CN203678564U - Double-fluid spray gun for SNCR (selective non-catalytic reduction) denitration reaction - Google Patents
Double-fluid spray gun for SNCR (selective non-catalytic reduction) denitration reaction Download PDFInfo
- Publication number
- CN203678564U CN203678564U CN201320866130.4U CN201320866130U CN203678564U CN 203678564 U CN203678564 U CN 203678564U CN 201320866130 U CN201320866130 U CN 201320866130U CN 203678564 U CN203678564 U CN 203678564U
- Authority
- CN
- China
- Prior art keywords
- outer tube
- spray gun
- fluid spray
- torch
- reducing agent
- 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.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 title claims abstract description 19
- 239000007921 spray Substances 0.000 title claims abstract description 19
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract 2
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 40
- 239000003595 mist Substances 0.000 claims description 51
- 238000001514 detection method Methods 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 6
- 229910021529 ammonia Inorganic materials 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
Images
Landscapes
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model relates to a double-fluid spray gun for SNCR (selective non-catalytic reduction) denitration reaction and belongs to the technical field of SNCR denitration. The double-fluid spray gun comprises a fog torch, an eddy current mixer, an outer pipe, an inner pipe and a jet device, wherein the fog torch is installed at the tail end of the outer pipe; a filter screen is installed at one end of the fog torch away from the outer pipe; the outer side of the inner pipe is sleeved with the outer pipe; the eddy current mixer is installed between the outer pipe and the inner pipe; and the jet device is installed at one end of the outer pipe away from the fog torch and is connected with a reducing agent. With the adoption of the double-fluid spray gun, the removal rate of NOx can be controlled above 60 percent, the emission concentration (6%O2, standard state and dry basis) is less than or equal to 100 mg/Nm<3>, and the ammonia escape rate is less than or equal to 10 ppm.
Description
Technical field
The utility model relates to a kind of two-fluid spray gun for SNCR denitration reaction, belongs to the out of stock technical field of SNCR.
Background technology
Current domestic coal-burning boiler SNCR denitration efficiency can only reach 50% left and right substantially, even the comprehensive denitration efficiency of this and environmental regulations more than 60% exists very large gap; Although SCR method denitration technology efficiency can reach more than 80%, cost of investment can significantly improve, and corresponding operating cost also can improve, and this is for the Thermal Power Enterprises of autonomous operation, and its burden is sizable; Meanwhile, Thermal Power Enterprises can not be enjoyed denitration operation electricity price, and the contradiction between the selection of denitration technology and investment operating cost is the problem that Thermal Power Enterprises faces.
How the SNCR that a kind of denitration efficiency is high and cost is low denitrification apparatus is provided, and the application's case proposes thus.
Utility model content
In order to overcome in prior art, the defect that SNCR denitration efficiency is low, the utility model provides the two-fluid spray gun for SNCR denitration reaction that a kind of cost is low, denitration efficiency is high.
For achieving the above object, the technical scheme that the utility model is taked is as follows:
For the two-fluid spray gun of SNCR denitration reaction, comprise mist torch, vortex mixer, outer tube, inner tube and jet flow device, mist torch is installed on outer tube end, in the one end away from outer tube, filter screen is installed, outer tube sleeve is loaded on inner tube outside, vortex mixer is installed between outer tube and inner tube, on outer tube, away from one end of mist torch, jet flow device is installed, and injector is connected with reducing agent.
Further, as preferably:
On described outer tube outer wall, be provided with positioner, the utility model be installed on the front wall or sidewall of burner hearth.
Described outer tube is provided with frequency conversion measuring pump near one end of mist torch, and frequency conversion measuring pump is positioned at cyclone mixer front, for detection of the concentration of NOx in flue, and then the conveying capacity of adjustment reducing agent.
Described outer tube is provided with Pressure gauge near one end of jet flow device.
Described mist torch is pyramidal structure, and it expands angle θ is 120-150 °, and the aperture of filter screen is 16-250 μ m, and the edge of aperture from center to both sides increases gradually, and therefrom mind-set edge increases 2 μ m every 1cm aperture.
In use procedure, outer tube and NH
3be connected, inner tube dress H
2o or water vapour, NH
3and H
2o or water vapour form reducing agent, the utility model two-fluid spray gun guarantees mixing of reducing agents and flue gas by following two aspects: the one, and mist torch shape is to design according to the flue feature of CFBB injection of reducing agent exit point, by the expansion angle of mist torch, guarantee that the reducing agent that mist torch ejects can cover whole flue; The 2nd, after atomization, reducing agent droplet fineness is distributed in jet characteristics and cigarette temperature characteristics matches, from 16 microns to 250 microns, droplet distributes by characteristic distribution curve, what near filter screen center, form is that mist drips, and form thick droplet near the position at edge, both sides, reducing agent enters after flue through mist torch, mist drips first evaporation, it carries reducing agent and mixes with flue gas in the filter screen immediate area from mist torch, thick droplet evaporation is slower, it carries reducing agent and is mixing with flue gas at a distance from mist torch, thereby has guaranteed being evenly distributed of the interior reducing agent of whole flue; Cyclone mixer is positioned at inner tube end, the NH that outer tube is carried
3the water vapour eddy current of carrying with inner tube rotates, to promote the mixture homogeneity of mist torch place reducing gases; Detect in real time the concentration of NOx in flue by frequency conversion measuring pump, and and then control the conveying capacity of mist torch place reducing agent (ammoniacal liquor), both energy-conservation, can continuously, accurately adjust again the quantity delivered of ammoniacal liquor, very durable, can effectively guarantee the emitted dose of reducing agent.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Number in the figure: 1. mist torch; 11. filter screens; 2. vortex mixer; 3. outer tube; 4. inner tube; 5. positioner; 6. frequency conversion measuring pump; 7. Pressure gauge; 8. injector.
The specific embodiment
The present embodiment, for the two-fluid spray gun of SNCR denitration reaction, in conjunction with Fig. 1, comprises mist torch 1, vortex mixer 2, outer tube 3, inner tube 4 and jet flow device 8, and mist torch 1 is installed on outer tube 3 ends, and mist torch 1 is provided with filter screen 11 on the one end away from outer tube 3; Outer tube 3 is set in the outside of inner tube 4, vortex mixer 2 is installed between outer tube 3 and inner tube 4, on outer tube 3, away from one end of mist torch 1, jet flow device 8 is installed, injector 8 is connected with reducing agent, one end place near jet flow device 8 on outer tube 3 is provided with Pressure gauge, for controlling the pressure of nitrogen in outer tube.Wherein, mist torch 1 is pyramidal structure, and it expands angle θ is 120 °, and the aperture of filter screen 11 is 16-200 μ m, and the edge of aperture from center to both sides increases gradually, and therefrom mind-set edge increases 2 μ m every 1cm aperture.
In use procedure, outer tube 3 and NH
3be connected, inner tube 4 fills H
2o or water vapour, NH
3and H
2o or water vapour form reducing agent, the utility model two-fluid spray gun guarantees mixing of reducing agents and flue gas by following two aspects: the one, and the shape of mist torch 1 is to design according to the flue feature of CFBB injection of reducing agent exit point, the setting of expansion angle θ by mist torch 1, guarantees that the reducing agent that mist torch 1 ejects can cover whole flue; The 2nd, after atomization, reducing agent droplet fineness is distributed in jet characteristics and cigarette temperature characteristics matches, from 16 microns to 250 microns, droplet distributes by characteristic distribution curve, what near filter screen 11 centers, form is that mist drips, and form thick droplet near the position at edge, both sides, reducing agent enters after flue through mist torch, mist drips first evaporation, it carries reducing agent and mixes with flue gas in filter screen 11 immediate area from mist torch 1, thick droplet evaporation is slower, it carries reducing agent and is mixing with flue gas at a distance from mist torch 1, thereby has guaranteed being evenly distributed of the interior reducing agent of whole flue; Cyclone mixer 2 between the outer tube 3 and inner tube 4 of inner tube 4 ends, the NH that outer tube 3 is carried
3the water vapour eddy current of carrying with inner tube 4 rotates, to promote the mixture homogeneity of mist torch 1 place's reducing gases.
Adopt the utility model two-fluid spray gun, the removal efficiency of NOx can be controlled in more than 60%, concentration of emission (6%O
2, mark state, butt) and≤100mg/Nm
3, the escaping of ammonia rate≤10ppm.
Embodiment 2
The present embodiment, for the two-fluid spray gun of SNCR denitration reaction, in conjunction with Fig. 1, comprises mist torch 1, vortex mixer 2, outer tube 3, inner tube 4 and jet flow device 8, and mist torch 1 is installed on outer tube 3 ends, and mist torch 1 is provided with filter screen 11 on the one end away from outer tube 3; Outer tube 3 is set in the outside of inner tube 4, vortex mixer 2 is installed between outer tube 3 and inner tube 4, on outer tube 3, away from one end of mist torch 1, jet flow device 8 is installed, injector 8 is connected with reducing agent, one end place near jet flow device 8 on outer tube 3 is provided with Pressure gauge, for controlling the pressure of nitrogen in outer tube; Outer tube 3 is provided with frequency conversion measuring pump 6 near one end of mist torch 1, and near one end of jet flow device 8, Pressure gauge 7 is installed at outer tube 3, and frequency conversion measuring pump 6 is positioned at cyclone mixer 2 fronts, for detection of the concentration of NOx in flue, and then the conveying capacity of adjustment reducing agent.Wherein, mist torch 1 is pyramidal structure, and it expands angle θ is 150 °, and the aperture of filter screen 11 is 20-250 μ m, and the edge of aperture from center to both sides increases gradually, and therefrom mind-set edge increases 2 μ m every 1cm aperture.
In use procedure, outer tube 3 and NH
3be connected, inner tube 4 fills H
2o or water vapour, NH
3and H
2o or water vapour form reducing agent, the utility model two-fluid spray gun guarantees mixing of reducing agents and flue gas by following two aspects: the one, and the shape of mist torch 1 is to design according to the flue feature of CFBB injection of reducing agent exit point, the setting of expansion angle θ by mist torch 1, guarantees that the reducing agent that mist torch 1 ejects can cover whole flue; The 2nd, after atomization, reducing agent droplet fineness is distributed in jet characteristics and cigarette temperature characteristics matches, from 16 microns to 250 microns, droplet distributes by characteristic distribution curve, what near filter screen 11 centers, form is that mist drips, and form thick droplet near the position at edge, both sides, reducing agent enters after flue through mist torch, mist drips first evaporation, it carries reducing agent and mixes with flue gas in filter screen 11 immediate area from mist torch 1, thick droplet evaporation is slower, it carries reducing agent and is mixing with flue gas at a distance from mist torch 1, thereby has guaranteed being evenly distributed of the interior reducing agent of whole flue; Cyclone mixer 2 between the outer tube 3 and inner tube 4 of inner tube 4 ends, the NH that outer tube 3 is carried
3the water vapour eddy current of carrying with inner tube 4 rotates, to promote the mixture homogeneity of mist torch 1 place's reducing gases; Detect in real time the concentration of NOx in flue by frequency conversion measuring pump, and and then control the conveying capacity of mist torch place reducing agent (ammoniacal liquor), both energy-conservation, can continuously, accurately adjust again the quantity delivered of ammoniacal liquor, very durable, can effectively guarantee the emitted dose of reducing agent.
Embodiment 3
The present embodiment is identical with setting and the operation principle of embodiment 2, difference is: on outer tube 3, be set with positioner 5, the utility model is installed on the front wall or sidewall of burner hearth, can obtain the longer reducing agent time of staying and good mixed effect, be combined with frequency conversion flow pump, control the escapement ratio of ammonia.
Claims (5)
1. for the two-fluid spray gun of SNCR denitration reaction, it is characterized in that: comprise mist torch, vortex mixer, outer tube, inner tube and jet flow device, mist torch is installed on outer tube end, in the one end away from outer tube, filter screen is installed, outer tube sleeve is loaded on inner tube outside, vortex mixer is installed between outer tube and inner tube, on outer tube, away from one end of mist torch, jet flow device is installed, and injector is connected with reducing agent.
2. the two-fluid spray gun for SNCR denitration reaction as claimed in claim 1, it is characterized in that: described outer tube is provided with frequency conversion measuring pump near one end of mist torch, frequency conversion measuring pump is positioned at cyclone mixer front, for detection of the concentration of NOx in flue, and then the conveying capacity of adjustment reducing agent.
3. the two-fluid spray gun for SNCR denitration reaction as claimed in claim 1, is characterized in that: described outer tube is provided with Pressure gauge near one end of jet flow device.
4. the two-fluid spray gun for SNCR denitration reaction as claimed in claim 1, is characterized in that: on described outer tube outer wall, be provided with positioner.
5. the two-fluid spray gun for SNCR denitration reaction as described in claim 1-4 any one, it is characterized in that: described mist torch is pyramidal structure, it expands angle θ is 120-150 °, the aperture of filter screen is 16-250 μ m, the edge of aperture from center to both sides increases gradually, and therefrom mind-set edge increases 2 μ m every 1cm aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320866130.4U CN203678564U (en) | 2013-12-26 | 2013-12-26 | Double-fluid spray gun for SNCR (selective non-catalytic reduction) denitration reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320866130.4U CN203678564U (en) | 2013-12-26 | 2013-12-26 | Double-fluid spray gun for SNCR (selective non-catalytic reduction) denitration reaction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203678564U true CN203678564U (en) | 2014-07-02 |
Family
ID=51000526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320866130.4U Expired - Fee Related CN203678564U (en) | 2013-12-26 | 2013-12-26 | Double-fluid spray gun for SNCR (selective non-catalytic reduction) denitration reaction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203678564U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110268948A (en) * | 2019-06-19 | 2019-09-24 | 浙江师范大学 | A kind of piezoelectricity micro-spray device and the seedling culture device using the device |
-
2013
- 2013-12-26 CN CN201320866130.4U patent/CN203678564U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110268948A (en) * | 2019-06-19 | 2019-09-24 | 浙江师范大学 | A kind of piezoelectricity micro-spray device and the seedling culture device using the device |
| CN110268948B (en) * | 2019-06-19 | 2023-11-10 | 浙江师范大学 | Piezoelectric micro-spraying device and seedling culture equipment using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102179171B (en) | Multi-stage themolysis coupled denitration method using front flow field uniformizing device and device thereof | |
| CN105233656A (en) | Process used for removing sulfur trioxide in flue gas of coal-fired power plant | |
| CN103463977A (en) | SCR (Selective Catalytic Reduction) denitration device for directly spraying ammonium hydroxide | |
| US9664383B2 (en) | Denitrification apparatus | |
| CN205109379U (en) | Sulfur trioxide's desorption system in coal fired power plant flue gas | |
| CN203678250U (en) | Selective non-catalytic reduction (SNCR) denitration reactor provided with double-fluid spray gun | |
| CN203678564U (en) | Double-fluid spray gun for SNCR (selective non-catalytic reduction) denitration reaction | |
| CN204933244U (en) | NOx removal device in coal-burning power plant's coal-powder boiler flue gas | |
| CN109603542A (en) | Special spray gun for liquid phase catalyst | |
| CN106310933A (en) | Flue gas denitration system for coal water slurry boiler and method for denitrating flue gas | |
| CN103170231A (en) | Spray gun specially for selective non-catalytic reduction (SNCR) denitration process | |
| CN210425048U (en) | Concentrated solution furnace-entering back-spraying system capable of reducing concentration of nitrogen oxides in furnace | |
| CN209393025U (en) | A kind of SCR boiler flue gas denitration system | |
| CN213492988U (en) | Ammonia water vaporization ammonia preparation device | |
| CN207680333U (en) | Urea direct-injection SNCR+SCR flue gas denitrification systems | |
| CN202962241U (en) | Device for synergistically removing flue gas mercury | |
| CN206526671U (en) | A kind of SNCR denitration equipment of adjustable Burners Positions | |
| CN204973512U (en) | Improved generation SNCR+ ozone flue gas denitration device | |
| CN205627607U (en) | Modified SNCR denitrification facility of medium temperature high efficiency of gratefiring boiler | |
| CN204042872U (en) | Low nitrogen burning and SNCR denitration device | |
| CN209646243U (en) | A kind of liquid-phase catalyst spray gun special | |
| CN204448352U (en) | A kind of denitration spray gun | |
| CN203842493U (en) | Spray gun with temperature probe | |
| CN203329613U (en) | Novel denitration device for power plant | |
| CN202860391U (en) | Non-selective catalytic reduction denitration device used for cement kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 |