CN207371352U - SCR denitration ammoniates and even flow field structure - Google Patents
SCR denitration ammoniates and even flow field structure Download PDFInfo
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- CN207371352U CN207371352U CN201720669583.6U CN201720669583U CN207371352U CN 207371352 U CN207371352 U CN 207371352U CN 201720669583 U CN201720669583 U CN 201720669583U CN 207371352 U CN207371352 U CN 207371352U
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Abstract
The utility model provides a kind of SCR denitration ammonification and even flow field structure, designs reasonable, ammonia and flue gas is uniformly mixed, flow field is reasonable, local resistance is small, configuration is simple.Ammonification and hybrid system are mounted in straightway flue；Ammonification pipe series are fixed in straightway flue；Ammonification pipe series are provided with ammonification hole；Bridge insert component is fixed in straightway flue, and is arranged above ammonification hole；Bridge insert component is made of bridge insert；The outer corner of elbow section flue is made of outer top rake plate, and outer top rake plate is planar shaped；The interior corner of elbow section flue is made of Inner arc plate, and Inner arc plate is arc surfaced；Front flow guiding plate is fixed in elbow section flue, and front flow guiding plate is arc surfaced；Deflector is fixed in the import of reactor afterwards, and is arc surfaced；Commutation system includes rectification unit module；Rectification unit module is fixed in reactor, positioned at the top of the first layer catalyst of reactor.
Description
Technical field
The utility model is related to a kind of ammonification of SCR denitration and even flow field structures.
Background technology
SCR gas denitrifying technologies are to apply a kind of most, most ripe effective denitrating flue gas Treatment process in the world at present,
As shown in the Chinese patent of Application No. 201420182708.9；
SCR gas denitrifying technology key reaction steps are：NO in flue gasxAnd NH3Free diffusing to the surface of catalyst,
Hence into micropore inside, under the effect of the catalyst, the NO in flue gasxAnd NH3Generation reduction reaction, the N of generation2And H2O from
It is desorbed in catalyst micropore, catalyst surface is diffused to, with flue gas emission.Wherein influence SCR denitration efficiency it is main because
It is known as：Ammonia nitrogen molar ratio, reaction time, reaction temperature etc..When in SCR denitration system there are ammonia and flue gas mixing it is uneven,
During the problems such as flow field is chaotic, the operating status of denitration efficiency and system will be directly fed back to.Morbid state work for a long time, it will cause
The a series of operation problems such as system resistance increases, catalyst abrasion aggravation, ammonia residual improves, the escaping of ammonia change is more.
Utility model content
The purpose of the utility model is to overcome above-mentioned deficiency in the prior art, and provide it is a kind of design rationally,
Ammonia and flue gas are uniformly mixed, flow field is reasonable, local resistance is small, the simple SCR denitration of configuration ammoniates and even flow field structure.
The technical scheme in the invention for solving the above technical problem is：A kind of SCR denitration ammonification and even flow field knot
Structure, including flue, ammonification and hybrid system, flow guide system, commutation system and reactor；Flue is divided into straightway flue and elbow
Section flue, the import of straightway flue, elbow section flue, reactor are sequentially communicated, and elbow section flue is elbow shape；Its feature exists
In：Further include ammonification and hybrid system, flow guide system and commutation system；Ammonification and hybrid system are mounted in straightway flue,
It includes ammoniating pipe series and bridge insert component；Ammonification pipe series are fixed in straightway flue；Ammonification pipe series, which are provided with, to be added
Ammonia hole；Bridge insert component is fixed in straightway flue, and is arranged above ammonification hole；Bridge insert component is made of bridge insert；
Flow guide system includes outer top rake elbow flow guide system and reactor inlet flow guide system；Outer top rake elbow flow guide system includes leading
Flowing plate, outer top rake plate and Inner arc plate；The outer corner of elbow section flue is made of outer top rake plate, and outer top rake plate is planar shaped；
The interior corner of elbow section flue is made of Inner arc plate, and Inner arc plate is arc surfaced；Front flow guiding plate is fixed on elbow section flue
Interior, front flow guiding plate is arc surfaced；Reactor inlet flow guide system includes rear deflector, and rear deflector is fixed on the import of reactor
It is interior, and be arc surfaced；Commutation system includes rectification unit module；Rectification unit module is fixed in reactor, positioned at reactor
First layer catalyst top.
Ammonification piping described in the utility model is classified as two, respectively ammoniates pipe a series and ammonification pipe b series, ammonification
Pipe b series is located at ammonification pipe a series top；Ammonification pipe a series is directly weldingly fixed in straightway flue；The ammonification and
Hybrid system further includes support angle steel and U-shaped card hoop；Support angle steel is fixed in straightway flue, and U-shaped card hoop is fixed on support
On angle steel；Ammonification pipe b series one end is weldingly fixed in straightway flue, and the other end is fixed by U-shaped card hoop；Ammoniate pipe a systems
The both sides of row and ammonification pipe b series are respectively arranged with the ammonification hole.
Bridge insert component described in the utility model is two, is respectively first layer bridge insert component and second layer bridge insert
Component；First layer bridge insert component is located at below second layer bridge insert component；Bridge insert in first layer bridge insert component and
Bridge insert in two layers of bridge insert component is arranged in mutual sequence.
Inner arc plate center described in the utility model is protected to the vertical range of outer top rake plate and the width of straightway flue
It holds consistent.
Front flow guiding plate described in the utility model is two pieces, is front flow guiding plate a and front flow guiding plate b, front flow guiding plate a and leading
Flowing plate b is in inside and outside setting；Front flow guiding plate is consistent with the radian of Inner arc plate.
Deflector is two pieces after described in the utility model, and in setting up and down, deflector is by the import of reactor after two pieces
Three equal parts are divided into the height direction.
Rectification unit module described in the utility model is formed by smooth vertical and horizontal steel plate splicing.
The gross area in ammonification hole described in the utility model and the sectional area ratio of ammonification pipe series are 0.5.
+ 1/3 elbow section flue width of the radius of the utility model front flow guiding plate a=Inner arc plate radius, radian are 90 °；
+ 2/3 elbow section flue width of the radius of front flow guiding plate b=Inner arc plate radius, radian are 90 °.
The utility model compared with prior art, has the following advantages and effect：
(1) the utility model can be such that the ammonia of addition is effectively mixed with flue gas, and system is reduced while flow field is optimized
Local resistance ensures reasonable layout, the equalization of flue gas flow rate of first layer catalyst inlet ammonia, it is optimal to be finally reached design
Denitration efficiency.
(2) ammoniate pipe a series and ammonification pipe b series makes and sequence is simple, ammonia shape in the ammonification hole of adjacent ammonification pipe
Into liquidating, aggravation disturbance promotes mixing.
(3) divide the bridge insert of two layers of dislocation arrangement, while mixed effect is reached, reduce resistance.
(4) structure of outer top rake elbow flow guide system slows down impact of the flue gas to elbow, adds uniformly distributed property, rush property
The gentle transition of flue gas.
(5) outer top rake plate makes simple, only three blocks of steel plates is needed to be welded by size.
(6) ensure that flue gas enters the equiblibrium mass distribution of commutation system, into one from arrangement by the Spatial zonation to rear deflector
Step optimization flue gas flow rate, plays real-time guiding function.
(7) modular rectifier unit is easy for installation, and simple combination superposition is i.e. cleavable to adjust flue gas.
Description of the drawings
Fig. 1 is the structure diagram of the utility model embodiment.
Fig. 2 is the enlarged structure schematic diagram of D parts in Fig. 1.
Fig. 3 is the A-A schematic cross-sectional views of Fig. 2.
Fig. 4 is the B-B schematic cross-sectional views of Fig. 2.
Fig. 5 is the C-C schematic cross-sectional views of Fig. 2.
Fig. 6 is the enlarged structure schematic diagram of E parts in Fig. 1.
Fig. 7 is the enlarged structure schematic diagram of F parts in Fig. 1.
Fig. 8 is the utility model embodiment commutation system overlooking the structure diagram.
Fig. 9 is the utility model embodiment flow velocity overall distribution figure.
Figure 10 is the utility model embodiment ammonia density overall distribution figure.
Specific embodiment
Below in conjunction with the accompanying drawings and pass through embodiment the utility model is described in further detail, following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Referring to Fig. 1-Figure 10, the ammonification of the utility model embodiment SCR denitration and even flow field structure include flue, ammonification and
Hybrid system 1, flow guide system, commutation system 6 and reactor 7.
Flue is divided into straightway flue 2a and elbow section flue 2b.Straightway flue 2a, elbow section flue 2b, reactor 7
Import be sequentially communicated.Straightway flue 2a is vertically arranged.Elbow section flue 2b is elbow shape.Elbow section flue 2b and reactor
7 import is connected by expansion joint 4.
Ammonification and hybrid system 1 are mounted in straightway flue 2a, including ammonification pipe series, ammonification hole 1-3, strut angle
Steel 1-4, U-shaped card hoop 1-5, bridge insert component and support round steel 1-7.
It ammoniates and ammonification hole 1-3 is provided on the two sides of pipe.In the present embodiment, ammonification piping is classified as two, respectively adds
Ammonia pipe a series 1-1 and ammonification pipe b series 1-2, ammonification pipe b series 1-2 are located above ammonification pipe a series 1-1.
Ammonification pipe a series 1-1 is directly weldingly fixed on the siding of straightway flue 2a.
Support angle steel 1-4 is fixed on the siding of straightway flue 2a, and U-shaped card hoop 1-5 is fixed on support angle steel 1-4.
Ammonification pipe b series 1-2 one end is weldingly fixed on the siding of straightway flue 2a, and the other end is fixed by U-shaped card hoop 1-5.
Ammonification hole 1-3 is respectively arranged on the two sides of ammonification pipe a series 1-1 and ammonification pipe b series 1-2, ammoniates hole 1-3
The gross area with ammonification pipe series sectional area ratio be 0.5.Hole 1-3 is ammoniated towards side.
Bridge insert component is fixed in straightway flue 2a, and is arranged at directly over ammonification hole 1-3.Bridge insert component is by mixing
Flowing plate 1-6 is formed.
In the present embodiment, bridge insert component is two, is respectively first layer bridge insert component 1-8 and second layer bridge insert group
Part 1-9.First layer bridge insert component 1-8 and second layer bridge insert component 1-9 are by supporting round steel 1-7 to be fixed on straightway flue
On the siding of 2a, the two is by supporting round steel 1-7 to form entirety.First layer bridge insert component 1-8 is located at second layer bridge insert group
Below part 1-9.The bridge insert 1-6 in bridge insert 1-6 and second layer bridge insert component 1-9 in first layer bridge insert component 1-8
It is arranged in mutual sequence.
Ammoniate pipe a series 1-1 and ammoniate the spacing between pipe b series 1-2 as 200mm, first layer bridge insert component 1-8 and
Spacing between second layer bridge insert component 1-9 is 500mm, is ammoniated between pipe a series 1-1 and ammonification pipe b series 1-2, first
Layer bridge insert component 1-8 and second layer bridge insert component 1-9 between rationally spacing setting, taken into full account mixing time and
Distant effect；
Flow guide system includes outer top rake elbow flow guide system 3 and reactor inlet flow guide system 5.
Outer top rake elbow flow guide system 3 includes front flow guiding plate, outer top rake plate 3-4 and Inner arc plate 3-3.
The outer corner of elbow section flue 2b is made of outer top rake plate 3-4, and outer top rake plate 3-4 is planar shaped so that elbow
The outer corner of section flue 2b is in top rake shape.The interior corner of elbow section flue 2b is made of Inner arc plate 3-3, Inner arc plate 3-
3 be arc surfaced, is specially arc surface shape.Inner arc plate 3-3 centers are to vertical range and the straightway flue 2a of outer top rake plate 3-4
Width be consistent.The radius of Inner arc plate 3-3 is 0.2 with the ratio of straightway flue 2a width.
Front flow guiding plate is fixed in elbow section flue 2b, and front flow guiding plate is arc surfaced.In the present embodiment, front flow guiding plate two
Block is in inside and outside setting for front flow guiding plate a3-1 and front flow guiding plate b3-2, front flow guiding plate a3-1 and front flow guiding plate b3-2.Front flow guiding plate
Consistent with the radian of Inner arc plate 3-3, front flow guiding plate a3-1 and front flow guiding plate b3-2 can regard the equidistant expansions of Inner arc plate 3-3 as
Scattered derivative.+ 1/3 elbow section flue 2b width of the radius of front flow guiding plate a3-1=Inner arc plate 3-3 radiuses, radian are
90°.+ 2/3 elbow section flue 2b width of the radius of front flow guiding plate b3-2=Inner arc plate 3-3 radiuses, radian are 90 °.
Reactor inlet flow guide system 5 includes rear deflector 5-1.Deflector 5-1 is fixed in the import of reactor 7 afterwards.
Deflector 5-1 is arc surfaced afterwards, and radius 1500mm, radian is 20 °.In the present embodiment, rear deflector 5-1 is two pieces, is in
Setting up and down, the import of reactor 7 is divided into three equal parts by deflector 5-1 in the height direction after two pieces.Deflector 5-1 afterwards
Left side starting point is with the inclination angle starting point at the top of 90 degree of turnings of 7 inside of reactor and reactor 7 in same vertical direction.
Commutation system 6 includes rectification unit module and support square steel 6-4.
Rectification unit module is by supporting square steel 6-4 to be fixed in reactor 7, positioned at the top of first layer catalyst 8.This
In embodiment, rectification unit module is divided into three groups, is rectification unit module a6-1, rectification unit module b6-2 and rectification unit mould
Block c6-3, rectification unit module a6-1, rectification unit module b6-2 and rectification unit module c6-3 respectively have 3 pieces, share 9 moulds
Block is combined into the square formation of aligned orderly.
Rectification unit module is formed by smooth vertical and horizontal steel plate splicing, between the longitudinal direction of the steel plate of different rectification unit modules
Away from the needs according to flow field and from the synergistic effect of reactor inlet flow guide system 5, different sizes are set.
A kind of SCR denitration ammonification and the operation method of even flow field structure：
In straightway flue 2a from bottom to top, ammonia is from ammonification pipe a series 1-1 and ammoniates adding for pipe b series 1-2 for flue gas
It projects rapidly in the 1-3 of ammonia hole, is taken away after the diffusion that liquidates by flue gas, under bridge insert 1-6 stops, amino molecule is further broken up,
Accelerate to shunt to bridge insert 1-6 both sides, as shown in Figure 9 and Figure 10.One section of vertical gas pass after second layer bridge insert 1-9
Be sufficiently mixed, amino molecule is dispersed in flue gas.Outer top rake elbow flow guide system 3 and reactor inlet flow guide system 5 are right
Uniformly mixed flue gas plays gentle guide functions, while the resistance of generation is reduced to minimum, is that commutation system 6 is final
It lays the foundation to the cutting distribution of flue gas.
Flue gas in reactor 7 flows from above to below, and rectification unit module and adjust flue gas is evenly distributed, and reaches first
During layer 8 top of catalyst, sufficiently uniform axial velocity profile, flue gas average speed 4.95m/s, standard deviation ensure that
0.443m/s, relative deviation 8.95%<15%, 8 top NH of first layer catalyst3Concentration relative deviation 2.64%<5%, it is full
The requirement of sufficient design and use.
In addition, being simulated through computer, the resistance of SCR denitration ammonification and even flow field system is 180Pa, is reaching denitration effect
While rate, the cost of system operation is reduced.
The utility model is directed to the operation flow field of multi-state, and all round computer numerical simulation result optimizes, wherein ammonia
The mixing of gas and flue gas uses Multicomponent Model, while considers the influence of convection current, concentration diffusion and turbulent flow to mixing.
Above content described in this specification is only to the utility model structure example explanation；Moreover,
The title that the utility model each several part is taken can not also be same, all constructions according to described in the utility model patent concept, feature and
The equivalent or simple change that principle is done, is included in the protection domain of the utility model patent.
Claims (9)
1. a kind of SCR denitration ammonification and even flow field structure, including flue, ammonification and hybrid system, flow guide system, commutation system
And reactor；Flue is divided into straightway flue and elbow section flue, straightway flue, elbow section flue, reactor import according to
Secondary connection, elbow section flue are elbow shape；It is characterized in that：Further include ammonification and hybrid system, flow guide system and commutation system；
Ammonification and hybrid system are mounted in straightway flue, including ammonification pipe series and bridge insert component；Ammonification pipe series are fixed
In straightway flue；Ammonification pipe series are provided with ammonification hole；Bridge insert component is fixed in straightway flue, and is arranged at and is added
Above ammonia hole；Bridge insert component is made of bridge insert；Flow guide system includes outer top rake elbow flow guide system and reactor inlet is led
Streaming system；Outer top rake elbow flow guide system includes front flow guiding plate, outer top rake plate and Inner arc plate；The outer corner of elbow section flue
It is made of outer top rake plate, outer top rake plate is planar shaped；The interior corner of elbow section flue is made of Inner arc plate, and Inner arc plate is
Arc surfaced；Front flow guiding plate is fixed in elbow section flue, and front flow guiding plate is arc surfaced；Reactor inlet flow guide system is led after including
Flowing plate, rear deflector are fixed in the import of reactor, and are arc surfaced；Commutation system includes rectification unit module；Rectification list
Element module is fixed in reactor, positioned at the top of the first layer catalyst of reactor.
2. SCR denitration ammonification according to claim 1 and even flow field structure, it is characterised in that：The ammonification piping
Two are classified as, respectively ammoniates pipe a series and ammonification pipe b series, ammonification pipe b series is located at ammonification pipe a series top；Ammonification pipe
A series is directly weldingly fixed in straightway flue；The ammonification and hybrid system further includes support angle steel and U-shaped card hoop；
Support angle steel is fixed in straightway flue, and U-shaped card hoop is fixed in support angle steel；Ammonification pipe b series one end is weldingly fixed on
In straightway flue, the other end is fixed by U-shaped card hoop；The both sides of ammonification pipe a series and ammonification pipe b series are respectively arranged with institute
The ammonification hole stated.
3. SCR denitration ammonification according to claim 1 and even flow field structure, it is characterised in that：The bridge insert group
Part is two, is respectively first layer bridge insert component and second layer bridge insert component；First layer bridge insert component is located at the second layer
Below bridge insert component；The bridge insert in bridge insert and second layer bridge insert component in first layer bridge insert component is in mutually to be staggered
Position arrangement.
4. SCR denitration ammonification according to claim 1 and even flow field structure, it is characterised in that：The Inner arc plate
The vertical range and the width of straightway flue of center to outer top rake plate are consistent.
5. SCR denitration ammonification according to claim 1 and even flow field structure, it is characterised in that：The front flow guiding plate
It is in inside and outside setting for front flow guiding plate a and front flow guiding plate b, front flow guiding plate a and front flow guiding plate b for two pieces；Front flow guiding plate and Inner arc
The radian of plate is consistent.
6. SCR denitration ammonification according to claim 1 and even flow field structure, it is characterised in that：The rear deflector
For two pieces, in setting up and down, the import of reactor is divided into three equal parts by deflector in the height direction after two pieces.
7. SCR denitration ammonification according to claim 1 and even flow field structure, it is characterised in that：The rectification unit
Module is formed by smooth vertical and horizontal steel plate splicing.
8. SCR denitration ammonification according to claim 1 and even flow field structure, it is characterised in that：The ammonification hole
The sectional area ratio of the gross area and ammonification pipe series is 0.5.
9. SCR denitration ammonification according to claim 2 and even flow field structure, it is characterised in that：The radius of front flow guiding plate a
+ 1/3 elbow section flue width of=Inner arc plate radius, radian are 90 °；The radius of front flow guiding plate b=Inner arc plate radius+2/3
Elbow section flue width, radian are 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669583.6U CN207371352U (en) | 2017-06-09 | 2017-06-09 | SCR denitration ammoniates and even flow field structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669583.6U CN207371352U (en) | 2017-06-09 | 2017-06-09 | SCR denitration ammoniates and even flow field structure |
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| CN207371352U true CN207371352U (en) | 2018-05-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126835A (en) * | 2017-06-09 | 2017-09-05 | 中国联合工程公司 | A kind of SCR denitration ammonification and even flow field structure and its operation method |
| CN109210950A (en) * | 2018-08-03 | 2019-01-15 | 首钢集团有限公司 | A kind of chain grate machine |
| CN109395576A (en) * | 2018-09-14 | 2019-03-01 | 哈尔滨锅炉厂有限责任公司 | The guiding device of SCR denitration device |
-
2017
- 2017-06-09 CN CN201720669583.6U patent/CN207371352U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126835A (en) * | 2017-06-09 | 2017-09-05 | 中国联合工程公司 | A kind of SCR denitration ammonification and even flow field structure and its operation method |
| CN109210950A (en) * | 2018-08-03 | 2019-01-15 | 首钢集团有限公司 | A kind of chain grate machine |
| CN109395576A (en) * | 2018-09-14 | 2019-03-01 | 哈尔滨锅炉厂有限责任公司 | The guiding device of SCR denitration device |
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