CN105797582B - A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration - Google Patents
A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration Download PDFInfo
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- CN105797582B CN105797582B CN201610284211.1A CN201610284211A CN105797582B CN 105797582 B CN105797582 B CN 105797582B CN 201610284211 A CN201610284211 A CN 201610284211A CN 105797582 B CN105797582 B CN 105797582B
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
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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
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/902—Multilayered catalyst
- B01D2255/9025—Three layers
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- 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
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- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of differentiation of SCR denitration to spray ammonia reactor, top sets third bend on the left of reactor body, top connects transition flue duct on the right side of reactor body, the junction of reactor body and transition flue duct is the second bend, transition flue duct includes vertical gas pass and horizontal flue, junction is the first bend, first corner, which is set, falls Hui Chu, horizontal flue inlet is smoke inlet, ammonia-spraying grid is set in horizontal flue, exhanst gas outlet is set below reactor body, multiple catalyst plates are set in reactor body, arc deflector is all provided in three bends；Ammonia-spraying grid includes more jet pipes of single-layered longitudinal arrangement, and multiple nozzles are arranged on every jet pipe.The present invention also provides a kind of spray ammonia methods, nozzle are divided into fringe region and the central area regions Liang Ge, and use different jet velocities, the spray ammonia speed of central area is less than fringe region.Beneficial effects of the present invention：It can be effectively improved the degree of mixing of flue gas and reducing agent ammonia, avoid the escaping of ammonia.
Description
Technical field
The present invention relates to the out of stock technical fields of SCR, spray ammonia reactor in particular to a kind of differentiation of SCR denitration
And spray ammonia method.
Background technology
The performance indicator of selective catalytic reduction (SCR) system includes mainly out of stock efficiency and NH3Escapement ratio.China is most
The SCR flue gas denitration reactors of power plant, which exist, reacts insufficient the phenomenon that leading to the escaping of ammonia, mainly since SCR denitrating flue gas is anti-
Answer the ammonia-spraying grid ammonia spraying amount of device inlet insufficient, it is difficult to ensure that flue gas is mixed with the uniform of ammonia.Meanwhile SCR denitration device
Catalyst plate lazy weight, nitrogen oxides and ammonia in flue gas cannot be made fully to react, the denitration of requirement cannot be reached
Efficiency.Therefore, the uniformity for improving the distribution of Catalytic Layer inlet flue gas and ammonia density distribution is the key that improve SCR system performance.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of differentiation of SCR denitration spray ammonia reactor and sprays
Ammonia method, the ammonia nitrogen mixing ratio being effectively improved in first floor catalyst inlet interface, lifting system denitration performance reduce the escaping of ammonia,
Effectively ABS is inhibited to generate.
The present invention provides a kind of differentiation of SCR denitration to spray ammonia reactor, including reactor body, the reactor sheet
It is equipped with third bend above the left side of body, transition flue duct, the reactor sheet are connected with above the right side of the reactor body
The junction of body and the transition flue duct is the second bend, and the transition flue duct includes vertical gas pass and horizontal flue, described to hang down
The junction of straight flue and the horizontal flue is the first bend, and first corner is equipped with and falls Hui Chu, the horizontal flue
Inlet be smoke inlet, ammonia-spraying grid is equipped in the horizontal flue, the lower section of the reactor body goes out equipped with flue gas
Mouthful, multiple catalyst plates are equipped in the reactor body, in first bend, second bend and the third bend
It is equipped with arc deflector；
Wherein, the ammonia-spraying grid includes single-layered more jet pipes, the more jet pipe longitudinal arrangements, described in every
Multiple nozzles are set on jet pipe.
As further improvement of the invention, the jet pipe shares 20, and 15, nozzle, nozzle are arranged on every jet pipe
Sum is 300.
It is improved as of the invention further, sets that there are three catalyst plates in the reactor body.
As further improvement of the invention, the catalyst plates are board-like catalyst.
The present invention also provides a kind of spray ammonia methods using SCR denitration reactor described in claim 1, by the spray
The nozzle of ammonia grid is divided into two regions, and all nozzles are fringe region I close to an outermost circle for the horizontal flue wall surface, are remained
The nozzle in nozzle and the central area II in region II centered on remaining region, the fringe region I is respectively adopted not
Same jet velocity.
As further improvement of the invention, the valve opening of all nozzles is adjusted, the injection of the fringe region I is improved
Speed, and reduce the jet velocity of the central area II.
As further improvement of the invention, make the jet velocity of the fringe region I more than the central area II's
Jet velocity.
As further improvement of the invention, the spray ammonia speed of the fringe region I is 15.2m/s, the central area
The spray ammonia speed of II is 13.7m/s.
Beneficial effects of the present invention are：
In the case of ammonia-spraying grid top nozzle quantity is fixed, nozzle is divided into fringe region and the central area areas Liang Ge
The spray ammonia speed in domain, and different jet velocities is respectively adopted, central area is less than fringe region, can be effectively improved flue gas with
The degree of mixing of reducing agent ammonia, avoids the escaping of ammonia.
Description of the drawings
Fig. 1 is that a kind of differentiation of SCR denitration described in the embodiment of the present invention sprays the structural schematic diagram of ammonia reactor；
Fig. 2 is the plan view of catalyst plates in Fig. 1；
Fig. 3 is the plan view of ammonia-spraying grid in Fig. 1.
In figure,
1, reactor body；2, smoke inlet；3, exhanst gas outlet；4, ammonia-spraying grid；5, transition flue duct；6, Hui Chu is fallen；7、
Catalyst plates；8, vertical gas pass；9, horizontal flue；10, the first bend；11, the second bend；12, third bend.
Specific implementation mode
It is described in further detail below by specific embodiment and in conjunction with attached drawing to the present invention.
Embodiment 1, as shown in Figure 1, a kind of differentiation of SCR denitration of the embodiment of the present invention sprays ammonia reactor, including it is anti-
Device ontology 1 is answered, third bend 12 is equipped with above the left side of reactor body 1, transition is connected with above the right side of reactor body 1
The junction of flue 5, reactor body 1 and transition flue duct 5 is the second bend 11, and transition flue duct 5 includes vertical gas pass 8 and level
The junction of flue 9, vertical gas pass 8 and horizontal flue 9 is the first bend 10, is equipped with and is fallen 6 at ash at the first bend 10, horizontal cigarette
The inlet in road 9 is smoke inlet 2, and ammonia-spraying grid 4 is equipped in horizontal flue 9, and the lower section of reactor body 1 is equipped with exhanst gas outlet
3, reactor body 1 is interior to be equipped with multiple catalyst plates 7, and arc is equipped in the first bend 10, the second bend 11 and third bend 12
Shape deflector；Ammonia-spraying grid 4 includes single-layered more jet pipes, and more jet pipe longitudinal arrangements are arranged on every jet pipe multiple
Nozzle.
Further, jet pipe shares 20, and 15, nozzle is arranged on every jet pipe, and nozzle sum is 300.Reactor
Catalyst plates 7 there are three being set in ontology 1.As shown in Fig. 2, catalyst plates 7 are board-like catalyst.
Embodiment 2, as shown in figure 3, the present invention also provides a kind of spray ammonia sides for spraying ammonia reactor using above-mentioned differentiation
Method.20 jet pipe longitudinal arrangements, and 15, nozzle is set on every jet pipe, nozzle sum is 300.It is fixed in nozzle quantity
In the case of, all nozzles of ammonia-spraying grid 4 are divided into two regions, an outermost circle of all nozzles close to 9 wall surface of horizontal flue
For fringe region I, the nozzle difference in the nozzle and central area II in region II centered on remaining region, fringe region I
Using different jet velocities.
Further, since the nozzle number in the II of central area is more than the nozzle number in fringe region I, if using same
Spray ammonia speed, it will lead to the NH of fringe region I3Concentration ratio central area II it is low, therefore, it is necessary to adjust the valve of all nozzles
Door aperture, improves the jet velocity of fringe region I, and reduces the jet velocity of central area II.
Further, in order to ensure the degree of mixing of flue gas and reducing agent ammonia, it is ensured that the jet velocity of fringe region I
More than the jet velocity of central area II.
When specifically used, the mould of reducing agent ammonia and flue gas flow field and mixed effect in SCR reactor flues is initially set up
Quasi- computational methods and model；Then, at the flue straight tube of model and corner carry out gridding division, ammonia-spraying grid carry out it is non-
Gridding divides, and the setting of boundary condition；Finally, sunykatuib analysis ammonia-spraying grid top nozzle jet velocity is to reactor inlet cigarette
The influence of reducing agent ammonia and flue gas concentration field on road.Adjustment by multiple analog approach to spray ammonia speed is found with side
The increase of the spray ammonia speed difference of edge region I and central area II, the NH in fringe region I and central area II3Concentration difference it is first
Increase after reduction.The best spray ammonia speed for finally choosing the areas I is 15.2m/s, and the best spray ammonia speed in IIth area is 13.7m/s.Through
Flow field simulation is crossed, the concentration that ammonia enters at catalyst inlet after finding after the adjustment has obtained preferable improvement, and concentration standard is inclined
Difference is 4.16%, meets reactor inlet ammonia concentration Spreading requirements in practical engineering application.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of differentiation of SCR denitration sprays ammonia reactor, which is characterized in that including reactor body（1）, the reactor sheet
Body（1）Left side above be equipped with third bend（12）, the reactor body（1）Right side above be connected with transition flue duct（5）,
The reactor body（1）With the transition flue duct（5）Junction be the second bend（11）, the transition flue duct（5）Including
Vertical gas pass（8）And horizontal flue（9）, the vertical gas pass（8）With the horizontal flue（9）Junction be the first bend
（10）, first bend（10）Place is equipped with and falls Hui Chu（6）, the horizontal flue（9）Inlet be smoke inlet（2）, institute
State horizontal flue（9）It is interior to be equipped with ammonia-spraying grid（4）, the reactor body（1）Lower section be equipped with exhanst gas outlet（3）, described anti-
Answer device ontology（1）It is interior to be equipped with multiple catalyst plates（7）, first bend（10）, second bend（11）With the third
Bend（12）Inside it is equipped with arc deflector；
Wherein, the ammonia-spraying grid（4）Including single-layered more jet pipes, the more jet pipe longitudinal arrangements, described in every
Multiple nozzles are set on jet pipe；
The ammonia-spraying grid（4）Nozzle be divided into two regions, all nozzles are close to the horizontal flue（9）Outermost the one of wall surface
It is fringe region I to enclose, in the nozzle and the central area II in region II centered on remaining region, the fringe region I
Nozzle different jet velocities is respectively adopted；
Wherein, the nozzle number in the II of central area adjusts the valve opening of all nozzles more than the nozzle number in fringe region I,
The jet velocity of fringe region I is improved, and reduces the jet velocity of central area II, makes the jet velocity of the fringe region I
More than the jet velocity of the central area II.
2. differentiation according to claim 1 sprays ammonia reactor, which is characterized in that the jet pipe shares 20, and every
15, nozzle is set on jet pipe, and nozzle sum is 300.
3. differentiation according to claim 1 sprays ammonia reactor, which is characterized in that the reactor body（1）Inside it is equipped with
Three catalyst plates（7）.
4. differentiation according to claim 1 sprays ammonia reactor, which is characterized in that the catalyst plates（7）It is urged to be board-like
Agent.
5. a kind of spray ammonia method for spraying ammonia reactor using differentiation described in claim 1, which is characterized in that by the spray ammonia
Grid（4）Nozzle be divided into two regions, all nozzles are close to the horizontal flue（9）An outermost circle for wall surface is fringe region
The nozzle in nozzle and the central area II in I, region II centered on remaining region, the fringe region I is adopted respectively
With different jet velocities；
The valve opening for adjusting all nozzles, improves the jet velocity of the fringe region I, and reduces the central area II's
Jet velocity；
The jet velocity of the fringe region I is set to be more than the jet velocity of the central area II；
Wherein, the spray ammonia speed of the fringe region I is 15.2m/s, and the spray ammonia speed of the central area II is 13.7m/s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284211.1A CN105797582B (en) | 2016-04-29 | 2016-04-29 | A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284211.1A CN105797582B (en) | 2016-04-29 | 2016-04-29 | A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration |
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| CN105797582A CN105797582A (en) | 2016-07-27 |
| CN105797582B true CN105797582B (en) | 2018-07-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113617206B (en) * | 2020-05-07 | 2023-08-22 | 江苏海默环保科技有限公司 | Control method of spray gun, control system of spray gun and incineration system |
| CN113491933B (en) * | 2021-09-10 | 2021-11-19 | 鑫领域智能科技(邳州)有限公司 | Hot-galvanize pickling is handled with high-efficient acid mist treatment tower |
| CN114669145A (en) * | 2021-12-31 | 2022-06-28 | 云南龙镁环境科技有限公司 | Combined device for high-temperature flue gas denitration and use method thereof |
Citations (3)
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|---|---|---|---|---|
| CN201643983U (en) * | 2010-02-26 | 2010-11-24 | 中国大唐集团科技工程有限公司 | Gas injection grill and flue gas denitration device |
| CN103927420A (en) * | 2014-04-22 | 2014-07-16 | 东南大学 | Method for optimizing gas-solid two-phase flow field and ammonia spraying of selective catalytic reduction denitration device |
| CN205586827U (en) * | 2016-04-29 | 2016-09-21 | 大唐环境产业集团股份有限公司 | Ammonia reactor is spouted to differentiation of SCR denitration |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102018484B1 (en) * | 2011-06-05 | 2019-09-05 | 존슨 맛쎄이 퍼블릭 리미티드 컴파니 | Platinum group metal (pgm) catalyst for treating exhaust gas |
| US9089799B2 (en) * | 2011-08-08 | 2015-07-28 | Ti Group Automotive Systems, L.L.C. | Fluid distribution system with filtration |
| US20130000743A1 (en) * | 2011-06-29 | 2013-01-03 | Ti Group Automotive Systems, L.L.C. | Scr fluid distribution and circulation system |
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- 2016-04-29 CN CN201610284211.1A patent/CN105797582B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201643983U (en) * | 2010-02-26 | 2010-11-24 | 中国大唐集团科技工程有限公司 | Gas injection grill and flue gas denitration device |
| CN103927420A (en) * | 2014-04-22 | 2014-07-16 | 东南大学 | Method for optimizing gas-solid two-phase flow field and ammonia spraying of selective catalytic reduction denitration device |
| CN205586827U (en) * | 2016-04-29 | 2016-09-21 | 大唐环境产业集团股份有限公司 | Ammonia reactor is spouted to differentiation of SCR denitration |
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