CN103452624B - For the exhaust gas purification system of high-power diesel engine - Google Patents
For the exhaust gas purification system of high-power diesel engine Download PDFInfo
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- CN103452624B CN103452624B CN201310439634.2A CN201310439634A CN103452624B CN 103452624 B CN103452624 B CN 103452624B CN 201310439634 A CN201310439634 A CN 201310439634A CN 103452624 B CN103452624 B CN 103452624B
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- 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
A kind of exhaust gas purification system for high-power diesel engine, comprise electric control cubicle, tail gas burner, exhaust gas cleaner and control circuit, exhaust gas cleaner comprises exhaust duct, purified solution container, vacuum pump and multiple nozzle, purified solution container is provided with purification material entrance, filling opening and purified solution outlet, the inlet side that purified solution exports the vacuum pump be connected with control circuit is communicated with, the end that goes out of vacuum pump is communicated with nozzle respectively, nozzle is corresponding with exhaust passage, the suction port of tail gas burner is communicated with the relief opening of diesel engine on boats and ships, air outlet is communicated with exhaust duct suction port, tail gas burner is controlled by control circuit.The present invention passes through the burning process of tail gas and the spray catalytic treatment of purified solution, tail gas is made to reach teirIII emission standard, avoid using rare metal as catalyzer, save resource, reduce operating cost, it can also according to the corresponding purified solution of oxynitride concentration automatic preparation in the tail gas of discharge.
Description
Technical field
The present invention relates to a kind of exhaust gas purification system, particularly a kind of exhaust gas purification system of diesel engine.
Background technique
The precondition that boat diesel engine forms nitrogen oxide is in combustion nitrogen and oxygen, and they form 99% of diesel engine suction air together.Oxygen will be consumed in combustion, the quantity of unnecessary oxygen is the function of air/fuel ratio, diesel engine operates in the case, nitrogen does not react in combustion mostly, but there is a very little part by the nitrogen oxide of oxidized formation various ways, the nitrogen oxide (NOx) that can be formed comprises nitrous oxide (NO) and nitrogen dioxide (NO2), the function of its total amount mainly flame or combustion temperature, and be present in the function of organic nitrogen in fuel (if existence) quantity, the formation of nitrogen oxide NOx or nitrogen and unnecessary oxygen expose the function of at high temperature time in diesel engine combustion.In other words, combustion temperature higher (as high peak pressure, high compression ratio, high fuel feeding ratio etc.), the nitrogen oxide NOx total amount formed is larger.The nitrogen oxide NOx amount that usual low-speed diesel engine is formed is larger than high speed machine, and NOx can cause environmental acidification, and form Tropospheric ozone, the harmful effects such as nutrition accumulation, work the mischief to global human health.Therefore, purified treatment need be carried out to the tail gas after diesel combustion, make emission compliance.
Light duty diesel engine on existing ship due to installing space narrow and small, the precious metals such as rare metal platinum (Pt), palladium (Pd), rhodium (Rh) generally can only be used as catalyzer when carrying out tail gas clean-up process, its operating cost is high.If the tail gas clean-up process of large-scale diesel engine uses rare metal as tai-gas clean-up catalyst on boats and ships, the power due to large-scale diesel engine is several times to tens times of small diesel engine, and consumption is large, manufacture cost is high, is unfavorable for economical operation.
Summary of the invention
Object of the present invention is just to provide a kind of compact structure, the easy to operate exhaust gas purification system for high-power diesel engine, it passes through the burning process of tail gas and the spray catalytic treatment of purified solution, to the soot particle in diesel emission tail gas, oxynitrides and hydrocarbon etc., there is significant removal effect, tail gas is made to reach teirIII emission standard, avoid using rare metal as catalyzer, save resource, reduce operating cost.
The object of the invention is by such technological scheme realize, it includes electric control cubicle, tail gas burner and exhaust gas cleaner, electric control cubicle is provided with control circuit, exhaust gas cleaner comprises exhaust duct, purified solution container, first vacuum pump and nozzle, wherein, purified solution container is provided with purification material entrance, filling opening and purified solution outlet, purified solution outlet is communicated with by the inlet side of pipeline with the first vacuum pump, first vacuum pump is connected with control circuit by circuit, the end that goes out of the first vacuum pump is communicated with nozzle by pipeline, nozzle is multiple, corresponding with the exhaust passage in exhaust duct on the ring wall that nozzle is arranged on exhaust duct respectively, the suction port of tail gas burner is communicated with the relief opening of diesel engine on boats and ships, the air outlet of tail gas burner is communicated with the suction port of the exhaust duct in exhaust gas cleaner, tail gas burner is controlled by control circuit.
Purified solution in the present invention in purified solution container is urea liquid, urea is added by purification material entrance, filling opening can add seawater or fresh water, seawater or fresh water and urea are prepared in proportion and forms NOx catalyzer, this NOx catalyzer can be recycled, waste gas treatment cost is low, often the tail gas consumption urea of burning 100kg diesel oil or heavy oil is about 2-3 kilogram, NOx conversion ratio can up to 90%, after native system starts, control tail gas burner by control circuit to burn and the unlatching of the first vacuum pump, purified solution in purified solution container is extracted out by the first vacuum pump, sprayed in exhaust duct by nozzle, on boats and ships, the tail gas of diesel engine is introduced into tail gas burner, by tail gas burner, single-stage combustion process is carried out to tail gas, to remove the particulate matter in tail gas, the tail gas eliminating particulate matter enters exhaust duct again, secondary treatment is carried out by purified solution spray, nitrogen oxide Nox in catalytic exhaust, reduce the nitrogen oxide Nox in tail gas, finally discharge, adopt urea liquid as purified solution, discharge is made to reach standard, reduce the injury that nitrogen oxide Nox causes human body, protecting ecology resource environment.
Owing to have employed technique scheme, the present invention has compact structure, easy to operate advantage, it passes through the burning process of tail gas and the spray catalytic treatment of purified solution, to the soot particle in diesel emission tail gas, oxynitrides and hydrocarbon etc., there is significant removal effect, tail gas is made to reach teirIII emission standard, avoid using rare metal as catalyzer, save resource, reduce operating cost, it can also according to the corresponding purified solution of oxynitride concentration automatic preparation in the tail gas of discharge.
Accompanying drawing explanation
Accompanying drawing of the present invention is described as follows:
Fig. 1 is structural representation of the present invention;
In figure: 1. electric control cubicle; 2. exhaust duct; 3. purified solution container; 4. the first vacuum pump; 5. nozzle; 6. purification material entrance; 7. filling opening; 8. purified solution outlet; 9. plasma torch generator; 10. fuel tank; 11. plasma reactors; 12.PH value adjustment room; 13. alkali add mouth; 14. solution stirrers; 15.PH value sensor; 16. flow-offs; 17. second vacuum pumps; 18. liquid ports; 19. add pump automatically; 20. filters; 21. temperature transducers; 22. oxynitride concentration sensors; 23. mist of oil detectors; 24. oil mist concentration sensors; 25. liquid level sensors.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described: as shown in Figure 1, the present invention includes electric control cubicle 1, tail gas burner and exhaust gas cleaner, electric control cubicle 1 is provided with control circuit, exhaust gas cleaner comprises exhaust duct 2, purified solution container 3, first vacuum pump 4 and nozzle 5, wherein, purified solution container 3 is provided with purification material entrance 6, filling opening 7 and purified solution outlet 8, purified solution outlet 8 is communicated with by the inlet side of pipeline with the first vacuum pump 4, first vacuum pump 4 is connected with control circuit by circuit, the end that goes out of the first vacuum pump 4 is communicated with nozzle 5 by pipeline, nozzle 5 is multiple, corresponding with the exhaust passage in exhaust duct 2 on the ring wall that nozzle 5 is arranged on exhaust duct 2 respectively, the suction port of tail gas burner is communicated with the relief opening of diesel engine on boats and ships, the air outlet of tail gas burner is communicated with the suction port of the exhaust duct in exhaust gas cleaner, tail gas burner is controlled by control circuit.
Dotted line in Fig. 1 is the connecting line of control circuit, purified solution in the present invention in purified solution container is urea liquid, purified solution container can be one, also can be two, can also arrange as required, urea is added by purification material entrance, filling opening can add seawater or fresh water, seawater or fresh water and urea are prepared in proportion and forms NOx catalyzer, this NOx catalyzer can be recycled, waste gas treatment cost is low, often the tail gas consumption urea of burning 100kg diesel oil or heavy oil is about 2-3 kilogram, can up to 90% to NOx conversion ratio, after native system starts, control tail gas burner by control circuit to burn and the unlatching of the first vacuum pump, purified solution in purified solution container is extracted out by the first vacuum pump, sprayed in exhaust duct by nozzle, on boats and ships, the tail gas of diesel engine is introduced into tail gas burner, by tail gas burner, single-stage combustion process is carried out to tail gas, to remove the particulate matter in tail gas, the tail gas eliminating particulate matter enters exhaust duct again, secondary treatment is carried out by purified solution spray, nitrogen oxide Nox in catalytic exhaust, reduce the nitrogen oxide Nox in tail gas, finally discharge, adopt urea liquid as purified solution, discharge is made to reach standard, reduce the injury that nitrogen oxide Nox causes human body, protecting ecology resource environment.
As shown in Figure 1, tail gas burner comprises plasma torch generator 9, fuel tank 10 and plasma reactor 11, plasma torch generator 9 to be arranged on plasma reactor 11 and to communicate with the gas passage of crossing in plasma reactor 11, fuel tank 10 is communicated with plasma torch generator 9, plasma torch generator 9 is connected with control circuit, the suction port of plasma reactor 11 is communicated with the relief opening of diesel engine on boats and ships, and the air outlet of plasma reactor 11 is communicated with the suction port of the exhaust duct in exhaust gas cleaner.
Fuel in fuel tank 10 in tail gas burner can be combustion gas, also can be diesel oil, as taken diesel oil as fuel, plasma torch combustion technology has that purification efficiency is high, energy consumption is low and the feature such as no secondary pollution, to the soot particle (PM) in diesel emission tail gas, oxynitrides (NOx) and hydrocarbon (HC) etc., there is significant removal effect, its particulate oxide efficiency generally 60% ~ 90% scope, the removal efficiency that the removal efficiency of NOx can reach 20%, HC can reach 25% ~ 30%.
The working principle of tail gas burner is: obtain stable air plasma by Pulsed corona discharge, district of localized hyperthermia is formed in plasma torch generator central burner cylinder, make ultra-fine oil mist combustion fuel diesel atomization formed by compressed-air actuated high-speed jet, the very high temperature plasma flame formed enters plasma reactor 11, soot particle is subject to hot flame effect and discharges volatile matter rapidly in plasma reactor 11, soot particle is broken pulverizing, thus burn rapidly, combustion fan provides sufficient oxygen that soot particle is burnt completely.Because burning carries out in the gas phase, the grade of component of mixture and composition are changed, contribute to the combustion oxidation accelerating carbon soot particles.Soot particle is under high-temp combustion environment, and avoid and use highly active catalyzer, PM then can be oxidized to CO2.
Plasma technique (NonThermalPlasma, NTP) not only has good purifying effect to carbon soot particles, and also has certain removal effect to NOx and HC.
As shown in Figure 1, purified solution container 3 is two urea container tanks 3-1,3-2, the capacity of one of them urea container tank 3-1 is less than the capacity of another urea container tank 3-2, purification material entrance 6, filling opening 7 are arranged on the urea container tank 3-1 of small capacity, the purified solution outlet of the urea container tank 3-1 of small capacity is communicated with the purified solution entrance of jumbo urea container tank 3-2, the purified solution outlet of jumbo urea container tank 3-2 is communicated with the inlet side of the first vacuum pump 4, and two urea container tanks are provided with liquid level sensor.
Adopt two urea container tank 3-1, 3-2, the urea container tank 3-1 of small capacity is used for the preparation of purified solution, urea is added at purification material entrance 6, water is added from filling opening 7, the water added from filling opening 7 can be seawater, also can be fresh water, urea and water is made to form purified solution, purified solution flows in jumbo urea container tank 3-2 again, make the purifying effect that purified solution can reach best, in purification process, after the purified solution that the urea container tank 3-1 of small capacity prepares flows into jumbo urea container tank 3-2, purified solution in jumbo urea container tank 3-2 is extracted out by the first vacuum pump 4 again, sprayed to the exhaust passage in exhaust duct 2 by nozzle, at high temperature there is catalytic reduction reaction with NOx, generate harmless nitrogen and water vapour, with cleaning of off-gas.
As shown in Figure 1, jumbo urea container tank 3-2 is communicated with pH value adjustment room 12, pH value adjustment room 12 is provided with alkali and adds mouth 13, solution stirrer 14 and pH value sensor 15, solution stirrer 14 is connected with control circuit, pH value sensor 15 is connected with the signal receiving end in control circuit, room 12 is also provided with flow-off 16 in pH value adjustment, flow-off 16 is communicated with by the inlet side of pipeline with the second vacuum pump 17, the end that goes out of the second vacuum pump 17 is exhaust port, and the second vacuum pump 17 is connected with control circuit by circuit.
When pH value adjustment room 12 is in order to sewage effluent, control the pH value in sewage, enter pH value adjustment room 12 sewage to be discharged by the second vacuum pump 17 extraction, particularly when overhauling or clean, control circuit domestic demand first sets the predetermined value of effluent discharge PH, when control circuit exceedes predetermined value by the pH value that pH value sensor 15 detects in pH value adjustment room 12, just add mouth 13 by alkali and automatically add alkali, alkali after interpolation in order to sufficient mixing, stirred by solution stirrer 14, pH value pH value being adjusted sewage in room 12 adjusts to predetermined value, make emission compliance.
As shown in Figure 1, for the ease of reclaiming the purified solution after spray, jumbo urea container tank 3-2 is communicated with the liquid port 18 on the exhaust duct 2 be arranged in exhaust gas cleaner.
As shown in Figure 1, the purification material entrance 6 of the urea container tank 3-1 of small capacity is provided with and automatically adds pump 19, filling opening 7 is provided with filter 20.Automatic interpolation pump 19 can facilitate proportioning purified solution and the concentration according to required purified solution, automatically adds raw material.The water of preparation purified solution can filter by filter 20, prevents impurity from entering.
As shown in Figure 1, for the ease of automatic control combustion temperature, plasma reactor 11 is provided with temperature transducer 21, this temperature transducer 21 is connected with the temperature signal receiving terminal in control circuit.
As shown in Figure 1, the air outlet of exhaust duct 2 is provided with oxynitride concentration sensor 22, oxynitride concentration sensor 22 is connected with the signal receiving end in control circuit.Discharge the whether up to standard of tail gas for the ease of detecting, if when in tail gas, oxynitride concentration exceeds standard, control urea container tank is added raw material by control circuit, improves the concentration of purified solution.
As shown in Figure 1, for the ease of detecting the oil mist concentration of diesel engine, be connected with oil mist detector 23 on the control circuitry, control circuit is connected with oil mist concentration sensor 24 by signaling line.
As shown in Figure 1, the urea container tank 3-1 of small capacity, jumbo urea container tank 3-2 and pH value adjustment room 12 is provided with liquid level sensor 25.Liquid level sensor 25 adjusts the liquid position in room 12 for the ease of urea container tank 3-1, the jumbo urea container tank 3-2 and pH value monitoring small capacity.
Claims (9)
1. the exhaust gas purification system for high-power diesel engine, it is characterized in that: it comprises electric control cubicle (1), tail gas burner and exhaust gas cleaner, (1) is provided with control circuit to electric control cubicle, exhaust gas cleaner comprises exhaust duct (2), purified solution container (3), first vacuum pump (4) and nozzle (5), wherein, purified solution container (3) is provided with purification material entrance (6), filling opening (7) and purified solution outlet (8), purified solution outlet (8) is communicated with by the inlet side of pipeline with the first vacuum pump (4), first vacuum pump (4) is connected with control circuit by circuit, the end that goes out of the first vacuum pump (4) is communicated with nozzle (5) by pipeline, nozzle (5) is for multiple, corresponding with the exhaust passage in exhaust duct (2) on the ring wall that nozzle (5) is arranged on exhaust duct (2) respectively, the suction port of tail gas burner is communicated with the relief opening of diesel engine on boats and ships, the air outlet of tail gas burner is communicated with the suction port of the exhaust duct in exhaust gas cleaner, tail gas burner is controlled by control circuit, purified solution container (3) is two urea container tank (3-1, 3-2), the capacity of one of them urea container tank (3-1) is less than the capacity of another urea container tank (3-2), purification material entrance (6), filling opening (7) is arranged on the urea container tank (3-1) of small capacity, the purified solution outlet of the urea container tank (3-1) of small capacity is communicated with the purified solution entrance of jumbo urea container tank (3-2), the purified solution outlet of jumbo urea container tank (3-2) is communicated with the inlet side of the first vacuum pump (4), two urea container tanks are provided with liquid level sensor.
2. as claimed in claim 1 for the exhaust gas purification system of high-power diesel engine, it is characterized in that: tail gas burner comprises plasma torch generator (9), fuel tank (10) and plasma reactor (11), plasma torch generator (9) is arranged on plasma reactor (11) and goes up and communicate with the gas passage of crossing in plasma reactor (11), fuel tank (10) is communicated with plasma torch generator (9), plasma torch generator (9) is connected with control circuit, the suction port of plasma reactor (11) is communicated with the relief opening of diesel engine on boats and ships, the air outlet of plasma reactor (11) is communicated with the suction port of the exhaust duct in exhaust gas cleaner.
3. as claimed in claim 2 for the exhaust gas purification system of high-power diesel engine, it is characterized in that: on jumbo urea container tank (3-2), be communicated with pH value adjustment room (12), pH value adjustment room (12) is provided with alkali and adds mouth (13), solution stirrer (14) and pH value sensor (15), solution stirrer (14) is connected with control circuit, pH value sensor (15) is connected with the signal receiving end in control circuit, pH value adjustment room (12) is also provided with flow-off (16), flow-off (16) is communicated with by the inlet side of pipeline with the second vacuum pump (17), the end that goes out of the second vacuum pump (17) is exhaust port, second vacuum pump (17) is connected with control circuit by circuit.
4., as claimed in claim 3 for the exhaust gas purification system of high-power diesel engine, it is characterized in that: jumbo urea container tank (3-2) is communicated with the liquid port (18) on the exhaust duct be arranged in exhaust gas cleaner (2).
5. as claimed in claim 1 for the exhaust gas purification system of high-power diesel engine, it is characterized in that: the purification material entrance (6) of the urea container tank (3-1) of small capacity is provided with and automatically adds pump (19), filling opening (7) is provided with filter (20).
6., as claimed in claim 2 for the exhaust gas purification system of high-power diesel engine, it is characterized in that: on plasma reactor (11), be provided with temperature transducer (21), this temperature transducer (21) is connected with the temperature signal receiving terminal in control circuit.
7. the exhaust gas purification system for high-power diesel engine as described in claim 1,2,3,4,5 or 6, it is characterized in that: the air outlet of exhaust duct (2) is provided with oxynitride concentration sensor (22), oxynitride concentration sensor (22) is connected with the signal receiving end in control circuit.
8., as claimed in claim 7 for the exhaust gas purification system of high-power diesel engine, it is characterized in that: be connected with oil mist detector (23) on the control circuitry, control circuit is connected with oil mist concentration sensor (24) by signaling line.
9. as claimed in claim 8 for the exhaust gas purification system of high-power diesel engine, it is characterized in that: on the urea container tank (3-1) of small capacity, jumbo urea container tank (3-2) and pH value adjustment room (12), be provided with liquid level sensor (25).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310439634.2A CN103452624B (en) | 2013-09-25 | 2013-09-25 | For the exhaust gas purification system of high-power diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310439634.2A CN103452624B (en) | 2013-09-25 | 2013-09-25 | For the exhaust gas purification system of high-power diesel engine |
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| CN103452624A CN103452624A (en) | 2013-12-18 |
| CN103452624B true CN103452624B (en) | 2016-01-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104110293A (en) * | 2014-06-09 | 2014-10-22 | 武汉添蓝科技有限责任公司 | Marine diesel engine SCR common rail type urea solution spraying system |
| CN105268271A (en) * | 2015-10-14 | 2016-01-27 | 马鞍山市常立发机械制造有限公司 | Exhaust pollutant measurement and control system |
| CN112459868A (en) * | 2020-11-26 | 2021-03-09 | 丰城市环锦机械研发有限公司 | Tail gas decomposing device for ship |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19807935C1 (en) * | 1998-02-25 | 1999-08-26 | Siemens Ag | Device for reducing the NO¶x¶ content in the exhaust gas of an internal combustion engine |
| CN203669966U (en) * | 2013-09-25 | 2014-06-25 | 詹朝润 | Tail gas purification system for high-power diesel engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4238598B2 (en) * | 2003-02-26 | 2009-03-18 | 三菱ふそうトラック・バス株式会社 | NOx purification device for internal combustion engine |
| JP2009228433A (en) * | 2008-03-19 | 2009-10-08 | Denso Corp | Urea water supplying device and exhaust emission control system |
| KR20100108802A (en) * | 2009-03-30 | 2010-10-08 | 현대중공업 주식회사 | Treatment unit of exhaust gas from ship |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19807935C1 (en) * | 1998-02-25 | 1999-08-26 | Siemens Ag | Device for reducing the NO¶x¶ content in the exhaust gas of an internal combustion engine |
| CN203669966U (en) * | 2013-09-25 | 2014-06-25 | 詹朝润 | Tail gas purification system for high-power diesel engine |
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Effective date of registration: 20151009 Address after: 641400 Sichuan province Jianyang Xinguang two agency Applicant after: Zhan Chaorun Address before: 641400 Ziyang city of Sichuan Province, Jianyang Municipal Government Street Court institutions Applicant before: Zhan Chaorun |
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Effective date of registration: 20170214 Address after: 641404 Sichuan City, Jianyang Province town of Victoria Street, No. 12 Patentee after: Zhan Chaorun Address before: 641400 Sichuan province Jianyang Xinguang two agency Patentee before: Zhan Chaorun |