CN206325403U - A kind of efficient SCR reactors of flaring entrance - Google Patents
A kind of efficient SCR reactors of flaring entrance Download PDFInfo
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- CN206325403U CN206325403U CN201621429399.6U CN201621429399U CN206325403U CN 206325403 U CN206325403 U CN 206325403U CN 201621429399 U CN201621429399 U CN 201621429399U CN 206325403 U CN206325403 U CN 206325403U
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- deflectors
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- flaring
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Abstract
A kind of efficient SCR reactors of flaring entrance belong to the internal structure of SCR denitration reactor.Reactor is made up of entrance, main paragraph and outlet section, and reactor is in integrally symmetrical structure；Reactor inlet section is using the form of flaring, i.e. the linkage section section of flue and reactor body gradually expands.Reactor inlet at least needs to set 3 layers of deflector, that is, 1#~3#, can add 4# deflectors or more.1# deflectors are located at reactor inlet section top, and its top connects with reactor inlet section with the interface of flue；2# and 3# deflectors are located at the middle part of reactor inlet section.2# and 3# deflectors are the key equipments of this reactor, are made up of the deflector being pointed to more on sustained height, and the arranged direction of 2# and 3# deflectors is mutually perpendicular to.This reactor is by adjusting 1#~3# deflectors, you can meet flow field technical requirement (CV values are less than 15%).
Description
Technical field
The utility model is related to a kind of flaring entrance (the linkage section section of flue and reactor body gradually expands)
The internal structure of SCR denitration reactor, the form of structure and deflector more particularly, to a kind of SCR denitration reactor inlet section
And arrangement.
Background technology
SCR is a kind of efficient gas denitrifying technology, is widely used in boiler, stove and other a large amount of nitrogen oxides of generation
Industrial plants denitration administer.The denitration efficiency of SCR technology is influenceed by factors, and wherein Flow Field Distribution is most important skill
One of art index.The examination face of Flow Field Distribution uniformity is on the cross section at first layer catalyst surface upstream 0.5m, it is desirable to
Maximum deviation coefficient (CV)≤15%, CV definition of the velocity of flue gas distribution of the section part is：
Wherein：
Average value
Vi：Sampled value
N：Sampling number
SCR inside reactor flue gas flow rates are higher, and influenceed by dust content, and to avoid the deposition of dust, flue gas is usual
From vertical flue vertically upward, reactor head region, then flow down are then entered by horizontal flue, sequentially passes through rectification
Device and catalyst, are finally discharged from reactor outlet.Smoke inlet is generally with reactor body into being arranged vertically.Conventional reaction
Device schematic diagram is shown in Fig. 1, it can be seen that to ensure even flow field, the width H of General reactions device entrance is that reactor body is wide
H is spent, and reactor inlet section is in horizontally disposed, with vertically arranged reactor body in 90 ° of angles.Through deflector and rectifier
Afterwards, flue gas completes 90 degree of steering and forms more uniform VELOCITY DISTRIBUTION, and the Optimization Work of the reactor of this form is only needed
The distribution of X-direction overdraught is adjusted by setting up deflector.
But it is some in particular cases, reactor inlet section can not use horizontally disposed form, and use a kind of flaring
Form, as shown in Figure 2.It is characterized in that smoke inlet section and reactor body are in same vertical direction, reactor inlet section X
The width H1 flarings in direction to H2, Y-direction width H3 flarings to H4.That is the speed while in regulation X, Y-direction is needed
Degree distribution could meet technical requirement.The form and arrangement of conventional deflector can not meet fluid distrbution index will
Ask.
The design and optimization process of deflector are complicated, if design is improper, the flow field index of reactor can not meet requirement,
But also very big abrasion risk can be brought.The design and Optimization Work of deflector usually require the long period, usually as shadow
Ring one of key factor of project progress.Therefore, a kind of efficient SCR reactors of flaring entrance are researched and developed and seems particularly urgent.
The content of the invention
It is to solve the above problems that the purpose of this utility model, which is exactly, using advanced CFD software star-ccm+, and is combined
Physical model is tested, and devises a kind of efficient SCR reactors of flaring entrance, schematic diagram is shown in Fig. 2.1. a kind of flaring entrance
Efficient SCR reactors, reactor is made up of entrance, main paragraph and outlet section, and reactor is in integrally symmetrical structure, its feature
It is：
Reactor inlet section is using the form of flaring, i.e. the linkage section section of flue and reactor body gradually expands；
Reactor inlet is located in reactor inlet section at least provided with 3 layers of deflector, that is, 1#~3#, 1# deflector
Portion, its top connects with reactor inlet section with the interface of flue；
2# and 3# deflectors are located at the middle part of reactor inlet section, are made up of the deflector being pointed to more on sustained height,
The arranged direction of 2# and 3# deflectors is mutually perpendicular to；Laid into splayed configuration in each pair deflector section.
The most narrow spacing 2. further, the minimum range between 2# and 3# deflector each pair deflectors is H12, two deflectors
It is H10,0 from the cross-sectional width for H11, deflector<H11<2H10,0<H12<2H10.
3. further, B is 2# deflectors and vertical direction angle, C is 3# deflectors and vertical direction angle；5°<B≤
45°,5°<C≤45°。
4. further, certain mounting distance H7,0 should be retained between 2# and 3# deflectors<H7≤50mm.
5. further, in reactor side view, hypotenuse and vertical direction angle are E；In reactor front view, hypotenuse is with hanging down
Straight angular separation is F；When F is 0 °, that is, entrance front view is when being rectangle, 2# deflectors is only set, or set simultaneously
It is equipped with 2# and 3# deflectors.
6. further, being additionally provided with 4# deflectors, 4# deflectors are located at reactor inlet pars infrasegmentalis.4# deflectors bottom with
Height H9 between rectifier is the setting height(from bottom) retained, 0<H9≤50mm.
8. further, any part increases deflector between 1# and 2#, 3# and 4#；Increase deflector, which must be set, to incline
Inclined portion point is to be uniformly distributed flow velocity, and the angle of sloping portion and vertical direction is A and D, and A and D are no more than 60 °.
CFD software numerical simulation is mainly used with drag：
(1) gas phase turbulance model
A) continuity equation：
B) equation of momentum of X-direction：
C) equation of momentum in Y-direction：
D) equation of momentum in Z-direction：
E) K equations：
F) ε equations：
Wherein, coefficient of eddy viscosityP is Fluid pressure；ρ is gas density；Turbulent flow produces item GkFor：
The above differential equation, can be write as following common version：
Wherein, φ is dependent variable, ΓφFor dependent variable φ diffusion coefficient, SφTo be corresponding in dependent variable conservation equation
Source item.
Being expressed as unified transport equation form is：
Items are from left to right followed successively by convective term, diffusion term and source item in formula.
(2) porous media model
For the catalyst layer pressure drop in SCR reactors, it is simulated by regarding catalyst layer as porous media.It is pressed
Drop loss simulation formula is as follows：
Momentum source term, Pa/m on Si-i directions in formula；μ-mobilization dynamic viscosity, Pas；α-medium permeability；vi—
I is to velocity component, m/s；ρ-density, kg/m3；C2- internal drag the factor, 1/m.
The setting of physical model is defined using the nondimensionalization of characteristic of fluid amount, wherein having Reynolds number, Euler's numbers, Bath
Number, Fourier number and model geometric ratio value.
Main contents of the present utility model include：(1) reactor is made up of entrance, main paragraph and outlet section, reactor
Overall is in symmetrical structure；(2) reactor inlet section using flaring form, i.e., the linkage section section of flue and reactor body by
Flaring is big.Wherein, in side view, hypotenuse and vertical direction angle are E；In front view, hypotenuse and vertical direction angle are F；(3)
Reactor inlet is at least needed to set 3 layers of deflector, that is, 1#~3#, and 4# deflectors are added as the case may be.(4) 2# and 3#
Deflector is the key equipment of this invention, is made up of the deflector being pointed to more on sustained height, the cloth of 2# and 3# deflectors
Direction is put to be mutually perpendicular to (2# deflectors arrange that 3# deflectors are arranged in X direction along Y-direction).Each pair deflector section is into eight words
Type is laid, and the minimum range the minimum range between each pair deflector is H12, two deflectors is H11, and the section of deflector is wide
Spend for H10,0<H11<2H10,0<H12<2H10.B is 2# deflectors and vertical direction angle, and C is 3# deflectors and vertical direction
Angle.5°<B≤45°,5°<C≤45°.2#, 3# deflector are located adjacent at the 1/2 of divergent segment height, that is, H6 ≈ H8 ≈
(1/2)H5.It should retain certain mounting distance H7,0 between 2# and 3# deflectors<H7≤50mm.When such as F is 0 °, that is,
When entrance front view is rectangle, 2# deflectors can be only set.
(5) 1#, 4# deflector are the auxiliary equipment of this invention.1# deflectors according to circumstances can be only set；1# water conservancy diversion
Plate is located at reactor inlet section top, and its top connects with reactor inlet section with the interface of flue.4# deflectors are located at anti-
Answer device entrance pars infrasegmentalis, and its bottom and the interface top of reactor inlet section and reactor body section.
Can also be in (need to realize be more uniformly distributed Flow Field Distribution effect) as the case may be, in 1# and 2#, 3# and 4#
Between any part increase deflector.The form of deflector can be various, but must set sloping portion with uniform
Flow velocity is distributed, it is A and D with the angle of vertical direction, and A and D are usually no more than 60 °.
The utility model can realize following functions：
By adjusting 1#~4# deflectors, you can meet flow field technical requirement (CV values be less than 15%), see Figure 11 and
Figure 12.
Brief description of the drawings
Fig. 1 is the structural representation of traditional SCR reactors.
Fig. 2 is the structural representation of SCR reactors of the present utility model.
Fig. 3 is SCR reactor inlets section of the present utility model and baffle arrangement schematic diagram.
Fig. 4 be SCR reactor inlets of the present utility model section and deflector perspective view (a corresponds to 1#, 2#, 4# deflector,
B corresponds to 1#, 3#, 4# deflector, and c corresponds to 1#, 2#, 3#, 4# deflector).
Fig. 5 is the overall velocity profile (being not provided with flue deflector, CV=34%) of traditional SCR inside reactors.
Fig. 6 is traditional SCR reactor catalysts upstream flow rate distribution map (being not provided with flue deflector, CV=34%).
Fig. 7 is the overall velocity profile of traditional SCR inside reactors (setting flue deflector, CV=15%).
Fig. 8 is traditional SCR reactor catalysts upstream flow rate distribution map (setting flue deflector, CV=15%).
Fig. 9 is that the overall velocity profile of SCR inside reactors of the present utility model (is not provided with flue deflector, CV=
33%).
Figure 10 is that SCR reactor catalysts upstream flow rate distribution map of the present utility model (is not provided with flue deflector, CV=
33%).
Figure 11 is that the overall velocity profile of SCR inside reactors of the present utility model (sets flue deflector, CV=
8.3%).
Figure 12 is that SCR reactor catalysts upstream flow rate distribution map of the present utility model (sets flue deflector, CV=
8.3%).
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Reactor is made up of entrance, main paragraph and outlet section, and reactor is in integrally symmetrical structure.
Reactor inlet section is using the form of flaring, i.e. the linkage section section of flue and reactor body gradually expands.Its
In, in side view, hypotenuse and vertical direction angle are E；In front view, hypotenuse and vertical direction angle are F.
Reactor inlet is at least needed to set 3 layers of deflector, that is, 1#~3#, and 4# deflectors are added as the case may be.
2# and 3# deflectors are the key equipments of this invention, are made up of the deflector being pointed to more on sustained height, 2#
It is mutually perpendicular to (2# deflectors arrange that 3# deflectors are arranged in X direction along Y-direction) with the arranged direction of 3# deflectors.Each pair is led
Flow plate section to lay into splayed configuration, the minimum range the minimum range between each pair deflector is H12, two deflectors is H11,
The cross-sectional width of deflector is H10,0<H11<2H10,0<H12<2H10.B is 2# deflectors and vertical direction angle, and C leads for 3#
Flow plate and vertical direction angle.5°<B≤45°,5°<C≤45°.2#, 3# deflector are located adjacent at the 1/2 of divergent segment height,
Namely H6 ≈ H8 ≈ (1/2) H5.It should retain certain mounting distance H7,0 between 2# and 3# deflectors<H7≤50mm.Such as F
For 0 ° when, that is, entrance front view be rectangle when, can only set 2# deflectors.
1#, 4# deflector are the auxiliary equipment of this invention.1# deflectors according to circumstances can be only set；1# deflectors position
In reactor inlet section top, its top connects with reactor inlet section with the interface of flue.4# deflectors are located at reactor
Entrance pars infrasegmentalis, and its bottom and the interface top of reactor inlet section and reactor body section.
Can also be in (need to realize be more uniformly distributed Flow Field Distribution effect) as the case may be, in 1# and 2#, 3# and 4#
Between any part increase deflector.The form of deflector can be various, but must set sloping portion with uniform
Flow velocity is distributed, it is A and D with the angle of vertical direction, and A and D are usually no more than 60 °.
Further, the height H9 i.e. between 4# deflectors bottom and rectifier is the setting height(from bottom) retained, 0<H9≤
50mm。
The utility model specific embodiment is as follows：
(1) reactor parameter
Reactor is made up of entrance, main paragraph and outlet section, and reactor is in integrally symmetrical structure；
Reactor cross-section gas flow rate should be controlled in below 6m/s.
Processing tolerance is not limited.
(2) reactor inlet section parameter
Reactor inlet section is using the form of flaring, i.e. the linkage section section of flue and reactor body gradually expands.Its
In, in side view, hypotenuse and vertical direction angle are E；In front view, hypotenuse and vertical direction angle are F；E and F at least one
Individual is not 0 °.E≤45 °, F≤45 °.
(3) reactor inlet section water conservancy diversion board parameter
Reactor inlet is at least needed to set 3 layers of deflector, that is, 1#~3#, and 4# deflectors are added as the case may be.
2# and 3# deflectors are the key equipments of this invention, are made up of the deflector being pointed to more on sustained height, 2#
It is mutually perpendicular to (2# deflectors arrange that 3# deflectors are arranged in X direction along Y-direction) with the arranged direction of 3# deflectors.Each pair is led
Flow plate section to lay into splayed configuration, the minimum range the minimum range between each pair deflector is H12, two deflectors is H11,
The cross-sectional width of deflector is H10,0<H11<2H10,0<H12<2H10.B is 2# deflectors and vertical direction angle, and C leads for 3#
Flow plate and vertical direction angle.5°<B≤45°,5°<C≤45°.2#, 3# deflector are located adjacent at the 1/2 of divergent segment height,
Namely H6 ≈ H8 ≈ (1/2) H5.It should retain certain mounting distance H7,0 between 2# and 3# deflectors<H7≤50mm.Such as F
For 0 ° when, that is, entrance front view be rectangle when, can only set 2# deflectors.
1#, 4# deflector are the auxiliary equipment of this invention.1# deflectors according to circumstances can be only set；1# deflectors position
In reactor inlet section top, its top connects with reactor inlet section with the interface of flue.4# deflectors are located at reactor
Entrance pars infrasegmentalis, and its bottom and the interface top of reactor inlet section and reactor body section.
Can also be in (need to realize be more uniformly distributed Flow Field Distribution effect) as the case may be, in 1# and 2#, 3# and 4#
Between any part increase deflector.The form of deflector can be various, but must set sloping portion with uniform
Flow velocity is distributed, it is A and D with the angle of vertical direction, and A and D are usually no more than 60 °.
By adjusting 1#~4# deflectors, you can meet SCR reactors flow field index request.
Exhaust gas volumn is 600,000 Nm3/ h, cross-sectional gas flow velocity is 4.2m/s, and E is 15 °, and F is 6 °, and A is 6 °~25 °, and B is
20 °, C is 15 °, and D is 7 °~20 °, and H7=50mm, CV is 8.3%.
Exhaust gas volumn is 200,000 Nm3/ h, cross-sectional gas flow velocity is 4.0m/s, and E is 11 °, and F is 0 °, and A is 0 °~9 °, and B is
20 °, 3# deflectors are not provided with, D is 0 °~7 °, and H7=30mm, CV is 11.0%.
Claims (8)
1. a kind of efficient SCR reactors of flaring entrance, reactor is made up of entrance, main paragraph and outlet section, reactor
Overall is in symmetrical structure, it is characterised in that：
Reactor inlet section is using the form of flaring, i.e. the linkage section section of flue and reactor body gradually expands；
Reactor inlet is located at reactor inlet section top at least provided with 3 layers of deflector, that is, 1#~3#, 1# deflector, its
Top connects with reactor inlet section with the interface of flue；
2# and 3# deflectors be located at reactor inlet section middle part, be made up of the deflector being pointed to more on sustained height, 2# and
The arranged direction of 3# deflectors is mutually perpendicular to；Laid into splayed configuration in each pair deflector section.
2. a kind of efficient SCR reactors of flaring entrance according to claim 1, it is characterised in that：
Minimum range minimum range between 2# and 3# deflector each pair deflectors is H12, two deflectors is H11, water conservancy diversion
The cross-sectional width of plate is H10,0<H11<2H10,0<H12<2H10.
3. a kind of efficient SCR reactors of flaring entrance according to claim 1, it is characterised in that：
B is 2# deflectors and vertical direction angle, and C is 3# deflectors and vertical direction angle；5°<B≤45°,5°<C≤45°.
4. a kind of efficient SCR reactors of flaring entrance according to claim 1, it is characterised in that：
It should retain certain mounting distance H7,0 between 2# and 3# deflectors<H7≤50mm.
5. a kind of efficient SCR reactors of flaring entrance according to claim 1, it is characterised in that：
In reactor side view, hypotenuse and vertical direction angle are E；In reactor front view, hypotenuse is with vertical direction angle
F；When F is 0 °, that is, entrance front view is when being rectangle, 2# deflectors are only set, or are provided with 2# simultaneously and 3# is led
Flow plate.
6. a kind of efficient SCR reactors of flaring entrance according to claim 1, it is characterised in that：
4# deflectors are additionally provided with, 4# deflectors are located at reactor inlet pars infrasegmentalis.
7. a kind of efficient SCR reactors of flaring entrance according to claim 6, it is characterised in that：4# deflectors bottom
Height H9 between portion and rectifier is the setting height(from bottom) retained, 0<H9≤50mm.
8. a kind of efficient SCR reactors of flaring entrance according to claim 1, it is characterised in that：
Any part increases deflector between 1# and 2#, 3# and 4#；Increase deflector must set sloping portion with uniform
The angle of distribution flow velocity, sloping portion and vertical direction is A and D, and A and D are no more than 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621429399.6U CN206325403U (en) | 2016-12-24 | 2016-12-24 | A kind of efficient SCR reactors of flaring entrance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621429399.6U CN206325403U (en) | 2016-12-24 | 2016-12-24 | A kind of efficient SCR reactors of flaring entrance |
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ID=59291681
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731797A (en) * | 2016-12-24 | 2017-05-31 | 北京工业大学 | A kind of efficient SCR reactors of flaring entrance |
| CN107376642A (en) * | 2017-09-01 | 2017-11-24 | 北京晨晰环保工程有限公司 | A kind of SCR methods flue gas denitration reactor |
| CN109464891A (en) * | 2018-12-28 | 2019-03-15 | 启明星宇节能科技股份有限公司 | A kind of flue gas speed regulation device |
-
2016
- 2016-12-24 CN CN201621429399.6U patent/CN206325403U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731797A (en) * | 2016-12-24 | 2017-05-31 | 北京工业大学 | A kind of efficient SCR reactors of flaring entrance |
| CN107376642A (en) * | 2017-09-01 | 2017-11-24 | 北京晨晰环保工程有限公司 | A kind of SCR methods flue gas denitration reactor |
| CN107376642B (en) * | 2017-09-01 | 2020-02-14 | 北京晨晰环保工程有限公司 | SCR method flue gas denitration reactor |
| CN109464891A (en) * | 2018-12-28 | 2019-03-15 | 启明星宇节能科技股份有限公司 | A kind of flue gas speed regulation device |
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Granted publication date: 20170714 Termination date: 20201224 |