CN202909643U - Gas mixing element and gas mixing device comprising same - Google Patents
Gas mixing element and gas mixing device comprising same Download PDFInfo
- Publication number
- CN202909643U CN202909643U CN201220546257.3U CN201220546257U CN202909643U CN 202909643 U CN202909643 U CN 202909643U CN 201220546257 U CN201220546257 U CN 201220546257U CN 202909643 U CN202909643 U CN 202909643U
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- China
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- gas
- plate
- hybrid element
- anemostat
- nozzle
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Abstract
The utility model provides a gas mixing element and a gas mixing device comprising the element. The gas mixing element comprises a spray nozzle, a diffusion pipe and a splash plate, wherein the diffusion pipe sequentially comprises a shrinkage part, a throat and an expansion part from the top down, the splash plate is a single-layered blind plate, the sectional area of the splash plate is larger than that of the outlet at the lower end of the expansion section, the outlet at the lower end of the spray nozzle extends into the shrinkage part of the diffusion pipe, and the splash plate is arranged below the expansion section. The gas mixing device comprises a gas spraying main pipe, a plurality of gas spraying branch pipes and a gas mixing element above, wherein one end of each gas spraying branch pipe is connected with the gas spraying main pipe, and the other end of each gas spraying branch pipe adopts a sealed structure; and the lower surfaces of the gas spraying branch pipes are connected with the gas mixing element. The utility model has the advantages of reasonable structure, fully mixed medium and excellent mixing effect.
Description
Technical field
The utility model relates to a kind of gas hydrid component, particularly a kind of gas hybrid element and gas mixer.
Background technology
In the existing gas mixer, general two media enters mixing chamber from import separately respectively, freely mixes getting final product, and its existence can not well-mixed problem.
In the gas denitrifying technology field, ammonia (NH
3) and nitrogen oxide (NO
x) mixed effect and the denitration efficiency of denitrification apparatus close relationship is arranged, if reducing agent and NO
xThat mixes is insufficient, can cause NH in the regional area
3/ NO
xMol ratio is excessively low, will greatly reduce system's denitration efficiency.In the case, want to reach NO
xThe discharge capacity index request certainly will increase the consumption of catalyst or the consumption of ammonia, causes operating cost to increase or the amount of ammonia slip increase, forms secondary pollution.
Traditional NH
3And NO
xUtilize NH in the mixed method
3And NO
xBetween concentration difference, mix by natural diffusion way, therefore need very long mixing distance and NH
3And NO
xUndercompounding.
CN201394414Y has introduced a kind of ejection ammonia mixed organization of SCR reaction unit, comprises a charging house steward and several distributing pipe; Lower surface at distributing pipe is provided with some nozzles, and is provided with accordingly the deflector that is comprised of several static mixing blades below nozzle; Nozzle is tubaeform, sprays resistance to reduce ammonia; The nozzle below is provided with induction tunnel accordingly, and this induction tunnel is the Venturi tube of large aditus laryngis, forms secondary drainage.The weak point of this mechanism is, the flue gas that induction tunnel sucks only accounts for about 30%～70% of total exhaust gas volumn, can't realize with flue gas fully mix impact spray ammonia effect.
CN101601965A has introduced a kind of ammonia-spraying grid device of SCR method denitrating flue gas, includes the ammonia-spraying grid that the metal tube bank forms, and the footpath of each root metal tube upwards is provided with nozzle; The angle of the opening direction of nozzle and flow of flue gas direction is 0 °～90 °.The weak point of this structure is, lacks turbulent element, causes linearly flowing along injection direction through the ammonia of nozzle ejection, can't realize with flue gas fully mix impact spray ammonia effect.
The utility model content
Not enough for prior art, the utility model provides a kind of gas hybrid element and has comprised the gas mixer of this hybrid element, is intended to solve in the prior art gas and mixes inhomogeneously, affects the problem of mixed effect.
The utility model provides a kind of gas hybrid element, described gas hybrid element comprises nozzle, anemostat and spatters plate, described anemostat comprises contraction section, trunnion and expansion segment from top to bottom successively, the described plate that spatters is the individual layer blind plate, spatter the plate sectional area greater than the lower end discharge area of expansion segment, nozzle lower end outlet is stretched in the contraction section, describedly spatters the below that plate is arranged at expansion segment.
In the gas hybrid element of the present utility model, the undergauge structure is adopted in the outlet of described nozzle lower end.The angle of throat of described anemostat contraction section is generally 10 °～60 °, preferred 15 °～30 °.The length of described trunnion is generally 1～4 times of throat pipe diameter, preferred 1～3 times.The angle of flare of described expansion segment is for being generally 7 °～30 °, preferred 10 °～20 °.
According to gas hybrid element described in the utility model, the described plate that spatters is the individual layer blind plate, and its shape can be circle or polygon, and preferable shape is consistent with outlet, anemostat lower end shape.Described nozzle, anemostat and the dead in line of spattering plate are spattered the plate sectional area greater than the lower end discharge area of expansion segment, and as calculated, the distance of spattering plate and expansion segment outlet horizontal cross-section is generally 30%～150% of length of throat, preferred 80%～120%.
Another technical problem to be solved in the utility model provides a kind of gas mixer.Described gas mixer comprises gas jet house steward, gas jet arm and gas hybrid element recited above; Wherein said gas jet arm arranges some, and gas jet arm one end is connected with the gas jet house steward, and the other end is enclosed construction; The lower surface of gas jet arm links to each other with described gas hybrid element by nozzle.
According to gas mixer described in the utility model, described gas mixer usually is arranged at reactor inlet or is separately set in the mixing chamber.Described gas jet arm be arranged in parallel be distributed in the reactor or mixing chamber in.
Gas hybrid element of the present utility model and comprise the gas mixer of this hybrid element, be applicable to mixed processes dustless in the gas or two kinds of gases that solid particulate matter content is lower, for example can be used as and a kind ofly spray ammonia element or ammonia-gas spraying device and be used for the mixed process of equipment for denitrifying flue gas ammonia and flue gas.
Compared with prior art, the beneficial effect of gas hybrid element of the present utility model and gas mixer is:
1, in the gas hybrid element of the present utility model, gas A enters the contraction section of anemostat through nozzle ejection, and in this acceleration, in contraction section, form little subnormal ambient, producing swabbing action sucks gas B in the contraction section, two kinds of gas mediums tentatively mix in contraction section, when passing through the trunnion of reduced cross-sectional area, the mist flow velocity is accelerated, thereby enter expansion segment with high flow velocities, in expansion segment, gas flow rate slows down so that the pressure of mist returns to substantially quite with the pressure of gas B, realizes that two kinds of gas phase I mix.Mist is ejected into via the expansion segment outlet and spatters on the plate, because spattering plate is blind plate structure, the gas of ejection forms in the whirlpool at the place of keeping to the side below spattering plate, what increased mist and the gas B that is not inhaled into anemostat mixes probability again, produce larger dispersion territory, realize that mist mixes with the second stage of the gas B that is not inhaled into anemostat, thereby further increased the mixture homogeneity of two kinds of gases, reduce and mix needed space, reduce investment outlay.
2, gas mixer of the present utility model is simple in structure, arrange rationally, the gas jet arm is arranged in parallel and is distributed in the reactor or in the mixing chamber, nozzle is along the intensive layout of reactor or mixing chamber cross section, each anemostat suction areas is overlapped, guarantee the even distribution of gas.
Description of drawings
Fig. 1 is the front view of the utility model gas hybrid element.
Fig. 2 is the front view of the utility model gas mixer.
The specific embodiment
Further specify concrete scheme and the occupation mode of the utility model gas hybrid element and gas mixer below in conjunction with accompanying drawing.
By shown in Figure 1, gas hybrid element 1 described in the utility model, described gas hybrid element 1 comprises nozzle 2, anemostat 3 and spatters plate 4, described nozzle 2, anemostat 3 and the dead in line of spattering plate 4, described anemostat 3 comprises contraction section 5, trunnion 6 and expansion segment 7 from top to bottom successively, the undergauge structure is adopted in nozzle 2 lower ends outlets, and stretches in the contraction section 5, describedly spatters the below that plate 4 is arranged at expansion segment 7.Gas A enters in the nozzle 2, and after nozzle 2 lower end undergauge structures increase flow velocity, spurt in the contraction section 5 of anemostat, the angle of throat of described contraction section 5 is 15 °～30 °, and in this continuation acceleration, at the little subnormal ambient of contraction section 5 interior formation, produce swabbing action gas B is sucked in the contraction section 5, two kinds of gases tentatively mix in contraction section 5; Mist is when passing through the trunnion 6 of reduced cross-sectional area, length of throat is 1～3 times of throat pipe diameter, the mist flow velocity is accelerated, thereby enter expansion segment 7 with high flow velocities, the angle of flare of expansion segment is 10 °～20 °, in expansion segment 7, the mist flow velocity slows down so that the pressure of mist returns to substantially quite with the pressure of gas B, realizes that two kinds of gas phase I mix.Mist is ejected into via the outlet of expansion segment 7 and spatters on the plate 4, the distance of spattering plate and expansion segment outlet horizontal cross-section is 80%～120% of length of throat, the described plate 4 that spatters adopts blind plate structure, spatter the plate shape consistent with outlet, anemostat lower end shape, spatter the plate sectional area greater than the lower end discharge area of expansion segment 7, utilization is spattered 4 pairs of simulation model for mixing gases flows of plate and is formed obstruction, the place of keeping to the side forms in the whirlpool below spattering plate 4 through spattering behind the plate 4 to make mist, what increase mist and the gas B that is not inhaled into anemostat 3 mixes probability again, and produce larger dispersion territory, realize that mist mixes with the gas B second stage that is not inhaled into anemostat.
As shown in Figure 2, gas mixer 8 described in the utility model comprises gas jet house steward 9, gas jet arm 10 and gas hybrid element 11 recited above; Wherein said gas jet arm 10 arranges some, and gas jet arm 10 1 ends are connected with gas jet house steward 9, and the other end is enclosed construction; Gas jet arm 10 links to each other with described gas hybrid element 11 by nozzle 2.Gas mixer 8 described in the utility model in use, gas A enters gas jet arm 10 through gas jet house steward 9, spray into anemostat contraction section 5 by the nozzle 2 on the gas jet arm 10, and in contraction section 5 interior acceleration, form negative pressuren zone, produce swabbing action and suck near the most of gas B of contraction section 5 entrances, mist passes trunnion 6 and enters anemostat expansion segment 7, and in expansion segment 7, slow down, realize that the phase I of two kinds of gases mixes; Mist is spattering the generation splash of plate 4 places, the place form to stay the whirlpool, increased with the gas B that is not inhaled into anemostat 3 mix again probability, and produce larger dispersion territory, realize that mist mixes with the gas B second stage that is not inhaled into anemostat, reach good mixed effect.
Claims (10)
1. gas hybrid element, described gas hybrid element comprises nozzle, anemostat and spatters plate, it is characterized in that: described anemostat comprises contraction section, trunnion and expansion segment from top to bottom successively, the described plate that spatters is the individual layer blind plate, spatter the plate sectional area greater than the lower end discharge area of expansion segment, nozzle lower end outlet is stretched in the anemostat contraction section, describedly spatters the below that plate is arranged at expansion segment.
2. according to hybrid element claimed in claim 1, it is characterized in that: the undergauge structure is adopted in the outlet of described nozzle lower end.
3. according to hybrid element claimed in claim 1, it is characterized in that: described contraction section angle of throat is 10 °～60 °, and length of throat is 1～4 times of throat pipe diameter, and the expansion segment angle of flare is 7 °～30 °.
4. according to hybrid element claimed in claim 1, it is characterized in that: described nozzle, anemostat and the dead in line of spattering plate.
5. according to hybrid element claimed in claim 1, it is characterized in that: described spatter plate be shaped as circle or polygon.
6. according to hybrid element claimed in claim 1, it is characterized in that: described shape of spattering plate is consistent with outlet, anemostat lower end shape.
7. according to hybrid element claimed in claim 1, it is characterized in that: described distance of spattering plate and expansion segment outlet horizontal cross-section is 30%～150% of length of throat.
8. gas mixer, described gas mixer comprises arbitrary described gas hybrid element in gas jet house steward, gas jet arm and the claim 1～7; Wherein said gas jet arm arranges some, and gas jet arm one end is connected with the gas jet house steward, and the other end is enclosed construction; The lower surface of gas jet arm links to each other with described gas hybrid element by nozzle.
9. according to device claimed in claim 8, it is characterized in that: described gas mixer is arranged at reactor inlet or is separately set in the mixing chamber.
10. according to device claimed in claim 9, it is characterized in that: described gas jet arm be arranged in parallel be distributed in the reactor or mixing chamber in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220546257.3U CN202909643U (en) | 2012-10-24 | 2012-10-24 | Gas mixing element and gas mixing device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220546257.3U CN202909643U (en) | 2012-10-24 | 2012-10-24 | Gas mixing element and gas mixing device comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202909643U true CN202909643U (en) | 2013-05-01 |
Family
ID=48157991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220546257.3U Expired - Lifetime CN202909643U (en) | 2012-10-24 | 2012-10-24 | Gas mixing element and gas mixing device comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202909643U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233686A (en) * | 2015-07-30 | 2016-01-13 | 北京哈泰克工程技术有限公司 | Matrix type ammonia spraying grille with mixing devices |
| CN105311959A (en) * | 2015-12-09 | 2016-02-10 | 光大环保（中国）有限公司 | Ammonia spraying grid for low-temperature SCR denitrification system |
| CN108067058A (en) * | 2016-11-09 | 2018-05-25 | 上海境业环保能源科技股份有限公司 | A kind of enhanced ripple chimney filter deduster |
| CN114082281A (en) * | 2020-08-07 | 2022-02-25 | 中国石油化工股份有限公司 | Mixing cover |
-
2012
- 2012-10-24 CN CN201220546257.3U patent/CN202909643U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233686A (en) * | 2015-07-30 | 2016-01-13 | 北京哈泰克工程技术有限公司 | Matrix type ammonia spraying grille with mixing devices |
| CN105233686B (en) * | 2015-07-30 | 2018-10-30 | 北京哈泰克工程技术有限公司 | A kind of matrix form ammonia-spraying grid with mixing arrangement |
| CN105311959A (en) * | 2015-12-09 | 2016-02-10 | 光大环保（中国）有限公司 | Ammonia spraying grid for low-temperature SCR denitrification system |
| CN108067058A (en) * | 2016-11-09 | 2018-05-25 | 上海境业环保能源科技股份有限公司 | A kind of enhanced ripple chimney filter deduster |
| CN114082281A (en) * | 2020-08-07 | 2022-02-25 | 中国石油化工股份有限公司 | Mixing cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |