CN111140319B - Desulfurization control method and device, storage medium and electronic equipment - Google Patents

Desulfurization control method and device, storage medium and electronic equipment Download PDF

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CN111140319B
CN111140319B CN201911415670.9A CN201911415670A CN111140319B CN 111140319 B CN111140319 B CN 111140319B CN 201911415670 A CN201911415670 A CN 201911415670A CN 111140319 B CN111140319 B CN 111140319B
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content
scr
regeneration
preset value
determining
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CN111140319A (en
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王毓源
王金平
仝玉华
滑文山
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • 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 ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/04—Sulfur or sulfur oxides
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

The embodiment of the invention provides a desulfurization control method, a desulfurization control device, a storage medium and electronic equipment. And then judging whether the content of the sulfide salt is greater than a first preset value or not, if so, executing a desulfurization action, if not, judging whether the content of the sulfide salt is greater than a second preset value or not, if so, acquiring the regeneration state of the DPF, and if the regeneration state is regeneration, controlling the regeneration time to be a third preset value, wherein the first preset value is greater than the second preset value, and the third preset value is greater than the control time length during normal regeneration. Therefore, the scheme can execute the desulfurization action when the content of the sulfide salt is greater than the first preset value, and prolong the regeneration time when the content of the sulfide salt is less than the first preset value and greater than the second preset value, so that the accumulative degree of sulfur can be judged in advance, and the effect of desulfurization in advance is achieved.

Description

Desulfurization control method and device, storage medium and electronic equipment
Technical Field
The invention relates to the technical field of data processing, in particular to a desulfurization control method, a desulfurization control device, a desulfurization control storage medium and electronic equipment.
Background
When the diesel oil is combusted in a cylinder, a part of sulfur reacts to become sulfur oxide (SO2 and SO3) and sulfide salt enters an after-treatment system along with tail gas, wherein the sulfide salt can be attached to the surface of an SCR (selective catalytic reduction) catalyst, SO that the contact and attachment reaction of NOx and the catalyst are influenced, the SCR efficiency is further influenced, a large amount of NOx is discharged without reaction, and the emission is influenced. Therefore, it is necessary to remove sulfur adhering to the SCR catalyst by regeneration (increase in exhaust temperature) combustion (desulfurization).
The mode of carrying out the desulfurization according to SCR efficiency reduction alone is adopted at present, go through stopping spouting the condition that the urea got rid of ammonia leakage and then judge whether there is sulfur poisoning again when SCR efficiency reduces promptly, and this kind of mode just can carry out the desulfurization when sulfur poisoning has seriously influenced SCR efficiency for the relatively poor stability that influences emission effect in desulfurization opportunity just causes the wearing and tearing of time, fuel and acceleration part.
Therefore, how to provide a desulfurization control method, which can determine the accumulated degree of sulfur in advance to achieve the effect of desulfurization in advance, is a great technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, embodiments of the present invention provide a desulfurization control method, which can determine the cumulative degree of sulfur in advance, so as to achieve the effect of desulfurization in advance.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a desulfurization control method comprising:
obtaining the content of sulfide salt in SCR under all working conditions;
judging whether the content of the sulfide salt is greater than a first preset value, if so, executing a desulfurization action, and if not, judging whether the content of the sulfide salt is greater than a second preset value;
if the regeneration state is the regeneration state, the regeneration time is controlled to be a third preset value, the first preset value is larger than the second preset value, and the third preset value is larger than the control time length during normal regeneration.
Optionally, the obtaining the content of sulfide salt in the SCR under all operating conditions includes:
determining the content of sulfur currently accumulated by the SCR based on the sulfur content percentage in the diesel oil, the oil injection quantity of the current working condition and the rotating speed;
determining the content of sulfide consumed by one-time regeneration based on the exhaust temperature and the oxygen content in the tail gas;
and determining the difference value of the content of the sulfur currently accumulated by the SCR and the content of the sulfide consumed by the primary regeneration as the content of the sulfide salt in the SCR under the full working condition.
Optionally, the obtaining the content of sulfide salt in the SCR under all operating conditions includes:
determining the total mass of sulfides currently accumulated by the SCR based on the sulfur content percentage in the diesel, the fuel injection quantity and the rotating speed under the current working condition;
based on the exhaust temperature and the oxygen content in the tail gas, checking a preset MAP table to determine the content of sulfide reduced in unit time;
determining a difference between the total mass of sulfides currently accumulated by the SCR and the reduced sulfide content per unit time;
and determining the integral of the difference value as the content of the sulfide salt in the SCR under the full working condition.
Optionally, the method further includes:
acquiring the change rate of the SCR reaction efficiency under the stable working condition;
and correcting the preset MAP based on the change rate of the SCR reaction efficiency.
A desulfurization control apparatus comprising:
the first acquisition module is used for acquiring the content of sulfide salt in the SCR under all working conditions;
the judgment module is used for judging whether the content of the sulfide salt is greater than a first preset value or not, if so, executing a desulfurization action, and if not, judging whether the content of the sulfide salt is greater than a second preset value or not;
and the control module is used for acquiring the regeneration state of the DPF if the regeneration state is the regeneration state, controlling the regeneration time to be a third preset value if the regeneration state is the regeneration state, wherein the first preset value is larger than the second preset value, and the third preset value is larger than the control time length during normal regeneration.
Optionally, the obtaining module includes:
the first determination unit is used for determining the content of sulfur currently accumulated by the SCR based on the sulfur content percentage in the diesel oil, the oil injection quantity and the rotating speed under the current working condition;
a second determination unit for determining the content of sulfide consumed in one regeneration based on the exhaust temperature and the oxygen content in the exhaust gas;
and the third determining unit is used for determining that the difference value between the content of the sulfur currently accumulated by the SCR and the content of the sulfide consumed by the primary regeneration is the content of the sulfide salt in the SCR under the full working condition.
Optionally, the obtaining module further includes:
the fourth determining unit is used for determining the total mass of the sulfides currently accumulated by the SCR based on the sulfur content percentage in the diesel, the fuel injection quantity of the current working condition and the rotating speed;
a fifth determining unit for determining the content of sulfides reduced per unit time by referring to a preset MAP table based on the exhaust temperature and the oxygen content in the exhaust gas;
a sixth determining unit, configured to determine a difference between the total mass of sulfides currently accumulated in the SCR and the content of sulfides decreased per unit time;
and the seventh determining unit is used for determining the integral of the difference value as the content of the sulfide salt in the SCR under the full working condition.
Optionally, the method further includes:
the second acquisition module is used for acquiring the change rate of the SCR reaction efficiency under the stable working condition;
and the correcting module is used for correcting the preset MAP based on the change rate of the SCR reaction efficiency.
A storage medium comprising a stored program, wherein the apparatus on which the storage medium is located is controlled to execute any one of the above-described desulfurization control methods when the program is executed.
An electronic device comprising at least one processor, and at least one memory, bus connected to the processor; the processor and the memory complete mutual communication through the bus; the processor is configured to call the program instructions in the memory to perform any one of the above-described desulfurization control methods.
Based on the technical scheme, the embodiment of the invention provides a desulfurization control method, a desulfurization control device, a storage medium and electronic equipment. And then judging whether the content of the sulfide salt is greater than a first preset value or not, if so, executing a desulfurization action, if not, judging whether the content of the sulfide salt is greater than a second preset value or not, if so, acquiring the regeneration state of the DPF, and if the regeneration state is regeneration, controlling the regeneration time to be a third preset value, wherein the first preset value is greater than the second preset value, and the third preset value is greater than the control time length during normal regeneration. Therefore, the scheme can execute the desulfurization action when the content of the sulfide salt is greater than the first preset value, and prolong the regeneration time when the content of the sulfide salt is less than the first preset value and greater than the second preset value, so that the accumulative degree of sulfur can be judged in advance, and the effect of desulfurization in advance is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart of a desulfurization control method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a desulfurization control method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of processing logic according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a desulfurization control method according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of yet another processing logic provided in accordance with an embodiment of the invention;
FIG. 6 is a schematic flow chart of a desulfurization control method according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a desulfurization control apparatus according to an embodiment of the present invention;
fig. 8 is a hardware architecture diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic flow chart of a desulfurization control method according to an embodiment of the present invention, the method including:
s11, acquiring the content of sulfide salt in the SCR under all working conditions;
s12, judging whether the content of the sulfide salt is larger than a first preset value or not, if so, executing a desulfurization action, and if not, judging whether the content of the sulfide salt is larger than a second preset value or not;
and S13, if so, acquiring the regeneration state of the DPF, and if the regeneration state is regeneration, controlling the regeneration time to be a third preset value.
The first preset value is larger than the second preset value, and the third preset value is larger than the control time length during normal regeneration.
Therefore, in the embodiment, after the sulfide content in the SCR under all the working conditions is obtained, the judgment can be performed according to the sulfide content in the SCR. When the calculated sulfur content in the SCR is accumulated to a certain value (smaller), the regeneration time is prolonged for the next DPF regeneration to achieve the aim of desulfurization, and when the sulfur content in the SCR is too high and regeneration is not carried out for a long time, the DPF regeneration for a long time is forced to be carried out so as to desulfurize. Therefore, the planned prolongation of the regeneration time of the DPF at a certain time or the planned forced desulfurization is realized, and the effect of desulfurization in advance is achieved.
Specifically, the embodiment of the present invention provides two specific implementation manners for obtaining the content of sulfide in the SCR under all operating conditions, which are as follows:
the first method, as shown in fig. 2, includes the steps of:
s21, determining the content of sulfur currently accumulated by the SCR based on the percentage of sulfur content in diesel oil, the fuel injection quantity and the rotating speed under the current working condition;
s22, determining the content of sulfide consumed in the primary regeneration based on the exhaust temperature and the oxygen content in the tail gas;
s23, determining the difference between the current sulfur content of the SCR and the sulfide content consumed in the primary regeneration as the sulfide salt content in the SCR under the full working condition.
Schematically, the first embodiment will be described with reference to fig. 3, as follows:
the total mass of sulfide salt and sulfur oxide generated in tail gas in unit time can be calculated according to the sulfur content percentage in diesel oil (self-adaptive according to SCR efficiency descending trend) multiplied by the fuel quantity burnt in unit time obtained by converting the fuel injection quantity and the rotating speed of the current working condition:
Δsout＝η×(q÷(120÷n))
in the formula: the sulfur content ratio in eta diesel oil, q is the fuel injection quantity of the current working condition, and n is the rotating speed. And obtaining the sulfur accumulated in the current SCR according to time integration.
sout＝∫Δsout
Because a part of sulfur accumulated in SCR can be burned off in each DPF regeneration, the amount of sulfur reacted in the regeneration unit time can be obtained by looking up a table according to the exhaust temperature and the oxygen content in the tail gas measured by the NOx sensor in each DPF regeneration, and the amount of the sulfide salt reacted in the regeneration can be obtained by multiplying the regeneration duration by the amount of the sulfur reacted in the regeneration. The mass of this portion of reacted sulfur is subtracted at the end of each regeneration to yield the change in sulfur content in the SCR over the course of engine operation.
S＝sout-sdpf
The second method, as shown in fig. 4, includes the steps of:
s41, determining the total mass of sulfide currently accumulated by the SCR based on the sulfur content percentage in the diesel oil, the oil injection quantity and the rotating speed under the current working condition;
s42, checking a preset MAP table based on the exhaust temperature and the oxygen content in the exhaust gas, and determining the content of the sulfide reduced in unit time;
s43, determining the difference value between the total mass of the sulfides currently accumulated in the SCR and the content of the sulfides reduced in the unit time;
and S44, determining the integral of the difference value as the content of the sulfide salt in the SCR under the full working condition.
Schematically, the first embodiment will be described with reference to fig. 5 as follows:
and (2) calculating the total increase of sulfide salt and sulfur oxide generated in the tail gas in unit time according to the sulfur content percentage in the diesel (self-adaptive according to the SCR efficiency descending trend) multiplied by the fuel quantity burnt in unit time obtained by converting the fuel injection quantity and the rotating speed under the current working condition (the part is the same as the method I):
Δsout＝η×(q÷(120÷n))
during regeneration, the second method checks the MAP according to the real-time exhaust temperature during regeneration and the oxygen content in the tail gas to obtain the mass of the sulfide salt reduced (reacted) in unit time, and when regeneration is not carried out, the mass is 0.
The mass of the sulfide salt generated by combustion of the fuel in unit time is subtracted by the mass of the sulfide salt reduced in unit time during regeneration, so that the variation of the sulfide salt in unit time under all working conditions is obtained:
ΔS＝Δsout-Δsdpf
and (3) obtaining the SCR sulfur content which changes in real time under the whole working condition according to the time integral on the variable quantity delta S of the sulfide salt in the unit time under the whole working condition:
S＝∫ΔS
on the basis of the foregoing embodiment, an embodiment of the present invention provides a desulfurization control method, as shown in fig. 6, which may further include:
s61, acquiring the change rate of the SCR reaction efficiency under the stable working condition;
and S62, correcting the preset MAP based on the change rate of the SCR reaction efficiency.
That is, the present system monitors the change in the SCR reaction efficiency and detects the rate of change in the SCR reaction efficiency when the operating conditions are stable (no regeneration or the like, no ammonia slip). According to the reduction rate of the SCR reaction efficiency in a specific time, the sulfur content in the diesel oil is corrected by looking up a table, so that the influence of different oil products on the calculation of the SCR sulfur content is eliminated, and the self-adaptive effect is achieved. Meanwhile, the quality of diesel used by a driver can be monitored, and when the driver frequently uses poor diesel with high sulfur content, relevant parameters are corrected so as to avoid damaging the catalyst too fast.
On the basis of the above embodiment, as shown in fig. 7, the present embodiment also provides a desulfurization control apparatus including:
the first obtaining module 71 is used for obtaining the content of sulfide salt in the SCR under all working conditions;
a judging module 72, configured to judge whether the content of the sulfide salt is greater than a first preset value, if so, perform a desulfurization action, and if not, judge whether the content of the sulfide salt is greater than a second preset value;
and the control module 73 is configured to, if the regeneration status is yes, acquire a regeneration status of the DPF, and if the regeneration status is regeneration, control the regeneration time to be a third preset value, where the first preset value is greater than the second preset value, and the third preset value is greater than a control time length during normal regeneration.
Wherein the obtaining module may include:
the first determination unit is used for determining the content of sulfur currently accumulated by the SCR based on the sulfur content percentage in the diesel oil, the oil injection quantity and the rotating speed under the current working condition;
a second determination unit for determining the content of sulfide consumed in one regeneration based on the exhaust temperature and the oxygen content in the exhaust gas;
and the third determining unit is used for determining that the difference value between the content of the sulfur currently accumulated by the SCR and the content of the sulfide consumed by the primary regeneration is the content of the sulfide salt in the SCR under the full working condition.
In addition, the obtaining module may further include:
the fourth determining unit is used for determining the total mass of the sulfides currently accumulated by the SCR based on the sulfur content percentage in the diesel, the fuel injection quantity of the current working condition and the rotating speed;
a fifth determining unit for determining the content of sulfides reduced per unit time by referring to a preset MAP table based on the exhaust temperature and the oxygen content in the exhaust gas;
a sixth determining unit, configured to determine a difference between the total mass of sulfides currently accumulated in the SCR and the content of sulfides decreased per unit time;
and the seventh determining unit is used for determining the integral of the difference value as the content of the sulfide salt in the SCR under the full working condition.
In addition, the desulfurization control apparatus provided in the embodiment of the present invention may further include:
the second acquisition module is used for acquiring the change rate of the SCR reaction efficiency under the stable working condition;
and the correcting module is used for correcting the preset MAP based on the change rate of the SCR reaction efficiency.
The desulfurization control device comprises a processor and a memory, wherein the first acquisition module, the judgment module and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one inner core can be set, and the accumulative degree of sulfur is judged in advance by adjusting the inner core parameters, so that the effect of desulfurization in advance is achieved.
An embodiment of the present invention provides a storage medium having a program stored thereon, the program implementing the desulfurization control method when executed by a processor.
The embodiment of the invention provides a processor, which is used for running a program, wherein the desulfurization control method is executed when the program runs.
An embodiment of the present invention provides an apparatus, as shown in fig. 8, the apparatus includes at least one processor 81, and at least one memory 82 and a bus 83 connected to the processor; the processor and the memory complete mutual communication through a bus; the processor is used for calling the program instructions in the memory so as to execute the desulfurization control method. The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device:
obtaining the content of sulfide salt in SCR under all working conditions;
judging whether the content of the sulfide salt is greater than a first preset value, if so, executing a desulfurization action, and if not, judging whether the content of the sulfide salt is greater than a second preset value;
if the regeneration state is the regeneration state, the regeneration time is controlled to be a third preset value, the first preset value is larger than the second preset value, and the third preset value is larger than the control time length during normal regeneration.
Optionally, the obtaining the content of sulfide salt in the SCR under all operating conditions includes:
determining the content of sulfur currently accumulated by the SCR based on the sulfur content percentage in the diesel oil, the oil injection quantity of the current working condition and the rotating speed;
determining the content of sulfide consumed by one-time regeneration based on the exhaust temperature and the oxygen content in the tail gas;
and determining the difference value of the content of the sulfur currently accumulated by the SCR and the content of the sulfide consumed by the primary regeneration as the content of the sulfide salt in the SCR under the full working condition.
Optionally, the obtaining the content of sulfide salt in the SCR under all operating conditions includes:
determining the total mass of sulfides currently accumulated by the SCR based on the sulfur content percentage in the diesel, the fuel injection quantity and the rotating speed under the current working condition;
based on the exhaust temperature and the oxygen content in the tail gas, checking a preset MAP table to determine the content of sulfide reduced in unit time;
determining a difference between the total mass of sulfides currently accumulated by the SCR and the reduced sulfide content per unit time;
and determining the integral of the difference value as the content of the sulfide salt in the SCR under the full working condition.
Optionally, the method further includes:
acquiring the change rate of the SCR reaction efficiency under the stable working condition;
and correcting the preset MAP based on the change rate of the SCR reaction efficiency.
In summary, the embodiment of the invention provides a desulfurization control method, a desulfurization control device, a storage medium and electronic equipment. And then judging whether the content of the sulfide salt is greater than a first preset value or not, if so, executing a desulfurization action, if not, judging whether the content of the sulfide salt is greater than a second preset value or not, if so, acquiring the regeneration state of the DPF, and if the regeneration state is regeneration, controlling the regeneration time to be a third preset value, wherein the first preset value is greater than the second preset value, and the third preset value is greater than the control time length during normal regeneration. Therefore, the scheme can execute the desulfurization action when the content of the sulfide salt is greater than the first preset value, and prolong the regeneration time when the content of the sulfide salt is less than the first preset value and greater than the second preset value, so that the accumulative degree of sulfur can be judged in advance, and the effect of desulfurization in advance is achieved.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a device includes one or more processors (CPUs), memory, and a bus. The device may also include input/output interfaces, network interfaces, and the like.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip. The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that 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 an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (8)

1. A desulfurization control method characterized by comprising:
obtaining the content of sulfide salt in the SCR under all conditions, wherein the obtaining of the content of sulfide salt in the SCR under all conditions comprises:
determining the total mass of sulfides currently accumulated by the SCR based on the sulfur content percentage in the diesel, the fuel injection quantity and the rotating speed under the current working condition;
based on the exhaust temperature and the oxygen content in the tail gas, checking a preset MAP table to determine the content of sulfide reduced in unit time;
determining a difference between the total mass of sulfides currently accumulated by the SCR and the reduced sulfide content per unit time;
determining the integral of the difference value as the content of sulfide salt in the SCR under the full working condition;
judging whether the content of the sulfide salt is greater than a first preset value, if so, executing a desulfurization action, and if not, judging whether the content of the sulfide salt is greater than a second preset value;
if the regeneration state is the regeneration state, the regeneration time is controlled to be a third preset value, the first preset value is larger than the second preset value, and the third preset value is larger than the control time length during normal regeneration.
2. The desulfurization control method according to claim 1, wherein the obtaining of the sulfide salt content in the SCR under all operating conditions further comprises:
determining the content of sulfur currently accumulated by the SCR based on the sulfur content percentage in the diesel oil, the oil injection quantity of the current working condition and the rotating speed;
determining the content of sulfide consumed by one-time regeneration based on the exhaust temperature and the oxygen content in the tail gas;
and determining the difference value of the content of the sulfur currently accumulated by the SCR and the content of the sulfide consumed by the primary regeneration as the content of the sulfide salt in the SCR under the full working condition.
3. The desulfurization control method according to claim 1, characterized by further comprising:
acquiring the change rate of the SCR reaction efficiency under the stable working condition;
and correcting the preset MAP based on the change rate of the SCR reaction efficiency.
4. A desulfurization control apparatus, characterized by comprising:
the first acquisition module is used for acquiring the content of sulfide salt in the SCR under all working conditions, and the acquisition module further comprises:
the fourth determining unit is used for determining the total mass of the sulfides currently accumulated by the SCR based on the sulfur content percentage in the diesel, the fuel injection quantity of the current working condition and the rotating speed;
a fifth determining unit for determining the content of sulfides reduced per unit time by referring to a preset MAP table based on the exhaust temperature and the oxygen content in the exhaust gas;
a sixth determining unit, configured to determine a difference between the total mass of sulfides currently accumulated in the SCR and the content of sulfides decreased per unit time;
a seventh determining unit, configured to determine that an integral of the difference is a content of sulfide salt in the SCR under the full operating condition;
the judgment module is used for judging whether the content of the sulfide salt is greater than a first preset value or not, if so, executing a desulfurization action, and if not, judging whether the content of the sulfide salt is greater than a second preset value or not;
and the control module is used for acquiring the regeneration state of the DPF if the regeneration state is the regeneration state, controlling the regeneration time to be a third preset value if the regeneration state is the regeneration state, wherein the first preset value is larger than the second preset value, and the third preset value is larger than the control time length during normal regeneration.
5. The desulfurization control apparatus according to claim 4, wherein the acquisition module further includes:
the first determination unit is used for determining the content of sulfur currently accumulated by the SCR based on the sulfur content percentage in the diesel oil, the oil injection quantity and the rotating speed under the current working condition;
a second determination unit for determining the content of sulfide consumed in one regeneration based on the exhaust temperature and the oxygen content in the exhaust gas;
and the third determining unit is used for determining that the difference value between the content of the sulfur currently accumulated by the SCR and the content of the sulfide consumed by the primary regeneration is the content of the sulfide salt in the SCR under the full working condition.
6. The desulfurization control apparatus according to claim 4, characterized by further comprising:
the second acquisition module is used for acquiring the change rate of the SCR reaction efficiency under the stable working condition;
and the correcting module is used for correcting the preset MAP based on the change rate of the SCR reaction efficiency.
7. A storage medium characterized by comprising a stored program, wherein an apparatus in which the storage medium is located is controlled to execute the desulfurization control method according to any one of claims 1 to 3 when the program is executed.
8. An electronic device comprising at least one processor, and at least one memory, bus connected to the processor; the processor and the memory complete mutual communication through the bus; the processor is configured to call program instructions in the memory to perform the desulfurization control method of any one of claims 1 to 3.
CN201911415670.9A 2019-12-31 2019-12-31 Desulfurization control method and device, storage medium and electronic equipment Active CN111140319B (en)

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