CN103962023A - Rotary jet mixer of SCR (Selective Catalytic Reduction) system - Google Patents
Rotary jet mixer of SCR (Selective Catalytic Reduction) system Download PDFInfo
- Publication number
- CN103962023A CN103962023A CN201410195423.3A CN201410195423A CN103962023A CN 103962023 A CN103962023 A CN 103962023A CN 201410195423 A CN201410195423 A CN 201410195423A CN 103962023 A CN103962023 A CN 103962023A
- Authority
- CN
- China
- Prior art keywords
- impeller
- rotary jet
- conduit
- saddle
- vane wheel
- 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
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract description 4
- 239000012530 fluid Substances 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 abstract description 11
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- 230000000712 assembly Effects 0.000 description 10
- 238000000429 assembly Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000004202 carbamide Substances 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Nozzles (AREA)
Abstract
The invention aims to provide a rotary jet mixer of a SCR (Selective Catalytic Reduction) system. The rotary jet mixer of the SCR system comprises a shell, a vane wheel, a pipe support bracket and a rotation joint, wherein the pipe support bracket is fixed in the shell in a direction parallel to the end face of the shell; the rotation joint is fixed on the pipe support bracket; a vane wheel shaft is connected with the rotation joint; the vane wheel is mounted at the end of the vane wheel shaft; a guide pipe is mounted on each vane wheel; the guide pipes are capable of rotating along with the vane wheels; spraying heads are mounted on the guide pipes; the vane wheel shaft and the pipe support bracket are hollow structures; the vane wheel shaft is communicated with the hollow structures of the pipe support bracket; the guide pipes are communicated with the hollow structures of the vane wheel shaft; a connection joint is mounted on the outer wall of the shell and communicated with the pipe support bracket. The rotary jet mixer is simple in structure, convenient to assemble, disassemble and maintain, capable of mixing fully and operating without blockage; the rotary jet mixer is integrated with functions of jetting and mixing; the rotary jet mixer is applicable to the field of gas-gas mixture and gas-liquid mixture and especially applicable to a mixture of carbamide solution and smoke in the selective catalytic reduction (SCR) system.
Description
Technical field
What the present invention relates to is a kind of injection, mixing arrangement, specifically for injection, the mixing arrangement of SCR system.
Background technology
At present, the discharged nitrous oxides in application choice catalytic reduction (SCR) Techniques For Reducing flue gas is more and more extensive.Adopt aqueous solution of urea very convenient as the reducing agent of SCR denitration reaction, and safety.Aqueous solution of urea sprays in flue, and the ammonia that aqueous solution of urea decomposes generates and the reaction of nitrogen oxides in flue gas generate nitrogen G&W.Therefore, this just requires the ammonia must be even with flue gas blending before entering SCR reactor, otherwise will cause higher ammonia slipping ratio and lower denitration rate.
Conventionally before SCR reactor, install static mixer additional and promote mixing of ammonia and flue gas, the number of blender is more, mixes more evenly, and the pressure loss is also larger.Therefore,, when effectively promoting that ammonia mixes with flue gas, must guarantee that the pressure loss of static mixer can not be excessive.In actual SCR system, the aqueous solution of urea of ejection often can not decompose completely, can produce crystallization, stick on inner-walls of duct and static mixer, so, when static mixer is installed, must consider the crystallization of urea, make static mixer be difficult for stopping up, and easy installation and removal, be convenient to clean.
Existing static mixer, is applied in SCR system, and the pressure loss producing is on the one hand larger, the inconvenience of the easy blocking mixer of urea crystals, and installing/dismounting on the other hand.
Summary of the invention
The object of the present invention is to provide the SCR system rotary jet type blender that integrates urea-spray, flue gas and ammonia mixed function.
The object of the present invention is achieved like this:
SCR system rotary jet type blender of the present invention, it is characterized in that: comprise housing, impeller, saddle, swivel joint, saddle is fixed in housing along the direction parallel with housing end face, swivel joint is fixed on saddle, impeller shaft is connected with swivel joint, impeller is arranged on the end of impeller shaft, the conduit together rotating with it is all installed on each impeller, mounting spray head on conduit, described impeller shaft and saddle are hollow structure, the hollow structure of impeller shaft and saddle communicates, conduit communicates with the hollow structure of impeller shaft, on housing outer wall, be installed on the connector that saddle is connected.
The present invention can also comprise:
1, the Way out of conduit is identical with the fluid flow direction that enters housing or contrary.
2, described impeller has three at least, and the conduit on each impeller is at least installed two shower nozzles, and the axis of impeller is consistent with the axis of housing, and the windward side of impeller is vertical with airintake direction.
3, the conduit on impeller is as for the end face of impeller, by wind face or be embedded in impeller inside.
Advantage of the present invention is: the present invention is simple in structure, dismounting is easy to maintenance, mix fully, move clog-free, integrate and spray and mixed function, be applicable to the field of gas-air mixer, gas-liquid mixing, be particularly useful for mixing of SCR (SCR) system urea liquid and flue gas.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the cutaway view of the Way out of conduit of the present invention when identical with the fluid flow direction that enters housing;
Fig. 3 is the stereogram of the Way out of conduit of the present invention when identical with the fluid flow direction that enters housing;
Fig. 4 is the cutaway view of the Way out of conduit of the present invention when contrary with the fluid flow direction that enters housing.
The specific embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
In conjunction with Fig. 1～4, after rotary jet type blender is positioned over gas to be mixed, rotary jet type blender forms by being placed in the impeller 2 in housing 1 and the ejection assemblies being fixed on impeller 2.Impeller blade quantity is four, and impeller 2 axles are hollow axis body, and the axle of impeller 2 is connected with swivel joint 5, and swivel joint 5 is fixed on saddle 6, and saddle 6 is the hollow bodys with support strength.Ejection assemblies is comprised of shower nozzle 3 and conduit 4, wherein on each rotating vane, arranges 3 shower nozzles 3, spacing 25mm.Conduit 4 is fixed on the end face of rotating vane 2; Connector 7 outside ejection assemblies, impeller shaft, swivel joint 5, saddle 6 and housing 1 has formed the injection line system of a connection; All component material is stainless steel.
After rotary jet type blender is connected to unmixed gas pipeline, when air-flow passes through, under the effect of stream pressure, impeller 2 is produced to rotatablely move, and stir air-flow and produce bumpy flow 10, the fluid fluid of 3 shower nozzles, 3 ejections on impeller 2 is that downstream injection imports in bumpy flow 10 together with incoming flow simultaneously, and multiple gases constantly produces spiral helicine rotatablely moving in bumpy flow 10 like this, thereby makes the more even of fluid mixing.
The Way out of conduit is that Fluid injection direction is following current or upstream injection.
Fluid injection direction is applicable to the situation of gas-liquid mixing while being downstream injection, Fluid injection direction is more suitable for the situation of gas-air mixer while being upstream injection.
The technical solution used in the present invention is:
By the ejection assemblies that is placed in the impeller in housing and be fixed on impeller, formed, impeller shaft and swivel joint are tightly connected, swivel joint is fixed on the saddle of inner walls, and saddle is the hollow body with support strength, and saddle is communicated with the connector outside housing.The quantity of impeller blade is at least three, and impeller shaft is hollow axis body; Ejection assemblies is comprised of shower nozzle and conduit, and the quantity of each blade upper nozzle is at least two, and has each other certain spacing.Connector outside ejection assemblies, hollow axis body, swivel joint, saddle and housing forms the pipeline spraying system of a connection, and the axis of rotating vane is consistent with housing axis, and the windward side of blade is vertical with airintake direction.
The invention provides a kind of method of utilizing rotary jet type blender to carry out gas-gas, gas-liquid mixing, after rotary jet type blender is arranged on to gas to be mixed, when air-flow passes through, under the effect of stream pressure, impeller is produced and rotatablely move, and stir air-flow generation bumpy flow, the fluid of a plurality of shower nozzles ejections on impeller imports in bumpy flow together with incoming flow simultaneously, fluid constantly produces spiral helicine rotatablely moving in bumpy flow like this, and then mixes.
SCR system rotary jet type blender of the present invention, comprise the impeller 2 being placed in housing 1 and be fixed on the ejection assemblies on impeller 2, and for connecting swivel joint 5 and the passive saddle 6 of impeller 2, impeller in housing 12 and be fixed on the ejection assemblies on impeller 2, by impeller shaft and swivel joint 5, be tightly connected, swivel joint 5 is fixed on the saddle 6 of housing 1 inwall, saddle 6 is communicated with the connector 7 outside housing 1, the axis of impeller 2 is consistent with housing 1 axis, and the windward side of impeller 2 is vertical with airintake direction 8.
Impeller 2 is wind rotors, and under the effect that is subject to stream pressure, generation rotatablely moves, and is with moving air flow to produce bumpy flow 10 simultaneously.
The quantity of impeller 2 blades is at least three, and impeller shaft is hollow axis body.
Ejection assemblies is comprised of shower nozzle 3 and conduit 4.
Saddle 6 is the hollow bodys with support strength.
Connector 7 outside ejection assemblies, hollow axis body, swivel joint 5, saddle 6 and housing 1 has formed the pipeline spraying system of a connection.
Each parts of rotary jet type blender are high temperature resistant, corrosion resistant metal or nonmetal.
The quantity of each blade upper nozzle 3 is at least two, and has each other certain spacing.
Conduit 4 is placed in end face or the lee face of blade or buries in blade interior.
After rotary jet type blender is connected to gas to be mixed, when air-flow passes through, under the effect of stream pressure, impeller 2 produces and rotatablely moves, and stir air-flow and produce bumpy flow 10, the fluid of shower nozzle 3 ejections on impeller 2 imports in bumpy flow 10 together with incoming flow simultaneously, and fluid constantly produces spiral helicine rotatablely moving in bumpy flow 10 like this, and then mixes.
Claims (5)
1.SCR system rotary jet type blender, it is characterized in that: comprise housing, impeller, saddle, swivel joint, saddle is fixed in housing along the direction parallel with housing end face, swivel joint is fixed on saddle, impeller shaft is connected with swivel joint, impeller is arranged on the end of impeller shaft, the conduit together rotating with it is all installed on each impeller, mounting spray head on conduit, described impeller shaft and saddle are hollow structure, the hollow structure of impeller shaft and saddle communicates, conduit communicates with the hollow structure of impeller shaft, on housing outer wall, be installed on the connector that saddle is connected.
2. SCR system rotary jet type blender according to claim 1, is characterized in that: the Way out of conduit is identical with the fluid flow direction that enters housing or contrary.
3. SCR system rotary jet type blender according to claim 1 and 2, it is characterized in that: described impeller has three at least, conduit on each impeller is at least installed two shower nozzles, and the axis of impeller is consistent with the axis of housing, and the windward side of impeller is vertical with airintake direction.
4. SCR system rotary jet type blender according to claim 1 and 2, is characterized in that: the conduit on impeller is as for the end face of impeller, by wind face or be embedded in impeller inside.
5. SCR system rotary jet type blender according to claim 3, is characterized in that: the conduit on impeller is as for the end face of impeller, by wind face or be embedded in impeller inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195423.3A CN103962023B (en) | 2014-05-09 | 2014-05-09 | SCR system rotary jet type blender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195423.3A CN103962023B (en) | 2014-05-09 | 2014-05-09 | SCR system rotary jet type blender |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103962023A true CN103962023A (en) | 2014-08-06 |
| CN103962023B CN103962023B (en) | 2015-09-30 |
Family
ID=51232312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410195423.3A Expired - Fee Related CN103962023B (en) | 2014-05-09 | 2014-05-09 | SCR system rotary jet type blender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103962023B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492245A (en) * | 2014-12-22 | 2015-04-08 | 湖南凌峰环保科技有限公司 | Two-way oppositely charging type lime slurry spray nozzle |
| CN107899397A (en) * | 2017-11-23 | 2018-04-13 | 宁波江北清纬环保科技有限公司 | Prevent the gas purifier blocked |
| CN109458676A (en) * | 2018-11-01 | 2019-03-12 | 德州瑞诚空调设备有限公司 | A kind of central air-conditioning ventilation equipment of adjustable air humidification degree |
| WO2020092012A1 (en) * | 2018-10-31 | 2020-05-07 | Caterpillar Inc. | Multi-nozzle design to eliminate downstream mixing devices |
| CN111672422A (en) * | 2020-06-12 | 2020-09-18 | 周风爱 | Feeding mechanism of polymerization reaction device |
| CN112090276A (en) * | 2020-08-28 | 2020-12-18 | 山东方大清洁能源科技有限公司 | Atomizing and spraying device for SCR denitration |
| CN113244770A (en) * | 2021-06-25 | 2021-08-13 | 南通腾宇环保设备有限公司 | Exhaust gas aftertreatment device for dosing liquid exhaust gas aftertreatment agent |
| CN114797431A (en) * | 2022-01-19 | 2022-07-29 | 上海隆麦机械设备工程有限公司 | Combined denitration device based on SNCR and SCR |
| CN115121114A (en) * | 2022-05-07 | 2022-09-30 | 华能山东发电有限公司众泰电厂 | Boiler denitration inlet flue structure capable of sufficiently promoting mixing |
| US11525380B2 (en) | 2019-01-11 | 2022-12-13 | Cummins Emission Solutions Inc. | Aftertreatment system with multiple dosing modules |
| CN117046339A (en) * | 2023-10-13 | 2023-11-14 | 山西和运能源服务有限公司 | Intelligent mixing and utilizing device for high-low negative pressure gas of coal mine |
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2014
- 2014-05-09 CN CN201410195423.3A patent/CN103962023B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US2004840A (en) * | 1931-10-12 | 1935-06-11 | Eduard Ferdinand Van Suchtelen | Apparatus for dispersing liquids and mixtures |
| JPH11319745A (en) * | 1998-05-08 | 1999-11-24 | Sugino Mach Ltd | Stripping apparatus |
| US20070101700A1 (en) * | 2003-09-19 | 2007-05-10 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification apparatus of engine |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492245A (en) * | 2014-12-22 | 2015-04-08 | 湖南凌峰环保科技有限公司 | Two-way oppositely charging type lime slurry spray nozzle |
| CN107899397A (en) * | 2017-11-23 | 2018-04-13 | 宁波江北清纬环保科技有限公司 | Prevent the gas purifier blocked |
| WO2020092012A1 (en) * | 2018-10-31 | 2020-05-07 | Caterpillar Inc. | Multi-nozzle design to eliminate downstream mixing devices |
| US10774718B2 (en) | 2018-10-31 | 2020-09-15 | Caterpillar Inc. | Multi-nozzle design to eliminate downstream mixing devices |
| CN109458676A (en) * | 2018-11-01 | 2019-03-12 | 德州瑞诚空调设备有限公司 | A kind of central air-conditioning ventilation equipment of adjustable air humidification degree |
| US11525380B2 (en) | 2019-01-11 | 2022-12-13 | Cummins Emission Solutions Inc. | Aftertreatment system with multiple dosing modules |
| CN111672422B (en) * | 2020-06-12 | 2022-04-05 | 东营市东达机械制造有限责任公司 | Feeding mechanism of polymerization reaction device |
| CN111672422A (en) * | 2020-06-12 | 2020-09-18 | 周风爱 | Feeding mechanism of polymerization reaction device |
| CN112090276A (en) * | 2020-08-28 | 2020-12-18 | 山东方大清洁能源科技有限公司 | Atomizing and spraying device for SCR denitration |
| CN113244770A (en) * | 2021-06-25 | 2021-08-13 | 南通腾宇环保设备有限公司 | Exhaust gas aftertreatment device for dosing liquid exhaust gas aftertreatment agent |
| CN114797431A (en) * | 2022-01-19 | 2022-07-29 | 上海隆麦机械设备工程有限公司 | Combined denitration device based on SNCR and SCR |
| CN114797431B (en) * | 2022-01-19 | 2023-12-12 | 上海隆麦机械设备工程有限公司 | Combined denitration device based on SNCR and SCR |
| CN115121114A (en) * | 2022-05-07 | 2022-09-30 | 华能山东发电有限公司众泰电厂 | Boiler denitration inlet flue structure capable of sufficiently promoting mixing |
| CN117046339A (en) * | 2023-10-13 | 2023-11-14 | 山西和运能源服务有限公司 | Intelligent mixing and utilizing device for high-low negative pressure gas of coal mine |
| CN117046339B (en) * | 2023-10-13 | 2023-12-15 | 山西和运能源服务有限公司 | Intelligent mixing and utilizing device for high-low negative pressure gas of coal mine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103962023B (en) | 2015-09-30 |
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