CN202199251U - Nitrogen-reducing denitration atomizing spray gun for explosion-proof pipe - Google Patents
Nitrogen-reducing denitration atomizing spray gun for explosion-proof pipe Download PDFInfo
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- CN202199251U CN202199251U CN2011203290417U CN201120329041U CN202199251U CN 202199251 U CN202199251 U CN 202199251U CN 2011203290417 U CN2011203290417 U CN 2011203290417U CN 201120329041 U CN201120329041 U CN 201120329041U CN 202199251 U CN202199251 U CN 202199251U
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Abstract
The utility model discloses a nitrogen-reducing denitration atomizing spray gun for an explosion-proof pipe, which comprises a spray gun body. A pneumatic interlocking device is arranged inside the spray gun body and comprises a spray gun cover and pressure regulating cap, a cylinder, a gas-liquid partition plate and limiter, a spring, a first piston and sealing sleeve, a piston connecting rod, a switch stopper, a spray pipe and valve sleeve and a second piston and sealing sleeve, the spray gun cover and pressure regulating cap is connected with the cylinder in a threaded manner, the gas-liquid partition plate and limiter is connected with the cylinder in a threaded manner and mounted between the cylinder and the spray gun body by means of threaded connection between the cylinder and the spray gun body, one end of the spring is clamped in a fixing groove of the gas-liquid partition plate and limiter, the other end of the spring is abutted to the gas-liquid partition plate and limiter, the first piston and sealing sleeve, the second piston and sealing sleeve and the piston connecting rod are connected through connecting screws, the piston connecting rod is connected with the switch stopper through a hook, the switch stopper is directly inserted into the spray pipe and valve sleeve, a gas inlet is communicated with the gas-liquid partition plate and limiter, and a water inlet is communicated with the spray pipe and valve sleeve. When gas pressure is lower than 0.2MPa, the spray gun automatically stops spraying reducing agents, an SNCR (selective non-catalytic reduction) denitration system is prevented from running to cause the possibility of pipe penetration and explosion of boiler water-cooled wall, and the safety performance of the whole equipment is improved.
Description
Technical field
The utility model relates to flue gas and falls nitrogen denitration field, and nitrogen denitration atomizing lance falls in especially a kind of explosion stack.
Background technology
Nitrogen oxide (NOx) is one of coal-burning power plant's major pollutants discharged, also is a kind of pollutant that receives very big concern in the most in recent years.Domestic 65% NOx is coal-fired the generation at present, and China is maximum coal production state and country of consumption.According to scholarly forecast, if do not adopt an effective measure, along with the development of coal-fired industry, in following 5-10, the NOx discharge capacity possibly surpass SO
2And become first sour gas pollutant
[1]Therefore, carrying out coal-burning boiler, to fall the nitrogen denitration be an extremely urgent job.
At present, denitration of boiler smoke engineering major technique has both at home and abroad: selective catalytic reduction (SCR), SNCR method (SNCR), low nitrogen burning method (LNC).In various NOx removing process, the SNCR denitrating technique has that cost is low, floor space is little, the simple advantage of facility, especially is fit to the transformation of old power plant.
In the SNCR system, spray gun is a key equipment of realizing the denitration target.General using compressed air is atomized into fine mist with denitrification reducing agent in spray gun, and spray into that burner hearth mixes with flue gas, pyrolysis, reaction, and reach the denitration purpose.The compressed air of entering spray gun, the normal pressure of reducing agent are respectively 0.35-0.45Mpa, 0.30-0.35Mpa.When reducing agent is carried normal and compressed air delivery when breaking down; Very big to the denitrating system influence on system operation: (1) compressed air delivery pressure is during less than 0.2Mpa; The atomizing effect of reducing agent relatively poor (the atomizing particle particle diameter is big, jet length long); Make the part drop inject directly to the water screen tube surface, and then make the water screen tube poling that is corroded, even directly because of the water-cooling wall surface temperature booster that plunges; When (2) non-compressed air was carried, reducing agent sprayed into burner hearth (jet length is about 15m) and direct directive opposite water-cooling wall with the form of water column, and the water screen tube surface temperature is sharply reduced and booster.
Water-cooling wall poling, booster normally move the bigger influence of existence to boiler: 1. boiler must be promptly out of service, to avoid the generation of major accident; 2. boiler belong to special equipment safeguard strongly professional, difficulty is big, expense is high; 3. restart boiler and need consume a large amount of diesel oil; 4. furnace shutdown period reduces delivery/quantity of steam, influences factory's ordinary production.
The utility model content
The purpose of the utility model is the reason to denitrating system operation causing boiler water wall poling, booster; Suitable transformation is carried out in design, installation, operation control to the atomizing lance of denitrating system, to reduce or to avoid the operation of SNCR (SNCR) denitrating system to cause the possibility of boiler water wall poling, booster.
For realizing above purpose; Technical scheme below the utility model has been taked: nitrogen denitration atomizing lance falls in a kind of explosion stack; Comprise spraygun body; Be provided with the pneumatic interlocking device in said spraygun body inside, said pneumatic interlocking device comprises that spray gun lid and pressure regulates cap, cylinder, gas-liquid dividing plate and spacing, spring, first piston and Seal Kit, piston rod, cock plug, playpipe and valve external member, second piston and Seal Kit; Said spray gun lid and pressure are regulated between cap and the cylinder through being threaded; Between said gas-liquid dividing plate and spacing and the cylinder through being threaded; Gas-liquid dividing plate and spacingly be assembled in its position through being threaded between cylinder and spraygun body; Spring one end is stuck in gas-liquid dividing plate and spacing holddown groove, and the other end withstand on the gas-liquid dividing plate and spacing on, connect through being connected screw between said first piston and Seal Kit, second piston and Seal Kit and the piston rod; Through colluding buckle, cock plug directly is inserted in playpipe and the valve external member between piston rod and the cock plug; Air inlet and gas-liquid dividing plate and spacing communicating, water inlet communicates with playpipe and valve external member.
The operation principle of the utility model is: the normal operating air pressure of equipment when operating air pressure is lower than 0.2Mpa, just is regarded as the dangerous work state at 0.3～0.5Mpa.This equipment drives the piston motion through the difference of atmospheric pressure and spring force, thereby liquid is carried out switching manipulation.When air pressure was lower than 0.2Mpa, spring promoted piston, and piston drives piston rod and cock plug, thus the closing liquid outlet; When air pressure during at 0.3～0.5Mpa, gas pressure promotes piston, and piston drives piston rod and cock plug, thereby opens liquid outlet.
The utility model compared with prior art has following advantage: when the little 0.2Mpa of air pressure, spray gun cuts out reducing agent spraying automatically; Avoid SNCR (SNCR) denitrating system to move the possibility that causes boiler water wall poling, booster, improved the security performance of entire equipment.
Description of drawings
Fig. 1 falls nitrogen denitration atomizing lance structure cutaway view for the utility model explosion stack;
Description of reference numerals: 1-spray gun lid and pressure are regulated cap, 2-cylinder, 3-gas-liquid dividing plate and spacing, 4-spring; 5-connects screw, 6-first piston and Seal Kit, 7-piston rod; The 8-cock plug, 9-playpipe and valve external member, 10-second piston and Seal Kit; The 11-spraygun body, 12-air inlet, 13-water inlet.
The specific embodiment
Explain further details below in conjunction with accompanying drawing and the specific embodiment content to the utility model.
Embodiment:
See also shown in Figure 1; Nitrogen denitration atomizing lance falls in a kind of explosion stack; Comprise spraygun body 11; Be provided with the pneumatic interlocking device in spraygun body 11 inside, the pneumatic interlocking device comprises that spray gun lid and pressure regulates cap 1, cylinder 2, gas-liquid dividing plate and spacing 3, spring 4, first piston and Seal Kit 6, piston rod 7, cock plug 8, playpipe and valve external member 9, second piston and Seal Kit 10; Spray gun lid and pressure are regulated between cap 1 and the cylinder 2 through being threaded; The gas-liquid dividing plate and spacing 3 and cylinder 2 between through being threaded; Gas-liquid dividing plate and spacing 3 is assembled in its position through being threaded of 11 of cylinder 2 and spraygun body; Spring 4 one ends are stuck in the holddown groove of gas-liquid dividing plate and spacing 3, and the other end withstands on gas-liquid dividing plate and spacing 3, connect through being connected screw 5 between first piston and Seal Kit 6, second piston and Seal Kit 10 and the piston rod 7; Through colluding buckle, cock plug 8 directly is inserted in playpipe and the valve external member 9 between piston rod 7 and the cock plug 8; Air inlet 12 communicates with gas-liquid dividing plate and spacing 3, and water inlet 13 communicates with playpipe and valve external member 9.
Above-listed detailed description is to the specifying of the utility model possible embodiments, and this embodiment is not the claim in order to restriction the utility model, does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the claim of this case.
Claims (1)
1. nitrogen denitration atomizing lance falls in explosion stack; Comprise spraygun body (11); It is characterized in that: be provided with the pneumatic interlocking device in said spraygun body (11) inside, said pneumatic interlocking device comprises spray gun lid and pressure adjusting cap (1), cylinder (2), gas-liquid dividing plate and spacing (3), spring (4), first piston and Seal Kit (6), piston rod (7), cock plug (8), playpipe and valve external member (9), second piston and Seal Kit (10); Said spray gun lid and pressure are regulated between cap (1) and the cylinder (2) through being threaded; Between said gas-liquid dividing plate and spacing (3) and the cylinder (2) through being threaded; Gas-liquid dividing plate and spacing (3) are assembled in its position through being threaded between cylinder (2) and spraygun body (11); Spring (4) one ends are stuck in the holddown groove of gas-liquid dividing plate and spacing (3); And the other end withstands on gas-liquid dividing plate and spacing (3); Connect through being connected screw (5) between said first piston and Seal Kit (6), second piston and Seal Kit (10) and the piston rod (7), through colluding buckle, cock plug (8) directly is inserted in playpipe and the valve external member (9) between piston rod (7) and the cock plug (8); Air inlet (12) communicates with gas-liquid dividing plate and spacing (3), and water inlet (13) communicates with playpipe and valve external member (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203290417U CN202199251U (en) | 2011-09-02 | 2011-09-02 | Nitrogen-reducing denitration atomizing spray gun for explosion-proof pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203290417U CN202199251U (en) | 2011-09-02 | 2011-09-02 | Nitrogen-reducing denitration atomizing spray gun for explosion-proof pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202199251U true CN202199251U (en) | 2012-04-25 |
Family
ID=45963389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203290417U Expired - Lifetime CN202199251U (en) | 2011-09-02 | 2011-09-02 | Nitrogen-reducing denitration atomizing spray gun for explosion-proof pipe |
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| Country | Link |
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| CN (1) | CN202199251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990367A (en) * | 2014-05-23 | 2014-08-20 | 浙江莱梦德电力设备有限公司 | Improved-type desulfurization and denitrification spray gun |
-
2011
- 2011-09-02 CN CN2011203290417U patent/CN202199251U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990367A (en) * | 2014-05-23 | 2014-08-20 | 浙江莱梦德电力设备有限公司 | Improved-type desulfurization and denitrification spray gun |
| CN103990367B (en) * | 2014-05-23 | 2016-02-03 | 姜建勇 | The spray gun of modified desulphurization denitration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120425 |