CN108392959A - A kind of spray ammonia system and its implementation for denitrating flue gas - Google Patents
A kind of spray ammonia system and its implementation for denitrating flue gas Download PDFInfo
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- CN108392959A CN108392959A CN201810128392.8A CN201810128392A CN108392959A CN 108392959 A CN108392959 A CN 108392959A CN 201810128392 A CN201810128392 A CN 201810128392A CN 108392959 A CN108392959 A CN 108392959A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The present invention relates to a kind of spray ammonia systems and its implementation for denitrating flue gas, in a kind of spray ammonia system for denitrating flue gas of the present invention, the cross section of denitration flue mouth is divided into the identical spray ammonia region of multiple areas, a spray ammonia module is respectively set in ammonia flow needed for each spray ammonia region in each spray ammonia region, the ammonia flow sprayed needed for ammonia region is bigger, and nozzle quantity is more possessed by the spray ammonia module in the spray ammonia region；Each spray ammonia module is connected with a spray ammonia branch pipe, control valve there are one being set on every spray ammonia branch pipe, in this way, more ammonia can be sprayed in the larger spray ammonia region of required ammonia flow, less ammonia is sprayed in the smaller spray ammonia region of required ammonia flow, so that the denitration efficiency of each regional area at denitration flue mouth is improved.
Description
Technical field
A kind of spray ammonia system and its implementation for denitrating flue gas of the invention, belongs to a kind of ring for denitrating flue gas
Protect equipment.
Background technology
With the continuous promotion of national requirements for environmental protection, generating set for flue gas denitrification system performance requirement increasingly
It is high.Present demand of the selective catalytic reduction (SCR) to denitration efficiency is often beyond 90%, simultaneously for the escaping of ammonia rate, by
Upstream device operation is influenced in it, also there are many power plant to put forward higher requirements it.
For selective catalytic reduction, denitration efficiency and the escaping of ammonia rate the two performance parameters mainly pass through two aspects
Means are improved：1, catalyst reducing power is improved；2, improve catalyst layer inlet flue gas distribution and NOx/NH3 it is equal
Even property.
Mainly by improving catalyst formulation, the means such as larger catalyst dosage improve catalyst reducing power；And
Catalyst layer inlet flue gas is distributed and NOx/NH3(NOx indicates nitrogen oxides, NH3Indicate ammonia) uniformity be then to pass through optimization
Denitrification apparatus flue deflector, and adjustment ammonia-spraying grid design, come what is realized, wherein ammonia-spraying grid is for denitrification apparatus flue gas
Middle NOx/NH3Uniform distribution influence it is particularly critical.
But as national requirements for environmental protection is continuously improved, flue gas is worked as in the proposition that ultra-clean or even ultra-clean denitrating flue gas requires
When requirement of the denitrification apparatus for denitration efficiency is more than 90%, simple larger catalyst dosage can not further increase effect
Rate, it is necessary to NOx/NH3Uniformity put forward higher requirements, NH3/NOXMolar ratio distribution deviation needs reach ± 3%, even
Smaller.
In face of this high NH3/NOXThe requirement of molar ratio distribution deviation, existing ammonia-spraying grid pattern start to expose its deficiency：
When 1, in face of the big situation of some flue gas flow field deviations, ammonia flow needed for the several injection branch pipes in part is excessive or mistake
It is small, have exceeded adjustable range；Cause the ammonia flow of localized ejection excessive or very few relative to flue gas flow so that denitration efficiency
It is not high.
2, the common shut-off valve that the valve of spray ammonia branch pipe uses, regulation performance is poor, cannot be satisfied degree of regulation requirement.
Invention content
In view of the foregoing deficiencies of prior art, it is de- for flue gas that the technical problem to be solved in the present invention is to provide one kind
The spray ammonia system and its implementation of nitre, can improve denitration efficiency.
To achieve the above object, the present invention provides a kind of spray ammonia system for denitrating flue gas, is set to denitration flue mouth, institute
The cross section for stating denitration flue mouth is divided into the identical spray ammonia region of multiple areas, and each spray ammonia region is determined by calculation out
Flue gas flow and nitrogen oxides flux, and obtained needed for each spray ammonia region according to the size of flue gas flow and nitrogen oxides flux
Ammonia flow；A spray ammonia module is respectively set in ammonia flow needed for each spray ammonia region in each spray ammonia region, sprays ammonia
Ammonia flow needed for region is bigger, and nozzle quantity is more possessed by the spray ammonia module in the spray ammonia region；Each spray ammonia
Module with one spray ammonia branch pipe be connected, every spray ammonia branch pipe on set there are one control valve.
As described above, a kind of spray ammonia system for denitrating flue gas of the present invention, has the advantages that：At this
In a kind of spray ammonia system for denitrating flue gas of invention, it is identical that the cross section of denitration flue mouth is divided into multiple areas
Ammonia region is sprayed, a spray ammonia module is respectively set in the ammonia flow needed for each spray ammonia region in each spray ammonia region, sprays ammonia
Ammonia flow needed for region is bigger, and nozzle quantity is more possessed by the spray ammonia module in the spray ammonia region；Each spray ammonia
Module with one spray ammonia branch pipe be connected, every spray ammonia branch pipe on set there are one control valve, in this manner it is possible in required ammonia flow
More ammonia is sprayed in larger spray ammonia region, sprays less ammonia in the smaller spray ammonia region of required ammonia flow,
So that the denitration efficiency of each regional area at denitration flue mouth is improved.
Preferably, the spray ammonia module includes multiple injection pipe groups, and each injection pipe group includes the first injection pipe, the second spray
Penetrate pipe and third injection pipe；First injection pipe is equipped with the first nozzle group, and the second injection pipe is equipped with the second nozzle group, third spray
It penetrates pipe and is equipped with third nozzle group.First injection pipe, the second injection pipe and third injection pipe are connected on spray ammonia branch pipe, spray ammonia branch
Ammonia in pipe is input in the first injection pipe, the second injection pipe and third injection pipe, and passes through the first nozzle group, the second nozzle
Group, third nozzle group spray.
It is further preferable that the spacing in first nozzle group between two neighboring nozzle is the first spacing, the second nozzle
Spacing in group between two neighboring nozzle is the second spacing, and the spacing in third nozzle group between two neighboring nozzle is third
Spacing, the first spacing, the second spacing and third spacing it is of different sizes.In this way, can be adjacent in the first nozzle group by being arranged
Phase in the second spacing and third nozzle group in the first spacing, the second nozzle group between two nozzles between two neighboring nozzle
Third spacing between adjacent two nozzles make the nozzle density in each regional area in same spray ammonia region different, thus
Fining ground adjusts the flow for the ammonia that each regional area in same spray ammonia region is sprayed so that denitration flue entrance
Ammonia emitted dose is adapted with flue gas flow, improves the denitration efficiency of flue gas.
It is further preferable that the first nozzle group includes multiple first nozzles；Second nozzle group includes multiple second nozzles；Third
Nozzle group includes multiple third nozzles.
Preferably, the nozzle diameter of first nozzle, the nozzle diameter of the second nozzle, the nozzle diameter of third nozzle are each
It differs.In this way, spray that can be larger in the larger regional area setting nozzle diameter of the flue gas flow in same spray ammonia region
Head improves the ammonia flow of the regional area with fining, to improve the denitration efficiency of flue gas.
Preferably, the control valve is cut-off shutoff valve.Ending shutoff valve has special spool, in 60% relative opening degree
Preferable linear relationship is presented with valve relative discharge in 100% relative opening degree region, can be obtained compared to common shut-off valve
With good regulating effect.
Correspondingly with a kind of spray ammonia system for denitrating flue gas of the invention, it is de- for flue gas that the present invention also provides one kind
The implementation of the spray ammonia system of nitre is used for cigarette for implementing described in above-mentioned technical proposal or its any preferred technical solution
The spray ammonia system of qi exhaustion nitre, includes the following steps：
1) cross section of denitration flue mouth is divided into the identical spray ammonia region of multiple areas, each spray is determined by calculation out
The flue gas flow and nitrogen oxides Flux Distribution in ammonia region；
2) ammonia flow needed for each spray ammonia region is obtained according to the size of flue gas flow and nitrogen oxides flux；
3) a spray ammonia module is respectively set in the ammonia flow needed for each spray ammonia region in each spray ammonia region, according to
Ammonia flow needed for each spray ammonia region determines the spray ammonia mould nozzle quantity in the block in the spray ammonia region, sprays needed for ammonia region
Ammonia flow is bigger, and nozzle quantity is more possessed by the spray ammonia module in the spray ammonia region；
4) different spray ammonia modules is connected from different spray ammonia branch pipes, a control valve is set on every spray ammonia branch pipe.
Preferably, in above-mentioned steps 3) in, in the bigger spray ammonia region of required ammonia flow, the spray in the spray ammonia region
The nozzle diameter of ammonia mould nozzle in the block is bigger.
The present invention a kind of spray ammonia system for denitrating flue gas implementation be used for implement above-mentioned technical proposal or its
Certainly also there is the spray ammonia system for denitrating flue gas described in any preferred technical solution one kind of the present invention being used for flue gas
The advantageous effect of the spray ammonia system of denitration, details are not described herein again.
Description of the drawings
Fig. 1 is shown as the division schematic diagram in the spray ammonia region of denitration flue mouth；
Fig. 2 is shown as the vertical view of spray ammonia module；
Fig. 3 is shown as the schematic diagram that the directions A are observed along Fig. 2.
Component label instructions
1 spray ammonia region
2 spray ammonia modules
3 spray ammonia branch pipes
4 injection pipe groups
5 first injection pipes
6 second injection pipes
7 third injection pipes
8 first nozzle groups
9 second nozzle groups
10 third nozzle groups
11 first spacing
12 second spacing
13 third spacing
14 first nozzles
15 second nozzles
16 third nozzles
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this explanations by particular specific embodiment below
Content disclosed by book understands other advantages and effect of the present invention easily.
It should be clear that structure, ratio, size etc. depicted in this specification institute accompanying drawings, only coordinating specification to be taken off
The content shown is not limited to the enforceable qualifications of the present invention so that those skilled in the art understands and reads, therefore
Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the present invention
Under the effect of can be generated and the purpose that can reach, it should all still fall and obtain the model that can cover in disclosed technology contents
In enclosing.Meanwhile in this specification cited such as "upper", "lower", "left", "right", " centre " term, be merely convenient to chat
That states is illustrated, rather than to limit the scope of the invention, relativeness is altered or modified, and skill is being changed without essence
It is held in art, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1 to Figure 3, the present invention provides a kind of spray ammonia system for denitrating flue gas, is set to denitration flue mouth, institute
The cross section for stating denitration flue mouth is divided into the identical spray ammonia region 1 of multiple areas, and each spray ammonia region 1 is determined by calculation out
Flue gas flow, and obtain according to the size of flue gas flow ammonia flow and nitrogen oxides flux needed for each spray ammonia region 1；Root
According to each ammonia flow sprayed needed for ammonia region 1 and nitrogen oxides flux, (nitrogen oxides flux, that is, nitrogen oxides, which passes through, sprays ammonia region 1
Flow) a spray ammonia module 2 is respectively set in each spray ammonia region 1, the ammonia flow needed for spray ammonia region 1 is bigger, the spray
Nozzle quantity is more possessed by spray ammonia module 2 in ammonia region 1；Each spray ammonia module 2 is connected with a spray ammonia branch pipe 3,
Control valve there are one being set on every spray ammonia branch pipe 3.In a kind of spray ammonia system for denitrating flue gas of the present invention, by denitration cigarette
The cross section at road junction is divided into the identical spray ammonia region 1 of multiple areas, and the ammonia flow needed for each spray ammonia region 1 is each
A spray ammonia module 2 is respectively set in spray ammonia region 1, the ammonia flow needed for spray ammonia region 1 is bigger, in the spray ammonia region 1
It is more to spray nozzle quantity possessed by ammonia module 2；Each spray ammonia module 2 is connected with a spray ammonia branch pipe 3, every spray ammonia branch pipe
Control valve there are one being set on 3, in this manner it is possible to more ammonia is sprayed in the larger spray ammonia region 1 of required ammonia flow,
Required ammonia flow sprays less ammonia in smaller spray ammonia region 1, so that each regional area at denitration flue mouth
Denitration efficiency be improved.
As shown in Figure 2 to Figure 3, as a preferred embodiment, the spray ammonia module 2 includes multiple injection pipe groups 4,
Each injection pipe group 4 includes the first injection pipe 5, the second injection pipe 6 and third injection pipe 7；First injection pipe 5 is equipped with the first spray
Head group 8, the second injection pipe 6 are equipped with the second nozzle group 9, and third injection pipe 7 is equipped with third nozzle group 10.First injection pipe 5,
Second injection pipe 6 and third injection pipe 7 are connected on spray ammonia branch pipe 3, the ammonia in spray ammonia branch pipe 3 be input to the first injection pipe 5,
In second injection pipe 6 and third injection pipe 7, and sprayed by the first nozzle group 8, the second nozzle group 9, third nozzle group 10.It is excellent
Selection of land, spray ammonia region 1 are rectangle, and each injection pipe group 4 is layed within spray ammonia region, the first injection pipe 5,6 and of the second injection pipe
Third injection pipe 7 is mutually parallel and is parallel to certain a side in spray ammonia region, in order to enable denitration is more efficient, described first
Spacing in nozzle group 8 between two neighboring nozzle is the first spacing 11, in the second nozzle group 9 between two neighboring nozzle between
Away from for the second spacing 12, the spacing in third nozzle group 10 between two neighboring nozzle is third spacing 13, the first spacing 11, the
Two spacing 12 and third spacing 13 it is of different sizes.In this way, can be by being arranged in the first nozzle group 8 between two neighboring nozzle
The first spacing 11, adjacent two in the second spacing 12 in the second nozzle group 9 between two neighboring nozzle and third nozzle group 10
Third spacing 13 between a nozzle is different to make the nozzle density in each regional area in same spray ammonia region 1, to
Fining ground adjusts the flow for the ammonia that each regional area in same spray ammonia region 1 is sprayed so that denitration flue entrance
Ammonia emitted dose and flue gas flow be adapted, improve the denitration efficiency of flue gas.As shown in Fig. 2, the first nozzle group 8 includes multiple
First nozzle 14；Second nozzle group 9 includes multiple second nozzles 16；Third nozzle group 10 includes multiple third nozzles 16, in order to
Further increase the denitration efficiency of flue gas, the nozzle diameter of first nozzle 14, the nozzle diameter of the second nozzle 16, third spray
First 16 nozzle diameter is different.In this way, regional area setting that can be larger in the flue gas flow in same spray ammonia region 1
The larger nozzle of nozzle diameter improves the ammonia flow of the regional area with fining, to improve the denitration efficiency of flue gas.
For the ease of controlling the flow of the ammonia sprayed in each denitration region, the control valve is cut-off shutoff valve, cut-off shutoff valve tool
There is special spool, it is preferable linear with the presentation of valve relative discharge in 60% relative opening degree to 100% relative opening degree region
Relationship can obtain better regulating effect compared to common shut-off valve.
Correspondingly with a kind of spray ammonia system for denitrating flue gas of the invention, it is de- for flue gas that the present invention also provides one kind
The implementation of the spray ammonia system of nitre is used for cigarette for implementing described in above-mentioned technical proposal or its any preferred technical solution
The spray ammonia system of qi exhaustion nitre, includes the following steps：
1) cross section of denitration flue mouth is divided into the identical spray ammonia region 1 of multiple areas, be determined by calculation out each
Spray the flue gas flow and nitrogen oxides Flux Distribution in ammonia region 1；
2) ammonia flow needed for each spray ammonia region 1 is obtained according to the size of flue gas flow and nitrogen oxides flux；
3) a spray ammonia module 2 is respectively set in the ammonia flow needed for each spray ammonia region 1 in each spray ammonia region 1,
Ammonia flow needed for each spray ammonia region 1 determines the nozzle quantity in the spray ammonia module 2 in the spray ammonia region 1, the areas Pen An
Ammonia flow needed for domain 1 is bigger, and nozzle quantity is more possessed by the spray ammonia module 2 in the spray ammonia region 1；
4) different spray ammonia modules 2 is connected from different spray ammonia branch pipes 3, one control of setting on every spray ammonia branch pipe 3
Valve.
The present invention a kind of spray ammonia system for denitrating flue gas implementation be used for implement above-mentioned technical proposal or its
Certainly also there is the spray ammonia system for denitrating flue gas described in any preferred technical solution one kind of the present invention being used for flue gas
The advantageous effect of the spray ammonia system of denitration, details are not described herein again.
The present invention also provides a kind of spray ammonia system for denitrating flue gas implementation, deflector optimization basis
On, it uses the velocity of flue gas of flue at CFD flow field simulation ammonia-spraying grid positions to be distributed and determines each spray ammonia region 1 to calculate
Flue gas flow distribution and at this NOx concentration distribution of flue be combined and obtain NOx Flux Distributions, to which each spray be calculated
The NH in ammonia region 13(ammonia) flux, for NH3The small spray ammonia region 1 of flux suitably expands single 3 overlay area of spray ammonia branch pipe
(the relatively small number of nozzle of quantity is set i.e. in spraying ammonia module 2)；The big region of flux is by suitably increasing nozzle distribution density
(a fairly large number of nozzle is being set in spraying ammonia module 2) or increase the diameter of spray nozzle in spray ammonia module 2 to increase this
Spray NH in ammonia region 13Emitted dose；The arrangement and spacing of nozzle in spray ammonia module 2 are determined in this way.It is finally reached two
On the one hand a target ensures NH3/NOXMolar ratio distribution deviation requirement, on the other hand so that the NH of every spray ammonia branch pipe 33Injection
Amount is uniform.
For the ease of installation, modular structural shape may be used in the spray ammonia module 2, according to different spray ammonia
Different spray ammonia modules 2 is designed in region 1, will be sprayed in factory the nozzle in ammonia module 2, injection pipe group 4, spray ammonia branch pipe 3 and
Control valve installs, and scene only needs assembly welding.Control valve adjusts aperture also according to flow rate calculation, and scene is avoided accidentally to grasp
Work causes to spray the stream effect variation of ammonia module 2.
Preferably, in above-mentioned steps 3) in, in the bigger spray ammonia region 1 of required ammonia flow, in the spray ammonia region 1
The nozzle diameter for spraying the nozzle in ammonia module 2 is bigger.In this way, improve the ammonia flow of the regional area with can refining, from
And improve the denitration efficiency of flue gas.
The control valve can adjust injection to the total ammonia flow in each spray ammonia region 1, can be adjusted by control valve
So that the ammonia flow sprayed in different spray ammonia regions 1 is different so that the denitration efficiency of the flue gas in denitration flue is carried
It is high；Since the diameter of nozzle quantity and spray nozzle in each spray ammonia region 1 is different, so the part in each spray ammonia region 1
Ammonia flow can also be adjusted according to the flue gas flow of part, thus further so that the denitration efficiency of flue gas is able to
It improves.In order to advanced optimize the denitration efficiency in each spray ammonia region 1, denitration flue entrance can also detected using sensor
Different spray ammonia regions 1 flue gas flows, and adjust according to the result of detection the nozzle quantity and nozzle in each spray ammonia region 1
The diameter of nozzle, so that the ammonia flow that respectively spray ammonia region 1 is received mutually is fitted with the ammonia flow needed for the region denitrating flue gas
It answers.
Technical solution based on above-described embodiment, of the invention is a kind of for the spray ammonia system of denitrating flue gas and its embodiment party
Method adjusts the ammonia flow that is sprayed of each regional area at denitration flue mouth, spray ammonia region that can be larger in required ammonia flow
More ammonia is sprayed in 1, less ammonia is sprayed in the smaller spray ammonia region 1 of required ammonia flow, so that denitration
The denitration efficiency of each regional area at floss hole is improved, and is proved by testing, and one kind of the interests present invention being used for flue gas
The spray ammonia system and its implementation of denitration, can make the NH at denitration flue mouth3/NOXMolar ratio distribution deviation reaches 3%
Hereinafter, denitration efficiency can be promoted to 95%.
In conclusion the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (8)
1. a kind of spray ammonia system for denitrating flue gas, be set to denitration flue mouth, characterized in that the denitration flue mouth it is transversal
Face is divided into the identical spray ammonia region (1) of multiple areas, and the flue gas flow and nitrogen of each spray ammonia region (1) is determined by calculation out
Oxide flux, and the ammonia flow needed for each spray ammonia region (1) is obtained according to the size of flue gas flow and nitrogen oxides flux；
A spray ammonia module (2) is respectively set in ammonia flow needed for each spray ammonia region (1) in each spray ammonia region (1), sprays ammonia
Ammonia flow needed for region (1) is bigger, and nozzle quantity is more possessed by the spray ammonia module (2) in the spray ammonia region (1)；Often
One spray ammonia module (2) is connected with a spray ammonia branch pipe (3), every spray set on ammonia branch pipe (3) there are one control valve.
2. the spray ammonia system according to claim 1 for denitrating flue gas, it is characterised in that：It includes more to spray ammonia module (2)
A injection pipe group (4), each injection pipe group (4) include the first injection pipe (5), the second injection pipe (6) and third injection pipe (7)；
First injection pipe (5) is equipped with the first nozzle group (8), and the second injection pipe (6) is equipped with the second nozzle group (9), third injection pipe
(7) it is equipped with third nozzle group (10).
3. the spray ammonia system according to claim 2 for denitrating flue gas, it is characterised in that：First nozzle group (8)
In spacing between two neighboring nozzle be the first spacing (11), the spacing in the second nozzle group (9) between two neighboring nozzle
For the second spacing (12), the spacing in third nozzle group (10) between two neighboring nozzle is third spacing (13), the first spacing
(11), the second spacing (12) and third spacing (13) is of different sizes.
4. the spray ammonia system according to claim 3 for denitrating flue gas, it is characterised in that：First nozzle group (8) includes
Multiple first nozzles (14)；Second nozzle group (9) includes multiple second nozzles (16)；Third nozzle group (10) includes multiple thirds
Nozzle (16).
5. the spray ammonia system according to claim 4 for denitrating flue gas, it is characterised in that：First nozzle (14)
Nozzle diameter, the nozzle diameter of the second nozzle (16), the nozzle diameter of third nozzle (16) are different.
6. the spray ammonia system according to claim 1 for denitrating flue gas, it is characterised in that：The control valve is that cut-off is cut
Flow valve.
7. a kind of implementation of spray ammonia system for denitrating flue gas is used for flue gas for implementing described in claim 1 to 6
The spray ammonia system of denitration, characterized in that include the following steps：
1) cross section of denitration flue mouth is divided into the identical spray ammonia region (1) of multiple areas, each spray is determined by calculation out
The flue gas flow in ammonia region (1) is distributed；
2) ammonia flow needed for each spray ammonia region (1) is obtained according to the size of flue gas flow；
3) a spray ammonia module is respectively set in the ammonia flow needed for each spray ammonia region (1) in each spray ammonia region (1)
(2), the ammonia flow needed for each spray ammonia region (1) determines the nozzle number in the spray ammonia module (2) in the spray ammonia region (1)
Amount, the ammonia flow sprayed needed for ammonia region (1) is bigger, nozzle quantity possessed by the spray ammonia module (2) in the spray ammonia region (1)
It is more；
4) different spray ammonia modules (2) is connected from different spray ammonia branch pipes (3), one control of setting on every spray ammonia branch pipe (3)
Valve processed.
8. the implementation of the spray ammonia system according to claim 7 for denitrating flue gas, it is characterised in that：In above-mentioned step
It is rapid 3) in, in the bigger spray ammonia region (1) of required ammonia flow, the nozzle in spray ammonia module (2) in the spray ammonia region (1)
Nozzle diameter it is bigger.
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| CN201810128392.8A CN108392959A (en) | 2018-02-08 | 2018-02-08 | A kind of spray ammonia system and its implementation for denitrating flue gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109012104A (en) * | 2018-09-29 | 2018-12-18 | 苏州西热节能环保技术有限公司 | Boiler bypass flue direct-injection removes NOxAnd SO3System |
| CN109045967A (en) * | 2018-09-13 | 2018-12-21 | 苏州西热节能环保技术有限公司 | A kind of spray ammonia conglomerate integration AIG for Gas Generator Set waste heat boiler |
| CN111068518A (en) * | 2019-12-31 | 2020-04-28 | 国电九江发电有限公司 | Non-uniform ammonia spraying system and method for SCR denitration device |
| CN112691544A (en) * | 2019-10-22 | 2021-04-23 | 中国石油化工股份有限公司 | Ammonia spraying device for denitration and cracking furnace system with same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879401A (en) * | 2009-05-09 | 2010-11-10 | 江苏中科节能环保技术有限公司 | Reducing agent injection mechanism suitable for SCR reactor |
| CN102553411A (en) * | 2011-11-13 | 2012-07-11 | 哈尔滨锅炉厂有限责任公司 | Device and method for spraying ammonia gas into selective catalytic reduction denitrifying device |
| CN103657374A (en) * | 2013-12-12 | 2014-03-26 | 武汉华敏测控技术股份有限公司 | Real-time optimizing control system and method for ammonia spraying partitions of SCR device |
| CN204017659U (en) * | 2014-06-10 | 2014-12-17 | 四川大学 | The ammonia water spraying device of cement decomposing furnace SNCR method denitrating system |
| US20160279565A1 (en) * | 2015-03-27 | 2016-09-29 | Alstom Technology Ltd | Dual injection grid arrangement |
| CN106984191A (en) * | 2017-03-29 | 2017-07-28 | 华电电力科学研究院 | A kind of efficient hybrid system of reducing agent ammonia and its method of work for SCR denitrating flue gas |
-
2018
- 2018-02-08 CN CN201810128392.8A patent/CN108392959A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879401A (en) * | 2009-05-09 | 2010-11-10 | 江苏中科节能环保技术有限公司 | Reducing agent injection mechanism suitable for SCR reactor |
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