CN201835899U - Pump power driven air-assist atomized urea reducing agent spray and control system - Google Patents
Pump power driven air-assist atomized urea reducing agent spray and control system Download PDFInfo
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- CN201835899U CN201835899U CN2010201361004U CN201020136100U CN201835899U CN 201835899 U CN201835899 U CN 201835899U CN 2010201361004 U CN2010201361004 U CN 2010201361004U CN 201020136100 U CN201020136100 U CN 201020136100U CN 201835899 U CN201835899 U CN 201835899U
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- reducing agent
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- carbamide
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Abstract
The utility model relates to a pump power driven air-assist atomized urea reducing agent spray and control system. The system is characterized in that a pressure regulating valve is arranged at an air inlet end of a compressed air main pipe, and an air outlet end of the compressed air main pipe is connected with a urea reducing agent spray nozzle; a urea reducing agent backflow conveying pipe is connected with an urea reducing agent container; a urea reducing agent conveying pipe and the urea reducing agent backflow conveying pipe are communicated with the urea reducing agent spray nozzle through a liquid flow rate electromagnetic valve; a temperature sensor and a nitrogen oxide (NOX) sensor, which are arranged on an exhaust pipe of an engine, are electrically connected with a control unit; and the control unit is electrically connected with a gas flow rate electromagnetic valve, the liquid urea reducing agent flow rate electromagnetic valve and a urea pump. A backflow loop is designed, and the flow rate of the urea reducing agent is controlled, so that the urea reducing agent is fully atomized in a two-cavity mixing unit, and the aim of eliminating NOX is achieved; the cost of the system is equivalent to about a third to a half of that of an imported system; and the reliability is high.
Description
Technical field:
The utility model relates to a kind of air-assisted atomized urea reducing agent spraying controlling system of pump power, is applied to the motor car engine industry, has satisfied the environmental requirement of Europe more than 4.
Background technique:
Harmful components in the automobile engine to exhaust mainly are PM, NO
X, HC and CO etc.In 2～3 years, low emission level engine has become people's arguement, has been concerned about even has thirsted for an ideal of realization in the past.
The 2007 emission regulation demands automakers of American National Environmental Protection Agency (EPA) reduce the particle (PM) and the nitrogen oxide (NO of waste gas simultaneously
X) two kinds of pollutants.This needs suitable skill, and what shortcut addresses this problem does not have to walk.By traditional method, reduce a kind of pollution and certainly will cause another kind of increase of polluting.As if the automaker be absorbed in predicament.
Under the pressure of Abgasgesetz, diesel engine for automobile just constantly carries out technology upgrading and improvement on the one hand, on the other hand, selects appropriate post-processing technology strategy and equipment, for example, and SCR, DPF, DOC etc.
The essence of SCR technology is to utilize urea at high temperature to decomposite NH
3, as the NH of reducing agent
3With the NO in the engine exhaust
XUnder the comprehensive function of catalyzer and temperature, react, generate nontoxic N under the desirable operating mode
2And H
2O, thus reach the purpose of purification.The SCR technology began abroad the denitration technology that the stationary source as power station etc. uses and has carried out exploitation and extensive use from the seventies.For tackling the requirement of new environmental regulation, abroad the SCR technology successfully has been transplanted on the diesel car since 90 years, and the corresponding exploitation checking of having carried out SCR catalyst process technology and carbamide reducing agent, realized industrial applications, for example, European and Japanese.At present, Ou Zhou great majority are made the merchant and have been begun adamantine employing SCR technology and realize Europe 4 and Europe 5 standards.
The external reason of so hankering after the SCR technology mainly is that SCR has lot of advantages, for example, can have 50～85% NO in the scope of 250～550 ℃ of delivery temperatures
XRemove efficient, and can effectively reduce the emission level of PM; SCR can easily satisfy Europe 4 and Europe 5 levels, also has the potentiality that reach Europe 6 levels; Reach the SCR technology that adopt in Europe 4 at present, the fuel oil consumption of motor can reduce by 3～6%; The SCR catalyzer does not contain precious metal, and is more relatively low than cost; SCR is to the quality of fuel oil for vehicles, and particularly Sulpher content is insensitive.Based on above analysis, the SCR post-processing technology is the vehicle condition and the fuel oil for vehicles situation of suitable China also.
If applied the vehicle-mounted SCR post-processing technology in China in 2008, must resolve the vital technological difficulties such as atomized spray, SCR catalyzer conversion efficiency, ammonia amount of leakage of control dosage, the carbamide reducing agent of carbamide reducing agent supply, carbamide reducing agent.The premises all relates to the problem of carbamide reducing agent.In these problems, the measure control of carbamide reducing agent and atomized spray are key points.It relates to the problem of blockage problem, catalyst activity problem, carbamide reducing agent corrosion and the coking and blocking nozzle of catalyst surface.
According to the way of offshore company, the emission compliance of automobile normally adopts the ECU and the DCU electronics module of standard, and carries out the communication compatibility with vehicle-mounted computer.But system is with high costs, and domestic automobile production enterprise and user vehicle are beyond affordability.
From stoichiometrical angle analysis, carbamide reducing agent is higher than all can decompose more than 150 ℃ in temperature emits ammonia, to realize NO
XRemoving.
The after-treatment system that offshore company sells in China, what do not state that the supply of carbamide reducing agent adopts is ' pumping mode ' of which kind of type, but and ' pumping power source ' relative section and components and parts are integrated is packaged in together, and dress up jointless integral body by special hard shell body sealed packet, become an independently non-removable unit module, disposable purchase, disposable installation, disposable replacing, offshore company is responsible for maintenance specially; The DCU of offshore company for example, its price is high, about 4500～6000 yuan/part; This DCU just possesses the function that fluid pressure is carried and ratio is measured.
Summary of the invention:
The purpose of this utility model is to provide a kind of air-assisted atomized urea reducing agent spraying controlling system of pump power, it relies on the driving of micropump through the carbamide reducing agent that filters, the constant flow of outlet end, carbamide reducing agent and pressurized air mixed aerosol in urea nozzle, the amount of air quantity and carbamide reducing agent relies on the adjusting and the control of flow solenoid valve, unnecessary carbamide reducing agent is back in the carbamide reducing agent case, and this system is according to the temperature or the NO of outlet pipe feedback
XParameter realizes the control to the urea flow, and carbamide reducing agent mixed gas atomizing effect is good, reaches the NO in the vehicle exhaust
XPurified treatment; System is reliable, and is with low cost, practical.
The technical solution of the utility model is achieved in that a kind of air-assisted atomized urea reducing agent spraying controlling system of pump power, by the gas flow solenoid valve, the manual liquid switch, filter, the fluid flow solenoid valve, one-way valve, control unit, temperature transducer, NOx sensor, the urea reducing agent nozzle in gas-liquid two chambeies, engine exhaust pipe, urea pump, pressurized air is responsible for, the carbamide reducing agent delivery pipe, carbamide reducing agent backflow delivery pipe, the carbamide reducing agent container cover, vehicle-mounted 24V DC dynamo power supply, the carbamide reducing agent container, pressure regulator valve is formed; It is characterized in that: the inlet end that pressurized air is responsible for is provided with pressure regulator valve, and the outlet side communicates with urea reducing agent nozzle, and carbamide reducing agent backflow delivery pipe is connected on the carbamide reducing agent container; The carbamide reducing agent container cover is fixed on the carbamide reducing agent container; The carbamide reducing agent container bottom connects the manual liquid switch, and the carbamide reducing agent delivery pipe communicates with urea reducing agent nozzle by the fluid flow solenoid valve with carbamide reducing agent backflow delivery pipe, and the carbamide reducing agent delivery pipe is provided with filter, urea pump and one-way valve; The temperature transducer and the NOx sensor that are located on the engine exhaust pipe are electrically connected with control unit, and control unit and gas flow solenoid valve and fluid flow solenoid valve and urea pump are electrically connected.
The pressure range that described pressurized air is responsible for is at 0.1～0.3Mpa; Signal by control unit output comes the aperture of adjustments of gas flow solenoid valve to finish.
The aperture of described fluid flow solenoid valve is regulated by the signal of control unit output; The urea flow is variable.
The input signal of described control unit comes from temperature transducer, or NOx sensor, or the result of temperature transducer and the match of NOx sensor output signal.
The conveying of described carbamide reducing agent is realized by urea pump, vehicle-mounted 24V DC dynamo power source driving urea pump; Reducing agent liquid that the carbamide reducing agent delivery pipe is carried and pressurized air are responsible for the air of carrying and are mixed in the urea reducing agent nozzle in gas-liquid two chambeies, form particle size at 0.5～50 μ m aerosol mixture.
Described used urea pump is 24V direct current micro electromagnetic diaphragm pump, Machinery Diaphragm Pump, plunger pump or the gear pump of industry.
The rate of discharge of described urea pump and constant pressure are provided with carbamide reducing agent backflow delivery pipe, with fluid flow electromagnetic valve capacity of reflux; The outlet pressure of urea pump always is higher than pressure 0.04～0.06Mpa that pressurized air is responsible for.
Good effect of the present utility model is that the temperature that adopts the very high and inexpensive industrial thermocouple of reliability to measure is controlled the urea flow as main contral parameter, adopt industrial micropump as urea pump, the design reflux circuit, control carbamide reducing agent flow, make carbamide reducing agent fully atomizing in two chamber mixed cells, reach and eliminate NO
XPurpose; Its cost is equivalent to about 1/2-1/3 of inlet system, and the reliability height relies on domestic resource to realize industrial applications easily.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described: as shown in Figure 1, a kind of air-assisted atomized urea reducing agent spraying controlling system of pump power is by gas flow solenoid valve 1, motor exhaust 2, manual liquid switch 3, filter 4, fluid flow solenoid valve 5, one-way valve 6, control unit 7, temperature transducer 8, NOx sensor 9, the urea reducing agent nozzle 10 in gas-liquid two chambeies, engine exhaust pipe 11, urea pump 12, pressurized air is responsible for 13, carbamide reducing agent delivery pipe 14, carbamide reducing agent backflow delivery pipe 15, carbamide reducing agent container cover 16, vehicle-mounted 24V DC dynamo power supply 17, carbamide reducing agent container 18, pressure regulator valve 19 is formed; It is characterized in that: the pressurized air person in charge 13 inlet end is provided with pressure regulator valve 19, and the outlet side communicates with urea reducing agent nozzle 10, and carbamide reducing agent backflow delivery pipe 15 is connected on the carbamide reducing agent container 18; Carbamide reducing agent container cover 16 is fixed on carbamide reducing agent container 18; Carbamide reducing agent container 18 bottoms connect manual liquid switch 3, carbamide reducing agent delivery pipe 14 communicates with urea reducing agent nozzle 10 by fluid flow solenoid valve 5 with carbamide reducing agent backflow delivery pipe 15, and carbamide reducing agent delivery pipe 14 is provided with filter 4, urea pump 12 and one-way valve 6; The temperature transducer 8 and the NOx sensor 9 that are located on the engine exhaust pipe 11 are electrically connected with control unit 7, and control unit 7 and gas flow solenoid valve 1 and fluid flow solenoid valve 5 and urea pump 12 are electrically connected.
Described pressurized air is responsible for 13 pressure range at 0.1～0.3Mpa; Signal by control unit 7 outputs comes the aperture of adjustments of gas flow solenoid valve 1 to finish.
The aperture of described fluid flow solenoid valve 5 is regulated by the signal of control unit 7 outputs; The urea flow is variable.
The input signal of described control unit 7 comes from temperature transducer 8, or NOx sensor 9, or the result of temperature transducer 8 and NOx sensor 9 output signal matches.
The conveying of described carbamide reducing agent is realized that by urea pump 12 vehicle-mounted 24V DC dynamo power supply 17 drives urea pump 12; Reducing agent liquid that carbamide reducing agent delivery pipe 14 is carried and pressurized air are responsible for 13 air of carrying and are mixed in the urea reducing agent nozzle 10 in gas-liquid two chambeies, form particle size at 0.5～50 μ m aerosol mixture.
Described used urea pump 12 is 24V direct current micro electromagnetic diaphragm pump, Machinery Diaphragm Pump, plunger pump or gear pumps of industry.
The rate of discharge of described urea pump 12 and constant pressure are provided with carbamide reducing agent backflow delivery pipe 15, with fluid flow solenoid valve 5 control capacities of reflux; The outlet pressure of urea pump 12 always is higher than pressurized air and is responsible for pressure 0.04～0.06Mpa of 13.
Adopting internal diameter is that the 4mm Stainless Steel Tube is responsible for 13 as pressurized air, and pressurized air is responsible for 13 pressure range at 0.1Mpa, is preestablished by pressure regulator valve 19, and compressed-air actuated power source can be from vehicle-mounted braking gas receiver; Adopt internal diameter be the 4mm Stainless Steel Tube as carbamide reducing agent delivery pipe 14, the miniature gears pump that adopts the 24V direct current is as urea pump 12, the peak rate of flow 80mL/min of outlet end; The aperture of regulating liquid flow solenoid valve 5 makes the pressure range of the carbamide reducing agent that flows to urea reducing agent nozzle 10 at 0.14Mpa; The aperture of fluid flow solenoid valve 5 is regulated by the signal of control unit 7 outputs; The input signal of control unit 7 comes from the temperature transducer 8 of industry; Carbamide reducing agent container 18 is to be made by the corrosion resistant plate weldering of thickness 1.5mm to form capacity 30L; Reducing agent liquid that carbamide reducing agent delivery pipe 14 is carried and pressurized air are responsible for 13 urea reducing agent nozzle 10 mixing in gas-liquid two chambeies, and nozzle adopts the nozzle of industrialized stainless steel material, forms particle size at 0.5～50 μ m aerosol mixture; During system start-up, the preferential startup gas flow solenoid valve 1 of control unit 7 postpones to restart fluid flow solenoid valve 5 after 5 seconds; Equally, finish test after, system closing, at first the closing liquid flow solenoid valve 5, postpone to close gas flow solenoid valve 1 again after 5 seconds; Control unit 7 does not need to be connected communication with vehicle-mounted ECU with DCU.
Claims (7)
1. the air-assisted atomized urea reducing agent spraying controlling system of a pump power is by gas flow solenoid valve (1), motor exhaust (2), manual liquid switch (3), filter (4), fluid flow solenoid valve (5), one-way valve (6), control unit (7), temperature transducer (8), NOx sensor (9), the urea reducing agent nozzle (10) in gas-liquid two chambeies, engine exhaust pipe (11), urea pump (12), pressurized air is responsible for (13), carbamide reducing agent delivery pipe (14), carbamide reducing agent backflow delivery pipe (15), carbamide reducing agent container cover (16), vehicle-mounted 24V DC dynamo power supply (17), carbamide reducing agent container (18), pressure regulator valve (19) is formed; It is characterized in that: the inlet end that pressurized air is responsible for (13) is provided with pressure regulator valve (19), and the outlet side communicates with urea reducing agent nozzle (10), and carbamide reducing agent backflow delivery pipe (15) is connected on the carbamide reducing agent container (18); Carbamide reducing agent container cover (16) is fixed on the carbamide reducing agent container (18); Carbamide reducing agent container (18) bottom connects manual liquid switch (3), carbamide reducing agent delivery pipe (14) communicates with urea reducing agent nozzle (10) by fluid flow solenoid valve (5) with carbamide reducing agent backflow delivery pipe (15), and carbamide reducing agent delivery pipe (14) is provided with filter (4), urea pump (12) and one-way valve (6); Vehicle-mounted 24V DC dynamo power supply (17), driving urea pump (12); The temperature transducer (8) and the NOx sensor (9) that are located on the engine exhaust pipe (11) are electrically connected with control unit (7), and control unit (7) is electrically connected with gas flow solenoid valve (1), fluid flow solenoid valve (5) and urea pump (12).
2. the air-assisted atomized urea reducing agent spraying controlling system of a kind of pump power according to claim 1 is characterized in that pressure range that described pressurized air is responsible for (13) is at 0.1～0.3Mpa; Signal by control unit (7) output comes the aperture of adjustments of gas flow solenoid valve (1) to finish.
3. the air-assisted atomized urea reducing agent spraying controlling system of a kind of pump power according to claim 1 is characterized in that the aperture of described fluid flow solenoid valve (5) is regulated by the signal of control unit (7) output; The urea flow is variable.
4. the air-assisted atomized urea reducing agent spraying controlling system of a kind of pump power according to claim 1, the input signal that it is characterized in that described control unit (7) comes from temperature transducer (8), or NOx sensor (9), or the result of temperature transducer (8) and NOx sensor (9) output signal match.
5. the air-assisted atomized urea reducing agent spraying controlling system of a kind of pump power according to claim 1, the conveying that it is characterized in that described carbamide reducing agent is realized by urea pump, reducing agent liquid that carbamide reducing agent delivery pipe (14) is carried and pressurized air are responsible for the air of (13) carrying and are mixed in the urea reducing agent nozzle (10) in gas-liquid two chambeies, form particle size at 0.5～50 μ m aerosol mixture.
6. the air-assisted atomized urea reducing agent spraying controlling system of a kind of pump power according to claim 1 is characterized in that described used urea pump (12) is 24V direct current micro electromagnetic diaphragm pump, Machinery Diaphragm Pump, plunger pump or the gear pump of industry.
7. the air-assisted atomized urea reducing agent spraying controlling system of a kind of pump power according to claim 1, the rate of discharge and the constant pressure that it is characterized in that described urea pump (12), carbamide reducing agent backflow delivery pipe (15) is set, with fluid flow solenoid valve (5) control capacity of reflux; The outlet pressure of urea pump (12) always is higher than pressure 0.04～0.06Mpa that pressurized air is responsible for (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201361004U CN201835899U (en) | 2010-03-13 | 2010-03-13 | Pump power driven air-assist atomized urea reducing agent spray and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201361004U CN201835899U (en) | 2010-03-13 | 2010-03-13 | Pump power driven air-assist atomized urea reducing agent spray and control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201835899U true CN201835899U (en) | 2011-05-18 |
Family
ID=44006007
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201361004U Expired - Lifetime CN201835899U (en) | 2010-03-13 | 2010-03-13 | Pump power driven air-assist atomized urea reducing agent spray and control system |
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|---|---|
| CN (1) | CN201835899U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806238A (en) * | 2010-03-13 | 2010-08-18 | 中国第一汽车集团公司 | Air-assisted atomized urea reducing agent spraying controlling system of pump power |
| CN103321728A (en) * | 2012-03-22 | 2013-09-25 | 浙江卡韦德新能源科技有限公司 | Urea pump for treating tail gas of diesel engine |
| CN104500184A (en) * | 2014-11-26 | 2015-04-08 | 中国煤炭科工集团太原研究院有限公司 | Novel cyclic-type waste gas purification apparatus |
| CN104819039A (en) * | 2015-04-27 | 2015-08-05 | 东莞正扬电子机械有限公司 | Urea pump and urea system containing same |
| CN107461245A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN109276943A (en) * | 2018-11-13 | 2019-01-29 | 中国北方稀土（集团）高科技股份有限公司 | The devices and methods therefor of ammonium bicarbonate solution removal of impurities oil removing |
| GB2596846A (en) * | 2020-07-09 | 2022-01-12 | Jaguar Land Rover Ltd | Secondary air injection system and control method |
-
2010
- 2010-03-13 CN CN2010201361004U patent/CN201835899U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806238A (en) * | 2010-03-13 | 2010-08-18 | 中国第一汽车集团公司 | Air-assisted atomized urea reducing agent spraying controlling system of pump power |
| CN103321728A (en) * | 2012-03-22 | 2013-09-25 | 浙江卡韦德新能源科技有限公司 | Urea pump for treating tail gas of diesel engine |
| CN103321728B (en) * | 2012-03-22 | 2015-04-15 | 浙江卡韦德新能源科技有限公司 | Urea pump for treating tail gas of diesel engine |
| CN104500184A (en) * | 2014-11-26 | 2015-04-08 | 中国煤炭科工集团太原研究院有限公司 | Novel cyclic-type waste gas purification apparatus |
| CN104819039A (en) * | 2015-04-27 | 2015-08-05 | 东莞正扬电子机械有限公司 | Urea pump and urea system containing same |
| CN107461245A (en) * | 2016-06-06 | 2017-12-12 | 天纳克（苏州）排放系统有限公司 | Integrating device, exhaust gas aftertreatment system and control method |
| CN109276943A (en) * | 2018-11-13 | 2019-01-29 | 中国北方稀土（集团）高科技股份有限公司 | The devices and methods therefor of ammonium bicarbonate solution removal of impurities oil removing |
| GB2596846A (en) * | 2020-07-09 | 2022-01-12 | Jaguar Land Rover Ltd | Secondary air injection system and control method |
| GB2596846B (en) * | 2020-07-09 | 2023-01-18 | Jaguar Land Rover Ltd | Secondary air injection system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |
|
| CX01 | Expiry of patent term |