CN202673411U - Selective reduction reaction system - Google Patents
Selective reduction reaction system Download PDFInfo
- Publication number
- CN202673411U CN202673411U CN2012203463745U CN201220346374U CN202673411U CN 202673411 U CN202673411 U CN 202673411U CN 2012203463745 U CN2012203463745 U CN 2012203463745U CN 201220346374 U CN201220346374 U CN 201220346374U CN 202673411 U CN202673411 U CN 202673411U
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- China
- Prior art keywords
- urea
- control unit
- reduction reaction
- reaction system
- selective reduction
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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
- Y02T10/12—Improving ICE efficiencies
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a selective reduction reaction system and belongs to the technical field of a tail gas purification system for a diesel engine for an automobile. The selective reduction reaction system comprises a urea tank, a urea pump, a urea nozzle, a selective catalytic reduction (SCR) catalytic converter, an engine control unit, an engine exhaust gas exhaust pipe and a control unit, wherein the urea tank, the urea pump, the urea nozzle and the SCR catalytic converter are sequentially arranged through pipes. The engine exhaust gas exhaust pipe is arranged on the pipe between the urea nozzle and the SCR catalytic converter, the urea pump is driven by a direct current motor, the direct current motor is controlled by the control unit, real time communication between the control unit and the engine control unit is achieved through a controller area network (CAN), the urea tank is provided with a urea temperature sensor connected with the control unit and a urea liquid level sensor connected with the control unit, and an exhaust gas temperature sensor connected with the control unit and an oxynitride sensor connected with the control unit are arranged on an output terminal of the SCR catalytic converter. The selective reduction reaction system is high in reductive transformation efficiency and low in cost.
Description
Technical field
The utility model discloses a kind of selective reduction reaction system, belongs to the technical field of diesel engine for automobile exhaust gas purification system.
Background technique
SCR(Selective Catalytic Reduction) the selective reduction reaction system be a kind of in the derv fuel tail gas atomizing of liquids urea liquid, and make it in high-temperature tail gas, flash to the nitrogen oxide NOx of ammonia and diesel engine discharge, under the catalyst action in catalyst converter, reduction reaction occurs, thereby greatly reduces the NOx value until satisfy a kind of device of emission regulation demands.And there is the defective that the reduction transformation efficiency is low, cost is high in the selective reduction reaction system of existing structure.
Summary of the invention
The purpose of this utility model provides a kind of selective reduction reaction system that transformation efficiency is high, cost is low that reduces.
For achieving the above object, the technological scheme that the utility model adopts is:
A kind of selective reduction reaction system, comprise the urea box of installing successively by pipeline, urea pump, urea nozzle, the SCR catalytic converter, and control unit of engine, the engine exhaust outlet pipe, control unit, wherein the engine exhaust outlet pipe is installed on the pipeline between urea nozzle and the SCR catalytic converter, urea pump is driven by direct current generator, direct current generator is controlled by control unit, pass through in real time the CAN communication between control unit and the control unit of engine, the urea temperature transducer that is connected with control unit is installed on the urea box, urea liquid level sensor is equipped with the exhaust gas temperature sensor that is connected with control unit on the output terminal of SCR catalytic converter, NOx sensor.
As the further setting of such scheme, described urea pump is with filter, and filter is double filter.Filter is installed in the front end of urea pump, with the impurity filtering in the urea liquid, adopts double-stage filtering, and the front is that the coarse filtration back is the essence filter.Urea enters urea nozzle after filtering by filter again.
Described urea nozzle is spray orifice shape atomizer nozzle, makes the urea liquid atomizing better, and is better with mixing of tail gas.
Described SCR catalytic converter adopts the stainless steel casing encapsulation, and the welding manner welding can prevent that urea to the corrosion of shell, encapsulating more firm and durable behind the employing crimping.
Described SCR catalytic converter adopts the extruded type catalytic component based on vanadium, than coating type catalyzer larger porosity ratio is arranged, and the reduction transformation efficiency is higher, and cost is lower.
Described urea pump adopts the mode of resistance silk rug at cold area urea to be thawed with heating blanket.
Control unit in the utility model and control unit of engine are in real time by the CAN communication, according to the injection of engine operation condition control urea liquid.In control unit, increase antitheft logic, prevent that more valuable control unit is stolen.
The utility model adopts the automobile-used urea liquid of 32.5% international concentration, from urea box, urea pump by a direct current generator drive, in urea pipe, set up the pressure of demand, and pump into urea nozzle, and spray in the waste pipe after the tiny spray orifice atomizing by urea nozzle, under exhaust high temperature, be gasificated into rapidly ammonia and mix with exhaust, mixed gas is when arriving catalyst converter, and under the catalysis of catalyzer, reduction reaction occurs for the nitrogen oxide NOx in the tail gas and ammonia NH3, generate the nitrogen G﹠W, finish the reduction of discharging effect of harmful matter NOx in the tail gas.
The utility model is well positioned to meet diesel engine for automobile for the requirement of transformation efficiency, makes vehicle can satisfy national emission regulation demands.Has less trouble in durability, can satisfy domestic vehicle often use under rugged environment relatively such as air in damaged many, the situation such as road is muddy of large, the road of dust, and can better all be not so good as in fuel oil quality, urea liquid quality the work of external Environmental Conditions.
In a word, the utility model reduction transformation efficiency is high, cost is low.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model selective reduction reaction system, comprise the urea box 1 of installing successively by pipeline, urea pump 2, urea nozzle 3, SCR catalytic converter 4, and control unit of engine 5, engine exhaust outlet pipe 6, control unit 7, wherein engine exhaust outlet pipe 6 is installed on the pipeline between urea nozzle 3 and the SCR catalytic converter 4, urea pump 2 is driven by direct current generator 8, direct current generator 8 is controlled by control unit 7, pass through in real time the CAN communication between control unit 7 and the control unit of engine 5, the urea temperature transducer 9 that is connected with control unit 7 is installed on the urea box 1, urea liquid level sensor 10 is equipped with the exhaust gas temperature sensor 11 that is connected with control unit 7 on the output terminal of SCR catalytic converter 4, NOx sensor 12.
Wherein, urea pump 2 is with filter 13 and heating blanket, and filter 13 is double filter.Urea nozzle 3 is spray orifice shape atomizer nozzle.SCR catalytic converter 4 adopts the stainless steel casing encapsulation, and adopts the extruded type catalytic component based on vanadium.
Above-described embodiment only is used for explaining inventive concept of the present utility model, but not to the restriction of the utility model rights protection, allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should fall into protection domain of the present utility model.
Claims (6)
1. selective reduction reaction system, it is characterized in that: comprise the urea box of installing successively by pipeline, urea pump, urea nozzle, the SCR catalytic converter, and control unit of engine, the engine exhaust outlet pipe, control unit, wherein the engine exhaust outlet pipe is installed on the pipeline between urea nozzle and the SCR catalytic converter, urea pump is driven by direct current generator, direct current generator is controlled by control unit, pass through in real time the CAN communication between control unit and the control unit of engine, the urea temperature transducer that is connected with control unit is installed on the urea box, urea liquid level sensor is equipped with the exhaust gas temperature sensor that is connected with control unit on the output terminal of SCR catalytic converter, NOx sensor.
2. selective reduction reaction system as claimed in claim 1, it is characterized in that: described urea pump is with filter, and filter is double filter.
3. selective reduction reaction system as claimed in claim 1, it is characterized in that: described urea nozzle is spray orifice shape atomizer nozzle.
4. selective reduction reaction system as claimed in claim 1 is characterized in that: the encapsulation of described SCR catalytic converter employing stainless steel casing.
5. selective reduction reaction system as claimed in claim 1 is characterized in that: described SCR catalytic converter employing extruded type catalytic component based on vanadium.
6. selective reduction reaction system as claimed in claim 1, it is characterized in that: described urea pump is with heating blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203463745U CN202673411U (en) | 2012-07-18 | 2012-07-18 | Selective reduction reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203463745U CN202673411U (en) | 2012-07-18 | 2012-07-18 | Selective reduction reaction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673411U true CN202673411U (en) | 2013-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203463745U Expired - Fee Related CN202673411U (en) | 2012-07-18 | 2012-07-18 | Selective reduction reaction system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202673411U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748102A (en) * | 2012-07-18 | 2012-10-24 | 绍兴文理学院 | Selective reduction reaction system |
-
2012
- 2012-07-18 CN CN2012203463745U patent/CN202673411U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748102A (en) * | 2012-07-18 | 2012-10-24 | 绍兴文理学院 | Selective reduction reaction system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |