CN202673413U - System for storing and supplying ammonia by means of exhaust pipe after heat - Google Patents
System for storing and supplying ammonia by means of exhaust pipe after heat Download PDFInfo
- Publication number
- CN202673413U CN202673413U CN2012203104846U CN201220310484U CN202673413U CN 202673413 U CN202673413 U CN 202673413U CN 2012203104846 U CN2012203104846 U CN 2012203104846U CN 201220310484 U CN201220310484 U CN 201220310484U CN 202673413 U CN202673413 U CN 202673413U
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- CN
- China
- Prior art keywords
- autoclave
- ammonia
- fixedly connected
- pressure resisting
- scr
- 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- Withdrawn - After Issue
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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
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model relates to a system for storing and supplying ammonia by means of exhaust pipe after heat. The system is characterized in that an outer flange disc is sleeved on an exhaust pipe; a pressure resisting tank inner wall barrel is sleeved on the exhaust pipe; one end of the pressure resisting tank inner wall barrel is fixedly connected with outer flange disc, and the other end is fixedly connected with another outer flange disc; an inner flange is sleeved and fixed connected on an the pressure resisting tank outer wall barrel; the pressure resisting tank inner wall barrel is sleeved on the inner flange disc; one end of the pressure resisting tank outer wall barrel is fixedly connected with the inner flange disc, and the other end is fixedly connected with another inner flange disc; the two inner flange discs and the pressure resisting tank inner wall barrel and the pressure resisting tank outer wall barrel form a hollow cavity, and the hollow cavity is filled with solid ammonia storing material; a sensing end of a pressure resisting tank temperature sensor is inserted into the solid ammonia storing material and is connected to the pressure resisting tank outer wall barrel; a control end of an electronic control unit is connected with a precise proportional valve through a signal line; a gas inlet pipe is connected with a gas inlet end of an SCR after-treatment; a gas outlet end of the SCR (Selective Catalytic Reduction) after-treatment is connected with the exhaust pipe; the after heat of engine exhaust is used for heating, and depending on the control unit and a group of electromagnetic valves or proportional valves, ammonia dosage is transferred and conveniently introduced to the SCR after-treatment system to realize the removal of NOX. According to the utility model, the system is simplified, the reliability is improved, the cost is also substantially reduced, and the obstacle to large-scale industrial generalization and application is eliminated.
Description
Technical field
The utility model relates to a kind of exhaust tube remaining heat mode and stores up ammonia for the system 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, and the aspects such as technical approach of How to choose reprocessing.
SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique is traditional post-processing technology.The essence of traditional SCR technology of this employing liquid area is to utilize urea at high temperature to decomposite ammonia, reacts under the comprehensive function of catalyzer and temperature as ammonia and the NOX in the engine exhaust of reducing agent, generates nontoxic N under the desirable operating mode
2And H
2O, thus reach the purpose of purification.
Traditional SCR has lot of advantages, for example, can have 50 ~ 85% NOX removal efficient in the scope of delivery temperature 250 ~ 550oC, 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 at present traditional SCR technology that adopt in Europe 4, 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 vehicle condition and the fuel oil for vehicles situation of China.
If apply traditional vehicle-mounted SCR post-processing technology in China, 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.
The each time upgrading of automobile emission standard all produces such or such shock effect to automobile industry.The Schedule that state's 4 standards of China are repeatedly postponed enforcement, it is not only the nonsynchronous sole cause of standard of fuel, also face the problem that the service facility of the carbamide reducing agent socialization of complicated social matching system and liquid is built, for example, behind state's 4 standard implementations, immediately can be to the required ECU(control unit of traditional SCR system running) and the DCU(batching unit) cause the demand, consider that the 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 product 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 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 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, calcium chloride or magnesium chloride, the system that is used in conjunction with ammonia, be the heat absorption and release 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 tail gas ammonia recovery device with gas phase method ', the patent No. of CN201120099229.7 is the characteristic component that ' be used for machine room of refrigerated warehouse join ammonia bindiny mechanism ' of CN201020677361.7 and ' composite functional ammonia storage device ' that the patent No. is 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 for selective catalytic reduction (SCR) catalytic converter and traditional liquid ureaclastic ammonia dispensing module and control system, 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 feature 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 the expensive 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 the solid material of delivering ammonia ' storage and ' relates to and storing and the solid material of delivering ammonia.The solid material of this storage ammonia comprises M
a(NH3)
nX
zIonic salt, salt solid material by the moulding of mould direct voltage, for example, is made cylinder, then arranged together a lot of this cylinders.The disadvantage of this patent is that cylinder is too closely knit, the saturated adsorption that carries out again ammonia after each ammonia desorb is finished 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 very of using on the automobile.
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.Mentioned property material and be such salt or be positioned on the porous carrier materials in the claim 4 of this patent, 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 and its production and use ' disclosure of the invention a kind of amido complex compound and its production and use.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, describedly be compacted to density greater than 50% storage of theoretical skeletal density and carried 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, only stated it to be to have adopted the silicon dioxide fibre Bond, do not have the dosage ratio yet, do not offer some clarification on the thin item of other composition that adopts, the professional and technical personnel almost can't implement.
The retrieval of above-mentioned patent and the analysis showed that is adsorbed and is resolved ammonia with activity storage ammoniate, has formed the after-treatment system of using at vehicle and has not also appeared in the newspapers.
Summary of the invention
The purpose of this utility model is to provide a kind of exhaust tube remaining heat mode to store up ammonia for the system of ammonia, and 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 exhaust 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; Simplify system, improved reliability, also significantly reduced cost, eliminated the obstacle that large-scale industry is applied.
The technical solution of the utility model is achieved in that a kind of exhaust tube remaining heat mode stores up ammonia for the system of ammonia, it is characterized in that: the internal diameter of the flange hole of outward flange dish and the external diameter of outlet pipe are complementary, the outward flange dish is enclosed within on the outlet pipe, autoclave inwall cylinder external diameter is greater than the external diameter 20 ~ 40mm of outlet pipe, autoclave inwall jacket casing side on outlet pipe is fixedly connected with the outward flange dish, opposite side is fixedly connected with another sheet outward flange dish, autoclave inwall cylinder and outlet pipe gap are 10 ~ 20mm, inner flange is enclosed within on the autoclave inwall cylinder and is fixedly connected with, autoclave outer wall jacket casing side on inner flange is fixedly connected with inner flange, autoclave outer wall cylinder opposite side is fixedly connected with another sheet inner flange, two inner flanges and autoclave inwall cylinder, autoclave outer wall cylinder forms cavity, fill the solid ammonia-storing material in the cavity, autoclave temperature sensor senses end inserts in the solid ammonia-storing material and is connected on the autoclave outer wall cylinder, air filter is connected on the air outlet on the autoclave outer wall cylinder, on the autoclave outer wall cylinder charging hole is arranged, pipe valve for subsequent use, air filter siphunculus road connects the reducing agent conduit, between air filter and the reducing agent conduit line accurate Proportional valve is arranged, reducing agent catheter nozzle end probes in the suction tude pipe, temperature transducer and NOX sensor are connected on the suction tude, induction end probes in the suction tude, intake manifold temperature sensor and NOX sensor, the autoclave temperature transducer is by signaling line connecting electronic control unit signal input part, the electronic control unit control end connects accurate Proportional valve by signaling line, suction tude connects SCR preprocessor inlet end, and SCR preprocessor outlet side connects outlet pipe.
Good effect of the present utility model is after ammonia once fills in system, can guarantee that the mileage of Vehicle Driving Cycle is 20000 ~ 40000km, has sufficient practicability, Economy and advance; This technology is used the meaning with reality at vehicle-mounted SCR.
Description of drawings
Fig. 1 is accompanying drawing of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment: as shown in Figure 1, a kind of exhaust tube remaining heat mode is stored up ammonia for the system of ammonia, it is characterized in that: the external diameter of the internal diameter of the flange hole of outward flange dish 16 and outlet pipe 14 is complementary, outward flange dish 16 is enclosed within on the outlet pipe 14, autoclave inwall cylinder 15 external diameters are greater than the external diameter 20 ~ 40mm of outlet pipe 14, autoclave inwall cylinder 15 is enclosed within that a side is fixedly connected with outward flange dish 16 on the outlet pipe 14, opposite side is fixedly connected with another sheet outward flange dish 16, autoclave inwall cylinder 15 is 10 ~ 20mm with outlet pipe 14 gaps, inner flange 17 is enclosed within on the autoclave inwall cylinder 15 and is fixedly connected with, autoclave outer wall cylinder 2 is enclosed within that a side is fixedly connected with inner flange 17 on the inner flange 17, autoclave outer wall cylinder 2 opposite sides are fixedly connected with another sheet inner flange 17, two inner flanges 17 and autoclave inwall cylinder 15, autoclave outer wall cylinder 2 forms cavity, fill solid ammonia-storing material 5 in the cavity, autoclave temperature transducer 7 induction end are inserted in the solid ammonia-storing material 5 and are connected on the autoclave outer wall cylinder 2, air filter 6 is connected on the air outlet on the autoclave outer wall cylinder 2, on the autoclave outer wall cylinder 2 charging hole 3 is arranged, pipe valve 4 for subsequent use, air filter 6 siphunculus roads connect reducing agent conduit 10, between air filter 6 and reducing agent conduit 10 pipelines accurate Proportional valve 11 is arranged, reducing agent conduit 10 nozzle end probe in suction tude 13 pipes, temperature transducer 8 and NOX sensor 9 are connected on the suction tude 13, induction end probes in the suction tude 13, intake manifold temperature sensor 8 and NOX sensor 9, autoclave temperature transducer 7 is by signaling line connecting electronic control unit 12 signal input parts, electronic control unit 12 control ends connect accurate Proportional valve 11 by signaling line, suction tude 13 connects SCR preprocessor 1 inlet end, and SCR preprocessor 1 outlet side connects outlet pipe 14.
Embodiment 1
First the two ends of autoclave inwall cylinder 15 and 2 inner flanges 17 are welded together respectively, again the two ends of autoclave outer wall cylinder 2 and these two inner flanges 17 are welded together, formed the active material storage area at autoclave inwall cylinder 15, autoclave outer wall cylinder 2, inner flange 17 like this; Charging hole 3 is welded on the autoclave outer wall cylinder 2; Pipe valve 4 for subsequent use is welded on the autoclave outer wall cylinder 2; Connect air filter 6 and temperature transducer 7 at autoclave outer wall cylinder 2, reducing agent conduit 10 connects air filter 6, finishes the making of withstand voltage tank body;
Adopt 60 parts of industrial anhydrous calcium chlorides, 2 parts of expanded graphites, 13 parts of deionized waters, 15 parts of 10 parts of industrial alcohols and industrial ball clays, total amount preparation 12kg, volume of material is about 12.8L, said mixture adopts the dough mixing machine of machinery to mix the powder that evenly becomes hygrometric state, incorporation time 5 ~ 15min is filled in the withstand voltage tank body by charging hole 3, adopts this withstand voltage tank body 5 ~ 10min of method concussion of machinery concussion; Whole withstand voltage tank body is put into vacuum drying cabinet, begins heating from 25 ℃ of room temperatures under the normal pressure, and average 5 ℃/10min is warmed up to 70 ℃, and the 3-charging hole opens wide when noting heat drying; Keep 30min under this temperature, then under this temperature, start vacuum pump, progressively vacuumize, divide to make degree of vacuum reach 550mabr three times heat-insulation pressure keeping 30min; Processing is filled and dehydrated to the material of finishing in the withstand voltage tank body;
Adopt high-purity industrial ammonia bottle, be connected on the pipe valve 4 for subsequent use by reduction valve, in advance stainless autoclave is put into enough large tanks of a water yield, under the environment of natural ventilation, by reduction valve and drying system, in the outlet pressure scope of 0.02 ~ 0.2Mpa, slowly fill ammonia, pass into ammonia 2h; Fill the autoclave weightening finish 6.5kg of ammonia front and back, namely pass into and be absorbed the ammonia of 6.5kg; Finish fill ammonia after, the valve closing of whole system is guaranteed not reveal;
Connect accurate Proportional valve 11 on the withstand voltage tank body, electronic control unit 12 is connected with polished rice Proportional valve 11 by signaling line; And this system is connected on the SCR preprocessor 1 that volume is 24L mounting temperature sensor 8 and commercially available NOX sensor 9; State's 4 threst stands that said system and element are connected to a 8.6L are connected, the flange hole that is outward flange dish 16 is enclosed within on the outlet pipe 14, and behind the engine running 7min, the temperature of system shows 78 ℃, pressure is shown as 0.1,4Mpa, start-up system, the delivery volume of setting ammonia is 90% of theory demands amount, begin test, the NOX conversion ratio of test engine under 6 operating modes, in the situation that the ammonia leakage rate is less than 15ppm, the NOX conversion ratio maintains in 52 ~ 830% scopes;
Ammonia that system produces just at first filters through air filter 6, remove Powdered composition, enter the leading portion of reducing agent conduit 10 and accurate Proportional valve 11, and the aperture size of accurate Proportional valve 11 is controlled by electronic control unit 12, input to the signal of electronic control unit 12 from the temperature transducer 8 that is installed in SCR entrance front end and NOX sensor 9, determined size and the time point of electronic control unit 12 for accurate Proportional valve 11 signals output; The outlet of reducing gas delivery pipe 10 has realized the control of amount and the conveying of ammonia thus after accurate Proportional valve 11, reach the purpose that NOX removes;
Reaching certain level when row's temperature of motor or NOX level is that the aperture of the accurate Proportional valve 11 of electronic control unit 12 controls is implemented to the quantitative change of the delivering ammonia of SCR preprocessor 1, satisfies the demand that under the different operating modes of vehicle NOX is removed.
Claims (1)
1. an exhaust tube remaining heat mode is stored up ammonia for the system of ammonia, it is characterized in that: the internal diameter of the flange hole of outward flange dish and the external diameter of outlet pipe are complementary, the outward flange dish is enclosed within on the outlet pipe, autoclave inwall cylinder external diameter is greater than the external diameter 20 ~ 40mm of outlet pipe, autoclave inwall jacket casing side on outlet pipe is fixedly connected with the outward flange dish, opposite side is fixedly connected with another sheet outward flange dish, autoclave inwall cylinder and outlet pipe gap are 10 ~ 20mm, inner flange is enclosed within on the autoclave inwall cylinder and is fixedly connected with, autoclave outer wall jacket casing side on inner flange is fixedly connected with inner flange, autoclave outer wall cylinder opposite side is fixedly connected with another sheet inner flange, two inner flanges and autoclave inwall cylinder, autoclave outer wall cylinder forms cavity, fill the solid ammonia-storing material in the cavity, autoclave temperature sensor senses end inserts in the solid ammonia-storing material and is connected on the autoclave outer wall cylinder, air filter is connected on the air outlet on the autoclave outer wall cylinder, on the autoclave outer wall cylinder charging hole is arranged, pipe valve for subsequent use, air filter siphunculus road connects the reducing agent conduit, between air filter and the reducing agent conduit line accurate Proportional valve is arranged, reducing agent catheter nozzle end probes in the suction tude pipe, temperature transducer and NOX sensor are connected on the suction tude, induction end probes in the suction tude, intake manifold temperature sensor and NOX sensor, the autoclave temperature transducer is by signaling line connecting electronic control unit signal input part, the electronic control unit control end connects accurate Proportional valve by signaling line, suction tude connects SCR preprocessor inlet end, and SCR preprocessor outlet side connects outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203104846U CN202673413U (en) | 2012-06-29 | 2012-06-29 | System for storing and supplying ammonia by means of exhaust pipe after heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203104846U CN202673413U (en) | 2012-06-29 | 2012-06-29 | System for storing and supplying ammonia by means of exhaust pipe after heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673413U true CN202673413U (en) | 2013-01-16 |
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ID=47494322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203104846U Withdrawn - After Issue CN202673413U (en) | 2012-06-29 | 2012-06-29 | System for storing and supplying ammonia by means of exhaust pipe after heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202673413U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720572A (en) * | 2012-06-29 | 2012-10-10 | 中国第一汽车股份有限公司 | Post-processing control unit of active matter ammonia-storage and ammonia-supply of exhaust pipe waste heat method |
| CN103114897A (en) * | 2013-01-30 | 2013-05-22 | 吉林省众鑫汽车装备有限公司 | Motor vehicle tail gas treater |
| EP2944779A1 (en) * | 2014-05-12 | 2015-11-18 | Magneti Marelli S.p.A. | Exhaust system for exhaust gas after-treatment in an internal combustion engine provided with a tank for the collection of solid matrices to store ammonia |
| CN107489506A (en) * | 2017-06-27 | 2017-12-19 | 中国第汽车股份有限公司 | The combined system of distributed solid SSCR systems and ASC catalyst converters |
-
2012
- 2012-06-29 CN CN2012203104846U patent/CN202673413U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720572A (en) * | 2012-06-29 | 2012-10-10 | 中国第一汽车股份有限公司 | Post-processing control unit of active matter ammonia-storage and ammonia-supply of exhaust pipe waste heat method |
| CN102720572B (en) * | 2012-06-29 | 2016-06-29 | 中国第一汽车股份有限公司 | The aftertreatment control unit of the active matter storing and supplying ammonia of exhaust tube remaining heat mode |
| CN103114897A (en) * | 2013-01-30 | 2013-05-22 | 吉林省众鑫汽车装备有限公司 | Motor vehicle tail gas treater |
| EP2944779A1 (en) * | 2014-05-12 | 2015-11-18 | Magneti Marelli S.p.A. | Exhaust system for exhaust gas after-treatment in an internal combustion engine provided with a tank for the collection of solid matrices to store ammonia |
| CN107489506A (en) * | 2017-06-27 | 2017-12-19 | 中国第汽车股份有限公司 | The combined system of distributed solid SSCR systems and ASC catalyst converters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130116 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |