2) test result is greater than setting
Value, then there is the risk of crystallization, need to optimize preprocessor 18, after optimization in test failure, preprocessor 18
Product is verified again according still further to step S5, step S6.
Step S1, it is necessary first to collect the related data of engine, mainly collection engine its declared working condition point with
And WHSC(steady-cycle in stable state) the operation of 13 operating points when the data informations such as delivery temperature, extraction flow, gas component, this
A little data are former number of rows evidence.Former number of rows according to can from it is compatible with preprocessor 18 to be tested, with a series of engine
Upper collection, engine can be the type used in batches, be also possible to the engine specimen produced by updated plan.
For in the development phase, engine that design scheme, model machine do not produce also has only been determined, can will be according to engine
The performance parameter that design feature is calculated is as former number of rows evidence.
Former number of rows of the invention, can also be from having determined that design scheme, also according to can both obtain from existing engine
It is obtained in the engine development scheme for not having model machine, verifying assessment can be carried out to existing engine, can also opened being in
The engine options in hair stage carry out verifying assessment, expand application range.For being in the engine options of development phase, root
According to the feedback of test result, the test basis and improvement direction of optimization can also be provided, shorten the period of engine development, subtract
The cost of small exploitation.
Step S2, the former number of rows evidence of 13 operating points based on the point of declared working condition collected by step S1 and WHSC, choosing
It selects the former number of rows evidence of several operating points, in the present embodiment, selects 13 operating conditions of declared working condition point and WHSC of engine
Several delivery temperatures in point are lower, extraction flow is lower, the biggish operating point of the amount of injection, and preprocessor 18 is in these operating conditions
Under point when operation, there are biggish crystallization risks, therefore select the former number of rows of these operating points according to being tested, can be relatively accurate
The crystallization situation of ground post-reaction treatment device 18.
The former number of rows evidence of several operating points selected in step S2 is input to burner of the invention by step S3
In test-bed, burner test-bed according to the former number of rows evidence of the step S2 each operating point inputted, adjust input wind speed,
Air quantity and fuel ratio simulate the exhaust emissions situation of engine, guarantee the row of each operating point output after burning
Temperature degree, extraction flow, gas component etc. and the former number of rows evidence of collected engine match.
The source that crystallization trial method of the invention uses burner test-bed to export as tail gas is based on burner
The test that platform carries out, for engine pedestal, structure, platform building, operation are simpler, and stage+module disassembly needs
The time to be spent is shorter, and cost of labor is lower.Warm-up times before burner test, the cooling time after test are shorter, drop
The low duration of entire test process.Using the exhaust emissions situation of burner test-bed simulated engine, for six rank of state
The engine of section can also be according to the performance parameter conduct that its design feature is calculated even if engine specimen can not obtain
Former number of rows is simulated according to input burner, obtains exporting with engine original number of rows according to the tail gas to match.
Step S4, according to the former number of rows of operating point selected in step S2 evidence, the emissions object of preprocessor 18, selection is closed
Suitable ammonia nitrogen ratio, ammonia nitrogen are demarcated the urea injecting quantity of DCU module 24, calibration process usage amount than being generally 1.0-1.2
Cup collects urea liquid, is weighed according to setting the amount of injection, guarantees deviation < 2%.
Step S5 carries out after-treatment system stable state crystallization trial, and main includes following several steps:
B1: cleaning operating condition is run to preprocessor 18 and is pre-processed, it is ensured that preprocessor 18 is clean, avoids on preprocessor 18
Residual impurity is to influence the accuracy of follow-up test result.After clearing up operating condition end of run, weigh to preprocessor 18,
Record data W0；
B2: operation burner test-bed, by the operating point original number of rows of input according to the exhaust for determining the output of burner test-bed
The data such as temperature, extraction flow, other components, the delivery temperature of device output to be combusted carry out in next step after stablizing；
B3: starting DCU module 24 carries out urea injection according to the urea injecting quantity of step S4 calibration；
B4, several selected operating points of step S2 are based on, under each operating point, first run 2h steady-cycle in stable state, circulation knot
Shu Hou is taken pictures and is weighed to preprocessor 18, and data W is recordedn-1；After taking pictures, weighing, operation cleaning operating condition, cleaning
After operating condition, 8h steady-cycle in stable state of reruning is taken pictures and is weighed to preprocessor 18 after circulation terminates, records data
Wn-2；
B5: data W will be recorded in B4n-1、Wn-2The data W recorded in B1 is individually subtracted0, increased weight D is calculatedn-1、
Dn-2。
, D step S6, determines test result, determines to require are as follows: 1)n-1> 5g, it is unqualified；2), Dn-1< 5g, Dn-2
> 30g, it is unqualified；3), Dn-1< 5g, Dn-2< 30g, qualified, off-test.
Pass through the judgement to test result, it can be estimated that the crystallization risk of preprocessor 18, if test result is qualified,
Illustrate preprocessor 18 there is no the risk of crystallization, 18 Product development plan of preprocessor is met the requirements；If test result is not
Qualification, then the risk for illustrating that the presence of preprocessor 18 crystallizes is larger, needs to do optimization design to aftertreatment products development plan, into
After one-step optimization improves, then verified by step S5.
Above description is explanation of the invention, is not limitation of the invention, without prejudice to spirit of that invention the case where
Under, the present invention can make any type of modification.For example, burner test-bed can also be not provided with mixing chamber 9, fuel tank 2
Several interior fuel cavities are directly connected on burner 13, and fuel is inputted in burner 13 and mixed by each fuel cavity.
Claims (10)
1. a kind of burner test-bed, including control cabinet (1), the fuel tank (2) being connect with control cabinet (1), burner (13),
It is characterized by: being equipped with several fuel cavities in fuel tank (2), each fuel cavity is connect with burner (13) respectively, burner
(13) air inlet (12), exhaust outlet (14) are provided on；When test, air inlet (12) is connect with supply air system, exhaust outlet (14)
It is connect with preprocessor (18).
2. burner test-bed described in accordance with the claim 1, it is characterised in that: between fuel tank (2) and burner (13)
It is provided with mixing chamber (9), each fuel cavity of fuel tank (2) is connect with mixing chamber (9) respectively, each fuel cavity and mixing chamber
(9) the first solenoid valve (7), first flowmeter (8) are provided between；Second is provided between mixing chamber (9) and burner (13)
Solenoid valve (10), second flowmeter (11)；Each first solenoid valve (7), second solenoid valve (10) connect with control cabinet (1) respectively
Connect, adjustable first solenoid valve (7) of control cabinet (1), second solenoid valve (10) aperture.
3. burner test-bed described in accordance with the claim 1, it is characterised in that: exhaust outlet is connected with Tail gas measuring on (14)
Instrument (15), third solenoid valve (17), tail-gas analyzer (15), third solenoid valve (17) are connect with control cabinet (1), control cabinet (1)
The opening and closing of third solenoid valve (17) is controlled according to the detection data of tail-gas analyzer (15).
4. burner test-bed described in accordance with the claim 1, it is characterised in that: the identical combustion of storage in several fuel cavities
Material or different fuel.
5. burner test-bed described in accordance with the claim 1, it is characterised in that: DOC module is arranged on preprocessor (18)
(19), DPF module (20), mixer module (21), SCR+ASC module (22)；Mixer module is provided with nozzle on (21)
(26), nozzle (26) is connected on urea tank (23) by urea pump (25), and DCU module (24) are provided on urea pump (25),
DCU module (24) is electrically connected with control cabinet (1).
6. a kind of crystallize examination using the mixer stable state based on burner that burner test-bed as described in claim 1 carries out
Proved recipe method, characterized by the following steps:
I, burner test-bed is according to former number of rows according to simulated engine operating condition；
II, urea injecting quantity calibration；
III, after-treatment system stable state crystallization trial；
IV, test result determine.
7. the mixer stable state crystallization trial method based on burner according to claim 6, it is characterised in that: simulating
Before operating condition, select the former number of rows of several operating points of engine according to input burner test-bed；Operating point is engine volume
Determine that several delivery temperatures in operating point and WHSC are lower, extraction flow is lower, the biggish operating point of the amount of injection；Several works
The former number of rows evidence of condition point is collected from existing engine, or is calculated according to the design feature of engine；Former number of rows evidence is row
Temperature degree, extraction flow, gas component data.
8. the mixer stable state crystallization trial method based on burner according to claim 6, it is characterised in that: Section III
Walk after-treatment system stable state crystallization trial the step of include:
A), after running cleaning operating condition to preprocessor (18), weigh to preprocessor (18), record data W0；
B), burner test-bed is run；
C), start DCU module (24)；
D), under each operating point, it is separately operable the steady-cycle in stable state of 2h, 8h, and is weighed respectively to preprocessor (18), number is recorded
According to Wn-1、Wn-2。
9. the mixer stable state crystallization trial method based on burner according to claim 6, it is characterised in that: Section III
To the judgement requirement of test result in step are as follows:
1), after 2h steady-cycle in stable state, increased weight is greater than 5g, and test result is unqualified；
2), after 2h steady-cycle in stable state, increased weight is less than 5g, and after 8h steady-cycle in stable state, increased weight is greater than 30g, test result
It is unqualified；
3), after 2h steady-cycle in stable state, increased weight is less than 5g, and after 8h steady-cycle in stable state, increased weight is less than 30g, test result
It is qualified.
10. the mixer stable state crystallization trial method based on burner according to claim 6, it is characterised in that: Section II
The ammonia nitrogen ratio selected in step is 1.0-1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910930671.0A CN110530642A (en) | 2019-09-29 | 2019-09-29 | A kind of burner test-bed and the mixer stable state crystallization trial method based on burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910930671.0A CN110530642A (en) | 2019-09-29 | 2019-09-29 | A kind of burner test-bed and the mixer stable state crystallization trial method based on burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110530642A true CN110530642A (en) | 2019-12-03 |
Family
ID=68670792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910930671.0A Pending CN110530642A (en) | 2019-09-29 | 2019-09-29 | A kind of burner test-bed and the mixer stable state crystallization trial method based on burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110530642A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735627A (en) * | 2020-06-05 | 2020-10-02 | 湖北德普电气股份有限公司 | Testing device for hydrogen fuel cell engine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545436A (en) * | 2016-01-19 | 2016-05-04 | 江苏大学 | Testing device for improving conversion efficiency of SCR system |
| CN105890905A (en) * | 2016-05-13 | 2016-08-24 | 常熟理工学院 | Internal combustion engine testing device suitable for wide-distillation range fuels and variable air components |
| CN106226085A (en) * | 2016-07-22 | 2016-12-14 | 杭州银轮科技有限公司 | Diesel SCR after-treatment system exhaustor urea crystals test method |
| CN106404402A (en) * | 2016-09-09 | 2017-02-15 | 浙江大学 | Diesel engine full-dimension SCR catalytic reactor performance test platform based on tail gas simulation |
| CN206638424U (en) * | 2017-02-26 | 2017-11-14 | 上海倍绿环保科技有限公司 | Diesel engine post-processing system testing stand for performance test device based on burner |
| CN107870092A (en) * | 2017-11-13 | 2018-04-03 | 上海为默机械科技有限公司 | A kind of testboard bay for simulated engine discharge |
| CN108571366A (en) * | 2018-04-13 | 2018-09-25 | 同济大学 | A kind of test system for reappearing diesel emission levels |
| KR101939184B1 (en) * | 2018-12-13 | 2019-01-16 | (주) 로 | Apparatus for control urea injection of CNG-diesel dual fuel engine system |
| CN210269174U (en) * | 2019-09-29 | 2020-04-07 | 无锡亿利环保科技有限公司 | Combustor test bench |
-
2019
- 2019-09-29 CN CN201910930671.0A patent/CN110530642A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545436A (en) * | 2016-01-19 | 2016-05-04 | 江苏大学 | Testing device for improving conversion efficiency of SCR system |
| CN105890905A (en) * | 2016-05-13 | 2016-08-24 | 常熟理工学院 | Internal combustion engine testing device suitable for wide-distillation range fuels and variable air components |
| CN106226085A (en) * | 2016-07-22 | 2016-12-14 | 杭州银轮科技有限公司 | Diesel SCR after-treatment system exhaustor urea crystals test method |
| CN106404402A (en) * | 2016-09-09 | 2017-02-15 | 浙江大学 | Diesel engine full-dimension SCR catalytic reactor performance test platform based on tail gas simulation |
| CN206638424U (en) * | 2017-02-26 | 2017-11-14 | 上海倍绿环保科技有限公司 | Diesel engine post-processing system testing stand for performance test device based on burner |
| CN107870092A (en) * | 2017-11-13 | 2018-04-03 | 上海为默机械科技有限公司 | A kind of testboard bay for simulated engine discharge |
| CN108571366A (en) * | 2018-04-13 | 2018-09-25 | 同济大学 | A kind of test system for reappearing diesel emission levels |
| KR101939184B1 (en) * | 2018-12-13 | 2019-01-16 | (주) 로 | Apparatus for control urea injection of CNG-diesel dual fuel engine system |
| CN210269174U (en) * | 2019-09-29 | 2020-04-07 | 无锡亿利环保科技有限公司 | Combustor test bench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735627A (en) * | 2020-06-05 | 2020-10-02 | 湖北德普电气股份有限公司 | Testing device for hydrogen fuel cell engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7748976B2 (en) | Use of recirculated exhaust gas in a burner-based exhaust generation system for reduced fuel consumption and for cooling | |
| CN106404402B (en) | The full-scale SCR catalyst Testing Platform of diesel engine based on tail gas simulation | |
| Kokjohn et al. | Fuel reactivity controlled compression ignition (RCCI) combustion in light-and heavy-duty engines | |
| CN107849998A (en) | Method and apparatus for optimizing design library part editor and reuse based on model | |
| CN104750066A (en) | Combustion process control and optimization system for combustion gas turbine | |
| CN106679982A (en) | Test bed device based on diesel engine after-treatment system performance test of combustor | |
| CN106596115B (en) | A kind of engine EGR fluid simulation testing stand | |
| Finesso et al. | Real-time predictive modeling of combustion and NO x formation in diesel engines under transient conditions | |
| Xin et al. | Multidimensional modeling of combustion for a six-mode emissions test cycle on a DI diesel engine | |
| CN210269174U (en) | Combustor test bench | |
| CN107806636A (en) | Diesel engine vent gas simulation generator | |
| US20060246386A1 (en) | Mass air flow compensation for burner-based exhaust gas generation system | |
| CN110530642A (en) | A kind of burner test-bed and the mixer stable state crystallization trial method based on burner | |
| CN107870092A (en) | A kind of testboard bay for simulated engine discharge | |
| Kumar et al. | Investigation of H2 formation characterization and its contribution to post-oxidation phenomenon in a turbocharged DISI engine | |
| CN106855463A (en) | Diesel engine post-processing system Accelarated aging test bench frame apparatus based on burner | |
| CN113864031B (en) | Vehicle tail gas simulation generating device | |
| CN206638424U (en) | Diesel engine post-processing system testing stand for performance test device based on burner | |
| Tromellini et al. | Analysis of scavenging air post-oxidation by means of 3D-CFD simulation including reaction mechanism | |
| CN206523481U (en) | Ship SCR reactors quick aging and testing stand for performance test device | |
| CN214304017U (en) | Device for simulating engine emission | |
| Jiang | Prediction of diesel engine particulate emission during transient cycles | |
| Chan et al. | Prediction of transient nitric oxide in diesel exhaust | |
| Shroff et al. | Simulation and optimization of thermodynamic processes of diesel engine | |
| Tan | Model based control for a modern automotive diesel engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |