CN213528132U - Denitration ammonia and flue gas mixed state vortex device - Google Patents
Denitration ammonia and flue gas mixed state vortex device Download PDFInfo
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- CN213528132U CN213528132U CN202022225062.6U CN202022225062U CN213528132U CN 213528132 U CN213528132 U CN 213528132U CN 202022225062 U CN202022225062 U CN 202022225062U CN 213528132 U CN213528132 U CN 213528132U
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- Prior art keywords
- ammonia
- denitration
- flue
- flue gas
- gas mixed
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 50
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000003546 flue gas Substances 0.000 title claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 abstract description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 abstract description 3
- 235000011130 ammonium sulphate Nutrition 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
A denitration ammonia and flue gas mixed state flow disturbing device belongs to the field of environment-friendly equipment. This denitration ammonia and flue gas mixed state vortex device includes denitration flue (1), support crossbeam (3) and vortex piece (4), installs in denitration flue (1) and spouts ammonia mechanism, and support crossbeam (3) are fixed in denitration flue (1) inboard, and support crossbeam (3) are located the export one side that spouts ammonia mechanism, and vortex piece (4) are fixed on support crossbeam (3). The utility model discloses a vortex effect of vortex spare (4) reinforcing ammonia and flue gas is strengthened the mixture of flue gas and ammonia for the regional comparatively even ammonia-cigarette mixed flow field that forms of denitration, the ammonia of solving the escape in afterbody flue with SO3The reaction generates cohesive ammonium sulfate/ammonium bisulfate, which easily causes the problems of corrosion and ash deposition blockage of the air preheater and the tail flue, and improves the denitration efficiency.
Description
Technical Field
A denitration ammonia and flue gas mixed state flow disturbing device belongs to the field of environment-friendly equipment.
Background
In recent years, due to the increasing deterioration of the environment, countries around the world have been increasingly concerned about emissions from thermal power plants, and a series of increasingly strict emission limit standards have been established. Among them, the flue gas discharged from thermal power plants contains a large amount of nitrogen oxides (NOx), which are one of the main pollutants of coal-fired flue gas.In the actual production process, the Selective Catalytic Reduction (SCR) denitration technology is a technology that is applied to the mature treatment of nitrogen oxides after combustion, and is widely adopted. The denitration performance and the economical efficiency of the SCR are mainly influenced by the mixing degree of the flue gas and the ammonia gas. The existing SCR is easy to generate the uneven distribution of denitration ammonia injection concentration fields, which leads to the ammonia-nitrogen ratio (NH) distributed in the flue flow field3/NOx) imbalance, the denitration efficiency decreases. In order to control the NOx emission to reach the relevant pollution emission standard, the ammonia spraying amount is increased, the ammonia escape is increased, a series of hazards caused by ammonia escape are caused, and the escaped ammonia and SO are mixed in a tail flue3The reaction generates cohesive ammonium sulfate/ammonium bisulfate, which is easy to cause corrosion and ash deposition blockage of the air preheater and the tail flue. The mixing degree of flue gas and ammonia is improved, denitration efficiency can be improved, denitration technology economy is improved, blockage and corrosion of the internal structure of the boiler are reduced, and the service life of the boiler is prolonged. Therefore, the uniform distribution of ammonia and smoke flow fields in the denitration area is an urgent problem to be solved in the SCR denitration process of the thermal power plant.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the denitration ammonia and smoke mixed-state turbulence device overcomes the defects of the prior art, enhances the mixing of smoke and ammonia gas, enables a denitration area to form a uniform ammonia-smoke mixed flow field, and improves the denitration efficiency.
The utility model provides a technical scheme that its technical problem adopted is: this denitration ammonia and flue gas mixed state vortex device, its characterized in that: the denitration flue comprises a denitration flue, a support cross beam and a turbulence piece, wherein an ammonia spraying mechanism is installed in the denitration flue, the support cross beam is fixed on the inner side of the denitration flue, the support cross beam is located on one side of an outlet of the ammonia spraying mechanism, and the turbulence piece is fixed on the support cross beam.
Preferably, the ammonia injection mechanism is an ammonia injection grid.
Preferably, a plurality of support beams are fixed in the denitration flue, a spoiler is fixed on each support beam, and the spoilers on adjacent support beams are arranged in a staggered manner.
Preferably, the plurality of support beams are arranged in parallel and at equal intervals.
Preferably, the plurality of spoilers on the bracket beam are equally spaced.
Preferably, the turbulence piece is of a spiral structure, and the axial direction of the turbulence piece is the same as the flow direction of flue gas in the denitration flue.
Preferably, the spoiler comprises a guide cylinder and a spoiler spiral plate, and the spoiler spiral plate is fixed on the outer side of the guide cylinder.
Preferably, the support beam is fixed at the tail of the denitration flue.
Preferably, the cross section of the denitration flue is rectangular, and the support beams are arranged in parallel along the long edge of the denitration flue.
Compared with the prior art, the denitration ammonia and flue gas mixed-state flow disturbing device has the beneficial effects that: the utility model discloses a vortex effect of vortex piece reinforcing ammonia and flue gas strengthens the mixture of flue gas and ammonia for the regional comparatively even ammonia-cigarette mixed flow field that forms of denitration improves denitration efficiency.
Drawings
FIG. 1 is a schematic view of the denitration ammonia and flue gas mixed-state turbulent flow device.
FIG. 2 is a schematic cross-sectional view of a denitration flue mounting bracket beam.
FIG. 3 is a schematic view of a spoiler.
Wherein: 1. denitration flue 2, ammonia injection grid 3, support crossbeam 4, vortex piece 5, draft tube 6, vortex spiral plate.
Detailed Description
Fig. 1 to 3 are preferred embodiments of the mixed-state turbulent device for denitrified ammonia and flue gas, and the present invention will be further described with reference to fig. 1 to 3.
Referring to fig. 1-2, the denitration ammonia and flue gas mixed-state turbulence device comprises a denitration flue 1, a support cross beam 3 and a turbulence piece 4, wherein an ammonia spraying mechanism is installed in the denitration flue 1, the support cross beam 3 is fixed on the inner side of the denitration flue 1, the support cross beam 3 is located on one side of an outlet of the ammonia spraying mechanism, and the turbulence piece 4 is fixed on the support cross beam 3. The support beam 3 is fixed on the wall surface of the tail part of the denitration flue 1, SO that escaped ammonia and SO in the tail part flue can be better solved3The reaction generates cohesive ammonium sulfate/ammonium bisulfate, which is easy to cause the problems of corrosion and ash deposition blockage of the air preheater and the tail flue. The ammonia injection mechanism in the embodiment is an ammonia injection grating 2, and the bracket beam 3 and the spoiler 4 can be made of an abrasion-resistant material NM 300.
The cross section of denitration flue 1 is the rectangle, and support crossbeam 3 is arranged along denitration flue 1's long limit parallel to reduce support crossbeam 3's quantity, it is more convenient to install. A plurality of support beams 3 are fixed in the denitration flue 1, a spoiler 4 is fixed on each support beam 3, and the spoilers 4 on the adjacent support beams 3 are arranged in a staggered manner. The parallel and interval of a plurality of support crossbeams 3 equals the setting, and 4 intervals of a plurality of vortex pieces on the support crossbeam 3 equal moreover for the flue gas receives the perturbation effect even, in order to guarantee vortex piece 4 plays the best vortex effect.
Referring to fig. 3, the spoiler 4 is a spiral structure, and the axial direction of the spoiler 4 is the same as the flow direction of the flue gas in the denitration flue 1, so as to increase the disturbance of the tail flue gas. Ammonia and flue gas receive spoiler 4's disturbance effect in this region back, obtain more abundant mixture, and the mixed effect is better, further improves denitration efficiency. Specifically to this embodiment, spoiler 4 includes draft tube 5 and vortex spiral plate 6, and vortex spiral plate 6 is fixed in the outside of draft tube 5.
In this embodiment, the lead of the turbulent flow spiral plate 6 is determined according to actual requirements, so that the resistance in the smoke disturbance action process is reduced while the optimal turbulent flow effect is achieved. In addition, the baffle can be arranged on the bracket beam 3 according to the actual production situation on the bracket beam 3 in the embodiment, so that the disturbance of the flow disturbing piece 4 to the flue gas and ammonia is further increased.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a denitration ammonia and flue gas mixed state vortex device which characterized in that: including denitration flue (1), support crossbeam (3) and vortex piece (4), install in denitration flue (1) and spout ammonia mechanism, support crossbeam (3) are fixed in denitration flue (1) inboard, and support crossbeam (3) are located the export one side of spouting ammonia mechanism, and vortex piece (4) are fixed on support crossbeam (3).
2. The denitrated ammonia and flue gas mixed-state flow disturbing device as claimed in claim 1, wherein: the ammonia spraying mechanism is an ammonia spraying grid (2).
3. The denitrated ammonia and flue gas mixed-state flow disturbing device as claimed in claim 1, wherein: denitration flue (1) internal fixation has a plurality of support crossbeams (3), all is fixed with vortex piece (4) on every support crossbeam (3), and vortex piece (4) the staggered arrangement on adjacent support crossbeam (3).
4. The denitrified ammonia and flue gas mixed-state flow disturbing device as claimed in claim 3, wherein: the plurality of support cross beams (3) are arranged in parallel and at equal intervals.
5. The denitrified ammonia and flue gas mixed-state flow disturbing device as claimed in claim 3, wherein: the interval of the plurality of spoilers (4) on the support beam (3) is equal.
6. The denitrated ammonia and flue gas mixed-state flow disturbing device as claimed in claim 1, wherein: the turbulence piece (4) is of a spiral structure, and the axial direction of the turbulence piece (4) is the same as the flow direction of flue gas in the denitration flue (1).
7. The denitrated ammonia and flue gas mixed-state flow disturbing device as claimed in claim 6, wherein: the flow disturbing piece (4) comprises a guide cylinder (5) and a flow disturbing spiral plate (6), and the flow disturbing spiral plate (6) is fixed on the outer side of the guide cylinder (5).
8. The denitrated ammonia and flue gas mixed-state flow disturbing device as claimed in claim 1, wherein: the support beam (3) is fixed at the tail of the denitration flue (1).
9. The denitrated ammonia and flue gas mixed-state flow disturbing device as claimed in claim 1, wherein: the cross section of the denitration flue (1) is rectangular, and the support beam (3) is arranged in parallel along the long edge of the denitration flue (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022225062.6U CN213528132U (en) | 2020-10-09 | 2020-10-09 | Denitration ammonia and flue gas mixed state vortex device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022225062.6U CN213528132U (en) | 2020-10-09 | 2020-10-09 | Denitration ammonia and flue gas mixed state vortex device |
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| Publication Number | Publication Date |
|---|---|
| CN213528132U true CN213528132U (en) | 2021-06-25 |
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| CN202022225062.6U Expired - Fee Related CN213528132U (en) | 2020-10-09 | 2020-10-09 | Denitration ammonia and flue gas mixed state vortex device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984755A (en) * | 2022-08-08 | 2022-09-02 | 河北汉尧环保科技股份有限公司 | Denitration device |
-
2020
- 2020-10-09 CN CN202022225062.6U patent/CN213528132U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984755A (en) * | 2022-08-08 | 2022-09-02 | 河北汉尧环保科技股份有限公司 | Denitration device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210625 |