CN103925072B - A kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification - Google Patents
A kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification Download PDFInfo
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- CN103925072B CN103925072B CN201410149304.4A CN201410149304A CN103925072B CN 103925072 B CN103925072 B CN 103925072B CN 201410149304 A CN201410149304 A CN 201410149304A CN 103925072 B CN103925072 B CN 103925072B
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- diesel engine
- egr
- cooler
- exhaust gas
- recycled exhaust
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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
- Y02T10/12—Improving ICE efficiencies
Abstract
The object of the present invention is to provide a kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification, comprise diesel engine, turbosupercharger, suction tude, outlet pipe, suction tude is communicated with the gas compressor of diesel engine and turbosupercharger respectively, outlet pipe is communicated with the turbine of diesel engine and turbosupercharger respectively, also comprise steam generator, gas holder, condenser, cooler for recycled exhaust gas, steam jet ejector, steam jet ejector is arranged in suction tude, cooler for recycled exhaust gas is arranged between steam jet ejector and outlet pipe, the coolant outlet of cooler for recycled exhaust gas is communicated with steam generator respectively with turbine, steam generator is communicated with gas holder and air respectively, gas holder is communicated with the cooling water inlet of steam jet ejector and cooler for recycled exhaust gas respectively, condenser is arranged on the pipeline between gas holder and the cooling water inlet of cooler for recycled exhaust gas.While energy saving of the present invention, can improve the combustion and emission performance of supercharged diesel engine, package unit structure is simple, can be practically applicable to marine diesel engine system etc.
Description
Technical field
What the present invention relates to is a kind of diesel engine, specifically with the diesel engine of EGR device.
Background technique
Constantly strict along with Abgasgesetz, countries in the world are all in Devoting Major Efforts To Developing emission control technique.General emission control technique can be two classes: a class is Optimized Measures in machine, and another kind of is exhaust aftertreatment.Wherein diesel oil blended with water burning and EGR are measures in two kinds of general machines.EGR (ExhaustGasRecirculation) system, i.e. gas recirculation system, engine exhaust part to be sent back to according to motor different load situation and is entered cylinder again after gas handling system mixes with air and complete burning by this system, containing inert gas in waste gas, dilution new charge, reduces oxygen concentration, combustion rate is slowed down, reduce cylinder temperature, thus reduce the generation of NOx.Wherein, in order to reduce the temperature of EGR gas, need to adopt cooling recirculation system.Constantly study through various countries, EGR technology has now become one of the most direct effective measures reducing Diesel NOx.On the other hand, Diesel On-line Emulsifying Combustion technology also becomes one of Optimized Measures mode in machine, and emulsifying combustion is mainly divided into three kinds so far: intake duct supply water (combustion air humidification method), diesel engine water emulsifying method, directly spray water to firing chamber.Wherein intake duct water supply (air humidification method) is exactly that atomized water or water vapor are participated in burning from intake duct along with air enters firing chamber, this method mainly utilizes humidifying air thermal capacity to increase severely, thus play reduction combustion temperature, significantly reduce NOx emission.
At present, EGR technology reaches its maturity, and diesel engine intake humidifying technology constantly research among, the water spray test of domestic high-speed diesel engine intake duct is not almost carried out, and is necessary further exploration to the air inlet humidification method seeking quickness and high efficiency more.
Summary of the invention
The object of the present invention is to provide a kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification that simultaneously can realize air inlet humidification and different proportion mixing blending burning.
The object of the present invention is achieved like this:
A kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification of the present invention, comprise diesel engine, turbosupercharger, suction tude, outlet pipe, suction tude is communicated with the gas compressor of diesel engine and turbosupercharger respectively, outlet pipe is communicated with the turbine of diesel engine and turbosupercharger respectively, it is characterized in that: also comprise steam generator, gas holder, condenser, cooler for recycled exhaust gas, steam jet ejector, steam jet ejector is arranged in suction tude, cooler for recycled exhaust gas is arranged between steam jet ejector and outlet pipe, the coolant outlet of cooler for recycled exhaust gas is communicated with steam generator respectively with turbine, steam generator is communicated with gas holder and air respectively, gas holder is communicated with the cooling water inlet of steam jet ejector and cooler for recycled exhaust gas respectively, condenser is arranged on the pipeline between gas holder and the cooling water inlet of cooler for recycled exhaust gas.
The present invention can also comprise:
1, setting pressure sensor on gas holder, pipeline between condenser and gas holder installs steam bypass valve, pipeline between gas holder and steam jet ejector installs flow adjusting valve for steam, pipeline between cooler for recycled exhaust gas and outlet pipe installs EGR valve, pipeline between cooler for recycled exhaust gas and steam jet ejector and arrange EGR bypass tube between the pipeline between cooler for recycled exhaust gas and EGR valve, EGR bypass tube is arranged EGR bypass valve.
Advantage of the present invention is: the present invention utilizes EGR cooling water circulation and diesel tail gas waste heat, EGR and air inlet humidification can be realized separately, also the two completes air inlet mixing requirement by different proportion can be realized on this basis, while energy saving, can improve the combustion and emission performance of supercharged diesel engine, package unit structure is simple, can be practically applicable to marine diesel engine system etc., also be applicable to being applied to Diesel Engine Test Platform frame, contribute to the research of diesel energy-saving emission-reduction technology.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1, the present invention includes egr system, steam generator 11, steam jet ejector 2, condenser 7, vapour storage tank 10, steam bypass valve 9 and flow adjusting valve for steam 8.Wherein steam generator 11 entrance exports with turbine 12 with EGR coolant outlet 13 respectively and is connected, and steam generator 11 exports and is connected with air with vapour storage tank 10 respectively.Vapour storage tank 10 is provided with pressure transducer 16, outlet is connected with steam bypass valve 9 entrance with flow adjusting valve for steam 8 entrance respectively, flow adjusting valve for steam 8 exports and is connected with steam jet ejector 2 first injection entrance, steam bypass valve 9 exports and is connected with condenser 7 entrance, and condenser 7 exports and is connected with EGR cooling water inlet.Steam jet ejector 2 second injection entrance is connected with EGR gas, and steam jet ejector 2 working inlet exports with gas compressor 6 and is connected.
On the basis of original egr system, a steam generator 11 is arranged to EGR coolant outlet 13, utilize diesel exhaust gas to carry out heat exchange, water vapor can be produced fast.
Logical steam pipework is provided with steam bypass valve 9, prevents vapor pressure too high; Meanwhile, the water vapor of being discharged by steam bypass valve 9 passes into condenser 7, and high-temperature water vapor passes into EGR cooling water inlet after being condensed into water, completes recycle and reuse.
Steam jet ejector 2 working inlet passes into pressurized air, and injection entrance passes into EGR gas and water vapor respectively, by the ejector action that steam jet ejector 2 is special, can realize the mixing of EGR gas, water vapor and pressurized air.
(1) EGR cooling circuit.On the basis of supercharged diesel engine EGR, one steam generator 11 is arranged to EGR cooling water outlet pipe road, EGR cooling water cooling action is completed to waste gas after temperature raise, enter steam generator 11 1 end entrance by EGR coolant outlet 13, water vapor can be produced fast.EGR cooling water major part after steam generator 11 is converted into water vapor, and remaining hot water is directly back to EGR cooling water tank.
(2) water vapor loop.The water vapor that steam generator 11 produces directly enters vapour storage tank 10, completes storage vapour, voltage stabilizing.Tank internal pressure is monitored by pressure transducer 16, when overpressure user can select setting value then can open steam bypass valve 9 voluntarily, by-passing part water vapor, this part water vapor is back to EGR cooling water inlet 5 pipeline after being condensed into water by condenser 7, improves the utilization ratio of water vapor.When needs are to air inlet humidification, open flow control valve 8, water vapor is completed and the mixing of EGR gas or pressurized air by steam jet ejector 2.
(3) intake and exhaust loop.On the basis of supercharged diesel engine intake and exhaust, the waste gas exported by turbine 12 introduces steam generator 11 1 end entrance, discharges after completing heat exchange.
Whole device controls as follows:
When user carries out EGR operation, EGR valve 14 is opened, and valve 8,9 is in closed condition.EGR gas to be completed with pressurized air by steam jet ejector 2 and mixes, and enters cylinder combustion.
When user carries out air inlet wet operations, if pressure transducer 16 pressure is greater than 2bar, open flow control valve 8, flow sprays 2 via steam and to complete with pressurized air and mix as requested.When pressure transducer 16 overpressure or under the prerequisite meeting air inlet humidification requirement, open bypass valve 9, bypass part water vapor, is recycled in EGR cooling water pipeline.
When user carries out EGR and air inlet humidification co-operate, jointly open EGR valve 14, flow control valve 8, complete the mixing of EGR gas, water vapor and pressurized air, then enter cylinder and complete burning.
Claims (2)
1. the supercharged diesel engine environmental protecting device based on EGR and air inlet humidification, comprise diesel engine, turbosupercharger, suction tude, outlet pipe, suction tude is communicated with the gas compressor of diesel engine and turbosupercharger respectively, outlet pipe is communicated with the turbine of diesel engine and turbosupercharger respectively, it is characterized in that: also comprise steam generator, gas holder, condenser, cooler for recycled exhaust gas, steam jet ejector, steam jet ejector is arranged in suction tude, cooler for recycled exhaust gas is arranged between steam jet ejector and outlet pipe, the coolant outlet of cooler for recycled exhaust gas is communicated with steam generator respectively with turbine, steam generator is communicated with gas holder and air respectively, gas holder is communicated with the cooling water inlet of steam jet ejector and cooler for recycled exhaust gas respectively, condenser is arranged on the pipeline between gas holder and the cooling water inlet of cooler for recycled exhaust gas.
2. a kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification according to claim 1, it is characterized in that: setting pressure sensor on gas holder, pipeline between condenser and gas holder installs steam bypass valve, pipeline between gas holder and steam jet ejector installs flow adjusting valve for steam, pipeline between cooler for recycled exhaust gas and outlet pipe installs EGR valve, pipeline between cooler for recycled exhaust gas and steam jet ejector and arrange EGR bypass tube between the pipeline between cooler for recycled exhaust gas and EGR valve, EGR bypass tube is arranged EGR bypass valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410149304.4A CN103925072B (en) | 2014-04-12 | 2014-04-12 | A kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410149304.4A CN103925072B (en) | 2014-04-12 | 2014-04-12 | A kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification |
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| Publication Number | Publication Date |
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| CN103925072A CN103925072A (en) | 2014-07-16 |
| CN103925072B true CN103925072B (en) | 2016-01-27 |
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| CN201410149304.4A Expired - Fee Related CN103925072B (en) | 2014-04-12 | 2014-04-12 | A kind of supercharged diesel engine environmental protecting device based on EGR and air inlet humidification |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104832325B (en) * | 2015-05-14 | 2017-10-03 | 王琪山 | Spiral dust separate type oil gas water mixed combustion clarifier |
| CN105649824B (en) * | 2016-01-07 | 2017-03-15 | 湖南大学 | A kind of device of the reduction discharged nitrous oxides with variable pitch spiral nozzle device |
| CN106194507B (en) * | 2016-07-08 | 2018-06-12 | 哈尔滨工程大学 | Supercharged diesel engine emulsifying combustion is realized based on jet pump and reduces NOXThe device of discharge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19818373A1 (en) * | 1998-04-15 | 1998-11-12 | Alexander Dr Ing Waberski | Internal combustion engine combined charging process |
| JP2001132442A (en) * | 1999-11-04 | 2001-05-15 | Hideo Kawamura | Engine provided with energy recovering device |
| FI114562B (en) * | 2001-10-09 | 2004-11-15 | Waertsilae Finland Oy | Arrangement and procedure for a diesel engine |
| CN1212474C (en) * | 2003-02-27 | 2005-07-27 | 上海交通大学 | Pressure increased diesel wet air-diesel homogeneous combustion system |
| CN201891527U (en) * | 2010-11-27 | 2011-07-06 | 比亚迪股份有限公司 | Control device for controlling emission of nitrogen oxides of internal-combustion engine |
| JP5931498B2 (en) * | 2012-02-22 | 2016-06-08 | 三菱重工業株式会社 | Exhaust gas recirculation system |
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| CN103925072A (en) | 2014-07-16 |
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