CN217421318U - Square SCR reaction device of high-power engine - Google Patents
Square SCR reaction device of high-power engine Download PDFInfo
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- CN217421318U CN217421318U CN202220825543.7U CN202220825543U CN217421318U CN 217421318 U CN217421318 U CN 217421318U CN 202220825543 U CN202220825543 U CN 202220825543U CN 217421318 U CN217421318 U CN 217421318U
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- box body
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- scr reaction
- power engine
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 26
- 238000004806 packaging method and process Methods 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 7
- 230000003197 catalytic effect Effects 0.000 claims description 4
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003546 flue gas Substances 0.000 abstract description 10
- 239000000779 smoke Substances 0.000 abstract description 8
- 238000005538 encapsulation Methods 0.000 abstract description 5
- 238000000746 purification Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 13
- 239000004202 carbamide Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003541 multi-stage reaction Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Classifications
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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 provides a square SCR reaction unit of high-power engine, relates to diesel engine exhaust purification treatment technical field, including the reactor box, is equipped with air cavity and the back chamber of giving vent to anger of going forward around the reactor box, is equipped with a plurality of encapsulation modules in the reactor box side by side, still is equipped with guiding device in the preceding air cavity of admitting air, between encapsulation module and the reactor box to and the design has the sealing liner between the encapsulation module. A flow guide device is arranged to uniformly guide the flue gas to the front end face of the packaging module, so that the speed distribution uniformity is ensured; arranging a sealing gasket to ensure that the smoke can only flow to the rear end through the catalyst in the packaging module; a wind shielding support is designed in front of the sealing gasket, so that direct impact of high-temperature smoke on the sealing gasket is avoided, and the sealing reliability is ensured; the rear end of the packaging module is provided with a module baffle plate to avoid the displacement of the packaging module caused by transportation or overload vibration; the strength of the box body is enhanced, and the mechanical reliability of the reactor box body is improved; the matching requirements of engines with different powers are met by adjusting the length and the parallel connection number of the packaging modules.
Description
Technical Field
The utility model relates to a diesel engine exhaust purification handles technical field, concretely relates to square SCR reaction unit of high-power engine.
Background
Selective Catalytic Reduction (SCR) can effectively solve NO while ensuring the dynamic property and the economical property of an engine X The problem of emission meets the requirements of environmental protection laws and regulations, and the technology is widely applied to the field of domestic automobile engines.
The basic working principle of SCR is to inject a reducing agent into the exhaust pipe of an engine through a urea injection device, and the reducing agent and NO are mixed under the action of a catalyst X Reaction takes place to convert NO X Emissions control is within regulatory limits. The whole system consists of a urea injection device, a control device, a urea mixing device and a reaction device.
The urea injection and control device constantly calculates the current required urea injection quantity according to the working condition of the engine, realizes the accurate control of the injection quantity and ensures that the ideal spraying characteristic is obtained after the urea is sprayed; in the urea mixing device, urea drops are quickly mixed with high-temperature waste gas to make urea absorb heat and decompose into NH 3 (ii) a Last NH 3 The reaction with NOX occurs in the SCR reaction device, so as to achieve the purpose of eliminating NOX emission.
The SCR technology is relatively mature in the field of automotive diesel engines, but the power of the automotive engines is small and does not exceed 480kW at most. With the continuous upgrading of environmental protection regulations, the non-road large diesel engine also needs to be matched with SCR technology to meet the requirements of emission regulations, the conventional diesel engine SCR reactor usually adopts a circular catalyst, and the circular catalyst has high pore density and high flow resistance, so that the requirement of a high-power engine on low back pressure cannot be met; in addition, the square SCR reactor in the market at present adopts the design structure of the fixed source SCR reactor, and due to the difference between the pulse exhaust and the stable exhaust of the fixed source of the diesel engine, the structure of the fixed source SCR reactor directly applied to the diesel engine has the conditions of poor mechanical reliability, structural resonance, poor sealing and the like in the using process.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a square SCR reaction unit of high-power engine, technical scheme is as follows:
a square SCR (selective catalytic reduction) reaction device of a high-power engine comprises a reactor box body, wherein a front air inlet cavity and a rear air outlet cavity are arranged in the front and the rear of the reactor box body, a packaging module is arranged in the reactor box body in parallel, and a flow guide device is further arranged in the front air inlet cavity.
And a sealing gasket is arranged between the packaging module and the inner wall of the reactor box body.
Each packaging module comprises a plurality of parallel-connected catalysts, and the sealing gasket is arranged between every two adjacent catalyst blocks.
And a wind shielding support is arranged on the front end face of each packaging module.
The wind shielding support is formed by welding a plurality of angle steels, and the angle steels are aligned with the sealing gasket in the front-back direction.
And a module baffle is arranged on the back surface of each packaging module.
The wind shielding support and the module baffle are welded with the reactor box body into a whole.
The top of the reactor box body is connected with a cover plate assembly through a box body flange.
And the rear air outlet cavity is connected with a rear exhaust temperature sensor and a rear nitrogen-oxygen sensor.
The rear air outlet cavity is connected with an air outlet pipe, and the air outlet pipe is connected with an air outlet flange.
The utility model has the advantages that:
the flow guide device is arranged in the front air inlet cavity, smoke is uniformly distributed on the front end face of the packaging module, and the uniformity of speed distribution is ensuredImproving the NOx conversion efficiency of the catalyst and reducing NH 3 Leakage;
sealing gaskets are adopted between the packaging modules and the reactor box body and between the packaging modules for sealing, so that the leakage of the flue gas from gaps between the packaging modules and the reactor box body and between the packaging modules is avoided, and the flue gas can only flow to the rear end through the catalyst in the packaging modules;
the wind shielding support is formed by welding and spot-welding a plurality of angle steels and is arranged at the front end of the packaging module, and each angle steel of the wind shielding support is aligned with the sealing gasket between the packaging module and the reactor box in the front-back direction, so that direct impact of high-temperature smoke on the sealing gasket is avoided, and the sealing reliability of the sealing gasket is ensured;
the module baffle is arranged at the rear end of the packaging module, so that the packaging module is prevented from shifting due to transportation or overload vibration, and the SCR efficiency is reduced;
the wind shielding bracket, the module baffle and the reactor box body are welded into a whole, so that the strength of the box body is enhanced, and the mechanical reliability of the reactor box body is improved;
the packaging modules are connected in parallel to increase the smoke flow area and reduce the flow resistance; the front and the back are connected in series to form two-stage or multi-stage reaction, so that the reaction time is increased, and the NOx conversion efficiency is ensured;
the matching requirements of engines with different powers can be met by adjusting the length and the parallel connection number of the packaging modules.
Drawings
In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the drawings used in the description of the embodiments and the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-an air inlet flange; 2, an air inlet pipe; 3-advance air cavity; 4-a flow guide device; 5-a wind shielding bracket; 6-packaging the module; 7-sealing gasket; 8-module baffle; 9-rear air outlet cavity; 10-a post-nitroxide sensor; 11-an air outlet flange; 12-an air outlet pipe; 13-rear exhaust temperature sensor; 14-a cover plate assembly; 15-box flange; 16-reactor box.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the square SCR reactor of the high-power engine comprises a reactor box 16, wherein a front air inlet cavity 3 and a rear air outlet cavity 9 are arranged in front of and behind the reactor box 16, a packaging module 6 is arranged in the reactor box 16 in parallel, and a flow guide device 4 is further arranged in the front air inlet cavity 3.
A sealing gasket 7 is arranged between the packaging module 6 and the inner wall of the reactor box 16.
Each packaging module 6 comprises a plurality of catalytic blocks connected in parallel, and a sealing gasket 7 is arranged between every two adjacent catalytic blocks.
And a wind shielding bracket 5 is arranged on the front end surface of each packaging module 6.
The wind-shielding bracket 5 is formed by welding a plurality of angle steels which are aligned with the sealing gasket 7.
The back of each packaging module 6 is also provided with a module baffle 8.
The wind shielding bracket 5 and the module baffle 8 are welded with the reactor box 16.
The top of the reactor tank 16 is connected to the cover plate assembly 14 by a tank flange 15.
The air inlet pipe 2 is connected to the air advancing cavity 3, and the air inlet flange 1 is connected to the air inlet pipe 2.
And the rear gas outlet cavity 9 is connected with a rear exhaust temperature sensor 13 and a rear nitrogen-oxygen sensor 10.
An air outlet pipe 12 is connected to the rear air outlet cavity 9, and an air outlet flange 11 is connected to the air outlet pipe 12.
The flow guide device 4 is arranged in the front air inlet cavity 3, and the flue gas is uniformly distributed on the front end surface of the packaging module 6, so that the uniformity of speed distribution is ensured, the NOx conversion efficiency of the catalyst is improved, and NH is reduced 3 Leakage;
the wind shielding support 5 is formed by welding and spot-welding a plurality of angle steels and is arranged at the front end of the packaging module 6, and each angle steel of the wind shielding support 5 is aligned with the sealing gasket 7 between the packaging module 6 and the reactor box 16 in a front-back mode, so that direct impact of high-temperature smoke on the sealing gasket 7 is avoided, and the sealing reliability of the sealing gasket 7 is ensured;
the module baffle 8 is arranged at the rear end of the packaging module 6, so that the packaging module 6 is prevented from shifting due to transportation or overload vibration, and the SCR efficiency is prevented from being reduced;
the wind shielding support 5, the module baffle 8 and the reactor box body 16 are welded into a whole, so that the box body strength is enhanced, and the mechanical reliability of the reactor box body 16 is improved;
the packaging modules 6 are connected in parallel to increase the smoke flow area and reduce the flow resistance; the front and the back are connected in series to form two-stage or multi-stage reaction, so that the reaction time is increased, and the NOx conversion efficiency is ensured;
the length and the parallel connection number of the packaging modules 6 can be adjusted to meet the matching requirements of engines with different powers.
The working principle of the device is as follows:
the engine flue gas firstly enters the urea mixing pipe, the flue gas and urea in the urea mixing pipe are fully mixed and then enter the air advancing cavity 3 through the air inlet flange 1, airflow with uniformly distributed speed is formed under the action of the flow guide device 4, and the airflow enters the packaging module 6.
The encapsulation module 6 is internally encapsulated with an SCR catalyst, and when smoke passes through the encapsulation module 6, NOx and NH are generated under the action of the SCR catalyst 3 Reacting to harmless N 2 。
The flue gas enters the rear gas outlet cavity 9 after passing through the front and rear two-layer packaging modules 6, and finally flows out of the SCR reaction device through the gas outlet flange 11 of the gas outlet pipe 12.
The tail end of the SCR reaction device is provided with an exhaust temperature sensor and an NOx sensor, and the NOx sensor is used for measuring the closed-loop regulation of NOx emission concentration and urea injection quantity; the exhaust temperature sensor is used for measuring the temperature of the flue gas as an input condition of the control system.
The gas inlet flange 1, the gas inlet pipe 2, the gas inlet cavity 3, the reactor box body 16, the box body flange 15, the rear gas outlet cavity 9, the gas outlet pipe 12 and the gas outlet flange 11 are welded together, and form a closed space after being assembled with the cover plate assembly 14.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (10)
1. The utility model provides a square SCR reaction unit of high-power engine which characterized in that: the reactor comprises a reactor box body (16), wherein a front air inlet cavity (3) and a rear air outlet cavity (9) are correspondingly arranged on opposite end walls of the reactor box body (16), a packaging module (6) is also arranged in parallel on the reactor box body (16), and a flow guide device (4) is also arranged in the front air inlet cavity (3).
2. The square SCR reaction device of the high-power engine as claimed in claim 1, wherein: and a sealing gasket (7) is arranged on the end face of the packaging module (6) opposite to the inner wall of the reactor box body (16).
3. The square SCR reaction device of the high-power engine as claimed in claim 2, wherein: each packaging module (6) comprises a plurality of catalytic modules which are arranged in parallel, and the sealing gasket (7) is also arranged between every two adjacent catalytic modules.
4. The square SCR reaction device of the high-power engine as claimed in claim 3, wherein: and a wind shielding support (5) is arranged on the front end face of each packaging module (6).
5. The square SCR reaction device of the high-power engine as claimed in claim 4, wherein: the wind shielding support (5) is formed by welding a plurality of angle steels, and the angle steels are aligned with the sealing gaskets (7).
6. The square SCR reaction device of claim 4, wherein: and a module baffle (8) is also arranged on the back surface of each packaging module (6).
7. The square SCR reaction device of the high-power engine as claimed in claim 6, wherein: the wind shielding support (5) and the module baffle (8) are welded with the reactor box body (16) into a whole.
8. The square SCR reaction device of the high-power engine as claimed in claim 1, wherein: the top of the reactor box body (16) is connected with a cover plate assembly (14) through a box body flange (15).
9. The square SCR reaction device of the high-power engine as claimed in claim 1, wherein: the air inlet pipe (2) is connected to the front air cavity (3), the air inlet flange (1) is connected to the air inlet pipe (2), the air outlet pipe (12) is connected to the rear air outlet cavity (9), and the air outlet flange (11) is connected to the air outlet pipe (12).
10. The square SCR reaction device of the high-power engine as recited in claim 1, wherein: and the rear air outlet cavity (9) is connected with a rear exhaust temperature sensor (13) and a rear nitrogen-oxygen sensor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220825543.7U CN217421318U (en) | 2022-04-11 | 2022-04-11 | Square SCR reaction device of high-power engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220825543.7U CN217421318U (en) | 2022-04-11 | 2022-04-11 | Square SCR reaction device of high-power engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217421318U true CN217421318U (en) | 2022-09-13 |
Family
ID=83182915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220825543.7U Active CN217421318U (en) | 2022-04-11 | 2022-04-11 | Square SCR reaction device of high-power engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217421318U (en) |
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2022
- 2022-04-11 CN CN202220825543.7U patent/CN217421318U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231027 Address after: Room 801-3, Gaoxin Building, North of Yuqing East Street, Yuqing Community, Xincheng Street, Gaoxin District, Weifang City, Shandong Province, 261041 Patentee after: Shandong Xiushi Environmental Protection Technology Co.,Ltd. Address before: 262700 East 1000 meters south of the intersection of Beihuan road and Tegang Road, Gucheng street, Shouguang City, Weifang City, Shandong Province Patentee before: SHANDONG KANGJUN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |