CN119712286B - A hydrogen internal combustion engine after-treatment device and control method, and an engine - Google Patents

A hydrogen internal combustion engine after-treatment device and control method, and an engine

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Publication number
CN119712286B
CN119712286B CN202510056454.9A CN202510056454A CN119712286B CN 119712286 B CN119712286 B CN 119712286B CN 202510056454 A CN202510056454 A CN 202510056454A CN 119712286 B CN119712286 B CN 119712286B
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China
Prior art keywords
scr
temperature
exhaust
nox
hydrogen
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CN202510056454.9A
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Chinese (zh)
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CN119712286A (en
Inventor
马文晓
孙楠楠
耿宗起
孙明雪
闫彩彩
陈金风
吕志华
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Priority to CN202510056454.9A priority Critical patent/CN119712286B/en
Publication of CN119712286A publication Critical patent/CN119712286A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2046—Periodically cooling catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series the purifying devices are of the same type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/04—Adding substances to exhaust gases the substance being hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486—Means to prevent the substance from freezing
    • 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
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The application provides a hydrogen internal combustion engine aftertreatment device, a control method and an engine, which are applied to the technical field of automobile engines, and comprise that an intelligent control valve in the hydrogen internal combustion engine aftertreatment device is respectively connected with an exhaust inlet, an input end of an H 2 SCR and an input end of a first pipeline, an output end of the first pipeline is connected with the SCR, an output end of the H 2 SCR is connected with the SCR through a second pipeline, when the exhaust temperature is smaller than a first preset temperature, the intelligent control valve controls the H 2 SCR to be conducted with the exhaust inlet, the first pipeline is not conducted with the exhaust inlet, the H 2 SCR is used for converting NOx in the exhaust, the problem of low-temperature urea crystallization and the problem of reducing NOx conversion rate are solved, when the exhaust temperature is not smaller than the first preset temperature, the intelligent control valve controls the H 2 SCR to be not conducted with the exhaust inlet, the first pipeline is conducted with the exhaust inlet, the SCR is used for converting NOx in the exhaust, and the NOx conversion rate is improved by combining the H 2 SCR with the SCR.

Description

Post-treatment device and control method for hydrogen internal combustion engine and engine
Technical Field
The application relates to the technical field of automobile engines, in particular to a hydrogen internal combustion engine aftertreatment device, a control method and an engine.
Background
NOx (nitrogen oxides) is a major pollutant in automobile exhaust and includes Nitric Oxide (NO), nitrogen dioxide (NO 2), and other oxides of nitrogen. These compounds are not only harmful to the environment, but also have a bad influence on the health of the human body. Therefore, effective reduction of NOx emissions is critical in vehicle exhaust treatment systems.
Currently, the primary method of reducing vehicle emissions NOx is to use a Selective Catalytic Reduction (SCR) technique. The SCR system converts NOx into nitrogen and water under the action of a specific catalyst by adding ammonia or urea as a reducing agent, and the treatment technology has the problems of low-temperature urea crystallization and the like, so that the NOx conversion efficiency of vehicle exhaust is low.
Disclosure of Invention
In view of the above, the embodiment of the application provides a post-treatment device and a control method for a hydrogen internal combustion engine, and the engine, in the scheme provided by the application, the H 2 SCR is used for converting NOx in exhaust gas at low temperature, so that the problem that the SCR is easy to generate urea crystallization at low temperature is solved, the problem of reducing the conversion rate of NOx is solved, and the heat dissipation device is used for dissipating heat and reducing the temperature of the H 2 SCR, so that the temperature range applicable to the H 2 SCR is improved, the SCR is used for converting NOx in exhaust gas at medium and high temperatures, and the conversion rate of NOx is improved by combining the H 2 SCR with the SCR.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
A hydrogen internal combustion engine aftertreatment device, comprising:
The heat dissipation device, the selective catalytic reduction device SCR taking NH 3 as a reducing agent and the selective hydrogen catalytic reduction catalyst H 2 SCR taking H 2 as a reducing agent;
The input end of the SCR is respectively connected with the output end of the first pipeline and the output end of the second pipeline;
The output end of the H 2 SCR is connected with the input end of the second pipeline;
the input end of the H 2 SCR and the input end of the first pipeline are connected with an intelligent control valve;
The intelligent control valve is used for controlling the input end of the H 2 SCR and the conduction state of the input end of the first pipeline and the exhaust inlet;
The heat dissipation device is used for dissipating heat of the H 2 SCR.
In the above-mentioned aftertreatment device for a hydrogen internal combustion engine, optionally, the H 2 SCR is provided with a heat-dissipating fin.
The above-mentioned hydrogen internal combustion engine aftertreatment device, optionally, the heat dissipating device includes:
A wind force regulator;
The air regulator is used for regulating the air flow of the heat dissipation device to the H 2 SCR.
A control method of a hydrogen internal combustion engine aftertreatment device, applied to the hydrogen internal combustion engine aftertreatment device, the method comprising:
collecting working state information of the hydrogen internal combustion engine aftertreatment device in real time;
When the exhaust temperature in the working state information is smaller than a first preset temperature, controlling the exhaust to be treated to flow through a selective hydrogen catalytic reduction catalyst H 2 SCR taking H 2 as a reducing agent in the hydrogen internal combustion engine aftertreatment device, then flow through a selective catalytic reduction catalyst SCR taking NH 3 as a reducing agent in the hydrogen internal combustion engine aftertreatment device, and treating NOx in the exhaust by using the H 2 SCR and the SCR by using a preset low-temperature exhaust treatment strategy;
when the exhaust temperature in the working state information is greater than or equal to a first preset temperature, controlling the exhaust to be treated to directly flow through the SCR without flowing through the H 2 SCR, using a preset high-temperature exhaust treatment strategy, controlling a preset urea nozzle to spray urea, and enabling the SCR to treat NOx in the exhaust.
The method, optionally, the using a preset low-temperature exhaust gas treatment strategy, using the H 2 SCR and the SCR to treat NOx in exhaust gas, includes:
judging whether the exhaust temperature in the working state information is less than or equal to a second preset temperature in the low-temperature exhaust treatment strategy;
when the exhaust temperature in the working state information is smaller than or equal to a second preset temperature in the low-temperature exhaust treatment strategy, judging whether the tail-emission NOx value in the working state information is smaller than or equal to a NOx limit value in the low-temperature exhaust treatment strategy;
When the tail emission NOx value in the working state information is smaller than or equal to the NOx limit value, reducing NOx in exhaust gas by using the H 2 SCR, and treating NOx in the exhaust gas subjected to H 2 SCR treatment by using the SCR;
When the tail emission NOx value in the working state information is larger than the NOx limit value, supplementing hydrogen to the exhaust before the exhaust to be treated flows to the H 2 SCR, treating NOx in the exhaust after supplementing hydrogen by using the H 2 SCR, and treating NOx in the exhaust after being treated by using the H 2 SCR by using the SCR.
The method, optionally, the supplementing hydrogen to the exhaust gas includes:
acquiring hydrogen supplementing parameters;
And determining a hydrogen supplementing value by using the hydrogen supplementing parameter, and controlling the injection quantity of the hydrogen injected by the preset hydrogen injector to the exhaust gas according to the hydrogen supplementing value.
The method, optionally, further comprises:
When the exhaust temperature in the working state information is greater than a second preset temperature in the low-temperature exhaust treatment strategy, controlling a heat dissipation device in the hydrogen internal combustion engine aftertreatment device to conduct heat dissipation treatment on the H 2 SCR based on the preset heat dissipation strategy, enabling the exhaust to be treated by the H 2 SCR, and then using the SCR to treat the exhaust.
In the foregoing method, optionally, the controlling, based on a preset heat dissipation policy, a heat dissipation device in the post-processing device of the hydrogen internal combustion engine to perform heat dissipation processing on the H 2 SCR includes:
And controlling the opening degree of a wind regulator in the heat dissipation device to be a percentage, so that the H 2 SCR is subjected to heat dissipation treatment after the gas for heat dissipation passes through the wind regulator, and the opening degree of the wind regulator is regulated according to the temperature change of the H 2 SCR.
In the above method, optionally, the controlling the preset urea nozzle to spray urea includes:
Acquiring urea supplementing parameters;
and determining urea injection quantity by using the urea supplementing parameter, and controlling the urea nozzle to inject urea according to the urea injection quantity.
An engine comprising the hydrogen internal combustion engine aftertreatment device described above.
Compared with the prior art, the application has the following advantages:
The application provides a hydrogen internal combustion engine aftertreatment device, a control method and an engine, and particularly comprises the steps that an intelligent control valve in the hydrogen internal combustion engine aftertreatment device is respectively connected with an exhaust inlet, an input end of an H 2 SCR and an input end of a first pipeline, an output end of the first pipeline is connected with the SCR, an output end of the H 2 SCR is connected with the SCR through a second pipeline, the intelligent control valve is used for controlling the conduction state of the input end of the H 2 SCR and the input end of the first pipeline and the exhaust inlet, when the exhaust temperature of the hydrogen internal combustion engine aftertreatment device is smaller than a first preset temperature, the intelligent control valve is used for controlling the conduction of the input end of the H 2 SCR and the exhaust inlet, the input end of the first pipeline is not conducted with the exhaust inlet, under the condition that the temperature is lower, the H 2 SCR is used for converting NOx in exhaust, the problem of low NOx conversion rate is solved, and when the exhaust temperature is higher than or equal to the first preset temperature, the intelligent control valve is used for controlling the non-conduction state of the input end of the H 2 SCR and the exhaust inlet, and the input end of the first pipeline is conducted with the exhaust inlet. At different temperatures, different NOx conversion modes are used, so that the NOx conversion rate is improved, and the NOx emission of automobile exhaust is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a post-treatment device for a hydrogen internal combustion engine according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating a method for processing a post-processing device for a hydrogen internal combustion engine according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating an exemplary process for treating NOx in exhaust gas using H 2 SCR and SCR provided in an embodiment of the present application;
FIG. 4 is an exemplary diagram of a full open key Wen Geshan provided by an embodiment of the present application;
FIG. 5 is an exemplary diagram of a key Wen Geshan full off provided by an embodiment of the present application;
fig. 6 is an exemplary diagram for adjusting the opening of a temperature adjusting grille according to an embodiment of the present application;
Fig. 7 is another flowchart of a control method of a hydrogen internal combustion engine aftertreatment device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Term interpretation:
SCR SELECTIVE CATALYTIC Reduction, a selective catalytic reducer, taking NH 3 as a reducing agent;
H 2 SCR is a selective hydrogen catalytic reduction catalyst taking H 2 as a reducing agent.
As known from the background art, the conventional SCR technology is used to treat NOx in exhaust gas of an automobile, so that urea crystallization is very easy to occur when the temperature is low, the conversion rate of NOx is reduced, and NOx in the exhaust gas cannot be sufficiently converted.
There are methods of treating NOx in exhaust gas using SCR technology, and there is a method of treating NOx in exhaust gas using H 2 SCR, but this treatment method has low NOx conversion efficiency at medium and high temperatures, and has a narrow temperature window, and cannot sufficiently convert NOx in exhaust gas at medium and high temperatures.
In order to solve the problems, the application provides a hydrogen internal combustion engine aftertreatment device and a control method, wherein the input end of an SCR in the hydrogen internal combustion engine aftertreatment device is respectively connected with the output end of a first pipeline and the output end of a second pipeline, the output end of an H 2 SCR is connected with the input end of the second pipeline, the input end of the H 2 SCR and the input end of the first pipeline are both connected with an intelligent control valve, the intelligent control valve is used for controlling the conduction state of the input end of the H 2 SCR and the input end of the first pipeline and an exhaust inlet, when the exhaust temperature in the working state information of the hydrogen internal combustion engine aftertreatment device is smaller than a first preset temperature, the input end of the H 2 SCR is conducted with the exhaust inlet, the input end of the first pipeline is not conducted with the exhaust inlet, and therefore, NOx in exhaust is converted by the H 2 SCR first, and then NOx in the exhaust is converted by the SCR, therefore, the problem that the low-temperature urea crystallization is caused by the use of the H 2 SCR, when the conversion is low-temperature urea is converted, the conversion efficiency is improved, and when the conversion is not lower-temperature is higher than the first preset temperature, and the NOx is conducted with the first pipeline, and the NOx is directly converted by the first pipeline, and the NOx is not conducted with the first pipeline, and the NOx is directly converted by the first pipeline. Therefore, different NOx conversion modes are used at different temperatures, so that the NOx conversion rate is improved, and the NOx emission of automobile exhaust is reduced.
The application is operational with numerous general purpose or special purpose computing device environments or configurations. Such as a personal computer, a server computer, a hand-held or portable device, a tablet device, a multiprocessor apparatus, a distributed computing environment including any of the above, and the like.
Referring to fig. 1, a schematic structural diagram of a post-processing device for a hydrogen internal combustion engine according to an embodiment of the present application is specifically described below:
The hydrogen internal combustion engine aftertreatment device comprises a heat dissipation device 15, a selective catalytic reduction device SCR 5 taking NH 3 as a reducing agent and a selective hydrogen catalytic reduction catalyst H 2 SCR 4 taking H 2 as the reducing agent.
The input end of the SCR 5 is connected with the output end of the first pipeline 3 and the output end of the second pipeline 2, respectively.
The output end of the H 2 SCR 4 is connected with the input end of the second pipeline 2, and the H 2 SCR 5 is provided with radiating fins 11.
The input end of the H 2 SCR 4 and the input end of the first pipeline 3 are connected with the intelligent control valve 10.
The intelligent control valve 10 is used for controlling the conducting state of the input end of the H 2 SCR and the input end of the first pipeline 3 and the exhaust inlet 1.
The heat dissipation device 15 is used for dissipating heat of the H 2 SCR 5, wherein the heat dissipation device 15 comprises an air regulator 13, an air guide pipeline 12 and an air outlet 14, the air regulator 13 can be a temperature regulation grid, the air regulator is used for regulating air flow of the heat dissipation device to the H 2 SCR 4, and the air flow of the heat dissipation device to the H 2 SCR 4 is regulated by controlling opening of the air regulator.
Further, a first NOx sensor 9 and a temperature sensor 8 are provided at the exhaust gas inlet 1, the first NOx sensor 9 being for detecting the NOx content in the exhaust gas at the exhaust gas inlet, and the temperature sensor 8 being for detecting the temperature of the exhaust gas at the exhaust gas inlet. The input end of the SCR 5 is provided with a urea nozzle 7, the output end of the SCR 5 is provided with a second NOx sensor 6, and the second NOx sensor 6 is used for detecting the NOx content in the exhaust gas at the output end of the SCR. Preferably, the first NOx sensor may be regarded as a front NOx sensor and the second NOx sensor may be regarded as a rear NOx sensor.
Referring to fig. 2, a flowchart of a processing method of a post-processing apparatus for a hydrogen internal combustion engine according to an embodiment of the present application is specifically described below:
S201, working state information of a post-processing device of the hydrogen internal combustion engine is collected in real time.
The operating state information includes, but is not involved in, information collected by each sensor in the hydrogen engine aftertreatment device and device operating parameters of the hydrogen engine aftertreatment device, such as temperature of the exhaust gas collected by the temperature sensor, NOx value in the untreated exhaust gas collected by the first NOx sensor (which may be understood as an as-emitted NOx value), NOx value in the exhaust gas output from the SCR collected by the second NOx sensor (which may be understood as an emitted NOx).
S202, judging whether the exhaust temperature in the working state information is greater than or equal to a first preset temperature, executing S203 when the exhaust temperature in the working state information is smaller than the first preset temperature, and executing S204 when the exhaust temperature in the working state information is greater than or equal to the first preset temperature.
The first preset temperature may be set according to actual requirements, and exemplary, the first preset temperature may be set to 250 ℃, and preferably, when the first preset temperature is set, the minimum temperature of the SCR for NOx conversion efficiency may be close to 100%.
Therefore, when the exhaust temperature is less than the first preset temperature, the H 2 SCR is used for treating the NOx, so that the conversion rate of the NOx of the exhaust at the working temperature unsuitable for the SCR can be improved.
S203, controlling the exhaust gas to be treated to flow through a selective hydrogen catalytic reduction catalyst H 2 SCR taking H 2 as a reducing agent in a hydrogen internal combustion engine aftertreatment device, then flow through a selective catalytic reduction catalyst SCR taking NH 3 as a reducing agent in the hydrogen internal combustion engine aftertreatment device, and treating NOx in the exhaust gas by using the H 2 SCR and the SCR by using a preset low-temperature exhaust gas treatment strategy.
In the embodiment provided by the application, the intelligent control valve is opened, so that the exhaust inlet is controlled to be communicated with the input end of the H 2 SCR through the intelligent control valve, the exhaust inlet is not communicated with the input end of the first pipeline, and the gas circulation of the first pipeline is cut off, so that the exhaust of the exhaust inlet 1 completely passes through the H 2 SCR and the second pipeline and then flows to the SCR.
When the exhaust gas passes through the H 2 SCR, the H 2 SCR processes NOx in the exhaust gas, and the reaction generated when the H 2 SCR processes NOx is as follows:
4H2+2NO+O2 → N2+4H2O (1)
2H2+O2 → 2H2O (2)
Further, in the process of using a low-temperature exhaust gas treatment strategy and using H 2 SCR and SCR to treat NOx in exhaust gas, the urea nozzle does not spray urea, so that the conversion cost of NOx is reduced. The H 2 SCR has high conversion rate to NOx when the temperature is low, so that the H 2 SCR is used for converting NOx in exhaust gas when the temperature is low, and the problems of low conversion efficiency of NOx due to low-temperature urea crystallization of the SCR are solved.
Further, on the premise that the exhaust temperature in the working state information is smaller than the first preset temperature, a low-temperature exhaust treatment strategy is used, and the process of treating NOx in the exhaust gas by using H 2 SCR and SCR is shown in FIG. 3, and specifically described as follows:
S301, judging whether the exhaust temperature in the working state information is smaller than or equal to a second preset temperature in the low-temperature exhaust treatment strategy, executing S302 when the exhaust temperature in the working state information is smaller than or equal to the second preset temperature in the low-temperature exhaust treatment strategy, and executing S305 when the exhaust temperature in the working state information is larger than the second preset temperature in the low-temperature exhaust treatment strategy.
It should be noted that the second preset temperature is smaller than the first preset temperature, and the second preset temperature may be set according to actual requirements, and exemplary, the second preset temperature may be set to 200 ℃.
S302, judging whether the tail-emission NOx value in the working state information is smaller than or equal to the NOx limit value in the low-temperature exhaust treatment strategy, executing S303 when the tail-emission NOx value in the working state information is smaller than or equal to the NOx limit value, and executing S304 when the tail-emission NOx value in the working state information is larger than the NOx limit value.
The NOx limit in the low temperature exhaust gas treatment strategy may be understood as the target value of tailpipe NOx of the hydrogen internal combustion engine aftertreatment device.
The exhaust NOx value in the operating state information is detected by the second NOx sensor, where the exhaust NOx can be understood as the NOx value of the actual exhaust gas of the hydrogen internal combustion engine aftertreatment device.
S303, reducing the NOx in the exhaust gas by using H 2 SCR, and treating the NOx in the exhaust gas subjected to H 2 SCR by using SCR.
S304, supplementing hydrogen to the exhaust before the exhaust to be treated flows to the H 2 SCR, treating NOx in the exhaust after supplementing hydrogen by using the H 2 SCR, and treating NOx in the exhaust after being treated by using the H 2 SCR by using the SCR.
When the end NOx value in the operating state information is less than or equal to the NOx limit, the amount of unburned H 2 in the exhaust gas is sufficient to treat NOx in the displacement without additional hydrogen supplementation, and when the end NOx value in the operating state information is greater than the NOx limit, NOx emissions will approach the emission limit, at which point the amount of unburned H 2 in the exhaust gas is insufficient relative to the treated NOx, requiring additional H 2 supplementation.
The hydrogen supplementing process includes the steps of obtaining hydrogen supplementing parameters, determining hydrogen supplementing values by using the hydrogen supplementing parameters, controlling the injection quantity of the hydrogen injected by the preset hydrogen injector to the exhaust gas according to the hydrogen supplementing values, further, the hydrogen supplementing parameters include, but are not limited to, the difference value between the tail exhaust NOx value and the NOx limiting value, the temperature value of H 2 SCR and the airspeed, determining a request supplementing value, namely, an additional supplementing H 2 required value, at a pre-calibrated H 2 required value MAP based on the hydrogen supplementing parameters, and controlling the injection quantity of the hydrogen injected by the hydrogen injector to supplement the hydrogen to the exhaust gas by a control unit. Further, the hydrogen injection gas may be disposed above the engine cylinder, i.e., a small amount of hydrogen is directly injected into the combustion chamber during the exhaust stroke, and the hydrogen injection gas may be pushed out of the cylinder by the exhaust process and flow into the tail pipe, and the hydrogen injector may be disposed at the front end of the intelligent control valve.
Therefore, the H 2 SCR can fully convert NOx in the exhaust gas by supplementing hydrogen to the exhaust gas, and the conversion rate of the NOx is improved.
S305, controlling a heat dissipation device in a post-treatment device of the hydrogen internal combustion engine to conduct heat dissipation treatment on the H 2 SCR based on a preset heat dissipation strategy, enabling exhaust to be treated by the H 2 SCR, and then using the SCR to treat the exhaust.
It should be noted that, when the exhaust temperature is greater than the second preset temperature and less than the first preset temperature, S305 is executed, that is, based on a preset heat dissipation strategy, the heat dissipation device in the post-processing device of the hydrogen internal combustion engine is controlled to perform heat dissipation processing on the H 2 SCR, specifically, the opening degree in the air regulator in the heat dissipation device is controlled to be a percentage, so that the air for heat dissipation performs heat dissipation processing on the H 2 SCR after passing through the air regulator, and the opening degree of the air regulator is adjusted according to the temperature change of the H 2 SCR. Preferably, the temperature of the H 2 SCR can be the average temperature or the temperature detected at present.
For example, when the air regulator is a temperature adjustment grille, and when the exhaust temperature is greater than the second preset temperature and less than the first preset temperature, the opening of the adjustment Wen Geshan is a percentage, that is, the temperature adjustment grille is fully opened, and referring to fig. 4, an exemplary diagram of fully opening the adjustment Wen Geshan is provided in an embodiment of the present application. Further, after the heat dissipation of the H 2 SCR is started, the opening degree of the temperature adjusting grille is adjusted according to the temperature change of the H 2 SCR, specifically, when the temperature of the H 2 SCR is smaller than the second preset temperature and larger than the third preset temperature, the temperature adjusting grille is partially opened, that is, the opening degree of the temperature adjusting grille is not a percentage, as shown in the heat dissipation device of fig. 1, an example diagram of the temperature adjusting grille partially opened is shown, when the temperature of the H 2 SCR is smaller than or equal to the third preset temperature, the opening degree of the temperature adjusting grille Wen Geshan is zero, that is, the temperature adjusting grille Wen Geshan Quan Guan is shown, referring to fig. 5, an example diagram of the total closing of the temperature adjusting grille Wen Geshan provided by the embodiment of the application is shown, and the third preset temperature can be set according to actual needs.
Preferably, the opening degree of the temperature adjusting grid can be adjusted along with the change of the temperature of the H 2 SCR, referring to fig. 6, which is an exemplary diagram of the opening degree adjustment of the temperature adjusting grid provided by the embodiment of the present application, where T3 is a third preset temperature, T2 is a second preset temperature, T1 is a first preset temperature, tm is the temperature of the H 2 SCR, and as can be seen from the figure, the opening degree of the temperature adjusting grid can be linearly adjusted.
In the embodiment provided by the application, when the temperature of the H 2 SCR is smaller than or equal to the third preset temperature, wen Geshan Quan Guan is adjusted, and at the moment, the heat dissipation device does not cool the H 2 SCR any more, so that the H 2 SCR is prevented from being excessively cooled, the H 2 SCR can be in the temperature range of the highest efficient NOx conversion rate, and the time of the H 2 SCR in the temperature range of the highest efficient NOx conversion rate can be prolonged, so that the NOx conversion rate is improved.
In the scheme provided by the embodiment of the application, when the exhaust temperature is in a temperature range formed by the second preset temperature and the first preset temperature, the conversion efficiency of NOx of the H 2 SCR gradually becomes lower along with the rise of the exhaust temperature, but the conversion efficiency of NOx of the SCR does not reach the highest efficiency area in the temperature range, at the moment, the H 2 SCR can be used for continuously converting NOx, and a heat dissipation device can be used for carrying out heat dissipation treatment on the H 2 SCR, so that the temperature of the H 2 SCR is reduced, and the H 2 SCR is ensured to work in the highest efficiency temperature range.
Preferably, after the heat dissipating device is turned on, when the temperature of the H 2 SCR is less than or equal to the second preset temperature, in the process of treating NOx in the exhaust gas, the H 2 SCR needs to detect whether hydrogen needs to be replenished, specifically, for example, whether the tail exhaust NOx value is greater than the NOx limit value, when the tail exhaust NOx value is greater than the NOx limit value, the hydrogen needs to be replenished, and the manner of determining the replenishing amount of the hydrogen refers to the above description, which is not repeated herein, and when the tail exhaust NOx value is less than or equal to the NOx limit value, it is determined that hydrogen does not need to be replenished.
S204, controlling the exhaust to be treated to directly flow through the SCR without flowing through the H 2 SCR, and using a preset high-temperature exhaust treatment strategy to control a preset urea nozzle to spray urea and enable the SCR to treat NOx in the exhaust.
In the embodiment provided by the application, the intelligent control valve is closed, so that the exhaust inlet is controlled to be not communicated with the input end of the H 2 SCR through the intelligent control valve, the exhaust inlet is communicated with the input end of the first pipeline, and the gas circulation of the H 2 SCR is cut off, so that the exhaust of the exhaust inlet flows to the SCR through the first pipeline.
Further, the heat sink is in an off state.
The urea injection process of the urea nozzle is controlled by acquiring urea supplementing parameters, determining urea injection quantity by using the urea supplementing parameters, and controlling the urea nozzle to inject urea according to the urea injection quantity. The urea supplementing parameters comprise, but are not limited to, an original exhaust NOx value, an exhaust temperature and an SCR airspeed, and the urea injection quantity is determined in an ammonia storage closed loop MAP according to the original exhaust NOx value, the exhaust temperature value T and the SCR airspeed, so that the urea nozzle is controlled to inject urea in a closed loop manner.
In the scheme provided by the embodiment of the application, an intelligent control valve in a hydrogen internal combustion engine aftertreatment device is respectively connected with an exhaust inlet, an input end of an H 2 SCR and an input end of a first pipeline, an output end of the first pipeline is connected with the SCR, an output end of the H 2 SCR is connected with the SCR through a second pipeline, the intelligent control valve is used for controlling the input end of the H 2 SCR and the conduction state of the input end of the first pipeline and the exhaust inlet, when the exhaust temperature of the hydrogen internal combustion engine aftertreatment device is smaller than a first preset temperature, the intelligent control valve controls the input end of the H 2 SCR to be conducted with the exhaust inlet, the input end of the first pipeline is not conducted with the exhaust inlet, under the condition of lower temperature, the H 2 SCR is used for converting NOx in exhaust, the problem of low NOx conversion rate is solved, the intelligent control valve is used for controlling the input end of the H 2 SCR to be not conducted with the exhaust inlet when the exhaust temperature is larger than or equal to the first preset temperature, and therefore, the intelligent control valve is used for converting NOx in the condition of higher temperature. At different temperatures, different NOx conversion modes are used, so that the NOx conversion rate is improved, and the NOx emission of automobile exhaust is reduced.
Referring to fig. 7, another flowchart of a control method of a post-processing apparatus for a hydrogen internal combustion engine according to an embodiment of the present application is specifically described as follows:
The working state information of the post-processing device of the hydrogen internal combustion engine is collected, and the relevant description of the working state information is described above, and is not repeated here. Based on the exhaust temperature in the working state information, judging whether the exhaust temperature is smaller than or equal to a second preset temperature, when the exhaust temperature is smaller than or equal to the second preset temperature, controlling an exhaust inlet to be conducted with the H 2 SCR, enabling the exhaust inlet to be not conducted with a first pipeline, enabling the exhaust to flow to the SCR after being processed by the H 2 SCR, judging whether a tail exhaust NOx value is smaller than a NOx limit value in the process of processing NOx in the exhaust by the H 2 SCR, and controlling a hydrogen sprayer to spray hydrogen when the tail exhaust NOx value is smaller than the NOx limit value, wherein the process of determining the amount of the hydrogen sprayed by the hydrogen sprayer is described above without being repeated.
When the exhaust temperature is greater than the second preset temperature, judging whether the exhaust temperature is greater than or equal to the first preset temperature, and when the exhaust temperature is greater than or equal to the first preset temperature, controlling the exhaust inlet to be conducted with the H 2 SCR, enabling the exhaust inlet to be non-conducted with the first pipeline, enabling the exhaust to flow to the SCR after being processed by the H 2 SCR, and controlling the heat dissipation device to dissipate heat of the H 2 SCR. The heat dissipation process of the H 2 SCR by the heat dissipation device is controlled by judging whether the temperature of the H 2 SCR is smaller than a second preset temperature, controlling a temperature regulation grid of the heat dissipation device to be fully opened when the temperature of the H 2 SCR is not smaller than the second preset temperature, judging whether the temperature of the H 2 SCR is smaller than or equal to a third preset temperature and judging whether a tail NOx value is smaller than a NOx limit value when the temperature of the H 2 SCR is smaller than the second preset temperature, controlling the temperature regulation Wen Geshan Quan Guan when the temperature of the H 2 SCR is smaller than or equal to the third preset temperature, controlling the temperature regulation grid to be partially separated when the temperature of the H 2 SCR is larger than the third preset temperature, further controlling the hydrogen sprayer to spray hydrogen when the tail NOx value is determined to be smaller than the NOx limit value, and determining that the hydrogen supplementing is not needed when the tail NOx value is determined not smaller than the NOx limit value. Preferably, the third preset temperature is less than the second preset temperature.
Furthermore, the control mode provided by the application is performed in real time, so that the strategy applied to the conversion of NOx in the exhaust gas can be timely adjusted. According to the scheme provided by the application, the post-treatment device and the control method thereof integrating the advantages of the H 2 SCR high NOx conversion efficiency at low temperature and the SCR ultrahigh NOx conversion efficiency at medium and high temperature are provided, the H 2 SCR temperature control part is combined, the exhaust treatment capacity of the post-treatment tail gas NOx of the hydrogen internal combustion engine is improved to the greatest extent, the risk that the SCR is easy to crystallize at low temperature can be eliminated, the high-efficiency emission reduction of the tail gas NOx of the hydrogen internal combustion engine is achieved in a wide exhaust temperature range, the NOx emission problem of the hydrogen internal combustion engine is solved, the structure is simple, and the practicability is strong.
The after-treatment device for the hydrogen internal combustion engine can be combined with high NOx conversion efficiency of H 2 SCR at low temperature and high-efficiency NOx conversion area of SCR at medium and high temperature, eliminates the risk of easy urea crystallization of SCR at low temperature, achieves high-efficiency emission reduction of NOx in tail gas of the hydrogen internal combustion engine in a wide exhaust temperature range, solves the problem of NOx emission of the hydrogen internal combustion engine, has a simple structure and strong practicability, and can be further applied to the engine to reduce the content of NOx in exhaust gas emitted by the engine.
It should be noted that, the information (including but not limited to user equipment information, user personal information, etc.) and the data (including but not limited to data for analysis, stored data, presented data, etc.) related to the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data need to comply with the related laws and regulations and standards of the related country and region.
The specific implementation process and derivative manner of the above embodiments are all within the protection scope of the present invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1.一种氢内燃机后处理装置控制方法，其特征在于，该方法包括：1. A method for controlling a hydrogen internal combustion engine aftertreatment device, characterized in that the method comprises: 实时采集所述氢内燃机后处理装置的工作状态信息；collecting working status information of the hydrogen internal combustion engine post-processing device in real time; 当所述工作状态信息中的排气温度小于第一预设温度时，控制待处理的排气先流经所述氢内燃机后处理装置中的以H2为还原剂的选择性氢催化还原催化器H2SCR，再流经所述氢内燃机后处理装置中的以NH3为还原剂的选择性催化还原器SCR，并使用预设的低温排气处理策略，使用所述H2SCR和所述SCR处理排气中的NOx；When the exhaust temperature in the operating state information is less than a first preset temperature, controlling the exhaust gas to be treated to first flow through a selective hydrogen catalytic reduction ( H2SCR ) in the hydrogen internal combustion engine aftertreatment device using H2 as a reducing agent, and then flow through a selective catalytic reduction (SCR) in the hydrogen internal combustion engine aftertreatment device using NH3 as a reducing agent, and using a preset low-temperature exhaust treatment strategy to treat NOx in the exhaust gas using the H2SCR and the SCR; 当所述工作状态信息中的排气温度大于或等于第一预设温度时，控制待处理的排气不流经所述H2SCR，直接流经所述SCR，并使用预设的高温排气处理策略，控制预设的尿素喷嘴喷射尿素，并使所述SCR处理排气中的NOx；When the exhaust temperature in the operating state information is greater than or equal to a first preset temperature, the exhaust gas to be treated is controlled to flow directly through the SCR instead of the H2 SCR, and a preset high-temperature exhaust treatment strategy is used to control a preset urea nozzle to inject urea, and the SCR is used to treat NOx in the exhaust gas; 其中，所述使用预设的低温排气处理策略，使用所述H2SCR和所述SCR处理排气中的NOx，包括：The method of using the preset low-temperature exhaust gas treatment strategy and using the H 2 SCR and the SCR to treat NOx in the exhaust gas includes: 判断所述工作状态信息中的排气温度是否小于或等于所述低温排气处理策略中的第二预设温度；determining whether the exhaust temperature in the working status information is less than or equal to a second preset temperature in the low-temperature exhaust treatment strategy; 当所述工作状态信息中的排气温度小于或等于所述低温排气处理策略中的第二预设温度时，判断所述工作状态信息中的尾排NOx值是否小于或等于所述低温排气处理策略中的NOx限值；When the exhaust temperature in the working state information is less than or equal to the second preset temperature in the low-temperature exhaust treatment strategy, determining whether the tail exhaust NOx value in the working state information is less than or equal to the NOx limit value in the low-temperature exhaust treatment strategy; 当所述工作状态信息中的尾排NOx值小于或等于所述NOx限值时，使用所述H2SCR对排气中的NOx进行还原处理，并使用所述SCR对经过所述H2SCR处理后的排气中的NOx进行处理；When the tail NOx value in the working state information is less than or equal to the NOx limit, the H 2 SCR is used to reduce the NOx in the exhaust gas, and the SCR is used to treat the NOx in the exhaust gas treated by the H 2 SCR; 当所述工作状态信息中的尾排NOx值大于所述NOx限值时，在待处理的排气流向所述H2SCR前，向排气补充氢气，使用所述H2SCR对补充氢气后的排气中的NOx进行处理，并使用所述SCR对经过所述H2SCR处理后的排气中的NOx进行处理。When the tail NOx value in the working state information is greater than the NOx limit, hydrogen is added to the exhaust gas before the exhaust gas to be treated flows to the H2SCR , the H2SCR is used to treat NOx in the exhaust gas after hydrogen supplementation, and the SCR is used to treat NOx in the exhaust gas after treatment by the H2SCR . 2.根据权利要求1所述的方法，其特征在于，所述向排气补充氢气，包括：2. The method according to claim 1, wherein the step of adding hydrogen to the exhaust gas comprises: 获取氢气补充参数；Obtain hydrogen replenishment parameters; 使用所述氢气补充参数确定氢气补充值，依据所述氢气补充值控制预设的喷氢器向排气喷射氢气的喷射量。The hydrogen replenishment parameter is used to determine a hydrogen replenishment value, and the injection amount of hydrogen injected into the exhaust by the preset hydrogen injector is controlled according to the hydrogen replenishment value. 3.根据权利要求1所述的方法，其特征在于，还包括：3. The method according to claim 1, further comprising: 当所述工作状态信息中的排气温度大于所述低温排气处理策略中的第二预设温度时，基于预设的散热策略，控制所述氢内燃机后处理装置中的散热装置对所述H2SCR进行散热处理，并使排气经过所述H2SCR处理后，再使用所述SCR对排气进行处理。When the exhaust temperature in the working state information is greater than a second preset temperature in the low-temperature exhaust treatment strategy, based on a preset heat dissipation strategy, the heat dissipation device in the hydrogen internal combustion engine aftertreatment device is controlled to perform heat dissipation treatment on the H2SCR , and the exhaust is processed by the H2SCR before being processed by the SCR. 4.根据权利要求3所述的方法，其特征在于，所述基于预设的散热策略，控制所述氢内燃机后处理装置中的散热装置对所述H2SCR进行散热处理，包括：4. The method according to claim 3, wherein the step of controlling the heat dissipation device in the hydrogen internal combustion engine aftertreatment device to perform heat dissipation treatment on the H2 SCR based on a preset heat dissipation strategy comprises: 控制所述散热装置中的风力调节器中的开度为百分百，使得用于散热的气体通过所述风力调节器后对所述H2SCR进行散热处理，并依据所述H2SCR的温度变化调节所述风力调节器的开度。The opening of the wind regulator in the heat dissipation device is controlled to be 100%, so that the heat dissipation gas passes through the wind regulator to dissipate heat for the H 2 SCR, and the opening of the wind regulator is adjusted according to the temperature change of the H 2 SCR. 5.根据权利要求1所述的方法，其特征在于，所述控制预设的尿素喷嘴喷射尿素，包括：5. The method according to claim 1, wherein controlling a preset urea nozzle to spray urea comprises: 获取尿素补充参数；Get urea supplement parameters; 使用所述尿素补充参数确定尿素喷射量，依据所述尿素喷射量控制所述尿素喷嘴喷射尿素。The urea replenishment parameter is used to determine a urea injection amount, and the urea nozzle is controlled to inject urea according to the urea injection amount.
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