CN109395576A - The guiding device of SCR denitration device - Google Patents
The guiding device of SCR denitration device Download PDFInfo
- Publication number
- CN109395576A CN109395576A CN201811073270.XA CN201811073270A CN109395576A CN 109395576 A CN109395576 A CN 109395576A CN 201811073270 A CN201811073270 A CN 201811073270A CN 109395576 A CN109395576 A CN 109395576A
- Authority
- CN
- China
- Prior art keywords
- guide vane
- curved surface
- surface guide
- variable diameter
- diameter curved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 abstract description 17
- 238000009826 distribution Methods 0.000 abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000003134 recirculating effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000002683 foot Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D53/8696—Controlling the catalytic process
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention provides a kind of guiding devices of SCR denitration device.It is the new structure for the distribution of uniform SCR catalyst upstream flow field.Its structure composition includes: guide vane, bracket and reinforcing rib etc..It largely being calculated for the different arrangement of the various type of furnaces, designs a kind of novel guide vane of coal-burning boiler for being generally applicable to arrangement SCR denitration device, this structure is simple to manufacture, and it is easy for installation, securely and reliably.
Description
Technical field
The present invention relates to a kind of guiding devices of SCR denitration device, belong to thermal power generating technology field, are suitable for each grade
Arrange the coal-burning boiler of SCR denitration device, including double reheat power generation sets.
Background technique
Turbo-generator Set experienced more than 100 years development courses as the core technology of thermal power generation.With national ring
The continuous improvement of guaranteed request, new-built unit are provided with SCR denitration device, and the unit that much put into operation also all has carried out denitration and changed
It makes.For SCR denitration device, in order to be uniformly mixed ammonia with flue gas, self-spray ammonia grid is to first floor catalyst must there are foots
Enough distances, this allows for having to one section of SCR inlet flue of design before catalyst, and conventional project is generally by SCR inlet cigarette
Road and SCR reactor separately design as shown in Figure 1, and SCR denitration device by the stokehold backplate and SCR inlet cigarette of SCR reactor
The furnace rear backplate in road is combined into one piece as shown in Fig. 2, this arrangement not only reduces one piece of backplate, and reduces SCR dress
Set integral arrangement space, but this arrangement makes SCR inlet 180 ° of reducing bends occur, downstream Flow Field Distribution
Very uneven, wherein rectification layer entrance is serious to first layer catalyst inlet section streamline deflection, flow field is longitudinally divided along reactor
Cloth is especially uneven, is occurring very big recirculating zone close to reactor front wall position, the local maximum speed of SCR flue system is about
For 15m/s, be unsatisfactory for the requirement of technical indicator, this Flow Field Distribution will can to the structure of catalyst module in downstream area,
Denitration performance causes very big influence.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems of the prior art, and then provide a kind of SCR denitration device
Guiding device, reached the uniform purpose in SCR catalyst top flow field, catalyst made to reach optimal catalytic effect.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of guiding device of SCR denitration device, including the rigid guide vane branch being arranged on SCR inside reactor truss
Frame, and by guide blade carrier be mounted on SCR denitration device gas approach elbow through type variable diameter curved surface directing vane
Piece, non-through type curved surface guide vane, linear type guide vane, described is provided with three through type variable diameter curved surface guide vane
Group, including run through type variable diameter curved surface guide vane a, run through type variable diameter curved surface guide vane b, run through type variable diameter curved surface guide vane
C, run through type variable diameter curved surface guide vane d, wherein described includes being arranged through type variable diameter curved surface guide vane a in bottom,
Left and right both ends are separately positioned on the arranged on left and right sides of gas approach elbow corner point, set through type variable diameter curved surface guide vane b
It sets in the top position for running through type variable diameter curved surface guide vane a, left and right both ends are separately positioned on gas approach elbow corner point
Arranged on left and right sides, and through type variable diameter curved surface guide vane a and between the type variable diameter curved surface guide vane b, gas approach
The right side of elbow corner point, is provided with non-through type curved surface guide vane, and described runs through type variable diameter curved surface guide vane b's
Upper left side is provided with through type variable diameter curved surface guide vane c, and upper right side is provided with through type variable diameter curved surface guide vane d, described
The upper left gas approach elbow through type variable diameter curved surface guide vane c bending angle at be provided with linear type directing vane
Piece a, the upper right corner through type variable diameter curved surface guide vane d are provided with linear type guide vane b.
Described runs through type variable diameter curved surface guide vane, non-through type curved surface guide vane, linear type guide vane both ends
It is provided with abrasionproof reinforced pipe, is provided with reinforcing rib above blade along airflow direction.
The beneficial effects of the present invention are: by using technical solution of the present invention, 1, in gas approach elbow arrange three
Group makes reactor longitudinal direction flue gas entirety rationalization partition through type variable diameter curved surface guide vane；2, one group of non-through type curved surface is arranged to lead
The area distribution for being unevenly distributed local cigarette speed to blade is uniform；3, two groups of linear types are arranged in the region that local eddy currents are concentrated to lead
The phenomenon that blade to eliminate local flow field disorder, it is equal to reach SCR catalyst top flow field to be simutaneously arranged above-mentioned guide vane
Even purpose makes catalyst reach optimal catalytic effect.This structure is simple to manufacture, easy for installation, securely and reliably.
Detailed description of the invention
Fig. 1 is the denitrating system schematic diagram that SCR inlet flue and SCR reactor separately design.
Fig. 2 is SCR denitration device schematic diagram.
Fig. 3 is for SCR denitration device novel flow guide device layout drawing.
Fig. 4 is the SCR system bulk velocity motion pattern for not using technical solution of the present invention.
Fig. 5 is using the SCR system bulk velocity motion pattern after technical solution of the present invention.
Fig. 6 is using VELOCITY DISTRIBUTION cloud atlas at SCR system first floor catalyst upstream 500mm after technical solution of the present invention.
Fig. 7 is guide vane overall structural arrangement figure.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail: the present embodiment is being with technical solution of the present invention
Under the premise of implemented, give detailed embodiment, but protection scope of the present invention is not limited to following embodiments.
As shown in Fig. 3, Fig. 7, a kind of guiding device of SCR denitration device involved in the present embodiment, including be arranged in SCR
Rigid guide blade carrier 4 on inside reactor truss, and SCR denitration device is mounted on by guide blade carrier 4 and is entered
Run through type variable diameter curved surface guide vane 1, non-through type curved surface guide vane 2, linear type guide vane 3 at mouth smoke canal elbow,
Described is provided with three groups through type variable diameter curved surface guide vane 1, including becomes through type variable diameter curved surface guide vane a, through type
Diameter curved surface guide vane b, run through type variable diameter curved surface guide vane c, run through type variable diameter curved surface guide vane d, wherein the packet
It includes and is arranged through type variable diameter curved surface guide vane a in bottom, left and right both ends are separately positioned on gas approach elbow corner point
Arranged on left and right sides, through type variable diameter curved surface guide vane b, the top position through type variable diameter curved surface guide vane a is set,
Left and right both ends are separately positioned on the arranged on left and right sides of gas approach elbow corner point, and are running through type variable diameter curved surface guide vane
A and between the type variable diameter curved surface guide vane b, the right side of gas approach elbow corner point is provided with non-through type curved surface
Guide vane 2, the upper left side through type variable diameter curved surface guide vane b are provided with through type variable diameter curved surface guide vane c,
Upper right side is provided with through type variable diameter curved surface guide vane d, it is described through type variable diameter curved surface guide vane c it is upper left enter
Linear type guide vane a, the right side through type variable diameter curved surface guide vane d are provided at bending angle at mouth smoke canal elbow
Upper angle is provided with linear type guide vane b；Guide vane both ends pass through junction steel plate and support steel plate or reactor backplate welds
It connects.
It is one group through type variable diameter curved surface guide vane a, is one group through type variable diameter curved surface guide vane b, becomes through type
Diameter curved surface guide vane c, through type variable diameter curved surface guide vane it is one group, constitutes three groups and run through type guide vane, can make anti-
Device longitudinal direction flue gas is answered to carry out whole rationalization partition, one group of non-through type curved surface guide vane of design is unevenly distributed local cigarette speed
Area distribution it is uniform；Linear type guide vane is set in the upper left corner of gas approach elbow and the upper right corner, this is at two
It is vortexed the region concentrated, so the phenomenon that two groups of linear type guide vanes of setting are to eliminate local flow field disorder, is simutaneously arranged
Guide vane is stated to reach the uniform purpose in SCR catalyst top flow field, catalyst is made to reach optimal catalytic effect.
Described runs through type variable diameter curved surface guide vane 1, non-through type curved surface guide vane 2,3 liang of linear type guide vane
End is provided with abrasionproof reinforced pipe, to cut down high-temperature flue gas to the erosive wear of guide vane；And along airflow direction above blade
Several reinforcing ribs are set, to promote the overall stiffness of guide vane, guarantee the 1/400 amount of deflection requirement of blade under high loads, and
Eliminate the hidden danger of guide vane vibration.
For the guide vane group end being in contact with SCR reactor, taken root on SCR reactor backplate inner wall,
For other guide vane group ends, rigid support is arranged in SCR reactor in the present invention: rigid support is raw by several connecting tubes
Root is taken root on rigid support on SCR inside reactor main couple, then by various forms of guide vane ends.For convenience of existing
Field installation and adjustment, are connected between guide vane end and reactor backplate inner wall and rigid support using flat steel bar transition, are oriented to
Sealing welding is all made of between blade and connection band steel and reactor backplate inner wall, rigid support and connection band steel.
As shown in figure 5, using technical solution of the present invention, after high-temperature flue gas leaves economizer, passing through under BMCR operating condition
Two 90 degree are redirected into vertical section, after vertical section is mixed with ammonia/air Mixture that spray ammonia grid sprays into, then through two
Section and rectification grid are turned to, denitration reaction occurs into catalyst section, the neat stress after denitration enters the downstreams such as boiler air preheater
Subsidiary engine equipment at different levels；It is compared with the SCR system bulk velocity motion pattern of technical solution of the present invention is not used in Fig. 4, SCR flue system
System bulk velocity is distributed more uniformly along the vertical direction, and without obvious vortex, recirculating zone in computational domain, computational domain entirety fluidised form is steady
Fixed high reynolds number turbulent flow, it is serious to first layer catalyst inlet section streamline deflection especially for original rectification layer entrance
Region, the recirculating zone close to reactor front wall position disappear substantially, and flow field is more uniform along reactor genesis analysis.
As shown in fig. 6, under BMCR operating condition, using technical solution of the present invention, SCR flue system first floor catalyst upstream
VELOCITY DISTRIBUTION cloud atlas at 500mm, as seen from the figure, at the 500mm of catalyst upstream, by the guiding role of guide vane, original design
Preceding wall zone caused by middle elbow disappears substantially, and the distribution of velocity of flue gas scalar is substantially uniform: under BMCR operating condition, on first floor catalyst
Flue cross section flue gas average speed is about 4.9m/s at trip 500mm, and the relative standard deviation of VELOCITY DISTRIBUTION is 7.8%, except apparent
Boundary layer exists outside local low speed, is all satisfied the requirement of void tower flow velocity.
The foregoing is only a preferred embodiment of the present invention, these specific embodiments are all based on the present invention
Different implementations under general idea, and scope of protection of the present invention is not limited thereto, it is any to be familiar with the art
Technical staff in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, should all cover of the invention
Within protection scope.Therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (1)
1. a kind of guiding device of SCR denitration device, including the rigid guide vane branch being arranged on SCR inside reactor truss
Frame (4), and by guide blade carrier (4) be mounted on SCR denitration device gas approach elbow through type variable diameter curved surface
Guide vane (1), non-through type curved surface guide vane (2), linear type guide vane (3), which is characterized in that described runs through type
Variable diameter curved surface guide vane (1) is provided with three groups, including is oriented to through type variable diameter curved surface guide vane a, through type variable diameter curved surface
Blade b, run through type variable diameter curved surface guide vane c, run through type variable diameter curved surface guide vane d, wherein described includes through type change
Diameter curved surface guide vane a is arranged in bottom, and left and right both ends are separately positioned on left and right the two of gas approach elbow corner point
Side is arranged in through type variable diameter curved surface guide vane b through the top position of type variable diameter curved surface guide vane a, left and right both ends point
The arranged on left and right sides of gas approach elbow corner point is not set, and is being become through type variable diameter curved surface guide vane a with through type
Between diameter curved surface guide vane b, the right side of gas approach elbow corner point is provided with non-through type curved surface guide vane (2),
The upper left side through type variable diameter curved surface guide vane b is provided with through type variable diameter curved surface guide vane c, upper right side setting
Have through type variable diameter curved surface guide vane d, the upper left gas approach elbow through type variable diameter curved surface guide vane c
Linear type guide vane a is provided at the bending angle at place, the upper right corner through type variable diameter curved surface guide vane d is provided with
Linear type guide vane b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073270.XA CN109395576B (en) | 2018-09-14 | 2018-09-14 | Flow guiding device of SCR denitration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073270.XA CN109395576B (en) | 2018-09-14 | 2018-09-14 | Flow guiding device of SCR denitration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109395576A true CN109395576A (en) | 2019-03-01 |
| CN109395576B CN109395576B (en) | 2024-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811073270.XA Active CN109395576B (en) | 2018-09-14 | 2018-09-14 | Flow guiding device of SCR denitration device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101766950A (en) * | 2008-12-30 | 2010-07-07 | 上海电气石川岛电站环保工程有限公司 | Flue gas flow equalizing and guiding assembly of selective catalyctic reduction (SCR) denitration reactor inlet |
| CN202146712U (en) * | 2011-06-27 | 2012-02-22 | 南京龙源环保有限公司 | Smoke catalytic reduction denitration device capable of mixing uniformly, equalizing and guiding flow |
| CN202315668U (en) * | 2011-12-01 | 2012-07-11 | 中电投远达环保工程有限公司 | Ammonia injection mixing system for selective catalytic reduction (SCR) denitration device |
| CN102814119A (en) * | 2012-09-11 | 2012-12-12 | 上海龙净环保科技工程有限公司 | Silicon controlled rectifier (SCR) denitration device of waste gas pre-dedusting ammonia spraying disk in power plant |
| CN203108436U (en) * | 2013-03-11 | 2013-08-07 | 中国大唐集团环境技术有限公司 | Flue gas treatment device in power plant |
| 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 |
| CN207371352U (en) * | 2017-06-09 | 2018-05-18 | 中国联合工程有限公司 | SCR denitration ammoniates and even flow field structure |
| CN209348413U (en) * | 2018-09-14 | 2019-09-06 | 哈尔滨锅炉厂有限责任公司 | The guiding device of SCR denitration device |
-
2018
- 2018-09-14 CN CN201811073270.XA patent/CN109395576B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101766950A (en) * | 2008-12-30 | 2010-07-07 | 上海电气石川岛电站环保工程有限公司 | Flue gas flow equalizing and guiding assembly of selective catalyctic reduction (SCR) denitration reactor inlet |
| CN202146712U (en) * | 2011-06-27 | 2012-02-22 | 南京龙源环保有限公司 | Smoke catalytic reduction denitration device capable of mixing uniformly, equalizing and guiding flow |
| CN202315668U (en) * | 2011-12-01 | 2012-07-11 | 中电投远达环保工程有限公司 | Ammonia injection mixing system for selective catalytic reduction (SCR) denitration device |
| CN102814119A (en) * | 2012-09-11 | 2012-12-12 | 上海龙净环保科技工程有限公司 | Silicon controlled rectifier (SCR) denitration device of waste gas pre-dedusting ammonia spraying disk in power plant |
| CN203108436U (en) * | 2013-03-11 | 2013-08-07 | 中国大唐集团环境技术有限公司 | Flue gas treatment device in power plant |
| 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 |
| CN207371352U (en) * | 2017-06-09 | 2018-05-18 | 中国联合工程有限公司 | SCR denitration ammoniates and even flow field structure |
| CN209348413U (en) * | 2018-09-14 | 2019-09-06 | 哈尔滨锅炉厂有限责任公司 | The guiding device of SCR denitration device |
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| Publication number | Publication date |
|---|---|
| CN109395576B (en) | 2024-06-28 |
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