CN109364712A - A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration - Google Patents
A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration Download PDFInfo
- Publication number
- CN109364712A CN109364712A CN201811512114.9A CN201811512114A CN109364712A CN 109364712 A CN109364712 A CN 109364712A CN 201811512114 A CN201811512114 A CN 201811512114A CN 109364712 A CN109364712 A CN 109364712A
- Authority
- CN
- China
- Prior art keywords
- spray gun
- spray
- atomization
- flue gas
- gun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims abstract description 120
- 238000000889 atomisation Methods 0.000 title claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000003546 flue gas Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 4
- 230000023556 desulfurization Effects 0.000 claims abstract description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 13
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000012387 aerosolization Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- 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)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of flue gas cooled steam atomization spray guns suitable for SNCR method denitration, including spray head, barral of a gun, cooling duct, water vapour atomization air hose, spray gun cooling wind casing and spray gun solution conduit；Barral of a gun is inserted in spray gun cooling wind casing, and spray head is connected with the end of barral of a gun, and spray gun solution conduit is connected with spray head, and water vapour atomization air hose is connected with spray head, and cooling duct is connected with spray gun cooling wind casing.The SNCR denitrification spray gun is using water vapour as atomization wind, and using the neat stress after desulfurization and dedusting as cooling wind, oxygen content in flue gas, effectively avoids the gaseous state NH for wind being atomized due to spray gun and cooling wind oxidation sprays into around significant decrease spray gun3And cause to generate NOx, therefore the denitration efficiency of the spray gun is high.
Description
Technical field
The invention belongs to circulating fluidized bed boiler selective non-catalytic reduction method denitration applied technical fields, are related to a kind of suitable
Flue gas cooled steam atomization spray gun for SNCR method denitration.
Background technique
Currently, SNCR denitration is a kind of denitration technology of mainstream, denitration efficiency is generally 50%~80% or so.Due to
Low investment and low operating cost, SNCR denitration technology are particularly suitable for the use of Small And Medium Capacity boiler, are particularly applied to recycle stream
The synthesis good cost performance of fluidized bed boiler.
SNCR denitration technology is by amino reductive (such as ammonium hydroxide or urea liquid) solution atomization using spray gun into drop
It sprays into burner hearth or the high-temperature flue gas (850~1050 DEG C) at other positions, pyrolysis generates gaseous state NH3, do not adding catalyst
Under the conditions of, NH3With NOxSelective non-catalytic reduction reaction is carried out, by NOxIt is reduced into N2With H2O。
Core equipment one of of the spray gun as SNCR denitration system, the structure and performance of spray gun will significantly determine SNCR system
Denitration efficiency.
The angle being atomized from drop, mainly has applied to the spray gun of SNCR denitration system: mechanical atomization spray gun and sky at present
Aerosolization spray gun etc..Circulating fluidized bed boiler SNCR denitration system is especially most commonly seen with air atomization spray gun.Air atomization spray gun
Wind is generally atomized as spray gun using compressed air.
From the angle of cooling spray gun, hp fluid air, cold one are generally used applied to the spray gun of SNCR denitration system at present
Secondary wind or compressed air etc. are used as spray gun cooling wind.
Since SNCR denitrification spray gun is generally installed in the high-temperature flue gas for being exposed to 850~1050 DEG C, as atomization wind or cold
But the oxygen in the air of wind will can spray into the gaseous state NH in furnace to a certain extent under high temperature environment3Further oxidation generates
NOx, therefore influence the denitration efficiency of spray gun.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of cigarette suitable for SNCR method denitration is provided
The denitration efficiency of air cooling formula steam atomization spray gun, the spray gun is high.
In order to achieve the above objectives, the flue gas cooled steam atomization spray gun packet of the present invention suitable for the denitration of SNCR method
Include spray head, barral of a gun, cooling duct, water vapour atomization air hose, spray gun cooling wind casing and spray gun solution conduit；
Barral of a gun is inserted in spray gun cooling wind casing, and spray head is connected with the end of barral of a gun, spray gun solution conduit and spray head phase
Connection, water vapour atomization air hose are connected with spray head, and cooling duct is connected with spray gun cooling wind casing.
One end of spray gun solution conduit is connected with denitrification reducing agent fluid coupler, the other end and the spray head phase of spray gun solution conduit
Connection.
One end of water vapour atomization air hose is connected with spray gun atomization blast connection, and water vapour is atomized the other end and the spray of air hose
Head is connected.
One end of cooling duct is connected with spray gun cooling wind connector, the other end and the spray gun cooling wind casing phase of cooling duct
Connection.
Valve is provided in water vapour atomization air hose, cooling duct and spray gun solution conduit.
The invention has the following advantages:
Flue gas cooled steam atomization spray gun of the present invention suitable for the denitration of SNCR method passes through when specific operation
Water vapour atomization air hose inputs water vapour into spray head, inputs denitrification reducing agent liquid into spray head by spray gun solution conduit, leads to
Supercooling air hose inputs the neat stress after desulfurization and dedusting into spray gun cooling wind casing, using water vapour as atomization wind, with net cigarette
Gas is as cooling wind, to significantly reduce around spray gun oxygen content in flue gas, effectively avoids being atomized wind and cooling wind due to spray gun
Aoxidize the gaseous state NH sprayed into3And cause to generate NOx, to significantly improve NOxRemoval efficiency.In addition, it is necessary to explanation, this
Invention using water vapour as spray gun be atomized wind, can it is appropriate reduce denitrification reducing agent solution in dilution water consumption, tie
Structure is simple, easy to operate, and practicability is extremely strong.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 it is spray head, 2 be barral of a gun, 3 be spray gun cooling wind casing, 4 be denitrification reducing agent fluid coupler, 5 is spray
Rifle atomization blast connection, 6 are spray gun cooling wind connector.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the flue gas cooled steam atomization spray gun of the present invention suitable for the denitration of SNCR method includes spray head
1, barral of a gun 2, cooling duct, water vapour atomization air hose, spray gun cooling wind casing 3 and spray gun solution conduit；It is cold that barral of a gun 2 is inserted in spray gun
But in windband pipe 3, spray head 1 is connected with the end of barral of a gun 2, and spray gun solution conduit is connected with spray head 1, water vapour be atomized air hose with
Spray head 1 is connected, and cooling duct is connected with spray gun cooling wind casing 3, wherein water vapour is atomized air hose, cooling duct and spray
Valve is provided in rifle solution conduit.
One end of spray gun solution conduit is connected with denitrification reducing agent fluid coupler 4, the other end and spray head 1 of spray gun solution conduit
It is connected；One end of water vapour atomization air hose is connected with spray gun atomization blast connection 5, and water vapour is atomized the other end and the spray of air hose
First 1 is connected；One end of cooling duct is connected with spray gun cooling wind connector 6, the cooling windband of the other end and spray gun of cooling duct
Pipe 3 is connected.
The present invention is when specific operation, and the spray gun is atomized elegance vapor, after spray gun cooling wind uses desulfurization and dedusting
Neat stress, therefore the oxygen content around spray gun in flue gas is lower, it is possible to prevente effectively from since spray gun is atomized wind and cooling wind oxygen
Change the gaseous state NH sprayed into3And cause to generate NOx, to significantly improve NOxRemoval efficiency.
In practical operation, spray gun can be designed to corresponding size according to actual needs, and spray head 1 can also be adjusted therewith
It is whole, the performance parameters such as 1 flow of spray head and operating pressure can also be changed in the case where not changing 1 appearance of spray head.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.The scope of the present invention
By appended claims and its equivalent limit.
Claims (7)
1. a kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration, which is characterized in that including spray head (1), rifle
Bar (2), cooling duct, water vapour atomization air hose, spray gun cooling wind casing (3) and spray gun solution conduit；
Barral of a gun (2) is inserted in spray gun cooling wind casing (3), and spray head (1) is connected with the end of barral of a gun (2), spray gun solution conduit
It is connected with spray head (1), water vapour atomization air hose is connected with spray head (1), and cooling duct is connected with spray gun cooling wind casing (3)
It is logical.
2. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
One end of spray gun solution conduit is connected with denitrification reducing agent fluid coupler (4), and the other end of spray gun solution conduit is connected with spray head (1)
It is logical.
3. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
One end of water vapour atomization air hose is connected with spray gun atomization blast connection (5), and water vapour is atomized the other end and spray head (1) of air hose
It is connected.
4. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
One end of cooling duct is connected with spray gun cooling wind connector (6), and the other end of cooling duct is connected with spray gun cooling wind casing (3)
It is logical.
5. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
Valve is provided in water vapour atomization air hose, cooling duct and spray gun solution conduit.
6. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
Spray gun is atomized air hose access vapor as spray gun and is atomized wind.
7. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
Neat stress after spray gun cooling duct access desulfurization and dedusting is as spray gun cooling wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811512114.9A CN109364712B (en) | 2018-12-11 | 2018-12-11 | Flue gas cooling type steam atomization spray gun suitable for SNCR (selective non-catalytic reduction) denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811512114.9A CN109364712B (en) | 2018-12-11 | 2018-12-11 | Flue gas cooling type steam atomization spray gun suitable for SNCR (selective non-catalytic reduction) denitration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109364712A true CN109364712A (en) | 2019-02-22 |
| CN109364712B CN109364712B (en) | 2024-05-28 |
Family
ID=65373233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811512114.9A Active CN109364712B (en) | 2018-12-11 | 2018-12-11 | Flue gas cooling type steam atomization spray gun suitable for SNCR (selective non-catalytic reduction) denitration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109364712B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109893976A (en) * | 2019-03-18 | 2019-06-18 | 新乡市华丰环保机械设备有限公司 | A kind of denitration in the stove device |
| CN111229008A (en) * | 2020-03-20 | 2020-06-05 | 中国华能集团清洁能源技术研究院有限公司 | Adjustable pressure boosting type injection device and method for denitration of flue gas of CFB boiler |
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| GB1488087A (en) * | 1975-03-04 | 1977-10-05 | Zink Co John | Process for disposal of oxides of nitrogen |
| CN102688681A (en) * | 2012-05-25 | 2012-09-26 | 中国华能集团清洁能源技术研究院有限公司 | Air cooling type air atomization spray gun applicable to denitration by SNCR (selective non-catalytic reduction) method |
| CN202844862U (en) * | 2012-09-24 | 2013-04-03 | 山东蓝天节能环保科技有限公司 | Smoke denitration device |
| CN103506000A (en) * | 2013-10-15 | 2014-01-15 | 华电电力科学研究院 | Atomization ejection device and method for SNCR (Selective Non Catalytic Reduction) denitration |
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-
2018
- 2018-12-11 CN CN201811512114.9A patent/CN109364712B/en active Active
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Non-Patent Citations (1)
| Title |
|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109893976A (en) * | 2019-03-18 | 2019-06-18 | 新乡市华丰环保机械设备有限公司 | A kind of denitration in the stove device |
| CN111229008A (en) * | 2020-03-20 | 2020-06-05 | 中国华能集团清洁能源技术研究院有限公司 | Adjustable pressure boosting type injection device and method for denitration of flue gas of CFB boiler |
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| Publication number | Publication date |
|---|---|
| CN109364712B (en) | 2024-05-28 |
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