CN106984192A - One kind coupling SCR denitration guiding device and structure - Google Patents
One kind coupling SCR denitration guiding device and structure Download PDFInfo
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- CN106984192A CN106984192A CN201710270621.5A CN201710270621A CN106984192A CN 106984192 A CN106984192 A CN 106984192A CN 201710270621 A CN201710270621 A CN 201710270621A CN 106984192 A CN106984192 A CN 106984192A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
Offer one kind coupling SCR denitration guiding device and structure of the present invention, its reasonable in design, simple for production, pressure drop are small, surface will not dust stratification obstruction, integrate rectification and guide functions.The guiding device is in bending cell structure, and it includes deflector and reinforcing plate；Deflector is polylith, and these deflectors are sequentially overlapped extension, and adjacent two pieces of deflectors are fixedly linked by reinforcing plate, and the spacing between adjacent two pieces of deflectors constitutes flow-guiding channel, and the vertical height of these deflectors is incremented by successively.Flue is provided with walling of flue, catalyst layer is arranged in flue；Guiding device is arranged in flue, and the flue corner above catalyst layer, and its deflector is extended by the outside turning superposition in interior turning of flue corner；Deflector is inclined to set relative to walling of flue.
Description
Technical field
The present invention relates to one kind coupling SCR denitration guiding device and structure.
Background technology
Coal-fired flue-gas NOxHarm arrived the degree that can not be ignored, current coal-fired flue gas denitration technology mainly has：
Low nitrogen burning, SCR (SCR), SNCR (SNCR) and coupling denitration (SNCR+SCR) etc..Its
It is middle coupling denitration (SNCR+SCR) technology be not SNCR and SCR simple combination, it be combined with SCR technology efficiently, SNCR skills
The characteristics of art reduced investment and a kind of new technology grown up.
General unit initial stage, can be by NO by low nitrogen burning+SNCR patternxDrop to 100mg/Nm3(butt, standard state, 6%
O2) left and right, with increasingly stricter, " 50355 " minimum discharge standard that particularly some importance area is proposed of discharge standard,
That is SO2、NOx, smoke dust discharge concentration controls in 50mg/Nm respectively3、35mg/Nm3And 5mg/Nm3Hereinafter, SCR denitration technology is coupled
In the engineering for being more and more used in built SNCR, by installing one layer of catalysis additional in boiler back end ductwork suitable temperature point
Agent.As shown in figure 1, catalyst layer is typically located between higher level's economizer and subordinate's economizer.The mistake sprayed into using former SNCR
Reducing agent is measured, the purpose of further denitration is reached.
It is excessive reductant that former SNCR is sprayed into due to what is utilized, by spraying into point from reducing agent in coupling SCR denitration
To being sufficiently mixed for this segment length's flue of catalyst layer entrance, reductant concentration basically reaches uniform distribution.But it is due to coupling
SCR denitration does not have sufficient space to be separately provided flow straightening grid and deflector, and catalyst layer inlet flue gas velocity flow profile is uneven, especially
It is when running into the boiler back end ductwork shown in Fig. 1, therefore a kind of can integrates the coupling SCR denitration of rectification and guide functions
The exploitation of diversion technology is extremely urgent.
The Chinese patent of Application No. 201120051345.1 is disclosed in a kind of SNCR/SCR combined denitrations system
The equal mixing device of flue gas before SCR entrances, it is provided with arc plate guide layer and straight panel guide layer, and flue gas stream passes sequentially through arc plate and led
Fluid layer and straight panel guide layer, it is strong mixed along the length direction formation flow-disturbing and subregion vortex of flue transverse cross-sectional profile, make to come from burner hearth
Reducing agent and nitrogen oxides in SNCR system flue gases are sufficiently mixed, and greatly improve the efficiency of flue back segment SCR denitration.
It is flue gas is mixed that it, which is acted on, does not play rectification and guide functions.
The content of the invention
It is an object of the invention to overcome above shortcomings in the prior art, and provide a kind of reasonable in design,
Simple for production, pressure drop is small, surface will not dust stratification obstruction, integrate the coupling SCR denitration guiding devices of rectification and guide functions
And structure.
The present invention the used technical scheme that solves the above problems is：One kind coupling SCR denitration guiding device, its feature exists
In：The guiding device is in bending cell structure, and it includes deflector and reinforcing plate；Deflector is polylith, and these deflectors are successively
Superposition extension, adjacent two pieces of deflectors are fixedly linked by reinforcing plate, and the spacing between adjacent two pieces of deflectors constitutes water conservancy diversion and led to
Road, and the vertical height of these deflectors is incremented by successively.
Deflector of the present invention is 29 pieces, and vertical height is followed successively by a deflector and led to 20 No. nine from low to high
Flow plate；A number deflector is into No. four deflectors, and vertical height difference is 50mm between every adjacent two pieces of deflectors；No. four water conservancy diversion
Plate is differed with No. five deflector vertical heights as 45mm；No. five deflectors into No. eight deflectors, per adjacent two pieces of deflectors it
Between vertical height difference be 40mm；No. eight deflectors are into No. ten deflectors, vertical height phase between every adjacent two pieces of deflectors
Difference is 35mm；No. ten deflectors are into ten No. four deflectors, and vertical height difference is 30mm between every adjacent two pieces of deflectors；Ten
No. four deflectors are into ten No. six deflectors, and vertical height difference is 25mm between every adjacent two pieces of deflectors；Ten No. six water conservancy diversion
Plate is into ten No. nine deflectors, and vertical height difference is 20mm between every adjacent two pieces of deflectors；Ten No. nine deflectors are to 20
In a number deflector, vertical height difference is 15mm between every adjacent two pieces of deflectors；Two ride on Bus No. 11 deflectors are to 20 No. nine
In deflector, vertical height difference is 10mm between every adjacent two pieces of deflectors.
Deflector of the present invention is strip, and width is 200mm, and thickness is 6mm, and material is Q345.
Reinforcing plate of the present invention is block structure, and thickness is 6mm, and material is Q345, is arranged in adjacent two pieces of water conservancy diversion
Between plate.
Flue is provided with one kind coupling SCR denitration flow-guiding structure, including catalyst layer and walling of flue, walling of flue, is catalyzed
Oxidant layer is arranged in flue；It is characterized in that：Also include guiding device；Guiding device is arranged in flue, and positioned at catalyst
Flue corner above layer, its deflector is extended by the outside turning superposition in interior turning of flue corner；Deflector relative to
Walling of flue is inclined to set.
The angle of deflector and walling of flue of the present invention is 5 °.
Invention compared with prior art, with advantages below and effect：(1) what raw material need not be specially
Bending, which just can be welded directly, to be used；(2) by the micro adjustment to angle between deflector and vertical height just reach rectification and
The effect of water conservancy diversion；(3) unitary construction of guiding device, fulcrum, is only welded on walling of flue, nothing by length direction two ends each other
Need excessive support；(4) pressure drop that guiding device is produced to whole denitrating system is small, and flow field is smooth；(5) not dust stratification, does not hinder
Plug, has abrasionproof effect to the flue gas of high dust-laden；(6) be conducive to extending the mechanically and chemically life-span of catalyst, lift denitrating system
Overall availability.
Brief description of the drawings
Fig. 1 couples arrow in the structural representation of SCR denitration flow-guiding structure, figure for the embodiment of the present invention and show flue gas stream
To direction.
Fig. 2 is this Fig. 1 partial structural diagram, and arrow show flue gas flow direction direction in figure.
Fig. 3 is the structural representation of guiding device of the embodiment of the present invention.
Fig. 4 is the speed overall distribution figure for installing guiding device rear catalyst layer gas approach additional.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, following examples are to this hair
Bright explanation and the invention is not limited in following examples.
Referring to Fig. 1~Fig. 3, the guiding device 32 of the present embodiment is in bending cell structure, and it includes deflector and reinforcing plate
30。
Deflector is polylith, and these deflectors are sequentially overlapped extension, and adjacent two pieces of deflectors pass through the stationary phase of reinforcing plate 30
Even, the spacing between adjacent two pieces of deflectors constitutes flow-guiding channel.The vertical height of these deflectors is incremented by successively, overall in first
Gentle curvilinear trend after rising, when such flue gas flows to turn in flue corner, by low layer to high level by every piece of deflector
The part water conservancy diversion for being higher by front deflector enters flow-guiding channel, has reached rectification and the effect of water conservancy diversion.
In the present embodiment, deflector is 29 pieces, and vertical height is followed successively by a deflector 1 to 29 and led from low to high
Flow plate 29.In 1 to No. four deflector of a number deflector 4, vertical height difference is 50mm between every adjacent two pieces of deflectors；No. four
Deflector 4 is differed with No. five vertical heights of deflector 5 as 45mm；In 5 to No. eight deflectors of No. five deflectors 8, per adjacent two pieces
Vertical height difference is 40mm between deflector；In 8 to No. ten deflectors of No. eight deflectors 10, between every adjacent two pieces of deflectors
Vertical height difference is 35mm；It is vertical high between every adjacent two pieces of deflectors in 10 to ten No. four deflectors 14 of No. ten deflectors
Degree difference is 30mm；In ten No. four deflectors, 14 to ten No. six deflectors 16, vertical height phase between every adjacent two pieces of deflectors
Difference is 25mm；In ten No. six deflectors, 16 to ten No. nine deflectors 19, vertical height difference is between every adjacent two pieces of deflectors
20mm；In ten No. nine ride on Bus No. 11 of deflector 19 to two deflectors 21, vertical height difference is between every adjacent two pieces of deflectors
15mm；In two deflectors 29 of ride on Bus No. 11 deflector 21 to 29, vertical height difference is between every adjacent two pieces of deflectors
10mm。
Deflector is strip, and length is determined by flue length, width 200mm, thickness 6mm, material Q345.
Reinforcing plate 30 is block structure, and thickness 6mm, material Q345 are arranged between adjacent two pieces of deflectors.
The coupling SCR denitration flow-guiding structure of the present embodiment include higher level's economizer 31, guiding device 32, catalyst layer 33,
Subordinate's economizer 34 and walling of flue 35.
Flue is provided with walling of flue 35.
Higher level's economizer 31, catalyst layer 33, subordinate's economizer 34 are successively set in flue along flue gas flow direction.
Guiding device 32 is arranged in flue, and the two ends of its length direction are directly weldingly fixed on walling of flue 35, are reached whole
The effect that body is fixed.Deflector is inclined to set relative to walling of flue 35, and the angle of deflector and walling of flue 35 is 5 °.
Guiding device 32 is located at the flue corner of the top of catalyst layer 33, its deflector by flue corner interior turning
Outside turning superposition extension, can thus cover flue corner.Flue gas is flowed in flue corner and turned round.
Flue gas from higher level's economizer 31 and under, during by the guiding device 32 of flue corner, flue gas flow rate is adjusted,
The flue gas that flow-guiding channel comes out gently uniformly flows through the surface of catalyst layer 33 again, optimal denitration performance is realized, under
Level economizer 34 flows out.
As shown in figure 4, installing additional after guiding device 32, the surface flue gas mean flow rate of catalyst layer 33 is 5.1m/s, flow velocity phase
To deviation 12.1%, while design requirement is met, the possibility that uneven flue gas impacts to catalyst layer 33 is reduced, is extended
Mechanically and chemically life-span of catalyst.
Above content described in this specification is only to structure example explanation of the present invention；Moreover, this hair
The title that bright each several part is taken can also be different, what all construction, feature and principles according to described in inventional idea of the present invention were done etc.
In effect or simple change, the protection domain for being included in patent of the present invention.
Claims (6)
1. one kind coupling SCR denitration guiding device, it is characterised in that：The guiding device is in bending cell structure, and it includes water conservancy diversion
Plate and reinforcing plate；Deflector is polylith, and these deflectors are sequentially overlapped extension, and adjacent two pieces of deflectors pass through reinforcing plate stationary phase
Even, the spacing between adjacent two pieces of deflectors constitutes flow-guiding channel, and the vertical height of these deflectors is incremented by successively.
2. coupling SCR denitration guiding device according to claim 1, it is characterised in that：Described deflector is 29 pieces, is hung down
Straight height is followed successively by a deflector to 20 No. nine deflectors from low to high；A number deflector is into No. four deflectors, per phase
Vertical height difference is 50mm between adjacent two pieces of deflectors；No. four deflectors are differed with No. five deflector vertical heights as 45mm；
No. five deflectors are into No. eight deflectors, and vertical height difference is 40mm between every adjacent two pieces of deflectors；No. eight deflectors are extremely
In No. ten deflectors, vertical height difference is 35mm between every adjacent two pieces of deflectors；No. ten deflectors are to ten No. four deflectors
In, vertical height difference is 30mm between every adjacent two pieces of deflectors；Ten No. four deflectors are into ten No. six deflectors, per adjacent
Vertical height difference is 25mm between two pieces of deflectors；Ten No. six deflectors are into ten No. nine deflectors, per adjacent two pieces of water conservancy diversion
Vertical height difference is 20mm between plate；Ten No. nine deflectors are into two ride on Bus No. 11 deflectors, between every adjacent two pieces of deflectors
Vertical height difference is 15mm；Two ride on Bus No. 11 deflectors are vertical between every adjacent two pieces of deflectors into 20 No. nine deflectors
Highly difference is 10mm.
3. coupling SCR denitration guiding device according to claim 1, it is characterised in that：Described deflector is strip,
Width is 200mm, and thickness is 6mm, and material is Q345.
4. coupling SCR denitration guiding device according to claim 1, it is characterised in that：Described reinforcing plate is tied to be block
Structure, thickness is 6mm, and material is Q345, is arranged between adjacent two pieces of deflectors.
5. it is provided with flue, catalyst in one kind coupling SCR denitration flow-guiding structure, including catalyst layer and walling of flue, walling of flue
Layer is arranged in flue；It is characterized in that：Also include the guiding device described in Claims 1 to 4 any claim；Water conservancy diversion is filled
Put and be arranged in flue, and the flue corner above the catalyst layer, its deflector from flue corner interior turning to
Outer turning superposition extension；Deflector is inclined to set relative to walling of flue.
6. coupling SCR denitration flow-guiding structure according to claim 5, it is characterised in that：Described deflector and walling of flue
Angle be 5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710270621.5A CN106984192B (en) | 2017-04-24 | 2017-04-24 | Coupling SCR denitration guiding device and structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710270621.5A CN106984192B (en) | 2017-04-24 | 2017-04-24 | Coupling SCR denitration guiding device and structure |
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| Publication Number | Publication Date |
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| CN106984192A true CN106984192A (en) | 2017-07-28 |
| CN106984192B CN106984192B (en) | 2022-11-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126499A (en) * | 2018-01-02 | 2018-06-08 | 李卫军 | A kind of desulfation dust-extraction device based on rotating spraying and spiral gas-liquid separation principle |
| CN108704477A (en) * | 2018-07-09 | 2018-10-26 | 刘盈 | A kind of energy saving and environment friendly equipment for denitrifying flue gas and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057770A (en) * | 1996-08-26 | 1998-03-03 | Babcock Hitachi Kk | Flue gas denitrification device |
| CN101306325A (en) * | 2008-07-07 | 2008-11-19 | 北京博奇电力科技有限公司 | Flue gas even distribution device of selective catalytic reduction reaction denitration reactor |
| 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 |
| CN103736394A (en) * | 2014-01-02 | 2014-04-23 | 上海交通大学 | Design method of guide plate of reducing flue of SCR (selective catalytic reduction) de-nitration device |
| CN206762661U (en) * | 2017-04-24 | 2017-12-19 | 中国联合工程公司 | Couple SCR denitration guiding device and structure |
-
2017
- 2017-04-24 CN CN201710270621.5A patent/CN106984192B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057770A (en) * | 1996-08-26 | 1998-03-03 | Babcock Hitachi Kk | Flue gas denitrification device |
| CN101306325A (en) * | 2008-07-07 | 2008-11-19 | 北京博奇电力科技有限公司 | Flue gas even distribution device of selective catalytic reduction reaction denitration reactor |
| 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 |
| CN103736394A (en) * | 2014-01-02 | 2014-04-23 | 上海交通大学 | Design method of guide plate of reducing flue of SCR (selective catalytic reduction) de-nitration device |
| CN206762661U (en) * | 2017-04-24 | 2017-12-19 | 中国联合工程公司 | Couple SCR denitration guiding device and structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126499A (en) * | 2018-01-02 | 2018-06-08 | 李卫军 | A kind of desulfation dust-extraction device based on rotating spraying and spiral gas-liquid separation principle |
| CN108704477A (en) * | 2018-07-09 | 2018-10-26 | 刘盈 | A kind of energy saving and environment friendly equipment for denitrifying flue gas and method |
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|---|---|
| CN106984192B (en) | 2022-11-25 |
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Address after: The city of Hangzhou city of Zhejiang Province, 310022 Stonebridge Road No. 338 Applicant after: CHINA UNITED ENGINEERING Corp.,Ltd. Address before: The city of Hangzhou city of Zhejiang Province, 310022 Stonebridge Road No. 338 Applicant before: CHINA UNITED ENGINEERING Corp. |
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