CN207169399U - SNCR boiler flue gas denitration system - Google Patents
SNCR boiler flue gas denitration system Download PDFInfo
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- CN207169399U CN207169399U CN201720987568.6U CN201720987568U CN207169399U CN 207169399 U CN207169399 U CN 207169399U CN 201720987568 U CN201720987568 U CN 201720987568U CN 207169399 U CN207169399 U CN 207169399U
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Abstract
A kind of SNCR boiler flue gas denitration system, including boiler, compressed air system, urea liquid feed system and denitration spray gun, the compressed air provided by compressed air system and the urea liquid provided by urea liquid feed system are connected to denitration spray gun by pipeline, and the multiple denitration spray guns being assemblied on boiler diaphragm type wall are ejected into burner hearth high-temperature region after compressed air and urea liquid are sufficiently mixed into atomization.This SNCR boiler flue gas denitration system is simple in construction, cost-effective, stable and reliable operation, and denitration of boiler smoke effect is good, disclosure satisfy that the denitration of boiler smoke needs of high standard.New denitration spray gun is used simultaneously, and not only the atomizing effect of urea liquid is good, and injection coverage is big, and the anterior diameter dimension of spray gun is small, is easily installed in the membrane wall pipe position of boiler, especially suitable for the use on the boiler run.
Description
Technical field
It the utility model is related to denitration of boiler smoke equipment, and in particular to a kind of SNCR boiler smoke qi exhaustion
Nitre system.
Background technology
With the reinforcement of national environmental protection policy, the NOx emission index of boiler is also increasingly strict.To reduce nitrogen oxides
Discharge capacity to boiler, it is necessary to carry out denitration transformation.SNCR (SNCR) is the cigarette for not needing catalyst action
Gas denitration technology, the region generation for spraying reductant into the specified temp point (being usually 800-1100 DEG C) of boiler are spontaneous
Reaction, N is reduced to by NOx2.Compared to SCR（ SCR ）System, SNCR have
The features such as equipment is simple, initial outlay is few, operation and maintenance cost is low, but it is the need for good mixing and reaction compartment, time
Condition.Existing SNCR boiler flue gas denitration system, because reducing agent sprays into the covering model of boiler high temperature area
Enclose and uniformity is short of, the atomizing effect of particularly reducing agent injection is poor, and denitration effect is undesirable.Simultaneously because by denitration spray gun
Structure limits, and the diameter dimension of particularly denitration spray gun is relatively large, it is difficult to installed in the membrane wall pipe position of boiler, also influences
Its use on the boiler run.
The content of the invention
The purpose of this utility model is in view of the above-mentioned problems, providing a kind of SNCR denitration of boiler smoke
System, the system architecture is simple, cost-effective, stable and reliable operation, and denitration of boiler smoke effect is good, disclosure satisfy that high standard
Denitration of boiler smoke needs.New denitration spray gun is used simultaneously, and not only the atomizing effect of reducing agent is good, sprays coverage
Greatly, and spray gun anterior diameter dimension it is small, be easily installed in the membrane wall pipe position of boiler, especially suitable for running
Use on boiler.
Realizing the technical scheme of above-mentioned purpose is：A kind of SNCR boiler flue gas denitration system, including pot
Stove, compressed air system, urea liquid feed system and denitration spray gun, by the compressed air of compressed air system offer and by urinating
The urea liquid that plain solution feeding system provides is connected to denitration spray gun by pipeline, is assemblied in multiple de- on boiler diaphragm type wall
Nitre spray gun is ejected into after compressed air is mixed with urea liquid in burner hearth high-temperature region；Described denitration spray gun has coaxial traditional thread binding
Overcoat, inner tube and the mozzle being placed between overcoat and inner tube matched somebody with somebody, the front end connection nozzle of the overcoat, before said inner tube
End connection nozzle core, the face of cylinder that the nozzle core and the nozzle coordinate are provided with spiral shape guiding gutter, after the overcoat
End is connected with the rear end of said inner tube, and the rear end of the mozzle is connected to the rear portion of the overcoat, and the rear portion of the overcoat is set
There are inner tube air-path interface, overcoat air-path interface and urea liquid interface.
Above-mentioned SNCR boiler flue gas denitration system, described urea liquid feed system include urea
Dissolving tank and urea liquid storage tank, the urea dissolving tank and urea liquid storage tank assemble agitator, the urea dissolving respectively
Groove is connected with urea liquid storage tank by assembling the pipeline of urea delivery pump, described urea dissolving tank assembling conveying worm
And running water pipe, the charging aperture of the conveying worm are connected with the discharging opening of urea granules supply warehouse, described urea is molten
Liquid storage tank is provided with the urea liquid transfer pipeline of assembling urea liquid jet pump.
Above-mentioned SNCR boiler flue gas denitration system, described urea dissolving tank and urea liquid storage tank
Spiral shape hot-water line is inside respectively equipped with, described spiral shape hot-water line connects boiler by assembling the circulation line of hot water circulating pump
Boiler.
This SNCR boiler flue gas denitration system is simple in construction, and construction costs, energy consumption and operating cost are low,
Stable and reliable operation, denitration of boiler smoke effect is good, disclosure satisfy that the denitration of boiler smoke needs of high standard.
This SNCR boiler flue gas denitration system uses new denitration spray gun, the urea as reducing agent
Solution is entered in overcoat by urea liquid interface, and compressed air enters mozzle by overcoat air-path interface all the way, and by mozzle
Front end outflow is sufficiently mixed atomization with urea liquid in spray gun overcoat first, and its mixed aerosol air-flow passes through spiral shape guiding gutter
Nozzle inner chamber front portion is rotated at a high speed, and another way compressed air is entered inner tube and moved ahead by inner tube air-path interface enters nozzle
Core, it is anterior with rotating into spray at a high speed by spiral shape guiding gutter that nozzle inner chamber is then entered at a high speed by the spray orifice of nozzle core front end
The anterior atomization urea liquid in nozzle inner chamber carries out mixed aerosol again, is finally sprayed at a high speed by the spray orifice of nozzle front end, it is urinated
The atomizing effect of plain solution is good, and injection coverage is big.This denitration spray gun front portion diameter dimension can be accomplished below φ 17mm simultaneously,
It is easily installed in the membrane wall pipe position of boiler, especially suitable for the use on the boiler run.
The urea liquid feed system of this SNCR boiler flue gas denitration system is simple in construction, floor space
It is small, control easy to operation.
This SNCR boiler flue gas denitration system is heated using boiler hot-water for urea liquid, and it heats system
System is simple, takes heat convenient, can improve denitration of boiler smoke clean-up effect.
Brief description of the drawings
Fig. 1 is this SNCR boiler flue gas denitration system schematic diagram.
Fig. 2 is the denitration spray gun structural representation of this SNCR boiler flue gas denitration system.
Fig. 3 is the urea liquid feed system schematic diagram of this SNCR boiler flue gas denitration system.
In figure：1st, boiler；2nd, compressed air system；3rd, urea liquid feed system；4th, denitration spray gun；5th, overcoat；6th, it is interior
Pipe；7th, mozzle；8th, nozzle；9th, nozzle core；10th, guiding gutter；11st, inner tube air-path interface；12nd, overcoat air-path interface；13rd, urea
Solution interface；14th, urea dissolving tank；15th, urea liquid storage tank；16th, agitator；17th, urea delivery pump；18th, conveying worm；
19th, running water pipe；20th, urea granules supply warehouse；21st, urea liquid jet pump；22nd, spiral shape hot-water line；23rd, hot water circuit
Pump；24th, boiler hot water tank.
Embodiment
The utility model is described in further detail in conjunction with the accompanying drawings and embodiments.
Such as Fig. 1, this SNCR boiler flue gas denitration system includes boiler 1, compressed air system 2, urea
Solution feeding system 3 and denitration spray gun 4, boiler 1 can be chain-grate boilers, and compressed air system 2 is mainly by air screw pressure
Contracting machine, air accumulator, filter and air duct composition.The compressed air that is there is provided by compressed air system 2 and supplied by urea liquid
The urea liquid provided to system 3 is connected to denitration spray gun 4 by pipeline, the multiple denitrations spray being assemblied on the membrane wall of boiler 1
Rifle 4 is ejected into after compressed air is mixed with urea liquid in burner hearth high-temperature region.
Such as Fig. 2, described denitration spray gun 4 there is the overcoat 5 of coaxial line assembling, inner tube 6 and be placed in overcoat 5 and inner tube 6 it
Between mozzle 7, the front end connection nozzle 8 of the overcoat 5, the nozzle 8 has the inner chamber combined with circular conical surface of the face of cylinder, its circle
Conical surface inner chamber front end sets circular nozzle spray orifice.The front end connection nozzle core 9 of said inner tube 6, the nozzle core 9 has and nozzle
The face of cylinder section and circular conical surface section that 8 inner chambers coordinate, its nozzle core 9 on the face of cylinder of the cooperation of nozzle 8 with being evenly distributed with a plurality of spiral shell
Shape guiding gutter 10 is revolved, the spiral shape guiding gutter 10 is suitably arranged to arc section groove, and the front end of nozzle core 9 sets circular spray
Nozzle core spray orifice, the nozzle core spray orifice and described nozzle spray orifice coaxial line.The rear end of the overcoat 5 and the rear end of said inner tube 6
It is connected by screw thread, the rear end of the mozzle 7 is connected at the rear portion of the overcoat 5 by screw thread.The overcoat 5
Rear portion be provided with inner tube air-path interface 11, overcoat air-path interface 12 and urea liquid interface 13, such as Fig. 2 embodiments, inner tube gas circuit
Interface 11, overcoat air-path interface 12 and urea liquid interface 13 are arranged to be threadedly coupled interface, inner tube air-path interface 11 and inner tube
Coaxial line connects, and urea liquid interface 13 and overcoat air-path interface 12 are respectively positioned at mozzle 7 and the screw thread mating connection point of overcoat 5
Front and rear sides.
As Fig. 3, the urea liquid feed system 3 of this SNCR boiler flue gas denitration system are molten including urea
Groove 14 and urea liquid storage tank 15 are solved, the urea dissolving tank 14 and urea liquid storage tank 15 assemble agitator 16 respectively, described
Urea dissolving tank 14 is connected with urea liquid storage tank 15 by assembling the pipeline of urea delivery pump 17, for by urea dissolving tank
Urea liquid in 14 is delivered to urea liquid storage tank 15, described urea dissolving tank 14 assembling conveying worm 18 and running water
Pipe 19, the charging aperture of its conveying worm 18 are connected with the discharging opening of urea granules supply warehouse 20, and conveying worm 18 will be urinated
The urea granules that crude granule supply warehouse 20 provides are quantitatively transferred in urea dissolving tank 14, and running water pipe 19 is urea dissolving tank 14
Running water is provided.Described urea liquid storage tank 15 is provided with the urea liquid transfer pipeline of assembling urea liquid jet pump 21, should
Urea liquid transfer pipeline connects denitration spray gun 4.
Such as Fig. 3, the urea dissolving tank 14 and urea liquid storage tank of this SNCR boiler flue gas denitration system
It is respectively equipped with spiral shape hot-water line 22 in 15, described spiral shape hot-water line 22 is by assembling the circulation line of hot water circulating pump 23
Boiler hot water tank 24 is connected, for the urea liquid in heating urea dissolving tank 14 and urea liquid storage tank 15.
Claims (3)
1. a kind of SNCR boiler flue gas denitration system, including boiler（1）, compressed air system（2）, urea it is molten
Liquid supply system（3）And denitration spray gun（4）, it is characterized in that：By compressed air system（2）The compressed air of offer and molten by urea
Liquid supply system（3）The urea liquid of offer is connected to denitration spray gun by pipeline（4）, it is assemblied in boiler（1）On membrane wall
Multiple denitration spray guns（4）It is ejected into after compressed air is mixed with urea liquid in burner hearth high-temperature region；Described denitration spray gun（4）
Overcoat with coaxial line assembling（5）, inner tube（6）Be placed in overcoat（5）With inner tube（6）Between mozzle（7）, the overcoat
（5）Front end connection nozzle（8）, said inner tube（6）Front end connection nozzle core（9）, the nozzle core（9）With the nozzle
（8）The face of cylinder of cooperation is provided with spiral shape guiding gutter（10）, the overcoat（5）Rear end and said inner tube（6）Rear end connect
Connect, the mozzle（7）Rear end be connected to the overcoat（5）Rear portion, the overcoat（5）Rear portion connect provided with inner tube gas circuit
Mouthful（11）, overcoat air-path interface（12）With urea liquid interface（13）.
2. SNCR boiler flue gas denitration system according to claim 1, it is characterized in that：Described urea
Solution feeding system（3）Including urea dissolving tank（14）With urea liquid storage tank（15）, the urea dissolving tank（14）And urea
Solution reservoir（15）Agitator is assembled respectively（16）, the urea dissolving tank（14）With urea liquid storage tank（15）Urinated by assembling
Plain delivery pump（17）Pipeline be connected, described urea dissolving tank（14）Assemble conveying worm（18）And running water pipe
（19）, the conveying worm（18）Charging aperture and urea granules supply warehouse（20）Discharging opening be connected, described urea
Solution reservoir（15）Provided with assembling urea liquid jet pump（21）Urea liquid transfer pipeline.
3. SNCR boiler flue gas denitration system according to claim 2, it is characterized in that：Described urea
Dissolving tank（14）With urea liquid storage tank（15）Inside it is respectively equipped with spiral shape hot-water line（22）, described spiral shape hot-water line（22）
By assembling hot water circulating pump（23）Circulation line connection boiler hot water tank（24）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720987568.6U CN207169399U (en) | 2017-08-09 | 2017-08-09 | SNCR boiler flue gas denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720987568.6U CN207169399U (en) | 2017-08-09 | 2017-08-09 | SNCR boiler flue gas denitration system |
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| Publication Number | Publication Date |
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| CN207169399U true CN207169399U (en) | 2018-04-03 |
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ID=61744494
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| CN201720987568.6U Active CN207169399U (en) | 2017-08-09 | 2017-08-09 | SNCR boiler flue gas denitration system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603485A (en) * | 2018-11-14 | 2019-04-12 | 西安建筑科技大学 | A kind of dissolution preparation process technique of coal-fired flue gas denitration agent |
| CN112403251A (en) * | 2020-12-12 | 2021-02-26 | 江苏徐矿综合利用发电有限公司 | Low-load denitration system of circulating fluidized bed boiler |
| CN112856445A (en) * | 2020-12-28 | 2021-05-28 | 上海域德环保工程有限公司 | Adjustable injection urea can get rid of waste heat stove of flying dust |
-
2017
- 2017-08-09 CN CN201720987568.6U patent/CN207169399U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603485A (en) * | 2018-11-14 | 2019-04-12 | 西安建筑科技大学 | A kind of dissolution preparation process technique of coal-fired flue gas denitration agent |
| CN109603485B (en) * | 2018-11-14 | 2021-06-01 | 西安建筑科技大学 | Dissolving preparation process technology of coal-fired flue gas denitration agent |
| CN112403251A (en) * | 2020-12-12 | 2021-02-26 | 江苏徐矿综合利用发电有限公司 | Low-load denitration system of circulating fluidized bed boiler |
| CN112856445A (en) * | 2020-12-28 | 2021-05-28 | 上海域德环保工程有限公司 | Adjustable injection urea can get rid of waste heat stove of flying dust |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181109 Address after: 110000 Liaoning free trade pilot area Shenyang area 109-1, 2 level 247-2211 room. Patentee after: Liaoning Mingxin Green Environmental Engineering Co., Ltd. Address before: 066000 85 Qinshan Road, Qinhuangdao, Hebei Patentee before: Zhao Wenqiang |
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| TR01 | Transfer of patent right |