CN104492628A - Spray gun special for coal powder boiler - Google Patents
Spray gun special for coal powder boiler Download PDFInfo
- Publication number
- CN104492628A CN104492628A CN201510026118.6A CN201510026118A CN104492628A CN 104492628 A CN104492628 A CN 104492628A CN 201510026118 A CN201510026118 A CN 201510026118A CN 104492628 A CN104492628 A CN 104492628A
- Authority
- CN
- China
- Prior art keywords
- gun barrel
- liquid
- atomizing air
- die cavity
- powder boiler
- 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.)
- Pending
Links
Classifications
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- 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
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- 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
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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
- B05B7/0441—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 with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
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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
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
Abstract
The invention provides a spray gun special for a coal powder boiler. The spray gun special for the coal powder boiler comprises a liquid inlet, an atomizing air inlet, a gun barrel, nozzles, an atomizing air cavity and a liquid cavity, wherein the liquid inlet is welded at the left end of the gun barrel, the atomizing air inlet is welded above the gun barrel, the nozzles are distributed on the outer circle of the gun barrel along the circumferential direction, the gun barrel is designed in a cone shape, a taper degree of the gun barrel ranges from 5 degrees to 15 degrees, the gun barrel comprises an atomizing air pipe and a liquid pipe, and the atomizing air pipe is coaxially inlaid on the outer circle of the liquid pipe so as to form an integral structure of the gun barrel, and thereby improves mechanical strength of components. According to the spray gun special for the coal powder boiler, the atomizing air cavity is welded on the atomizing air pipe, the liquid cavity and the atomizing air cavity are coaxially welded on the liquid pipe, the nozzles are connected with the atomizing air cavity and the liquid cavity in threaded mode, an interval between each two adjacent nozzles in the length direction of the gun barrel ranges from 0.5m to 0.8m, and the number of the nozzles arranged in the circumferential direction of the gun barrel is 1-4. The spray gun special for the coal powder boiler can perform multiple angle, long distance, equal flow and multiple point ejection, mixes a reducing agent with nitrogen oxide in smoke fully, and achieves an efficient nitrate removing purpose.
Description
Technical field
The present invention relates to coal-fired industrial furnace gas denitrifying technology, be specifically related to a kind of coal-powder boiler spray gun special, can multi-angle, long distance, etc. flow, multi-point injection.
Background technology
Nitrogen oxide (NO is all contained in coal-fired industrial furnace flue gas
x).NO
xa kind of main atmosphere pollution, NO
xphotochemical pollution can be caused under high light effect with hydrocarbon, be discharged into the NO in air
xthe main cause forming acid rain, serious harm ecological environment.SNCR denitrating flue gas (SNCR), because its technique is simple, reduced investment, has become one of important denitration method for flue gas.Its method is: under compressed-air actuated effect, by ammoniacal liquor (reducing agent) by being sprayed onto in stove high-temperature flue gas after the atomization of biphase gas and liquid flow spray gun, ammonia in ammoniacal liquor and the reaction of nitrogen oxides in flue gas, generate nitrogen and water, nitrogen oxides in effluent removed.
Biphase gas and liquid flow after atomization must have enough energy, just precalculated position can be sprayed onto, ensure denitration efficiency, but because Pulverized Fuel Boiler Furnace sectional dimension is large, velocity of flue gas is fast, flame height is high, temperature field is complicated, liquid kinetic energy deficiency after the atomization of common wall-spray gun is caused to reach precalculated position, major part ammonia is all often along hearth wall along with flue gas is drained, and fully can not mix, cannot carry out denitration reaction with the nitrogen oxide in flue gas, cause the escaping of ammonia too high, low temperature air preheater is damaged.
Summary of the invention
Technical problem to be solved by this invention is, for the deficiencies in the prior art, provide a kind of coal-powder boiler spray gun special, can multi-angle, long distance, etc. flow, multi-point injection, nitrogen oxide in reducing agent and flue gas is fully mixed, reaches the object of NO_x Reduction by Effective.
The technical scheme that the present invention adopts for its technical problem of solution comprises: liquid-inlet, diffusing air-hole, gun barrel, nozzle, atomizing air die cavity, liquid die cavity.Liquid-inlet is welded on the left end of gun barrel, and diffusing air-hole is welded on the top of gun barrel, and nozzle circumference is distributed in gun barrel outer ring.
Above-mentioned gun barrel is taper designs, and tapering is 5 ° ~ 15 °, comprises atomized air tube and liquid line, and atomized air tube is coaxially bushed in liquid line outer ring, forms gun barrel overall structure, increases component mechanical strength.
Above-mentioned atomizing air die cavity is welded in atomized air tube, and liquid die cavity and atomizing air die cavity weld coaxial welding on liquid line, and nozzle is connected with atomizing air die cavity and liquid die cavity by the mode of screw thread.
Said nozzle front end is processed with the axial aperture of difformity and dimensional requirement, controls spray shapes.Nozzle spacing on barrel length direction is 0.5 meter ~ 0.8 meter, circumferentially has 1 ~ 4 at gun barrel.
During work, atomizing air and liquid reducer access atomizing air interface, the liquid reducer interface of spray gun respectively, be assigned to atomizing air die cavity and liquid die cavity by atomized air tube and liquid line, two-phase flow fully mixes in the nozzle be attached thereto, carry out energy exchange and atomization.
The invention has the beneficial effects as follows: due to the taper designs of gun barrel, ensure that each nozzle emitted dose is equal, and multiple nozzles that barrel length direction is designed form spraying grid, nozzle in gun barrel circumference realizes multi-point injection, fully mix with the nitrogen oxide in flue gas, substantially increase denitration efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is cross-sectional view of the present invention.
In figure, 1 be liquid-inlet, 2 be diffusing air-hole, 3 for gun barrel, 3-1 be atomized air tube, 3-2 is for being nozzle for liquid line, 4,5 being atomizing air die cavity, 6 being liquid die cavity.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
This specific embodiment provides a kind of coal-powder boiler spray gun special to comprise: liquid-inlet 1, diffusing air-hole 2, gun barrel 3, nozzle 4, atomizing air die cavity 5, liquid die cavity 6.Liquid-inlet 1 is welded on the left end of gun barrel 3, and diffusing air-hole 2 is welded on the top of gun barrel 3, and nozzle 4 circumference is distributed in gun barrel 3 outer ring.
Above-mentioned gun barrel 3 is in taper designs, and tapering is 10 °, comprises atomized air tube 3-1 and liquid line 3-2, atomized air tube 3-1 are coaxially bushed in liquid line 3-2 outer ring, forms gun barrel 3 overall structure, increases component mechanical strength.
Above-mentioned atomizing air die cavity weldering 5 is connected on atomized air tube 3-1, and liquid-type 6 chamber and atomizing air die cavity 5 coaxial welding are on liquid line 3-2, and nozzle 4 is connected with atomizing air die cavity 5 and liquid die cavity 6 by the mode of screw thread.
Said nozzle 4 front end is processed with the axial aperture of difformity and dimensional requirement, controls spray shapes.Nozzle 4 spacing on gun barrel 3 length direction is 0.75 meter, circumferentially has 2 at gun barrel.
During work, atomizing air and liquid reducer access atomizing air interface, the liquid reducer interface of spray gun respectively, be assigned to atomizing air die cavity and liquid die cavity by atomized air tube and liquid line, two-phase flow fully mixes in the nozzle be attached thereto, carry out energy exchange and atomization.
Claims (4)
1. a coal-powder boiler spray gun special, comprise liquid-inlet, diffusing air-hole, gun barrel, nozzle, liquid-inlet is welded on the left end of gun barrel, diffusing air-hole is welded on the top of gun barrel, nozzle circumference is distributed in gun barrel outer ring, it is characterized in that: also comprise atomizing air die cavity, liquid die cavity, atomizing air die cavity is welded in atomized air tube, liquid die cavity and atomizing air die cavity weld coaxial welding on liquid line, and nozzle is connected with atomizing air die cavity and liquid die cavity by the mode of screw thread.
2. a kind of coal-powder boiler spray gun special according to claim 1, it is characterized in that: described gun barrel is taper designs, tapering is 5 ° ~ 15 °.
3. a kind of coal-powder boiler spray gun special according to claim 1, is characterized in that: described nozzle spacing on barrel length direction is 0.5 meter ~ 0.8 meter, circumferentially has 1 ~ 4 at gun barrel.
4. any one coal-powder boiler spray gun special according to claim 1 or 2, it is characterized in that: described gun barrel comprises atomized air tube and liquid line, atomized air tube is coaxially bushed in liquid line outer ring, forms gun barrel overall structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026118.6A CN104492628A (en) | 2015-01-20 | 2015-01-20 | Spray gun special for coal powder boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026118.6A CN104492628A (en) | 2015-01-20 | 2015-01-20 | Spray gun special for coal powder boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104492628A true CN104492628A (en) | 2015-04-08 |
Family
ID=52934130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510026118.6A Pending CN104492628A (en) | 2015-01-20 | 2015-01-20 | Spray gun special for coal powder boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104492628A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000706A (en) * | 2016-07-25 | 2016-10-12 | 西安航天源动力工程有限公司 | Desulfurization waste water multi-nozzle long-gun ejector |
-
2015
- 2015-01-20 CN CN201510026118.6A patent/CN104492628A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000706A (en) * | 2016-07-25 | 2016-10-12 | 西安航天源动力工程有限公司 | Desulfurization waste water multi-nozzle long-gun ejector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |
|
| WD01 | Invention patent application deemed withdrawn after publication |