CN101798946B - Device and method for adding diesel urea solution - Google Patents
Device and method for adding diesel urea solution Download PDFInfo
- Publication number
- CN101798946B CN101798946B CN2010101120680A CN201010112068A CN101798946B CN 101798946 B CN101798946 B CN 101798946B CN 2010101120680 A CN2010101120680 A CN 2010101120680A CN 201010112068 A CN201010112068 A CN 201010112068A CN 101798946 B CN101798946 B CN 101798946B
- Authority
- CN
- China
- Prior art keywords
- pressure
- air
- urea
- urea liquid
- pressure chamber
- 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.)
- Expired - Fee Related
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
- 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)
Abstract
The invention relates to a device and a method for adding diesel urea solution and belongs to the technical field of engine exhaust-gas disposal. The device comprises a urea box, N pressure chambers connected with the urea box, a switch valve for realizing control, air inlet/outlet pipes positioned at the top of the pressure chambers, three-way valves positioned at the top of the air inlet/outlet pipes, urea solution outlet pipes positioned at the bottom of the pressure chambers, control units connected with the three-way valves, the switch valves, and urea solution flow rate controllers, wherein the other ends of the outlet pipes are connected in series with the urea solution flow rate controllers and urea solution nozzles in turn. The invention provides a pumpless urea solution adding device, a system and a method, which have the advantages of low energy consumption, simple structure, low cost of devices, reliable operation and excellent atomization effect.
Description
Technical field
The invention belongs to the fixture that engine exhaust is handled, further relate to the apparatus and method that a kind of diesel urea solution adds.
Background technique
Diesel engine has obtained using widely with the higher thermal efficiency and the lower all trades and professions of toxic emission all over the world, but its higher discharged nitrous oxides is puzzlement people's a problem always.Selecting catalytic reduction technology (SCR) is the effective ways of control diesel engine nitrogen oxide.Realizing responding accurately and fast, having the low-cost urea liquid supplier of higher reliability, conformity and atomizing effect, is to influence the key factor that diesel SCR is popularized.
Urea liquid supplier commonly used at present is divided into two kinds, a kind of compressed air assisted injection form, and another kind is the non-compressed air supplementary form.The pressurized air supplementary form is to be brought in the diesel exhaust gas after utilizing pressurized air urea to be measured the urea liquid atomizing of unit feeding.Because urea liquid is atomizing in advance, therefore atomizing effect is good in exhaust.The non-compressed air supplementary form is that direct urea liquid with certain pressure gets in the exhaust through nozzle ejection; Its form structure is simple; But because from the Diesel Engine Exhaust Pipe close; Therefore very high to the requirement of the thermal reliability of urea-spray device, generally need utilize urea liquid or Diesel Engine Coolants that nozzle is cooled off; When this external diesel exhaust gas temperature was low, the atomizing effect of non-compressed air supplementary form urea liquid in exhaust was limited, formed urea crystals at exhaust wall or catalyzer end face easily.
Present stage, there was main following problem in the diesel urea solution adding set:
(1) no matter pressurized air supplementary form or non-compressed air supplementary form, conventional urea supply system all needs the urea liquid pump.Since need to consider the corrosivity and the service conditions such as the vibration in diesel engine or the diesel-oil vehicle actual motion, high low temperature of urea, higher to the reliability and the cost requirement of urea liquid pump.
(2) the urea supply system architecture is complicated, and is with high costs, needs to consume part diesel engine electric energy.
(3) in severe cold environment, SCR system of diesel engine is urea liquid meeting crystallization when shutting down, and therefore needs heating equipment that the urea supply system is heated.The distance that urea liquid is flowed through is longer, component structural is more complicated, and heating equipment is also just more complicated.Urea liquid pump in the routine urea supply system is the most difficult parts that conduct of thermal energy, the life-span and the performance of freezing directly to influence with the crystallization meeting pump of urea in addition in the urea supply system.
(4) in order to realize stable spraying urea liquid injection pressure, need the working pressure regulator, the use of pressure regulator increases structural complexity, need add reflow pipe and the reflow pipe heating equipment relevant with pressure regulator in addition.
Summary of the invention
The object of the present invention is to provide does not a kind ofly need the urea liquid pump, and energy consumption is low, structural type is simple, installation cost is cheap urea liquid adding set and method.
A kind of diesel urea solution adding set, this adding set comprises:
Urea box 8;
N the pressure chamber 9 that links to each other with urea box 8, N is the integer more than or equal to 1, when N more than or equal to 2 the time, be the mode of being connected in parallel between N the pressure chamber;
Realize control through independent switch valve 10 between each pressure chamber 9 and the urea box 8, and the urea liquid minimum levels are greater than or equal to the high liquid level (HLL) of each pressure chamber 9 in the urea box 8;
The air that is positioned at pressure chamber 9 tops imports and exports pipe, and it highly is higher than the high liquid level (HLL) under urea box 8 working staties;
Be positioned at the three-way valve 7 that air imports and exports the pipe top, other two ends one end of three-way valve 7 links to each other with outside air, and the other end links to each other with first high-pressure air source;
Be positioned at the urea liquid delivery line of pressure chamber 9 bottoms, the other end of urea liquid delivery line is connected in series urea liquid flow control device and urea liquid nozzle 12 successively;
Control unit links to each other with three-way valve 7, switch valve 10 and urea liquid flow control device.
Above-mentioned first high-pressure air source comprises: compressed air cylinder 3; The inflating pump 2 that links to each other with compressed air cylinder 3 input ends; The plenum 5 that links to each other with compressed air cylinder 3 output terminals; Reduction valve 4 between compressed air cylinder 3 and plenum 5; The pressure regulator 6 that links to each other with plenum 5 output terminals; The output terminal of pressure regulator 6 forms first high-pressure air source.
In order to strengthen atomizing effect; The optimized project of this device also comprises: the atomizer between urea liquid flow control device and urea liquid nozzle 12; Atomizer has two input ends, and an end links to each other with the liquid output terminal of flow control device, and the other end links to each other with second high-pressure air source.
As a kind of preferred, the required pressurized air of system can be taken from the diesel engine compressed air cylinder, and the large diesel engine major part has inflating pump at present, can install inflating pump or repacking first wife's inflating pump as required additional.
Preferred as another kind, the desirable electronic inflating pump of the required pressurized air of system because the auxiliary air pressure that the urea supply system needs is lower, can adopt electric inflating pump that pressurized air is provided.
The volume of pressure chamber can be arranged to the volume of a long period urea solution consumption, thereby realizes the continuous injection of urea liquid; Or be arranged to the parallelly connected form of a plurality of pressure chambers, realize the continuous injection of urea liquid through the control of valve.
Above-mentioned reduction valve 4, pressure regulator 6, plenum 5, urea liquid flow control device, atomizer, switch valve 10 and three-way valve 7 integrated modules are installed in the inside or the outside of urea box 8.
The above-mentioned switch valve 10 that is used to control the urea liquid filling can use mortor operated valve; Also can use the automatic type mechanical valve, carry out recloser through the pressure in urea level in the pressure chamber or the pressure chamber.
A kind of diesel urea solution adding method, implementation procedure is following:
Judge whether the urea liquid of in pressure chamber 9, annotating according to urea liquid amount in each pressure chamber 9;
When needs filling urea liquid, under the control of control unit, open the switch valve 10 that links to each other with this pressure chamber, control three-way valve 7 turn-offs air and imports and exports being communicated with of pipe and high-pressure air source, opens air simultaneously and imports and exports and manage and being communicated with of outside air;
At this moment, urea liquid flow into the pressure chamber 9 from urea box 8 under the effect of self gravitation, simultaneously, the air in the pressure chamber 9 is discharged in the air through three-way valve 7; When the urea liquid in the pressure chamber 9 reaches preset capacity, under the control of control unit, off switch valve 10, shutoff three-way valve 7 is communicated with outside air; Be communicated with air then and import and export the pipe and first high-pressure air source, the air in the pressure chamber 9 compresses, and reaches preset jet pressure until its pressure, makes this pressure chamber 9 reach state to be sprayed;
After control unit sent jeting instruction to certain pressure chamber, urea liquid sprayed through urea liquid flow control device, urea liquid nozzle and gets in the blast air; Urea generates ammonia under the exhaust gas heat effect, ammonia is the nitrogen oxide in the catalytic reduction exhaust under the effect of catalyst converter, realizes nitrogen oxides pollution control in the diesel engine vent gas.
As a kind of improvement, the atomizer of between urea liquid flow control device and urea liquid nozzle 12, connecting, atomizer has two input ends, and an end links to each other with pressure chamber 9, and the other end links to each other with second high-pressure air source.
A kind of forming process of above-mentioned first high-pressure air source and the second high-pressure air source pressure is following: at first in compressed air cylinder 3, carry air by inflating pump 2; Pressurized air is through behind the air tank 3, successively through reduction valve 4, plenum 5 and pressure regulator 6; Be divided into two strands through behind the pressure regulator 6, one gets into pressure chamber 9, forms first high-pressure air source, and another burst entering atomizer forms second high-pressure air source.
The another kind of forming process of above-mentioned first high-pressure air source and the second high-pressure air source pressure is following: at first in compressed air cylinder 3, carry air by inflating pump 2; Pressurized air is divided into two strands through behind the air tank 3, and one is successively through reduction valve 4, plenum 5 and pressure regulator 6, and output forms first high-pressure air source then; One forms second high-pressure air source in addition, imports atomizer then.This scheme has prevented the influence of diesel exhaust gas pressure surge to urea-spray pressure effectively.
Diesel urea solution adding method of the present invention and device have following advantage with respect to existing technology:
(1) do not need the urea liquid pump.Do not need complicated urea supply system heating equipment, have controllability and reliability preferably.
(2) do not need conventional urea-spray pressure regulator and urea liquid reflow pipe, simplified structure, improved the reliability and the Economy of system.
(3) power of urea solution jet and atomizing all derives from the diesel engine inflating pump, has reduced the diesel engine energy that urea-spray consumes, and has improved the Economy of diesel engine; Meanwhile, pneumatic injection and atomizing have reduced the power demand of urea supply device to the diesel engine electricity consumption, have higher scheme feasibility and redundancy.
(4) adopt the urea liquid atomizing effect of compressed air assisted injection form good, improved the cryogenic property of SCR system of diesel engine, prevent that urea crystals is separated out the exhaust obstruction that causes when worst cold case.
(5) method and apparatus of diesel urea solution interpolation of the present invention, system architecture is simple, and maintainable good, the cost cost is low.
Description of drawings
Fig. 1 is a SCR system of diesel engine urea liquid adding set external scheme sketch; Among the figure, 1 is diesel engine, and 2 is inflating pump, and 3 is compressed air cylinder; 4 is reduction valve, and 5 is plenum, and 6 is pressure regulator, and 7 is three-way valve; 8 is urea box, and 9 is pressure chamber, and 10 is switch valve; 11 is urea liquid flow control device and atomizer integrated device, and 12 is the urea liquid nozzle, and 13 is the SCR catalyst converter.
Fig. 2 is the built-in scheme sketch of SCR system of diesel engine urea liquid adding set, and among the figure, 1 is diesel engine, and 2 is inflating pump; 3 is compressed air cylinder, and 4 is reduction valve, and 5 is plenum, and 6 is pressure regulator; 7 is three-way valve, and 8 is urea box, and 9 is pressure chamber, and 10 is switch valve; 11 is urea liquid flow control device and atomizer integrated device, and 12 is the urea liquid nozzle, and 13 is the SCR catalyst converter.
Fig. 3 is the sectional drawing of urea liquid flow control device and atomizer integrated device, and among the figure, 21 are the urea liquid inlet, and 22 is metering valve, and 23 is the assisted atomization air inlet, and 24 are atomizing back gas-liquid mixture exhaust port; This device is realized the accurate control of urea liquid flow and under the effect of assisted atomization air, with the urea liquid atomizing and be brought in the exhaust.
Fig. 4 is urea solution jet flow control figure among the embodiment 1, the linearity of urea-spray flow control and environmental suitability among the figure.
Fig. 5 is discharged nitrous oxides plotted curve when diesel engine ETC operating mode Central Plains machine and urea solution jet among the embodiment 1.
Embodiment
The forming process of first high-pressure air source and second high-pressure air source:
Method one: at first in compressed air cylinder 3, carry air by inflating pump 2; Pressurized air is through behind the air tank 3, successively through reduction valve 4, plenum 5 and pressure regulator 6; Be divided into two strands through behind the pressure regulator 6, one gets into pressure chamber 9, forms first high-pressure air source, and another burst entering atomizer forms second high-pressure air source.
Method two: at first in compressed air cylinder 3, carry air by inflating pump 2; Pressurized air is divided into as two through behind the air tank 3, and one is successively through reduction valve 4, plenum 5 and pressure regulator 6, and output forms first high-pressure air source then; One forms second high-pressure air source in addition, imports atomizer then.This scheme has prevented the influence of diesel exhaust gas pressure surge to urea-spray pressure effectively.
Urea liquid filling and accumulation system
When normal working, pressure chamber has urea liquid, under the pressurized air effect of plenum, has had jet pressure.When the urea liquid in certain pressure chamber is depleted to a certain degree; Control unit is judged urea liquid filling beginning; Open the switch valve 10 that links to each other with this pressure chamber this moment under the control of control unit, control three-way valve 7; Turn-off air and import and export being communicated with of pipe and high-pressure air source, open air simultaneously and import and export and manage and being communicated with of outside air; Then, urea liquid flow into the pressure chamber 9 from urea box 8 under the effect of self gravitation, simultaneously, the air in the pressure chamber 9 is discharged in the air through three-way valve 7; When the urea liquid in the pressure chamber 9 reaches preset capacity, under the control of control unit, off switch valve 10, shutoff three-way valve 7 is communicated with outside air; Be communicated with air then and import and export the pipe and first high-pressure air source, the air in the pressure chamber 9 compresses, and reaches preset jet pressure until its pressure, makes this pressure chamber 9 reach state to be sprayed;
Open switch valve and three-way valve, urea liquid flow in the pressure chamber under the effect of gravity, and when the urea liquid in the pressure chamber was full of, control system judged that the urea liquid filling finishes, and this moment, off switch valve and three-way valve got into normal working.
Urea solution jet metering and atomization system
When the urea liquid that reaches stable ejection pressure flow in urea-spray metering and the atomizer; Under the control of control unit; Import the urea liquid of accurate flow and stable supplementary compressed air to the urea liquid nozzle, under the effect of nozzle, in diesel exhaust gas, spray the urea steam fog.
Select the catalytic reduction catalyst converter
The urea steam fog generates ammonia under the effect of exhaust gas heat, evenly mixes in ammonia and the exhaust, and under the effect of catalyst converter, the nitrogen oxides pollution thing in the exhaust of selection catalytic reduction.
Control unit
The present invention is simple in structure, gets final product according to the conventional control unit of Control Parameter design.
Embodiment 1:
Map 1-5, urea liquid flow control device and atomizer take the integrated design scheme according to Fig. 3.
A discharge capacity is to have carried out national Abgasgesetz specified standard test working condition tests on the heavy high-pressure common rail supercharged diesel engine of 276kW for 9.73L rated power; Wherein SCR catalyst converter volume is 20L; The former machine discharged nitrous oxides of diesel engine test result ESC; Be European steady state test circulation or title 13-mode test cycle, be 8.59g/kW.h; ETC, promptly European transient test circulation is 9.67g/kW.h;
After using the urea liquid adding set in exhaust, to spray urea liquid, diesel engine discharged nitrous oxides test result ESC is 1.81g/kW.h; ETC is 1.66g/kW.h; The ammonia leakage peak value is lower than 8ppm.
The discharged nitrous oxides plotted curve was seen from the Changing Pattern of nitrous oxides concentration when Fig. 5 was diesel engine ETC operating mode Central Plains machine and urea solution jet, and precision of the present invention and response characteristic have satisfied the system requirements of diesel SCR fully.
Claims (9)
1. a diesel urea solution adding set is characterized in that, this adding set comprises:
Urea box (8);
N the pressure chamber (9) that links to each other with urea box (8), N is the integer more than or equal to 1, when N more than or equal to 2 the time, be the mode of being connected in parallel between N the pressure chamber;
Realize control through independent switch valve (10) between each pressure chamber (9) and the urea box (8), and the interior urea liquid minimum level of urea box (8) is greater than or equal to the high liquid level (HLL) of each pressure chamber (9);
The air that is positioned at pressure chamber (9) top imports and exports pipe, and it highly is higher than the high liquid level (HLL) under urea box (8) working state;
Be positioned at the three-way valve (7) that air imports and exports the pipe top, other two ends one end of three-way valve (7) links to each other with outside air, and the other end links to each other with first high-pressure air source;
Be positioned at the urea liquid delivery line of pressure chamber (9) bottom, the other end of urea liquid delivery line is connected in series urea liquid flow control device and urea liquid nozzle (12) successively;
Control unit links to each other with the urea liquid flow control device with three-way valve (7), switch valve (10).
2. according to the said a kind of diesel urea solution adding set of claim 1; It is characterized in that; Also comprise: be positioned at the atomizer between urea liquid flow control device and the urea liquid nozzle (12); Atomizer has two input ends, and an end links to each other with the liquid output terminal of flow control device, and the other end links to each other with second high-pressure air source.
3. according to the said a kind of diesel urea solution adding set of claim 1, it is characterized in that said first high-pressure air source comprises:
Compressed air cylinder (3);
The inflating pump (2) that links to each other with compressed air cylinder (3) input end;
The plenum (5) that links to each other with compressed air cylinder (3) output terminal;
Be positioned at the reduction valve (4) between compressed air cylinder (3) and the plenum (5);
The pressure regulator (6) that links to each other with plenum (5) output terminal;
The output terminal of pressure regulator (6) forms first high-pressure air source.
4. according to the said a kind of diesel urea solution adding set of claim 2, it is characterized in that said first high-pressure air source and second high-pressure air source comprise:
Compressed air cylinder (3);
The inflating pump (2) that links to each other with compressed air cylinder (3) input end;
The plenum (5) that links to each other with compressed air cylinder (3) output terminal;
Be positioned at the reduction valve (4) between compressed air cylinder (3) and the plenum (5);
The pressure regulator (6) that links to each other with plenum (5) output terminal; Pressure regulator (6) has two output terminals, and an end links to each other with three-way valve (7), forms first high-pressure air source; The other end links to each other with an input end of atomizer, forms second high-pressure air source.
5. according to the said a kind of diesel urea solution adding set of claim 2, it is characterized in that said first high-pressure air source and second high-pressure air source comprise:
Compressed air cylinder (3);
The inflating pump (2) that links to each other with compressed air cylinder (3) input end;
Compressed air cylinder (3) has two output terminals, and an output terminal links to each other with plenum (5), and the another one output terminal links to each other with an input end of atomizer, forms second high-pressure air source;
Be positioned at the reduction valve (4) between compressed air cylinder (3) and the plenum (5);
The pressure regulator (6) that links to each other with plenum (5) output terminal; The output terminal of pressure regulator (6) links to each other with three-way valve (7), forms first high-pressure air source.
6. according to claim 4 or 5 said a kind of diesel urea solution adding sets; It is characterized in that; The integrated module of said reduction valve (4), pressure regulator (6), plenum (5), urea liquid flow control device, atomizer, switch valve (10) and three-way valve (7) is installed in the inside or the outside of urea box (8).
7. application rights requires a kind of diesel urea solution adding method of the former cellulose solution adding set of 1 said a kind of diesel engine, it is characterized in that, comprises the steps:
Judge whether filling urea liquid in pressure chamber (9) according to urea liquid amount in each pressure chamber (9);
When needs filling urea liquid; Under the control of control unit, open the switch valve (10) that links to each other with this pressure chamber, control three-way valve (7); Turn-off air and import and export being communicated with of pipe and high-pressure air source, open air simultaneously and import and export and manage and being communicated with of outside air;
At this moment, urea liquid flow into the pressure chamber (9) from urea box (8) under the effect of self gravitation, simultaneously, the air in the pressure chamber (9) is discharged in the air through three-way valve (7); When the urea liquid in the pressure chamber (9) reaches preset capacity, under the control of control unit, off switch valve (10), control three-way valve (7) turn-offs air and imports and exports being communicated with of pipe and outside air; Be communicated with air then and import and export the pipe and first high-pressure air source, the air in the pressure chamber (9) compresses, and reaches preset jet pressure until its pressure, makes this pressure chamber (9) reach state to be sprayed;
After control unit sent jeting instruction to certain pressure chamber (9), urea liquid sprayed through urea liquid flow control device, urea liquid nozzle (12) and gets in the blast air; Urea generates ammonia under the exhaust gas heat effect, ammonia is the nitrogen oxide in the catalytic reduction exhaust under the effect of catalyst converter, realizes nitrogen oxides pollution control in the diesel engine vent gas.
8. application rights requires a kind of diesel urea solution adding method of 4 said a kind of diesel urea solution adding sets, it is characterized in that, comprises the steps:
Judge whether filling urea liquid in this pressure chamber (9) according to urea liquid amount in each pressure chamber (9);
When needs filling urea liquid; Under the control of control unit, open the switch valve (10) that links to each other with this pressure chamber, control three-way valve (7); Turn-off air and import and export being communicated with of pipe and first high-pressure air source, open air simultaneously and import and export and manage and being communicated with of outside air;
At this moment, urea liquid flow into this pressure chamber (9) from urea box (8) under the effect of self gravitation, simultaneously, the air in the pressure chamber (9) is discharged in the air through three-way valve (7); When the urea liquid in the pressure chamber (9) reaches preset capacity, under the control of control unit, off switch valve (10), control three-way valve (7) turn-offs air and imports and exports being communicated with of pipe and outside air; Be communicated with air then and import and export the pipe and first high-pressure air source, the air in the pressure chamber (9) compresses, and reaches preset jet pressure until its pressure, makes this pressure chamber reach state to be sprayed;
When the urea-spray state; The urea liquid flow control device carries out flow control to the urea liquid under the jet pressure; The air of urea liquid and the output of second high-pressure air source forms stable urea liquid and compressed-air actuated gas-liquid two-phase mist through the effect of atomizer; Under the effect of urea liquid nozzle (12), spray in the entering blast air; Urea generates ammonia under the exhaust gas heat effect, ammonia is the nitrogen oxide in the catalytic reduction exhaust under the effect of catalyst converter, realizes nitrogen oxides pollution control in the diesel engine vent gas;
The pressure of said first high-pressure air source and second high-pressure air source is realized through following method: at first in compressed air cylinder (3), carry air by inflating pump (2); Behind the pressurized air process air tank (3), successively through reduction valve (4), plenum (5) and pressure regulator (6); Through being divided into two strands behind the pressure regulator (6), one gets into pressure chamber (9), forms first high-pressure air source, and another burst entering atomizer forms second high-pressure air source.
9. application rights requires a kind of diesel urea solution of 5 said a kind of diesel urea solution adding sets to add method, it is characterized in that, comprises the steps:
Judge whether filling urea liquid in this pressure chamber (9) according to urea liquid amount in each pressure chamber (9);
When needs filling urea liquid; Under the control of control unit, open the switch valve (10) that links to each other with this pressure chamber, control three-way valve (7); Turn-off air and import and export being communicated with of pipe and first high-pressure air source, open air simultaneously and import and export and manage and being communicated with of outside air;
At this moment, urea liquid flow into this pressure chamber (9) from urea box (8) under the effect of self gravitation, simultaneously, the air in the pressure chamber (9) is discharged in the air through three-way valve (7); When the urea liquid in the pressure chamber (9) reaches preset capacity, under the control of control unit, off switch valve (10), control three-way valve (7) turn-offs air and imports and exports being communicated with of pipe and outside air; Be communicated with air then and import and export the pipe and first high-pressure air source, the air in the pressure chamber (9) compresses, and reaches preset jet pressure until its pressure, makes this pressure chamber reach state to be sprayed;
When the urea-spray state; The urea liquid flow control device carries out flow control to the urea liquid under the jet pressure; The air of urea liquid and the output of second high-pressure air source forms stable urea liquid and compressed-air actuated gas-liquid two-phase mist through the effect of atomizer; Under the effect of urea liquid nozzle (12), spray in the entering blast air; Urea generates ammonia under the exhaust gas heat effect, ammonia is the nitrogen oxide in the catalytic reduction exhaust under the effect of catalyst converter, realizes nitrogen oxides pollution control in the diesel engine vent gas;
The pressure of said first high-pressure air source and second high-pressure air source is realized through following method: at first in compressed air cylinder (3), carry air by inflating pump (2); Behind the pressurized air process air tank (3), be divided into two strands, one is successively through reduction valve (4), plenum (5) and pressure regulator (6), and output forms first high-pressure air source then; One forms second high-pressure air source in addition, imports atomizer then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101120680A CN101798946B (en) | 2010-02-23 | 2010-02-23 | Device and method for adding diesel urea solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101120680A CN101798946B (en) | 2010-02-23 | 2010-02-23 | Device and method for adding diesel urea solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101798946A CN101798946A (en) | 2010-08-11 |
| CN101798946B true CN101798946B (en) | 2012-12-26 |
Family
ID=42594769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101120680A Expired - Fee Related CN101798946B (en) | 2010-02-23 | 2010-02-23 | Device and method for adding diesel urea solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101798946B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979131A (en) * | 2010-10-20 | 2011-02-23 | 中国第一汽车集团公司 | Pneumatic dual-urea tank urea one-way valve control water heating silicon controlled rectifier (SCR) urea system |
| WO2012142745A1 (en) * | 2011-04-19 | 2012-10-26 | 潍柴动力股份有限公司 | Device and method for controlling urea injection system of diesel engine |
| US8959903B2 (en) * | 2013-03-01 | 2015-02-24 | Cummins Emission Solutions Inc. | Systems and techniques for heating urea injection systems |
| US9441518B2 (en) * | 2013-08-13 | 2016-09-13 | Cummins Emission Solutions, Inc. | Diaphragm pump system having re-priming capabilities |
| CN105626215A (en) * | 2014-10-27 | 2016-06-01 | 金有纯 | Device for regulating and controlling actual supply amount of urea entering exhaust system and regulating and controlling method |
| CN105156182A (en) * | 2015-09-17 | 2015-12-16 | 苏州亿利亚科汽车系统有限公司 | Selective catalytic reduction (SCR) injection system and method |
| DE102016213612B3 (en) * | 2016-07-25 | 2017-12-28 | Continental Automotive Gmbh | Electric catalytic converter, vehicle and method for operating an electric catalytic converter |
| CN106988838B (en) * | 2017-05-03 | 2023-07-25 | 安徽合力股份有限公司 | Exhaust aftertreatment pipeline system of internal combustion engineering machinery |
| CN109989806B (en) * | 2019-03-04 | 2021-02-05 | 中国船舶重工集团公司第七一一研究所 | Diesel engine high-pressure SCR (selective catalytic reduction) ventilation and pressure stabilization system |
| CN211648281U (en) | 2019-10-11 | 2020-10-09 | 中国船舶重工集团公司第七一一研究所 | High-pressure SCR (selective catalytic reduction) ventilation and pressure stabilization system of marine diesel engine and ship |
| CN111779968A (en) * | 2020-07-03 | 2020-10-16 | 中国科学院力学研究所 | Small-size clean high pressure annotates liquid frock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5601792A (en) * | 1992-02-24 | 1997-02-11 | Hug; Hans T. | Cleaning exhaust gases from combustion installations |
| CN1989321A (en) * | 2004-07-23 | 2007-06-27 | 日野自动车株式会社 | Method for determining nox reduction ratio in exhaust emission control device |
| CN101069001A (en) * | 2004-10-13 | 2007-11-07 | 莱奥林奇有限责任公司 | Arrangement for the dosed injection of a reducing medium into the exhaust tract of an internal combustion engine |
| CN100484613C (en) * | 2005-09-01 | 2009-05-06 | 通用汽车环球科技运作公司 | Flash injector for ammonia selective catalysis reduction nitrogen oxide aftertreatment process |
| CN201747439U (en) * | 2010-02-23 | 2011-02-16 | 中国人民解放军军事交通学院 | Diesel engine urea solution adding device |
-
2010
- 2010-02-23 CN CN2010101120680A patent/CN101798946B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5601792A (en) * | 1992-02-24 | 1997-02-11 | Hug; Hans T. | Cleaning exhaust gases from combustion installations |
| CN1989321A (en) * | 2004-07-23 | 2007-06-27 | 日野自动车株式会社 | Method for determining nox reduction ratio in exhaust emission control device |
| CN101069001A (en) * | 2004-10-13 | 2007-11-07 | 莱奥林奇有限责任公司 | Arrangement for the dosed injection of a reducing medium into the exhaust tract of an internal combustion engine |
| CN100484613C (en) * | 2005-09-01 | 2009-05-06 | 通用汽车环球科技运作公司 | Flash injector for ammonia selective catalysis reduction nitrogen oxide aftertreatment process |
| CN201747439U (en) * | 2010-02-23 | 2011-02-16 | 中国人民解放军军事交通学院 | Diesel engine urea solution adding device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-113687A 2005.04.28 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101798946A (en) | 2010-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101798946B (en) | Device and method for adding diesel urea solution | |
| CN101963084B (en) | Selective catalytic reduction urea air premixing jet system | |
| CN101988409B (en) | SCR exhaust gas aftertreatment device | |
| CN113446137B (en) | Hydrogen-ammonia dual-fuel engine system for catalytically reforming methanol to supply hydrogen by waste gas waste heat | |
| CN1935335A (en) | Flash injector for nh3-scr nox aftertreatment | |
| CN102913311A (en) | Efficient selective catalyst reduction system | |
| CN201747439U (en) | Diesel engine urea solution adding device | |
| US10753254B2 (en) | Reductant insertion assemblies including multiple metering assemblies and a single pump | |
| CN102242658A (en) | Urea injection system by adopting gas pressure source | |
| CN202789025U (en) | Urea injection system for reducing emission of nitrogen oxide (NOx) of engine | |
| CN104110293A (en) | Marine diesel engine SCR common rail type urea solution spraying system | |
| CN102146830A (en) | Metering system for injecting reducing agent in exhaust flow of internal combustion engine | |
| CN103370509A (en) | Exhaust gas receiver, internal combustion engine and method for selective catalytic reduction | |
| CN102251885A (en) | High-temperature and high-pressure fuel supply method and device for marine diesel engine | |
| CN108343534A (en) | A kind of activity control compression-ignition engine variable fuel feed system | |
| CN102022166B (en) | Waste gas heat energy recovery system | |
| CN103470351A (en) | Diesel engine tail gas selective catalytic reducing agent adding device and method | |
| CN216841973U (en) | High-pressure and low-pressure hydrogen double-injection system for hydrogen engine | |
| CN203891980U (en) | Air-assisted urea supply device for diesel engine | |
| CN104406324A (en) | Improved two-stage ejection type refrigerating system | |
| CN114017763A (en) | Urea hydrolysis ammonia production heat and steam supply system with steam ejector and method | |
| CN204591385U (en) | A kind of isothermal compression air energy storage systems | |
| CN202194704U (en) | Engine and device for reducing emission of nitrogen oxide of engine | |
| CN114165341A (en) | Ammonia-diesel dual-fuel power system based on two-phase flow ammonia supply and control method | |
| CN210934456U (en) | Energy-efficient denitration reductant gasification 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20190223 |