CN203264550U - Diversion apparatus for uniform flow field distribution of Pi type SCR denitrification reactor - Google Patents
Diversion apparatus for uniform flow field distribution of Pi type SCR denitrification reactor Download PDFInfo
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- CN203264550U CN203264550U CN 201220681591 CN201220681591U CN203264550U CN 203264550 U CN203264550 U CN 203264550U CN 201220681591 CN201220681591 CN 201220681591 CN 201220681591 U CN201220681591 U CN 201220681591U CN 203264550 U CN203264550 U CN 203264550U
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Abstract
The utility model provides a diversion apparatus for uniform flow field distribution of a Pi type SCR denitrification reactor. The diversion apparatus comprises a reactor front portion flue channel diversion plate, a reactor inlet diversion plate and a rectifier, wherein the reactor front portion flue channel diversion plate comprises 3 uniformly distributed radian straight plates, the reactor inlet diversion plate comprises 9 non-uniformly distributed radian straight plates, the rectifier is corresponding to catalyst module units, and each module unit is corresponding to four uniformly distributed square rectification grids. According to the utility model, the structure of the diversion apparatus is simple, the diversion problem of flue at the flue channel bending position and above the catalyst is solved, the design of the diversion apparatus inside the selective catalysis reduction denitrification reactor main body is optimized, a flow rate and pressure distribution are uniformized, complete contact of the flue and the catalyst is promoted, and denitrification efficiency is effectively improved.
Description
Affiliated technical field
The utility model relates to the guiding device in the uniform flow field of a kind of π of power plant type selective catalytic reduction Benitration reactor.
Background technology
Along with the development of power industry especially thermal power plant, NO in flue gas
XGradually become one of main sour gas pollutant effulent of thermal power plant.Be used for controlling station boiler NO
XThe technology of discharging can be divided into three major types: use low nitrogen fuel, low NO
XCombustion technology and denitrating flue gas.Current denitration is the most effective, method that technology is the most ripe is burnt exactly, and rear control is denitrating flue gas, and selective-catalytic-reduction denitrified method (SCR) is the gas denitrifying technology that is most widely used at present, its principle is the reducing agent ammonia that sprays in flue gas and spray ammonia system, under 300～400 ℃, with TiO
2V as carrier
2O
5, WO
3And MoO
3React as catalyst Deng metal oxide, become nitrogen and water.The effect of selective catalytic reduction Benitration reactor guiding device is to make flue gas flow rate even, and the flue gas flow by catalyst is distributed rationally, has optimized catalytic reaction, has improved denitrating flue gas efficient and catalyst service life.The present invention is the uniform flow field guiding device of π type SCR Benitration reactor, generally be arranged on the porch of the anterior flue bend of reactor and reactor, comprise the anterior flue deflector (1) of reactor, reactor body top deflector (2) and rectifier (3) in π type SCR reactor.
retrieval to existing document, Yuan Jingqi etc. are at " SCR denitration reactor inlet flue gas flow equalizing and guiding assembly of selective catalyctic reduction " (number of patent application: 200810205061.6), Liu Han is strong to be waited at " the equally distributed device of a kind of aerodynamics and computational methods thereof " (number of patent application: 200810304122.4), though provide the corresponding computational methods of deflector, but not adopting cfdrc further to prove the inside reactor even flow field distributes, best deflector scheme is not proposed, and do not take the deflector setting at the reactor inlet place, the quantitative design of rectifier unit on undeclared reactor inlet place's deflector and catalyst.
The guiding device that the utility model provides on the basis of quantitative design as calculated hydrodynamics software repeatedly verify, draw best guiding device design, can better optimize π type SCR Benitration reactor interior flow field and distribute.
Summary of the invention:
The technical scheme that its technical problem that solves the utility model adopts is: effectively optimize SCR inside reactor flow field by the anterior flue deflector (1) of reactor, reactor inlet place's deflector (2) and rectifier (3), promote the reaction of nitrogen oxides in reducing agent ammonia and flue gas, improve denitration efficiency.
The anterior flue deflector of described reactor (1) generally is arranged on flue bend place, π type reactor front portion, be 3 same deflectors, the design of its deflector (1) be mainly curved pipe in anterior flue 90 ℃ of crooked radians (10) and with arc tangent two ends on add that separately length is the straightway of radius R, finally become Y1, Y2, Y3, its arrangement is for passing through diagonal (8) quartering, Y1, Y2, Y3 are evenly arranged (on 8) online, the corresponding all branches of the mid point of circular arc.
Described reactor top deflector (2) generally is arranged on above π type Benitration reactor body, be 9 same deflectors, the design of its deflector (2) be mainly curved pipe in reactor 90 ℃ of crooked radians (10) and with the tangent perpendicular ends of arc on add that length is the straightway of radius R, finally become X1-X9, its arrangement for by the first decile of diagonal (9) half, X1-X5 is evenly arranged the first half section of (9) online, and the second half section is evenly arranged X6-X9.
Described rectifier (3) generally is arranged in the middle of deflector and ground floor catalyst, and the layout of rectifier is corresponding with the catalyst module unit, four rectifier grid (12) that each modular unit (11) is corresponding uniform.
The present utility model is utilized fluid mechanics principle and is repeatedly put into practice through hydrodynamics software the method that simulation draws, deflector (1) is arranged on flue place, reactor front portion, adopt 3 blocks of straight plates of the radian that is evenly arranged, cushion mixing of reducing agent ammonia and flue gas, made the flow velocity that enters reactor even; Deflector (2) is arranged on above reactor, adopts the straight plate of radian of 9 non-homogeneous layouts, further optimizes the mixing of inside reactor gas, even velocity of flow and pressure distribution, and inside reactor produces without eddy current; Rectifier (3) is arranged on the ground floor catalyst, it arranges corresponding with the catalyst module unit, makes that the gas that enters catalyst reaction is more uniform to be contacted with catalyst surface, reaches abundant reaction, improve denitration efficiency, and then optimize the purpose of inside reactor device design.
Deflector described in the utility model and rectifier unit are simple in structure, and it is convenient to design, can improve π type Benitration reactor denitration efficiency, promote catalyst effectively to utilize, improve catalyst service life.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is deflector of the present utility model and rectifier schematic diagram.
Fig. 2 is Benitration reactor figure.
Fig. 3 is the catalyst in reactor top view.
The anterior flue deflector of 1. reactors in figure, 2. reactor top deflector, 3. rectifier, 4. catalyst layer, 5. the anterior flue of reactor, 6. ammonia-gas spraying device, 7. reactor body, the 8. anterior flue diagonal of reactor, 9. reactor top diagonal, 10. 90 ℃ of bent angle radians of curved flue in reactor, 11. catalyst elements, 12. rectifier grid.
The specific embodiment
The present embodiment is implemented under take technical solution of the present invention as prerequisite, but is not limited to following embodiment.
Deflector shown in Figure 1 (1), deflector (2), rectifier (3) are guiding device of the present invention.The present embodiment adopts the straight plate of radian (Y1, Y2, Y3) the anterior bent angle flue of reactor that evenly distributes, the common composition of straightway that this deflector is the anterior 90 ℃ of bent angle radians of curved flue of reactor with two-end-point is tangent, length is R, the location of the core of radian is on three equal branches of straight line (8); The straight plate of radian (X1-X9) non-uniform Distribution is above reactor, 90 ℃ of crooked radians (10) of curved pipe and adding that with the tangent perpendicular ends of arc length is the straight line of radius R in reactor, its arrangement is that X1-X5 is evenly arranged the first half section of (9) online, second half section is evenly arranged X6-X9, and its center of arc is positioned on corresponding equal branch; The layout of rectifier (3) is corresponding with the catalyst module unit, four rectifier grid (12) that each modular unit (11) is corresponding uniform.
Figure 2 shows that SCR Benitration reactor structure chart, two place's deflector devices are installed at place, UNICOM's reactor body top, the anterior flue of reactor top, above the ground floor catalyst, rectifier unit are installed.Flue gas enters anterior flue (5) and together passes through deflector (Y1-Y3) through flue with the reducing agent ammonia that ammonia-gas spraying device (6) sprays, flue gas enters the deflector (X1-X9) of reactor body (7) top through the gap of deflector and flue, entering rectifier (3) is evenly distributed on after rectification grid (referring to Fig. 3) rectification in each catalyst module unit again, after three layers of catalyst reaction, clean flue gas is discharged.
Result of implementation:
The present embodiment SCR Benitration reactor is of a size of long 13000mm * wide 15000mm * high 14000mm, and in reactor, curved flue radius R is 1200mm, and three layers of catalyst are set in reactor, and catalyst module is of a size of long 1500mm * wide 1500mm * high 1200mm.The long 4740mm of diagonal (8), quadrisection, with 90 ℃ of radiuses circular arc that is R and two-end-point is tangent and length be the straight line of R common form the straight plate of radian place anterior flue place, its center of arc's point is positioned on three equal branches; The long 13800mm of diagonal (9), first half segment length 6900mm is divided into 6 deciles, second half section is divided into 4 deciles, add that with on 90 ℃ of radiuses circular arc that is R tangent lower end vertical with circular arc length is the common straight plate placing response of the radian device top that forms of straight line of radius R, its (X1-X5) center of arc's point is positioned on five equal branches of diagonal (9) first half section, X6 is positioned at diagonal (9) central point, and X7-X9 is positioned on diagonal (9) second half section three equal branches; Single rectifier grid is uniform quartering catalyst module unit, is 750mm * 750mm.
Claims (4)
1. the guiding device in a π type SCR Benitration reactor uniform flow field, comprise the anterior flue deflector (1) of reactor, reactor inlet place deflector (2) and rectifier (3), it is characterized in that: described deflector is two groups of guiding devices, one place is positioned at flue place, reactor front portion, be equally distributed 3 blocks of straight plates of radian, one place is positioned at place, reactor body top, the straight plate of radian for non-uniform Distribution, described rectifier is the again water conservancy diversion of flue gas after two groups of deflectors, be positioned at above the ground floor catalyst, be equally distributed square lattice.
2. the guiding device in the uniform flow field of π type SCR Benitration reactor according to claim 1, it is characterized in that: described deflector (2), be that the straight plate of radian (Y1, Y2, Y3) is evenly distributed on the anterior bent angle flue of reactor, jointly be comprised of the anterior 90 ℃ of bent angle radians of curved flue of reactor and two-end-point is tangent, length is R straight line, the location of the core of radian is on three equal branches of straight line 8;
3. the guiding device in the uniform flow field of π type SCR Benitration reactor according to claim 1, it is characterized in that: described deflector (2), be that the straight plate of radian (X1-X9) non-uniform Distribution is above reactor, by 90 ℃ of crooked radians (10) of curved pipe in reactor and adding that with the tangent perpendicular ends of arc length is the straight line of radius R, its arrangement is that X1-X5 is evenly arranged on five equal branches of the first half section of (9) online, X6 is positioned at diagonal (9) central point, X7-X9 is positioned on diagonal (9) second half section three equal branches,
4. the guiding device in the uniform flow field of π type SCR Benitration reactor according to claim 1, it is characterized in that: the layout of rectifier (3) is corresponding with the catalyst module unit, four square rectifier grid (12) that each modular unit (11) is corresponding uniform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681591 CN203264550U (en) | 2012-12-12 | 2012-12-12 | Diversion apparatus for uniform flow field distribution of Pi type SCR denitrification reactor |
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| CN 201220681591 CN203264550U (en) | 2012-12-12 | 2012-12-12 | Diversion apparatus for uniform flow field distribution of Pi type SCR denitrification reactor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007749A (en) * | 2012-12-12 | 2013-04-03 | 盐城工学院 | Guiding device and guiding method for uniformly distributed flow field of pi type SCR (Selective Catalytic Reduction) denitrification reactor |
| CN104307359A (en) * | 2014-10-24 | 2015-01-28 | 上海交通大学 | Flue gas denitration device for dispersing fly ash particles, and design method of diversion strip of flue gas denitration device |
| CN104607043A (en) * | 2015-01-19 | 2015-05-13 | 大唐科技产业集团有限公司 | Novel flow guide device for preventing catalyst in combined-wall denitrification reactor from abrasion |
| CN106039991A (en) * | 2016-07-07 | 2016-10-26 | 大唐环境产业集团股份有限公司 | Method and apparatus for homogenizing SCR (selective catalytic reduction) denitration system flue flow field |
| CN106765239A (en) * | 2017-01-05 | 2017-05-31 | 东方电气集团东方锅炉股份有限公司 | A kind of boiler back end ductwork with built-in denitration gas bypass |
| CN107824044A (en) * | 2017-12-01 | 2018-03-23 | 山西大学 | A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system |
| WO2021218076A1 (en) * | 2020-04-29 | 2021-11-04 | 华能国际电力股份有限公司 | Novel mixer structure suitable for sncr denitration of high-temperature flue gas from pulverized coal boiler |
-
2012
- 2012-12-12 CN CN 201220681591 patent/CN203264550U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007749A (en) * | 2012-12-12 | 2013-04-03 | 盐城工学院 | Guiding device and guiding method for uniformly distributed flow field of pi type SCR (Selective Catalytic Reduction) denitrification reactor |
| CN104307359A (en) * | 2014-10-24 | 2015-01-28 | 上海交通大学 | Flue gas denitration device for dispersing fly ash particles, and design method of diversion strip of flue gas denitration device |
| CN104307359B (en) * | 2014-10-24 | 2017-09-08 | 上海交通大学 | Equipment for denitrifying flue gas and its flow guide bar design method for disperseing fly ash granule |
| CN104607043A (en) * | 2015-01-19 | 2015-05-13 | 大唐科技产业集团有限公司 | Novel flow guide device for preventing catalyst in combined-wall denitrification reactor from abrasion |
| CN104607043B (en) * | 2015-01-19 | 2017-05-03 | 大唐环境产业集团股份有限公司 | Novel flow guide device for preventing catalyst in combined-wall denitrification reactor from abrasion |
| CN106039991A (en) * | 2016-07-07 | 2016-10-26 | 大唐环境产业集团股份有限公司 | Method and apparatus for homogenizing SCR (selective catalytic reduction) denitration system flue flow field |
| CN106039991B (en) * | 2016-07-07 | 2019-09-03 | 大唐环境产业集团股份有限公司 | A kind of SCR denitration system flue gas duct homogenization method and device |
| CN106765239A (en) * | 2017-01-05 | 2017-05-31 | 东方电气集团东方锅炉股份有限公司 | A kind of boiler back end ductwork with built-in denitration gas bypass |
| CN106765239B (en) * | 2017-01-05 | 2023-05-23 | 东方电气集团东方锅炉股份有限公司 | Boiler tail flue with built-in denitration flue gas bypass |
| CN107824044A (en) * | 2017-12-01 | 2018-03-23 | 山西大学 | A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system |
| CN107824044B (en) * | 2017-12-01 | 2023-09-22 | 山西大学 | Flow field optimizing device of thermal power boiler denitration system |
| WO2021218076A1 (en) * | 2020-04-29 | 2021-11-04 | 华能国际电力股份有限公司 | Novel mixer structure suitable for sncr denitration of high-temperature flue gas from pulverized coal boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20141212 |
|
| EXPY | Termination of patent right or utility model |