CN112903272B - SCR catalyst NH3 storage calibration test device and method - Google Patents
SCR catalyst NH3 storage calibration test device and method Download PDFInfo
- Publication number
- CN112903272B CN112903272B CN202110098151.5A CN202110098151A CN112903272B CN 112903272 B CN112903272 B CN 112903272B CN 202110098151 A CN202110098151 A CN 202110098151A CN 112903272 B CN112903272 B CN 112903272B
- Authority
- CN
- China
- Prior art keywords
- storage
- model
- storage amount
- conversion efficiency
- estimated
- 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
- 239000003054 catalyst Substances 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000004364 calculation method Methods 0.000 claims abstract description 20
- 238000004868 gas analysis Methods 0.000 claims abstract description 11
- 238000012937 correction Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 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
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0054—Ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Exhaust Gas After Treatment (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses an SCR catalyst NH3 storage calibration test device, which comprises: the estimated NH3 storage calculation module is used for estimating and calculating the NH3 storage amount in the catalyst through a measuring signal of the NOx sensor, a NH3 storage model in control software and a NOx conversion efficiency model; the actual NH3 storage calculation module is used for measuring and calculating the NH3 storage amount actually stored in the catalyst; the calibration correction module is used for recalibrating and correcting the NH3 storage model and the conversion efficiency model according to the difference value between the estimated NH3 storage amount and the actually calculated NH3 storage amount. According to the invention, the actual NH3 storage amount in the SCR catalyst can be measured and calculated by adopting the gas analysis equipment, the actual deviation is calculated with the estimated calculated NH3 storage amount, the purpose of correcting the NH3 storage model and the conversion efficiency model is achieved by recalibration, and the accurate control of NH3 storage and conversion efficiency is realized.
Description
Technical Field
The invention relates to the technical field of tail gas aftertreatment, in particular to an SCR catalyst NH3 storage calibration test device and method.
Background
The urea selective catalytic reduction (Selective Catalytic Reduction, SCR) technology has the advantages of high NOx conversion efficiency, strong sulfur resistance, low oil consumption and the like, and is one of effective technical measures for meeting national IV and above emission regulations of medium and heavy diesel vehicles in China. At present, the urea SCR technology is widely applied to medium and heavy diesel vehicles. However, with the continuous upgrade of national emission regulations, the state has stricter regulatory requirements on the conversion efficiency of the SCR system, and each engine and aftertreatment factory needs to develop a more accurate monitoring method to meet the requirements of the regulations.
Disclosure of Invention
The invention aims to solve the problems mentioned in the background section above by a device and a method for calibrating and testing NH3 storage of an SCR catalyst.
To achieve the purpose, the invention adopts the following technical scheme:
an SCR catalyst NH3 storage calibration test apparatus, the apparatus comprising: the device comprises an estimated NH3 storage calculation module, an actual NH3 storage calculation module and a calibration correction module; the estimated NH3 storage calculation module is used for estimating and calculating the NH3 storage amount in the catalyst through a measuring signal of the NOx sensor and a NH3 storage model and a NOx conversion efficiency model in control software; the actual NH3 storage calculation module is used for measuring and calculating the NH3 storage amount actually stored in the catalyst according to the gas analysis and measurement equipment; the calibration correction module is used for recalibrating and correcting the NH3 storage model and the conversion efficiency model according to the difference value between the estimated NH3 storage amount and the actually calculated NH3 storage amount.
Based on the SCR catalyst NH3 storage calibration test device, the invention discloses an SCR catalyst NH3 storage calibration test method, which comprises the following steps:
the estimated NH3 storage calculation module estimates and calculates the NH3 storage amount in the catalyst through a measuring signal of the NOx sensor and a NH3 storage model and a NOx conversion efficiency model in control software;
the actual NH3 storage calculation module measures and calculates the NH3 storage amount actually stored in the catalyst according to the gas analysis measurement device;
and the calibration correction module recalibrates and corrects the NH3 storage model and the conversion efficiency model according to the difference value between the estimated calculated NH3 storage amount and the actually calculated NH3 storage amount.
According to the NH3 storage calibration test device and method for the SCR catalyst, disclosed by the invention, the actual NH3 storage amount in the SCR catalyst can be measured and calculated through adopting the gas analysis equipment, the actual deviation is calculated with the estimated NH3 storage amount, the purpose of correcting the NH3 storage model and the conversion efficiency model is achieved through recalibration, and the accurate control of NH3 storage and conversion efficiency in the product application process is realized.
Drawings
FIG. 1 is a flow chart of a method for calibrating and testing NH3 storage of an SCR catalyst according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating installation of a NOx sensor and a gas analysis apparatus according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It is further to be noted that, for convenience of description, only some, but not all, of the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains unless defined otherwise. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
The SCR catalyst NH3 storage calibration test apparatus in this embodiment includes: the device comprises an estimated NH3 storage calculation module, an actual NH3 storage calculation module and a calibration correction module; the estimated NH3 storage calculation module is used for estimating and calculating the NH3 storage amount in the catalyst through a measuring signal of the NOx sensor and a NH3 storage model and a NOx conversion efficiency model in control software; the actual NH3 storage calculation module is used for measuring and calculating the NH3 storage amount actually stored in the catalyst according to the gas analysis and measurement equipment; the calibration correction module is used for recalibrating and correcting the NH3 storage model and the conversion efficiency model according to the difference value between the estimated NH3 storage amount and the actually calculated NH3 storage amount.
Example two
As shown in fig. 1, fig. 1 is a flowchart of a method for calibrating and testing NH3 storage of an SCR catalyst according to an embodiment of the present invention. The NH3 storage calibration test method of the SCR catalyst in the embodiment comprises the following steps:
the estimated NH3 storage calculation module estimates and calculates the NH3 storage amount in the catalyst through the NH3 storage model in the NOx sensor measurement signal and the control software and the NOx conversion efficiency model.
The actual NH3 storage calculation module measures and calculates the NH3 storage amount actually stored in the catalyst according to the gas analysis measurement device; fig. 2 is a schematic diagram illustrating installation of a NOx sensor and a gas analysis device according to an embodiment of the present invention.
And the calibration correction module recalibrates and corrects the NH3 storage model and the conversion efficiency model according to the difference value between the estimated calculated NH3 storage amount and the actually calculated NH3 storage amount.
According to the technical scheme provided by the invention, the NH3 storage model and the NOx conversion efficiency model can be corrected through test comparison standards, so that the NH3 storage amount of the SCR catalyst can be accurately controlled, and finally the conversion efficiency can be controlled, so that the requirements of emission regulations can be met. According to the invention, the actual NH3 storage amount in the SCR catalyst can be measured and calculated by adopting the gas analysis equipment, the actual deviation is calculated with the estimated calculated NH3 storage amount, the purpose of correcting the NH3 storage model and the conversion efficiency model is achieved by recalibration, and the accurate control of NH3 storage and conversion efficiency in the product application process is realized.
Those skilled in the art will appreciate that implementing all or part of the above embodiments may be accomplished by way of computer programs, stored on a computer readable storage medium, which when executed may comprise the flow of embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, or the like.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (2)
1. An SCR catalyst NH3 storage calibration test apparatus, comprising: the device comprises an estimated NH3 storage calculation module, an actual NH3 storage calculation module and a calibration correction module; the estimated NH3 storage calculation module is used for estimating and calculating the NH3 storage amount in the catalyst through a measuring signal of the NOx sensor and a NH3 storage model and a NOx conversion efficiency model in control software; the actual NH3 storage calculation module is used for measuring and calculating the NH3 storage amount actually stored in the catalyst according to the gas analysis and measurement equipment; the calibration correction module is used for recalibrating and correcting the NH3 storage model and the conversion efficiency model according to the difference value between the estimated NH3 storage amount and the actually calculated NH3 storage amount.
2. A method for SCR catalyst NH3 storage calibration test, the method comprising:
the estimated NH3 storage calculation module estimates and calculates the NH3 storage amount in the catalyst through a measuring signal of the NOx sensor and a NH3 storage model and a NOx conversion efficiency model in control software;
the actual NH3 storage calculation module measures and calculates the NH3 storage amount actually stored in the catalyst according to the gas analysis measurement device;
and the calibration correction module recalibrates and corrects the NH3 storage model and the conversion efficiency model according to the difference value between the estimated calculated NH3 storage amount and the actually calculated NH3 storage amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110098151.5A CN112903272B (en) | 2021-01-25 | 2021-01-25 | SCR catalyst NH3 storage calibration test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110098151.5A CN112903272B (en) | 2021-01-25 | 2021-01-25 | SCR catalyst NH3 storage calibration test device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112903272A CN112903272A (en) | 2021-06-04 |
| CN112903272B true CN112903272B (en) | 2024-02-27 |
Family
ID=76119795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110098151.5A Active CN112903272B (en) | 2021-01-25 | 2021-01-25 | SCR catalyst NH3 storage calibration test device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112903272B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009024622A2 (en) * | 2007-07-31 | 2009-02-26 | Delphi Technologies Inc | System and method for selective catalytic reduction control |
| CN101639005A (en) * | 2008-07-30 | 2010-02-03 | 通用汽车环球科技运作公司 | Dosing agent injection control for selective catalytic reduction catalysts |
| CN103016112A (en) * | 2012-12-18 | 2013-04-03 | 潍柴动力股份有限公司 | Method and system for controlling emitted dose of urea solution by SCR (Selective Catalytic reduction) |
| CN103277177A (en) * | 2013-06-19 | 2013-09-04 | 潍柴动力股份有限公司 | Correction method, device and system for aging of selective catalytic reduction (SCR) |
| CN106682428A (en) * | 2016-12-29 | 2017-05-17 | 无锡威孚力达催化净化器有限责任公司 | SCR ammonia storage amount calculating method |
| CN106779259A (en) * | 2015-11-20 | 2017-05-31 | 亿海天成(北京)科技有限公司 | A kind of thermal power plant's fuel overall process intelligent management system |
| CN106837497A (en) * | 2017-02-24 | 2017-06-13 | 天津大学 | Diesel catalyst based on storage ammonia amount management in real time reduces method for urea injection control |
| CN108119209A (en) * | 2017-11-01 | 2018-06-05 | 联创汽车电子有限公司 | SCR catalyst front end ammonia density modification method and SCR processing systems |
| 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 |
| CN110244565A (en) * | 2019-06-21 | 2019-09-17 | 清华大学 | A kind of SCR system partition control method and device |
| CN110905639A (en) * | 2019-11-29 | 2020-03-24 | 东风商用车有限公司 | System and method for correcting SCR ammonia storage model |
| CN112240235A (en) * | 2019-07-17 | 2021-01-19 | 上海汽车集团股份有限公司 | SCR control method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9181835B2 (en) * | 2013-08-13 | 2015-11-10 | Caterpillar Inc. | Supervisory model predictive selective catalytic reduction control method |
| US10480375B2 (en) * | 2014-10-28 | 2019-11-19 | Cummins Emission Solutions Inc. | SCR conversion efficiency diagnostics |
-
2021
- 2021-01-25 CN CN202110098151.5A patent/CN112903272B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009024622A2 (en) * | 2007-07-31 | 2009-02-26 | Delphi Technologies Inc | System and method for selective catalytic reduction control |
| CN101639005A (en) * | 2008-07-30 | 2010-02-03 | 通用汽车环球科技运作公司 | Dosing agent injection control for selective catalytic reduction catalysts |
| CN103016112A (en) * | 2012-12-18 | 2013-04-03 | 潍柴动力股份有限公司 | Method and system for controlling emitted dose of urea solution by SCR (Selective Catalytic reduction) |
| CN103277177A (en) * | 2013-06-19 | 2013-09-04 | 潍柴动力股份有限公司 | Correction method, device and system for aging of selective catalytic reduction (SCR) |
| CN106779259A (en) * | 2015-11-20 | 2017-05-31 | 亿海天成(北京)科技有限公司 | A kind of thermal power plant's fuel overall process intelligent management system |
| CN106682428A (en) * | 2016-12-29 | 2017-05-17 | 无锡威孚力达催化净化器有限责任公司 | SCR ammonia storage amount calculating method |
| CN106837497A (en) * | 2017-02-24 | 2017-06-13 | 天津大学 | Diesel catalyst based on storage ammonia amount management in real time reduces method for urea injection control |
| CN108119209A (en) * | 2017-11-01 | 2018-06-05 | 联创汽车电子有限公司 | SCR catalyst front end ammonia density modification method and SCR processing systems |
| 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 |
| CN110244565A (en) * | 2019-06-21 | 2019-09-17 | 清华大学 | A kind of SCR system partition control method and device |
| CN112240235A (en) * | 2019-07-17 | 2021-01-19 | 上海汽车集团股份有限公司 | SCR control method and device |
| CN110905639A (en) * | 2019-11-29 | 2020-03-24 | 东风商用车有限公司 | System and method for correcting SCR ammonia storage model |
Non-Patent Citations (2)
| Title |
|---|
| 基于模型的柴油机Urea-SCR系统闭环控制策略仿真;石秀勇;罗亨波;倪计民;彭煌华;王琦玮;刘越;;内燃机学报(第04期);正文第346-353页 * |
| 赵彦光.柴油机SCR技术尿素喷雾热分解及氨存储特性的试验研究.中国博士学位论文全文数据库 工程科技Ⅱ辑（月刊）.2013,(第07期),正文第80-82页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112903272A (en) | 2021-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10077700B2 (en) | Method for checking the plausibility of a NOx sensor in an SCR catalytic converter system | |
| US11313268B2 (en) | Method of monitoring an SCR catalyst | |
| US8893475B2 (en) | Control system for doser compensation in an SCR system | |
| AU2010334855B2 (en) | Method and device for controlling an SCR catalytic converter of a vehicle | |
| US8635030B2 (en) | Method for the determination of a NOx concentration value upstream of a SCR catalyst in a diesel engine | |
| US8635007B2 (en) | Filtering method and filter for a NOX sensor of an exhaust gas system | |
| EP2890874B1 (en) | Method and system for estimating reagent quality | |
| CN106014571B (en) | The computational methods of engine original machine NOx value | |
| KR102660647B1 (en) | Method for correcting a modeled ammonia filling level | |
| CN110273737B (en) | Thermal failure fault-tolerant control method and device for catalyst of diesel engine aftertreatment system | |
| CN111263848A (en) | Method for operating an exhaust gas aftertreatment system of a diesel engine and exhaust gas aftertreatment system | |
| KR20180002057A (en) | Error detection in a scr-system by means of a ammonia-filling level | |
| US20150143884A1 (en) | Method and Apparatus for Estimating a Dosing-Error in a Selective Catalytic Reduction System | |
| CN110985174B (en) | SCR system conversion efficiency monitoring system and method | |
| CN112903272B (en) | SCR catalyst NH3 storage calibration test device and method | |
| KR20180002058A (en) | Error detection in a scr-system by means of efficiency | |
| CN112983613B (en) | Nitrogen-oxygen sensor fault judgment method and related device | |
| CN109681298B (en) | Control system for urea injection self-adaptive correction based on NOx sensor | |
| CN111102053B (en) | Diagnostic system and method for preventing mounting position of NOx sensor from being tampered | |
| US10385754B2 (en) | Method and apparatus for monitoring flow resistance in an exhaust aftertreatment system | |
| CN108603434B (en) | Method and apparatus for correcting errors of a particulate matter sensor | |
| US11307102B2 (en) | System and a method for determining a correct or incorrect position of a temperature sensor of an emission control system | |
| CN114233447B (en) | Efficiency detection method and device for particle catcher, electronic equipment and storage medium | |
| CN116136189A (en) | Method for determining the exhaust gas content of an exhaust gas of an internal combustion engine in terms of ammonia and nitrogen oxide content in an exhaust gas system | |
| CN111927606B (en) | Determination of evaluation time point for diagnosis |
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 |