CN102350217A - High-efficiency and low-resistance static mixer for selective catalytic reduction system - Google Patents
High-efficiency and low-resistance static mixer for selective catalytic reduction system Download PDFInfo
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- CN102350217A CN102350217A CN2011102648087A CN201110264808A CN102350217A CN 102350217 A CN102350217 A CN 102350217A CN 2011102648087 A CN2011102648087 A CN 2011102648087A CN 201110264808 A CN201110264808 A CN 201110264808A CN 102350217 A CN102350217 A CN 102350217A
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Abstract
The invention relates to the technical field of selective catalytic reduction and denitration of industrial gas, in particular to a high-efficiency and low-resistance static mixer which is used for a selective catalytic reduction and denitration device and has a reasonable structure, and a flow field organization effect, and by which ammonia gas and flue gas are mixed uniformly. Aiming at the problems of poor mixing effect, high running resistance, and the like in the static mixer in the conventional selective catalytic reduction and flue gas denitration device, the high-efficiency and low-resistance static mixer has a structure of reverse alternation and compact arrangement of a single static mixer, ammonia gas and flue gas vertically pass through the static mixer so as to form different baffling flows which are alternated and strongly disturb each other, turbulent mixing of flue gas and ammonia gas is enhanced, and concentration and speed of ammonia gas and flue gas are distributed more uniformly in a very short distance. The high-efficiency and low-resistance static mixer has a good effect of mixing the flue gas and ammonia gas, is low in running resistance, and is suitable for NOx selective catalytic reduction and denitration devices in fire coal industry, metallurgical industry, chemical industry and other industry.
Description
Technical field
The present invention relates to the selective-catalytic-reduction denitrified technical field of industrial smoke, relate in particular to a kind ofly be used for that selective catalytic reduction denitration device is rational in infrastructure, effective, ammonia is organized in the flow field and flue gas mixes efficient low-resistance static mixer.
Background technology
Selective catalytic reduction (SCR) is used widely in the nitrogen-containing oxide gas cleaning of industries such as big-and-middle-sized power station, metallurgy, chemical industry is handled removing characteristics such as the maturation that possesses skills aspect the NOx, removal efficiency are high, stable, non-secondary pollution thing at present.
The key problem in technology of selective catalytic reduction is tissue and obtains that ammonia is stablized with flue gas, mixed uniformly flow field, with abundant raising denitration efficiency, and reduces to the escaping of ammonia rate minimum.Along with the further raising that China's industry NOx emission control requires, the flow field that better and efficiently solves ammonia and flue gas organizes problem to become the core of technical application.
China's selective catalytic reduction denitration device often faces the limited realistic situation of arrangement space, and SCR inlet vertical section flue is too short, and the flue gas flow rate inhomogeneities is outstanding.Through being set, static mixer makes that to get into the SCR reaction system behind ammonia and the flue gas premix be one of common solution.But in present practical applications, the structure of some static mixer is too simple, though running resistance is low, mixed effect is poor; Some static mixer is attempted to improve mixed effect through complex mechanical construction, but brings harmful effects such as running resistance rising and dust stratification.
Technical problem to be solved by this invention is: 1. static mixer structure reasonable in design, improve flow field tissue effect, and ammonia and flue gas are mixed.2. when strengthening mixed effect, reduce running resistance.
Summary of the invention
The purpose of this invention is to provide the efficient low-resistance static mixer that a kind of rational in infrastructure, flow field organizes effective, ammonia and flue gas to mix, improve denitration efficiency and also reduce the escaping of ammonia rate.The present invention is low to good mixing effect, the running resistance of flue gas and ammonia, is applicable to the NOx selective catalytic reduction denitration device of industry such as fire coal, metallurgy and chemical industry.
For achieving the above object, every group of static mixer of the present invention rearranged by the parallel order of some monolithic static mixers, and two adjacent static mixers oppositely join, and successively alternately.Each monolithic static mixer close proximity, two ends are covered with whole flue cross section respectively with after the flue inwall is connected.The sheet number of flue sectional area size decision monolithic static mixer.
Described monolithic static mixer is made up of blender blade, blade connecting rod and lower blade connecting rod.Blender blade links to each other with blade connecting rod up and down at an angle, and is and is arranged in parallel.The length of blade connecting rod and flue width are equal to up and down, and link to each other with the flue inwall respectively.Monolithic static mixer upper and lower strut vertical interval is between 160mm-200mm, and adjacent blender blade is 160mm-180mm in the level interval between the blade rod connection point up and down, and the horizontal sextant angle between blender blade plane, place and upper and lower strut is 45
o-60
oBetween.
In the described monolithic static mixer; Can design different blender blade and the horizontal sextant angle between the blade connecting rod according to different flue gas flow field situation; And design different blender blade spacings and upper and lower strut vertical interval, to obtain the mixed effect of flue gas disturbance preferably.
Described static mixer blade rectangular shaped, thickness is 6mm, the bottom of attending of rectangle offers respectively and connects draw-in groove and link to each other with blade connecting rod up and down.The blender blade area of monolithic static mixer tail end reduces by half than other blender blade area, and only offers in the bottom of rectangle and connect draw-in groove and link to each other with the lower blade connecting rod.
The described static mixer height of blade connecting rod up and down is 30mm, and thickness is 6mm.
Described static mixer blade and blade connecting rod adopt the Q345 steel to make.
Compare with existing static mixer technology, the present invention has following characteristics:
(1) adopt the reverse version alternately of monolithic static mixer vertically to be arranged in the flue cross section, blender blade links to each other and is arranged in parallel with blade connecting rod up and down at an angle.Ammonia is vertical with flue gas through behind the static mixer, forms two kinds of alternate staggered different bafflings and strong the interference, has strengthened the turbulent flow of flue gas and ammonia and has mixed, and the CONCENTRATION DISTRIBUTION and the VELOCITY DISTRIBUTION that in than short distance, reach ammonia and flue gas are comparatively even.
(2) can design different blender blade and the horizontal sextant angle between the blade connecting rod according to different flue gas flow field situation, and design different blender blade spacings and upper and lower strut vertical interval, to obtain the mixed effect of flue gas disturbance preferably.
(3) the present invention is rational in infrastructure, is difficult for dust stratification, and running resistance is low.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed description.
Fig. 1 is the static mixer stereogram of patent of the present invention;
Fig. 2 is the monolithic static mixer stereogram of patent of the present invention;
Fig. 3 is the monolithic static mixer profile of patent of the present invention;
Fig. 4 is the blade linkage plane figure of patent of the present invention;
Fig. 5 is blender blade 1 plane of patent of the present invention;
Fig. 6 is blender blade 2 planes of patent of the present invention.
Among the figure: 1. the monolithic static mixer, 2. blender blade 1,3. blender blade 2,4. the blade connecting rod, 5. connect draw-in groove.
The specific embodiment
The reverse alternate tight arrangement of monolithic static mixer (1) among Fig. 1, blade connecting rod (4) two ends respectively with vertical being arranged on the flue cross section after the flue inwall is connected, and be covered with whole flue cross section.The sheet number of flue sectional area size decision monolithic static mixer.Monolithic static mixer (1) is made up of blender blade (2,3), blade connecting rod (4) and lower blade connecting rod (4).Blender blade (2,3) links to each other with blade connecting rod (4) up and down at an angle, and is and is arranged in parallel.The length of blade connecting rod (4) and flue width are equal to up and down, and link to each other with the flue inwall respectively.Monolithic static mixer (1) upper and lower strut (4) vertical interval is between 160mm-200mm; Adjacent blender blade (2; 3) be 160mm-180mm in the level interval between blade connecting rod (4) tie point up and down; Horizontal sextant angle between blender blade (2,3) plane, place and upper and lower strut is 45
o-60
oBetween.
Static mixer blade of the present invention (2,3) rectangular shaped, thickness is 6mm, the bottom of attending of rectangle offers respectively and connects draw-in groove (5) and link to each other with blade connecting rod (4) up and down.Blender blade (3) area of monolithic static mixer (1) tail end reduces by half than other blender blade (2) area, and only offers in the bottom of rectangle and connect draw-in groove (5) and link to each other with lower blade connecting rod (4).The static mixer height of blade connecting rod (4) up and down is 30mm, and thickness is 6mm.
Static mixer blade of the present invention (2,3) and blade connecting rod (4) adopt the Q345 steel to make.
Ammonia is vertical with flue gas through behind the static mixer, forms two kinds of alternate staggered different bafflings and strong the interference, has strengthened the turbulent flow of flue gas and ammonia and has mixed, and the CONCENTRATION DISTRIBUTION and the VELOCITY DISTRIBUTION that in than short distance, reach ammonia and flue gas are comparatively even.
In the implementation process of the present invention; Can be according to the different different blender blade (2 of flue gas flow field situation design; 3) and the horizontal sextant angle between blade connecting rod (4); And design different blender blade (2; 3) spacing and upper and lower strut (4) vertical interval is to obtain the mixed effect of flue gas disturbance preferably.
The present invention is low to good mixing effect, the running resistance of flue gas and ammonia, is applicable to the NOx selective catalytic reduction denitration device of industry such as fire coal, metallurgy and chemical industry.
The above-mentioned embodiment that only combines accompanying drawing exemplarily to describe patent of the present invention, but the concrete realization of patent of the present invention is not limited to aforesaid way.Any unsubstantiality that the technical scheme of patent of the present invention is carried out is changed the protection domain that all should be considered as patent of the present invention.
Claims (6)
1. efficient low-resistance static mixer that is used for selective catalytic reduction system operating; It is characterized in that: the reverse alternate tight arrangement of monolithic static mixer; Blade connecting rod two ends respectively with vertical being arranged on the flue cross section after the flue inwall is connected, and be covered with whole flue cross section.
2. a kind of efficient low-resistance static mixer that is used for selective catalytic reduction system operating according to claim 1, it is characterized in that: the monolithic static mixer is made up of blender blade, blade connecting rod and lower blade connecting rod.
3. a kind of efficient low-resistance static mixer that is used for selective catalytic reduction system operating according to claim 1 is characterized in that: blender blade links to each other with blade connecting rod up and down at an angle, and is and is arranged in parallel; The length of blade connecting rod and flue width are equal to up and down, and link to each other with the flue inwall respectively.
4. a kind of efficient low-resistance static mixer that is used for selective catalytic reduction system operating according to claim 1 is characterized in that: static mixer blade rectangular shaped, and the bottom of attending of rectangle offers respectively and connects draw-in groove and link to each other with blade connecting rod up and down; The blender blade area of monolithic static mixer tail end reduces by half than other blender blade area, and only offers in the bottom of rectangle and connect draw-in groove and link to each other with the lower blade connecting rod.
5. a kind of efficient low-resistance static mixer that is used for selective catalytic reduction system operating according to claim 1; It is characterized in that: monolithic static mixer upper and lower strut vertical interval is between 160mm-200mm; Adjacent blender blade is 160mm-180mm in the level interval between the blade rod connection point up and down, and the horizontal sextant angle between blender blade plane, place and upper and lower strut is 45
o-60
oBetween.
6. a kind of efficient low-resistance static mixer that is used for selective catalytic reduction system operating according to claim 1; It is characterized in that: can design different blender blade and the horizontal sextant angle between the blade connecting rod according to different flue gas flow field situation; And design different blender blade spacings and upper and lower strut vertical interval, to obtain the mixed effect of flue gas disturbance preferably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102648087A CN102350217A (en) | 2011-09-08 | 2011-09-08 | High-efficiency and low-resistance static mixer for selective catalytic reduction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102648087A CN102350217A (en) | 2011-09-08 | 2011-09-08 | High-efficiency and low-resistance static mixer for selective catalytic reduction system |
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| CN102350217A true CN102350217A (en) | 2012-02-15 |
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| CN2011102648087A Pending CN102350217A (en) | 2011-09-08 | 2011-09-08 | High-efficiency and low-resistance static mixer for selective catalytic reduction system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041702A (en) * | 2013-01-05 | 2013-04-17 | 中国计量学院 | SCR static mixer provided with artificial pine needle blades |
| CN105715341A (en) * | 2016-02-15 | 2016-06-29 | 东风朝阳朝柴动力环保科技有限公司 | Mixing flow spoiler for selective catalytic reduction system |
| CN111346508A (en) * | 2020-04-10 | 2020-06-30 | 西安西热锅炉环保工程有限公司 | A kind of flue partition mixer and method |
| CN114733379A (en) * | 2022-03-28 | 2022-07-12 | 江西国泰七零九科技有限公司 | Static mixer for emulsifying emulsion explosive and emulsifying method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006009608A (en) * | 2004-06-23 | 2006-01-12 | Hino Motors Ltd | Exhaust emission control device |
| CN201200864Y (en) * | 2008-05-16 | 2009-03-04 | 叶力平 | X-shaped static mixer of selective catalytic reduction and denitration system |
| WO2010105778A1 (en) * | 2009-03-20 | 2010-09-23 | Uhde Gmbh | Combined waste gas treatment of waste gas streams containing ammonia and nitrogen oxides in industrial plants |
| KR20110047020A (en) * | 2009-10-29 | 2011-05-06 | 주식회사 파나시아 | Exhaust gas denitrification system with reducing agent mixture and noise reduction structure |
| CN202237796U (en) * | 2011-09-08 | 2012-05-30 | 北京龙电宏泰环保科技有限公司 | High-efficiency and low-resistance static mixer for selective catalytic reduction system |
-
2011
- 2011-09-08 CN CN2011102648087A patent/CN102350217A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006009608A (en) * | 2004-06-23 | 2006-01-12 | Hino Motors Ltd | Exhaust emission control device |
| CN201200864Y (en) * | 2008-05-16 | 2009-03-04 | 叶力平 | X-shaped static mixer of selective catalytic reduction and denitration system |
| WO2010105778A1 (en) * | 2009-03-20 | 2010-09-23 | Uhde Gmbh | Combined waste gas treatment of waste gas streams containing ammonia and nitrogen oxides in industrial plants |
| KR20110047020A (en) * | 2009-10-29 | 2011-05-06 | 주식회사 파나시아 | Exhaust gas denitrification system with reducing agent mixture and noise reduction structure |
| CN202237796U (en) * | 2011-09-08 | 2012-05-30 | 北京龙电宏泰环保科技有限公司 | High-efficiency and low-resistance static mixer for selective catalytic reduction system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041702A (en) * | 2013-01-05 | 2013-04-17 | 中国计量学院 | SCR static mixer provided with artificial pine needle blades |
| CN103041702B (en) * | 2013-01-05 | 2014-07-23 | 中国计量学院 | SCR static mixer provided with artificial pine needle blades |
| CN105715341A (en) * | 2016-02-15 | 2016-06-29 | 东风朝阳朝柴动力环保科技有限公司 | Mixing flow spoiler for selective catalytic reduction system |
| CN111346508A (en) * | 2020-04-10 | 2020-06-30 | 西安西热锅炉环保工程有限公司 | A kind of flue partition mixer and method |
| CN114733379A (en) * | 2022-03-28 | 2022-07-12 | 江西国泰七零九科技有限公司 | Static mixer for emulsifying emulsion explosive and emulsifying method |
| CN114733379B (en) * | 2022-03-28 | 2022-12-13 | 江西国泰七零九科技有限公司 | Static mixer for emulsifying emulsion explosive and emulsifying method |
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Application publication date: 20120215 |