CN208244456U - A kind of guiding device - Google Patents
A kind of guiding device Download PDFInfo
- Publication number
- CN208244456U CN208244456U CN201820103530.2U CN201820103530U CN208244456U CN 208244456 U CN208244456 U CN 208244456U CN 201820103530 U CN201820103530 U CN 201820103530U CN 208244456 U CN208244456 U CN 208244456U
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- flow deflector
- straight tube
- flue
- guiding device
- straight
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Abstract
A kind of guiding device, for being arranged in elbow flue interconnected and straight tube diffusion flue, guiding device includes arc flow deflector and straight tube diffuser flow deflector, and arc flow deflector is set in elbow flue, and straight tube diffuser flow deflector is set in straight tube diffusion flue.By the rectification twice of arc flow deflector and straight tube diffuser flow deflector, the uniformity of reactor inlet ammonia density distribution can be greatly improved, improves denitration reaction efficiency, reduces the escaping of ammonia rate, reduces device operating cost, improves device operational safety.
Description
Technical field
The utility model relates to cigarette air duct diversion technology fields, and in particular to for selective catalytic reduction (SCR,
Selective Catalytic Reduction) reactor guiding device.
Background technique
In recent years, with the promotion of environmental protection requirement, smoke emissioning pollution object norm controlling is more harsh, especially cigarette
NO in gasxDischarge amount is strictly controlled, and to gas denitrifying technology, more stringent requirements are proposed.SCR denitration technology is de- at present
The denitration technology that nitre efficiency is higher, technology is more mature is widely used in industrial flue gas cleaning processing.SCR denitration technology
Properties Control index is mainly denitration efficiency and the escaping of ammonia rate, to guarantee that SCR reactor reaches denitration efficiency and the reduction of design
Amount of ammonia slip has strict demand to inlet flue gas velocity distribution uniformity and denitrfying agent ammonia mixture homogeneity.
To guarantee that velocity of flue gas is uniformly distributed in reactor inlet flue, need to be arranged in flue reasonable water conservancy diversion dress
It sets, rectifies flow of flue gas.For SCR denitration device, due to space layout requirement, into SCR reactor flue generally by more
A elbow and straight pipe form, and the setting of guiding device concentrates on elbow at present.Such as Chinese utility model patent
CN201620922645.5 discloses a kind of SCR denitration flue gas flow guiding device set on flue turning, by setting in elbow
Muti-piece deflector is set to by having certain rectified action at the flue gas of elbow.But only in elbow, setting guiding device is difficult to
SCR reactor inlet is set to reach ideal velocity flow profile, in straight pipe there are still the non-uniform problem in flow field, straight pipe flue gas is also
Further water conservancy diversion is needed, flue gas even distribution is guided.
Utility model content
The purpose of the utility model is to provide a kind of guiding devices, can spread to reactor inlet elbow and straight tube
Section flue gas carries out coupling rectification, improves flue gas flow field uniformity.
The utility model uses following solution:
A kind of guiding device, the guiding device spread flue in elbow flue interconnected and straight tube for being arranged
Interior, the guiding device includes arc flow deflector and straight tube diffuser flow deflector, and the arc flow deflector is set to the elbow
In flue, the straight tube diffuser flow deflector is set in the straight tube diffusion flue.
Preferably, the arc flow deflector is multiple, and each arc flow deflector is arranged equally spaced at the elbow flue
It is interior.
Preferably, the quantity of the arc flow deflector is 1-6.
Preferably, the arc flow deflector includes sequentially connected entrance straight section, 90 DEG C of segmental arcs and exports straight section, described
The length of entrance straight section and outlet straight section is 50-1000mm.
Preferably, the arc flow deflector is arranged along the flow of flue gas direction in the elbow flue.
Preferably, the cross section of the straight tube diffusion flue is trapezoidal, and the straight tube diffuser flow deflector is multiple, and each
Straight tube diffuser flow deflector is set in qually spaced in the straight tube diffusion flue, in the arrival end of straight tube diffusion flue, phase
The distance between adjacent straight tube diffuser flow deflector is a, in the outlet end of straight tube diffusion flue, adjacent straight tube diffuser water conservancy diversion
The distance between piece is b, and the distance b is greater than the distance a.
Preferably, the quantity of the straight tube diffuser flow deflector is 1-6.
Preferably, the cross section of the straight tube diffuser flow deflector is broken line, and the broken line includes sequentially connected entrance
The length of straight section, intermediate straight section and outlet straight section, the entrance straight section and outlet straight section is 50-1000mm.
Preferably, the arc flow deflector includes sequentially connected entrance straight section, 90 DEG C of segmental arcs and exports straight section, described
The cross section of straight tube diffuser flow deflector is broken line, and the broken line includes sequentially connected entrance straight section, intermediate straight section and outlet
Straight section, and the outlet straight section of the arc flow deflector is parallel with the entrance straight section of the broken line.
Preferably, spray ammonia nozzle is equipped in the elbow flue, the spray ammonia nozzle is set under the arc flow deflector
Trip.
The utility model has the beneficial effects that: the arc flow deflector being arranged in elbow flue flue gas can be turned to from
Flue gas bias current caused by mental power function carries out correction and flows, and guarantees the initial uniform for entering flue gas in straight tube diffusion flue
Property, the straight tube diffuser flow deflector being arranged in straight tube diffusion flue realizes the rectification again to flue gas, further improves cigarette
The uniformity of gas distribution can greatly improve reactor by the rectification twice of arc flow deflector and straight tube diffuser flow deflector
The uniformity of entrance ammonia density distribution, improves denitration reaction efficiency, reduces the escaping of ammonia rate, reduces device operating cost, improves dress
Set operational safety.
Detailed description of the invention
The utility model illustrative embodiments are described in more detail in conjunction with the accompanying drawings, the utility model it is upper
It states and other purposes, feature and advantage will be apparent.Wherein, in the utility model illustrative embodiments, phase
Same appended drawing reference typically represents same parts.
Fig. 1 is the structural schematic diagram of the guiding device of exemplary embodiment according to the present utility model；
Fig. 2 is the velocity of flue gas cloud atlas of the guiding device of exemplary embodiment according to the present utility model；
Fig. 3 is only in the velocity of flue gas cloud atlas of the elbow of SCR reactor inlet flue setting guiding device；
Fig. 4 is to be not provided with the velocity of flue gas cloud atlas of guiding device in SCR reactor inlet flue.
Description of symbols:
1- elbow flue, 2- arc flow deflector, 3- spray ammonia nozzle, 4- straight tube diffuser flow deflector, and 5- straight tube spreads flue,
6- grid, 7-SCR reactor, 8- denitrating catalyst bed.
Specific embodiment
The embodiments of the present invention is more fully described below with reference to accompanying drawings.Although being shown in attached drawing practical
Two kinds of novel illustrative embodiments, however, it is to be appreciated that the utility model can be realized in a variety of manners, without should be by here
The embodiment of elaboration is limited.On the contrary, these embodiments are provided so that the utility model is more thorough and complete, and
And the scope of the utility model can be completely communicated to those skilled in the art.
The guiding device of exemplary embodiment according to the present utility model is mutual at SCR reactor inlet for being arranged in
In elbow flue and straight tube the diffusion flue of connection, which includes arc flow deflector and straight tube diffuser flow deflector, arc
Shape flow deflector is set in elbow flue, and straight tube diffuser flow deflector is set in straight tube diffusion flue.
The arc flow deflector being arranged in elbow flue can turn to flue gas bias current caused by centrifugal force effect to flue gas
It carries out correction and flows, guarantee the initial uniform for entering flue gas in straight tube diffusion flue, be arranged in straight tube diffusion flue
Straight tube diffuser flow deflector realizes the rectification again to flue gas, further improves the uniformity of smoke distribution, substantially increases
The uniformity of reactor inlet ammonia density distribution, improves denitration reaction efficiency, reduces the escaping of ammonia rate, reduces device operation
Cost improves device operational safety.
In one example, arc flow deflector is multiple, and each arc flow deflector is arranged equally spaced in elbow flue.
Preferably, the quantity of arc flow deflector is 1-6, it is further preferable that the quantity of arc flow deflector is 2.
In one example, arc flow deflector includes sequentially connected entrance straight section, 90 DEG C of segmental arcs and outlet straight section, is entered
The length of mouth straight section and outlet straight section is 50-1000mm.
In one example, arc flow deflector is arranged along the flow of flue gas direction in elbow flue, so that arc water conservancy diversion
Piece matches with flow of flue gas, is conducive to effectively carry out correction to flue gas bias current and flow.
In one example, the cross section of straight tube diffusion flue is trapezoidal, and straight tube diffuser flow deflector is multiple, and each straight
Pipe diffuser flow deflector is set in qually spaced in straight tube diffusion flue, in the arrival end of straight tube diffusion flue, adjacent straight tube diffusion
The distance between section flow deflector is a, and in the outlet end of straight tube diffusion flue, the distance between adjacent straight tube diffuser flow deflector is
B, and distance b is greater than distance a.This setup is conducive to effectively carry out the flue gas in straight tube diffusion flue whole again
Stream, facilitates flue gas and is uniformly distributed.
In one example, the quantity of straight tube diffuser flow deflector is 1-6, it is preferable that straight tube diffuser flow deflector
Quantity is 4.
In one example, the cross section of straight tube diffuser flow deflector is broken line, which includes sequentially connected entrance
The length of straight section, intermediate straight section and outlet straight section, entrance straight section and outlet straight section is 50-1000mm, and arc flow deflector goes out
Mouth straight section is parallel with the entrance straight section of broken line.The outlet straight section of arc flow deflector is parallel with the entrance straight section of broken line to be conducive to effectively
Ground rectifies the flue gas in straight tube diffusion flue again.
In one example, spray ammonia nozzle is equipped in elbow flue, spray ammonia nozzle is set to the downstream of arc flow deflector.Pass through
The ammonia that the flue gas of arc flow deflector sprays after the initial water conservancy diversion of arc flow deflector with spray ammonia nozzle mixes, subsequently into straight
Pipe spreads flue, is rectified again by straight tube diffuser flow deflector.
Embodiment
Fig. 1 is the structural schematic diagram of the guiding device of exemplary embodiment according to the present utility model, as shown in Figure 1, root
It is used to be arranged in the elbow flue 1 and straight tube interconnected of 7 inlet of SCR reactor according to the guiding device of exemplary embodiment
It spreads in flue 5, wherein the cross section that straight tube spreads flue 5 is trapezoidal.The guiding device includes arc flow deflector 2 and straight tube
Diffuser flow deflector 4, arc flow deflector 2 are set in elbow flue 1, and straight tube diffuser flow deflector 4 is set to straight tube diffusion cigarette
In road 5.In Fig. 1, arrow indicates flow of flue gas direction.
Arc flow deflector 2 is 2, and every arc flow deflector 2 includes sequentially connected entrance straight section, 90 DEG C of segmental arcs and goes out
The length L1 of mouth straight section, entrance straight section and outlet straight section is 200mm.Straight tube diffuser flow deflector 4 is 4, and straight tube diffuser is led
The cross section of flow 4 is broken line, which includes sequentially connected entrance straight section, intermediate straight section and outlet straight section, entrance straight section
Length L2 with outlet straight section is 200mm.4 straight tube diffuser flow deflectors 4 are arranged equally spaced in straight tube diffusion flue 5,
In the arrival end of straight tube diffusion flue 5, the distance between adjacent straight tube diffuser flow deflector 4 a is 180mm, spreads cigarette in straight tube
The outlet end in road 5, the distance between adjacent straight tube diffuser flow deflector 4 b are 260mm.And in the entrance of straight tube diffusion flue 5
It holds, is also 180mm at a distance from the straight tube diffuser flow deflector 4 and inner wall nearest with the inner wall of straight tube diffusion flue 5, expands in straight tube
The outlet end for dissipating flue 5, the straight tube diffuser flow deflector 4 nearest with the inner wall of straight tube diffusion flue 5 are also at a distance from inner wall
260mm。
Spray ammonia nozzle 3 is equipped in elbow flue 1, spray ammonia nozzle 3 is set to the downstream of arc flow deflector 2, i.e. flow of flue gas side
To downstream.
When guiding device accoding to exemplary embodiment works, flue gas enters elbow cigarette from heating furnace convection cell exhaust pass
Road 1 carries out initial water conservancy diversion through arc flow deflector, and then flue gas is mixed with the ammonia that spray ammonia nozzle 3 sprays, and goes successively to straight tube expansion
It dissipates flue 5 further to be rectified, the grid 6 of the reacted device entrance of cocurrent, into SCR reactor 7, in denitrating catalyst bed
8 carry out denitration reaction through catalyst action, denitrfying agent ammonia and flue gas, and the flue gas outflow reactor after denitration enters more than heating furnace
Heat recovery system.
The arc flow deflector being arranged in elbow flue can turn to flue gas bias current caused by centrifugal force effect to flue gas
It carries out correction for the first time and flows, the straight tube diffuser flow deflector being arranged in straight tube diffusion flue is realized to the secondary whole of flue gas
Stream, further improves the uniformity of smoke distribution.
In order to verify exemplary embodiment according to the present utility model guiding device rectification effect, using CFD
(Computational Fluid Dynamics) method has carried out numerical simulation.Fig. 2 is according to the present utility model exemplary
The velocity of flue gas cloud atlas of the guiding device of embodiment, Fig. 3 are that guiding device only is arranged in the elbow of SCR reactor inlet flue
Velocity of flue gas cloud atlas, Fig. 4 is to be not provided with the velocity of flue gas cloud atlas of guiding device in SCR reactor inlet flue.
Compare the water conservancy diversion that speed cloud atlas shown by Fig. 2-4 can be seen that exemplary embodiment according to the present utility model
Device makes SCR reactor inlet obtain most uniform VELOCITY DISTRIBUTION, and only in elbow, setting guiding device can improve due to curved
Velocity flow profile caused by head turns to is uneven, but there is also certain flue gas bias currents for SCR reactor inlet；If in SCR reactor
Gas approach is not provided with guiding device, and flue gas is obvious in elbow Biased flow phenomenon, in downstream SCR reactor inlet flue gas flow rate point
Cloth is uneven, it is difficult to meet requirement of the SCR reactor to flue gas flow rate distributing homogeneity.
The embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is also not necessarily limited to disclosed each embodiment.Without departing from the scope and spirit of embodiment described, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle and practical application for best explaining embodiment, or other those of ordinary skill of the art is enable to understand this
The embodiment that text discloses.
Claims (10)
1. a kind of guiding device, which is characterized in that the guiding device is for being arranged in elbow flue interconnected and straight tube
It spreads in flue, the guiding device includes arc flow deflector and straight tube diffuser flow deflector, and the arc flow deflector is set to
In the elbow flue, the straight tube diffuser flow deflector is set in the straight tube diffusion flue.
2. guiding device according to claim 1, which is characterized in that the arc flow deflector is multiple, and each arc is led
Flow is arranged equally spaced in the elbow flue.
3. guiding device according to claim 1, which is characterized in that the quantity of the arc flow deflector is 1-6.
4. guiding device according to claim 1, which is characterized in that the arc flow deflector includes sequentially connected entrance
The length of straight section, 90 DEG C of segmental arcs and outlet straight section, the entrance straight section and outlet straight section is 50-1000mm.
5. guiding device according to claim 1, which is characterized in that the arc flow deflector is along in the elbow flue
Flow of flue gas direction setting.
6. guiding device according to claim 1, which is characterized in that the cross section of straight tube diffusion flue be it is trapezoidal,
The straight tube diffuser flow deflector is multiple, and each straight tube diffuser flow deflector is set in qually spaced in the straight tube diffusion flue
Interior, in the arrival end of straight tube diffusion flue, the distance between adjacent straight tube diffuser flow deflector is a, is expanded in the straight tube
The outlet end of flue is dissipated, the distance between adjacent straight tube diffuser flow deflector is b, and the distance b is greater than the distance a.
7. guiding device according to claim 1, which is characterized in that the quantity of the straight tube diffuser flow deflector is 1-6
It is a.
8. guiding device according to claim 1, which is characterized in that the cross section of the straight tube diffuser flow deflector is folding
Line, the broken line include sequentially connected entrance straight section, intermediate straight section and export straight section, the entrance straight section and outlet straight section
Length is 50-1000mm.
9. guiding device according to claim 1, which is characterized in that the arc flow deflector includes sequentially connected entrance
Straight section, 90 DEG C of segmental arcs and outlet straight section, the cross section of the straight tube diffuser flow deflector are broken line, and the broken line includes successively
The entrance straight section of connection, intermediate straight section and outlet straight section, and the entrance of the outlet straight section and the broken line of the arc flow deflector
Straight section is parallel.
10. guiding device according to claim 1, which is characterized in that spray ammonia nozzle is equipped in the elbow flue, it is described
Spray the downstream that ammonia nozzle is set to the arc flow deflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820103530.2U CN208244456U (en) | 2018-01-22 | 2018-01-22 | A kind of guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820103530.2U CN208244456U (en) | 2018-01-22 | 2018-01-22 | A kind of guiding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208244456U true CN208244456U (en) | 2018-12-18 |
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ID=64620453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820103530.2U Active CN208244456U (en) | 2018-01-22 | 2018-01-22 | A kind of guiding device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812411A (en) * | 2019-01-28 | 2019-05-28 | 中国石油天然气集团公司 | A kind of blackage clearing flow dredging apparatus and its assemble method for oil transportation Pump Suction Nozzle |
| CN109847501A (en) * | 2019-03-12 | 2019-06-07 | 中国一冶集团有限公司 | A kind of enclosure wall dust pelletizing system of construction site |
| CN109884241A (en) * | 2019-03-05 | 2019-06-14 | 华电电力科学研究院有限公司 | A kind of SCR denitration simulation reaction device and analogy method |
| CN110215831A (en) * | 2019-03-14 | 2019-09-10 | 河北工程大学 | The device for homogenizing the denitration flow field section Pen An flue gas flow rate |
| CN110487695A (en) * | 2019-07-08 | 2019-11-22 | 佛山市顺德区阿波罗环保器材有限公司 | Strainability detection system of fume filtering element |
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2018
- 2018-01-22 CN CN201820103530.2U patent/CN208244456U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812411A (en) * | 2019-01-28 | 2019-05-28 | 中国石油天然气集团公司 | A kind of blackage clearing flow dredging apparatus and its assemble method for oil transportation Pump Suction Nozzle |
| CN109884241A (en) * | 2019-03-05 | 2019-06-14 | 华电电力科学研究院有限公司 | A kind of SCR denitration simulation reaction device and analogy method |
| CN109847501A (en) * | 2019-03-12 | 2019-06-07 | 中国一冶集团有限公司 | A kind of enclosure wall dust pelletizing system of construction site |
| CN110215831A (en) * | 2019-03-14 | 2019-09-10 | 河北工程大学 | The device for homogenizing the denitration flow field section Pen An flue gas flow rate |
| CN110487695A (en) * | 2019-07-08 | 2019-11-22 | 佛山市顺德区阿波罗环保器材有限公司 | Strainability detection system of fume filtering element |
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Effective date of registration: 20200907 Address after: 100027 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: SINOPEC ENGINEERING Inc. Patentee after: China Petroleum & Chemical Corp. Co-patentee after: Sinopec Engineering (Group) Co.,Ltd. Address before: Anhui Beili Anyuan 21 No. 100101 Beijing Chaoyang District City Co-patentee before: Sinopec Engineering (Group) Co.,Ltd. Patentee before: SINOPEC ENGINEERING Inc. |