CN206082181U - Flue gas system of flow equalizing of low temperature SCR flue gas denitration reactor - Google Patents
Flue gas system of flow equalizing of low temperature SCR flue gas denitration reactor Download PDFInfo
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- CN206082181U CN206082181U CN201621037815.8U CN201621037815U CN206082181U CN 206082181 U CN206082181 U CN 206082181U CN 201621037815 U CN201621037815 U CN 201621037815U CN 206082181 U CN206082181 U CN 206082181U
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- flue gas
- flow equalizing
- warehouse
- gas flow
- equalizing system
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 239000003546 flue gas Substances 0.000 title claims abstract description 94
- 238000013461 design Methods 0.000 claims abstract description 27
- 230000003197 catalytic effect Effects 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 abstract description 39
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000006555 catalytic reaction Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 6
- 238000004056 waste incineration Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a flue gas system of flow equalizing of low temperature SCR flue gas denitration reactor, personally experience sth. Part of the body including the storehouse, be located the guiding device of storehouse body entrance with be located the fairing in storehouse body exit. This flue gas system of flow equalizing is applicable to low temperature SCR flue gas denitration catalytic reaction according to the operational characteristic design of msw incineration power plant, has improved catalyst reaction efficiency and catalyst utilization efficiency, this flue gas flow equalizes the overall structure of system and utilizes CFD simulation to design, satisfies the demand of flow equalizing, each the part design of this flue gas system of flow equalizing is simple and easy, is convenient for make the installation, the catalyst is maintained and changes in the dismountable design of as an organic wholeization of system of flow equalizing of this flue gas, easy access. To sum up, the utility model provides a flue gas system of flow equalizing of low temperature SCR flue gas denitration reactor for the flue gas gets into the reactor uniformly, has improved catalyst reaction efficiency and catalyst utilization efficiency, and the system of being convenient for simultaneously overhauls and changes with the catalyst.
Description
Technical field
This utility model is related to field of waste incineration, and specifically, it is anti-that this utility model is related to a kind of low-temperature SCR denitrating flue gas
Answer the flue gas flow equalizing system of device.
Background technology
With going from bad to worse for ecological environment, rubbish is treated as one of problem of extensive concern.In waste incineration
Cheng Zhonghui is produced and is contained NOx、SO2, the harmful substance such as HCl flue gas, needs are processed the flue gas, it is up to standard after can arrange
Put.NOxProcessing mode mainly has：SNCR method (SNCR) and selective catalytic reduction (SCR).Waste incineration
Power plant at present more adopts SNCR denitration technology, can reach the standard of European Union 2000.But with the raising of environmental requirement, some importance area
Domain has started to perform tightened up standard, and SNCR cannot meet requirement, need to adopt highly efficient SCR technology.
SCR denitration is under conditions of catalyst is present so that NOxWith reducing agent NH3React at 150 DEG C～400 DEG C
A kind of technology, reaction temperature be less than 200 DEG C when be commonly referred to as low temperature catalyst.The arrangement of SCR device has three kinds：It is high
The low dirt of Wen Gaochen, high temperature, the low dirt of low temperature, high-temperature high dust is that SCR device is arranged in into boiler rear, is arranged so as to the presence of catalyst
The problem for being easily blocked and wearing and tearing；The low dirt of high temperature is that dust arrester was arranged before SCR device, into the flue gas of SCR device
Dust-laden is low, catalyst long service life, but is the increase in dust arrester, and the resistance that can cause flue gas of refuse burning system increases,
And the investment of high-temperature dust removal is very big；The low dirt of low temperature is that SCR device is arranged in after sack cleaner, and flue-gas temperature herein exists
120～180 DEG C.Because alkali metal content is too high in flue gas of refuse burning dust, the high temperature for being not suitable for being arranged using high dirt is urged
Agent, therefore in the world use is arranged in the low temperature catalyst after cloth bag more.
Existing equal Flow Technique is directed to high temperature catalyst mostly, and for low temperature catalyst, is particularly suitable for waste incineration
The catalytic reactor entry design of power plant is fewer.Low temperature catalyst is generally trilobes granule, using modularized design, tool
Have air speed than it is high the characteristics of, its reactor is different from general catalytic reactor designs.This programme is directed to low temperature catalyst characteristic, if
A kind of flue gas flow equalizing system of suitable low-temperature SCR flue gas denitration reactor is counted, to meet the use of low-temperature catalyzed technology.
Utility model content
A series of concept of reduced forms is introduced in utility model content part, this will be in specific embodiment part
Middle further description.Utility model content part of the present utility model is not meant to attempt to limit claimed
Technical scheme key feature and essential features, more do not mean that the guarantor for attempting to determine technical scheme required for protection
Shield scope.
This utility model is directed to low temperature catalyst characteristic, devises a kind of cigarette of suitable low-temperature SCR flue gas denitration reactor
Gas current-equalizing system so that flue gas improves catalyst reaction efficiency and catalyst utilization evenly into reactor, while just
In system overhaul and catalyst change.
This utility model provides a kind of flue gas flow equalizing system of low-temperature SCR flue gas denitration reactor, the flue gas flow equalizing
System includes warehouse, the guiding device positioned at the warehouse porch and the fairing positioned at the warehouse exit.
Alternatively, the warehouse is the integrated design with guiding device and fairing.
Alternatively, the warehouse facade shape is triangle, and top blind flange has angle with horizontal plane, and the angle is 18-
20 degree.
Alternatively, the warehouse is variable cross-section warehouse, and the variable cross-section warehouse changes the sectional area and stream of flue gas fluid
To.
Alternatively, the guiding device includes deflector.
Alternatively, the deflector be located at warehouse outside part and plane-parallel, the part inside warehouse with
Top blind flange is parallel.
Alternatively, the spacing distance between deflector is 300-500mm.
Alternatively, the fairing includes flow straightening grid.
Alternatively, the flow straightening grid is spliced by several pectination rectification units, the comb of the pectination rectification unit
Between gap distance be 100-120nm, the depth in the gap is the half of the pectination rectification unit width.
Alternatively, the flue gas flow equalizing system is connected with lower catalytic agent system activity.
The flue gas flow equalizing system of the low-temperature SCR flue gas denitration reactor provided according to this utility model, including warehouse, be located at
The guiding device of the warehouse porch and the fairing positioned at the warehouse exit.The flue gas flow equalizing system is according to rubbish
Burn power plant process characteristics design, it is adaptable to which low-temperature SCR flue gas denitration catalyst reacts, improve catalyst reaction efficiency with catalysis
Agent utilization rate；The flue gas flow equalizing overall system architecture is designed using CFD simulations, and satisfaction flows demand；The flue gas flow equalizing system
Each part design of uniting is simple, is easy to manufacture to install；The integrated dismountable design of the flue gas flow equalizing system, easy access is safeguarded
And more catalyst changeout.
Description of the drawings
Drawings below of the present utility model is used to understand this utility model in this as a part of the present utility model.Accompanying drawing
In show embodiment of the present utility model and its description, for explaining device of the present utility model and principle.In the accompanying drawings,
Fig. 1 is the structural representation of this utility model low-temperature SCR flue gas denitration reactor.
Fig. 2 is the structural representation of the flue gas flow equalizing system of this utility model low-temperature SCR flue gas denitration reactor；
Fig. 3 is the structural representation of this utility model warehouse；
Fig. 4 is the structural representation of this utility model guiding device.
Fig. 5 is the structural representation of this utility model fairing.
Accompanying drawing is identified
1st, warehouse 2, guiding device 3, fairing
Specific embodiment
In the following description, a large amount of concrete details are given this utility model is more thoroughly managed to provide
Solution.It will be apparent, however, to one skilled in the art that this utility model can be without the need for one or more of these thin
Save and be carried out.In other examples, in order to avoid obscuring with this utility model, for more well known in the art
Technical characteristic is not described.
Can produce containing NO in Refuse Incineration Processx、SO2, the harmful substance such as HCl flue gas, needs enter to the flue gas
Row process, it is up to standard after can discharge.NOxProcessing mode mainly has：SNCR method (SNCR) and selective catalysis
Reducing process (SCR).SCR denitration is under conditions of catalyst is present so that NOxWith reducing agent NH3In 150 DEG C～400 DEG C generations
A kind of technology of reaction, reaction temperature is commonly referred to as low temperature catalyst when being less than 200 DEG C.
SCR denitration system mainly includes：Reactant storage module, reactant evaporation module, injection mixing module, reactor
Module, automatic control module etc..Wherein reactor module includes exhaust gases passes and antigravity system, as shown in Figure 1.Reactor
Module is the device that denitration reaction occurs, and mixed flue gas flows through catalyst surface and reacts with reaction gas.Flue gas is by cigarette
Road enters catalyst can be occurred to flow to the process changed with sectional area change, easily cause the uneven of flow of flue gas.Therefore, need
Design suitable flue gas flow equalizing system.
Existing equal Flow Technique is directed to high temperature catalyst mostly, and for low temperature catalyst, is particularly suitable for waste incineration
The catalytic reactor entry design of power plant is fewer.Low temperature catalyst is generally trilobes granule, using modularized design, tool
Have air speed than it is high the characteristics of, its reactor is different from general catalytic reactor designs.This programme is directed to low temperature catalyst characteristic, if
A kind of flue gas flow equalizing system of suitable low-temperature SCR flue gas denitration reactor is counted, to meet the use of low-temperature catalyzed technology.
For the problems referred to above, this utility model provides a kind of flue gas flow equalizing system of low-temperature SCR flue gas denitration reactor,
The flue gas flow equalizing system includes warehouse, the guiding device positioned at the warehouse porch and positioned at the whole of the warehouse exit
Stream device.
Wherein, the warehouse facade shape is triangle, and top blind flange has angle with horizontal plane, and the angle is 18-20
Degree；The warehouse is variable cross-section warehouse, and the variable cross-section warehouse changes the sectional area and flow direction of flue gas fluid；The water conservancy diversion dress
Put including deflector, the deflector is located at part and plane-parallel, the part inside warehouse and top outside warehouse
Portion's cover plate is parallel, and the spacing distance between deflector is 300-500mm；The fairing includes flow straightening grid, the rectification
Grid is spliced by several pectination rectification units, and the distance of the comb inter-lobe clearance of the pectination rectification unit is 100-120nm,
The depth in the gap is the half of the pectination rectification unit width；The warehouse is integrated with guiding device and fairing
Change design, be connected with lower catalytic agent system activity.
The flue gas flow equalizing system of the low-temperature SCR flue gas denitration reactor provided according to this utility model, including warehouse, be located at
The guiding device of the warehouse porch and the fairing positioned at the warehouse exit.The flue gas flow equalizing system is according to rubbish
Burn power plant process characteristics design, it is adaptable to which low-temperature SCR flue gas denitration catalyst reacts, improve catalyst reaction efficiency with catalysis
Agent utilization rate；The flue gas flow equalizing overall system architecture is designed using CFD simulations, and satisfaction flows demand；The flue gas flow equalizing system
Each part design of uniting is simple, is easy to manufacture to install；The integrated dismountable design of the flue gas flow equalizing system, easy access is safeguarded
And more catalyst changeout.
[embodiment one]
This utility model is directed to the deficiencies in the prior art, devises a kind of flue gas of low-temperature SCR flue gas denitration reactor equal
Streaming system, is described further below in conjunction with the accompanying drawings to methods described.
First, as shown in Fig. 2 the flue gas flow equalizing system is including warehouse 1, positioned at the guiding device 2 of the warehouse porch
With the fairing 3 positioned at the warehouse exit.
With reference to Fig. 3, the warehouse facade shape is triangle, and top blind flange has angle with horizontal plane, and the angle is 18-
20 degree；The warehouse is variable cross-section warehouse, changes the flow direction that flue gas fluid cross-section is accumulated and changes flue gas.In the present embodiment
In, flue gas is expanded Jing after variable cross-section warehouse by flue and changes flow direction and enters antigravity system after being thoroughly mixed with ammonia.
With reference to Fig. 4, the effect of guiding device is the flow direction for changing flue gas, and the guiding device is in the porch of warehouse, institute
Guiding device is stated for deflector, part and plane-parallel of the deflector outside warehouse, the portion inside warehouse
Divide parallel with top blind flange, the spacing distance between deflector is 300-500mm.In the present embodiment, flue gas Jing deflectors draw
Stream changes direction, in even transition to warehouse, antigravity system is flowed to further downward, it is to avoid flue gas is gathered on warehouse
Portion.As shown in Figure 4, D1 spaced apart is 300-500mm to the size design of deflector between deflector, and D2 is typically negated should
1/40 or so of device cross-sectional length, it is 70-72 ° that deflector is located at the part inside warehouse with the angle α 1 of storehouse body sidewall.
With reference to Fig. 5, the effect of fairing is to be more uniformly distributed flue gas stream, outlet of the fairing in warehouse
Place, the fairing is flow straightening grid, and the flow straightening grid is spliced by several pectination rectification units, the pectination rectification
The distance of the comb inter-lobe clearance of unit is 100-120nm, and the depth in the gap is the half of the pectination rectification unit width.
In the present embodiment, flow straightening grid is square block design, is spliced by several pectination rectification units, and its size design is such as
Shown in Fig. 5, space D 4 is 100-120mm between the comb of the pectination rectification unit, and the width D 3 of the pectination rectification unit is
200-500mm, depth D5 in the gap is 1/2D3.
The flue gas flow equalizing system is the integrated design.Flue gas enters warehouse by flue, by deflector even flow field
Change, before contacting with catalyst, by grid, further uniform flow field.The flue gas flow equalizing system and lower catalytic agent system
Be flexibly connected, integral disassembly, assembly can be carried out, be easy to equipment repair and maintenance and catalyst change, at the same be easy to the deashing of flow straightening grid with
Maintenance.
The flue gas flow equalizing system of the low-temperature SCR flue gas denitration reactor provided according to this utility model, including positioned at described
The guiding device of warehouse porch and the fairing positioned at the warehouse exit.The flue gas flow equalizing system is according to waste incineration
Power plant process characteristics design, it is adaptable to which low-temperature SCR flue gas denitration catalyst reacts, and improves catalyst reaction efficiency and catalyst
Utilization rate；The flue gas flow equalizing overall system architecture is designed using CFD simulations, and satisfaction flows demand；The flue gas flow equalizing system
Each part design is simple, is easy to manufacture to install；The integrated dismountable design of the flue gas flow equalizing system, easy access safeguard and
More catalyst changeout.
This utility model is illustrated by above-described embodiment, but it is to be understood that, above-described embodiment is
For citing and descriptive purpose, and it is not intended to that this utility model is limited in described scope of embodiments.In addition ability
Field technique personnel it is understood that this utility model is not limited to above-described embodiment, according to teaching of the present utility model also
More kinds of variants and modifications can be made, these variants and modifications all fall within this utility model scope required for protection with
It is interior.Protection domain of the present utility model is defined by the appended claims and its equivalent scope.
Claims (10)
1. a kind of flue gas flow equalizing system of low-temperature SCR flue gas denitration reactor, it is characterised in that the flue gas flow equalizing system includes
Warehouse, the guiding device positioned at the warehouse porch and the fairing positioned at the warehouse exit.
2. flue gas flow equalizing system as claimed in claim 1, it is characterised in that the warehouse is with guiding device and fairing
Integrated design.
3. flue gas flow equalizing system as claimed in claim 1, it is characterised in that the warehouse facade shape is triangle, top
Cover plate has angle with horizontal plane, and the angle is 18-20 degree.
4. flue gas flow equalizing system as claimed in claim 1, it is characterised in that the warehouse is variable cross-section warehouse, the change cuts
Face warehouse changes the sectional area and flow direction of flue gas fluid.
5. flue gas flow equalizing system as claimed in claim 1, it is characterised in that the guiding device includes deflector.
6. flue gas flow equalizing system as claimed in claim 5, it is characterised in that the deflector be located at the part outside warehouse with
Plane-parallel, the part inside warehouse is parallel with top blind flange.
7. flue gas flow equalizing system as claimed in claim 6, it is characterised in that the spacing distance between deflector is 300-
500mm。
8. flue gas flow equalizing system as claimed in claim 1, it is characterised in that the fairing includes flow straightening grid.
9. flue gas flow equalizing system as claimed in claim 8, it is characterised in that the flow straightening grid is by several pectination rectification units
It is spliced, the distance of the comb inter-lobe clearance of the pectination rectification unit is 100-120nm, and the depth in the gap is the comb
The half of shape rectification unit width.
10. flue gas flow equalizing system as claimed in claim 1, it is characterised in that the flue gas flow equalizing system and lower catalytic agent
System activity connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621037815.8U CN206082181U (en) | 2016-09-05 | 2016-09-05 | Flue gas system of flow equalizing of low temperature SCR flue gas denitration reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621037815.8U CN206082181U (en) | 2016-09-05 | 2016-09-05 | Flue gas system of flow equalizing of low temperature SCR flue gas denitration reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206082181U true CN206082181U (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621037815.8U Active CN206082181U (en) | 2016-09-05 | 2016-09-05 | Flue gas system of flow equalizing of low temperature SCR flue gas denitration reactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108295657A (en) * | 2018-04-11 | 2018-07-20 | 江苏垦乐节能环保科技有限公司 | A kind of warehouse separated type denitrated reactor of low temperature and denitration method for flue gas |
| CN110755975A (en) * | 2019-10-15 | 2020-02-07 | 光大环保技术装备（常州）有限公司 | Double-layer filtering type bag-type dust collector |
| CN111773922A (en) * | 2020-07-10 | 2020-10-16 | 安徽海螺建材设计研究院有限责任公司 | Safe maintenance operation method for SCR flue gas denitration system |
| CN113566225A (en) * | 2021-07-20 | 2021-10-29 | 西安热工研究院有限公司 | SCR denitrification facility's flue gas velocity of flow adjustment structure |
-
2016
- 2016-09-05 CN CN201621037815.8U patent/CN206082181U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108295657A (en) * | 2018-04-11 | 2018-07-20 | 江苏垦乐节能环保科技有限公司 | A kind of warehouse separated type denitrated reactor of low temperature and denitration method for flue gas |
| CN110755975A (en) * | 2019-10-15 | 2020-02-07 | 光大环保技术装备（常州）有限公司 | Double-layer filtering type bag-type dust collector |
| CN111773922A (en) * | 2020-07-10 | 2020-10-16 | 安徽海螺建材设计研究院有限责任公司 | Safe maintenance operation method for SCR flue gas denitration system |
| CN113566225A (en) * | 2021-07-20 | 2021-10-29 | 西安热工研究院有限公司 | SCR denitrification facility's flue gas velocity of flow adjustment structure |
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