CN110530642B - Combustor test bed and combustor-based mixer steady-state crystallization test method - Google Patents
Combustor test bed and combustor-based mixer steady-state crystallization test method Download PDFInfo
- Publication number
- CN110530642B CN110530642B CN201910930671.0A CN201910930671A CN110530642B CN 110530642 B CN110530642 B CN 110530642B CN 201910930671 A CN201910930671 A CN 201910930671A CN 110530642 B CN110530642 B CN 110530642B
- Authority
- CN
- China
- Prior art keywords
- burner
- test
- engine
- fuel
- steady
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 114
- 238000002425 crystallisation Methods 0.000 title claims description 42
- 230000008025 crystallization Effects 0.000 title claims description 42
- 238000010998 test method Methods 0.000 title claims description 19
- 239000000446 fuel Substances 0.000 claims abstract description 74
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 239000002828 fuel tank Substances 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 75
- 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
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 abstract description 17
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 238000011161 development Methods 0.000 description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000010790 dilution Methods 0.000 description 6
- 239000012895 dilution Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 229910002090 carbon oxide Inorganic materials 0.000 description 3
- -1 diesel Substances 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 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 3
- 238000012795 verification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000012356 Product development Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012942 design verification Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010200 validation analysis 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses a burner test bed which comprises a control cabinet, a fuel tank and a burner, wherein the fuel tank and the burner are connected with the control cabinet; during testing, the air inlet is connected with the air supply system, and the air outlet is connected with the post-processor. The burner test bed is provided with a plurality of fuel cavities, the fuel cavities are respectively connected to the mixing cavity through pipelines, the fuel in each fuel cavity is fully and uniformly mixed in the mixing cavity and then is input into the burner for combustion, tail gas generated after combustion is directly input into the postprocessor, the tail gas generated after combustion is input into the postprocessor, the gas components output by the burner are ensured to be identical to the gas components of the real engine tail gas, the tail gas output by the burner is ensured to accurately simulate the real condition of the engine tail gas, and the simulation accuracy is high.
Description
Technical Field
The invention relates to the technical field of design verification of an engine postprocessor, in particular to a combustor test bed and a combustor-based mixer steady-state crystallization test method.
Background
The post-processor in the engine exhaust system is mainly used for carrying out post-treatment on automobile exhaust, and converting harmful gases such as nitrogen oxides (NO X), hydrocarbon (CH), carbon Oxides (CO) and the like in the automobile exhaust into nitrogen (N 2), water (H 2 O), carbon dioxide (CO 2) and the like. At present, the exhaust emission is subjected to aftertreatment by adopting a DOC (oxidation catalyst) +DPF (particulate filter) +SCR (selective catalytic reduction) technology, a urea tank is arranged in an exhaust pipe, urea in the urea tank is used as a reducing agent and is sprayed into the exhaust pipe through a nozzle, nitrogen oxides (NO X) in the exhaust gas generate harmless nitrogen (N 2) and water (H 2 O) under the action of the catalyst, and finally the harmless nitrogen and the harmless water are discharged from the exhaust pipe, so that the purposes of energy conservation and emission reduction are achieved. In the sixth stage, due to strict regulations, the requirement on urea injection precision is higher, and the control of the crystallization of urea in a mixer is a key for improving the post-treatment conversion efficiency.
The invention patent CN106226085B discloses a urea crystallization test method for an exhaust pipe of a diesel engine SCR aftertreatment system, which comprises the following steps: p1: selecting a test engine; p2: performing engine hot running-in; p3: engine performance and raw emission validation; p4: confirming that the aftertreatment system works normally, and confirming emission of the SCR aftertreatment system; p5: the crystallization test method of the exhaust pipe of the SCR system comprises the following steps: the test time is 3 hours, and is divided into WHTC (transient circulation) cycles of 1 hour and steady-state test cycles of low-temperature low-exhaust flow limit working conditions of 2 hours, and the test is completed to check the urea crystallization condition inside the SCR catalyst and the exhaust pipe; p6: and judging whether the crystallization test of the SCR aftertreatment system is passed or not. This verification method has the following problems: (1) The urea crystallization test method is a verification method based on an engine bench, and the engine bench needs to obtain a target engine at first, namely, a proper engine prototype is selected from the model of the shaped engine, or after the prototype is produced according to a new engine development scheme, a corresponding bench test is carried out on the engine prototype. The construction of the engine bench takes a long time and has high labor cost. And the engine needs to be subjected to a longer engine hot running-in process before the test is carried out, and also needs to be subjected to a longer engine cooling process after the test is finished, so that the whole complete test process needs longer time. (2) The urea crystallization test method can only be used for testing on the existing engine bench, and for the engine scheme which only determines the design scheme and has no prototype, the test method can not be used for test evaluation, and the application range is limited.
The utility model patent CN206638424U discloses a diesel engine post-treatment system performance test bench device based on a burner, which is used for simulating diesel engine tail gas by controlling oil injection, ignition and combustion. The device's frequency conversion fan produced air mixes the dilution air that the section was burnt in the mixture and produces the exhaust entering dilution cavity, in dilution cavity and dilution fan produced. The device dilutes and mixes the exhaust after burning, and dilution air that dilution fan provided is the lower air of unburned concentration, contains unburned gaseous composition in the gas after diluting and mixing, has certain difference between the gaseous composition in the mixed gas and the gaseous composition in the actual diesel engine tail gas, can not simulate the actual condition of diesel engine tail gas very accurately, and simulation accuracy is relatively poor. The device is mainly aimed at a test bed of a diesel engine aftertreatment system, and has a small application range.
Disclosure of Invention
The inventor aims at the fact that the simulation accuracy of the traditional diesel engine aftertreatment system performance test bench device based on the burner is poor; the urea crystallization test method for the exhaust pipe of the SCR post-treatment system of the diesel engine is a verification method based on an engine pedestal, has the defects of time consumption, high labor cost and the like in the construction of the engine pedestal, and provides a reasonable burner test pedestal and a mixer steady-state crystallization test method based on a burner, wherein the burner simulation accuracy is high; based on the burner carries out simulation test, the burner obtains simply, builds simply, reduce cost.
The technical scheme adopted by the invention is as follows:
the burner test bed comprises a control cabinet, a fuel tank and a burner, wherein the fuel tank and the burner are connected with the control cabinet, a plurality of fuel cavities are arranged in the fuel tank, each fuel cavity is respectively connected with the burner, and an air inlet and an air outlet are formed in the burner; during testing, the air inlet is connected with the air supply system, and the air outlet is connected with the post-processor.
As a further improvement of the above technical scheme:
A mixing cavity is arranged between the fuel tank and the burner, each fuel cavity of the fuel tank is connected with the mixing cavity, and a first electromagnetic valve and a first flowmeter are arranged between each fuel cavity and the mixing cavity; a second electromagnetic valve and a second flowmeter are arranged between the mixing cavity and the burner; each first electromagnetic valve and each second electromagnetic valve are respectively connected with a control cabinet, and the opening of each first electromagnetic valve and the opening of each second electromagnetic valve can be adjusted by the control cabinet.
The burner test bed is provided with a plurality of fuel cavities, the fuel cavities are respectively connected to the mixing cavity through pipelines, the fuel in each fuel cavity is fully and uniformly mixed in the mixing cavity and then is input into the burner for combustion, tail gas generated after combustion is directly input into the postprocessor, the tail gas generated after combustion is input into the postprocessor, the gas components output by the burner are ensured to be identical to the gas components of the real engine tail gas, the tail gas output by the burner is ensured to accurately simulate the real condition of the engine tail gas, and the simulation accuracy is high.
The exhaust port is connected with a tail gas detector and a third electromagnetic valve, the tail gas detector and the third electromagnetic valve are connected with a control cabinet, and the control cabinet controls the opening and closing of the third electromagnetic valve according to detection data of the tail gas detector.
The tail gas detector and the third electromagnetic valve of the burner test bed are electrically connected with the control cabinet, the control cabinet controls the opening and closing of the third electromagnetic valve according to the detection data of the tail gas detector, and the third electromagnetic valve is in a closed state when the detection data is different from the original row data input on the control cabinet; and when the third electromagnetic valve is opened, the bypass pipe is closed, and tail gas is input into the postprocessor through the third electromagnetic valve, so that the gas input into the postprocessor is ensured to be matched with the real tail gas of the engine, and the accuracy of tail gas simulation is ensured.
The same fuel or different fuels are stored in a plurality of fuel chambers.
The burner test bed can store the same fuel in each fuel cavity, can store different fuels such as diesel, methanol, ethanol, biological fuel and the like, and can perform original-row simulation on a diesel engine, a gasoline engine, a natural gas engine or other new energy engines by outputting different fuels, so that the application range is wide.
The aftertreatment device is provided with a DOC module, a DPF module, a mixer module and an SCR+ASC module; be provided with the nozzle on the blender module, the nozzle passes through the urea pump to be connected to on the urea jar, is provided with the DCU module on the urea pump, and the DCU module is connected with the switch board electricity.
A method for performing a combustor-based mixer steady-state crystallization test by using the combustor test stand comprises the following steps:
I. the burner test bed simulates the working condition of the engine according to the original row data;
II. Calibrating urea injection quantity;
III, a steady-state crystallization test of a post-treatment system;
IV, judging the test result.
The crystallization test method adopts the burner test bed as a source of tail gas output, is based on the test performed by the burner platform, and has simpler structure, platform construction and operation, shorter time for installing and detaching the platform and lower labor cost compared with the engine bed. The heat engine time before the burner test and the cooling time after the test are shorter, so that the duration of the whole test process is reduced. The tail gas emission condition of the engine is simulated by adopting the burner test bed, and for the six-stage engine, even if the engine model cannot be obtained, the performance parameters obtained by calculation according to the design characteristics of the engine model can be used as raw exhaust data to be input into the burner for simulation, so that the tail gas output matched with the raw exhaust data of the engine is obtained.
As a further improvement of the above technical scheme:
Before simulating working conditions, selecting original row data of a plurality of working condition points of an engine to be input into a burner test bed; the working condition points are the rated working condition points of the engine, and a plurality of working condition points with lower exhaust temperature, lower exhaust flow and larger injection quantity in the WHSC; the original row data of a plurality of working condition points are collected from the existing engine or are calculated according to the design characteristics of the engine; the original exhaust data are exhaust temperature, exhaust flow and gas composition data.
According to the invention, the working point is selected from the rated working point of the engine and a plurality of working points of thirteen working points of WHSC, wherein the working points are lower in exhaust temperature, lower in exhaust flow and larger in injection quantity, and when the post-processor operates under the working points, a larger crystallization risk exists, so that the original row data of the working points are selected for testing, and the crystallization condition of the post-processor can be reflected more accurately. The original row data can be obtained from the existing engine, can be obtained from the determined design scheme and the engine development scheme without a prototype, can be used for verifying and evaluating the existing engine, can be used for verifying and evaluating the engine scheme in the development stage, and expands the application range. For the engine scheme in the development stage, according to feedback of test results, an optimized test basis and an improved direction can be provided, the development period of the engine is shortened, and the development cost is reduced.
The step III of the steady-state crystallization test of the post-treatment system comprises the following steps:
a) Weighing the post-processor after the post-processor operates and cleans the working condition, and recording data W 0;
b) Operating a burner test bed;
c) Starting a DCU module;
d) And under each working condition point, respectively running steady-state circulation for 2h and 8h, respectively weighing the post-processor, and recording data W n-1、Wn-2.
In the step III, the judging requirements on the test result are as follows:
1) After 2 hours of steady-state circulation, the added weight is more than 5g, and the test result is unqualified;
2) After 2h steady-state circulation, the added weight is less than 5g, after 8h steady-state circulation, the added weight is more than 30g, and the test result is unqualified;
3) After 2h steady-state circulation, the added weight is less than 5g, after 8h steady-state circulation, the added weight is less than 30g, and the test result is qualified.
The ammonia nitrogen ratio selected in the step II is 1.0-1.2.
The beneficial effects of the invention are as follows:
The burner test bed is provided with a plurality of fuel cavities, the fuel cavities are respectively connected to the mixing cavity through pipelines, the fuel in each fuel cavity is fully and uniformly mixed in the mixing cavity and then is input into the burner for combustion, tail gas generated after combustion is directly input into the postprocessor, the tail gas generated after combustion is input into the postprocessor, the gas components output by the burner are ensured to be identical to the gas components of the real engine tail gas, the tail gas output by the burner is ensured to accurately simulate the real condition of the engine tail gas, and the simulation accuracy is high.
The tail gas detector and the third electromagnetic valve of the burner test bed are electrically connected with the control cabinet, the control cabinet controls the opening and closing of the third electromagnetic valve according to the detection data of the tail gas detector, and the third electromagnetic valve is in a closed state when the detection data is different from the original row data input on the control cabinet; and when the third electromagnetic valve is opened, the bypass pipe is closed, and tail gas is input into the postprocessor through the third electromagnetic valve, so that the gas input into the postprocessor is ensured to be matched with the real tail gas of the engine, and the accuracy of tail gas simulation is ensured.
The burner test bed can store the same fuel in each fuel cavity, can store different fuels such as diesel, methanol, ethanol, biological fuel and the like, and can perform original-row simulation on a diesel engine, a gasoline engine, a natural gas engine or other new energy engines by outputting different fuels, so that the application range is wide.
The crystallization test method adopts the burner test bed as a source of tail gas output, is based on the test performed by the burner platform, and has simpler structure, platform construction and operation, shorter time for installing and detaching the platform and lower labor cost compared with the engine bed. The heat engine time before the burner test and the cooling time after the test are shorter, so that the duration of the whole test process is reduced. The tail gas emission condition of the engine is simulated by adopting the burner test bed, and for the six-stage engine, even if the engine model cannot be obtained, the performance parameters obtained by calculation according to the design characteristics of the engine model can be used as raw exhaust data to be input into the burner for simulation, so that the tail gas output matched with the raw exhaust data of the engine is obtained.
According to the invention, the working point is selected from the rated working point of the engine and a plurality of working points of thirteen working points of WHSC, wherein the working points are lower in exhaust temperature, lower in exhaust flow and larger in injection quantity, and when the post-processor operates under the working points, a larger crystallization risk exists, so that the original row data of the working points are selected for testing, and the crystallization condition of the post-processor can be reflected more accurately. The original row data can be obtained from the existing engine, can be obtained from the determined design scheme and the engine development scheme without a prototype, can be used for verifying and evaluating the existing engine, can be used for verifying and evaluating the engine scheme in the development stage, and expands the application range. For the engine scheme in the development stage, according to feedback of test results, an optimized test basis and an improved direction can be provided, the development period of the engine is shortened, and the development cost is reduced.
Drawings
FIG. 1 is a schematic view of a burner test stand of the present invention.
FIG. 2 is a test flow chart of the test method of the present invention.
In the figure: 1. a control cabinet; 2. a fuel tank; 3. a first fuel chamber; 4. a second fuel chamber; 5. a third fuel chamber; 6. a fourth fuel chamber; 7. a first electromagnetic valve; 8. a first flowmeter; 9. a mixing chamber; 10. a second electromagnetic valve; 11. a second flowmeter; 12. an air inlet; 13. a burner; 14. an exhaust port; 15. a tail gas detector; 16. a bypass pipe; 17. a third electromagnetic valve; 18. a post-processor; 19. a DOC module; 20. a DPF module; 21. a mixer module; 22. an scr+asc (ammonia slip catalyst) module; 23. a urea tank; 24. a DCU (urea injection control unit) module; 25. a urea pump; 26. a nozzle; 27. a nozzle holder; 28. urea solution.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a fuel tank 2 of the burner test stand is electrically connected to a control cabinet 1, a plurality of fuel cavities are arranged in parallel in the fuel tank 2, a first fuel cavity 3, a second fuel cavity 4, a third fuel cavity 5 and a fourth fuel cavity 6 are arranged in the embodiment, the same fuel can be stored in each fuel cavity, different fuels such as diesel, methanol, ethanol and biological fuel can be stored in each fuel cavity, and the fuel tank can perform original-row simulation on a diesel engine, a gasoline engine, a natural gas engine or other new energy engines by outputting different fuels, so that the application range is wide; the four fuel chambers are respectively connected to the mixing chamber 9 through pipelines, a first electromagnetic valve 7 and a first flowmeter 8 are sequentially arranged between each fuel chamber and the mixing chamber 9, each first electromagnetic valve 7 is electrically connected with the control cabinet 1 (not shown in the figure), the control cabinet 1 can adjust the opening of the first electromagnetic valve 7 so as to control the fuel flow of each fuel chamber, and the first flowmeter 8 is used for monitoring the fuel flow output by each fuel chamber; each fuel cavity can adjust different fuel proportions according to specific original row requirements, and the output fuel is fully and uniformly mixed in the mixing cavity 9. The mixing cavity 9 is connected to the burner 13 through a pipeline, a second electromagnetic valve 10 and a second flowmeter 11 are arranged between the mixing cavity 9 and the burner 13, the second electromagnetic valve 10 is electrically connected with the control cabinet 1 (not shown in the figure), the control cabinet 1 can adjust the opening of the first electromagnetic valve 7 so as to control the output fuel flow of the mixing cavity 9, and the second flowmeter 11 is used for monitoring the fuel flow output by the mixing cavity 9; the burner 13 is electrically connected with the control cabinet 1, and the control cabinet 1 can control the ignition of the burner 13; The burner 13 is provided with an air inlet 12 and an air outlet 14, the air inlet 12 is connected with an air supply system (not shown in the figure), the air supply system supplies air with certain air speed and air quantity to the burner 13 through the air inlet 12, the air inlet 12 is electrically connected with the control cabinet 1 (not shown in the figure), and the control cabinet 1 can control the opening degree of the air inlet 12, so that the air quantity supplied by the air supply system is controlled; the exhaust port 14 is connected with the post-processor 18, a third electromagnetic valve 17 is arranged between the exhaust port 14 and the post-processor 18, and tail gas generated by the burner 13 is input into the post-processor 18 through the exhaust port 14 for crystallization test; an exhaust gas detector 15 is provided on the exhaust port 14 through a bypass pipe 16 for detecting data such as an exhaust temperature, an exhaust flow rate, and a gas component of the output exhaust gas. The tail gas detector 15 and the third electromagnetic valve 17 are electrically connected with the control cabinet 1 (not shown in the figure), the control cabinet 1 controls the opening and closing of the third electromagnetic valve 17 according to the detection data of the tail gas detector 15, and when the detection data is different from the original row data input on the control cabinet 1, the third electromagnetic valve 17 is in a closed state; at the same time, the third electromagnetic valve 17 is opened, the bypass pipe 16 is closed, the tail gas is input into the postprocessor 18 through the third electromagnetic valve 17, the gas input into the postprocessor 18 is ensured to be matched with the real tail gas of the engine, and the accuracy of tail gas simulation is ensured. The post processor 18 is provided with a DOC module 19, a DPF module 20, a mixer module 21 and an SCR+ASC module 22 in sequence from front to back; The mixer module 21 is provided with a nozzle 26 by extending into a nozzle seat 27, the nozzle 26 is connected to the urea tank 23 by a urea pump 25, the urea pump 25 is provided with a DCU module 24, the DCU module 24 is electrically connected with the control cabinet 1 (not shown in the figure), and the DCU module 24 calibrates the urea injection quantity according to the original row data input on the control cabinet 1.
When the burner test bed is adopted to perform a mixer steady-state crystallization test, original row data are input into the control cabinet 1, the control cabinet 1 opens and adjusts the opening degree of each first electromagnetic valve 7 and each second electromagnetic valve 10 according to the original row data, opens and adjusts the air inlet 12 of the burner 13, each fuel cavity inputs fuel into the mixing cavity 9 according to the respective fuel ratio, the fuel is mixed in the mixing cavity 9 and then is input into the burner 13, and the air supply system sends air into the burner 13 through the air inlet 12; the control cabinet 1 controls the ignition of the burner 13, and the input fuel and air are combusted in the burner 13 to generate tail gas; the exhaust gas detector 15 detects the data such as exhaust temperature, exhaust flow, gas components and the like at the exhaust port 14, and feeds back the detection data to the control cabinet 1, the control cabinet 1 compares the received detection data with the input original exhaust data, when the detection data are identical, the bypass pipe 16 is closed, the third electromagnetic valve 17 is opened, the exhaust gas is input into the postprocessor 18, sequentially passes through each module of the postprocessor 18, the urea tank 23 sprays urea liquid 28 into the mixer module 21 through the urea pump 25 and the nozzle 26, and the urea liquid 28 and the exhaust gas are uniformly mixed in the mixer module 21 and then enter the SCR+ASC module to react in the SCR+ASC module. According to the burner test bed disclosed by the invention, the fuel ratio of each fuel cavity is regulated according to the primary exhaust data, the fuel of each fuel cavity is fully and uniformly mixed in the mixing cavity 9 and then is input into the burner 13 for combustion, the tail gas generated after combustion is directly input into the postprocessor 18, the tail gas generated after combustion is input into the postprocessor 18, the gas components output by the burner 13 are ensured to be the same as the gas components of the real engine tail gas, the tail gas output by the burner 13 is ensured to accurately simulate the real condition of the engine tail gas, and the simulation accuracy is high.
As shown in fig. 2, the burner-based mixer steady-state crystallization test can be performed on the post-processor 18 by using the burner test stand of the present invention, wherein the test method is to verify whether the post-processor 18 has a crystallization risk in the early stage of development of the post-processor 18, and specifically comprises the following steps:
step S1: collecting engine data;
step S2: selecting a working condition point;
Step S3: the burner simulates the working condition of the engine;
Step S4: calibrating urea injection quantity;
step S5: performing steady-state crystallization test on the post-treatment system;
Step S6: and judging the test result.
After the test is performed according to the steps, the obtained test result is compared with a set value: (1) If the test result is smaller than the set value, the test is successful, i.e. the post-processor 18 meets the requirements, and the risk of crystallization does not exist; (2) If the test result is greater than the set value, the test fails, and the post-processor 18 has a risk of crystallization, so that the post-processor 18 needs to be optimally designed, and the optimized product is re-verified according to the steps S5 and S6.
In step S1, first, relevant data of the engine need to be collected, mainly data information such as exhaust temperature, exhaust flow, gas composition and the like when the engine runs at its rated operating point and thirteen operating points of WHSC (steady state cycle), and these data are raw emission data. The raw data may be collected from the same series of engines that are adapted to the post-processor 18 to be tested, either in the form of models that have been used in bulk or in the form of model engines that were produced according to the latest protocol. For an engine in a development stage, only a design scheme is determined, and a model machine is not produced yet, the performance parameters calculated according to the design characteristics of the engine can be used as original row data.
The original row data of the invention can be obtained from the existing engine, can be obtained from the determined design scheme and the engine development scheme without a prototype, can be used for verifying and evaluating the existing engine, can be used for verifying and evaluating the engine scheme in the development stage, and expands the application range. For the engine scheme in the development stage, according to feedback of test results, an optimized test basis and an improved direction can be provided, the development period of the engine is shortened, and the development cost is reduced.
Step S2, based on the rated operating point collected in step S1 and the raw data of thirteen operating points of the WHSC, the raw data of a plurality of operating points are selected, in this embodiment, the rated operating point of the engine and the operating points of the thirteen operating points of the WHSC, which have lower exhaust temperature, lower exhaust flow and larger injection quantity, are selected, and when the post-processor 18 operates at these operating points, there is a larger crystallization risk, so that the raw data of these operating points are selected for testing, and the crystallization condition of the post-processor 18 can be reflected more accurately.
And S3, inputting the raw exhaust data of the plurality of working condition points selected in the step S2 into the burner test bed, and adjusting the input wind speed, the wind quantity and the fuel ratio of the burner test bed according to the raw exhaust data of the working condition points input in the step S2, so as to simulate the exhaust emission condition of the engine, and ensure that the exhaust temperature, the exhaust flow, the gas components and the like output by each working condition point after combustion are matched with the collected raw exhaust data of the engine.
The crystallization test method adopts the burner test bed as a source of tail gas output, is based on the test performed by the burner platform, and has simpler structure, platform construction and operation, shorter time for installing and detaching the platform and lower labor cost compared with the engine bed. The heat engine time before the burner test and the cooling time after the test are shorter, so that the duration of the whole test process is reduced. The tail gas emission condition of the engine is simulated by adopting the burner test bed, and for the six-stage engine, even if the engine model cannot be obtained, the performance parameters obtained by calculation according to the design characteristics of the engine model can be used as raw exhaust data to be input into the burner for simulation, so that the tail gas output matched with the raw exhaust data of the engine is obtained.
And S4, selecting a proper ammonia nitrogen ratio according to the original exhaust data of the selected working condition point in the step S2 and the emission target of the post-processor 18, calibrating the urea injection quantity of the DCU module 24, collecting urea solution in a calibration process by using a measuring cup, weighing according to the set injection quantity, and ensuring the deviation to be less than 2%.
Step S5, performing a steady-state crystallization test of the post-treatment system, wherein the method mainly comprises the following steps:
b1: the operation cleaning working condition of the post-processor 18 is preprocessed, so that the post-processor 18 is ensured to be clean, and the residual impurities on the post-processor 18 are avoided to influence the accuracy of the subsequent test results. After the operation of the cleaning working conditions is finished, weighing the post processor 18, and recording data W 0;
B2: operating a burner test bed, determining the data of the temperature, the exhaust flow, other components and the like of the exhaust output by the burner test bed according to the original exhaust data of the input working point, and carrying out the next step after the temperature of the exhaust output by the burner is stable;
B3: starting a DCU module 24, and performing urea injection according to the urea injection quantity calibrated in the step S4;
step 4, based on a plurality of working condition points selected in the step 2, under each working condition point, running for 2 hours, performing steady-state circulation, photographing and weighing the postprocessor 18 after the circulation is finished, and recording data W n-1; after photographing and weighing are finished, operating the cleaning working condition, after the cleaning working condition is finished, operating the steady-state circulation for 8 hours, photographing and weighing the post-processor 18 after the circulation is finished, and recording data W n-2;
B5: the data W 0 recorded in B1 was subtracted from the data W n-1、Wn-2 recorded in B4, respectively, to calculate an increased weight D n-1、Dn-2.
Step S6, judging the test result, wherein the judging requirement is as follows: 1) D n-1 is more than 5g, and is unqualified; 2) D n-1＜5g、Dn-2 is more than 30g, and is unqualified; 3) D n-1＜5g、Dn-2 is less than 30g, the test is finished.
Through judging the test result, the crystallization risk of the post-processor 18 can be evaluated, and if the test result is qualified, the post-processor 18 is indicated that the crystallization risk does not exist, and the product development scheme of the post-processor 18 meets the requirements; if the test result is not qualified, it indicates that the risk of crystallization exists in the post-processor 18, and the post-processing product development scheme needs to be optimally designed, and then is verified according to step S5 after further optimization and improvement.
The above description is illustrative of the invention and is not intended to be limiting, and the invention may be modified in any form without departing from the spirit of the invention. For example, the burner test stand may be provided without the mixing chamber 9, and several fuel chambers in the fuel tank 2 may be directly connected to the burner 13, each of which inputs fuel into the burner 13 to be mixed.
Claims (9)
1. The utility model provides a combustor test bench, includes switch board (1), fuel tank (2) that are connected with switch board (1), combustor (13), its characterized in that: a plurality of fuel cavities are arranged in the fuel tank (2), each fuel cavity is respectively connected with a burner (13), and an air inlet (12) and an air outlet (14) are arranged on the burner (13); during testing, the air inlet (12) is connected with the air supply system, and the air outlet (14) is connected with the post-processor (18); the exhaust port (14) is connected with an exhaust gas detector (15) and a third electromagnetic valve (17), the exhaust gas detector (15) and the third electromagnetic valve (17) are connected with a control cabinet (1), and the control cabinet (1) controls the opening and closing of the third electromagnetic valve (17) according to detection data of the exhaust gas detector (15); the burner test bed simulates the working condition of the engine according to the original exhaust data, and before the working condition is simulated, the original exhaust data of a plurality of working condition points of the engine are selected to be input into the burner test bed; the original row data of a plurality of working condition points are collected from the existing engine or are calculated according to the design characteristics of the engine; the original exhaust data are exhaust temperature, exhaust flow and gas composition data.
2. The burner test stand of claim 1, wherein: a mixing cavity (9) is arranged between the fuel tank (2) and the burner (13), each fuel cavity of the fuel tank (2) is respectively connected with the mixing cavity (9), and a first electromagnetic valve (7) and a first flowmeter (8) are arranged between each fuel cavity and the mixing cavity (9); a second electromagnetic valve (10) and a second flowmeter (11) are arranged between the mixing cavity (9) and the burner (13); each first electromagnetic valve (7) and each second electromagnetic valve (10) are respectively connected with the control cabinet (1), and the opening of each first electromagnetic valve (7) and each second electromagnetic valve (10) can be adjusted by the control cabinet (1).
3. The burner test stand of claim 1, wherein: the same fuel or different fuels are stored in a plurality of fuel chambers.
4. The burner test stand of claim 1, wherein: a DOC module (19), a DPF module (20), a mixer module (21) and an SCR+ASC module (22) are arranged on the post-processor (18); be provided with nozzle (26) on blender module (21), nozzle (26) are connected to urea jar (23) through urea pump (25), are provided with DCU module (24) on urea pump (25), and DCU module (24) are connected with switch board (1) electricity.
5. A method of burner-based mixer steady state crystallization testing using the burner test stand of claim 1, wherein: the method comprises the following steps:
I. the burner test bed simulates the working condition of the engine according to the original row data;
II. Calibrating urea injection quantity;
III, a steady-state crystallization test of a post-treatment system;
IV, judging the test result.
6. The burner-based mixer steady state crystallization test method according to claim 5, wherein: the operating point is the rated operating point of the engine, and a plurality of operating points with lower exhaust temperature, lower exhaust flow and larger injection quantity in the WHSC.
7. The burner-based mixer steady state crystallization test method according to claim 5, wherein: the step III of the steady-state crystallization test of the post-treatment system comprises the following steps:
a) After the working condition of the post processor (18) is cleaned, weighing the post processor (18), and recording data W 0;
b) Operating a burner test bed;
c) Starting the DCU module (24);
d) And under each working condition point, respectively running steady-state circulation for 2h and 8h, respectively weighing the post-processor (18), and recording data W n-1、Wn-2.
8. The burner-based mixer steady state crystallization test method according to claim 5, wherein: in the step III, the judging requirements on the test result are as follows:
1) After 2 hours of steady-state circulation, the added weight is more than 5g, and the test result is unqualified;
2) After 2h steady-state circulation, the added weight is less than 5g, after 8h steady-state circulation, the added weight is more than 30g, and the test result is unqualified;
3) After 2h steady-state circulation, the added weight is less than 5g, after 8h steady-state circulation, the added weight is less than 30g, and the test result is qualified.
9. The burner-based mixer steady state crystallization test method according to claim 5, wherein: the ammonia nitrogen ratio selected in the step II is 1.0-1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910930671.0A CN110530642B (en) | 2019-09-29 | 2019-09-29 | Combustor test bed and combustor-based mixer steady-state crystallization test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910930671.0A CN110530642B (en) | 2019-09-29 | 2019-09-29 | Combustor test bed and combustor-based mixer steady-state crystallization test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110530642A CN110530642A (en) | 2019-12-03 |
| CN110530642B true CN110530642B (en) | 2024-07-19 |
Family
ID=68670792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910930671.0A Active CN110530642B (en) | 2019-09-29 | 2019-09-29 | Combustor test bed and combustor-based mixer steady-state crystallization test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110530642B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442930A (en) * | 2020-05-08 | 2020-07-24 | 广西玉柴机器股份有限公司 | Automatic WHSC (WHSC) cycle test system |
| CN111735627B (en) * | 2020-06-05 | 2022-03-01 | 湖北德普电气股份有限公司 | Testing device for hydrogen fuel cell engine |
| CN111735635A (en) * | 2020-07-29 | 2020-10-02 | 无锡亿利环保科技有限公司 | Cold flow backpressure test bench and cold flow backpressure test method of post-processor |
| CN113984396A (en) * | 2021-09-18 | 2022-01-28 | 国网浙江省电力有限公司电力科学研究院 | Peak-shaving gas turbine unit combustion simulation test device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN210269174U (en) * | 2019-09-29 | 2020-04-07 | 无锡亿利环保科技有限公司 | Combustor test bench |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
-
2019
- 2019-09-29 CN CN201910930671.0A patent/CN110530642B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN210269174U (en) * | 2019-09-29 | 2020-04-07 | 无锡亿利环保科技有限公司 | Combustor test bench |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110530642A (en) | 2019-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110530642B (en) | Combustor test bed and combustor-based mixer steady-state crystallization test method | |
| CN107849998B (en) | Method and device for model-based optimization of engineering devices | |
| Pirker et al. | Sustainable power generation with large gas engines | |
| CN109681299B (en) | Engine control method of Urea-SCR system of diesel engine | |
| Finesso et al. | Real-time predictive modeling of combustion and NO x formation in diesel engines under transient conditions | |
| CN106404402A (en) | Diesel engine full-dimension SCR catalytic reactor performance test platform based on tail gas simulation | |
| Provataris et al. | Prediction of NOx emissions for high speed DI Diesel engines using a semi-empirical, two-zone model | |
| CN107219323B (en) | method for evaluating durability of motorcycle catalyst | |
| CN210269174U (en) | Combustor test bench | |
| CN114970404B (en) | Engine oil consumption calculation and optimization method based on in-cylinder combustion CFD analysis | |
| KR101281121B1 (en) | Test apparatus for exhaust gas system of vehicle based on hils | |
| Schilling | Model-based detection and isolation of faults in the air and fuel paths of common-rail DI diesel engines equipped with a lambda and a nitrogen oxides sensor | |
| CN106855463A (en) | Diesel engine post-processing system Accelarated aging test bench frame apparatus based on burner | |
| CN206638424U (en) | Diesel engine post-processing system testing stand for performance test device based on burner | |
| CN214304017U (en) | Device for simulating engine emission | |
| CN116562190A (en) | Natural gas engine combustion optimization method by cooperative vortex | |
| CN112763223A (en) | Post-processor crystallization monitoring rack, post-processor crystallization monitoring test method and post-processor simulation design optimization method | |
| Zheng et al. | Emission Characteristics of Heavy-Duty Vehicle Diesel Engines at High Altitudes | |
| Sharma et al. | Predictive semi-empirical NOx model for diesel engine | |
| Barillari et al. | Post-Oxidation Phenomena as a Thermal Management Strategy for Automotive After-Treatment Systems: Assessment by Means of 3D-CFD Virtual Development | |
| CN206523305U (en) | Diesel engine post-processing system Accelarated aging test bench frame apparatus based on burner | |
| Hatz et al. | Investigation and Comparison of the Prediction Capabilities of Multiple 0D/1D Combustion Calibration Strategies Using Different Turbocharger Systems as Calibration Basis | |
| CN106645551A (en) | Test bed unit for rapid aging and performance testing of SCR reactor used for ship | |
| CN214096599U (en) | Post-processor crystallization monitoring rack | |
| CN113834662B (en) | Method for verifying influence of variable oil injection angle of engine on PN number |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |