CN107999296A - The resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing - Google Patents
The resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing Download PDFInfo
- Publication number
- CN107999296A CN107999296A CN201711203802.2A CN201711203802A CN107999296A CN 107999296 A CN107999296 A CN 107999296A CN 201711203802 A CN201711203802 A CN 201711203802A CN 107999296 A CN107999296 A CN 107999296A
- Authority
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- China
- Prior art keywords
- nozzle
- outer nozzle
- resistance
- gas chamber
- inner nozzle
- Prior art date
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- Pending
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- 239000012530 fluid Substances 0.000 title claims abstract description 13
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 239000010425 asbestos Substances 0.000 claims description 4
- 229910052895 riebeckite Inorganic materials 0.000 claims description 4
- 238000005524 ceramic coating Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 22
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 17
- 230000003628 erosive effect Effects 0.000 description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000000889 atomisation Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 239000000908 ammonium hydroxide Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005439 thermosphere Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
-
- 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
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
-
- 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
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- 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)
- Nozzles (AREA)
Abstract
The invention belongs to SNCR denitration equipment technical field, more particularly to the resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing, the resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing, including inner nozzle, outer nozzle outside inner nozzle, inner nozzle front end is equipped with inner nozzle, outer nozzle front end is equipped with the outer nozzle being located at outside inner nozzle, outer nozzle front end is equipped with the opening for coordinating inner nozzle, outer nozzle rear portion is equipped with compressed air inlet, inner nozzle rear portion is equipped with reducing agent entrance, outer nozzle is equipped with the appearance gas chamber of ball-type at outer nozzle, hold gas chamber front end outer nozzle internal diameter and be less than appearance gas chamber rear end outer nozzle internal diameter, outer nozzle outer surface is equipped with refractory layer, refractory layer bottom is thermal insulation layer, injection pressure stability continues, atomizing effect is more preferable, spray gun is heat-resist, service life is grown.
Description
Technical field
The invention belongs to SNCR denitration equipment technical field, and in particular to the resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing.
Background technology
SNCR techniques are the most widely used technologies of denitration, mostly using ammonium hydroxide or using urea by becoming after dissolving
Ammonium hydroxide is evenly distributed in flue, in high temperature environments quickly by solution as reducing agent within the temperature range of 900 DEG C or so
Chemical reaction is completed, NOx is decomposed into generation nitrogen and water.Denitration efficiency can reach 50~75%, and some is even as high as 80%.
It is to generally acknowledge method of denitration the most successful in the world at present.
The atomizing effect of spray gun is one of core technology of SNCR techniques, to obtain preferable denitration effect, it is necessary to ammonia
Water is evenly distributed in flue at a suitable temperature, at suitable position, and the atomizing effect of spray gun is better, is more readily available
High denitration efficiency.Since the change of supply pressure can cause the effect of ammonia water spray during usual lance ejection ammonium hydroxide, cause mist
Change effect is poor, and the denitration effect of SNCR techniques declines, it is therefore desirable to which the supply pressure of spray gun is regulated and controled.The temperature of denitration
Between 850 DEG C~1150 DEG C, spray gun is under high temperature for a long time can cause spray gun temperature excessive, accelerate gun body aging, seriously
The service life of spray gun is influenced, and influences the use atomizing effect of spray gun, causes the denitration effect of SNCR techniques to decline.
The content of the invention
The technical problems to be solved by the invention are in view of the foregoing drawbacks, there is provided the resistance to thermal jet of SNCR denitration two-fluid voltage stabilizing
Rifle, injection pressure stability continue, and atomizing effect is more preferable, and spray gun is heat-resist, service life length.
It is as follows that the present invention solves the technical solution that its technical problem uses：
The resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing, including the outer nozzle outside inner nozzle, inner nozzle, inner nozzle front end are set
There is inner nozzle, outer nozzle front end is equipped with the outer nozzle being located at outside inner nozzle, and outer nozzle front end, which is equipped with, coordinates opening for inner nozzle
Mouthful, outer nozzle rear portion is equipped with compressed air inlet, and inner nozzle rear portion is equipped with reducing agent entrance, and outer nozzle is equipped with outer nozzle
The appearance gas chamber of ball-type, holds gas chamber front end outer nozzle internal diameter and is less than appearance gas chamber rear end outer nozzle internal diameter, outer nozzle outer surface is equipped with resistance to
Thermosphere, refractory layer bottom are thermal insulation layer, and compressed air, reducing agent respectively enter, former agent first time mist under the action of inner nozzle
Change, meanwhile, outer nozzle sprays compressed air, and compressed air makes the reducing agent after atomization be atomized again again, strengthens atomizing effect,
When compressed air moves flow forward in outer nozzle endoporus, flow to hold in gas chamber and collect, due to outer nozzle before and after appearance gas chamber
Internal diameter is inconsistent, and the internal diameter of front end is smaller, and air pressure rises in appearance gas chamber, is sprayed after pressurization, and keep certain pressure
Insist on continuous ejection, improve atomizing effect, improve denitration effect, the refractory layer outside outer nozzle has excellent heat resistance, avoids
The spray gun aging under 1000 DEG C or so of hot environment for a long time, while thermal insulation layer plays heat insulating function, refractory layer makes spray gun
High temperature is resistant to, thermal insulation layer completely cuts off high temperature outside, while protects spray gun from the erosion of high temperature, and extend spray gun uses the longevity
Life.
Further, the outer nozzle is overall package structure, and outer nozzle can avoid inner nozzle from being ground by flue gas erosion
Damage, prolongs the service life.
Further, it is taper to hold gas chamber front end outer nozzle inner wall, and the less one end of taper forward, further improves ejection
When speed, improve the effect of atomization.
Further, the refractory layer is heat resistant ceramic coatings, and heat-resisting layer thickness is 0.3-0.6mm, and heat-stable ceramic has
There is excellent heat resistance.
Further, the thermal insulation layer is asbestos layer, insulation thickness 0.2-0.5mm, and asbestos have excellent exhausted
Hot thermal insulation.
The beneficial effects of the invention are as follows：Using the above scheme, compressed air, reducing agent respectively enter, and strengthen atomizing effect,
Compressed air is held in gas chamber in outer nozzle and collects supercharging, keeps certain pressure, and keeps certain pressure persistently to spray, and improves
Atomizing effect, improves denitration effect, and the refractory layer of outer nozzle outer layer is combined with thermal insulation layer, reduces high temperature to greatest extent to spray gun
Erosion, extend the service life of spray gun.
Brief description of the drawings
By detailed description below in conjunction with the accompanying drawings, the present invention is foregoing will to be become with other objects, features and advantages
Obviously.
Fig. 1 is the cross section structure schematic diagram of the present invention.
Fig. 2 is the cross section structure schematic diagram of outer nozzle of the present invention.
Wherein：1 is inner nozzle, and 2 be outer nozzle, and 2.1 be refractory layer, and 2.2 be thermal insulation layer, and 3 be appearance gas chamber.
Embodiment
The resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing as shown in Figure 1 and Figure 2, including it is outer outside inner nozzle 1, inner nozzle 1
Jet pipe 2,1 front end of inner nozzle are equipped with inner nozzle, and 2 front end of outer nozzle is equipped with the outer nozzle being located at outside inner nozzle, before outer nozzle
End is equipped with the opening for coordinating inner nozzle, and outer nozzle, which is located at outside inner nozzle, avoids flue gas erosion from wearing, and avoids smoke-shock pair
The influence of atomizing effect, 2 rear portion of outer nozzle are equipped with compressed air inlet, and 1 rear portion of inner nozzle is equipped with reducing agent entrance, outer nozzle 1
The appearance gas chamber 3 of ball-type is equipped with outer nozzle, holds 3 front end outer nozzle internal diameter of gas chamber and is less than appearance gas chamber rear end outer nozzle internal diameter,
Compressed air, reducing agent respectively enter, and former agent is atomized for the first time under the action of inner nozzle, meanwhile, it is empty that outer nozzle sprays compression
Gas, compressed air make the reducing agent after atomization be atomized again again, strengthen atomizing effect, compressed air is in 2 endoporus of outer nozzle
When moving flow forward, flow to hold in gas chamber and collect, since outer nozzle internal diameter is inconsistent before and after holding gas chamber, the internal diameter of front end compared with
Small, air pressure rises in appearance gas chamber, is sprayed after pressurization, and keeps certain pressure persistently to spray, and improves atomizing effect,
The inner wall for holding 3 front end outer nozzle 2 of gas chamber is taper, and the less one end of taper forward, further improves speed during ejection, into one
Step improves the effect of atomization, greatly improves denitration effect, outer nozzle 2 is overall package structure, and outer nozzle 2 can avoid interior spray
Pipe 1 is worn by flue gas erosion, and 2 outer surface of outer nozzle is equipped with the refractory layer 2.1 of 0.5mm thickness, and refractory layer 2.1 is heat-stable ceramic layer,
2.1 bottom of refractory layer is thermal insulation layer 2.2, and thermal insulation layer 2.2 is the asbestos layer of 0.5mm thickness, and the refractory layer outside outer nozzle 2 is with excellent
Good heat resistance, the aging for avoiding spray gun from being in for a long time under 1000 DEG C or so of hot environment, while thermal insulation layer 2.2 rise heat-insulated
Function, refractory layer 2.1 make spray gun be resistant to high temperature, and thermal insulation layer 2.2 completely cuts off high temperature outside, while protects spray gun invading from high temperature
Erosion, extends the service life of spray gun.
The above, is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is every according to
Any simply modification, the equivalent variations made in technical spirit according to the present invention to above example, each fall within the guarantor of the present invention
Within the scope of shield.
Claims (5)
- The resistance to thermic lance of 1.SNCR denitration two-fluid voltage stabilizings, it is characterised in that：It is interior including the outer nozzle outside inner nozzle, inner nozzle Jet pipe front end is equipped with inner nozzle, and outer nozzle front end is equipped with the outer nozzle being located at outside inner nozzle, and outer nozzle front end, which is equipped with, to be coordinated The opening of inner nozzle, outer nozzle rear portion are equipped with compressed air inlet, and inner nozzle rear portion is equipped with reducing agent entrance, and outer nozzle is close to outer The appearance gas chamber of ball-type is equipped with nozzle, appearance gas chamber front end outer nozzle internal diameter, which is less than, holds gas chamber rear end outer nozzle internal diameter, outside outer nozzle Surface is equipped with refractory layer, and refractory layer bottom is thermal insulation layer.
- 2. the resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing according to claim 1, it is characterised in that：The outer nozzle is Overall package structure.
- 3. the resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing according to claim 1, it is characterised in that：Hold and sprayed outside gas chamber front end Inside pipe wall is taper, and the less one end of taper is forward.
- 4. the resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing according to claim 1, it is characterised in that：The refractory layer is Heat resistant ceramic coatings, heat-resisting layer thickness are 0.3-0.6mm.
- 5. the resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing according to claim 1, it is characterised in that：The thermal insulation layer is Asbestos layer, insulation thickness 0.2-0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203802.2A CN107999296A (en) | 2017-11-27 | 2017-11-27 | The resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203802.2A CN107999296A (en) | 2017-11-27 | 2017-11-27 | The resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107999296A true CN107999296A (en) | 2018-05-08 |
Family
ID=62053917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711203802.2A Pending CN107999296A (en) | 2017-11-27 | 2017-11-27 | The resistance to thermic lance of SNCR denitration two-fluid voltage stabilizing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107999296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672122A (en) * | 2018-07-24 | 2018-10-19 | 河北睿索固废工程技术研究院有限公司 | A kind of metal sealing antiseep sector super-fine atomization denitration spray gun |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293182Y (en) * | 1997-06-12 | 1998-10-07 | 防城港市海洋科技开发中心 | Jet-flow self-sucking automatic aerator |
| JP2005238019A (en) * | 2004-02-24 | 2005-09-08 | Osaka Gas Co Ltd | Two fluid nozzle structure |
| WO2009048452A1 (en) * | 2007-10-13 | 2009-04-16 | Neema Hekmat | Open lumen air filtration for liquid lines |
| CN201445912U (en) * | 2009-08-07 | 2010-05-05 | 华南理工大学 | Combined atomizing nozzle suitable for selective non-catalytic reduction |
| CN202638273U (en) * | 2012-06-11 | 2013-01-02 | 杭州浙大天元科技有限公司 | Low-gas-consumption bubble atomizing spray gun suitable for selective non-catalytic reduction (SNCR) denitration technology |
| CN103418517A (en) * | 2013-08-16 | 2013-12-04 | 苏州市东立机械有限公司 | Gas mixing nozzle |
| CN103587026A (en) * | 2013-11-06 | 2014-02-19 | 宁夏新航能源环境科技有限公司 | Energy-saving plastic injection gun |
| CN205528977U (en) * | 2016-04-14 | 2016-08-31 | 国家电网公司 | Corrosion resistant ground net cermet coating material's preparation facilities |
-
2017
- 2017-11-27 CN CN201711203802.2A patent/CN107999296A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293182Y (en) * | 1997-06-12 | 1998-10-07 | 防城港市海洋科技开发中心 | Jet-flow self-sucking automatic aerator |
| JP2005238019A (en) * | 2004-02-24 | 2005-09-08 | Osaka Gas Co Ltd | Two fluid nozzle structure |
| WO2009048452A1 (en) * | 2007-10-13 | 2009-04-16 | Neema Hekmat | Open lumen air filtration for liquid lines |
| CN201445912U (en) * | 2009-08-07 | 2010-05-05 | 华南理工大学 | Combined atomizing nozzle suitable for selective non-catalytic reduction |
| CN202638273U (en) * | 2012-06-11 | 2013-01-02 | 杭州浙大天元科技有限公司 | Low-gas-consumption bubble atomizing spray gun suitable for selective non-catalytic reduction (SNCR) denitration technology |
| CN103418517A (en) * | 2013-08-16 | 2013-12-04 | 苏州市东立机械有限公司 | Gas mixing nozzle |
| CN103587026A (en) * | 2013-11-06 | 2014-02-19 | 宁夏新航能源环境科技有限公司 | Energy-saving plastic injection gun |
| CN205528977U (en) * | 2016-04-14 | 2016-08-31 | 国家电网公司 | Corrosion resistant ground net cermet coating material's preparation facilities |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672122A (en) * | 2018-07-24 | 2018-10-19 | 河北睿索固废工程技术研究院有限公司 | A kind of metal sealing antiseep sector super-fine atomization denitration spray gun |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180508 |
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