CN102733912A - Post-processing control unit of active matter ammonia storage and supply in pump auxiliary afterheat manner - Google Patents
Post-processing control unit of active matter ammonia storage and supply in pump auxiliary afterheat manner Download PDFInfo
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- CN102733912A CN102733912A CN2012102201792A CN201210220179A CN102733912A CN 102733912 A CN102733912 A CN 102733912A CN 2012102201792 A CN2012102201792 A CN 2012102201792A CN 201210220179 A CN201210220179 A CN 201210220179A CN 102733912 A CN102733912 A CN 102733912A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention relates to a post-processing control unit of active matter ammonia storage and supply in a pump auxiliary afterheat manner, which is characterized in that an electronic control unit is connected with a solenoid valve, a gas conveying pump and a proportional valve through a signal harness; a tail gas inlet temperature sensor, an NOX sensor, a pressure sensor and a withstand voltage tank temperature sensor are connected with the signal input end of the electronic control unit through a signal line; an anti-freezing liquid conveying pipe passes through the inside of a withstand voltage tank; a solid ammonia storage material is filled in the withstand voltage tank; an air filter is positioned at the gas outlet end of the withstand voltage tank; the induction end of the withstand voltage tank temperature sensor is inserted into the solid ammonia storage material; the induction end of the pressure sensor is positioned in the withstand voltage tank and is not in contact with the solid ammonia storage material; the air filter is connected with a reducing agent conduit through a reducing gas conveying pipe; a spray nozzle of the reducing agent conduit is inserted into a pipeline of a tail gas inlet pipe; and the gas outlet end of an SCR (Selective Catalytic Reduction) postprocessor is connected with a tail gas exhaust pipe; and the tail gas inlet temperature sensor and the NOX sensor are connected with the tail gas inlet pipe, and the induction ends of the tail gas inlet temperature sensor and the NOX sensor are positioned in the pipeline of the tail gas inlet pipe. The system has the characteristic of flexibility, can satisfy the emission control target in the low-temperature cold start of a vehicle, is low in price, high in reliability and convenient in use, is used for an SCR national level-4 system or above, can also be used for an FCEV (Fuel Cell Electric Vehicle) system and satisfies the application demands of the future automobile industry.
Description
Technical field
The active matter storage ammonia that the present invention relates to the auxiliary waste heat mode of a kind of pump supplies the reprocessing control unit of ammonia, is applied to the SCR reprocessing industry of vehicle exhaust, also is applicable to the FCEV energy-storage system of fuel cell.
Background technique
Current, the whole world faces the comprehensive challenge of the energy and environment.Aspect the technological means selection of the emission compliance of orthodox car, people still face many difficult problems, for example, how to select the aspects such as technical approach of reprocessing.
SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique is traditional post-processing technology.The essence of the traditional SCR technology of this employing liquid area is to utilize urea at high temperature to decomposite ammonia, under the comprehensive function of catalyzer and temperature, reacts the nontoxic N of generation under the desirable operating mode as ammonia and the NOX in the engine exhaust of reducing agent
2And H
2O, thus reach the purpose of purification.
Traditional SCR has lot of advantages, for example, can in the scope of delivery temperature 250 ~ 550oC, have 50 ~ 85% NOX removal efficient, and can effectively reduce the emission level of PM; Traditional SCR can easily satisfy Europe 4 and Europe 5 levels, also has the potentiality that reach Europe 6 levels; Reach traditional SCR technology that adopt in Europe 4 at present, the fuel oil consumption of motor can reduce by 3 ~ 6%; Traditional SCR catalyzer does not contain precious metal, and is more relatively low than cost; Traditional SCR is to the quality of fuel oil for vehicles, and particularly Sulpher content is insensitive.Based on above analysis, traditional SCR post-processing technology also relatively is fit to the vehicle condition and the fuel oil for vehicles situation of China.
If apply traditional vehicle-mounted SCR post-processing technology, must resolve carrier, catalyzer, carbamide reducing agent and add the dosage of supply network, carbamide reducing agent, the vital technological difficulties such as atomized spray, SCR catalyzer conversion efficiency, ammonia amount of leakage and system matches of carbamide reducing agent in China.
The upgrading each time of automobile emission standard all produces such or such shock effect to automobile industry.State's 4 standards Schedule of repeatedly postponing enforcement of China is not only the nonsynchronous sole cause of standard of fuel, also faces the problem of service facility construction of the carbamide reducing agent socialization of the supporting system of complicated social and liquid; For example, behind state's 4 standard implementations, can traditional required ECU (control unit) and DCU (batching unit) of running of SCR system be caused the demand immediately; Consider that present automatical control systems such as vehicle-mounted ECU all are imported products, the DCU of domestic enterprise's independent development is difficult to carry out with it the communication coupling, otherwise; If the employing import article of ECU and DCU system 100%; Not only price is very high, and the user is difficult to accept, and has source of goods problem at full stretch; Also face the complicated after sales service technology and the problem of cost, restricted the development and progress of whole automobile industry.In addition, the used liquid area reducing agent of traditional SCR system faces freezed in winter and is incubated the problem of thawing, and this has also caused the traditional SCR system complex and the reason of poor stability.
Therefore, how obtaining low cost and high performance after-treatment system is the core content that advances this art progress.Inorganic salts can be used as the good choice of technology of following SCR system to the ammonia adsorption-desorption characteristics.
Some salts of technical grade; For example, chloride and their mixtures such as strontium chloride, magnesium chloride or calcium chloride, the system that is used with ammonia; Be the heat absorption and the exothermic phenomenon of the adsorption-desorption process of above-mentioned chloride and ammonia, the refrigeration system of the ripe large cold storage that is applied to industry.
It is the general principles of chemistry that above-mentioned anhydrous chloride and ammonia carry out chemisorption; The chloride of a molecule can adsorb the ammonia of 6 ~ 8 molecules in theory; Form stable complex compound, ammonia is deviate from during heating, along with going deep into of research; It is found that the adsorption-desorption model of these chlorides and ammonia and the principles of chemistry can be applied to the SCR system of motor vehicle tail-gas purifying fully.
In the national patent Information Network; With the storage ammonia word and search that is the theme, the patent No. is that ' a kind of urotropine by using gas phase method tail gas ammonia recovery unit ', the patent No. of CN201120099229.7 is that ' be used for freezer machine room join ammonia bindiny mechanism ' and the patent No. of CN201020677361.7 is the characteristic component that ' complex function type stores up the ammonia device ' of CN201020269811.9 do not relate to the present invention.The patent No. is that CN200520057558.X's the patent of ' a kind of ammonia steaming device ' is a kind of the ammonia nitrogen industrial wastewater to be carried out the environment protection treating device that ammonia nitrogen is got rid of processing, does not also relate to the characteristic component among the present invention.Uncorrelated with the present invention.
The patent No. is that CN201010244091.5's ' be used for method and system that the work of SCR catalyzer is tested ' and the patent No. is that 2 inventions of CN200880104697.X ' operation method of SCR exhaust after treatment system and diagnostic method ' provide a kind of SCR (SCR) catalytic converter and traditional liquid ureaclastic ammonia dispensing module and control system of being used for, and does not relate to characteristic component of the present invention.
The patent No. is that CN200910197860.8's the invention of ' a kind of preparation method of efficient low-temperature ammonia-storing material ' is applied to the SCR after-treatment system, and characteristic is to adopt amino borane ammino-complex ammonia BH3 (NH3) n (n=1 ~ 3); The maximum storage of room temperature ammonia amount can reach 62.4wt%, still, considers costing an arm and a leg of amino borane, has higher blast and burning grade, is not suitable for applying in enormous quantities of general industry field.
The patent No. is that CN200580026626.9's the invention of ' storage and carry the solid material of ammonia ' relates to storage and carries the solid material of ammonia.The solid material of this storage ammonia comprises M
a(NH3)
nX
zIonic salt, through the direct high-pressure molding of mould, for example, process cylinder to salt solid material, be arranged in a lot of this cylinders together then.The disadvantage of this patent is that cylinder is too closely knit; The saturated absorption of carrying out ammonia after each ammonia desorb is accomplished again needs for a long time, and for example 4 ~ 6 hours, efficient was very low; This becomes the reason that limits its application for the SCR storage ammonia system inconvenience of using on the automobile very.
The patent No. be CN200580009219.7's ' purposes of ammonia storage device in energy production ', this invention relates to a kind of generator unit, comprising general formula is M
a(NH3)
NXzAmmonia absorb and discharge salt, this patent mainly is applicable to fuel cell system.In the claim 4 of this patent, mentioned property material and be such salt or be positioned on the porous carrier materials, which kind of porous material statement is not, and those skilled in the art can't be implemented.
The patent No. be CN200710156866.1's ' a kind of amido complex compound ' disclosure of the Invention a kind of amido complex compound.The composition of this amido complex compound is MX
m(NH3)
n, this invention is to the separation of ammonia in the used circulating air of ammonia synthesis process.Claim only relates to the preparation process of this ammonobase complex compound.
The patent No. is solid ammonia storage and the conveying material that CN200680005886.2's the patent of the high density of the ammonia ' storage ' comprises ammonia absorptions/desorb solid material; The said density that has been compacted to is greater than 50% storage of theoretical skeletal density with carry material that the solid ammonia storage medium is provided; The described metal salt solid material of this patent also is direct compression molding; Bond has been adopted in statement, has only stated it possibly is to have adopted the silicon dioxide fibre Bond, does not also have the dosage ratio; Do not offer some clarification on the thin item of the composition that other adopted, the professional and technical personnel almost can't implement.
The retrieval and the analysis of above-mentioned patent show, adsorbs and resolve ammonia with activity storage ammoniate, formed the after-treatment system of on vehicle, using and also do not appeared in the newspapers.
Summary of the invention
The object of the present invention is to provide the reprocessing control unit of the active matter storage ammonia confession ammonia of the auxiliary waste heat mode of a kind of pump, its composition that has adopted active material, porous material and Bond composition is as the carrier that stores up ammonia and put ammonia; The waste heat of engine coolant heats, and relies on control unit and one group of solenoid valve or Proportional valve, realizes that the SCR after-treatment system is carried and imported easily to the dosage of ammonia, realizes the removal to NOX; Simplified system improves reliability, also significantly reduces cost, and eliminates the obstacle that large-scale industry is applied.
Technological scheme of the present invention is achieved in that the active matter storage ammonia of the auxiliary waste heat mode of a kind of pump supplies the reprocessing control unit of ammonia; Form by motor, antifreeze liquid delivery pipe, solenoid valve, autoclave, solid ammonia-storing material, air filter, charging hole, pressure transducer, subsequent use pipe valve, autoclave temperature transducer, reducing gas delivery pipe, electronic control unit, Proportional valve, gas inlet temperature transducer, NOX sensor, reducing agent conduit, tail gas entering pipe, exhaust emission tube, SCR preprocessor, gas transfer pump; It is characterized in that: electronic control unit connects solenoid valve, gas transfer pump, Proportional valve through the signal wire harness; Gas inlet temperature transducer, NOX sensor, pressure transducer, autoclave temperature transducer connect the signal input part of electronic control unit through signaling line; Antifreeze liquid delivery pipe and engine antif liquid systems serial or parallel connection; The antifreeze liquid delivery pipe passes autoclave inside; The antifreeze liquid delivery pipe is positioned at the inner pipeline of autoclave and is the coil pipe distribution, and solenoid valve is positioned on the antifreeze liquid delivery pipe, fills the solid ammonia-storing material in the autoclave; Loading is 40% of a tank body volume capacity; Air filter, charging hole, pressure transducer, subsequent use pipe valve, autoclave temperature transducer are arranged on the autoclave, and wherein air filter is positioned at the outlet side of autoclave, and the induction end of autoclave temperature transducer is inserted in the solid ammonia-storing material; The induction end of pressure transducer is positioned at autoclave but does not contact the solid ammonia-storing material; Air filter is connected with the reducing agent conduit through the reducing gas delivery pipe, and the reducing agent catheter nozzle inserts tail gas and gets in the pipe pipeline, proportional valve, gas transfer pump on the reducing gas delivery pipe pipeline; Tail gas gets into pipe and connects SCR preprocessor inlet end; SCR preprocessor outlet side connects exhaust emission tube, and gas inlet temperature transducer, NOX sensor are connected tail gas and get on the pipe, and its induction end is positioned at tail gas and gets into the pipe pipeline.
The thickness of described autoclave tank body is 4 ~ 5mm, and is cylindrical, tank interior thermal spraying one deck nylon thermal insulation layer.
The preparation and the filling method of described solid ammonia-storing material are following: adopt 58 parts of industrial anhydrous magnesium chlorides by weight; 2 parts of expanded graphites, 15 parts of deionized waters, 15 parts of 10 parts of industrial alcohols and industrial ball clays; Above-mentioned material adopts the dough mixing machine of machinery to mix the powder that evenly becomes hygrometric state; Incorporation time 5 ~ 15min, mixture is filled in the autoclave through the charging hole on the autoclave, adopts this withstand voltage tank body 5 ~ 10min of method concussion of machinery concussion; Remove air clearance wherein, feeding quantity causes 40% of tank body volume capacity; Whole tank body is put into vacuum drying cabinet, begins heating, average 5 ℃/10min from 25 ℃ of room temperatures under the normal pressure; Be warmed up to 70 ℃, charging hole opens wide discharge water steam and alcohol steam, and 70 ℃ keep 30min; Under this temperature, start vacuum pump then; Progressively vacuumize, divide to make degree of vacuum reach 550mabr three times heat-insulation pressure keeping 30min.
Described anhydrous magnesium chloride also can adopt other inorganic salts that can form complex compound to substitute, can be strontium chloride, nickel chloride, copper chloride or calcium chloride etc. can and NH3 form the chloride of complex compound.
Good effect of the present invention is that service time was long, has sufficient practicability, Economy and advance after system's completion was once filled ammonia; This technology is used on vehicle-mounted SCR has realistic meanings.
Description of drawings
Fig. 1 is an accompanying drawing of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further: as shown in Figure 1; The active matter storage ammonia of the auxiliary waste heat mode of a kind of pump supplies the reprocessing control unit of ammonia; Form by motor 1, antifreeze liquid delivery pipe 2, solenoid valve 3, autoclave 4, solid ammonia-storing material 5, air filter 6, charging hole 7, pressure transducer 8, subsequent use pipe valve 9, autoclave temperature transducer 10, reducing gas delivery pipe 11, electronic control unit 12, Proportional valve 13, gas inlet temperature transducer 14, NOX sensor 15, reducing agent conduit 16, tail gas entering pipe 17, exhaust emission tube 18, SCR preprocessor 19, gas transfer pump 20; It is characterized in that: electronic control unit 12 connects solenoid valve 3, gas transfer pump 20, Proportional valve 13 through the signal wire harness; Gas inlet temperature transducer 14, NOX sensor 15, pressure transducer 8, autoclave temperature transducer 10 connect the signal input part of electronic control unit 12 through signaling line; Antifreeze liquid delivery pipe 2 and motor 1 antifreeze liquid system serial or parallel connection; Antifreeze liquid delivery pipe 2 passes autoclave 4 inside; Antifreeze liquid delivery pipe 2 is positioned at autoclave 4 inner pipelines and is the coil pipe distribution, and solenoid valve 3 is positioned on the antifreeze liquid delivery pipe 2, fills solid ammonia-storing materials 5 in the autoclave 4; Loading is 40% of a tank body volume capacity; Air filter 6, charging hole 7, pressure transducer 8, subsequent use pipe valve 9, autoclave temperature transducer 10 are arranged on the autoclave 4, and wherein air filter 6 is positioned at the outlet side of autoclave 4, and the induction end of autoclave temperature transducer 10 is inserted in the solid ammonia-storing material 5; The induction end of pressure transducer 8 is positioned at autoclave 4 but does not contact solid ammonia-storing material 5; Air filter 6 is connected with reducing agent conduit 16 through reducing gas delivery pipe 11, and reducing agent conduit 16 nozzles insert the tail gas entering and manage in 17 pipelines, proportional valve 13, gas transfer pump 20 on reducing gas delivery pipe 11 pipelines; Tail gas gets into pipe 17 and connects SCR preprocessor 19 inlet ends; SCR preprocessor 19 outlet sides connect exhaust emission tube 18, and gas inlet temperature transducer 14, NOX sensor 15 are connected tail gas and get on the pipe 17, and its induction end is positioned at tail gas and gets into pipe 17 pipelines.
The thickness of described autoclave 4 tank bodies is 4 ~ 5mm, and is cylindrical, tank interior thermal spraying one deck nylon thermal insulation layer.
The preparation and the filling method of described solid ammonia-storing material 5 are following: adopt 58 parts of industrial anhydrous magnesium chlorides by weight; 2 parts of expanded graphites, 15 parts of deionized waters, 15 parts of 10 parts of industrial alcohols and industrial ball clays; Above-mentioned material adopts the dough mixing machine of machinery to mix the powder that evenly becomes hygrometric state; Incorporation time 5 ~ 15min, mixture is filled in the autoclave 4 through the charging hole on the autoclave 47, adopts this withstand voltage tank body 5 ~ 10min of method concussion of machinery concussion; Remove air clearance wherein, feeding quantity causes 40% of tank body volume capacity; Whole tank body is put into vacuum drying cabinet, begins heating, average 5 ℃/10min from 25 ℃ of room temperatures under the normal pressure; Be warmed up to 70 ℃, charging hole 7 opens wide discharge water steam and alcohol steam, and 70 ℃ keep 30min; Under this temperature, start vacuum pump then; Progressively vacuumize, divide to make degree of vacuum reach 550mabr three times heat-insulation pressure keeping 30min;
Described anhydrous magnesium chloride also can adopt other inorganic salts that can form complex compound to substitute, can be strontium chloride, nickel chloride, copper chloride or calcium chloride etc. can and NH3 form the chloride of complex compound;
Selecting thickness is that at first to be welded into internal diameter be 300mm for the SUS304 plate of 4mm; Highly be the stainless steel cask of 330mm, order is accomplished the welding of liquid circulation pipeline and coil pipe, accomplishes the welding of bottom; The inner surface heat spraying nylon powder of bucket once notices that heating coil does not spray nylon; The welding of completion top capping, and in the capping of top, accomplish charging hole 7, pressure transducer 8, subsequent use pipe valve 9, temperature transducer 10, reducing gas delivery pipe 11 and filter 6, accomplished the connection of autoclave 4 relevant portions; Suppress leak test, guarantee that sealing and welding quality meet the demands;
Adopt 58 parts of industrial anhydrous magnesium chlorides, 2 parts of expanded graphites, 15 parts of deionized waters; 15 parts of 10 parts of industrial alcohols and industrial ball clays, above-mentioned material adopt the dough mixing machine of machinery to mix the powder that evenly becomes hygrometric state, incorporation time 5min; Mixture is filled in the autoclave 4 through the charging hole on the autoclave 47; Adopt this withstand voltage tank body 5 ~ 10min of method concussion of machinery concussion, remove air clearance wherein, feeding quantity causes 40% of tank body volume capacity; Whole tank body is put into vacuum drying cabinet, begins heating, average 5 ℃/10min from 25 ℃ of room temperatures under the normal pressure; Be warmed up to 70 ℃, charging hole 7 opens wide discharge water steam and alcohol steam, and 70 ℃ keep 30min; Under this temperature, start vacuum pump then; Progressively vacuumize, divide to make degree of vacuum reach 550mabr three times heat-insulation pressure keeping 30min;
Adopt high-purity industrial ammonia bottle through subsequent use pipe valve 9, fill ammonia; Under the environment of natural ventilation, carry out, put into autoclave 4 tank of the enough big cooling water of water yield in advance, connect the ammonia steel cylinder, through reduction valve and drying system, in the outlet pressure scope of 0.1Mpa slowly fill ammonia, filling the ammonia time is 3h; At the autoclave that fills the 4-built-in thermal insulation layer of weighing before and after the ammonia, the clean quality of the ammonia of confirming to charge into is greater than 8kg; After ammonia was filled in completion, the valve closing of whole system was guaranteed not reveal;
The electronic control unit 12 of join dependency, Proportional valve 13, NOX sensor 15, reducing agent conduit 16, gas inlet 17, tail gas exhaust port 18, SCR preprocessor 19 and gas transfer pump 20; And be connected with state's 4 threst stands of a 8.6L, start said system, according to setting; Started the 20-gas transfer pump in the time of the motivation running, realized beginning to carry ammonia from ' zero-time ', the delivery volume of setting ammonia is 90% of a theory demands amount; Begin test; The NOX conversion ratio of test engine under 6 operating modes, under the situation of ammonia leakage rate less than 15ppm, the NOX conversion ratio maintains in 70 ~ 92% scopes; Behind the engine running 8min, the temperature of 10-temperature transducer is greater than 60 ℃, and the 20-gas transfer pump quits work; At this moment, rely on the waste heat of system to realize supplying ammonia, the delivery volume of setting ammonia equally is 90% of a theory demands amount; Begin test; The NOX conversion ratio of test engine under 6 operating modes, under the situation of ammonia leakage rate less than 10ppm, the NOX conversion ratio maintains in 63 ~ 80% scopes;
Be assembled to said system on the chassis of a heavy-duty diesel oil truck, gas transfer pump 20 commences work without delay, and gas transfer pump 20 quits work behind vehicle driving 13min; MAP figure according to the NOX discharging of the normal operation of vehicle and this type; The delivery volume of setting ammonia is 80% of a theory demands amount, and when 15000km, this system still has the ammonia supply; NOX result under the real vehicle measurement full-loading condition meets design requirement in 44 ~ 66% scopes;
Ammonia Way out on autoclave 4 tank body tops has been installed air filter 6, guarantees that the inorganic powder in the tank body can not get into pipe-line system and stop up accurate device; Tank body is tightened charging hole 7 after adding active material; Pressure transducer 8 also is an automatic pressure-limit valve, guarantees the releasing pressure automatically of overpressure system; On tank body, accomplish subsequent use pipe valve 9 is installed, temperature transducer 10 and the reducing gas delivery pipe 11 that connects through air filter 6;
The feeding of reactive gas and the completion of absorption are carried out through subsequent use pipe valve 9; Can adopt high-purity industrial ammonia bottle, under the environment of natural ventilation, the absorption of considering ammonia is exothermic process; Shifting out the heat of system timely is to guarantee the ammonia key of absorption fast, therefore, puts into a tank that the water yield is enough big to the stainless autoclave 4 of built-in thermal insulation layer in advance; Connect the ammonia steel cylinder; Through reduction valve and drying system, in the outlet pressure scope of 0.02 ~ 0.2Mpa slowly fill ammonia, filling the ammonia time is 2 ~ 3h; At the autoclave 4 that fills the built-in thermal insulation layer of weighing before and after the ammonia, the clean quality of the ammonia of confirming to charge into is in prespecified range; After ammonia was filled in completion, the valve closing of whole system was guaranteed not reveal;
Reaching certain level when row's temperature of motor or NOX level is that the aperture of electronic control unit 12 control ratio valves 13 realizes that ammonia changes to the conveying of SCR preprocessor 19, satisfies the demand that under the vehicle difference operating modes NOX is removed.
Claims (4)
1. the active matter storage ammonia of the auxiliary waste heat mode of pump supplies the reprocessing control unit of ammonia; Form by motor, antifreeze liquid delivery pipe, solenoid valve, autoclave, solid ammonia-storing material, air filter, charging hole, pressure transducer, subsequent use pipe valve, autoclave temperature transducer, reducing gas delivery pipe, electronic control unit, Proportional valve, gas inlet temperature transducer, NOX sensor, reducing agent conduit, tail gas entering pipe, exhaust emission tube, SCR preprocessor, gas transfer pump; It is characterized in that: electronic control unit connects solenoid valve, gas transfer pump, Proportional valve through the signal wire harness; Gas inlet temperature transducer, NOX sensor, pressure transducer, autoclave temperature transducer connect the signal input part of electronic control unit through signaling line; Antifreeze liquid delivery pipe and engine antif liquid systems serial or parallel connection; The antifreeze liquid delivery pipe passes autoclave inside; The antifreeze liquid delivery pipe is positioned at the inner pipeline of autoclave and is the coil pipe distribution, and solenoid valve is positioned on the antifreeze liquid delivery pipe, fills the solid ammonia-storing material in the autoclave; Loading is 40% of a tank body volume capacity; Air filter, charging hole, pressure transducer, subsequent use pipe valve, autoclave temperature transducer are arranged on the autoclave, and wherein air filter is positioned at the outlet side of autoclave, and the induction end of autoclave temperature transducer is inserted in the solid ammonia-storing material; The induction end of pressure transducer is positioned at autoclave but does not contact the solid ammonia-storing material; Air filter is connected with the reducing agent conduit through the reducing gas delivery pipe, and the reducing agent catheter nozzle inserts tail gas and gets in the pipe pipeline, proportional valve, gas transfer pump on the reducing gas delivery pipe pipeline; Tail gas gets into pipe and connects SCR preprocessor inlet end; SCR preprocessor outlet side connects exhaust emission tube, and gas inlet temperature transducer, NOX sensor are connected tail gas and get on the pipe, and its induction end is positioned at tail gas and gets into the pipe pipeline.
2. the active matter storage ammonia of the auxiliary waste heat mode of a kind of pump according to claim 1 supplies the reprocessing control unit of ammonia, it is characterized in that the thickness of described autoclave tank body is 4 ~ 5mm, and is cylindrical, tank interior thermal spraying one deck nylon thermal insulation layer.
3. the active matter storage ammonia of the auxiliary waste heat mode of a kind of pump according to claim 1 supplies the reprocessing control unit of ammonia, it is characterized in that the preparation of described solid ammonia-storing material and filling method are following: adopt 58 parts of industrial anhydrous magnesium chlorides, 2 parts of expanded graphites; 15 parts of deionized waters; 15 parts of 10 parts of industrial alcohols and industrial ball clays, above-mentioned material adopt the dough mixing machine of machinery to mix the powder that evenly becomes hygrometric state, incorporation time 5 ~ 15min; Mixture is filled in the autoclave through the charging hole on the autoclave; Adopt this withstand voltage tank body 5 ~ 10min of method concussion of machinery concussion, remove air clearance wherein, feeding quantity causes 40% of tank body volume capacity; Whole tank body is put into vacuum drying cabinet, begins heating, average 5 ℃/10min from 25 ℃ of room temperatures under the normal pressure; Be warmed up to 70 ℃, charging hole opens wide discharge water steam and alcohol steam, and 70 ℃ keep 30min; Under this temperature, start vacuum pump then; Progressively vacuumize, divide to make degree of vacuum reach 550mabr three times heat-insulation pressure keeping 30min.
4. solid ammonia-storing material according to claim 2; It is characterized in that described anhydrous magnesium chloride also can adopt other inorganic salts that can form complex compound to substitute; For example, strontium chloride, nickel chloride, copper chloride or calcium chloride ability and NH3 form the chloride of complex compound.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953787A (en) * | 2012-11-28 | 2013-03-06 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Dual-pump type reducer jetting and supplying device |
| CN104121076A (en) * | 2014-08-11 | 2014-10-29 | 吉林省众鑫汽车装备有限公司 | Solid ammonia storage device |
| CN113006904A (en) * | 2021-02-24 | 2021-06-22 | 合肥工业大学 | Solid urea ammonia supply device for vehicle |
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| CN101344026A (en) * | 2008-08-21 | 2009-01-14 | 上海交通大学 | System for low temperature plasma pre-oxidizing NOx of auxiliary NH3-SCR fine purification diesel engine |
| CN202673418U (en) * | 2012-06-29 | 2013-01-16 | 中国第一汽车股份有限公司 | Pump assisted system for storing and supplying ammonia by one-stage waste heat mode |
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| CN102953787A (en) * | 2012-11-28 | 2013-03-06 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Dual-pump type reducer jetting and supplying device |
| CN104121076A (en) * | 2014-08-11 | 2014-10-29 | 吉林省众鑫汽车装备有限公司 | Solid ammonia storage device |
| CN113006904A (en) * | 2021-02-24 | 2021-06-22 | 合肥工业大学 | Solid urea ammonia supply device for vehicle |
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