CN204253219U - The device of supercharged diesel engine NOx emission is reduced based on semipermeable membrane - Google Patents
The device of supercharged diesel engine NOx emission is reduced based on semipermeable membrane Download PDFInfo
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- CN204253219U CN204253219U CN201420593781.5U CN201420593781U CN204253219U CN 204253219 U CN204253219 U CN 204253219U CN 201420593781 U CN201420593781 U CN 201420593781U CN 204253219 U CN204253219 U CN 204253219U
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- semipermeable membrane
- intake duct
- water
- diesel engine
- air outlet
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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
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Abstract
The purpose of this utility model is to provide the device reducing supercharged diesel engine NOx emission based on semipermeable membrane, comprise diesel engine, turbosupercharger, intake duct, air outlet flue, water tank, water circulation pipe, intake duct is connected diesel engine respectively with air outlet flue, intake duct is installed the gas compressor of turbosupercharger, air outlet flue is installed the turbine of turbosupercharger, EGR pipe road is installed between intake duct and air outlet flue, the equal joining water box of entrance and exit of water circulation pipe, the middle part of water circulation pipe is communicated with intake duct, water-circulating pipe trackside semipermeable membrane is installed at water circulation pipe and the intake duct place of being connected, EGR pipe trackside semipermeable membrane is installed at EGR pipe road and the intake duct place of being connected, water pump and steam evaporator are installed in water circulation pipe.The utility model directly can arrange semipermeable membrane on intake duct tube wall, avoids installation nozzle, by regulating variable semipermeable membrane baffle plate, can control the work area of semipermeable membrane.
Description
Technical field
The utility model relates to a kind of diesel engine, specifically the emission reduction device of marine diesel engine.
Background technique
Along with the deterioration of environment and the raising of people's environmental protection consciousness, the pollutant of boat diesel engine has caused global extensive concern, and the hazardous emission how controlling boat diesel engine is problem demanding prompt solution.Wherein NOx was one of main noxious pollutant, and International Maritime Organization has promulgated Tier III emission limits of nitrogen oxides standard in 2008, and estimated to start in 2016 to perform, and it requires as the NOx emission value of boat diesel engine will maintain 2-3.8g/Kwh.In boat diesel engine, the generation of NOx is main relevant with the holdup time of oxygen molecule and nitrogen molecular concentration, combustion temperature, nitrogen and oxygen.Nowadays the method for several more common reduction NOx emission is had, as intake duct humidifying technology, gas recirculation system (EGR), selective catalytic reduction technology (SCR) etc.
Intake duct humidifying technology sprays into intake duct after being made water fogging by nozzle, and water smoke mixes with fresh air and participates in burning, and reaches reduction combustion temperature, reduces the effect of air and oxygen concentration in fuel oil mixture, and then the growing amount of minimizing NOx.Intake duct humidifying technology general is now all come by an independent water system, and this technology need water atomization to become minimum water droplet so that and air well mix, so require higher to the atomization of nozzle.By water circulation system of the present utility model, water route is connected with semipermeable membrane with intake duct.According to the permeability principle of semipermeable membrane, in water route, the concentration of water molecule is high, and the water molecule concentration in intake duct air is low, and water molecule can enter in intake duct through semipermeable membrane, avoids installation nozzle.Changed the work area of semipermeable membrane by variable semipermeable membrane baffle plate, the control to semipermeable membrane transparent performance can be realized.EGR Technology (EGR) is that residual gas is introduced intake duct, increases the specific heat capacity of mixed gas in cylinder, reduces the oxygen concentration in cylinder and maximum combustion temperature, thus destroys the high-temperature oxygen-enriched formation condition of NOx.Current EGR technology is mainly divided into internal EGR and outside EGR, and outside EGR can be divided into high pressure EGR and low pressure EGR two kinds, high pressure EGR is that the method, owing to having drawn a certain amount of waste gas before turbine, causes turbine to do work and reduces by suction tude after the waste gas of turbine front exhaust pipe introducing gas compressor.Because intake and exhaust pressure is different, generally by residual gas, intake duct is introduced with EGR pump for high pressure EGR system.Low pressure EGR is that the method can enter gas compressor by making waste gas, causes decline the working life of gas compressor by intake duct before the waste gas in turbine rear exhaust road introduction gas compressor.
In the CIMAC meeting that Shanghai in 2013 is held, Japanese aquatic products university has delivered one section of article (PAPER NO.:423), wherein describes the new equipment reducing oxygen molecule content in intake duct based on semipermeable membrane.This device, according to the permeance of semipermeable membrane, can make the concentration of oxygen molecule in fresh air reduce, and also use intake duct humidifying technology.Its shortcoming is complex structure, can not control the transparent performance of semipermeable membrane, and reduces the limitation of NOx generation.
Summary of the invention
The purpose of this utility model is to provide the device reducing supercharged diesel engine NOx emission based on semipermeable membrane improving the too high problem of boat diesel engine NOx discharge.
The purpose of this utility model is achieved in that
The utility model reduces the device of supercharged diesel engine NOx emission based on semipermeable membrane, it is characterized in that: comprise diesel engine, turbosupercharger, intake duct, air outlet flue, water tank, water circulation pipe, intake duct is connected diesel engine respectively with air outlet flue, intake duct is installed the gas compressor of turbosupercharger, air outlet flue is installed the turbine of turbosupercharger, EGR pipe road is installed between intake duct and air outlet flue, the equal joining water box of entrance and exit of water circulation pipe, the middle part of water circulation pipe is communicated with intake duct, water-circulating pipe trackside semipermeable membrane is installed at water circulation pipe and the intake duct place of being connected, EGR pipe trackside semipermeable membrane is installed at EGR pipe road and the intake duct place of being connected, water pump and steam evaporator are installed in water circulation pipe.
The utility model can also comprise:
1, EGR pipe road and air outlet flue connectivity part are positioned at air outlet flue, EGR pipe road and the intake duct of intake duct connectivity part between gas compressor and diesel engine after turbine.
2, the variable semipermeable membrane baffle plate of water-circulating pipe trackside regulating water-circulating pipe trackside semipermeable membrane work area is installed at water-circulating pipe trackside semipermeable membrane place, and the variable semipermeable membrane baffle plate of EGR pipe trackside of EGR pipe trackside semipermeable membrane work area is installed at EGR pipe trackside semipermeable membrane place.
Advantage of the present utility model is: by egr system of the present utility model, waste gas can be drawn after turbine, introduce after gas compressor, due to the character of semipermeable membrane, in EGR pipe road, CO2 equimolecular concentration is high, in intake duct, CO2 equimolecular concentration is low, so CO2 equimolecular can penetrate into intake duct, avoids and installs EGR pump and waste gas to the impact of turbocharger operation performance.Because air compresses through gas compressor at intake duct, the concentration of oxygen molecule and nitrogen molecular is higher, so can flow in water circulation system and egr system by semipermeable membrane, so just can while realizing intake duct humidification and EGR technology, the content of further reduction oxygen molecule and nitrogen molecular, makes the discharge of NOx reduce.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing citing, the utility model is described in more detail:
Composition graphs 1, comprise diesel engine 1, water tank 4, water pump 7, steam evaporator 8, water circulation pipe 9, semipermeable membrane 2,3, EGR pipe road 14, variable semipermeable membrane baffle plate 12,13 etc.Water circulation system is made up of water tank 4, water pump 7, steam evaporator 8, variable semipermeable membrane baffle plate 12, be connected with intake duct after gas compressor by semipermeable membrane 3, egr system draws waste gas by turbine rear exhaust road, led to intake duct after gas compressor, and be connected with intake duct 10 by semipermeable membrane 2.When diesel engine works, because the air in intake duct 10 entered gas compressor compression, oxygen molecule, nitrogen molecular concentration are high, and water molecule concentration in water circulation pipe 9 is high, residual gas molecular concentration in EGR pipe road 14 is high, based on the character of semipermeable membrane, the air oxygen molecule in intake duct can be realized, nitrogen molecular concentration reduces, water molecule and residual gas CO2 equimolecular concentration raise, and then impact participates in the concentration of oxygen and nitrogen in the air of burning, reduce combustion temperature, thus the high-temperature oxygen-enriched formation condition of broken ring NOx, the effective generation reducing NOx.The control that variable semipermeable membrane baffle plate 12,13 can realize semipermeable membrane work area is installed, further increases the flexibility of this device.
The utility model comprise diesel engine 1, water tank 4, water pump 7, steam evaporator 8, water circulation pipe 9, semipermeable membrane 2,3, EGR pipe road 14, variable semipermeable membrane baffle plate 12,13 etc.Wherein intake duct 10 is connected by semipermeable membrane 2,3 with EGR pipe road with water circulation pipe respectively, semipermeable membrane is equipped with variable baffle 12,13.
Drawn water from water tank 4 by water pump 7 in water circulation pipe, liquid water enters steam evaporator 8 and is converted into water vapour, waste gas is drawn by exhaust low pressure stage (turbine rear exhaust road) in EGR pipe road 14, leads to air inlet high pressure stage (after gas compressor intake duct).In the diesel exhaust gas stage, residual gas does work through turbine 15, drives gas compressor 11 to compress fresh air.Draw a part of waste gas from turbine rear exhaust road and enter egr system, because the residual gas molecular concentrations such as the CO2 in EGR pipe road 14 are higher than residual gas molecular concentration in intake duct 10, so the residual gas molecules such as CO2 can permeate in intake duct 10.Water molecule for water circulation pipe 9, because liquid water produces water vapour through steam evaporator 8, make the concentration of the water molecule in water circulation pipe 9 higher than water molecule concentration in intake duct 10, so can permeate in intake duct 10.In the charging stage of diesel engine, fresh air entered gas compressor 11 and compressed, and the oxygen molecule in intake duct 10, nitrogen molecular concentration are higher than water circulation pipe 9 and EGR pipe road 14, so oxygen molecule and nitrogen molecular can be permeated in the pipeline of both sides by semipermeable membrane.Along with the unlatching of intake valve, the concentration entering in cylinder oxygen molecule, nitrogen molecular in the air participating in burning reduces, and water molecule, residual gas molecular concentration increase, thus destroy high-temperature oxygen-enriched NOx formation condition, decrease the discharge of NOx.By the adjustment to semipermeable membrane baffle plate 12,13, the control to semipermeable membrane work area can be realized, add the applicability of device, flexibility.
Claims (3)
1. the device of supercharged diesel engine NOx emission is reduced based on semipermeable membrane, it is characterized in that: comprise diesel engine, turbosupercharger, intake duct, air outlet flue, water tank, water circulation pipe, intake duct is connected diesel engine respectively with air outlet flue, intake duct is installed the gas compressor of turbosupercharger, air outlet flue is installed the turbine of turbosupercharger, EGR pipe road is installed between intake duct and air outlet flue, the equal joining water box of entrance and exit of water circulation pipe, the middle part of water circulation pipe is communicated with intake duct, water-circulating pipe trackside semipermeable membrane is installed at water circulation pipe and the intake duct place of being connected, EGR pipe trackside semipermeable membrane is installed at EGR pipe road and the intake duct place of being connected, water pump and steam evaporator are installed in water circulation pipe.
2. the device reducing supercharged diesel engine NOx emission based on semipermeable membrane according to claim 1, it is characterized in that: EGR pipe road and air outlet flue connectivity part are positioned at the air outlet flue after turbine, EGR pipe road and the intake duct of intake duct connectivity part between gas compressor and diesel engine.
3. the device reducing supercharged diesel engine NOx emission based on semipermeable membrane according to claim 1, it is characterized in that: the variable semipermeable membrane baffle plate of water-circulating pipe trackside regulating water-circulating pipe trackside semipermeable membrane work area is installed at water-circulating pipe trackside semipermeable membrane place, the variable semipermeable membrane baffle plate of EGR pipe trackside of EGR pipe trackside semipermeable membrane work area is installed at EGR pipe trackside semipermeable membrane place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420593781.5U CN204253219U (en) | 2014-10-15 | 2014-10-15 | The device of supercharged diesel engine NOx emission is reduced based on semipermeable membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420593781.5U CN204253219U (en) | 2014-10-15 | 2014-10-15 | The device of supercharged diesel engine NOx emission is reduced based on semipermeable membrane |
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| Publication Number | Publication Date |
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| CN204253219U true CN204253219U (en) | 2015-04-08 |
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| CN201420593781.5U Expired - Fee Related CN204253219U (en) | 2014-10-15 | 2014-10-15 | The device of supercharged diesel engine NOx emission is reduced based on semipermeable membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405476A (en) * | 2014-10-15 | 2015-03-11 | 哈尔滨工程大学 | Semipermeable-membrane-based device for reducing NOx emission of supercharged diesel engine |
-
2014
- 2014-10-15 CN CN201420593781.5U patent/CN204253219U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405476A (en) * | 2014-10-15 | 2015-03-11 | 哈尔滨工程大学 | Semipermeable-membrane-based device for reducing NOx emission of supercharged diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20171015 |
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| CF01 | Termination of patent right due to non-payment of annual fee |