CN108722186B - Array type nozzle device - Google Patents
Array type nozzle device Download PDFInfo
- Publication number
- CN108722186B CN108722186B CN201810903906.2A CN201810903906A CN108722186B CN 108722186 B CN108722186 B CN 108722186B CN 201810903906 A CN201810903906 A CN 201810903906A CN 108722186 B CN108722186 B CN 108722186B
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- CN
- China
- Prior art keywords
- nozzle
- ammonia
- section
- spray pipe
- smoke box
- 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.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000007921 spray Substances 0.000 claims abstract description 30
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 22
- 239000000779 smoke Substances 0.000 claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 13
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 11
- 230000023556 desulfurization Effects 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000002356 single layer Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 230000003197 catalytic effect Effects 0.000 claims description 5
- 238000007865 diluting Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 description 8
- 239000003463 adsorbent Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- 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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (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)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses an array type nozzle device, which comprises a plurality of spray pipes which are uniformly distributed on the section of an inlet of a smoke box of a desulfurization and denitrification tower in parallel, wherein each spray pipe is horizontally and uniformly distributed in a single layer; each spray pipe is arranged in the smoke box, the tail end blind plate is closed, the head end opening extends out of the smoke box to form an ammonia gas inlet, and the spray pipes are fixedly connected through an end flange arranged outside the smoke box; a plurality of nozzles are uniformly distributed on each spray pipe in a single row, and the opening direction of each nozzle is arranged in parallel with the flue gas; the nozzle comprises a cylindrical lower straight section and a bell-mouth-shaped upper divergent section, and the opening angle of the bell mouth is 40-50 degrees. According to the invention, the injection of diluted ammonia is performed by using the nozzles arranged in a single-layer array manner, and the special specification and the shape of the nozzles with the horn openings are matched, so that the ammonia injection is more uniform, the full reaction of ammonia and flue gas can be effectively realized, and the optimal denitration effect and the minimum ammonia escape are achieved.
Description
Technical Field
The invention belongs to the field of environmental engineering, and particularly relates to an array type nozzle device for diluting ammonia gas for denitration in a boiler flue gas combined desulfurization and denitration device with a carbon-based catalyst as an adsorbent and a catalyst.
Background
The carbon-based catalyst flue gas desulfurization and denitration technology principle is as follows: SO in flue gas under the adsorption and catalysis actions of carbon-based catalyst 2 And O 2 H and H 2 0 reacts to generate H 2 SO 4 ，H 2 SO 4 Adsorbing on the surface of the carbon-based catalyst; simultaneously, by utilizing the catalytic performance of the carbon-based catalyst, NOx in the flue gas and diluted ammonia are subjected to catalytic reduction reaction to generate N 2 Recycling the regenerated carbon-based catalyst after adsorption catalytic reactionUtilization. Injecting diluted ammonia gas into the desulfurization and denitrification device for realizing denitrification reaction in the flue gas purification process, and converting NOx in the flue gas into N 2 。
In the prior art, an ammonia spraying device aiming at a carbon-based catalytic desulfurization and denitrification system is not available, and even mixing of ammonia and flue gas cannot be realized, so that the optimal denitrification effect and the minimum ammonia escape are achieved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an ammonia spraying device capable of effectively realizing uniform mixing of ammonia and flue gas.
In order to achieve the above purpose, the invention provides an array nozzle device which is used for diluting ammonia injection in a carbon-based catalytic desulfurization and denitrification system; the array type nozzle device comprises a plurality of spray pipes which are uniformly distributed on the section of the inlet of the smoke box of the desulfurization and denitrification tower in parallel, wherein each spray pipe is horizontally and uniformly distributed in a single layer; each spray pipe is arranged in the smoke box, the tail end blind plate is closed, the head end opening extends out of the smoke box to form an ammonia gas inlet, and the spray pipes are fixedly connected through an end flange arranged outside the smoke box; a plurality of nozzles are uniformly distributed on each spray pipe in a single row, and the opening direction of each nozzle is arranged in parallel with the flue gas; the nozzle comprises a cylindrical lower straight section and a bell-mouth-shaped upper divergent section, and the opening angle of the bell mouth is 40-50 degrees.
Further, the total height of the nozzle is 35-45mm, and the ratio of the height of the lower straight section to the height of the upper divergent section is 0.45:0.55; the diameter of the biggest opening of the bell mouth at the diverging section of the upper part of the nozzle is 40-50mm; the diameter of the straight section of the lower part of the nozzle is half of the diameter of the biggest opening of the bell mouth at the divergent section of the upper part.
Further, the opening angle of the flare at the diverging section of the upper part of the nozzle is preferably 45 °.
Further, the total height of the nozzle is 40mm; the diameter of the biggest opening of the bell mouth at the diverging section of the upper part of the nozzle is 45mm.
Further, the diameter of the nozzle is 90-110mm, preferably 100mm.
Further, diluted ammonia is injected through the ammonia inlet of each nozzle, and the flow rate of the diluted ammonia is 30-50m/s, preferably 40m/s.
Compared with the prior art, the invention has the following advantages:
according to the invention, the injection of diluted ammonia is performed by using the nozzles arranged in a single-layer array manner, and the special specification and the shape of the nozzles with the horn openings are matched, so that the ammonia injection is more uniform, the full reaction of ammonia and flue gas can be effectively realized, and the optimal denitration effect and the minimum ammonia escape are achieved.
Drawings
FIG. 1 is a schematic view of an array nozzle apparatus according to the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic view of the structure of the individual nozzles comprising the array of FIG. 1;
FIG. 4 is a schematic view of the arrangement of the pipe array of FIG. 1;
fig. 5 is a schematic view of the nozzle in fig. 3.
In the figure, a desulfurization and denitrification tower is shown as the following formula 1; 2-a smoke box; 3-tube rows; 4-spraying pipes; 5-nozzle; 6-ammonia gas inlet;
in fig. 4, a and b are the width and length of the inlet section of the smoke box 2, respectively; a1 is the interval between adjacent nozzles on each spray pipe; b1 is the gap between the outer walls of the spray pipes at the two ends and the inner wall of the smoke box; b2 is the vertical gap between each nozzle on adjacent spray pipes;
in fig. 5, t is the total height of the nozzle, t1 is the height of the diverging section, t2 is the height of the straight section, d is the maximum diameter of the diverging section, d1 is the diameter of the straight section, and α is the angle of the horn opening.
Detailed Description
The following examples are illustrative only. The invention is capable of numerous modifications and variations in detail within the spirit and scope of the present invention. And the carbon-based catalyst mentioned in the present invention is modified activated carbon, belonging to one kind of activated carbon, and all the adsorbents belonging to the class of activated carbon include: conventional activated carbon, activated coke, carbon-based adsorbents, etc. are included within the scope of the present invention.
The following detailed description refers to the accompanying drawings.
As shown in fig. 1 and 2, the array nozzle device is arranged at the inlet of the smoke box 2 to realize uniform injection of diluted ammonia gas and complete reaction with smoke gas in the desulfurization and denitrification tower 1. The array type nozzle device is a single-layer horizontally arranged tube array 3, and is combined with figures 3 and 4, the tube array 3 consists of n spray tubes 4, the cross sections of the inlets of the smoke box 2 are horizontally and uniformly distributed, and the number of the spray tubes is set according to the size of the cross sections of the inlets by the formula b=2×b1+ (n-1) ×b2. Meanwhile, the diameter of the nozzle 4 is set to 90 to 110mm, preferably 100mm.
The nozzles 5 are uniformly distributed on the spray pipes 4 in a single row, the formula a= (m-1) x a1, m is the number of the nozzles on each spray pipe, and the number of the nozzles is set according to the size of the warehouse-in section. The spray pipe 4 is provided with a round hole with the same diameter as the inner hole of the nozzle 5, and is in butt joint with the round hole of the nozzle 5 when fixed.
As shown in fig. 5, the specific specifications of the nozzle arrangement are as follows: the injection angle α=40 to 50° of the nozzle 5 is preferably 45 °; the height t=35-45 mm of the nozzle 5, preferably 40mm, the diverging section height t1=0.55 t, and the straight Duan Gaodu t1=0.45 t; the outer diameter d=40 to 50mm, preferably 45mm, of the nozzle 5 and the inner diameter d1=0.5 d.
When the spray pipe is installed, the spray pipe 4 is inserted into the smoke box, the tail end blind plate is closed and is close to the inner wall of the smoke box, the head end opening extends out of the smoke box to form an ammonia gas inlet 6, and the ammonia gas inlet is fixed with the smoke box through the end flange.
When diluted ammonia gas is injected, diluted ammonia gas is injected into the corresponding spray pipe 4 through the ammonia gas inlet 6, and the flow velocity v of the diluted ammonia gas in the spray pipe 4 is controlled to be 30-50m/s, preferably 40m/s.
Claims (5)
1. An array nozzle device is used for diluting ammonia gas injection in a desulfurization and denitrification system by a carbon-based catalytic method; the method is characterized in that: the array type nozzle device comprises a plurality of spray pipes which are uniformly distributed on the section of the inlet of the smoke box of the desulfurization and denitrification tower in parallel, and each spray pipe is horizontally and uniformly distributed in a single layer; each spray pipe is arranged in the smoke box, the tail end blind plate is closed, the head end opening extends out of the smoke box to form an ammonia gas inlet, and the spray pipes are fixedly connected through an end flange arranged outside the smoke box; a plurality of nozzles are uniformly distributed on each spray pipe in a single row, and the opening direction of each nozzle is arranged in parallel with the flue gas; the nozzle comprises a cylindrical lower straight section and a bell-mouth-shaped upper divergent section, and the opening angle of the bell mouth is 40-50 degrees; the total height of the nozzle is 35-45mm, and the ratio of the height of the lower straight section to the height of the upper divergent section is 0.45:0.55; the diameter of the biggest opening of the bell mouth at the diverging section of the upper part of the nozzle is 40-50mm; the diameter of the straight section of the lower part of the nozzle is half of the diameter of the biggest opening of the bell mouth at the divergent section of the upper part; the opening angle of the bell mouth at the diverging section at the upper part of the nozzle is 45 degrees; diluted ammonia is injected through an ammonia inlet of each spray pipe, and the flow rate of the diluted ammonia is 30-50m/s.
2. The array nozzle apparatus of claim 1, wherein: the total height of the nozzle is 40mm; the diameter of the biggest opening of the bell mouth at the diverging section at the upper part of the nozzle is 45mm.
3. An array nozzle apparatus as claimed in claim 2, wherein: the diameter of the spray pipe is 90-110mm.
4. An array nozzle apparatus as claimed in claim 3, wherein: the diameter of the spray pipe is 100mm.
5. The array nozzle apparatus of claim 1, wherein: the flow rate of the diluted ammonia was 40m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903906.2A CN108722186B (en) | 2018-08-09 | 2018-08-09 | Array type nozzle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903906.2A CN108722186B (en) | 2018-08-09 | 2018-08-09 | Array type nozzle device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108722186A CN108722186A (en) | 2018-11-02 |
| CN108722186B true CN108722186B (en) | 2024-03-08 |
Family
ID=63942590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810903906.2A Active CN108722186B (en) | 2018-08-09 | 2018-08-09 | Array type nozzle device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108722186B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057766A (en) * | 1996-08-21 | 1998-03-03 | Nkk Corp | Method for supplying reaction gas to catalyst |
| JP2000000434A (en) * | 1998-06-15 | 2000-01-07 | Babcock Hitachi Kk | Denitration apparatus and denitration method |
| CN202860407U (en) * | 2012-10-24 | 2013-04-10 | 中国石油化工股份有限公司 | Full mixing-type ammonia spraying component |
| CN104096477A (en) * | 2014-07-09 | 2014-10-15 | 华中科技大学 | Static mixer for selective catalytic reduction flue gas denitration system |
| CN205042605U (en) * | 2015-09-28 | 2016-02-24 | 中国地质科学院矿产综合利用研究所 | Spiral-flow type ultrasonic cavitation float electromagnetic concentration equipment |
| CN107398175A (en) * | 2017-09-06 | 2017-11-28 | 国电科学技术研究院 | A kind of carbon base catalyst desulfurization and denitrification integral reactor |
| CN208642324U (en) * | 2018-08-09 | 2019-03-26 | 国电环境保护研究院有限公司 | A kind of array spray nozzle device |
-
2018
- 2018-08-09 CN CN201810903906.2A patent/CN108722186B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1057766A (en) * | 1996-08-21 | 1998-03-03 | Nkk Corp | Method for supplying reaction gas to catalyst |
| JP2000000434A (en) * | 1998-06-15 | 2000-01-07 | Babcock Hitachi Kk | Denitration apparatus and denitration method |
| CN202860407U (en) * | 2012-10-24 | 2013-04-10 | 中国石油化工股份有限公司 | Full mixing-type ammonia spraying component |
| CN104096477A (en) * | 2014-07-09 | 2014-10-15 | 华中科技大学 | Static mixer for selective catalytic reduction flue gas denitration system |
| CN205042605U (en) * | 2015-09-28 | 2016-02-24 | 中国地质科学院矿产综合利用研究所 | Spiral-flow type ultrasonic cavitation float electromagnetic concentration equipment |
| CN107398175A (en) * | 2017-09-06 | 2017-11-28 | 国电科学技术研究院 | A kind of carbon base catalyst desulfurization and denitrification integral reactor |
| CN208642324U (en) * | 2018-08-09 | 2019-03-26 | 国电环境保护研究院有限公司 | A kind of array spray nozzle device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108722186A (en) | 2018-11-02 |
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