CN103437865A - Automobile SCR (selective catalytic reduction) system ammonia gas generation method and device - Google Patents
Automobile SCR (selective catalytic reduction) system ammonia gas generation method and device Download PDFInfo
- Publication number
- CN103437865A CN103437865A CN2013103161566A CN201310316156A CN103437865A CN 103437865 A CN103437865 A CN 103437865A CN 2013103161566 A CN2013103161566 A CN 2013103161566A CN 201310316156 A CN201310316156 A CN 201310316156A CN 103437865 A CN103437865 A CN 103437865A
- Authority
- CN
- China
- Prior art keywords
- water
- ammonia
- aminoquinoxaline
- engine
- electrical heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to an automobile SCR (selective catalytic reduction) system ammonia gas generation method and device. According to the method, an electric heating sheet is combined with engine circulation cooling water to heat solid ammonium carbamate to generate the ammonia gas. The device mainly consists of a sealed container, the electric heating sheet and a circulating water channel, wherein the sealed container is used for containing the ammonium carbamate; the ammonium carbamate is added into the sealed container via a charging hole (4); a water pipe transversely penetrates through the center of the container; engine circulating water is connected to a device water inlet (1) via a pipeline; after passing through the main body of the device, the engine circulating water flows out of a device water outlet (5) and enters an engine circulating water pipeline again; the bottom of the main body sealer (2) of the device is provided with the electric heating sheet (9); the surface of the heating surface is in the wrinkle shape to increase the heating area; after being heated to decompose, the ammonium carbamate enters an engine SCR tail gas catalytic reduction device from an ammonia gas outlet (3) with an electric control valve. The invention has the characteristics that the ammonia gas can be quickly and efficiently generated, and the gas production rate is changed along with the engine operation working condition.
Description
Technical field
The present invention relates to a kind of automobile-used SCR(selective catalytic reduction) supplying method and the device of system reducing agent, the i.e. required reducing agent of NOx catalytic reduction.
Technical background
Constantly strict along with automobile emission regulation, the continuous employing of new technology, the NOx efficiently reduced in engine exhaust gas becomes maximum challenge.Therefore the discharge that effectively reduces NOx is an important research direction of engine art.Wherein, SCR(selective catalytic reduction) post-processing technology is one of technical way of current engine control NOx.The cardinal principle of SCR is that to spray into a certain amount of reducing agent in outlet pipe be NH
3, under the effect of catalyzer, NH
3with the NOx in exhaust, redox reaction occurring, generates harmless N
2and H
2o, discharged to atmosphere, reaches the purpose that reduces NOx discharge and environmental pollution.
NH as reducing agent
3belong to toxic substance, all there are inconvenience in transportation and use operation.The generation NH extensively adopted in world wide at present
3material be " adding indigo plant ", the aqueous solution of urea that concentration is 32.5%.During engine operation, will " add indigo plant " and be ejected in outlet pipe, and utilize the high temperature of exhaust by urea pyrolysis, hydrolysis, produce NH
3enter the SCR catalyst converter, in catalyst converter, by the effect of catalyzer, make NH
3with the NOx in motor exhaust, chemical reaction occurring, generates N
2and H
2o.Use the SCR system on vehicle, must, in the face of the regularly compromise of filling " adding indigo plant " and " adding indigo plant " storage box volume restrictions, in the present invention, use novel reducer generating means and solid-state aminoquinoxaline to produce NH
3, produce NH
3quality larger, make NH
3the interpolation cycle of carrier is " adding indigo plant " prolongation several times.Secondly, the freezing point of " adding indigo plant " is-11 ℃, lower than this temperature, will freeze, and need a set of extra heating thawing apparatus under the cold climate condition, and there is not this problem in solid-state aminoquinoxaline.Again, the minimum temperature of urea pyrolysis is 200 ℃ of left and right, and when engine exhaust temperature is low, the urea sprayed in tail gas can not decomposite enough NH
3, not only make the discharge amount of motor NOx increase, and undecomposed urea also can enter atmosphere and befouling environment with motor exhaust, solid-state aminoquinoxaline directly produces gaseous ammonia outside outlet pipe, be not subject to the impact of engine exhaust temperature, reduction efficiency is high, has avoided the problems referred to above.
Summary of the invention
The object of the present invention is to provide a kind of new work engine tail gas clean-up reducing agent method for generation and device, a kind of automobile-used SCR system ammonia production method and device, provide efficient tail gas reductant, solves the NOx environmental pollution problem.
For achieving the above object, technological scheme accompanying drawings of the present invention is as follows;
A kind of automobile-used SCR system ammonia production method, adopt the mode of the solid-state aminoquinoxaline of heating to produce required reducing agent-ammonia, described aminoquinoxaline leaves in the aminoquinoxaline parking space X that volume is 35L, when motor has just started, carry the electrical heater plater in this device of power source driving by vehicle, heating power is between 300-500 watts, heated aminoquinoxaline can decompose the generation ammonia, the ammonia produced enters motor SCR device by ammonia outlet 4, when engine cooling water temperature surpasses 70 ℃, stop electrical heater plater work, water intake 1 by the solenoid valve open device, the cooling water of motor is incorporated in the passage of motor SCR device, use the circulating water heating aminoquinoxaline, circulating water, by after device, is flowed out by water outlet, reenters the cooling water pipe of engine road, when water temperature reduces, closes water intake 1, uses the electrical heater plater heating,
The operating conditions of monitoring motor and the pressure in aminoquinoxaline parking space X, the temperature of circulating water, the open and close of closed loop control electrical heater plater and device water intake, and the conveying of ammonia, thereby the decomposition rate of control aminoquinoxaline is generation speed and the internal pressure of ammonia.
Adopt a kind of automobile-used SCR system ammonia generation device of said method, described device is by seal container 2, water pipe 7 and electrical heater plater 9 form, described seal container 2 walls are provided with charging hole 3 and ammonia outlet 4, seal container 2 end faces are provided with device water intake 1 and water outlet 5, axially be welded with the water pipe 7 of heating aminoquinoxaline in seal container 2 by dividing plate 8, and by dividing plate 8, seal container 2 is separated into to the aminoquinoxaline parking space X of mutual isolation, hot water flows into space Y and hot water outflow space Z, water intake 1 is connected by water pipe 7 with water outlet 5, the electrical heater plater 9 of fold-type is welded on the bottom of seal container 2, ammonia outlet 4 places are equipped with electric control valve.
The electrical heater plater 9 of described bottom is driven by external power supply, and power source is electric power.
Hot water in described water pipe 7 comes from engine cooling circulating water, from water intake 1 inflow, water outlet 5, flows out, and gets back to the cycle of engine water route.
Described electric control valve is controlled it by the external electrical controller and is opened and closed, thereby controls the ammonia delivery volume and install inner pressure.
Described electrical heater plater 9 is controlled its heating power by the external electrical controller, thereby controls the aminoquinoxaline decomposition rate.
The present invention has following technique effect: the rotating speed, the load that detect the motor run duration, the parameters such as seal container internal pressure, heat recirculated water temperature, control the open and close of the heating power of electrical heater plater 9 and water intake 1, water outlet 5, thereby provide appropriate reducing agent for motor in good time.Can in the full condition range of motor operation, provide ammonia, thereby reduce motor NOx discharge.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The I that Fig. 2 is Fig. 1-I sectional view.
The worm's eye view that Fig. 3 is Fig. 1.
The II that Fig. 4 is Fig. 3-II sectional view.
In figure: 1. water intake; 2. seal container; 3. charging hole; 4. ammonia outlet; 5. water outlet; 6. foot support; 7. water pipe; 8. dividing plate; 9. electrical heater plater.
X. aminoquinoxaline parking space; Y. hot water inflow space; Z. hot water outflow space
Embodiment
Below in conjunction with accompanying drawing, further illustrate particular content of the present invention and working procedure thereof.
A kind of novel reducing agent method for generation, adopting the solid state chemistry raw material is aminoquinoxaline, when aminoquinoxaline is heated at a certain temperature, will discharge ammonia, i.e. the reducing agent of NOx in motor exhaust.
A kind of novel reducing agent generating means, the water pipe 7 that this apparatus main body is circulation engine cooling circulating water in water intake 1, seal container 2, water outlet 5, seal container 2, seal container 2 bottoms are with the electrical heater plater 9 of fold.Be divided into X, Y, Z tri-parts in container.Mutually isolated by dividing plate 8, will add and leave in the X part of seal container 2 by two charging holes 3 by heated aminoquinoxaline, Y, Z two-part are hot water turnover space.Water intake 1 is connected with the engine cooling circulating water outlet by solenoid valve, and water outlet 5 is connected with the cycle of engine water inlet.
The heating approach has two, when motor just starts, adopts the electrical heater plater single heating, and energy carries power source driving by vehicle.When circulating water of engine reaches 70 while spending, close the water intake 1 of electrical heater plater simultaneous opening device, by circulating hot water, heat aminoquinoxaline, when the pressure in seal container 2 surpasses 0.5MPa, close water intake 1 and water outlet 5, reopen again after pressure drop.The open and close of the heating power of electrical heater plater and water intake 1 and water outlet 5 is controlled by peripheral control unit.Electrical heater plater and heat recirculated water heating aminoquinoxaline, make aminoquinoxaline decompose, thereby produce ammonia.
The gas produced enters conveyance conduit by ammonia outlet 4, for the motor catalytic reduction device provides reducing agent.
A kind of fast, full operating mode provides the method for tail gas reductant in real time for motor.Wherein aminoquinoxaline leaves in aminoquinoxaline parking space X, electrical heater plater heating by the heat recirculated water in the X space and bottom makes aminoquinoxaline decompose the generation ammonia, and the gas produced enters in the motor exhaust reduction catalyst converter by ammonia outlet 4.
A kind ofly novel provide the device of tail gas reductant for motor.Wherein, seal container 2 flows into space Y, hot water outflow space Z isolation by dividing plate 8 and hot water.Hot water flows into space Y and is connected by water pipe 7 with hot water outflow space Z.Aminoquinoxaline leaves the X space of seal container 2 in, and the open and close of ammonia outlet 4 is controlled by electric control valve.The bottom of aminoquinoxaline parking space X is equipped with electrical heater plater 9.
As shown in the figure, adopt the mode of the solid-state aminoquinoxaline of heating to produce the required reducing agent of motor.Aminoquinoxaline leaves in aminoquinoxaline parking space X, the parameters such as the pressure of rotating speed, load and space X during by the operation of monitoring motor, engine cooling circulating water temperature, control the heating power of electrical heater plater and the open and close of water intake 1 and water outlet 5, thereby control the decomposition rate of aminoquinoxaline, in time decompose and produce ammonia.This produces the method for ammonia, be not subject on the one hand the impact of external environment condition, when motor just starts, control electrical heater plater by controller, enough ammonias can be produced in time, when the cycle of engine coolant-temperature gage reaches while necessarily requiring, electrical heater plater can be cut off, heat aminoquinoxaline with engine thermal circulating water, play energy-conservation effect; When the device internal pressure is too high, close intake-outlet, played the effect of protective gear.The electrical heater plater of fold-type has increased hot area, has improved the efficiency of heating surface; On the other hand, the ammonia of generation has solved original aqueous solution of urea low drawback of reduction efficiency when low temperature, has reduced pollution of atmosphere.Thereby this scheme has very high market value and prospect.During engine running, according to the variation of its operating conditions, the open and close of the heating power of closed loop control electrical heater plater and water intake 1 and water outlet 5, realize the efficient NOx catalytic reduction of full operating mode, reduces pollution of atmosphere.
Claims (6)
1. an automobile-used SCR system ammonia production method is characterized in that:
Adopt the mode of the solid-state aminoquinoxaline of heating to produce required reducing agent-ammonia, described aminoquinoxaline leaves in the aminoquinoxaline parking space (X) that volume is 35L, when motor has just started, carry the electrical heater plater in this device of power source driving by vehicle, heating power is between 300-500 watts, heated aminoquinoxaline can decompose the generation ammonia, the ammonia produced enters motor SCR device by ammonia outlet (4), when engine cooling water temperature surpasses 70 ℃, stop electrical heater plater work, water intake (1) by the solenoid valve open device, the cooling water of motor is incorporated in the passage of motor SCR device, use the circulating water heating aminoquinoxaline, circulating water, by after device, is flowed out by water outlet, reenters the cooling water pipe of engine road, when water temperature reduces, closes water intake (1), uses the electrical heater plater heating,
The operating conditions of monitoring motor and the pressure in aminoquinoxaline parking space (X), the temperature of circulating water, the open and close of closed loop control electrical heater plater and device water intake, and the conveying of ammonia, thereby the decomposition rate of control aminoquinoxaline is generation speed and the internal pressure of ammonia.
2. adopt a kind of automobile-used SCR system ammonia generation device of the described method of claim 1, described device is comprised of seal container (2), water pipe (7) and electrical heater plater (9), it is characterized in that:
Described seal container (2) wall is provided with charging hole (3) and ammonia outlet (4), seal container (2) end face is provided with device water intake (1) and water outlet (5), axially be welded with the water pipe (7) of heating aminoquinoxaline in seal container (2) by dividing plate (8), and by dividing plate (8), seal container (2) is separated into to the aminoquinoxaline parking space (X) of mutual isolation, hot water inflow space (Y) and hot water outflow space (Z), water intake (1) is connected by water pipe (7) with water outlet (5), the electrical heater plater of fold-type (9) is welded on the bottom of seal container (2), ammonia outlet (4) locates to be equipped with electric control valve.
3. a kind of automobile-used SCR system ammonia generation device according to claim 2 is characterized in that:
The electrical heater plater of described bottom (9) is driven by external power supply, and power source is electric power.
4. according to the described a kind of automobile-used SCR system ammonia generation device of claim 2 or 3, it is characterized in that:
Hot water in described water pipe (7) comes from engine cooling circulating water, from water intake (1) inflow, water outlet (5), flows out, and gets back to the cycle of engine water route.
5. a kind of automobile-used SCR system ammonia generation device according to claim 2 is characterized in that:
Described electric control valve is controlled it by the external electrical controller and is opened and closed, thereby controls the ammonia delivery volume and install inner pressure.
6. a kind of automobile-used SCR system ammonia generation device according to claim 2 is characterized in that:
Described electrical heater plater (9) is controlled its heating power by the external electrical controller, thereby controls the aminoquinoxaline decomposition rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316156.6A CN103437865B (en) | 2013-07-25 | 2013-07-25 | A kind of automotive SCR system ammonia production method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316156.6A CN103437865B (en) | 2013-07-25 | 2013-07-25 | A kind of automotive SCR system ammonia production method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103437865A true CN103437865A (en) | 2013-12-11 |
| CN103437865B CN103437865B (en) | 2015-12-09 |
Family
ID=49691569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310316156.6A Expired - Fee Related CN103437865B (en) | 2013-07-25 | 2013-07-25 | A kind of automotive SCR system ammonia production method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103437865B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670659A (en) * | 2013-12-31 | 2014-03-26 | 苏州市职业大学 | Bus hybrid power cooling system |
| CN106495184A (en) * | 2016-12-28 | 2017-03-15 | 宁波立达智能控制技术有限公司 | Solid-state ammonium SCR system ammonia generating means |
| CN106769645A (en) * | 2016-12-28 | 2017-05-31 | 宁波立达智能控制技术有限公司 | Ammonium salt thermal decomposition balance device for pressure measurement |
| US10695719B2 (en) | 2016-12-01 | 2020-06-30 | Loughborough University | Producing ammonium carbamate and reducing nitrogen oxides |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3422175A1 (en) * | 1984-06-04 | 1985-12-19 | Julius Dr. 8000 München Kern | Process for adding ammonia to exhaust gases or air containing acidic pollutants |
| CN1256641A (en) * | 1997-05-14 | 2000-06-14 | Hjs汽车技术有限公司 | Method and device for reducing nitrogen oxides in SCR catalyst |
| WO2009109423A1 (en) * | 2008-02-29 | 2009-09-11 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Evaporation unit for producing gaseous ammonia |
| CN101574616A (en) * | 2009-06-08 | 2009-11-11 | 叶力平 | Flue gas denitrification process for preparing ammonia with ammonium bicarbonate dry method by pyrolysis and system thereof |
-
2013
- 2013-07-25 CN CN201310316156.6A patent/CN103437865B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3422175A1 (en) * | 1984-06-04 | 1985-12-19 | Julius Dr. 8000 München Kern | Process for adding ammonia to exhaust gases or air containing acidic pollutants |
| CN1256641A (en) * | 1997-05-14 | 2000-06-14 | Hjs汽车技术有限公司 | Method and device for reducing nitrogen oxides in SCR catalyst |
| US6399034B1 (en) * | 1997-05-14 | 2002-06-04 | Hjs Fahrzeugtechnik Gmbh & Co. | Process for reducing nitrogen oxides on SCR catalyst |
| WO2009109423A1 (en) * | 2008-02-29 | 2009-09-11 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Evaporation unit for producing gaseous ammonia |
| CN101574616A (en) * | 2009-06-08 | 2009-11-11 | 叶力平 | Flue gas denitrification process for preparing ammonia with ammonium bicarbonate dry method by pyrolysis and system thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670659A (en) * | 2013-12-31 | 2014-03-26 | 苏州市职业大学 | Bus hybrid power cooling system |
| US10695719B2 (en) | 2016-12-01 | 2020-06-30 | Loughborough University | Producing ammonium carbamate and reducing nitrogen oxides |
| CN106495184A (en) * | 2016-12-28 | 2017-03-15 | 宁波立达智能控制技术有限公司 | Solid-state ammonium SCR system ammonia generating means |
| CN106769645A (en) * | 2016-12-28 | 2017-05-31 | 宁波立达智能控制技术有限公司 | Ammonium salt thermal decomposition balance device for pressure measurement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103437865B (en) | 2015-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101417296B1 (en) | Power plant for ship with selective catalytic reuction system for internal combustion engine | |
| US9381466B2 (en) | Exhaust gas purification system | |
| JP5804376B2 (en) | Exhaust gas purification device for internal combustion engine | |
| US20100319321A1 (en) | Engine Powered Machine | |
| CN103437865B (en) | A kind of automotive SCR system ammonia production method and device | |
| CN104847459A (en) | Internal combustion engine | |
| KR101185413B1 (en) | Nox emission purification system using solid ammonium salt and selective catalytic reduction catalyst | |
| CN103912352A (en) | Ammonia flow rate fine control device of solid selective catalytic reduction (SSCR) system | |
| JP2010065581A (en) | Exhaust emission control system of internal combustion engine | |
| US9476336B2 (en) | Container having a heating device for a tank for storing a liquid additive and motor vehicle having a tank | |
| CN106437949B (en) | A kind of syndrome exhaust gas cleaner suitable for High-Powered Vehicle | |
| CN103055672A (en) | Two-step oxidation-reduction flue gas denitration method | |
| CN103912348A (en) | Electric heating ammonium bicarbonate dry ammonium preparation and measured spraying system | |
| US9694340B2 (en) | Reactor for solid ammonium salt, a method of controlling the reactor, and NOx emission purification system using solid ammonium salt and selective catalytic reduction | |
| JP2013124609A (en) | Exhaust emission control device of internal combustion engine | |
| CN105736161B (en) | A kind of pressure booster with variable cross section nozzle ring method of actuator control | |
| CN105501027A (en) | Device capable of utilizing waste heat of automobile exhaust for heating | |
| JP2013124608A (en) | Exhaust emission control device of internal combustion engine | |
| KR20150137332A (en) | Power plant with selective catalytic reuction system | |
| CN105697106A (en) | Urea heating device for efficient SCR, and use method thereof | |
| JP2007182804A (en) | Exhaust emission control device | |
| JP5915927B2 (en) | Exhaust gas purification device for internal combustion engine | |
| CN107109990B (en) | Selective catalytic reduction system and power plant comprising same | |
| CN103437866B (en) | For automotive selective catalytic reduction system full working scope provides reducing agent method and device | |
| KR102264968B1 (en) | Selective catalytic reduction system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Qu Dawei Inventor after: Li Jun Inventor after: Fan Luyan Inventor after: Gao Ying Inventor after: Ma Junyan Inventor after: Zhang Kai Inventor after: Feng Yuanzhi Inventor before: Qu Dawei Inventor before: Li Jun Inventor before: Fan Luyan Inventor before: Gao Ying Inventor before: Ma Junyan Inventor before: Zhang Kai Inventor before: Feng Yuanzhi |
|
| CB03 | Change of inventor or designer information | ||
| 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: 20151209 Termination date: 20160725 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |