CN113588276A - Method for adapting reducing agent injection quantity of SCR system to engine bench test - Google Patents
Method for adapting reducing agent injection quantity of SCR system to engine bench test Download PDFInfo
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- CN113588276A CN113588276A CN202110908382.8A CN202110908382A CN113588276A CN 113588276 A CN113588276 A CN 113588276A CN 202110908382 A CN202110908382 A CN 202110908382A CN 113588276 A CN113588276 A CN 113588276A
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- reducing agent
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- 238000002347 injection Methods 0.000 title claims abstract description 80
- 239000007924 injection Substances 0.000 title claims abstract description 80
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 78
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 14
- 230000003044 adaptive effect Effects 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract description 3
- 230000000875 corresponding effect Effects 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
The invention discloses a method for adapting the injection quantity of a reducing agent of an SCR system to an engine bench test, which comprises a control unit and an injection regulating system, wherein the injection system comprises a proportional solenoid valve, a spray gun component, a corresponding pressure sensor and a corresponding control solenoid valve, and the adaptation regulating method of the injection quantity of the reducing agent comprises the following steps: the method for adapting the reducing agent injection quantity of the SCR system to the engine bench test meets the requirement of wide adjustment range of the reducing agent injection quantity of the SCR system in the tail gas treatment of the engine bench, so that the SCR system is always in the optimal running state, the tail gas treatment effect is good, and the use convenience is greatly improved.
Description
Technical Field
The invention relates to the technical field of engine tail gas treatment, in particular to a method for adapting the injection quantity of a reducing agent of an SCR system to an engine bench test.
Background
Along with the gradual implementation of the emission regulations of engines at home and abroad, the emission limit value of exhaust pollutants is controlled more and more strictly by each department, engine manufacturers produce a large amount of tail gas during engine tests, the tail gas emission is monitored and controlled by local environmental departments, and the engine tests are limited if the tail gas emission cannot meet the environmental requirements. The main pollutant in the exhaust gas of an engine is NOXSelective Catalytic Reduction system (SCR, acronym of Selective Catalytic Reduction) as NO ReductionXHas become a recognized effective way to reduce NOXThe route of discharge.
Because the power of the tested engines of the same test bed at different moments is possibly different greatly, tail gas discharged in the whole working condition range needs to be purified when each engine is tested, a reducing agent injection regulating system with wide-range regulating capacity is needed, and due to the limitation of the working range of any regulating system, the application requirement of the wide injection range cannot be met, so that the testing capacity of the engine bed is limited to a great extent.
Disclosure of Invention
The invention aims to overcome the existing defects, provides a method for adapting the injection quantity of a reducing agent of an SCR system to an engine bench test, meets the requirement of wide regulation range of the injection quantity of the reducing agent of the SCR system for treating tail gas of the engine bench test, ensures that the SCR system is always in the optimal running state, has good tail gas treatment effect and high utilization rate of the bench test, and can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for adapting the injection quantity of a reducing agent of an SCR system to an engine bench test comprises a control unit and an injection regulating system, wherein the injection system comprises a proportional solenoid valve, a spray gun assembly, a corresponding pressure sensor and a corresponding control solenoid valve, and the adaptation and regulation method of the injection quantity of the reducing agent comprises the following steps: firstly, uniformly planning a test bed, dividing the power of the test bed according to the actual condition, and then designing a plurality of groups of injection regulating systems by combining the capacity of each test bed, the regulating capacity of a proportional solenoid valve and the injection capacity of a spray gun assembly, so that the proportional solenoid valve and the spray gun assembly in each injection regulating system are optimally matched.
As a preferable technical scheme of the invention, the injection regulating systems are respectively divided into three groups, namely an Aa system, a Bb system and a Dd system, the power coverage range of the test bed is A-F, wherein the A-C power corresponds to the Aa system regulation, the B-E power corresponds to the Bb system regulation, and the D-F power corresponds to the Dd system regulation.
As a preferred technical scheme of the invention, the control unit comprises a state display interface, a parameter setting interface and an operation interface, and after the engine power is input into a corresponding window of the parameter setting interface, the system automatically selects a corresponding injection regulation system.
As a preferred technical scheme of the invention, the state display interface synchronously displays the currently activated system and the working state thereof, the parameter setting interface is provided with a power coverage range adjusting window and an injection amount range adjusting window, a worker carries out proper adjustment according to the actual condition, the parameter adjustment can only be carried out within a preset range of a program, the adjustment beyond the range value is invalid and a touch screen gives corresponding prompt, and the control interface controls a single control electromagnetic valve to act, so that the system debugging and the state testing are facilitated.
As a preferable technical solution of the present invention, the action pipeline of the injection regulation system includes an engine exhaust gas discharge pipeline, and the engine exhaust gas discharge pipeline is connected to the injection pipe.
As a preferable technical solution of the present invention, the action pipe of the injection regulation system includes a reducing agent supply pipe, and the reducing agent solution enters the nozzle assembly along the reducing agent supply pipe sequentially through a reducing agent supply solenoid valve, a proportional solenoid valve, and a reducing agent liquid pressure sensor.
As a preferable technical solution of the present invention, the action pipeline of the injection regulation system includes a cleaning liquid supply pipeline, the cleaning liquid passes through the cleaning liquid electromagnetic valve and sequentially passes through the proportional electromagnetic valve, the reducing agent liquid pressure electromagnetic valve and the nozzle assembly along the reducing agent supply pipeline, and the reducing agent supply pipeline, the proportional electromagnetic valve, the reducing agent liquid pressure sensor and the nozzle assembly are cleaned, the reducing agent supply electromagnetic valve and the cleaning electromagnetic valve operate in a time-sharing manner, and only one electromagnetic valve is opened at the same time.
As a preferable technical scheme of the invention, the action pipeline of the injection regulation system comprises a compressed air pipeline, and the compressed air pipeline sequentially passes through a reducing agent supply pressure sensor, a reducing agent supply electromagnetic control valve and a spray gun assembly.
Compared with the prior art, the invention has the beneficial effects that: the method for adapting the injection quantity of the reducing agent of the SCR system to the engine bench test has strong practicability and simple operation, effectively enlarges the experimental capability of the engine bench, improves the utilization rate of the bench, saves the cost, adapts to the market requirement, and can realize the reduction of the injection quantity of the reducing agent of the SCR system according to the power division of the test bench, the proportion electromagnetic valve and the spray gun component in each injection system are optimally matched by adjusting the proportion electromagnetic valve and the spray gun component corresponding to different injection systems, not only can expand the test capability of the test bed, but also can ensure that the SCR system is in the best working state, the control unit is arranged to collect signals of the pressure sensor and system operation parameters, the corresponding action of the electromagnetic valve is controlled by integrating the operation state of the engine, the opening degree of the proportional electromagnetic valve is adjusted in real time, the injection quantity of the reducing agent is adjusted to achieve the optimal purification effect of the tail gas of the engine, the injection adjusting range is effectively expanded, and the injection requirement in a wide range is met.
Drawings
FIG. 1 is a system component block of the present invention;
FIG. 2 is a system architecture and schematic of the present invention;
FIG. 3 is a schematic diagram of the spray conditioning system of the present invention divided into groups;
fig. 4 is a schematic diagram of the classification of the power and the injection quantity according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: referring to fig. 1, fig. 3 and fig. 4, the present invention provides a technical solution: a method for adapting the injection quantity of reducing agent in SCR system to the bench test of engine includes such steps as controlling the injection system including proportional electromagnetic valve, spray gun module including injection tube and spray gun, pressure sensor and relative control electromagnetic valve, controlling the state display interface including state display interface, parameter setting interface and control interface, automatically selecting relative injection regulation system after the power of engine is input in the window of parameter setting interface, setting the control unit to collect the signals of pressure sensor and system parameters, controlling the operation of relative electromagnetic valve, regulating the opening of proportional electromagnetic valve, regulating the injection quantity of reducing agent, synchronously displaying the currently activated system and its working state by state display interface, setting power coverage regulation window and injection quantity regulation window on parameter setting interface, the staff carries out the adjustment of appropriate amount according to actual conditions, and this parameter adjustment can only be carried out in the scope that the procedure is predetermine, and the adjustment is invalid and the touch-sensitive screen can give corresponding suggestion for exceeding the range value, the operation interface controls single control solenoid valve action, makes things convenient for system debugging and state test, and its reductant injection quantity's adaptation regulating method is: firstly, uniformly planning a test bed, dividing power of the test bed according to actual conditions, then designing a plurality of groups of injection adjusting systems by combining the capability of each test bed, the adjusting capability of a proportional solenoid valve and the injection capability of a spray gun assembly, so that the proportional solenoid valve and the spray gun assembly in each injection adjusting system are optimally matched, the injection adjusting systems are respectively three groups, namely an Aa system, a Bb system and a Dd system, the power coverage range of the test bed is A-F, wherein the A-C power corresponds to the adjustment of the Aa system, the B-E power corresponds to the adjustment of the Bb system, and the D-F power corresponds to the adjustment of the Dd system.
As shown in fig. 2, by switching two groups of injection regulation systems into an example, assuming that the number of a corresponding component of an Aa system matched with an engine in a C power section is 1, the number of a Bb system matched with the engine in a B-E power section is 2, and common devices are not numbered, when the engine bench test in the C power section is performed, a control unit opens a reducing agent supply electromagnetic valve and a reducing agent supply electromagnetic valve 1, the opening degree of the proportional electromagnetic valve 1 is adjusted in real time according to the current working condition of the engine, and a reducing agent enters a tail gas pipeline through a spray gun component 1 and is mixed with tail gas; after the engine stops working, the injection flow of the reducing agent is finished, the cleaning flow of the injection system 1 is started, the control unit closes the reducing agent supply electromagnetic valve, the cleaning electromagnetic valve 1 is opened, the proportional electromagnetic valve is adjusted to be maximum, the cleaning liquid is discharged from the spray gun through the injection pipeline, when a B-E power section engine bench test is carried out, the control unit opens the reducing agent supply electromagnetic valve and the reducing agent air supply electromagnetic valve 2, the opening degree of the proportional electromagnetic valve 2 is adjusted in real time according to the current working condition of the engine, the reducing agent enters the tail gas pipeline through the spray gun assembly 2 to be mixed with tail gas, after the engine stops working, the injection flow of the reducing agent is finished, and the cleaning flow of the injection system 2 is started: the control unit closes the reducing agent supply solenoid valve, opens the cleaning solenoid valve 2, adjusts the proportional solenoid valve to the maximum, and the cleaning liquid is discharged from the spray gun through the injection pipe.
Example 2: the difference from the embodiment 1 is that the action pipeline of the injection regulation system comprises an engine tail gas discharge pipeline, the engine tail gas discharge pipeline is used for guiding the discharge of the engine tail gas, mixing the engine tail gas with the atomized reducing agent, and NO in the tail gasXA channel for reaction and purification treatment and then exhausting into atmosphere, and an engine tail gas exhaust pipeline connected with the jet pipe.
Example 3: the difference from embodiment 1 is that the action conduit of the injection regulation system includes a reducing agent supply conduit, the reducing agent supply conduit is a conduit for delivering the reducing agent to the nozzle assembly, and the reducing agent solution passes through a reducing agent supply solenoid valve, a proportional solenoid valve, and a reducing agent liquid pressure sensor along the reducing agent supply conduit in sequence into the nozzle assembly.
Example 4: the difference from embodiment 1 is that the action pipeline of the injection regulation system comprises a cleaning solution supply pipeline, the cleaning solution supply pipeline is used for conveying cleaning solution with certain pressure to the injection system, the cleaning solution passes through a cleaning solution electromagnetic valve and sequentially passes through a proportional electromagnetic valve, a reducing agent liquid pressure electromagnetic valve and a nozzle assembly along a reducing agent supply pipeline, the proportional electromagnetic valve, a reducing agent liquid pressure sensor and the nozzle assembly are cleaned, the reducing agent supply electromagnetic valve and the cleaning electromagnetic valve work in a time-sharing mode, and only one electromagnetic valve is opened at the same time.
Example 5: the difference with embodiment 1 lies in that the action pipeline of the injection regulation system comprises a compressed air pipeline, the compressed air pipeline is used for conveying compressed air with certain pressure to atomize the reducing agent solution, the atomized reducing agent and the tail gas of the engine can be better mixed, the purification of the tail gas is facilitated, and the compressed air pipeline sequentially passes through a reducing agent air supply pressure sensor, a reducing agent air supply electromagnetic control valve and a spray gun assembly.
The method for switching and matching the engine power by using the multiple groups of injection adjusting systems meets the requirement of wide adjusting range of the reducing agent injection amount of the SCR system for tail gas treatment of the engine test bed, so that the SCR system is always in the optimal running state, the tail gas treatment effect is good, the utilization rate of the test bed is high, the cost is saved, and the method is suitable for market needs.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for adapting the injection quantity of a reducing agent of an SCR system to an engine bench test is characterized in that: the reducing agent injection quantity adaptive regulation method comprises the following steps of: firstly, uniformly planning a test bed, dividing the power of the test bed according to the actual condition, and then designing a plurality of groups of injection regulating systems by combining the capacity of each test bed, the regulating capacity of a proportional solenoid valve and the injection capacity of a spray gun assembly, so that the proportional solenoid valve and the spray gun assembly in each injection regulating system are optimally matched.
2. The method of adapting an engine bench test for SCR system reductant injection of claim 1, wherein: the injection adjusting systems are respectively provided with three groups, namely an Aa system, a Bb system and a Dd system, the power coverage range of the test bed is A-F, wherein the A-C power corresponds to the adjustment of the Aa system, the B-E power corresponds to the adjustment of the Bb system, and the D-F power corresponds to the adjustment of the Dd system.
3. The method of adapting an engine bench test for SCR system reductant injection of claim 1, wherein: the control unit comprises a state display interface, a parameter setting interface and an operation interface, and after the engine power is input into a corresponding window of the parameter setting interface, the system automatically selects a corresponding injection regulation system.
4. The method of adapting engine bench testing of an SCR system reductant injection quantity according to claim 3, characterized in that: the state display interface synchronously displays the currently activated system and the working state of the system, the parameter setting interface is provided with a power coverage range adjusting window and a spraying amount range adjusting window, a worker can adjust the parameters appropriately according to the actual condition, the parameter adjustment can only be carried out within a preset range of a program, the adjustment beyond the range value is invalid, a touch screen gives corresponding prompts, and the control interface controls a single control electromagnetic valve to act, so that the system debugging and the state testing are facilitated.
5. The method of adapting an engine bench test for SCR system reductant injection of claim 1, wherein: the action pipeline of the injection regulating system comprises an engine tail gas exhaust pipeline, and the engine tail gas exhaust pipeline is connected with the injection pipe.
6. The method of adapting an engine bench test for SCR system reductant injection of claim 1, wherein: the action pipeline of the injection regulation system comprises a reducing agent supply pipeline, and reducing agent solution sequentially passes through a reducing agent supply electromagnetic valve, a proportional electromagnetic valve and a reducing agent liquid pressure sensor along the reducing agent supply pipeline and enters the nozzle assembly.
7. The method of adapting an engine bench test for SCR system reductant injection of claim 6, wherein: the action pipeline of the injection regulation system comprises a cleaning liquid supply pipeline, cleaning liquid passes through a cleaning liquid electromagnetic valve and sequentially passes through a proportional electromagnetic valve, a reducing agent liquid pressure electromagnetic valve and a nozzle assembly along a reducing agent supply pipeline to clean the reducing agent supply pipeline, the proportional electromagnetic valve, a reducing agent liquid pressure sensor and the nozzle assembly, the reducing agent supply electromagnetic valve and the cleaning electromagnetic valve work in a time-sharing mode, and only one electromagnetic valve is opened at the same time.
8. The method of adapting an engine bench test for SCR system reductant injection of claim 1, wherein: the action pipeline of the injection regulating system comprises a compressed air pipeline, and the compressed air pipeline sequentially passes through a reducing agent air supply pressure sensor, a reducing agent air supply electromagnetic control valve and a spray gun assembly.
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| CN202110908382.8A CN113588276A (en) | 2021-08-09 | 2021-08-09 | Method for adapting reducing agent injection quantity of SCR system to engine bench test |
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| CN202110908382.8A CN113588276A (en) | 2021-08-09 | 2021-08-09 | Method for adapting reducing agent injection quantity of SCR system to engine bench test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781517A (en) * | 2012-09-14 | 2015-07-15 | Mtu腓特烈港有限责任公司 | Scr module |
| CN104775876A (en) * | 2015-02-13 | 2015-07-15 | 江苏大学 | Exhaust smoke passage integrated purification system for plurality of diesel engine test table frames |
| 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 |
| CN208330496U (en) * | 2018-06-19 | 2019-01-04 | 中国石油天然气集团有限公司 | A kind of Test Rig SCR denitration equipment |
| CN109944666A (en) * | 2019-05-09 | 2019-06-28 | 华东交通大学 | A kind of SCR system reducing agent supply amount adaptive correction method based on model |
| CN110295979A (en) * | 2019-06-28 | 2019-10-01 | 潍柴动力股份有限公司 | A kind of reducing agent ejection control method and device |
| CN112253290A (en) * | 2020-11-04 | 2021-01-22 | 河南柴油机重工有限责任公司 | SCR control system and method for marine engine tail gas treatment |
| CN112823237A (en) * | 2018-10-09 | 2021-05-18 | 日本发动机股份有限公司 | SCR system for ship |
-
2021
- 2021-08-09 CN CN202110908382.8A patent/CN113588276A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781517A (en) * | 2012-09-14 | 2015-07-15 | Mtu腓特烈港有限责任公司 | Scr module |
| CN104775876A (en) * | 2015-02-13 | 2015-07-15 | 江苏大学 | Exhaust smoke passage integrated purification system for plurality of diesel engine test table frames |
| 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 |
| CN208330496U (en) * | 2018-06-19 | 2019-01-04 | 中国石油天然气集团有限公司 | A kind of Test Rig SCR denitration equipment |
| CN112823237A (en) * | 2018-10-09 | 2021-05-18 | 日本发动机股份有限公司 | SCR system for ship |
| CN109944666A (en) * | 2019-05-09 | 2019-06-28 | 华东交通大学 | A kind of SCR system reducing agent supply amount adaptive correction method based on model |
| CN110295979A (en) * | 2019-06-28 | 2019-10-01 | 潍柴动力股份有限公司 | A kind of reducing agent ejection control method and device |
| CN112253290A (en) * | 2020-11-04 | 2021-01-22 | 河南柴油机重工有限责任公司 | SCR control system and method for marine engine tail gas treatment |
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