CN108979806A - A kind of SCR catalytic converter and its cabinet - Google Patents
A kind of SCR catalytic converter and its cabinet Download PDFInfo
- Publication number
- CN108979806A CN108979806A CN201811130599.5A CN201811130599A CN108979806A CN 108979806 A CN108979806 A CN 108979806A CN 201811130599 A CN201811130599 A CN 201811130599A CN 108979806 A CN108979806 A CN 108979806A
- Authority
- CN
- China
- Prior art keywords
- shell
- cabinet
- tail gas
- interior case
- gas chamber
- 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.)
- Granted
Links
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 24
- 239000003054 catalyst Substances 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 238000006479 redox reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention provides a kind of SCR catalytic converter and its cabinets, the cabinet includes interior case (1) and outer container, the box shell of outer container includes inner casing (21) and shell (22), the inner surface of inner casing (21) forms the first accommodating chamber, tail gas chamber is formed between the outer surface of inner casing (21) and the inner surface of shell (22), the top of shell (22) has the exhaust pipe (221) being connected to tail gas chamber；Interior case (1) is located in the first accommodating chamber, interior case (1) has the second accommodating chamber for installing catalyst carrier component, interior case (1) has to extend outwardly close to the position at top is pierced by the air inlet pipe (11) of outer container, and the bottom of interior case (1) has the escape pipe for extending downwardly and being connected to tail gas chamber.It uses cabinet provided by the invention that SCR catalytic converter can be made to achieve the effect that the row's of being promoted temperature in a manner of more energy saving, efficient, so that the redox reaction of exhaust aftertreatment be made to carry out under preferable environment, is conducive to promote emission level.
Description
Technical field
The present invention relates to diesel engine technologies fields, more particularly to a kind of SCR catalytic converter and its cabinet.
Background technique
The present regulation in relation to motor vehicle emission is increasingly stringenter, and is also proposed constantly to automobile exhaust post-processing higher
It is required that.SCR catalytic reduction technique is to reduce diesel engine NOx emission, meets the important technology of state IV and the above emission regulation
Route, SCR catalytic converter also become most widely used automobile exhaust gas processing apparatus.
SCR catalytic converter needs are reached a certain level in delivery temperature could react most abundant, still, according to current vehicle
From the point of view of universal actual operating mode, warm all less desirable, the operating condition especially in urban district, suburbs, exhaust temperature are arranged
Degree is all unable to reach the optimum temperature of SCR conversion efficiency.
The optimum temperature of SCR conversion efficiency, currently used two ways difference are reached or approached for the row's of being promoted temperature
It is to wrap up one layer of heat preservation material outside SCR case and electric heater unit is set in SCR catalytic converter, however, using thermal insulating material
It is little that material mode temperature promotes effect, and cannot achieve temperature-controllable；Heating dress need to additionally be installed additional using electronics heating method
It sets and control system, needs to expend the electricity of automobile when bringing the increase of installation cost and later maintenance cost, and heating,
Bring the consumption of the energy.
In conclusion it is how more energy saving, efficiently promoted row temperature, to reach or approach the best of SCR conversion efficiency
Temperature becomes those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
In view of this, SCR can be made to urge using the cabinet the present invention provides a kind of SCR catalytic converter and its cabinet
Change converter and achieve the effect that the row's of being promoted temperature in a manner of more energy saving, efficient, to keep the redox of exhaust aftertreatment anti-
It should be carried out under preferable environment, be conducive to promote emission level.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of cabinet of SCR catalytic converter, including interior case and outer container, the box shell of the outer container include inner casing and shell,
The inner surface of the inner casing forms the first accommodating chamber, forms tail gas between the outer surface of the inner casing and the inner surface of the shell
Chamber, the top of the shell have the exhaust pipe being connected to the tail gas chamber；
The interior case is located in first accommodating chamber, and the interior case has second for installing catalyst carrier component
Accommodating chamber, the interior case has to extend outwardly close to the position at top is pierced by the air inlet pipe of the outer container, the bottom of the interior case
With the escape pipe for extending downwardly and being connected to the tail gas chamber.
Preferably, in above-mentioned cabinet, the distance between the outer surface of the inner casing and the inner surface of the shell are
20mm~50mm.
Preferably, in above-mentioned cabinet, the shell has the bypass pipe for being connected to the tail gas chamber and ambient atmosphere, described
Safety valve is provided on bypass pipe.
Preferably, in above-mentioned cabinet, the entrance of the bypass pipe is located at escape pipe described in the bottom face of the shell
Position.
Preferably, in above-mentioned cabinet, the safety valve is solenoid valve, is provided with baroceptor on the exhaust pipe,
The pressure sensor is electrically connected with the safety valve.
Preferably, in above-mentioned cabinet, temperature sensor, the temperature sensor and the peace are provided on the shell
Full valve electrical connection.
Preferably, in above-mentioned cabinet, the interior case and the outer container are cuboid.
Preferably, in above-mentioned cabinet, the temperature sensor includes that the first temperature positioned at the top surface of the shell passes
Sensor and second temperature sensor positioned at the side of the shell.
Preferably, in above-mentioned cabinet, the bottom of the shell has the drainpipe being connected to the tail gas chamber.
A kind of SCR catalytic converter, including cabinet, the cabinet are the cabinet as disclosed in above-mentioned any one.
According to the above technical scheme it is found that provided by the present invention in the cabinet of SCR catalytic converter, urged for containing
The interior case of agent carrier module is located in the inner casing of outer container, and tail gas chamber is formed between the inner casing of outer container and shell, and interior case leans on
The position at nearly top, which has to extend outwardly, stretches out the air inlet pipe of outer container, and the bottom of interior case, which has, to be extended downwardly and be connected to tail gas chamber
Escape pipe, meanwhile, the top of the shell of outer container has exhaust pipe be connected to tail gas chamber, so, the tail gas elder generation of engine by
Air inlet pipe enters interior case, enters tail gas chamber from escape pipe again after completing catalysis reduction, then flows through the arrival of tail gas chamber from bottom to top
The exhaust pipe of outer box top is finally discharged from exhaust pipe.
It is located in the inner casing of outer container due to interior case, and tail gas chamber is formed by the inner casing and shell of outer container, so tail gas chamber is protected
It is trapped among on the outside of interior case, tail gas, which is filled in tail gas chamber, can form closed gas wall together, with existing SCR catalytic converter
It compares, the effect of temperature raising can be played.It can be seen that SCR catalytic converter can be to hair after using cabinet provided by the invention
The tail gas of motivation discharge carries out secondary use, and the row's of being promoted temperature is achieved the effect that in a manner of more energy saving, efficient, is conducive in this way
The redox reaction of exhaust aftertreatment carries out under preferable environment, obtains preferable emission level.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of cross-sectional view of cabinet for SCR catalytic converter provided in an embodiment of the present invention；
Fig. 2 is the A-A cross-sectional view in Fig. 1；
Fig. 3 is the appearance diagram of the cabinet provided in an embodiment of the present invention for SCR catalytic converter.
In the figure, it is marked as
1, interior case；11, air inlet pipe；21, inner casing；22, shell；221, exhaust pipe；222, bypass pipe；223, drainpipe；31,
First temperature sensor；32, second temperature sensor.
Specific embodiment
In order to make it easy to understand, the invention will be further described with reference to the accompanying drawing.
Referring to FIG. 1 to FIG. 3, Fig. 1 is a kind of section view of cabinet for SCR catalytic converter provided in an embodiment of the present invention
Figure, Fig. 2 is the A-A cross-sectional view in Fig. 1, and Fig. 3 is the appearance of the cabinet provided in an embodiment of the present invention for SCR catalytic converter
Schematic diagram.
Cabinet provided in an embodiment of the present invention for SCR catalytic converter includes interior case 1 and outer container, wherein outer container
Box shell includes inner casing 21 and shell 22, and the inner surface of inner casing 21 forms the first accommodating chamber, outer surface and the shell 22 of inner casing 21
Tail gas chamber is formed between inner surface, the top of shell 22 has the exhaust pipe 221 being connected to tail gas chamber；Interior case 1 is located at first and holds
Receive intracavitary, interior case 1 has the second accommodating chamber for installing catalyst carrier component, interior case 1 close to the position at top have to
Outer to extend the air inlet pipe 11 for being pierced by outer container, the bottom of interior case 1 has the escape pipe for extending downwardly and being connected to tail gas chamber (in figure not
Label).
In use, the tail gas of engine first enters interior case 1 by air inlet pipe 11, enter again from escape pipe after completing catalysis reduction
Then tail gas chamber flows through the exhaust pipe 221 that tail gas chamber reaches outer box top from bottom to top, is finally discharged from exhaust pipe 221.
It is located in the inner casing 21 of outer container due to interior case 1, and tail gas chamber is formed by the inner casing 21 and shell 22 of outer container, so tail
Air cavity guarantor is trapped among interior 1 outside of case, and tail gas, which is filled in tail gas chamber, can form closed gas wall together, urge with existing SCR
Change converter to compare, the effect of temperature raising can be played.It can be seen that after using cabinet provided by the invention, SCR catalytic converter
Secondary use can be carried out to the tail gas that engine is discharged, the row's of being promoted temperature is achieved the effect that in a manner of more energy saving, efficient, this
The redox reaction that sample is conducive to exhaust aftertreatment carries out under preferable environment, obtains preferable emission level.
In specific practical application, the distance between inner surface of the outer surface of inner casing 21 and shell 22 can for 20mm~
50mm。
In order to improve safety, can be arranged on shell 22 connection tail gas chamber and ambient atmosphere bypass pipe 222, and
Safety valve is set on bypass pipe 222, and in this way when pressure at expulsion is excessive, tail gas can be exhausted directly in atmosphere by bypass pipe.Such as
Shown in Fig. 1, the entrance of bypass pipe 222 is generally located on the bottom of shell 22 and the position of escape pipe face.
In specific practical application, safety valve can use solenoid valve, baroceptor be arranged on exhaust pipe 221, and will
Pressure sensor is electrically connected with safety valve.
When safety valve uses solenoid valve, the temperature sensor being electrically connected with safety valve can also be set on shell 22, this
Sample can control safety valve opening when detecting delivery temperature beyond setting value, so that the row's of avoiding temperature is excessively high.
Interior case 1 and outer container all can be cuboid, as shown in figures 1 and 3, in the present embodiment, temperature sensor includes
Positioned at the first temperature sensor 31 of the top surface of shell 22 and positioned at the second temperature sensor 32 of the side of shell 22, have in this way
Conducive to the temperature controlled accuracy of raising.
It as depicted in figs. 1 and 2, can be at the bottom of shell 22 in order to periodically release the intracavitary ponding gradually formed of tail gas
The drainpipe 223 being connected to tail gas chamber is arranged in portion, and discharging valve is arranged on drainpipe 223.
The present invention also provides a kind of SCR catalytic converter, which includes case disclosed in above-described embodiment
Body.The cabinet as disclosed in above-described embodiment has above-mentioned technique effect, and the SCR catalytic converter with the cabinet is same
It has above-mentioned technique effect, repeats no more herein.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
A variety of modifications of embodiment will be readily apparent to those skilled in the art, it is as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will not
It can be restricted to embodiment illustrated herein, and be to fit to consistent with the principles and novel features disclosed in this article most wide
Range.
Claims (10)
1. a kind of cabinet of SCR catalytic converter, which is characterized in that including interior case (1) and outer container, the box shell of the outer container includes
Inner casing (21) and shell (22), the inner surface of the inner casing (21) form the first accommodating chamber, the outer surface of the inner casing (21) with
Tail gas chamber is formed between the inner surface of the shell (22), the top of the shell (22) has the row being connected to the tail gas chamber
Tracheae (221)；
The interior case (1) is located in first accommodating chamber, and the interior case (1) has for installing catalyst carrier component
Two accommodating chambers, the interior case (1) has to extend outwardly close to the position at top is pierced by the air inlet pipe (11) of the outer container, described interior
The bottom of case (1) has the escape pipe for extending downwardly and being connected to the tail gas chamber.
2. cabinet according to claim 1, which is characterized in that the outer surface of the inner casing (21) and the shell (22)
The distance between inner surface is 20mm~50mm.
3. cabinet according to claim 1, which is characterized in that the shell (22), which has, is connected to the tail gas chamber and the external world
The bypass pipe (222) of atmosphere is provided with safety valve on the bypass pipe (222).
4. cabinet according to claim 3, which is characterized in that the entrance of the bypass pipe (222) is located at the shell
(22) position of escape pipe described in bottom face.
5. cabinet according to claim 4, which is characterized in that the safety valve is solenoid valve, on the exhaust pipe (221)
It is provided with baroceptor, the pressure sensor is electrically connected with the safety valve.
6. cabinet according to claim 5, which is characterized in that it is provided with temperature sensor on the shell (22), it is described
Temperature sensor is electrically connected with the safety valve.
7. cabinet according to claim 6, which is characterized in that the interior case (1) and the outer container are cuboid.
8. cabinet according to claim 7, which is characterized in that the temperature sensor includes being located at the shell (22)
The second temperature sensor (32) of the first temperature sensor (31) of top surface and the side positioned at the shell (22).
9. cabinet described according to claim 1~any one of 8, which is characterized in that the bottom of the shell (22) has
The drainpipe (223) being connected to the tail gas chamber.
10. a kind of SCR catalytic converter, including cabinet, which is characterized in that the cabinet is as any one in claim 1~9
Cabinet described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130599.5A CN108979806B (en) | 2018-09-27 | 2018-09-27 | SCR catalytic converter and box thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130599.5A CN108979806B (en) | 2018-09-27 | 2018-09-27 | SCR catalytic converter and box thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108979806A true CN108979806A (en) | 2018-12-11 |
| CN108979806B CN108979806B (en) | 2024-01-16 |
Family
ID=64542964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811130599.5A Active CN108979806B (en) | 2018-09-27 | 2018-09-27 | SCR catalytic converter and box thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108979806B (en) |
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|---|
| 孙富伟: "催化裂化外取热器开发与研究进展", 《现代化工》, pages 29 - 33 * |
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