CN206996271U - A kind of device for realizing the multistage spray ammonia of SCR denitrating flue gas - Google Patents
A kind of device for realizing the multistage spray ammonia of SCR denitrating flue gas Download PDFInfo
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- CN206996271U CN206996271U CN201720577357.5U CN201720577357U CN206996271U CN 206996271 U CN206996271 U CN 206996271U CN 201720577357 U CN201720577357 U CN 201720577357U CN 206996271 U CN206996271 U CN 206996271U
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- flue gas
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Abstract
The utility model discloses a kind of device for realizing the multistage spray ammonia of SCR denitrating flue gas, device includes reactor body, reactor body includes the first vertical section, horizontal connection section and the second vertical section successively by flow of flue gas direction, smoke inlet pipelines are provided with before first vertical section, catalyst provided with multiple-layer horizontal arrangement in second vertical section, exhanst gas outlet pipeline is provided with after second vertical section, the first order is provided with first vertical section and mixes equal distribution system, being provided with the second level in the second vertical section mixes equal distribution system；The first order, which mixes equal distribution system, includes the spray ammonia pipe in vortex mixer and multiple nozzle faces the vortex mixer standing vortex area；The second level mixes equal distribution system above catalyst, including multiple concordant, high-pressure spray guns for being oppositely disposed on the second vertical section antetheca and rear wall, high-pressure spray gun use conical porous nozzle.The utility model can effectively solve the problems, such as concentration deviation of the ammonia in reactor depth fore-and-aft direction.
Description
Technical field
The utility model belongs to power station environmental technology field, is related to discharged from coal-fired boiler pollutant catabolic gene method and its dress
Put, and in particular to a kind of device and denitration method for flue gas for realizing the multistage spray ammonia of SCR denitrating flue gas.
Background technology
NOx main components in coal-fired power station boiler flue gas are NO and NO2, wherein NO accounts for 90%, NO2Growing amount according to
Burning condition difference accounts for the 5%~10% of total discharge NOx, and remaining composition is mainly N2O.In China's discharged nitrous oxides total amount
70% comes from the direct burning of coal, and power industry is the coal-fired rich and influential family in China, therefore carries out atmospheric environment NOx controls
Very urgent with control, the NOx controls of coal-burning power plant are the most important things.In January, 2010, China national Chinese Ministry of Environmental Protection works out
《Thermal power plant's nitrogen oxides technological policy for treatment》(ring send out [2010] No. 10 2010-01-27 implement), clear stipulaties NOx controls
The selection principle of technology is, it is specified that low-NO_x combustion technology is the first choice of coal-burning power plant's nitrogen oxides control, using low nitrogen burning
The boiler of technology, if discharged nitrous oxides concentration does not reach emission request still, it is considered as building flue gas denitrification equipment.
At present, the main selective catalysis reduction SelectiveCatal of the denitration method for flue gas on coal-burning boiler is applied
Ytic Reduction (SCR) methods and SNCR SelectiveNon-CatalyticReduction (SNCR)
Method and the coupling method of denitration (SNCR-SCR) that both combine.SCR denitration can divide according to the difference of reactor installation site
Ash (Low-Dust) of arranging and fly at low altitude for high flying dust (High-Dust) arranges two ways.High flying dust arrangement is by SCR
Reactor is arranged between economizer and air preheater, without dedusting.Here flue-gas temperature is 300~400 DEG C, in absolutely mostly
Number high activity of catalyst section, it is not necessary to reheated to flue gas, therefore most of thermal power plant takes high flying dust arrangement.In Europe
Continent and Japan have more than 300 sets of SCR devices, the U.S.'s also major technique using SCR technology as power-plant flue gas denitration, in recent years I
State also largely begins to take on SCR technology removing NOx, especially more than 300MW Large-scale machine sets, is substantially all from SCR denitration skill
Art.SCR denitration technology during practical engineering application, how to ensure spray into reactor in ammonia distributing homogeneity and how
The problem of mixability of enhancing ammonia and flue gas is a urgent need further investigation.Ammonia skewness can produce many problems,
For example the risk that the excessive increase air preheater of the escaping of ammonia blocks, ammonia skewness cause denitration efficiency low, reducing agent waste etc. is asked
Topic.
Publication No. is that CN106166444A patent of invention discloses a kind of classification spray ammonia equipment for denitrifying flue gas and method, should
The purpose of invention is to arrange one layer of spray ammonia system in economizer exit, and the spray ammonia system after coordinating forms classification spray ammonia, sublevel
For section by NOx removal, first order denitrification apparatus that the invention uses includes first layer catalyst layer and first order ammonia-spraying grid, and first
Level catalyst layer is arranged at after first layer ammonia-spraying grid；Second level denitrification apparatus is arranged at after first order denitrification apparatus, with
First order denitrification apparatus connects, including second level catalyst layer and second level ammonia-spraying grid, and second level catalyst layer is arranged at the
After two level ammonia-spraying grid.Patent first order spray ammonia system requirement is installed in economizer exit ash bucket upstream vertical flue to be catalyzed
Agent, second level ammonia-spraying grid are located at the vertical flue of SCR reactors, and this method can't resolve reducing agent in reactor depth front and back
To concentration difference problem.The patent of invention that publication No. is CN106178949A discloses a kind of efficient SCR denitration dress of stepped mixing
Put, second level blender is installed in the invention between SCR first layers catalyst and second layer catalyst, is coordinated above ammonia-spraying grid
First order blender formed stepped mixing.Ammonia-spraying grid is still located at the vertical flue of SCR reactors, and second level blender is
Ammonia and flue gas mixing uniformity passively are increased by rectified action to flue gas and reducing agent, it is impossible to it is deep in reactor to solve reducing agent
The problem of spending the concentration deviation of fore-and-aft direction.The SCR denitration method or spray ammonia method that prior art provides all are research reduction
Agent ammonia fails to propose effectively solve reducing agent ammonia before and after reactor depth in the sex chromosome mosaicism that is evenly distributed in reactor level direction
The problem of concentration deviation in direction.
To sum up analysis is understood, for reducing agent ammonia the concentration deviation of SCR denitration reactor depth fore-and-aft direction the problem of,
Existing some solutions and method have some limitations, and can not fundamentally solve the problem in application process.
How on the basis of reducing agent dosage is not increased, effectively solve concentration deviation of the reducing agent in reactor depth fore-and-aft direction
Problem, it is to realize to improve SCR denitration efficiency to improve reducing agent distributing homogeneity, reduces the basic principle of the escaping of ammonia rate.
The content of the invention
For overcome the deficiencies in the prior art, the purpose of the utility model first is that reducing agent can effectively be solved by providing one kind
Ammonia is the SCR denitration reactor depth fore-and-aft direction concentration deviation the problem of；The purpose of the utility model second is that providing one kind adopts
The method for carrying out denitration to flue gas with the SCR denitration reactor.
Above-mentioned purpose is achieved by the following technical solution：
One kind classification spray ammonia SCR flue gas denitration reactors, including reactor body, reactor body press flow of flue gas direction
Include the first vertical section, horizontal connection section and the second vertical section successively, be provided with smoke inlet pipelines before the first vertical section, second
Catalyst provided with multiple-layer horizontal arrangement in vertical section, is provided with exhanst gas outlet pipeline after the second vertical section, in the first vertical section
Equal distribution system is mixed provided with the first order, being provided with the second level in the second vertical section mixes equal distribution system；The first order mixing is uniform
System includes the spray ammonia pipe in vortex mixer and multiple nozzle faces the vortex mixer standing vortex area；The second level mixing is uniform
System is above the catalyst, including multiple concordant, high-pressure spray guns for being oppositely disposed on the second vertical section antetheca and rear wall, high
Pressure spray gun uses conical porous nozzle.By the way of ammonia is sprayed in classification, especially in SCR denitration reactor first layer catalyst
Top reactor front and rear wall arrangement, which mends ammonia spray gun, can effectively solve asking for concentration deviation of the ammonia in reactor depth fore-and-aft direction
Topic.
Preferably, the range for being arranged in the second vertical section antetheca and the high-pressure spray gun on rear wall is 1.5-2m.Reducing agent ammonia
It is concentrated mainly in the concentration deviation region of reactor depth fore-and-aft direction apart from reactor front and rear wall 0.5-1.5m depth directions,
Need to ensure only having the reducing agent that 2-3 rice position penetrating range is 1.5-2m apart from catalyst, ensure that reducing agent mixes with flue gas
Close.The second level mixes equal distribution system and the ammonia after dilution is injected into reactor, range 1.5-2m, level side by high-pressure spray gun
To covering about 1.5-2.5 rice, by spraying, ammonia fluidic vectoring thrust penetration power and flue gas are full and uniform to be mixed.
Preferably, each spray ammonia pipe corresponds to and connects a defeated ammonia branch pipe respectively with each high-pressure spray gun, and each defeated ammonia branch pipe connects
Pass to same ammonia source.How on the basis of reducing agent dosage is not increased, effectively solves reducing agent in reactor depth front and back
To concentration deviation the problem of, improve reducing agent distributing homogeneity be realize improve SCR denitration efficiency, reduce the escaping of ammonia rate base
This principle.The utility model is only uniform by changing the i.e. achievable spray ammonia of distribution of the reducing agent ammonia between two-stage spray ammonia system, no
Increase reducing agent dosage, finally improve the denitration efficiency of the utility model flue gas denitrification system, reduce the escaping of ammonia rate.
Preferably, every defeated ammonia branch pipe is sequentially provided with upstream pressure table, stop valve, regulating valve and valve by ammonia flow direction
Pressure gauge afterwards.In running, defeated ammonia branch pipe easily blocks, and lacks at present in engineer applied directly perceived effectively in equipment operation
It is middle to judge defeated ammonia branch pipe blockage problem.Manual modulation valve and each one of stop valve are set on every defeated ammonia branch pipe, and valve is forward and backward
Install pressure gauge additional, can judge whether corresponding spray ammonia pipeline blocks by pressure gauge before defeated ammonia branch pipe upper valve and downstream pressure table.And
, can basis when system puts into operation and the spray ammonia pipe of the equal distribution system of first order mixing sets regulating valve before vortex mixer is injected
The flue NOx concentration that detects of inlet and outlet adjusts the sendout of ammonia, and regulation can adjust no longer substantially after terminating.The second level mixes
The defeated ammonia branch pipe of spray gun of equal distribution system sets regulating valve and each one of stop valve, and valve is front and rear to be equipped with pressure gauge, can be according to survey
Examination situation chooses whether that enabling the second level mixes equal distribution system, also can according to circumstances adjust the benefit ammonia that the second level mixes equal distribution system
Amount.
Preferably, the first order mixes equal distribution system and is provided with four spray ammonia pipes.
Preferably, the second level mixes equal distribution system and is provided with six high-pressure spray guns, antetheca and each three of rear wall.
Preferably, the corner that first vertical section connects with horizontal connection section is provided with corner deflector.
Preferably, horizontal smoke inlet pipelines, the first vertical section and hori-zontal flue gas entrance are provided with before the first vertical section
The corner of pipeline connection is provided with corner deflector.
Preferably, the catalyst provided with three levels arrangement in the second vertical section.
A kind of method for carrying out denitration to flue gas using above-mentioned Benitration reactor：It is using high dirt arrangement, denitration is anti-
Answer device be arranged in economizer after, before air preheater, the flue gas that the flue gas that is come out from economizer enters Benitration reactor enters
Mouthful pipeline, afterwards flue gas enter the vertical section of Benitration reactor first, be redirected into the second vertical section through horizontal connection section after drawing high,
The ammonia of NOx and penetrating in flue gas generate nitrogen through multi-layer catalyst catalytic reaction and water, reacted neat stress pass through denitration
The exhanst gas outlet pipeline air inlet preheater of reactor.
The second level mixes equal distribution system and is arranged in reactor front and rear wall above SCR denitration reactor first layer catalyst, adopts
With jet mixing technology, the ammonia after dilution is injected by reactor by high-pressure spray gun, the ammonia and flue gas of penetrating further mix
Close, coordinate the first order to mix the vortex mixing technology of equal distribution system, realize the full and uniform mixing of flue gas and ammonia.
The beneficial effects of the utility model：
1st, the utility model Benitration reactor is by the way of ammonia is sprayed in classification, especially in SCR denitration reactor first layer
It is inclined in the concentration of reactor depth fore-and-aft direction can effectively to solve ammonia for reactor front and rear wall arrangement benefit ammonia spray gun above catalyst
The problem of poor；
2nd, the utility model first order and the second level mix equal distribution system and are communicated to same ammonia source (ammonia-air Mixture
Body), do not change former reductant supply system, can be applicable to the denitrating system of urea pyrolysis ammonia or liquefied ammonia as reducing agent；And
And the utility model is only uniform by changing the i.e. achievable spray ammonia of distribution of the reducing agent ammonia between two-stage spray ammonia system, does not increase
Reducing agent dosage, the denitration efficiency of the utility model flue gas denitrification system is finally improved, reduce the escaping of ammonia rate；
3rd, the increased second level of the utility model mixes equal distribution system and is arranged on reactor front and rear wall, here structure letter
It is single, secure context will not be caused to influence boiler normal operation, the transformation cycle is short, is easy in existing conventional scr denitration engineering
On the basis of be transformed into flue gas denitrification system described in the utility model；
4th, the SCR denitration rate of the utility model flue gas denitration reactor and method is high, catalyst inlet flue gas and reducing agent
Distributing homogeneity is higher than traditional SCR denitration system, suitable for big-and-middle-sized station boiler SCR denitration system, has wide application
Prospect.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model device, and wherein B is A left view；
Fig. 2 be defeated ammonia manifold configuration schematic diagram and with first, second grade of annexation figure for mixing equal distribution system；
Wherein, 1 is reactor body, and 2 be the first vertical section, and 3 be horizontal connection section, and 4 be the second vertical section, and 5 be flue gas
Inlet duct, 6 be exhanst gas outlet pipeline, and 7 be catalyst, and 8 be corner deflector, and 9 be vortex mixer, and 10 be to spray ammonia pipe, 11
It is defeated ammonia branch pipe for high-pressure spray gun, 12,13 be upstream pressure table, and 14 be stop valve, and 15 be regulating valve, and 16 be downstream pressure table,
17 be corner deflector.
Embodiment
The technical solution of the utility model is specifically introduced below in conjunction with the accompanying drawings.
A kind of classification spray ammonia SCR flue gas denitration reactors as illustrated in fig. 1 and 2, including reactor body 1, reactor sheet
Body 1 includes the first vertical section 2, the vertical section 4 of horizontal connection section 3 and second successively by flow of flue gas direction, before the first vertical section 2
Provided with horizontal smoke inlet pipelines 5, the catalyst 7 provided with three levels arrangement in the second vertical section 4, the second vertical section 4 it
Exhanst gas outlet pipeline 6 is provided with afterwards, and the first order is provided with the first vertical section 2 and mixes equal distribution system, second is provided with the second vertical section 4
Level mixes equal distribution system.The corner that first vertical section 2 and horizontal connection section 3 connect is provided with corner deflector 17, and first is vertical
The corner that section 2 and hori-zontal flue gas inlet duct 5 connect is provided with corner deflector 8.The first order, which mixes equal distribution system, includes vortex
Blender 9 and the spray ammonia pipe 10 in four nozzle face vortex mixer standing vortex areas.The second level mixes equal distribution system located at catalysis
The top of agent 7, including six high-pressure spray guns 11 that are concordant, being oppositely disposed on the antetheca of the second vertical section 4 and rear wall, antetheca and rear wall
Each three, high-pressure spray gun 11 uses conical porous nozzle, range 1.5-2m.Each spray ammonia pipe 10 and each high-pressure spray gun 11
A piece defeated ammonia branch pipe 12 of connection is corresponded to respectively, and each defeated ammonia branch pipe 12 is communicated to same ammonia source.Every defeated ammonia branch pipe 12 presses ammonia flow
Dynamic direction is sequentially provided with upstream pressure table 13, stop valve 14, regulating valve 15 and downstream pressure table 16.Using the side of classification spray ammonia
Formula, reactor front and rear wall arrangement is mended ammonia spray gun and can effectively solved especially above SCR denitration reactor first layer catalyst
Ammonia is the concentration deviation of reactor depth direction front and rear wall the problem of.Reducing agent ammonia is inclined in the concentration of reactor depth fore-and-aft direction
Poor region is concentrated mainly on apart from reactor front and rear wall 0.5-1.5m depth directions, it is necessary to ensure only having 2-3 apart from catalyst
Rice position sprays into the reducing agent that range is 1.5-2m, ensures that reducing agent mixes with flue gas.The second level mixes equal distribution system and passes through height
Press spray gun that the ammonia after dilution is injected into reactor, range 1.5-2m, horizontal direction covering about 1.5-2.5 rice, by spraying ammonia
Fluidic vectoring thrust penetration power with flue gas is full and uniform mixes.How on the basis of reducing agent dosage is not increased, effectively solves reduction
The concentration deviation of reactor depth fore-and-aft direction the problem of, it is to realize to improve SCR denitration to improve reducing agent distributing homogeneity for agent
Efficiency, reduce the basic principle of the escaping of ammonia rate.The utility model is only by changing point of the reducing agent ammonia between two-stage sprays ammonia system
With can be achieved, spray ammonia is uniform, does not increase reducing agent dosage, finally improves the denitration effect of the utility model flue gas denitrification system
Rate, reduce the escaping of ammonia rate.
In running, defeated ammonia branch pipe easily blocks, and lacks at present in engineer applied directly perceived effectively in equipment operation
It is middle to judge defeated ammonia branch pipe blockage problem.Manual modulation valve and each one of stop valve are set on every defeated ammonia branch pipe, and valve is forward and backward
Install pressure gauge additional, can judge whether corresponding spray ammonia pipeline blocks by pressure gauge before defeated ammonia branch pipe upper valve and downstream pressure table.And
, can basis when system puts into operation and the spray ammonia pipe of the equal distribution system of first order mixing sets regulating valve before vortex mixer is injected
The flue NOx concentration that detects of inlet and outlet adjusts the sendout of ammonia, and regulation can adjust no longer substantially after terminating.The second level mixes
The defeated ammonia branch pipe of spray gun of equal distribution system sets regulating valve and each one of stop valve, and valve is front and rear to be equipped with pressure gauge, can be according to survey
Examination situation chooses whether that enabling the second level mixes equal distribution system, also can according to circumstances adjust the benefit ammonia that the second level mixes equal distribution system
Amount.
A kind of method for carrying out denitration to flue gas using above-mentioned Benitration reactor：It is using high dirt arrangement, denitration is anti-
Answer device be arranged in economizer after, before air preheater, the flue gas that the flue gas that is come out from economizer enters Benitration reactor enters
Mouthful pipeline, afterwards flue gas enter the vertical section of Benitration reactor first, be redirected into the second vertical section through horizontal connection section after drawing high,
The ammonia of NOx and penetrating in flue gas generate nitrogen through multi-layer catalyst catalytic reaction and water, reacted neat stress pass through denitration
The exhanst gas outlet pipeline air inlet preheater of reactor.
The second level mixes equal distribution system and is arranged in reactor front and rear wall above SCR denitration reactor first layer catalyst, adopts
With jet mixing technology, the ammonia after dilution is injected by reactor by high-pressure spray gun, the ammonia and flue gas of penetrating further mix
Close, coordinate the first order to mix the vortex mixing technology of equal distribution system, realize the full and uniform mixing of flue gas and ammonia.
Operation principle：
During denitrating flue gas, into SCR denitration reactor flue gas in the vertical section of SCR reactors first with from
The ammonia that one-level is mixed in equal distribution system carries out first order mixing, and mixed effect can be by SCR reactor smoke outlet tubes
The measuring point of road horizontal direction measures horizontal direction mixing unevenness, is adjusted by regulating valve on defeated ammonia branch pipe, first order mixing
The stop valve that four spray ammonia pipes are corresponded on defeated ammonia branch pipe in equal distribution system keeps full-gear, passes through upstream pressure on defeated ammonia branch pipe
Table and downstream pressure table can determine whether corresponding spray ammonia pipeline blocks.The first order mixes equal distribution system and is located at SCR reactors first
Vertical section flue, the ammonia sprayed into here turns to when entering catalyst layer together with flue gas in flue, close to corner flue gas
Flow velocity is low, is so easy on the corner dust stratification, and flow of flue gas is formed and disturbed；Again because of the work of the centrifugal force when flue gas turns to
With so that more flue gases and reducing agent ammonia are thrown to the outer side flue of reactor, and the two collective effect causes to enter SCR reactors
In NOx and ammonia skewness, cause NOx and ammonia concentration distribution deviation occur.Therefore, when gas flows to SCR catalyst entrance
When, the reducing agent ammonia of penetrating can not only have the concentration deviation of reactor width left and right directions, before also having reactor depth
Rear to concentration deviation.It can be surveyed by carrying out depth direction NOx and ammonia density measurement in SCR reactor outlet flues measuring point
Go out horizontal direction mixing unevenness, enabling the second level according to measurement result mixes benefit ammonia spray gun in equal distribution system.Will before adjustment
Ammonia spray gun stop valve is mended in the equal distribution system of all second level mixing and regulating valve is fully closed, and mixing equal distribution system according to the first order enables
SCR reactor outlets flue measuring point carries out depth direction NOx and ammonia density measurement result afterwards, and selectively opened second level mixing is equal
Ammonia spray gun is mended in distribution system, is opened from stop valve on the defeated ammonia branch pipe of spray gun, is adjusted according to test data and is adjusted on defeated ammonia branch pipe
Valve, NOx and ammonia are well mixed in ensureing into the flue gas of catalyst.Ammonia SCR denitration system, the utility model are sprayed compared to single-stage
SCR reactor outlet flue gas NOx relative standard's concentration deviation factors can reduce more than 15%, and denitration efficiency improves more than 10%,
The escaping of ammonia absolute concentration and skewness are remarkably decreased that (the escaping of ammonia can be ignored close to zero, greatly protect air pre-
Hot device, also improve reducing agent utilization rate), the utility model only sprays the distribution between ammonia system by changing reducing agent ammonia in two-stage
It is uniform that spray ammonia can be achieved, do not increase reducing agent dosage, it is inclined in the concentration of reactor depth fore-and-aft direction effectively to solve reducing agent
The problem of poor, solves the escaping of ammonia.
It in summary it can be seen：1st, the utility model Benitration reactor is by the way of ammonia is sprayed in classification, especially in SCR denitration
Reactor front and rear wall arrangement, which mends ammonia spray gun, above reactor first layer catalyst can effectively solve ammonia before and after reactor depth
The problem of concentration deviation in direction；2nd, the utility model first order and the second level mix equal distribution system and are communicated to same ammonia source
(ammonia-air gas mixture), does not change former reductant supply system, can be applicable to urea pyrolysis ammonia or liquefied ammonia as reducing agent
Denitrating system；Moreover, the utility model only can be achieved to spray by changing reducing agent ammonia in the distribution that two-stage is sprayed between ammonia system
Ammonia is uniform, does not increase reducing agent dosage, finally improves the denitration efficiency of the utility model flue gas denitrification system, reduces the escaping of ammonia
Rate；3rd, the increased second level of the utility model mixes equal distribution system and is arranged on reactor front and rear wall, simple in construction here, will not
Secure context is caused to influence boiler normal operation, the transformation cycle is short, is easy to change on the basis of existing conventional scr denitration engineering
Cause flue gas denitrification system described in the utility model；4th, the SCR denitration rate of the utility model flue gas denitration reactor and method
Height, catalyst inlet flue gas and reducing agent distributing homogeneity are higher than traditional SCR denitration system, suitable for big-and-middle-sized station boiler
SCR denitration system, have broad application prospects.
The effect of above-described embodiment is only that explanation essentiality content of the present utility model, but does not limit this practicality with this
New protection domain.It will be understood by those within the art that the technical solution of the utility model can be repaiied
Change or equivalent substitution, without departing from the essence and protection domain of technical solutions of the utility model.
Claims (9)
1. a kind of device for realizing the multistage spray ammonia of SCR denitrating flue gas, including reactor body, reactor body press flow of flue gas side
To the first vertical section, horizontal connection section and the second vertical section is included successively, smoke inlet pipelines are provided with before the first vertical section, the
Exhanst gas outlet pipeline, the catalyst arranged in the second vertical section provided with multiple-layer horizontal are provided with after two vertical sections, it is characterised in that：
The first order is provided with first vertical section and mixes equal distribution system, being provided with the second level in the second vertical section mixes equal distribution system；Described
One-level, which mixes equal distribution system, includes the spray ammonia pipe in vortex mixer and multiple nozzle faces the vortex mixer standing vortex area；Described
Two level mixes equal distribution system above catalyst, including it is multiple it is concordant, be oppositely disposed on the second vertical section antetheca and rear wall
High-pressure spray gun, high-pressure spray gun uses conical porous nozzle.
2. device according to claim 1, it is characterised in that：The high pressure spray being arranged on the second vertical section antetheca and rear wall
The range of rifle is 1.5-2m.
3. device according to claim 1, it is characterised in that：Each spray ammonia pipe corresponds to respectively with each high-pressure spray gun to be connected
A piece defeated ammonia branch pipe, each defeated ammonia branch pipe are communicated to same ammonia source.
4. device according to claim 3, it is characterised in that：Every defeated ammonia branch pipe is sequentially provided with valve by ammonia flow direction
Preceding pressure gauge, stop valve, regulating valve and downstream pressure table.
5. the device according to claim 3 or 4, it is characterised in that：The first order mixes equal distribution system and is provided with four sprays
Ammonia pipe.
6. the device according to claim 3 or 4, it is characterised in that：The second level mixes equal distribution system and is provided with six height
Press spray gun, antetheca and each three of rear wall.
7. device according to claim 1, it is characterised in that：The turning that first vertical section connects with horizontal connection section
Place is provided with corner deflector.
8. device according to claim 1, it is characterised in that：Horizontal smoke inlet pipe is provided with before first vertical section
The corner that road, the first vertical section and hori-zontal flue gas inlet duct connect is provided with corner deflector.
9. device according to claim 1, it is characterised in that：Catalysis provided with three levels arrangement in second vertical section
Agent.
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| CN201720577357.5U CN206996271U (en) | 2017-05-23 | 2017-05-23 | A kind of device for realizing the multistage spray ammonia of SCR denitrating flue gas |
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| CN201720577357.5U CN206996271U (en) | 2017-05-23 | 2017-05-23 | A kind of device for realizing the multistage spray ammonia of SCR denitrating flue gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008144A (en) * | 2017-05-23 | 2017-08-04 | 国电科学技术研究院 | A kind of device and denitration method for flue gas for realizing SCR denitrating flue gas multistage spray ammonia |
| CN110743339A (en) * | 2019-11-11 | 2020-02-04 | 中国科学院山西煤炭化学研究所 | Flue gas pollutant purification device and method |
| TWI707719B (en) * | 2019-02-01 | 2020-10-21 | 日商三菱日立電力系統股份有限公司 | Reducing agent supply device and method of operating the reducing agent supply device |
-
2017
- 2017-05-23 CN CN201720577357.5U patent/CN206996271U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008144A (en) * | 2017-05-23 | 2017-08-04 | 国电科学技术研究院 | A kind of device and denitration method for flue gas for realizing SCR denitrating flue gas multistage spray ammonia |
| TWI707719B (en) * | 2019-02-01 | 2020-10-21 | 日商三菱日立電力系統股份有限公司 | Reducing agent supply device and method of operating the reducing agent supply device |
| CN110743339A (en) * | 2019-11-11 | 2020-02-04 | 中国科学院山西煤炭化学研究所 | Flue gas pollutant purification device and method |
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Address after: 210023 No. 10 Wonderland Road, Qixia District, Nanjing City, Jiangsu Province Co-patentee after: Guodian Nanjing electric power test & Research Co., Ltd. Patentee after: National Electric Science and Technology Research Institute Co., Ltd. Address before: 210023 No. 10 Wonderland Road, Qixia District, Nanjing City, Jiangsu Province Co-patentee before: Nanjing Power Equipment Quality & Performance Test Center Patentee before: Guodian Science and Technology Research Institute |