CN105561783A - Novel vortex street strong-mixing ammonia spraying device - Google Patents
Novel vortex street strong-mixing ammonia spraying device Download PDFInfo
- Publication number
- CN105561783A CN105561783A CN201610092161.7A CN201610092161A CN105561783A CN 105561783 A CN105561783 A CN 105561783A CN 201610092161 A CN201610092161 A CN 201610092161A CN 105561783 A CN105561783 A CN 105561783A
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- CN
- China
- Prior art keywords
- ammonia
- spraying device
- gas spraying
- group
- jet pipe
- 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 title claims abstract description 160
- 238000005507 spraying Methods 0.000 title claims abstract description 105
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 210000002445 nipple Anatomy 0.000 claims description 10
- 210000004534 cecum Anatomy 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 boiler Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B01D53/8621—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
- 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
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- 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)
Abstract
The invention relates to a novel vortex street strong-mixing ammonia spraying device which comprises a plurality of ammonia spraying units evenly arranged inside a flue. Each ammonia spraying unit comprises a spraying pipe, wherein the cross section of the spraying pipe is in a crescent shape, an ammonia conveying pipe is connected to the center of the inward concave surface of the spraying pipe, and a plurality of ammonia spraying device bodies are evenly arranged on the outward convex surface facing the flue gas incoming flow of the spraying pipe. The ammonia spraying device comprises spraying holes formed in the spraying pipes. The spraying holes are connected with nozzle short sections. The nozzle short sections are provided with nozzles. According to the vortex street strong-mixing ammonia spraying device, a stable vortex street can be formed, so that flue gas disturbance is enhanced, the mixing length of ammonia and flue can be decreased, and the good uniform mixing effect can be formed for a large flue and a small flue. The vortex street strong-mixing ammonia spraying device can improve the denitration efficiency, and is easy and convenient to adjust, simple in structure, low in cost, high in removal rate, clean and environmentally friendly.
Description
Technical field
The present invention relates to novel vortex street mixed ammonia-gas spraying device by force.
Background technology
At present, heavy duty boiler, flue gas of garbage furnace denitration generally adopts SCR (SCR) method, its cardinal principle adopts liquefied ammonia or ammoniacal liquor as reducing agent, spray in the flue of SCR reactor upstream after it is mixed with air, carry out reacting with the nitrogen oxide in flue gas under the effect of catalyst and generate harmless nitrogen and water in the ammonia-gas spraying device of selective catalytic reduction, wherein ammonia and flue gas mix and distributed effect is one of key factor affecting denitration efficiency, current ammonia mixes the equipment used with flue gas have nozzle ammonia-spraying grid and dalta wing.Two kinds of methods have its pluses and minuses.Nozzle ammonia-spraying grid regulates complicated, and rely on ammonia and mix with the spontaneous of flue gas, mixed effect is not good, and dalta wing cost is higher, and not enough to large flue mixed effect.。
Summary of the invention
Technical problem to be solved by this invention is to provide and a kind ofly can produces stable vortex street, strengthens flue gas disturbance, improves mixing of ammonia and flue gas, improves denitration efficiency, and cost is lower, regulate simple novel vortex street to mix ammonia-gas spraying device by force.
For solving the problems of the technologies described above, technical scheme of the present invention is: novel vortex street is mixed ammonia-gas spraying device by force, novel vortex street is mixed ammonia-gas spraying device by force, it is characterized in that: comprise several ammonia injection units be evenly arranged in flue, described ammonia injection unit comprises jet pipe, the cross section of described jet pipe is crescent, and the inner concave of described jet pipe is connected with defeated ammonia pipe between two parties, described jet pipe meet carry out outer convex surface from flow path direction to flue gas on be evenly provided with several ammonia-gas spraying devices.
As preferred technical scheme, described ammonia-gas spraying device comprises the spray orifice be located on described jet pipe, and described spray orifice is connected with nozzle pipe nipple, and described nozzle pipe nipple is provided with nozzle.
As preferred technical scheme, described nozzle is fan nozzle.
As preferred technical scheme, the length of described nozzle pipe nipple is 30mm-50mm.
As preferred technical scheme, described spray orifice is equidistantly arranged along the length direction of described jet pipe, and the size of the diameter of described spray orifice is roughly directly proportional to the mean flow rate of flue gas around described spray orifice.
As preferred technical scheme, the two ends of described jet pipe are cecum, and the bearing of trend of described jet pipe is perpendicular to the axis of described flue; Described jet pipe is welded by the ellipse arc stainless-steel sheet of two panels different curvature, and the length of described jet pipe is 80mm-200mm.
As preferred technical scheme, the longitudinal center cross section of the relatively described jet pipe of spray orifice described in several is symmetrical arranged, and the distance in the longitudinal center cross section of described spray orifice and described jet pipe and the pore size of described spray orifice are inversely proportional to.
As preferred technical scheme, described in adjacent two, the spacing of ammonia injection unit is 300mm-800mm.
As preferred technical scheme, described ammonia injection unit is provided with the control valve of regulating flow quantity.
As preferred technical scheme, the outer convex surface of described jet pipe is provided with center line and is positioned at first group of ammonia-gas spraying device on the longitudinal center cross section of described jet pipe and distinguishes the relatively described longitudinal center symmetrically arranged second group of ammonia-gas spraying device in cross section, the 3rd group of ammonia-gas spraying device and the 4th group of ammonia-gas spraying device, and described second group of ammonia-gas spraying device, the 3rd group of ammonia-gas spraying device and the 4th group of ammonia-gas spraying device are successively away from described first group of ammonia-gas spraying device; Described in several in described first group of ammonia-gas spraying device, described second group of ammonia-gas spraying device, described 3rd group of ammonia-gas spraying device and described 4th group of ammonia-gas spraying device, ammonia-gas spraying device distributes along the length direction of described jet pipe; The bearing of trend of described ammonia-gas spraying device is perpendicular to the outer convex surface of described jet pipe, the angle of cut of two central cross-sections in described second group of ammonia-gas spraying device is 48 °, the angle of cut of two central cross-sections in described 3rd group of ammonia-gas spraying device is 85 °, and the angle of cut of two central cross-sections in described 4th group of ammonia-gas spraying device is 104 °.
Operation principle of the present invention: the outer convex surface of jet pipe is provided with ammonia-gas spraying device, and outer convex surface is met and is carried out flow path direction to flue gas, the ammonia sprayed with ammonia-gas spraying device when flue gas flows through near ammonia-gas spraying device mixes, when mist departs from the convex outward of jet pipe, the toll bar whirlpool that the periodicity of Formation rule alternately comes off, form stable turbulent region, the object that ammonia mixes with flue gas can be reached within the extremely short time.
Owing to have employed technique scheme, the present invention can form stable vortex street, thus strengthens flue gas disturbance, can reduce the mixing length of ammonia and flue gas, all good mixed uniformly effect can be formed to large flue, bottom flue, better to the flue gas of large flue, ammonia mixed effect; The present invention can improve denitration efficiency, and regulates easy; Eliminate the turbulence structure and bracing means thereof set up in other denitrification apparatus, structure is simple, cost is lower, adjustment is simple simultaneously.The present invention can be used for removing the nitrogen oxide in the flue gases such as boiler, garbage combustion device, diesel engine, and clearance is high, clean environment firendly.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of ammonia injection unit in the embodiment of the present invention;
Fig. 3 is the top view of Fig. 2.
In figure: 1-flue; 2-ammonia injection unit; The defeated ammonia pipe of 3-; 4-the 3rd group of ammonia-gas spraying device; 5-second group of ammonia-gas spraying device; 6-first group of ammonia-gas spraying device; 7-the 4th group of ammonia-gas spraying device; 8-jet pipe; 9-nozzle pipe nipple; 10-nozzle.
Detailed description of the invention
As shown in Figure 1, Figure 2 and Figure 3, novel vortex street is mixed ammonia-gas spraying device by force, and comprise several ammonia injection units 2 be evenly arranged in flue 1, described in adjacent two, the spacing of ammonia injection unit 2 is 300mm-800mm.Described ammonia injection unit 2 is provided with the control valve of regulating flow quantity, is convenient to control gas flow.Described ammonia injection unit 2 comprises jet pipe 8, and the bearing of trend of described jet pipe 8, perpendicular to the axis of described flue 1, increases the projected area of jet pipe 8 on flue gas flow direction, increases contact surface.Described jet pipe 8 is welded by the ellipse arc stainless-steel sheet of two panels different curvature, and the length of described jet pipe 8 is 80mm-200mm.The two ends of described jet pipe 8 are cecum, and the cross section of described jet pipe 8 is crescent.The inner concave of described jet pipe 8 is connected with defeated ammonia pipe 3 between two parties, described jet pipe 8 meet carry out outer convex surface from flow path direction to flue gas on be evenly provided with several ammonia-gas spraying devices.Described ammonia-gas spraying device comprises the spray orifice be located on described jet pipe 8, and described spray orifice is connected with nozzle pipe nipple 9, and described nozzle pipe nipple 9 is provided with nozzle 10.Preferably, described nozzle 10 is the fan nozzle of 70/20 °.The length of described nozzle pipe nipple 9 is 30mm-50mm.
The Central Symmetry of the outer convex surface of the relatively described jet pipe 8 of ammonia-gas spraying device described in several is put.Described ammonia-gas spraying device is equidistantly arranged along the length direction of described jet pipe 8, and the size of the diameter of described spray orifice is roughly directly proportional to the mean flow rate of flue gas around described ammonia-gas spraying device.The outer convex surface of described jet pipe 8 is provided with center line and is positioned at first group of ammonia-gas spraying device 6 on the longitudinal center cross section of described jet pipe and distinguishes the relatively described longitudinal center symmetrically arranged second group of ammonia-gas spraying device 5 in cross section, the 3rd group of ammonia-gas spraying device 4 and the 4th group of ammonia-gas spraying device 7, and described second group of ammonia-gas spraying device 5, the 3rd group of ammonia-gas spraying device 4 and the 4th group of ammonia-gas spraying device 7 are successively away from described first group of ammonia-gas spraying device 6.Described in several in described first group of ammonia-gas spraying device 6, described second group of ammonia-gas spraying device 5, described 3rd group of ammonia-gas spraying device 4 and described 4th group of ammonia-gas spraying device 7, ammonia-gas spraying device distributes along the length direction of described jet pipe.The bearing of trend of described ammonia-gas spraying device is perpendicular to the outer convex surface of described jet pipe 8, the angle of cut of two central cross-sections in described second group of ammonia-gas spraying device 5 is 48 °, the angle of cut of two central cross-sections in described 3rd group of ammonia-gas spraying device 4 is 85 °, and the angle of cut of two central cross-sections in described 4th group of ammonia-gas spraying device 7 is 104 °.The aperture of the described spray orifice of described first group of ammonia-gas spraying device 6, described second group of ammonia-gas spraying device 5, described 3rd group of ammonia-gas spraying device 4 and described 4th group of ammonia-gas spraying device 7 diminishes gradually.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (10)
1. novel vortex street mixed ammonia-gas spraying device by force, it is characterized in that: comprise several ammonia injection units be evenly arranged in flue, described ammonia injection unit comprises jet pipe, the cross section of described jet pipe is crescent, the inner concave of described jet pipe is connected with defeated ammonia pipe between two parties, described jet pipe meet carry out outer convex surface from flow path direction to flue gas on be evenly provided with several ammonia-gas spraying devices.
2. according to novel vortex street according to claim 1 mixed ammonia-gas spraying device by force, it is characterized in that: described ammonia-gas spraying device comprises several and is located at spray orifice on described jet pipe, and described spray orifice is connected with nozzle pipe nipple, and described nozzle pipe nipple is provided with nozzle.
3., according to novel vortex street according to claim 2 mixed ammonia-gas spraying device by force, it is characterized in that: described nozzle is fan nozzle.
4., according to novel vortex street according to claim 2 mixed ammonia-gas spraying device by force, it is characterized in that: the length of described nozzle pipe nipple is 30mm-50mm.
5., according to novel vortex street according to claim 2 mixed ammonia-gas spraying device by force, it is characterized in that: spray orifice described in several is equidistantly arranged along the length direction of described jet pipe, the size of the diameter of described spray orifice is roughly directly proportional to the mean flow rate of flue gas around described spray orifice.
6. according to novel vortex street according to claim 2 mixed ammonia-gas spraying device by force, it is characterized in that: the longitudinal center cross section of the relatively described jet pipe of spray orifice described in several is symmetrical arranged, the distance in the longitudinal center cross section of described spray orifice and described jet pipe and the pore size of described spray orifice are inversely proportional to.
7. according to novel vortex street according to claim 1 mixed ammonia-gas spraying device by force, it is characterized in that: the two ends of described jet pipe are cecum, the bearing of trend of described jet pipe is perpendicular to the axis of described flue; Described jet pipe is welded by the ellipse arc stainless-steel sheet of two panels different curvature, and the length of described jet pipe is 80mm-200mm.
8., according to novel vortex street according to claim 1 mixed ammonia-gas spraying device by force, it is characterized in that: described in adjacent two, the spacing of ammonia injection unit is 300mm-800mm.
9., according to novel vortex street according to claim 1 mixed ammonia-gas spraying device by force, it is characterized in that: described ammonia injection unit is provided with the control valve of regulating flow quantity.
10. according to novel vortex street according to claim 1 mixed ammonia-gas spraying device by force, it is characterized in that: the outer convex surface of described jet pipe is provided with center line and is positioned at first group of ammonia-gas spraying device on the longitudinal center cross section of described jet pipe and distinguishes the relatively described longitudinal center symmetrically arranged second group of ammonia-gas spraying device in cross section, the 3rd group of ammonia-gas spraying device and the 4th group of ammonia-gas spraying device, and described second group of ammonia-gas spraying device, the 3rd group of ammonia-gas spraying device and the 4th group of ammonia-gas spraying device are successively away from described first group of ammonia-gas spraying device; Described in several in described first group of ammonia-gas spraying device, described second group of ammonia-gas spraying device, described 3rd group of ammonia-gas spraying device and described 4th group of ammonia-gas spraying device, ammonia-gas spraying device distributes along the length direction of described jet pipe; The bearing of trend of described ammonia-gas spraying device is perpendicular to the outer convex surface of described jet pipe, the angle of cut of two central cross-sections in described second group of ammonia-gas spraying device is 48 °, the angle of cut of two central cross-sections in described 3rd group of ammonia-gas spraying device is 85 °, and the angle of cut of two central cross-sections in described 4th group of ammonia-gas spraying device is 104 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610092161.7A CN105561783A (en) | 2016-02-19 | 2016-02-19 | Novel vortex street strong-mixing ammonia spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610092161.7A CN105561783A (en) | 2016-02-19 | 2016-02-19 | Novel vortex street strong-mixing ammonia spraying device |
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| Publication Number | Publication Date |
|---|---|
| CN105561783A true CN105561783A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610092161.7A Pending CN105561783A (en) | 2016-02-19 | 2016-02-19 | Novel vortex street strong-mixing ammonia spraying device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107096409A (en) * | 2017-05-10 | 2017-08-29 | 江苏天楹环保能源成套设备有限公司 | Diffraction mixing arrangement |
| CN108993143A (en) * | 2018-08-29 | 2018-12-14 | 哈尔滨锅炉厂有限责任公司 | Accumulatingdust multi-direction type ammonia injection apparatus for SCR denitration |
| CN110227342A (en) * | 2019-06-03 | 2019-09-13 | 北京中航泰达环保科技股份有限公司 | A kind of novel reverse streaming moving bed desulfuring and denitrifying apparatus and its smoke processing system |
| CN113559705A (en) * | 2021-08-05 | 2021-10-29 | 西安热工研究院有限公司 | Drainage type SCR denitration urea direct injection system |
-
2016
- 2016-02-19 CN CN201610092161.7A patent/CN105561783A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107096409A (en) * | 2017-05-10 | 2017-08-29 | 江苏天楹环保能源成套设备有限公司 | Diffraction mixing arrangement |
| CN108993143A (en) * | 2018-08-29 | 2018-12-14 | 哈尔滨锅炉厂有限责任公司 | Accumulatingdust multi-direction type ammonia injection apparatus for SCR denitration |
| CN110227342A (en) * | 2019-06-03 | 2019-09-13 | 北京中航泰达环保科技股份有限公司 | A kind of novel reverse streaming moving bed desulfuring and denitrifying apparatus and its smoke processing system |
| CN110227342B (en) * | 2019-06-03 | 2024-05-24 | 北京中航泰达环保科技股份有限公司 | Countercurrent moving bed desulfurization and denitrification device and flue gas treatment system thereof |
| CN113559705A (en) * | 2021-08-05 | 2021-10-29 | 西安热工研究院有限公司 | Drainage type SCR denitration urea direct injection system |
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Application publication date: 20160511 |
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