CN203990293U - A kind of low thermal stress Denitration in Boiler spray gun - Google Patents
A kind of low thermal stress Denitration in Boiler spray gun Download PDFInfo
- Publication number
- CN203990293U CN203990293U CN201420254699.XU CN201420254699U CN203990293U CN 203990293 U CN203990293 U CN 203990293U CN 201420254699 U CN201420254699 U CN 201420254699U CN 203990293 U CN203990293 U CN 203990293U
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- China
- Prior art keywords
- denitration
- spray gun
- playpipe
- sleeve pipe
- reducing agent
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Abstract
The utility model discloses a kind of low thermal stress Denitration in Boiler spray gun, by evaporation sleeve pipe, playpipe, conical nozzle, fan nozzle, pipe clamp and mounting flange etc., formed.First baffling vaporization in evaporation sleeve pipe of reducing agent, is ejected into denitration reducing zone by the fan-shaped Suo mouth of playpipe both sides conical nozzle and end again after vaporization and carries out denitration reaction.Described spray gun adopts reducing agent baffling vaporization in evaporation sleeve pipe, and heat exchange efficiency is high, and thermal deformation is little; Reducing agent directly sprays after evaporation in evaporation sleeve pipe, and reducing agent sprays evenly, denitration effect is good.The utility model spray gun adopts in furnace wall plug-in type and installs, and by flange, connects, and I&M is convenient.It is simple in structure, and thermal deformation is little, and long service life is applied widely, is easy to promotion and implementation, has good economic benefit.
Description
Technical field:
The utility model relates to a kind of low thermal stress Denitration in Boiler spray gun, is mainly used in take in SNCR denitrating system that ammoniacal liquor or urea liquid are reducing agent.
Background technology:
Enforcement along with national standard < < fossil-fuel power plant atmospheric pollutant emission standard > > (GB13223-2011), NOx concentration in most of built and newly-built coal-fired electric generation furnace discharge flue gas all cannot meet the requirement of new standard, must select suitable equipment for denitrifying flue gas to carry out denitration processing.SNCR denitrating technique has denitration efficiency medium (30%～70%), without catalyst, the feature such as operating cost is lower, the construction period is shorter, be especially applicable to the transformation of medium small boiler, be subject to the favor in market.In SNCR denitrating system, reducing agent spray gun is that system is most crucial, one of the parts of most critical, and its installation site, jeting effect are directly connected to the efficiency of system denitration and the size of amount of ammonia slip.SNCR denitration is a kind of denitration mode of non-catalytic reduction, and its reaction temperature window is very narrow, in order to find suitable conversion zone, sometimes needs spray gun to extend into burner hearth internal spray.In use, the impact of the extraneous factors such as spray gun is subject to that inner flue gas of the stove flows, high temperature (800～1100 ℃) and dust stratification, spray gun thermal stress distribution is uneven, cause spray gun flexural deformation after using one section, had a strong impact on the service life of spray gun, thereby spray gun is safeguarded, change frequently, restricted the further performance of denitration production efficiency.
Utility model content:
Technical problem to be solved in the utility model is: overcome that existing spray gun thermal stress distribution is uneven, unreasonable structure and the deficiency such as yielding, provide a kind of reasonable in design, thermal deformation is little, easy for installation, denitration efficiency is high, the escaping of ammonia rate is low and manufacture simple boiler denitration spray gun.
The technical solution of the utility model is: a kind of low thermal stress Denitration in Boiler spray gun forms by evaporating sleeve pipe, playpipe, conical nozzle, fan nozzle, pipe clamp and mounting flange etc.Denitrification reducing agent enters spray gun evaporation sleeve pipe by described spray gun reducing agent entrance, reducing agent baffling and inner flue gas of the stove in sleeve pipe carry out heat exchange vaporization, after reducing agent vaporization, enter playpipe, then the fan nozzle by playpipe both sides conical nozzle and end is ejected into denitration reduced zone and carries out denitration reaction.
Lance ejection pipe is arranged on evaporation sleeve pipe top, and playpipe can be made into one-sided or bilateral, and playpipe adopts two pipe clamps in left and right to fix with evaporation sleeve pipe.Can be in both sides according to the needs of installation site or one-sided installation conical nozzle in playpipe end and playpipe both sides, or directly open bellmouth injection reduction agent steam.When denitrating system stops, can be blown into compressed air, cooling spray gun to evaporation sleeve pipe and playpipe.When denitrating system used time not for a long time, can open flange, from burner hearth, extract out.
The beneficial effects of the utility model are:
1. the utility model has carried out innovative design to denitration spray gun, change tradition and utilize the method for compressed air atomized liquid reducing agent, but an evaporation sleeve pipe is set before lance ejection, liquid reducing agent heat absorption in evaporation sleeve pipe becomes steam, and in playpipe, directly the form with steam is ejected in boiler.Reducing agent ejects with vapor form, has simplified the structure of lance ejection system, has saved atomization compressed air, and the oxygen concentration of reducing zone is reduced, and is beneficial to the reduction reaction of NOx.
2. the utility model evaporation sleeve pipe is arranged in downside, and playpipe is arranged in upside; Evaporation sleeve pipe can be avoided pipe temperature skewness, thereby reduces the generation of thermal deformation.Evaporation sleeve pipe and playpipe adopt two pipe clamps in left and right to fix, and can allow spray gun linear extendible, can avoid evaporating sleeve pipe and the different distortion that cause of the linear stroke of playpipe simultaneously.In addition, pipe clamp can about beam evaporation sleeve pipe and the distortion of playpipe vertical direction.Pipe clamp can adopt welding or bolt to connect.
3. the utility model playpipe end adopts fan nozzle, and nozzle equivalent diameter is larger, and nozzle ejection face level is installed, and is responsible for larger response area before spray gun; Jet pipe side horizontal direction is offered row's bellmouth, is responsible for conversion zone between two spray guns.
4. the utility model spray gun adopts flange to be connected with boiler, and fan nozzle adopts screw thread to be connected with spray gun, conveniently connects and changes.It is easily manufactured, and cost is lower, applied widely, is easy to promotion and implementation, has good economic benefit.
Accompanying drawing explanation:
Fig. 1 is the structural representation of low thermal stress Denitration in Boiler spray gun, and Fig. 2 and Fig. 3 are respectively the profiles in 1-1 cross section and 2-2 cross section in Fig. 1.
Fig. 4 is that low thermal stress Denitration in Boiler spray gun is at boiler SNCR denitration application schematic diagram.
In Fig. 1, Fig. 2 and Fig. 3,1-fan nozzle, 2-conical nozzle, 3-pipe clamp, 4-playpipe, 5-evaporates sleeve pipe, 6-mounting flange, 7-compressed air inlet, 8-reducing agent entrance.
In Fig. 4,1-boiler furnace, 2-vapor heat exchanger, 3-low thermal stress Denitration in Boiler spray gun.
the specific embodiment:
Embodiment: Fig. 4 is boiler SNCR denitrating system, low thermal stress Denitration in Boiler spray gun described in the utility model (3) adopts stainless steel 310S to make, be arranged on the sidewall of boiler furnace, left and right two, in the face of dress, is specifically installed length and the quantity of spray gun and is determined according to the size of boiler.
Operation principle:
1.5%～10% ammoniacal liquor is sent in spray gun by spray gun reducing agent entrance, and ammoniacal liquor is vaporized in evaporation sleeve pipe infolding flows through journey, and ammoniacal liquor vaporization, specific volume increase.
2. ammonia vapor enters in playpipe, and temperature continues to raise, and specific volume continues to increase, and the ammonia vapor of HTHP sprays by the conical nozzle of playpipe side and the fan nozzle of end.
3., if emission of NOx of boiler is larger, when required reducing agent is larger, evaporation sleeve pipe is vaporized when incomplete, can pass into compressed air at playpipe entrance, strengthens vaporization.
4. by changing the rotating speed of measuring pump, be the emitted dose of adjustable ammonia spirit, change the amount that compressed-air actuated control valve can change atomizing air, meet the variation of boiler load.
Low thermal stress Denitration in Boiler spray gun of the present utility model is the core component of SNCR denitrating system, by utilization of the present utility model, makes denitration spray gun when meeting denitration efficiency and the escaping of ammonia rate, increases the service life, and saves operating cost.
The above, be only preferred embodiment of the present utility model, not the utility model done to any pro forma restriction, and any simple modification that every foundation technical spirit of the present utility model is done, all still belongs in the scope of technical solutions of the utility model.
Claims (5)
1. a low thermal stress Denitration in Boiler spray gun, contain evaporation sleeve pipe (5), playpipe (4), conical nozzle (2), fan nozzle (1), pipe clamp (3) and mounting flange (6), it is characterized in that: denitrification reducing agent enters spray gun evaporation sleeve pipe (5) by described spray gun reducing agent entrance (8), reducing agent baffling and inner flue gas of the stove in evaporation sleeve pipe carry out heat exchange vaporization, after reducing agent vaporization, enter playpipe (4), then the fan nozzle (1) by playpipe (4) both sides conical nozzles (2) and end is ejected into denitration reduced zone and carries out denitration reaction.
2. low thermal stress Denitration in Boiler spray gun according to claim 1, is characterized in that: described evaporation sleeve pipe (5) can be that two tubes or three pipes socket-connect, and forms countercurrent flow; Described playpipe can be one-sided or bilateral is arranged.
3. low thermal stress Denitration in Boiler spray gun according to claim 1, it is characterized in that: a fan nozzle (1) is installed in described playpipe (3) end, fan nozzle (1) inner flow passage end is conical, and outside opens one by runner central cross V-shaped groove.
4. low thermal stress Denitration in Boiler spray gun according to claim 1, is characterized in that: described playpipe (3) can be in both sides according to the needs of installation site or one-sided installation conical nozzle (2), or open bellmouth.
5. low thermal stress Denitration in Boiler spray gun according to claim 1, is characterized in that: left and right two pipe clamps (3) are installed between evaporation sleeve pipe (5), playpipe (4), utilize evaporation sleeve pipe (5) to support playpipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420254699.XU CN203990293U (en) | 2014-05-19 | 2014-05-19 | A kind of low thermal stress Denitration in Boiler spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420254699.XU CN203990293U (en) | 2014-05-19 | 2014-05-19 | A kind of low thermal stress Denitration in Boiler spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203990293U true CN203990293U (en) | 2014-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420254699.XU Expired - Fee Related CN203990293U (en) | 2014-05-19 | 2014-05-19 | A kind of low thermal stress Denitration in Boiler spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203990293U (en) |
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2014
- 2014-05-19 CN CN201420254699.XU patent/CN203990293U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151202 Address after: 450000 Henan city of Zhengzhou province Zheng open road and road intersection of North West 2 kilometers Yanming Patentee after: Zhengzhou Electric Power College Address before: 450004 Henan province Zheng Dong New District of Zhengzhou City Yanming road Zhengzhou Electric Power College Patentee before: Chen Jiangtao |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |