CN212565834U - Flue flow equalizing device for thermal power plant - Google Patents
Flue flow equalizing device for thermal power plant Download PDFInfo
- Publication number
- CN212565834U CN212565834U CN202021312410.7U CN202021312410U CN212565834U CN 212565834 U CN212565834 U CN 212565834U CN 202021312410 U CN202021312410 U CN 202021312410U CN 212565834 U CN212565834 U CN 212565834U
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- Prior art keywords
- smoke
- flow equalizing
- plate
- flow
- tube
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- 239000000779 smoke Substances 0.000 claims abstract description 65
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003546 flue gas Substances 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 2
- 206010022000 influenza Diseases 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 241000208125 Nicotiana Species 0.000 description 9
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 9
- 239000000243 solution Substances 0.000 description 5
- 238000007514 turning Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to the technical field of flues of thermal power plants, in particular to a flue flow straightener for the thermal power plants, the utility model discloses a guide plate is arranged at the connecting turn of a first smoke tube and a second smoke tube and at the connecting turn of a second smoke tube and a third smoke tube, thereby increasing the fluidity of the smoke output by an economizer in a pipeline and increasing the flow quantity of the smoke; the flue gas passes through the flow equalizing mechanism arranged in the second pipeline, the flow equalizing plate and the second flue are horizontally arranged to guide the flow direction of the flue gas, the flow equalizing support plate is obliquely arranged to facilitate the flow of the flue gas, the flow equalizing plate is uniformly arranged to improve the flow uniformity of the flue gas; the ammonia spraying grid sprays ammonia gas into the third smoke pipe, the ammonia gas and the smoke gas flow into the reactor together, and the ammonia gas and the smoke gas are uniformly mixed through the turbulence mechanism at the upper end of the reactor, so that the reaction degree is improved; the utility model discloses the uneven phenomenon of smoke and dust distribution in catalyst top cross-section has been improved, has alleviated catalyst local wear, has improved denitration efficiency, has reduced ammonia escape rate.
Description
Technical Field
The utility model relates to a flue technical field of thermal power plant, concretely relates to flue flow straightener for thermal power plant.
Background
Thermal power plants generate electricity from the heat energy obtained by burning fuels (coal, petroleum and products thereof, natural gas, etc.). There are two main forms of thermal power generation: the high-temperature and high-pressure steam generated by the boiler is used for driving a steam turbine to rotate to drive a generator to generate electricity, and the generator is called a steam turbine generator unit; the fuel enters the gas turbine to directly convert the heat energy into mechanical energy to drive the generator to generate electricity, and the generator is called a gas turbine generator set. A thermal power plant is generally a power plant mainly including a turbo generator set.
The quantity of nitrogen oxides generated by thermal power plants is one of the main atmospheric pollutants recognized worldwide, and the large discharge of the nitrogen oxides poses a great threat to the whole ecological system and the life health of human beings. The thermal power plant generally adopts a selective catalytic reduction denitration technology to treat discharged nitrogen oxides, and the selective catalytic reduction denitration technology is the most effective and widely applied technology for removing the nitrogen oxides in the flue gas at present.
Structural factors such as asymmetric gradual expansion of an inlet of an SCR reactor of a large power station boiler, flue turning, sudden change of a section at a turning part at the upper part of the reactor and the like are important reasons for causing unevenness of a flue gas flow field and a smoke dust concentration field, further cause local abrasion failure of a catalyst, increase ammonia escape and need further improvement.
SUMMERY OF THE UTILITY MODEL
The above-mentioned shortcoming that exists to prior art, the utility model provides a flue flow straightener for thermal power plant can overcome asymmetric gradual expansion, flue turn, reactor upper portion turning cross-section sudden change isostructure factor that the reactor entry was deposited to prior art effectively and cause the uneven important reason in flue gas flow field and smoke and dust concentration field, and then cause the catalyst local wear to become invalid, increases the problem that ammonia escaped.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a flue flow equalizing device for a thermal power plant comprises an economizer and a reactor; the lower end of the coal economizer is connected with a first smoke tube, the right end of the first smoke tube is connected with a second smoke tube, the upper end of the second smoke tube is connected with a third smoke tube, the right end of the third smoke tube is communicated with the reactor, the right side of the lower end of the reactor is provided with a smoke outlet tube, a flow equalizing mechanism is arranged in the second smoke tube, an ammonia spraying grid is arranged in the third smoke tube, the upper end in the reactor is provided with a turbulence mechanism, and the middle part of the reactor is provided with a catalyst layer;
the flow equalizing mechanism comprises a mounting plate, a flow equalizing plate and a flow equalizing support plate, the mounting plate is fixedly connected to two sides inside the second smoke tube, the flow equalizing plate is uniformly arranged between the mounting plates, the left end and the right end of the flow equalizing plate are fixedly connected with the flow equalizing support plate, the flow equalizing plate is arranged in parallel with the second smoke tube, and the flow equalizing support plate is fixedly connected with the inner side of the mounting plate.
Furthermore, the flow equalizing support plate and the flow equalizing plate are obliquely arranged at an included angle of 30-45 degrees, and the flow equalizing support plate at the right end and the flow equalizing support plate at the left end are opposite in inclination direction.
Furthermore, the turbulence mechanism comprises a grating screen plate and a turbulence tube plate, the grating screen plate is fixedly connected with the reactor, and the turbulence tube plate is arranged at the upper end of the grating screen plate.
Furthermore, the vortex tube sheet includes horizontal vortex tube layer and vertical vortex tube layer, horizontal vortex tube layer upper and lower extreme all is provided with vertical vortex tube layer, horizontal vortex tube layer and vertical vortex tube layer constitute by the vortex tube, be provided with the through-hole of equipartition on the vortex tube.
Furthermore, the connecting corner of the first smoke tube and the second smoke tube and the connecting corner of the second smoke tube and the third smoke tube are both provided with a guide plate.
Furthermore, the guide plate comprises a straight plate and an arc plate, the straight plate is fixedly connected to two ends of the arc plate, and the installation direction of the guide plate is consistent with the flowing direction of the flue gas.
Adopt the utility model provides a technical scheme compares with known public technique, has following beneficial effect:
the utility model is provided with the guide plates at the connecting turn of the first smoke tube and the second smoke tube and at the connecting turn of the second smoke tube and the third smoke tube, thereby increasing the fluidity of the smoke output by the economizer in the pipeline and the flow of the smoke; the flue gas passes through the flow equalizing mechanism arranged in the second pipeline, the flow equalizing plate and the second flue are horizontally arranged to guide the flow direction of the flue gas, the flow equalizing support plate is obliquely arranged to facilitate the flow of the flue gas, the flow equalizing plate is uniformly arranged to improve the flow uniformity of the flue gas; the ammonia spraying grid sprays ammonia gas into the third smoke pipe, the ammonia gas and the smoke gas flow into the reactor together, and the ammonia gas and the smoke gas are uniformly mixed through the turbulence mechanism at the upper end of the reactor, so that the reaction degree is improved; the utility model discloses the uneven phenomenon of smoke and dust distribution in catalyst top cross-section has been improved, has alleviated catalyst local wear, has improved denitration efficiency, has reduced ammonia escape rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural view of the flow equalizing mechanism of the present invention;
FIG. 3 is a schematic axial view of the flow equalizing plate and the flow equalizing support plate of the present invention;
FIG. 4 is a schematic structural view of the turbulent flow mechanism of the present invention;
FIG. 5 is a schematic side view of the turbulent tube of the present invention;
the reference numerals in the drawings denote: 1-economizer, 2-reactor, 3-smoke tube, 4-smoke tube, 5-smoke tube, 6-smoke outlet tube, 7-flow equalizing mechanism, 701-mounting plate, 702-flow equalizing plate, 703-flow equalizing support plate, 8-ammonia injection grid, 9-flow equalizing mechanism, 901-grid screen plate, 902-flow equalizing tube plate, 903-transverse flow equalizing tube layer, 904-vertical flow equalizing tube layer, 905-flow equalizing tube, 906-through hole, 10-catalyst layer, 11-flow guiding plate, 1101-straight plate and 1102-arc plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Referring to fig. 1 to 5, a flue flow equalizing device for a thermal power plant of the present embodiment includes an economizer 1 and a reactor 2; the lower extreme of economizer 1 is connected with a tobacco pipe 3, and 3 right-hand members of a tobacco pipe connect No. two tobacco pipes 4, and No. two 4 upper ends of tobacco pipes are connected with No. three tobacco pipes 5, and No. three 5 right-hand members of tobacco pipe are put through with reactor 2, and is specific, and No. 3 and No. 4 connection turnings of a tobacco pipe and No. 4 and No. 5 connection turnings of tobacco pipe of a tobacco pipe all are provided with guide plate 11. The guide plate 11 comprises a straight plate 1101 and an arc plate 1102, the straight plate 1101 is fixedly connected to two ends of the arc plate 1102, and the installation direction of the guide plate 11 is consistent with the flow direction of the flue gas. The right side of the lower end of the reactor 2 is provided with a smoke outlet pipe 6, the second smoke pipe 4 is internally provided with a flow equalizing mechanism 7, the third smoke pipe 5 is internally provided with an ammonia spraying grid 8, the upper end inside the reactor 2 is provided with a turbulence mechanism 9, and the middle part is provided with a catalyst layer 10.
Specifically, referring to fig. 1 to 3, the flow equalizing mechanism 7 includes a mounting plate 701, a flow equalizing plate 702 and a flow equalizing support plate 703, the mounting plate 701 is fixedly connected to two sides inside the second smoke pipe 4, the flow equalizing plate 702 is uniformly arranged between the mounting plates 701, the flow equalizing plate 703 is fixedly connected to the left end and the right end of the flow equalizing plate 702, the flow equalizing plate 702 is parallel to the second smoke pipe 4, and the flow equalizing support plate 703 is fixedly connected to the inner side of the mounting plate 701. The flow equalizing support plate 703 and the flow equalizing plate 702 are obliquely arranged at an included angle of 30-45 degrees, and the right flow equalizing support plate 703 and the left flow equalizing support plate 703 are oppositely inclined.
Specifically, referring to fig. 1, 4 and 5, the turbulent flow mechanism 9 includes a grid screen 901 and a turbulent flow tube plate 902, the grid screen 901 is fixedly connected to the reactor 2, and the turbulent flow tube plate 902 is disposed at the upper end of the grid screen 901. The turbulent tube plate 902 comprises a transverse turbulent tube layer 903 and a vertical turbulent tube layer 904, wherein the upper end and the lower end of the transverse turbulent tube layer 903 are provided with the vertical turbulent tube layer 904, the transverse turbulent tube layer 903 and the vertical turbulent tube layer 904 are formed by turbulent tubes 905, and through holes 906 which are uniformly distributed are formed in the turbulent tubes 905.
Referring to fig. 1 to 5, when the embodiment is used, flue gas flows from the economizer 1 to the first smoke tube 3, is guided and guided by the guide plate 11, and flows into the second smoke tube 4; the flow equalizing plates 702 and the second flue 4 are horizontally arranged to guide the flow direction of the flue gas, the flow equalizing support plates 703 are obliquely arranged to facilitate the flow of the flue gas, the flow equalizing plates 702 are uniformly arranged to limit the flow position of the flue gas and improve the uniformity of the flow of the flue gas; the flue gas after flow equalization is guided by a guide plate 11 to flow into a third smoke tube 5, and ammonia is sprayed into the third smoke tube 5 by an ammonia spraying grid 8; enabling ammonia gas and flue gas to flow into the reactor 2 together, flowing into the transverse turbulence layer 903 and the vertical turbulence layer 904 from the through holes 906 of the turbulence pipes 905, and then passing through the grid screen 901; the gas with the ammonia gas and the flue gas mixed uniformly flows to the catalyst layer 10 for reaction denitration; after the reaction is finished, the purified flue gas is discharged from the flue gas outlet pipe 6 and enters the next process.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; 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 technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A flue flow equalizing device for a thermal power plant comprises an economizer (1) and a reactor (2); the device is characterized in that the lower end of the economizer (1) is connected with a first smoke tube (3), the right end of the first smoke tube (3) is connected with a second smoke tube (4), the upper end of the second smoke tube (4) is connected with a third smoke tube (5), the right end of the third smoke tube (5) is communicated with the reactor (2), the right side of the lower end of the reactor (2) is provided with a smoke outlet tube (6), the second smoke tube (4) is internally provided with a flow equalizing mechanism (7), the third smoke tube (5) is internally provided with an ammonia injection grid (8), the upper end inside the reactor (2) is provided with a flow disturbing mechanism (9), and the middle part of the reactor is provided with a catalyst layer (10);
the flow equalizing mechanism (7) comprises a mounting plate (701), a flow equalizing plate (702) and a flow equalizing support plate (703), wherein the mounting plate (701) is fixedly connected to two sides inside the second smoke pipe (4), the flow equalizing plate (702) is uniformly arranged between the mounting plate (701), the left end and the right end of the flow equalizing plate (702) are fixedly connected with the flow equalizing support plate (703), the flow equalizing plate (702) and the second smoke pipe (4) are arranged in parallel, and the flow equalizing support plate (703) is fixedly connected with the inner side of the mounting plate (701).
2. The flue flow equalizing device for a thermal power plant according to claim 1, characterized in that the flow equalizing support plate (703) is inclined at an angle of 30 ° to 45 ° with respect to the flow equalizing plate (702), and the flow equalizing support plate (703) at the right end and the flow equalizing support plate (703) at the left end are inclined in opposite directions.
3. The flue flow equalizing device for the thermal power plant as claimed in claim 1, wherein the flow disturbing mechanism (9) comprises a grid screen (901) and a flow disturbing tube plate (902), the grid screen (901) is fixedly connected to the reactor (2), and the flow disturbing tube plate (902) is arranged at the upper end of the grid screen (901).
4. The flue flow equalizing device for thermal power plant of claim 3, characterized in that, vortex tube sheet (902) includes horizontal vortex tube layer (903) and vertical vortex tube layer (904), horizontal vortex tube layer (903) upper and lower extreme all is provided with vertical vortex tube layer (904), horizontal vortex tube layer (903) and vertical vortex tube layer (904) are constituteed by vortex tube (905), be provided with through-hole (906) of equipartition on vortex tube (905).
5. The flue flow equalizing device for the thermal power plant as claimed in claim 1, wherein a flow guide plate (11) is arranged at the connecting corner of the first smoke tube (3) and the second smoke tube (4) and at the connecting corner of the second smoke tube (4) and the third smoke tube (5).
6. The flue flow equalizing device for a thermal power plant according to claim 5, characterized in that the guide plate (11) comprises a straight plate (1101) and an arc plate (1102), the straight plate (1101) is fixedly connected to two ends of the arc plate (1102), and the installation direction of the guide plate (11) is consistent with the flow direction of flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312410.7U CN212565834U (en) | 2020-07-07 | 2020-07-07 | Flue flow equalizing device for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312410.7U CN212565834U (en) | 2020-07-07 | 2020-07-07 | Flue flow equalizing device for thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212565834U true CN212565834U (en) | 2021-02-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021312410.7U Expired - Fee Related CN212565834U (en) | 2020-07-07 | 2020-07-07 | Flue flow equalizing device for thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212565834U (en) |
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2020
- 2020-07-07 CN CN202021312410.7U patent/CN212565834U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210428 Address after: 13 / F and 14 / F, Huaneng Henan building, 40 Zhengguang North Street, Zhengdong New District, Zhengzhou City, Henan Province, 450018 Patentee after: HUAENG INTERNATIONAL POWER Co.,Ltd. HENAN CLEAN ENERGY BRANCH Address before: 450018 Huaneng Henan building, 40 Zhengguang North Street, Zhengdong New District, Zhengzhou City, Henan Province Patentee before: Liu Shaoqiang |
|
| 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: 20210219 Termination date: 20210707 |