CN207229204U - Tail gas treatment device based on SCR technology - Google Patents
Tail gas treatment device based on SCR technology Download PDFInfo
- Publication number
- CN207229204U CN207229204U CN201721266134.3U CN201721266134U CN207229204U CN 207229204 U CN207229204 U CN 207229204U CN 201721266134 U CN201721266134 U CN 201721266134U CN 207229204 U CN207229204 U CN 207229204U
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- CN
- China
- Prior art keywords
- external shell
- tail gas
- treatment device
- catalyst carrier
- gas treatment
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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
-
- 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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- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses the tail gas treatment device based on SCR technology, including external shell and some supporting racks, NOx sensor and urea nozzle, supporting rack is equipped with catalyst carrier, catalyst carrier is coated with selective catalytic reduction catalysts, catalyst carrier is equipped with some through holes, external shell is equipped with installing port, external shell is equipped with air inlet and gas outlet, urea nozzle is located at external shell close to one end of air inlet, and NOx sensor is respectively positioned at external shell close to one end of gas outlet.According to the content of NOx in tail gas or the quantity of tail gas selective catalysis agent carrier of different nature.NOx sensor is used for the content for detecting nitrogen oxides when tail gas finally discharges, control system controls urea nozzle to spray the urea liquid (as reducing agent) to match according to the content of nitrogen oxides, is reduced into by the NOx in selective catalytic reduction catalysts tail gas for human body harmless nitrogen and water.
Description
Technical field
It the utility model is related to field of environment protection equipment, more particularly to a kind of tail gas treatment device based on SCR technology.
Background technology
NOx has environment huge harm as the major pollutants in tail gas.And the equipment such as existing diesel engine is arranged
Contain NOx in the tail gas put, all exist for human body and all kinds of animals and plants and threaten, in industrial development process and various production lifes
NOx emission is avoided to become extremely urgent in work.Particularly with the NOx in tail gas, close to the living area of the mankind, emission request is more
It is high.
Utility model content
The purpose of this utility model is to provide a kind of tail gas treatment device based on SCR technology, tail gas can be effectively removed
In NOx.
For this purpose, the utility model uses following technical scheme：
Tail gas treatment device based on SCR technology, including external shell and some supports in the external shell
Frame, NOx sensor and urea nozzle, support frame as described above are equipped with catalyst carrier, the catalyst carrier and the branch
Support is slidably connected, and the catalyst carrier is coated with selective catalytic reduction catalysts, if the catalyst carrier is equipped with
Dry through hole, the external shell are equipped with installing port, further include the hermatic door for closing the installing port, the hermatic door with
Sealing ring is equipped between the external shell, the external shell is equipped with air inlet and gas outlet, and the urea nozzle is located at
Close to one end of the air inlet, the NOx sensor is located at the external shell and goes out described in the external shell
One end of gas port.
Can be according to the content of NOx in tail gas or the quantity of tail gas selective catalysis agent carrier of different nature.Catalyst carries
Body is slidably connected with supporting rack, opens closing door and promotes external shell or pull-out external shell unusual catalyst carrier
It is convenient, add convenience during use.
Specifically, NOx sensor is used for the content for detecting nitrogen oxides when tail gas finally discharges, control system
Control urea nozzle to spray the urea liquid (as reducing agent) to match according to the content of nitrogen oxides, pass through selective catalysis
Reducing catalyst causes the NOx in tail gas to be reduced into for human body harmless nitrogen and water.
Specific reaction principle：
1. urea liquid decomposes as follows：
CO (NH2) 2+H2O=2NH3+CO2
2. the reduction reaction of NOx is as follows：
Standard reaction：4NH3+4NO+O2→4N2+6H2O
Slow reaction：6NO2+8NH3→7N2+1 2H2O
Fast reaction：NO+NO2+2NH3→2N2+3H2O
Preferably, the catalyst carrier is ceramic material or metal material.Ceramics or metal material are respectively provided with resistance to
The characteristic of high temperature, especially ceramic material have certain facilitation for the sufficient degree of upper reaction.
Preferably, the catalyst carrier includes upper frame and underframe, between the upper frame and the underframe
Equipped with some connection locating parts.Buffer part of the gap as reaction between upper frame and underframe, further promotes reaction
Fully carry out.
Preferably, the through hole is honeycomb hole, circular hole or square hole, but it is not limited to above-mentioned shape.
Preferably, the inner wall of the external shell is equipped with ammoxidation catalyst close to one end of the gas outlet.Into one
The leakage of the ammonia in order to prevent of step, ammoxidation catalyst is equipped with the inner wall of external shell close to one end of gas outlet, can
The leakage of ammonia is reduced, reduces secondary pollution and severe compromise caused by ammonia leakage.
Preferably, connected between the hermatic door and the external shell for screw.
Preferably, the inner wall of the through hole is completely covered in the selective catalytic reduction catalysts, ensure the strong of reaction
Degree.
Preferably, the external shell is stainless steel.
The beneficial effects of the utility model：According to the content of NOx in tail gas or tail gas selecting catalyst of different nature
The quantity of carrier.Catalyst carrier is slidably connected with supporting rack, open closing door by catalyst carrier promote external shell or
It is very convenient to pull out external shell, adds convenience during use.NOx sensor is final for detecting tail gas
The content of nitrogen oxides during discharge, control system control urea nozzle to spray the urea to match according to the content of nitrogen oxides
Solution (as reducing agent), is reduced into harmless for human body by the NOx in selective catalytic reduction catalysts tail gas
Nitrogen and water.
Brief description of the drawings
Fig. 1 is the structure diagram of the tail gas treatment device based on SCR technology of the utility model；
Fig. 2 is along the sectional view of line A-A in Fig. 1；
Fig. 3 is along the sectional view of line B-B in Fig. 1；
Fig. 4 is the structure diagram of the catalyst carrier of the utility model；
In figure：
1st, external shell；
2nd, supporting rack；
3rd, catalyst carrier；301st, upper frame；302nd, underframe；303rd, locating part is connected；
4th, through hole；
5th, hermatic door.
Embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
As shown in Figs 1-4, a kind of tail gas treatment device based on SCR technology, including external shell 1 and arranged on the outside
Some supporting racks 2, NOx sensor and urea nozzle in housing 1, support frame as described above 2 are equipped with catalyst carrier 3, institute
Catalyst carrier 3 to be stated to be slidably connected with support frame as described above 2, the catalyst carrier 3 is coated with selective catalytic reduction catalysts,
The catalyst carrier 3 is equipped with some through holes 4, and the external shell 1 is equipped with installing port, further includes for closing the peace
Fill the hermatic door 5 of mouth, be equipped with sealing ring between the hermatic door 5 and the external shell 1, the external shell 1 equipped with into
Gas port and gas outlet, the urea nozzle are located at the external shell 1 and are passed close to one end of the air inlet, the nitrogen oxides
Sensor is located at the external shell 1 close to one end of the gas outlet.
Can be according to the content of NOx in tail gas or the quantity of tail gas selective catalysis agent carrier 3 of different nature.Catalyst carries
Body 3 is slidably connected with supporting rack 2, opens closing door and promotes external shell 1 or pull-out external shell 1 equal catalyst carrier 3
It is very convenient, add convenience during use.
Specifically, NOx sensor is used for the content for detecting nitrogen oxides when tail gas finally discharges, control system
Control urea nozzle to spray the urea liquid (as reducing agent) to match according to the content of nitrogen oxides, pass through selective catalysis
Reducing catalyst causes the NOx in tail gas to be reduced into for human body harmless nitrogen and water.
Specific reaction principle：
1. urea liquid decomposes as follows：
CO (NH2) 2+H2O=2NH3+CO2
2. the reduction reaction of NOx is as follows：
Standard reaction：4NH3+4NO+O2→4N2+6H2O
Slow reaction：6NO2+8NH3→7N2+1 2H2O
Fast reaction：NO+NO2+2NH3→2N2+3H2O
In this present embodiment, the catalyst carrier 3 is ceramic material or metal material.Ceramics or metal material have
There are heat safe characteristic, especially ceramic material that there is certain facilitation for the sufficient degree of upper reaction.
In this present embodiment, the catalyst carrier 3 includes upper frame 301 and underframe 302, the upper frame 301 with
Some connection locating parts 303 are equipped between the underframe 302.Gap between upper frame 301 and underframe 302 is as reaction
Buffer part, further promote the abundant progress of reaction.
In this present embodiment, the through hole 4 is honeycomb hole, circular hole or square hole, but is not limited to above-mentioned shape.
In this present embodiment, the inner wall of the external shell 1 is equipped with ammoxidation catalyst close to one end of the gas outlet.
The further leakage of ammonia in order to prevent, ammoxidation catalyst is equipped with the inner wall of external shell 1 close to one end of gas outlet,
The leakage of ammonia can be reduced, reduces secondary pollution and severe compromise caused by ammonia leakage.
In this present embodiment, connected between the hermatic door 5 and the external shell 1 for screw.
In this present embodiment, the inner wall of the through hole 4 is completely covered in the selective catalytic reduction catalysts, ensures reaction
Intensity.
In this present embodiment, the external shell 1 is stainless steel.
Obviously, above-described embodiment of the utility model is used for the purpose of clearly illustrating the utility model example, and
It is not the restriction to the embodiment of the utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
It is exhaustive.All any modification, equivalent and improvement made where within the spirit and principles of the present invention etc., should be included in
Within the protection domain of the utility model claims.
Claims (8)
1. the tail gas treatment device based on SCR technology, it is characterised in that including external shell and in the external shell
Some supporting racks, NOx sensor and urea nozzle, support frame as described above are equipped with catalyst carrier, the catalyst carrier
It is slidably connected with support frame as described above, the catalyst carrier is coated with selective catalytic reduction catalysts, the catalyst carrier
Some through holes are equipped with, the external shell is equipped with installing port, further includes the hermatic door for closing the installing port, described
Sealing ring is equipped between hermatic door and the external shell, the external shell is equipped with air inlet and gas outlet, the urea
Nozzle is located at the external shell close to one end of the air inlet, and the NOx sensor is located at the external shell and leans on
One end of the nearly gas outlet.
2. the tail gas treatment device according to claim 1 based on SCR technology, it is characterised in that the catalyst carrier
For ceramic material or metal material.
3. the tail gas treatment device according to claim 2 based on SCR technology, it is characterised in that the catalyst carrier
Including upper frame and underframe, some connection locating parts are equipped between the upper frame and the underframe.
4. the tail gas treatment device according to claim 3 based on SCR technology, it is characterised in that the through hole is honeycomb
Hole, circular hole or square hole.
5. the tail gas treatment device according to claim 1 based on SCR technology, it is characterised in that the external shell
Inner wall is equipped with ammoxidation catalyst close to one end of the gas outlet.
6. the tail gas treatment device according to claim 1 based on SCR technology, it is characterised in that the hermatic door and institute
State and connected for screw between external shell.
7. the tail gas treatment device according to claim 1 based on SCR technology, it is characterised in that the selective catalysis
The inner wall of the through hole is completely covered in reducing catalyst.
8. the tail gas treatment device according to claim 1 based on SCR technology, it is characterised in that the external shell is
Stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721266134.3U CN207229204U (en) | 2017-09-28 | 2017-09-28 | Tail gas treatment device based on SCR technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721266134.3U CN207229204U (en) | 2017-09-28 | 2017-09-28 | Tail gas treatment device based on SCR technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207229204U true CN207229204U (en) | 2018-04-13 |
Family
ID=61851016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721266134.3U Active CN207229204U (en) | 2017-09-28 | 2017-09-28 | Tail gas treatment device based on SCR technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207229204U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878201A (en) * | 2020-08-28 | 2020-11-03 | 河南柴油机重工有限责任公司 | Fixing device, SCR reaction device, use method and application |
-
2017
- 2017-09-28 CN CN201721266134.3U patent/CN207229204U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878201A (en) * | 2020-08-28 | 2020-11-03 | 河南柴油机重工有限责任公司 | Fixing device, SCR reaction device, use method and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200420 Address after: 523808 room 206, unit 1, building 1, No.1, Nanshan Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee after: Lvlian purification technology (Dongguan) Co.,Ltd. Address before: 523000 Guangdong, Dongguan Songshan Lake high tech Industrial Development Zone, Nanshan Road, No. 1 chi chi Valley, building A205, No. 1 Patentee before: GUANGDONG LEEGOOL PURIFIER EQUIPMENT Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 523000 Room 102, building 1, No. 7, Xinzhu Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee after: Lvlian purification technology (Dongguan) Co.,Ltd. Address before: 523808 room 206, unit 1, building 1, No.1, Nanshan Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee before: Lvlian purification technology (Dongguan) Co.,Ltd. |