CN113431664A - Engine tail gas treatment system - Google Patents
Engine tail gas treatment system Download PDFInfo
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- CN113431664A CN113431664A CN202110826767.XA CN202110826767A CN113431664A CN 113431664 A CN113431664 A CN 113431664A CN 202110826767 A CN202110826767 A CN 202110826767A CN 113431664 A CN113431664 A CN 113431664A
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- Prior art keywords
- sulfur dioxide
- engine
- ecu
- actual concentration
- accumulation
- Prior art date
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Links
- 238000011282 treatment Methods 0.000 title claims abstract description 32
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 164
- 238000002485 combustion reaction Methods 0.000 claims abstract description 24
- 238000009825 accumulation Methods 0.000 claims description 25
- 238000001228 spectrum Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 2
- 230000001186 cumulative effect Effects 0.000 claims 1
- 230000003321 amplification Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/027—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting SOx
-
- 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
- Y02T10/40—Engine management systems
Abstract
The invention discloses an engine tail gas treatment system, which relates to the technical field of tail gas treatment and solves the technical problem of high treatment cost of the tail gas of the existing engine, the system comprises an ECU (electronic control unit), an engine, a supercharger and a postprocessor which are sequentially connected through an exhaust pipe, and the ECU is in communication connection with the engine; the sulfur dioxide sensor acquires the actual concentration of sulfur dioxide in the exhaust pipe in real time and sends the actual concentration to the ECU; when the actual concentration reaches a first set value, the ECU controls the engine to operate according to a sulfur dioxide combustion strategy, so that the temperature of tail gas is increased, and sulfur dioxide accumulated in the processor is combusted and discharged.
Description
Technical Field
The invention relates to the technical field of tail gas treatment, in particular to an engine tail gas treatment system.
Background
The post-processor for treating the engine tail gas contains noble metal, such as rhodium, and the noble metal has high price (reaching 5000-. The standard diesel oil contains a small amount of sulfur dioxide in the engine exhaust after combustion, but if the standard-nonconforming diesel oil is used, the engine exhaust contains a large amount of sulfur dioxide, the sulfur dioxide is easy to cause poisoning of an after-treatment device after being accumulated in the after-treatment device, the after-treatment device can be scrapped when the sulfur dioxide is serious, the working performance of the engine can be seriously influenced, and the use cost of the after-treatment device is greatly increased.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and aims to provide an engine exhaust treatment system capable of treating sulfur dioxide accumulation.
The technical scheme of the invention is as follows: an engine tail gas treatment system comprises an ECU, an engine, a supercharger and a postprocessor which are sequentially connected through an exhaust pipe, wherein the ECU is in communication connection with the engine, and a sulfur dioxide sensor which is in communication connection with the ECU is arranged on the exhaust pipe between the supercharger and the postprocessor;
the sulfur dioxide sensor acquires the actual concentration of sulfur dioxide in the exhaust pipe in real time and sends the actual concentration to the ECU;
and when the actual concentration reaches a first set value, the ECU controls the engine to operate according to a sulfur dioxide combustion strategy, so that the temperature of tail gas is increased, and sulfur dioxide accumulated in the processor is combusted and discharged.
As a further improvement, the sulfur dioxide combustion strategy is specifically:
when the actual concentration reaches a first set value, the ECU inquires a sulfur dioxide accumulation pulse spectrum according to the actual concentration and the duration of the actual concentration to obtain a real-time accumulation amount, accumulates the real-time accumulation amount into an accumulation total amount, and adds the duration into the total duration;
when the accumulated total amount reaches a second set value or the total duration reaches a third set value, inquiring a sulfur dioxide combustion pulse spectrum according to the accumulated total amount and the total duration to obtain combustion parameters;
controlling the engine to operate according to the combustion parameters to perform sulfur dioxide treatment operation; and after the sulfur dioxide treatment operation is finished, resetting the accumulated total amount and the total duration time, and restarting accumulation.
Further, after the accumulated total amount and the total duration are cleared each time, the total processing frequency of sulfur dioxide is accumulated to 1, and when the total processing frequency of sulfur dioxide reaches a set value, the ECU reminds a user to detect the residual amount of sulfur dioxide in the post-processor.
Further, when the actual concentration reaches a fourth set value and lasts for a set time, the ECU sends out an alarm signal for reminding a user to check the oil product.
Further, the sulfur dioxide accumulation pulse spectrum is obtained by calibrating according to the concentration of sulfur dioxide and the duration of the concentration of sulfur dioxide in a bench test; the sulfur dioxide combustion pulse spectrum is obtained by calibrating in a bench test according to the sulfur dioxide accumulation amount and the continuous accumulation time.
Furthermore, when the sulfur dioxide treatment operation is carried out, the temperature of the tail gas is 600-700 ℃, and the operation time is not less than 5 min.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
install the sulfur dioxide sensor in front of the post processor additional, the sulfur dioxide sensor detects that the concentration of sulfur dioxide reaches the setting value, ECU controls the combustion strategy of engine according to sulfur dioxide combustion strategy, make the temperature of tail gas increase, thereby burn and discharge the sulfur dioxide that accumulates in the post processor, send corresponding warning simultaneously and improve user's inspection oil, can prevent that sulfur dioxide from accumulating in the post processor and causing the post processor to be poisoned, the life of post processor has been improved, thereby the use cost of post processor has been reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: 1-exhaust pipe, 2-engine, 3-supercharger, 4-postprocessor and 5-sulfur dioxide sensor.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1, an engine tail gas treatment system comprises an ECU, an engine 2, a supercharger 3 and a postprocessor 4 which are sequentially connected through an exhaust pipe 1, wherein the ECU is in communication connection with the engine 2, and a sulfur dioxide sensor 5 in communication connection with the ECU is arranged on the exhaust pipe 1 between the supercharger 3 and the postprocessor 4;
the sulfur dioxide sensor 5 acquires the actual concentration of sulfur dioxide in the exhaust pipe 1 in real time and sends the actual concentration to the ECU;
when the actual concentration reaches the first set value, the ECU controls the engine 2 to operate according to a sulfur dioxide combustion strategy, so that the temperature of the tail gas is increased, and the sulfur dioxide accumulated in the post-processor 4 is combusted and discharged.
The sulfur dioxide combustion strategy is specifically as follows:
when the actual concentration reaches a first set value, the ECU inquires a sulfur dioxide accumulation pulse spectrum according to the actual concentration and the duration of the actual concentration to obtain a real-time accumulation amount, accumulates the real-time accumulation amount into an accumulation total amount, and adds the duration into the total duration;
when the accumulated total amount reaches a second set value or the total duration reaches a third set value, inquiring a sulfur dioxide combustion pulse spectrum according to the accumulated total amount and the total duration to obtain combustion parameters;
controlling the engine 2 to operate according to the combustion parameters to perform sulfur dioxide treatment operation so as to treat the accumulated sulfur dioxide in time; and after the sulfur dioxide treatment operation is finished, resetting the accumulated total amount and the total duration time, and restarting accumulation.
The ECU performs filtering processing after receiving the actual concentration, specifically, performs mean filtering processing on a plurality of continuously collected actual concentrations to obtain a smooth value, subtracts an absolute value of the smooth value from the actual concentration, multiplies the absolute value by 100 to obtain an amplification value, and if the amplification value is larger than a set range, indicates that the current actual concentration is a noise or a mutation value, the current actual concentration is invalid, and abandons continuous reading of the next actual concentration; otherwise, the current actual concentration is effective, the actual concentration is multiplied by 100 to obtain an integer, and then the integer is compared with the first set value, so that calculation and comparison are facilitated.
After accumulating total amount, total duration zero clearing each time, sulfur dioxide total processing times adds up 1, and when sulfur dioxide total processing times reached the set value, ECU reminded the user to carry out sulfur dioxide residual amount detection to post processor 4, prevented that the remaining sulfur dioxide of many times sulfur dioxide processing operation from accumulating too much and causing post processor poisoning.
And when the actual concentration reaches the fourth set value and lasts for a set time, the ECU sends out an alarm signal for reminding a user to check the oil product. When the actual concentration is too high, the oil product may be unqualified, and the engine damage may be caused by continuous use.
The sulfur dioxide accumulation pulse spectrum is obtained by calibrating in a bench test according to the concentration of sulfur dioxide and the duration of the concentration of sulfur dioxide; the sulfur dioxide combustion pulse spectrum is obtained by calibrating in a bench test according to the sulfur dioxide accumulation amount and the continuous accumulation time.
When the sulfur dioxide treatment operation is carried out, the temperature of the tail gas is 600-700 ℃, the operation time is not less than 5min, and the sulfur dioxide accumulated in the post-processor can be effectively combusted and discharged. But the operation time is not suitable to be too long so as to avoid the occurrence of cylinder burning.
Install the sulfur dioxide sensor in front of the post processor additional, the sulfur dioxide sensor detects that the concentration of sulfur dioxide reaches the setting value, ECU controls the combustion strategy of engine according to sulfur dioxide combustion strategy, make the temperature of tail gas increase, thereby burn and discharge the sulfur dioxide that accumulates in the post processor, send corresponding warning simultaneously and improve user's inspection oil, can prevent that sulfur dioxide from accumulating in the post processor and causing the post processor to be poisoned, the life of post processor has been improved, thereby the use cost of post processor has been reduced.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (6)
1. An engine tail gas treatment system comprises an ECU, an engine (2), a supercharger (3) and a postprocessor (4) which are sequentially connected through an exhaust pipe (1), wherein the ECU is in communication connection with the engine (2), and the engine tail gas treatment system is characterized in that a sulfur dioxide sensor (5) which is in communication connection with the ECU is arranged on the exhaust pipe (1) between the supercharger (3) and the postprocessor (4);
the sulfur dioxide sensor (5) acquires the actual concentration of sulfur dioxide in the exhaust pipe (1) in real time and sends the actual concentration to the ECU;
and when the actual concentration reaches a first set value, the ECU controls the engine (2) to operate according to a sulfur dioxide combustion strategy, so that the temperature of tail gas is increased, and sulfur dioxide accumulated in the postprocessor (4) is combusted and discharged.
2. The engine exhaust gas treatment system according to claim 1,
the sulfur dioxide combustion strategy specifically comprises:
when the actual concentration reaches a first set value, the ECU inquires a sulfur dioxide accumulation pulse spectrum according to the actual concentration and the duration of the actual concentration to obtain a real-time accumulation amount, accumulates the real-time accumulation amount into an accumulation total amount, and adds the duration into the total duration;
when the accumulated total amount reaches a second set value or the total duration reaches a third set value, inquiring a sulfur dioxide combustion pulse spectrum according to the accumulated total amount and the total duration to obtain combustion parameters;
controlling the engine (2) to operate according to the combustion parameters to perform sulfur dioxide treatment operation; and after the sulfur dioxide treatment operation is finished, resetting the accumulated total amount and the total duration time, and restarting accumulation.
3. The engine exhaust gas treatment system according to claim 2, wherein the total number of sulfur dioxide treatments is accumulated to 1 after the cumulative total amount and the total duration are cleared each time, and when the total number of sulfur dioxide treatments reaches a set value, the ECU prompts a user to perform sulfur dioxide residue detection on the post-processor (4).
4. The engine exhaust treatment system according to claim 2, wherein the ECU sends an alarm signal to remind a user to check the oil product when the actual concentration reaches a fourth set value for a set time.
5. The engine exhaust treatment system of claim 2, wherein the sulfur dioxide accumulation pulse spectrum is calibrated in a bench test based on the concentration of sulfur dioxide and the duration of the concentration of sulfur dioxide; the sulfur dioxide combustion pulse spectrum is obtained by calibrating in a bench test according to the sulfur dioxide accumulation amount and the continuous accumulation time.
6. The engine exhaust gas treatment system according to claim 2, wherein the temperature of the exhaust gas is 600 ℃ to 700 ℃ and the operation time is not less than 5min when the sulfur dioxide treatment operation is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110826767.XA CN113431664A (en) | 2021-07-21 | 2021-07-21 | Engine tail gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110826767.XA CN113431664A (en) | 2021-07-21 | 2021-07-21 | Engine tail gas treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN113431664A true CN113431664A (en) | 2021-09-24 |
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| CN202110826767.XA Pending CN113431664A (en) | 2021-07-21 | 2021-07-21 | Engine tail gas treatment system |
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2021
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Inventor after: Pang Bangshun Inventor after: Liang Baoquan Inventor after: An Liqiang Inventor after: Wang Lei Inventor after: Luo Yujun Inventor before: Liang Baoquan Inventor before: An Liqiang Inventor before: Wang Lei Inventor before: Luo Yujun |
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Application publication date: 20210924 |