CN205330771U - Air assisting atomization urea injection system - Google Patents
Air assisting atomization urea injection system Download PDFInfo
- Publication number
- CN205330771U CN205330771U CN201620118746.7U CN201620118746U CN205330771U CN 205330771 U CN205330771 U CN 205330771U CN 201620118746 U CN201620118746 U CN 201620118746U CN 205330771 U CN205330771 U CN 205330771U
- Authority
- CN
- China
- Prior art keywords
- valve
- air
- gas
- hybrid chamber
- pressure
- 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.)
- Withdrawn - After Issue
Links
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
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides an air assisting atomization urea injection system, which comprises an air source, inside is provided with the balloon pressure jar of urea solution district and gasbag, spray pipe -line system, the gasbag is in proper order through the two -position three way valve, be connected with the air supply gas circuit behind the surge damping valve, the gasbag communicates with each other with the atmosphere behind the two -position three way valve, it includes the metering valve to spray pipe -line system, the nozzle, the hybrid chamber, the nozzle is in proper order through the hybrid chamber, it is connected to distinguish the liquid way with urea solution behind the metering valve, hybrid chamber channel qi in proper order moves the ooff valve, the two -position three way valve, be connected with the air supply gas circuit behind the surge damping valve, the two -position three way valve, equal and the the control unit signal connection of metering valve, in the control process, gasbag inflation pressurizing is given to the air supply to spraying after making the gas mixing in urea and the hybrid chamber, when urea stops to spray, getting into hybrid chamber and nozzle after gaseous channel qi in the air supply moves the ooff valve, sweep spraying pipe -line system, the gas in the gasbag leads to the atmosphere behind the two -position three way valve, to the air bag deflation pressure release. This design is not only with low costs, and system reliability is high moreover.
Description
Technical field
This utility model relates to a kind of carbamide for diesel exhaust aftertreatment and measures jet atomization system, particularly relates to a kind of air-assisted atomized urea spraying system, is primarily adapted for use in reduction system cost and improves system reliability。
Background technology
The carbamide metering jet atomization system of diesel exhaust aftertreatment belongs to internal-combustion engines exhaust gas purifying system, and specifically, it is a kind of SCR (SelectiveCatalystReduction) selective catalytic reduction system operating for reducing diesel engine Nox discharge。
In order to realize carbamide injection, urea liquid is pressurizeed by the commonly used direct current drive membrane pump of existing SCR urea injection system, but adopt direct current drive membrane pump, on the one hand due in automobile and other car and boat electric diaphragm pump be required for by accumulator to its power supply, which increase the loss of accumulator electric energy, on the other hand due to the pressure oscillation of electric diaphragm pump, cause that the Stability and veracity of urea liquid emitted dose is poor。Also there is SCR urea injection system directly to compress urea liquid after filtering with compression air, although so design can solve accumulator electric energy loss problem, but also bring following problem: first, when filtration system breaks down, it is easy to pollute urea liquid；Secondly, the high-pressure gasbag pressurized tank in system is constantly in high pressure conditions when system is run, and it is inconvenient that this makes to add carbamide, and is easily caused the generation potential safety hazard of the maloperation to high-pressure gasbag pressurized tank；Finally, being provided with multiple gas flow electromagnetic valve, and need regularly pneumatic filter to be replaced in system, this can increase the holistic cost of system。
Chinese patent Authorization Notice No. is CN101818675B, authorized announcement date a kind of storage tank pressurizing urea solution metering injection system for diesel vehicle that has been the disclosure of the invention on August 15th, 2012, including fluid reservoir, ejector, air accumulator, first electromagnetic valve, second electromagnetic valve, Venturi tube, blender and control device, blender includes import and relative with import and with inlet communication outlet, ejector is installed in the sidewall of blender, air accumulator connects the second electromagnetic valve and fluid reservoir by the first electromagnetic valve gas circuit respectively, fluid reservoir and ejector fluid connection, second electromagnetic valve gas circuit connects Venturi tube, Venturi tube connects with the airway of blender, control device and electrically connect the first electromagnetic valve, second electromagnetic valve and ejector, also include one-level pressure relief valve, second depressurized valve, liquid level sensor, first temperature sensor, the safety con-trol part such as the first pressure transducer。Though present invention energy-saving safe, it is simple to be integrated in diesel engine vent gas post processing, it yet suffers from following defect:
First, this invention adopts the expensive items such as multiple electromagnetic valves, multiple air relief valve and Venturi tube, and such design adds the initial cost of after-treatment system, too increases the O&M cost of user simultaneously, is unfavorable for the production domesticization of after-treatment system；
Secondly, the gas in this invention air accumulator is directly the urea liquid pressurising in fluid reservoir, and this makes the pollutant existed in gas easily pollute urea liquid, reduces the reliability of system。
Summary of the invention
The purpose of this utility model is to overcome the defect that cost is high, system reliability is low and problem that exist in prior art, it is provided that the air-assisted atomized urea spraying system that a kind of cost is low, system reliability is high。
For realizing object above, technical solution of the present utility model is: a kind of air-assisted atomized urea spraying system, including source of the gas, gasbag pressure tank, injection line system, described source of the gas is connected with gasbag pressure tank gas circuit, gasbag pressure tank is connected with injection line system fluid path, and injection line system is connected with control unit signal；
Described gasbag pressure tank be internally provided with urea liquid district, air bag, urea liquid is provided with air bag in district, air bag is successively through the gas outlet of two position three-way valve, the air inlet of two position three-way valve, it is connected with source of the gas gas circuit after pressure maintaining valve, air bag is successively through the gas outlet of two position three-way valve, with atmosphere after the air vent of two position three-way valve, described injection line system includes metering valve, nozzle, hybrid chamber, nozzle is blended chamber successively, it is connected with urea liquid district fluid path after metering valve, described hybrid chamber is successively through pneumatic on-off valve, gas outlet, air inlet, it is connected with source of the gas gas circuit after pressure maintaining valve, described two position three-way valve, metering valve is all connected with control unit signal。
Being provided with pressure transducer, liquid level sensor, temperature sensor on described gasbag pressure tank, pressure transducer, liquid level sensor, temperature sensor are all connected with control unit signal。
The top of described gasbag pressure tank is provided with increasing liquid mouth, increases and is provided with increasing liquid lid on liquid mouth, and the bottom of gasbag pressure tank is provided with the filter being connected with metering valve fluid path。
Described hybrid chamber be internally provided with the throttle orifice being connected with pneumatic on-off valve gas circuit, hybrid chamber is provided with mixing chamber pressure sensor, mixing chamber pressure sensor is connected with control unit signal。
Described air-assisted atomized urea spraying system also includes SCR postprocessor, and the air inlet of SCR postprocessor is connected with exhaustor gas circuit, and exhaustor is connected with urea liquid district fluid path successively after nozzle, hybrid chamber, metering valve。
Being provided with SCR postprocessor temperature sensor in described SCR postprocessor, SCR postprocessor temperature sensor is connected with control unit signal。
Described source of the gas is high-pressure gas cylinder or air compressor。
Described pressure maintaining valve is electric-controlled type pressure maintaining valve or mechanical type pressure maintaining valve, and when pressure maintaining valve is electric-controlled type pressure maintaining valve, pressure maintaining valve is connected with control unit signal。
Compared with prior art, the beneficial effects of the utility model are:
1, owing to a kind of air-assisted atomized urea spraying system of this utility model being provided with air bag in the urea liquid district of gasbag pressure tank, air bag is successively through two position three-way valve, it is connected with source of the gas gas circuit after pressure maintaining valve, air bag after two position three-way valve with atmosphere, injection line system includes metering valve, nozzle, hybrid chamber, nozzle is blended chamber successively, it is connected with urea liquid district fluid path after metering valve, hybrid chamber is successively through pneumatic on-off valve, two position three-way valve, it is connected with source of the gas gas circuit after pressure maintaining valve, two position three-way valve, metering valve is all connected with control unit signal, such design eliminates the parts of costliness on the one hand, effectively reduce the initial cost of after-treatment system, reduce the O&M cost of user simultaneously, be conducive to the production domesticization of after-treatment system, another aspect employing arranges air bag in gasbag pressure tank and comes to urea liquid pressurising, effectively prevent the pollutant existed in the source of the gas pollution to urea liquid, improve system reliability, the use of the consumptive materials such as pneumatic filter can be saved simultaneously。Therefore, this utility model not only cost is low, and system reliability is high。
2, due in this utility model one air-assisted atomized urea spraying system source of the gas successively through pressure maintaining valve, airbag aeration supercharging is given after two position three-way valve, air bag pressurizes to urea liquid district, the urea liquid in urea liquid district is successively through metering valve, hybrid chamber, spray after nozzle, until when system needs to stop carbamide injection, the urea liquid in urea liquid district stops injection, gas in air bag leads to air after two position three-way valve, air bag is carried out venting pressure release, such design is not only simple in structure, easy to operate, and pass through pressure maintaining valve, air bag is carried out pressurising and pressure release by two position three-way valve, metering valve entrance point pressure can be maintained basicly stable, reduce the inaccuracy of the emitted dose of the metering valve that the injection of urea liquid pressure pulse causes。Therefore, this utility model is not only simple in structure, easy to operate, and improves the Stability and veracity of urea injecting quantity。
3, due in this utility model one air-assisted atomized urea spraying system injection line system include metering valve, nozzle, hybrid chamber, it is connected with urea liquid district fluid path after nozzle blended chamber successively, metering valve, described hybrid chamber is connected with source of the gas gas circuit successively after pneumatic on-off valve, gas outlet, air inlet, pressure maintaining valve, in control process, the urea liquid of the gas and entrance hybrid chamber that enter hybrid chamber sprays into exhaustor through nozzle after mixing, such design can improve carbamide atomization quality, can improve SCR conversion efficiency and can prevent the generation of urea crystals。Therefore, this utility model not only increases carbamide atomization quality, SCR conversion efficiency, and can prevent the generation of urea crystals。
4, owing to this utility model one air-assisted atomized urea spraying system being provided with pressure transducer, liquid level sensor, temperature sensor on gasbag pressure tank, pressure transducer, liquid level sensor, temperature sensor are all connected with control unit signal, control unit controls the switch of pressure maintaining valve, the switch of two position three-way valve, the switch of metering valve and emitted dose according to the signal collected, such design not only increases the reliability of system, and improves the Stability and veracity of urea injecting quantity。Therefore, this utility model not only increases the reliability of system, and improves the Stability and veracity of urea injecting quantity。
5, due in a kind of air-assisted atomized urea spraying system of this utility model hybrid chamber be internally provided with the throttle orifice being connected with pneumatic on-off valve gas circuit, hybrid chamber is provided with mixing chamber pressure sensor, mixing chamber pressure sensor is connected with control unit signal, in control process, the gas flow of hybrid chamber is entered by pressure maintaining valve and orifices controls, and ensure the pressure stability of hybrid chamber to improve the operating accuracy of metering valve, thus improve the Stability and veracity of urea injecting quantity。Therefore, this utility model improves the Stability and veracity of urea injecting quantity。
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model (pressure maintaining valve is electric-controlled type pressure maintaining valve)。
Fig. 2 is structural representation of the present utility model (pressure maintaining valve is mechanical type pressure maintaining valve)。
In figure: source of the gas 1, gasbag pressure tank 2, urea liquid district 21, air bag 22, pressure transducer 23, liquid level sensor 24, temperature sensor 25, increase liquid mouth 26, increase liquid lid 27, filter 28, injection line system 3, metering valve 31, nozzle 32, hybrid chamber 33, throttle orifice 331, mixing chamber pressure sensor 332, control unit 4, pressure maintaining valve 5, two position three-way valve 6, air inlet 61, gas outlet 62, air vent 63, pneumatic on-off valve 7, SCR postprocessor 8, SCR postprocessor temperature sensor 81, exhaustor 82。
Detailed description of the invention
Illustrate with detailed description of the invention, this utility model to be described in further detail below in conjunction with accompanying drawing。
Referring to Fig. 1 to Fig. 2, a kind of air-assisted atomized urea spraying system, including source of the gas 1, gasbag pressure tank 2, injection line system 3, described source of the gas 1 is connected with gasbag pressure tank 2 gas circuit, gasbag pressure tank 2 is connected with injection line system 3 fluid path, and injection line system 3 is connected with control unit 4 signal；
Described gasbag pressure tank 2 be internally provided with urea liquid district 21, air bag 22, urea liquid district 21 is provided with air bag 22, air bag 22 is successively through the gas outlet 62 of two position three-way valve 6, the air inlet 61 of two position three-way valve 6, it is connected with source of the gas 1 gas circuit after pressure maintaining valve 5, air bag 22 is successively through the gas outlet 62 of two position three-way valve 6, with atmosphere after the air vent 63 of two position three-way valve 6, described injection line system 3 includes metering valve 31, nozzle 32, hybrid chamber 33, nozzle 32 is blended chamber 33 successively, it is connected with urea liquid district 21 fluid path after metering valve 31, described hybrid chamber 33 is successively through pneumatic on-off valve 7, gas outlet 62, air inlet 61, it is connected with source of the gas 1 gas circuit after pressure maintaining valve 5, described two position three-way valve 6, metering valve 31 is all connected with control unit 4 signal。
Being provided with pressure transducer 23, liquid level sensor 24, temperature sensor 25 on described gasbag pressure tank 2, pressure transducer 23, liquid level sensor 24, temperature sensor 25 are all connected with control unit 4 signal。
The top of described gasbag pressure tank 2 is provided with increasing liquid mouth 26, increases and is provided with increasing liquid lid 27 on liquid mouth 26, and the bottom of gasbag pressure tank 2 is provided with the filter 28 being connected with metering valve 31 fluid path。
Described hybrid chamber 33 be internally provided with the throttle orifice 331 being connected with pneumatic on-off valve 7 gas circuit, hybrid chamber 33 is provided with mixing chamber pressure sensor 332, mixing chamber pressure sensor 332 is connected with control unit 4 signal。
Described air-assisted atomized urea spraying system also includes SCR postprocessor 8, and the air inlet of SCR postprocessor 8 is connected with exhaustor 82 gas circuit, and exhaustor 82 is connected with urea liquid district 21 fluid path successively after nozzle 32, hybrid chamber 33, metering valve 31。
Being provided with SCR postprocessor temperature sensor 81 in described SCR postprocessor 8, SCR postprocessor temperature sensor 81 is connected with control unit 4 signal。
Described source of the gas 1 is high-pressure gas cylinder or air compressor。
Described pressure maintaining valve 5 is electric-controlled type pressure maintaining valve or mechanical type pressure maintaining valve, and when pressure maintaining valve 5 is electric-controlled type pressure maintaining valve, pressure maintaining valve 5 is connected with control unit 4 signal。
A kind of control method of air-assisted atomized urea spraying system, described control method comprises the following steps:
First connect pressure maintaining valve 5, control two position three-way valve 6 again through control unit 4 to be energized, so that air inlet 61 and gas outlet 62 are connected, then source of the gas 1 is controlled successively through pressure maintaining valve 5, air inlet 61, air bag 22 plenum is given behind gas outlet 62, connect pneumatic on-off valve 7 again, then source of the gas 1 is controlled successively through pressure maintaining valve 5, air inlet 61, gas outlet 62, pneumatic on-off valve 7, hybrid chamber 33, spray after nozzle 32, when system needs injection urea liquid, control metering valve 31 again through control unit 4 to connect, now, air bag 22 pressurizes to urea liquid district 21, the urea liquid in urea liquid district 21 mixes with the gas in hybrid chamber 33 after metering valve 31, the gas solution of mixing sprays after nozzle 32, until when system needs to stop carbamide injection, then pass through control unit 4 to control metering valve 31 and close, now, the urea liquid in urea liquid district 21 stops entering hybrid chamber 33, gas in source of the gas 1 enters hybrid chamber 33 and nozzle 32 after pneumatic on-off valve 7, so that injection line system 3 is purged, two position three-way valve 6 power-off is controlled again through control unit 4, now, gas outlet 62 and air vent 63 are connected, gas in air bag 22 is successively through gas outlet 62, air is led to after air vent 63, air bag 22 is carried out venting pressure release, now, described control method terminates。
Described hybrid chamber 33 be internally provided with the throttle orifice 331 being connected with pneumatic on-off valve 7 gas circuit；
Described air-assisted atomized urea spraying system also includes SCR postprocessor 8, and the air inlet of SCR postprocessor 8 is connected with exhaustor 82 gas circuit, and exhaustor 82 is connected with urea liquid district 21 fluid path successively after nozzle 32, hybrid chamber 33, metering valve 31；
Described control source of the gas 1 sprays after pressure maintaining valve 5, air inlet 61, gas outlet 62, pneumatic on-off valve 7, hybrid chamber 33, nozzle 32 successively and refers to: controls source of the gas 1 and sprays into exhaustor 82 after pressure maintaining valve 5, air inlet 61, gas outlet 62, pneumatic on-off valve 7, throttle orifice 331, hybrid chamber 33, nozzle 32 successively；
The urea liquid in described urea liquid district 21 mixes with the gas in hybrid chamber 33 after metering valve 31, the gas solution of mixing sprays after nozzle 32 and refers to: the urea liquid in urea liquid district 21 mixes with the gas in hybrid chamber 33 after metering valve 31, and the gas solution of mixing sprays to exhaustor 82 after nozzle 32。
Principle of the present utility model illustrates as follows:
1, source of the gas 1: referring to Fig. 1 to Fig. 2, source of the gas 1 can be mini air compressor, it can also be air storage tank, wherein the outlet pressure of mini air compressor is usually 0.8Mpa 1Mpa, both sources of the gas are applicable to various car and boat, for adopting the automobile of pneumatic brake, it is also possible to utilize original air compressor machine and air accumulator as source of the gas 1。
2, pressure maintaining valve 5: referring to Fig. 1 to Fig. 2, the gas of source of the gas 1 is after pressure maintaining valve 5, become the gas of stable gas pressure, pressure maintaining valve 5 whether electric-controlled type pressure maintaining valve or mechanical type pressure maintaining valve, its gas outlet pressure limit is 0.5Mpa 0.9Mpa, can be set as one of them value of 0.5Mpa 0.9Mpa as required。
3, two position three-way valve 6: referring to Fig. 1 to Fig. 2, three gas inlet and outlet joints, an electrical connector is had in two position three-way valve 6, wherein three gas inlet and outlet joint respectively 62, one, 61, gas outlet of air inlet air vents 63, electrical connector is connected with control unit 4 signal。
When two position three-way valve 6 is energized, air inlet 61 and gas outlet 62 are connected, and source of the gas 1 gives air bag 22 plenum of gasbag pressure tank 2 successively behind pressure maintaining valve 5, air inlet 61, gas outlet 62；When two position three-way valve 6 no power, gas outlet 62 and air vent 63 are connected, air bag 22 successively after gas outlet 62, air vent 63 with atmosphere, with pressure release that air bag 22 is exitted。
4, gasbag pressure tank 2: referring to Fig. 1 to Fig. 2, gasbag pressure tank 2 be internally provided with urea liquid district 21, air bag 22, urea liquid district 21 is provided with air bag 22, gasbag pressure tank 2 is pressure vessel, pressure, the operating pressure of gasbag pressure tank 2 is provided to be 0.5Mpa 1.2Mpa to the air bag 22 in gasbag pressure tank 2 by source of the gas 1。
Being provided with pressure transducer 23, liquid level sensor 24, temperature sensor 25 on described gasbag pressure tank 2, pressure transducer 23, liquid level sensor 24, temperature sensor 25 are all connected with control unit 4 signal；Pressure transducer 23 is measured the pressure of urea liquid and feeds back to control unit 4, and liquid level sensor 24 is measured the liquid level of urea liquid and feeds back to control unit 4, and temperature sensor 25 is measured the temperature of urea liquid and feeds back to control unit 4。
The top of described gasbag pressure tank 2 is provided with increasing liquid mouth 26, increases and is provided with increasing liquid lid 27 on liquid mouth 26, increases liquid mouth 26 for increasing urea liquid in gasbag pressure tank 2, increases liquid lid 27 and is used for preventing introduced contaminants from entering in gasbag pressure tank 2；The bottom of gasbag pressure tank 2 is provided with the filter 28 being connected with metering valve 31 fluid path, and filter 28 is for preventing the impurity in urea liquid from entering in metering valve 31。
5, metering valve 31: referring to Fig. 1 to Fig. 2, the keying of metering valve 31 is controlled by control unit 4, control unit 4 regulates according to the operating condition of electromotor and running environment etc. and determines, controlling metering valve 31 by control signal to work, control unit 4 determines the emitted dose of urea liquid by controlling the opening time of metering valve 31。
6, pneumatic on-off valve 7: referring to Fig. 1 to Fig. 2, described hybrid chamber 33 is connected with gas outlet 62 gas circuit after pneumatic on-off valve 7, and in control process, when pressure reaches certain value, gas pressure backs down pneumatic on-off valve 7；When the urea liquid in urea liquid district 21 stops entering hybrid chamber 33, gas in source of the gas 1 enters hybrid chamber 33 and nozzle 32 after pneumatic on-off valve 7, residual urine cellulose solution in injection line system 3 is purged, it is prevented that injection line system 3 is produced Crystallization Plugging with nozzle by urea liquid。
7, hybrid chamber 33: referring to Fig. 1 to Fig. 2, described hybrid chamber 33 is successively through pneumatic on-off valve 7, gas outlet 62, air inlet 61, it is connected with source of the gas 1 gas circuit after pressure maintaining valve 5, hybrid chamber 33 is successively through metering valve 31, it is connected with urea liquid district 21 fluid path after filter 28, in control process, gas in source of the gas 1 is successively through pressure maintaining valve 5, air inlet 61, gas outlet 62, hybrid chamber 33 is entered after pneumatic on-off valve 7, the urea liquid in urea liquid district 21 sequentially passes through filter 28, metering valve 31 enters hybrid chamber 33, the urea liquid of the gas and entrance hybrid chamber 33 that enter hybrid chamber 33 sprays in exhaustor 82 after mixing after nozzle 32。
Described hybrid chamber 33 be internally provided with the throttle orifice 331 being connected with pneumatic on-off valve 7 gas circuit, throttle orifice 331 is for controlling to enter the gas flow of hybrid chamber 33；Being provided with mixing chamber pressure sensor 332 on hybrid chamber 33, mixing chamber pressure sensor 332 is connected with control unit 4 signal, and mixing chamber pressure sensor 332 is measured the pressure of hybrid chamber 33 and feeds back to control unit 4。
8, control unit 4: referring to Fig. 1 to Fig. 2, the input signal of described control unit 4 be pressure transducer 23, liquid level sensor 24, temperature sensor 25, mixing chamber pressure sensor 332, the output signal of SCR postprocessor temperature sensor 81 and electromotor record oil temperature, water temperature, load, the various signals such as rotating speed, and exported corresponding control signal by control unit 4 according to the program set and control the switch of the switch of pressure maintaining valve 5, switch and the emitted dose of metering valve 31, two position three-way valve 6, judge that whether system is normal simultaneously。
9, referring to Fig. 1 to Fig. 2, urea liquid in gasbag pressure tank 2, under the effect of air bag 22 pressure, urea liquid is through filter 28, metering valve 31, hybrid chamber 33, nozzle 32, under the control of control unit 4, quantitative urea liquid is sprayed in exhaustor 82, urea liquid generates ammonia through pyrolysis and hydrolysis at a certain temperature, and the NOx emission in aerofluxus is reduced to nitrogen by ammonia under catalyst action in SCR postprocessor 8, reduces the effect of NOx in aerofluxus。
Embodiment 1:
Referring to Fig. 1 to Fig. 2, a kind of air-assisted atomized urea spraying system, including source of the gas 1, gasbag pressure tank 2, injection line system 3, described source of the gas 1 is connected with gasbag pressure tank 2 gas circuit, and gasbag pressure tank 2 is connected with injection line system 3 fluid path, and injection line system 3 is connected with control unit 4 signal, described gasbag pressure tank 2 be internally provided with urea liquid district 21, air bag 22, urea liquid district 21 is provided with air bag 22, and air bag 22 is successively through the gas outlet 62 of two position three-way valve 6, the air inlet 61 of two position three-way valve 6, being connected with source of the gas 1 gas circuit after pressure maintaining valve 5, air bag 22 is successively through the gas outlet 62 of two position three-way valve 6, with atmosphere after the air vent 63 of two position three-way valve 6, described injection line system 3 includes metering valve 31, nozzle 32, hybrid chamber 33, nozzle 32 is blended chamber 33 successively, being connected with urea liquid district 21 fluid path after metering valve 31, described hybrid chamber 33 is successively through pneumatic on-off valve 7, gas outlet 62, air inlet 61, it is connected with source of the gas 1 gas circuit after pressure maintaining valve 5, described two position three-way valve 6, metering valve 31 is all connected with control unit 4 signal。
By such scheme, a kind of control method of air-assisted atomized urea spraying system, described control method comprises the following steps: first connect pressure maintaining valve 5, control two position three-way valve 6 again through control unit 4 to be energized, so that air inlet 61 and gas outlet 62 are connected, then source of the gas 1 is controlled successively through pressure maintaining valve 5, air inlet 61, air bag 22 plenum is given behind gas outlet 62, connect pneumatic on-off valve 7 again, then source of the gas 1 is controlled successively through pressure maintaining valve 5, air inlet 61, gas outlet 62, pneumatic on-off valve 7, hybrid chamber 33, spray after nozzle 32, when system needs injection urea liquid, control metering valve 31 again through control unit 4 to connect, now, air bag 22 pressurizes to urea liquid district 21, the urea liquid in urea liquid district 21 mixes with the gas in hybrid chamber 33 after metering valve 31, the gas solution of mixing sprays after nozzle 32, until when system needs to stop carbamide injection, then pass through control unit 4 to control metering valve 31 and close, now, the urea liquid in urea liquid district 21 stops entering hybrid chamber 33, gas in source of the gas 1 enters hybrid chamber 33 and nozzle 32 after pneumatic on-off valve 7, so that injection line system 3 is purged, two position three-way valve 6 power-off is controlled again through control unit 4, now, gas outlet 62 and air vent 63 are connected, gas in air bag 22 is successively through gas outlet 62, air is led to after air vent 63, air bag 22 is carried out venting pressure release, now, described control method terminates。
Embodiment 2:
Substance, with embodiment 1, is different in that:
Referring to Fig. 1 to Fig. 2, described gasbag pressure tank 2 being provided with pressure transducer 23, liquid level sensor 24, temperature sensor 25, pressure transducer 23, liquid level sensor 24, temperature sensor 25 are all connected with control unit 4 signal；The top of described gasbag pressure tank 2 is provided with increasing liquid mouth 26, increases and is provided with increasing liquid lid 27 on liquid mouth 26, and the bottom of gasbag pressure tank 2 is provided with the filter 28 being connected with metering valve 31 fluid path。
Embodiment 3:
Substance, with embodiment 1, is different in that:
Referring to Fig. 1 to Fig. 2, described hybrid chamber 33 be internally provided with the throttle orifice 331 being connected with pneumatic on-off valve 7 gas circuit, hybrid chamber 33 is provided with mixing chamber pressure sensor 332, mixing chamber pressure sensor 332 is connected with control unit 4 signal；Described air-assisted atomized urea spraying system also includes SCR postprocessor 8, the air inlet of SCR postprocessor 8 is connected with exhaustor 82 gas circuit, exhaustor 82 is connected with urea liquid district 21 fluid path successively after nozzle 32, hybrid chamber 33, metering valve 31, being provided with SCR postprocessor temperature sensor 81 in described SCR postprocessor 8, SCR postprocessor temperature sensor 81 is connected with control unit 4 signal。
Described control source of the gas 1 sprays after pressure maintaining valve 5, air inlet 61, gas outlet 62, pneumatic on-off valve 7, hybrid chamber 33, nozzle 32 successively and refers to: controls source of the gas 1 and sprays into exhaustor 82 after pressure maintaining valve 5, air inlet 61, gas outlet 62, pneumatic on-off valve 7, throttle orifice 331, hybrid chamber 33, nozzle 32 successively；The urea liquid in described urea liquid district 21 mixes with the gas in hybrid chamber 33 after metering valve 31, the gas solution of mixing sprays after nozzle 32 and refers to: the urea liquid in urea liquid district 21 mixes with the gas in hybrid chamber 33 after metering valve 31, and the gas solution of mixing sprays to exhaustor 82 after nozzle 32。
Embodiment 4:
Substance, with embodiment 1, is different in that:
Referring to Fig. 1 to Fig. 2, described source of the gas 1 is high-pressure gas cylinder or air compressor；Described pressure maintaining valve 5 is electric-controlled type pressure maintaining valve or mechanical type pressure maintaining valve, and when pressure maintaining valve 5 is electric-controlled type pressure maintaining valve, pressure maintaining valve 5 is connected with control unit 4 signal。
Claims (8)
1. an air-assisted atomized urea spraying system, including source of the gas (1), gasbag pressure tank (2), injection line system (3), described source of the gas (1) is connected with gasbag pressure tank (2) gas circuit, gasbag pressure tank (2) is connected with injection line system (3) fluid path, injection line system (3) is connected with control unit (4) signal, it is characterised in that:
Described gasbag pressure tank (2) be internally provided with urea liquid district (21), air bag (22), urea liquid district (21) is provided with air bag (22), air bag (22) is successively through the gas outlet (62) of two position three-way valve (6), the air inlet (61) of two position three-way valve (6), pressure maintaining valve (5) is connected with source of the gas (1) gas circuit afterwards, air bag (22) is successively through the gas outlet (62) of two position three-way valve (6), the air vent (63) of two position three-way valve (6) is afterwards and atmosphere, described injection line system (3) includes metering valve (31), nozzle (32), hybrid chamber (33), nozzle (32) blended chamber (33) successively, metering valve (31) is connected with urea liquid district (21) fluid path afterwards, described hybrid chamber (33) is successively through pneumatic on-off valve (7), gas outlet (62), air inlet (61), pressure maintaining valve (5) is connected with source of the gas (1) gas circuit afterwards, described two position three-way valve (6), metering valve (31) is all connected with control unit (4) signal。
2. a kind of air-assisted atomized urea spraying system according to claim 1, it is characterized in that: being provided with pressure transducer (23), liquid level sensor (24), temperature sensor (25) on described gasbag pressure tank (2), pressure transducer (23), liquid level sensor (24), temperature sensor (25) are all connected with control unit (4) signal。
3. a kind of air-assisted atomized urea spraying system according to claim 1, it is characterized in that: the top of described gasbag pressure tank (2) is provided with increasing liquid mouth (26), increasing and be provided with increasing liquid lid (27) on liquid mouth (26), the bottom of gasbag pressure tank (2) is provided with the filter (28) being connected with metering valve (31) fluid path。
4. a kind of air-assisted atomized urea spraying system according to claim 1, it is characterized in that: described hybrid chamber (33) be internally provided with the throttle orifice (331) being connected with pneumatic on-off valve (7) gas circuit, being provided with mixing chamber pressure sensor (332) on hybrid chamber (33), mixing chamber pressure sensor (332) is connected with control unit (4) signal。
5. a kind of air-assisted atomized urea spraying system according to claim 1, it is characterized in that: described air-assisted atomized urea spraying system also includes SCR postprocessor (8), the air inlet of SCR postprocessor (8) is connected with exhaustor (82) gas circuit, and exhaustor (82) is connected with urea liquid district (21) fluid path successively after nozzle (32), hybrid chamber (33), metering valve (31)。
6. a kind of air-assisted atomized urea spraying system according to claim 5, it is characterized in that: being provided with SCR postprocessor temperature sensor (81) in described SCR postprocessor (8), SCR postprocessor temperature sensor (81) is connected with control unit (4) signal。
7. a kind of air-assisted atomized urea spraying system according to any one in claim 1-6, it is characterised in that: described source of the gas (1) is high-pressure gas cylinder or air compressor。
8. a kind of air-assisted atomized urea spraying system according to any one in claim 1-6, it is characterized in that: described pressure maintaining valve (5) is electric-controlled type pressure maintaining valve or mechanical type pressure maintaining valve, when pressure maintaining valve (5) is for electric-controlled type pressure maintaining valve, pressure maintaining valve (5) is connected with control unit (4) signal。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620118746.7U CN205330771U (en) | 2016-02-05 | 2016-02-05 | Air assisting atomization urea injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620118746.7U CN205330771U (en) | 2016-02-05 | 2016-02-05 | Air assisting atomization urea injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205330771U true CN205330771U (en) | 2016-06-22 |
Family
ID=56317253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620118746.7U Withdrawn - After Issue CN205330771U (en) | 2016-02-05 | 2016-02-05 | Air assisting atomization urea injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205330771U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545422A (en) * | 2016-02-05 | 2016-05-04 | 东风商用车有限公司 | Air-assisting atomized urea spraying system and control method thereof |
| CN106111376A (en) * | 2016-07-06 | 2016-11-16 | 南京利德东方橡塑科技有限公司 | A kind of spray ethanol device and control method thereof automatically |
| CN110215823A (en) * | 2019-06-03 | 2019-09-10 | 彩虹集团新能源股份有限公司 | A kind of equipment reducing nitrous oxides concentration in glass furnace fume discharge |
| CN111894706A (en) * | 2020-07-24 | 2020-11-06 | 东风商用车有限公司 | Common rail type valve group controlled urea injection system and control method thereof |
-
2016
- 2016-02-05 CN CN201620118746.7U patent/CN205330771U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545422A (en) * | 2016-02-05 | 2016-05-04 | 东风商用车有限公司 | Air-assisting atomized urea spraying system and control method thereof |
| CN105545422B (en) * | 2016-02-05 | 2018-01-30 | 东风商用车有限公司 | A kind of air-assisted atomized urea spraying system and its control method |
| CN106111376A (en) * | 2016-07-06 | 2016-11-16 | 南京利德东方橡塑科技有限公司 | A kind of spray ethanol device and control method thereof automatically |
| CN106111376B (en) * | 2016-07-06 | 2019-01-18 | 南京利德东方橡塑科技有限公司 | A kind of spray alcohol device and its control method automatically |
| CN110215823A (en) * | 2019-06-03 | 2019-09-10 | 彩虹集团新能源股份有限公司 | A kind of equipment reducing nitrous oxides concentration in glass furnace fume discharge |
| CN111894706A (en) * | 2020-07-24 | 2020-11-06 | 东风商用车有限公司 | Common rail type valve group controlled urea injection system and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105545423A (en) | Urea jet system without air-assisted atomization and control method of atomized urea jet system | |
| CN205330771U (en) | Air assisting atomization urea injection system | |
| CN105545422B (en) | A kind of air-assisted atomized urea spraying system and its control method | |
| CN204609994U (en) | A kind of air-assisted SCR urea injection system | |
| CN102979604B (en) | Reducing agent spraying and metering device | |
| CN103511039A (en) | Pneumatic type urea injection system | |
| CN102269031B (en) | Universal type selective catalytic reduction (SCR) injection system | |
| WO2015154640A1 (en) | Scr injection metering module and control method | |
| CN103437868A (en) | Ammonia gas preparation and fixed quantification injection system for SCR reaction | |
| CN103046989A (en) | Plug-and-play urea spraying control method and system | |
| CN105822394A (en) | Gas-liquid mixing type engine exhaust after-treatment jet apparatus | |
| CN103912348A (en) | Electric heating ammonium bicarbonate dry ammonium preparation and measured spraying system | |
| CN212671898U (en) | Diesel engine tail gas treatment system with closed-loop control | |
| CN205330770U (en) | No air assisting atomization urea injection system | |
| CN102251832B (en) | Liquid heating type metering jet pump in SCR (selective catalytic reduction) system | |
| CN103437867A (en) | Aerodynamic ammonia gas preparation and quantitative injection system | |
| CN103114896B (en) | Urea solution metering injector and control method thereof | |
| CN203532017U (en) | Aerodynamic ammonia gas manufacturing and quantitative injection system | |
| CN107420164B (en) | Urea injection system with external urea nozzle air cooling branch and use method | |
| CN201666176U (en) | Liquid storage tank pressurizing urea solution metering injection system for diesel vehicle | |
| CN203130208U (en) | Diesel engine selective catalyst reduction injection system | |
| CN203035321U (en) | Plug and play urea ejecting control system | |
| CN203499777U (en) | Pneumatic urea injection system | |
| CN106285854A (en) | A kind of SCR liquid injection apparatus | |
| CN203891980U (en) | Air-assisted urea supply device for diesel engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160622 Effective date of abandoning: 20180130 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160622 Effective date of abandoning: 20180130 |