CN103506234B - A kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology - Google Patents
A kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology Download PDFInfo
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- CN103506234B CN103506234B CN201310446280.4A CN201310446280A CN103506234B CN 103506234 B CN103506234 B CN 103506234B CN 201310446280 A CN201310446280 A CN 201310446280A CN 103506234 B CN103506234 B CN 103506234B
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- 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
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0491—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid the liquid and the gas being mixed at least twice along the flow path of the liquid
-
- 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
- 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
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
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- 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
A kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology, spray gun is by central-injection pipe, outer annular playpipe, center hybrid chamber and outer hybrid chamber composition, it is characterized in that, spray technology is that the compressed air carrying the reducing agent that enters of pipeline section and blowpipe section to enter by reducing agent mixes at the first hybrid chamber, and most of gas-liquid mixture enters central-injection pipe, sprays in smoke treatment through central-injection mouth; The gas-liquid mixture of part first hybrid chamber enters the second hybrid chamber by unilaterally connected pipeline, the Partial shrinkage air that blowpipe section enters is without the first hybrid chamber, directly enter the second hybrid chamber by connecting pipeline, the gas-liquid mixture of the second hybrid chamber sprays in smoke treatment through outer annular playpipe.Advantage is, adopt two-chamber mixing can obtain reducing agent, compressed air different component two kinds of gas-liquid mixtures to complete different jeting effects, bilayer sleeve can prevent two kinds of gas-liquid mixtures from influencing each other.
Description
Technical field
The invention belongs to the method for purifying exhaust air, relate to SNCR denitration (SNCR) applied technical field, be specifically related to a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology.
Background technology
At atmosphere pollution species, nitrogen oxide is a kind of pollutant being subject to recently greatly paying close attention to.For the nitrogen oxide that cement industry and recirculating fluidized bed discharge, technology feasible at present comprises the technology such as SNCR denitration SNCR, selective-catalytic-reduction denitrified SCR and low NO.Wherein, SNCR its higher denitration efficiency and invest low feature and become the most widely used technology.
For the denitration efficiency of SNCR technique, its major influence factors comprises reaction time and the extent of reaction, and the core process affecting this factor is exactly the performance of spray gun, because spray gun belongs to by limit wall to central-injection, therefore spray gun needs enough penetrability, ensure that reducing agent can arrive center, secondly the injection of spray gun needs to have enough degrees of scatter, can mix fast with flue gas and can carry out large-area covering.Conventional lance is difficult to both meet enough penetration powers, has again good atomizing effect.As a kind of SNCR denitration technique spray gun special (publication number: 103170231A), its inventive point is mainly seeking better atomizing effect, and required higher penetrability when not considering actual use.As the SNCR swirling flow atomizing spray gun (publication number: 103230740A) with bluff body device, its invention carrys out nominal price disturbance by increasing eddy flow district, improves mixing condition, and it focuses on point also mainly at lifting mixed effect, and does not improve penetrability.
Summary of the invention
The object of the invention is to overcome the weak point in prior art, provide a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology, this technique can make spray gun both have high-penetrability, can realize strong atomizing effect again.
For achieving the above object, the present invention is by the following technical solutions:
A kind of SNCR denitrating flue gas spray gun and two-chamber hybrid double-layer spray technology thereof, this technique is by central-injection pipe, outer annular playpipe, reducing agent conveying pipeline section, blowpipe section forms, central-injection pipe front end is provided with central-injection mouth, rear end is provided with the first hybrid chamber and reducing agent carries pipeline section and blowpipe section, between blowpipe section and the first hybrid chamber, be provided with transfer pipeline, the sidewall of transfer pipeline is provided with connecting pipeline and is communicated with the second hybrid chamber of outer annular playpipe; It is peripheral that outer annular playpipe is located at central-injection pipe, and front end is provided with annular spray mouth, and rear end is provided with the second hybrid chamber, is provided with unilaterally connected pipeline between the second hybrid chamber and the first hybrid chamber of central-injection pipe; Be provided with reducing agent flow control valve and Pressure gauge at reducing agent conveying pipeline section, be provided with air velocity control valve and Pressure gauge in blowpipe section.
A kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology, its spray technology is, the compressed air that the reducing agent carrying pipeline section to enter by reducing agent and blowpipe section enter mixes at the first hybrid chamber, major part gas-liquid mixture enters central-injection pipe, sprays in smoke treatment through central-injection mouth;
The gas-liquid mixture of part first hybrid chamber enters the second hybrid chamber by unilaterally connected pipeline, the Partial shrinkage air that blowpipe section enters is without the first hybrid chamber, directly enter the second hybrid chamber by connecting pipeline, the gas-liquid mixture of the second hybrid chamber sprays in smoke treatment to annular spray mouth through outer annular playpipe.
The aperture of the connecting pipeline that the sidewall of transfer pipeline between blowpipe section and the first hybrid chamber as above is provided with and the aperture of transfer pipeline that is provided with between blowpipe section and the first hybrid chamber are than being 0.3-0.42.
The aperture of central-injection pipe as above and the aperture of unilaterally connected pipeline that is provided with between the second hybrid chamber and the first hybrid chamber are than being 0.5-0.58.
Compressed air inlet pressure regulation spectrum is 0.2-0.35MPa.
First hybrid chamber consists of reducing agent and compressed air, second hybrid chamber consists of gas-liquid mixture and the compressed air of the first hybrid chamber, adopt two-chamber mixing can obtain reducing agent, compressed air different component two kinds of gas-liquid mixtures to complete different jeting effects, bilayer sleeve effectively can utilize the feature that in two hybrid chambers, gas-liquid mixture component is different, prevents two kinds of gas-liquid mixtures from influencing each other.
This technique arranges two hybrid chambers, and two hybrid chambers adopt split-type design, cannot bidirectional circulating between two chambeies, in gas-liquid mixture in two hybrid chambers, reducing agent is different with compressed-air actuated ratio, can realize the penetration power that gas-liquid mixture in the first hybrid chamber can provide stronger, the atomization that the second hybrid chamber is stronger because tolerance has more.
Two hybrid chambers are adopted to produce constituent content different two kinds of reducing agents, compressed air mixture in the technical program.Reducing agent enters the first hybrid chamber by reducing agent conveying pipeline section, and compressed air enters the first hybrid chamber by compressed air pipeline section part, and a part enters the second hybrid chamber in addition.Reducing agent and compressed air carry out mixing rear section and directly spray in flue gas by central-injection mouth, and part enters the second hybrid chamber and again mixes with compressed air, and reducing agent, the compressed air of the second hybrid chamber are directly sprayed in flue gas by annular spray mouth.Reducing agent in second hybrid chamber, compressed air are compared with the first hybrid chamber, and its compressed air content is higher, and its object is mainly better to be atomized reducing agent, coordinate annular spray mouth to promote the dispersiveness of gas-liquid mixture simultaneously.
Bilayer sleeve injection equipment is adopted in the technical program.Corresponding first hybrid chamber of central-injection pipe, corresponding second hybrid chamber of annular spray pipe, central-injection pipe and annular spray pipe are without connected component.
By the aperture ratio of adjustment distribution lines in the technical program, reducing agent and compressed-air actuated ratio in gas and liquid mixture can be regulated in the first hybrid chamber and the second hybrid chamber, thus meets different operating modes.
Beneficial effect: compared with prior art, the present invention has the following advantages: this technique is containing two hybrid chambers, and two hybrid chambers adopt split-type design, cannot bidirectional circulating between two chambeies, make reducing agent in the gas-liquid mixture in two hybrid chambers different with compressed-air actuated ratio.In order to ensure that the gas-liquid mixture satisfied requirement separately all the time in two hybrid chambers is sprayed, both do not mix, and have employed two hybrid chambers that the corresponding component of double-layer injection is different.By adjusting the aperture ratio of connecting pipeline, reducing agent and compressed-air actuated ratio in gas and liquid mixture can be regulated in the first hybrid chamber and the second hybrid chamber.
Adopt two-chamber mixing can obtain reducing agent, compressed air different component two kinds of gas-liquid mixtures to complete different jeting effects, bilayer sleeve injection equipment effectively can utilize the feature that in two hybrid chambers, gas-liquid mixture component is different, prevents two kinds of gas-liquid mixtures from influencing each other.
Accompanying drawing explanation
Fig. 1 is the organigram of a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology of the present invention
Fig. 2 A is the second hybrid chamber and outlet connections position structure signal enlarged drawing thereof in the present invention
Fig. 2 B is that in the present invention, the second hybrid chamber and compressed air branch pipeline section connecting portion construct and illustrate enlarged drawing
Fig. 3 is the workflow diagram of a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology of the present invention
In figure, 1-reducing agent conveying pipeline section, 2-blowpipe section, 3-transfer pipeline, 4-connecting pipeline, 5-outer annular playpipe, 6-annular spray mouth, 7-central-injection mouth, 8-central-injection pipe, 9-second hybrid chamber, 10-unilaterally connected pipeline, 11-first hybrid chamber,
-the first hybrid chamber reducing agent, compressed air,
-the second hybrid chamber reducing agent, compressed air,
-reducing agent,
-compressed air.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology, by central-injection pipe, outer annular playpipe, reducing agent conveying pipeline section, blowpipe section forms, central-injection pipe 8 front end is provided with central-injection mouth 7, rear end is provided with the first hybrid chamber 11 and reducing agent carries pipeline section 1 and blowpipe section 2, between blowpipe section 2 and the first hybrid chamber 11, be provided with transfer pipeline 3, the sidewall of transfer pipeline 3 is provided with connecting pipeline 4 and is communicated with the second hybrid chamber 9 of outer annular playpipe; It is peripheral that outer annular playpipe 5 is located at central-injection pipe 8, and front end is provided with annular spray mouth 6, and rear end is provided with between the second hybrid chamber 9, second hybrid chamber and the first hybrid chamber of central-injection pipe and is provided with unilaterally connected pipeline 10; Be provided with reducing agent flow control valve and Pressure gauge at reducing agent conveying pipeline section, be provided with air velocity control valve and Pressure gauge in blowpipe section.
As shown in Fig. 2 A, 2B, second hybrid chamber 9 is the cavity of ring central-injection pipe 8, reducing agent in second hybrid chamber 9, compressed air do not contact with the reducing agent in central-injection pipe 8, compressed air, and the reducing agent in the second hybrid chamber 9, compressed air directly enter outer annular playpipe 5.Because central-injection pipe 8 and outer annular playpipe 5 are respectively from the second hybrid chamber 9 and the first hybrid chamber 11, and the reducing agent in two systems, compressed-air actuated concrete component are different, therefore create the reducing agent of central-injection pipe 8, feature that compressed air has more strong penetrating power, outer annular playpipe 5 is then because in the second hybrid chamber 9, air supply makes more greatly its reducing agent, compressed air has more dispersiveness.
As shown in Figure 3, the two-chamber hybrid double-layer spray technology of SNCR denitrating flue gas spray gun, the compressed air that the reducing agent carrying pipeline section 1 to enter by reducing agent and blowpipe section 2 enter mixes at the first hybrid chamber 11, major part gas-liquid mixture enters central-injection pipe 8, sprays in smoke treatment through central-injection mouth 7; The gas-liquid mixture of part first hybrid chamber 11 enters the second hybrid chamber 9 by unilaterally connected pipeline 10, the Partial shrinkage air that blowpipe section 2 enters is without the first hybrid chamber, the gas-liquid mixture directly entering the second hybrid chamber 9, second hybrid chamber 9 by connecting pipeline 4 sprays in smoke treatment through outer annular playpipe 5 to annular spray mouth 6.
Arrow specifies the flow direction of reducing agent, compressed air, the first hybrid chamber gas-liquid mixture and the second hybrid chamber gas-liquid mixture respectively, and the reducing agent of entrance and compressed air enter the first hybrid chamber, enter central-injection pipe after sufficiently mixing.The Partial shrinkage air that in second hybrid chamber, the gas-liquid mixture consisting of the first hybrid chamber of gas-liquid mixture and compressed air inlet enter.The component difference of two hybrid chambers also caused by import thing qualitative difference.
The aperture of the connecting pipeline 4 that the sidewall of transfer pipeline between blowpipe section and the first hybrid chamber as above is provided with and the aperture of transfer pipeline 3 that is provided with between blowpipe section and the first hybrid chamber are than being 0.3-0.42.
The aperture of central-injection pipe 8 as above and the aperture of unilaterally connected pipeline 10 that is provided with between the second hybrid chamber and the first hybrid chamber are than being 0.5-0.58.
Compressed air inlet pressure regulation spectrum is 0.2-0.35MPa.
In sum, the present invention can effectively be applicable to SNCR denitration technique, can meet the penetration power needed for technique, can form good dispersive property again.
Claims (5)
1. a SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology, spray gun is by central-injection pipe, outer annular playpipe, reducing agent conveying pipeline section, blowpipe section forms, it is characterized in that, central-injection pipe front end is provided with central-injection mouth, rear end is provided with the first hybrid chamber and reducing agent carries pipeline section and blowpipe section, between blowpipe section and the first hybrid chamber, be provided with transfer pipeline, the sidewall of transfer pipeline is provided with connecting pipeline and is communicated with the second hybrid chamber of outer annular playpipe; It is peripheral that outer annular playpipe is located at central-injection pipe, and front end is provided with annular spray mouth, and rear end is provided with the second hybrid chamber, is provided with unilaterally connected pipeline between the second hybrid chamber and the first hybrid chamber of central-injection pipe; Be provided with reducing agent flow control valve and Pressure gauge at reducing agent conveying pipeline section, be provided with air velocity control valve and Pressure gauge in blowpipe section.
2. a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology according to claim 1, it is characterized in that: the reducing agent that spray technology carries pipeline section (1) to enter by reducing agent and the compressed air that blowpipe section (2) enters mix at the first hybrid chamber (11), major part gas-liquid mixture enters central-injection pipe (8), sprays in smoke treatment through central-injection mouth (7);
The gas-liquid mixture of part first hybrid chamber (11) enters the second hybrid chamber (9) by unilaterally connected pipeline (10), the Partial shrinkage air that blowpipe section (2) enters is without the first hybrid chamber, directly enter the second hybrid chamber (9) by connecting pipeline (4), the gas-liquid mixture of the second hybrid chamber (9) sprays in smoke treatment to annular spray mouth (6) through outer annular playpipe (5).
3. a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology according to claim 1, is characterized in that: the aperture of the connecting pipeline that the sidewall of the transfer pipeline between blowpipe section and the first hybrid chamber is provided with and the aperture of transfer pipeline that is provided with between blowpipe section and the first hybrid chamber are than being 0.3-0.42.
4. a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology according to claim 1, is characterized in that, the aperture of central-injection pipe and the aperture of unilaterally connected pipeline that is provided with between the second hybrid chamber and the first hybrid chamber are than being 0.5-0.58.
5. a kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology according to claim 1, it is characterized in that, compressed air inlet pressure regulation spectrum is 0.2-0.35MPa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310446280.4A CN103506234B (en) | 2013-09-27 | 2013-09-27 | A kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310446280.4A CN103506234B (en) | 2013-09-27 | 2013-09-27 | A kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology |
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| Publication Number | Publication Date |
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| CN103506234A CN103506234A (en) | 2014-01-15 |
| CN103506234B true CN103506234B (en) | 2016-03-16 |
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| CN201310446280.4A Expired - Fee Related CN103506234B (en) | 2013-09-27 | 2013-09-27 | A kind of SNCR denitrating flue gas spray gun two-chamber hybrid double-layer spray technology |
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| CN113975949B (en) * | 2021-12-28 | 2022-03-08 | 山东东源新材料科技有限公司 | Flue gas denitration device in petrochemical industry and use method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4434942A1 (en) * | 1994-09-30 | 1996-04-04 | Noell Abfall & Energietech | Flue gas treatment |
| DE102006001319A1 (en) * | 2006-01-09 | 2007-07-12 | Wurz, Dieter, Prof. Dr.-Ing. | Two-fluid nozzle with Lavalcharekteristik and with pre-division in the liquid supply |
| CN101287555A (en) * | 2005-10-07 | 2008-10-15 | 迪特尔·沃尔兹 | Atomizing nozzle for two substances |
| 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 |
| CN102728208A (en) * | 2012-07-20 | 2012-10-17 | 湖南安普诺环保科技有限公司 | SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU736656B2 (en) * | 1997-05-01 | 2001-08-02 | E.I. Du Pont De Nemours And Company | Spray nozzle and a process using this nozzle |
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2013
- 2013-09-27 CN CN201310446280.4A patent/CN103506234B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4434942A1 (en) * | 1994-09-30 | 1996-04-04 | Noell Abfall & Energietech | Flue gas treatment |
| CN101287555A (en) * | 2005-10-07 | 2008-10-15 | 迪特尔·沃尔兹 | Atomizing nozzle for two substances |
| DE102006001319A1 (en) * | 2006-01-09 | 2007-07-12 | Wurz, Dieter, Prof. Dr.-Ing. | Two-fluid nozzle with Lavalcharekteristik and with pre-division in the liquid supply |
| 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 |
| CN102728208A (en) * | 2012-07-20 | 2012-10-17 | 湖南安普诺环保科技有限公司 | SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment |
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