CN107327833A - A kind of low NO of boiler milling waste steamxCombustion system - Google Patents
A kind of low NO of boiler milling waste steamxCombustion system Download PDFInfo
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- CN107327833A CN107327833A CN201710698630.4A CN201710698630A CN107327833A CN 107327833 A CN107327833 A CN 107327833A CN 201710698630 A CN201710698630 A CN 201710698630A CN 107327833 A CN107327833 A CN 107327833A
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- 238000003801 milling Methods 0.000 title claims abstract description 32
- 239000002699 waste material Substances 0.000 title claims abstract description 32
- 239000003245 coal Substances 0.000 claims abstract description 113
- 239000002817 coal dust Substances 0.000 claims abstract description 86
- 238000003860 storage Methods 0.000 claims abstract description 39
- 238000002485 combustion reaction Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 10
- 238000009987 spinning Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 44
- 239000002245 particle Substances 0.000 description 10
- 238000000926 separation method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010298 pulverizing process Methods 0.000 description 5
- 235000013339 cereals Nutrition 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011044 inertial separation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/20—Burner staging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/30—Staged fuel supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1006—Mills adapted for use with furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/103—Pulverizing with hot gas supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/006—Fuel distribution and transport systems for pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/008—Feeding devices for pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/20—Feeding/conveying devices
- F23K2203/201—Feeding/conveying devices using pneumatic means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention provides a kind of low NO of boiler milling waste steamxCombustion system, including run coal bin, coal pulverizer, mill separator, pulverized-coal collector, coal dust storage warehouse, coal dust disconnecting gear and boiler-burner；The discharging opening of run coal bin is connected with the charging aperture of coal pulverizer, and the discharging opening of coal pulverizer is connected with the material inlet of mill separator；The mixed gas outlet of mill separator is connected with the feeding mouth of pulverized-coal collector, and the material outlet of mill separator is connected with the charging aperture of coal pulverizer；The mixed gas outlet of pulverized-coal collector is connected with coal dust disconnecting gear, and the material outlet of pulverized-coal collector is connected with the entrance of coal dust storage warehouse；The mixed gas outlet of coal dust disconnecting gear is connected with boiler-burner, either, and the mixed gas outlet of coal dust disconnecting gear is connected with boiler-burner, and its material outlet is connected with the entrance of coal dust storage warehouse.Using the combustion system of the present invention, effect is：Structure is simplified, easy to operate, and efficient burning milling waste steam and can realize low NOx drainage.
Description
Technical field
The present invention relates to thermal power generating technology field, especially, it is related to a kind of low NO of boiler milling waste steamxCombustion system.
Background technology
Bin storage type pulverizing system based on low speed coal mill is most widely used powder system processed in generating plant pulverized coal boiler
Still containing about in weary gas of the breeze airflow that low speed coal mill is exported in system, the system after traditional pulverized-coal collector separation
Method 10-15% or so microfine coal particle, the processing that the weary gas of ultra-fine grain is contained to this part annoyings firepower hair always
Electric industry and boiler combustion engineers and technicians.
At present, generally this strand of weary pneumatic transmission is entered and burnt in the tertiary air nozzle of boiler-burner.Due to milling waste steam processed
Flow is larger, and coal powder density is relatively low, and the method for operation and number change of coal pulverizer are more frequent in addition, so as to cause milling waste steam processed
The operation of boiler can be adversely affected, be mainly reflected in when in feeding boiler：(1) feeding of weary gas can make the burning of boiler
Stability is reduced, so as to influence the security of boiler operatiopn；(2) feeding of milling waste steam processed can increase the unburned carbon in flue dust of boiler
Plus, so as to reduce the efficiency of combustion of fuel and the thermal efficiency of boiler controller system；(3) traditional milling waste steam processed feeding and combustion system,
The NO of boiler furnace outlet can be madexGrowing amount is dramatically increased, so as to influence operation and the NO of downstream denitrating systemxQualified discharge；
(4) feeding of milling waste steam processed can also be adversely affected to the temperature characterisitic of the mistake hot vapour and hot vapour again of boiler, reduce boiler machine
Group is to coal characteristic and the adaptability of load variations.
In summary, be badly in need of a kind of structure simplify, it is easy to operate, efficient burning milling waste steam and low NO can be realizedxDischarge
System to solve problems of the prior art.
The content of the invention
Simplified it is an object of the invention to provide a kind of structure, it is easy to operate, efficient burning milling waste steam and can realize low
The system of NOx emission, concrete technical scheme is as follows：
A kind of low NO of boiler milling waste steamxCombustion system, including the separation of run coal bin, coal pulverizer, mill separator, fine powder
Device, coal dust storage warehouse, coal dust disconnecting gear and boiler-burner；
The discharging opening of the run coal bin is connected by feeder with the charging aperture of the coal pulverizer, the discharging of the coal pulverizer
Mouth is connected with the material inlet of the mill separator；
The mixed gas outlet of the mill separator is connected with the feeding mouth of the pulverized-coal collector, the coarse powder separation
The material outlet of device is connected with the charging aperture of the coal pulverizer；
The mixed gas outlet of the pulverized-coal collector is connected with the feeding mouth of the coal dust disconnecting gear, the fine powder point
Material outlet from device is connected with the entrance of the coal dust storage warehouse；
The mixed gas outlet of the coal dust disconnecting gear is connected with the boiler-burner, either, the coal
The mixed gas outlet of powder separator is connected with the boiler-burner, and material outlet and the institute of the coal dust disconnecting gear
State the entrance connection of coal dust storage warehouse.
Preferred in above technical scheme, the coal dust disconnecting gear includes Membrane Separator Cylinder for CFB Boiler and rotary blade device；
The Membrane Separator Cylinder for CFB Boiler includes the body with cavity and is respectively provided with weary gas entrance, air on the body
Outlet and discharge, the weary gas entrance connect the mixed gas outlet of the cavity and the pulverized-coal collector, described weary
The weary autogenous cutting that gas entrance enters is into the entrance cavity；The air outlet slit connects the cavity and the boiler-burner
Burnout degree nozzle or top burnout degree nozzle；The discharge is connected with the entrance of the coal dust storage warehouse；
The rotary blade device includes rotary blade and motor, and the rotary blade provides for the air-flow of the cavity
Spinning momentum, the rotary blade is arranged on the inside of the cavity；The motor provides rotary power for the rotary blade,
The motor is arranged on the outer wall of the body.
Preferred in above technical scheme, the discharge is pyramidal structure wide at the top and narrow at the bottom, its upper end with described
The lower end of body is connected and connected with the cavity, and its lower end is connected with the entrance of the coal dust storage warehouse.
Preferred in above technical scheme, the weary gas entrance is arranged on the top of the body, and the air outlet slit is set
The top center in the body is put, the top of the body is additionally provided with explosion-proof valve.
Preferred in above technical scheme, the rotary blade is arranged on the top of the cavity, and institute by support frame
State the lower section that rotary blade is located at the weary gas entrance；
The motor is variable-frequency motor, and the output shaft end of the motor is provided with the first angular wheel, the rotary blade
The end of rotary shaft be provided with the second angular wheel for matching with first angular wheel.
Preferred in above technical scheme, the entrance of the material outlet of the pulverized-coal collector and the coal dust storage warehouse connects
Flapper is equipped with logical pipeline and on pipeline that the discharge is connected with the entrance of the coal dust storage warehouse.
Preferred in above technical scheme, the coal dust disconnecting gear includes inspissator body and impeller rotary part；
The inspissator body include cylinder and the weary gas that is arranged on simultaneously on the cylinder with cavity enter pipe,
Dilute-phase pneumatic flow fairlead and concentrated phase air-flow fairlead, the weary gas enter pipe and connect the mixed of the cavity and the pulverized-coal collector
Gas vent is closed, the weary gas enters the weary autogenous cutting of pipe entrance into the entrance cavity；The dilute-phase pneumatic flow fairlead and institute
State burnout degree nozzle or the connection of top burnout degree nozzle of boiler-burner；The concentrated phase air-flow fairlead and the boiler combustion
The connection of burner noz(zle) again on the main burning nozzle of device；
The impeller rotary part includes impeller and motor, and the impeller provides rotation for the air-flow in the cavity
Momentum, the impeller is arranged on the inside of the cavity；The motor provides rotary power, the motor for the impeller
On the outer wall for being arranged on the cylinder.
Preferred in above technical scheme, the motor is variable-frequency motor；
The output the tip of the axis of the motor is provided with angular wheel A, and the end of the rotary shaft of the impeller is provided with and institute
State the angular wheel B that angular wheel A matches；
Either, the impeller is arranged on the output shaft of the motor.
Preferred in above technical scheme, the inlet pipeline of the burnout degree nozzle of the boiler-burner is provided with magnetic valve
And flow measurement device；
The pivot angle up and down of the burnout degree nozzle is ± 30 °, and its horizontal pivot angle is ± 15 °.
Preferred, the pipe that the air outlet slit is connected with the burnout degree nozzle of the boiler-burner in above technical scheme
Electronic wind is equipped with road and on pipeline that the weary gas is connected into pipe with the mixed gas outlet of the pulverized-coal collector
Door；
The entrance of the MOD is also connected with the delivery outlet and/or the coal dust storage warehouse of the feeder.
Using the stove milling waste steam high efficency low NOx combustion system of the present invention, effect is：
1st, pulverized-coal fired boiler milling waste steam high efficency low NOx combustion system technology of the invention can be not only used in active service coal-burning boiler
Between warehouse formula milling waste steam combustion system transformation, to improve boiler and pulverized coal preparation system to coal and the adaptability of load, operation
Reliability, operational flexibility and economy, it can also be used to the design of newly-built coal-fired power station boiler combustion system and pulverized coal preparation system.
2nd, compared with traditional milling waste steam combustion technology processed, system of the invention has following technical advantage：1. it can show
Write the stability and the efficiency of combustion of ultra-fine grain in weary gas for improving burning；2. the NOx lifes of boiler furnace outlet can be significantly reduced
Cheng Liang；3. by laying wall with refractory lining, refracto in main burner upper area, the flue-gas temperature that can significantly improve boiler furnace outlet is special
Property, and then it is effectively improved the overheating steam temperature and reheat steam temperature characteristic of boiler；4. during coal load variations, it is possible to achieve efficiently combustion
Burning, excessively low NOx drainage, hot vapour and cooperateing with that steam temperature again is adjusted, run so as to significantly improve boiler controller system powder with combustion system
Reliability and flexibility.
3rd, combustion system of the invention is based primarily upon efficiently separating with concentration technique (i.e. for microfine coal in milling waste steam processed
Coal dust disconnecting gear in invention), its main two ways of processing to milling waste steam processed：1. it will be made using efficient cyclone technology
Microfine coal particle in milling waste steam is separated, then that the ultra-fine grain separated is straight through coal dust storage warehouse and feeder
The First air nozzle (main burner) tapped into boiler-burner is burnt, and by the air containing very small amount ultra-fine grain
Send into OFA (top burnt wind) nozzles or SOFA (independent overhead burnt wind) nozzle of boiler-burner；2. it is high using fine grained
Effect concentration technique carries out milling waste steam processed to be concentrated to give deep or light two strands of air-flows, then again that the more concentrated phase containing pulverized coal particle is ultra-fine
Pulverized coal particle air-flow sends into the burner noz(zle) again on the First air nozzle top of boiler-burner as reburning fuel, and will contain coal dust
OFA (top burnt wind) nozzles or SOFA that the less dilute-phase pneumatic flow of particle sends into boiler-burner as burnt wind are (independent to push up
Portion's burnt wind) nozzle.
4th, in order that boiler has foot when coal characteristic, load and operation of coal pulverizing mills and input number of units change
Enough firing optimization means are to realize that high efficency low NOx burns, OFA (top burnt wind) or SOFA (independent overheads during engineering construction
Burnt wind) nozzle is designed to the nozzle that can be swung in vertical, horizontal direction, it arranges that height should be according to specific coal characteristic
Excursion is optimized；Electric adjustable should be set before OFA (top burnt wind) or SOFA (independent overhead burnt wind) nozzle entrance
Valve and flow measurement device are saved, to carry out live whole and optimization in coal and load variations.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to accompanying drawings, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the low NO of boiler milling waste steam in embodiment 1xThe structure diagram of combustion system；
Fig. 2 is the structural representation of the coal dust disconnecting gear in Fig. 1；
Fig. 3 is the low NO of boiler milling waste steam in embodiment 2xThe structure diagram of combustion system；
Fig. 4 is the structural representation of the coal dust disconnecting gear in Fig. 2；
1st, run coal bin, 2, coal pulverizer, 3, mill separator, 4, pulverized-coal collector, 5, coal dust storage warehouse, 6, coal dust separation dress
Put, 6.1, Membrane Separator Cylinder for CFB Boiler, 6.11, body, 6.111, cavity, 6.12, weary gas entrance, 6.13, air outlet slit, 6.14, coal dust
Outlet, 6.2, rotary blade device, 6.21, rotary blade, 6.22, motor, 6.23, support frame, 6.3, explosion-proof valve, 6.4, concentration
Device body, 6.41, cylinder, 6.411, cavity, 6.42, weary gas enter pipe, 6.43, concentrated phase air-flow fairlead, 6.44, dilute-phase pneumatic flow
Fairlead, 6.5, impeller rotary part, 6.51, impeller, 6.52, motor, 7, boiler-burner, 7.1, burnout degree nozzle or top
Portion's burnout degree nozzle, 7.2, main burning nozzle, 7.3, burner noz(zle) again, 7.4, flue outlet, 8, feeder, 9, flapper, 10,
Magnetic valve, 11, MOD, 12, cold wind enter pipe, 13, hot blast enter pipe, 14, protective cover.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
Embodiment 1：
A kind of low NO of boiler milling waste steamxCombustion system, refers to Fig. 1, specifically includes run coal bin 1, coal pulverizer 2, coarse powder point
From device 3, pulverized-coal collector 4, coal dust storage warehouse 5, coal dust disconnecting gear 6 and boiler-burner 7, specific annexation is as follows：
The discharging opening of the run coal bin 1 is connected by feeder 8 with the charging aperture of the coal pulverizer 2, the coal pulverizer 2
Discharging opening is connected with the material inlet of the mill separator 3.The coal pulverizer 2 simultaneously with cold air duct 12, hot air duct 13
And MOD 11.
The mixed gas outlet of the mill separator 3 is connected with the feeding mouth of the pulverized-coal collector 4, the coarse powder point
Material outlet from device 3 is connected with the charging aperture of the coal pulverizer 2.The charging aperture of coal pulverizer 2 also enters pipe 12 with extraneous cold wind
Connected with hot blast into pipe 13.
The mixed gas outlet of the pulverized-coal collector 4 is connected with the feeding mouth of the coal dust disconnecting gear 6, the fine powder
The material outlet of separator 4 is connected with the entrance of the coal dust storage warehouse 5.
The mixed gas outlet of the coal dust disconnecting gear 6 is connected with the boiler-burner 7, and the coal dust point
Material outlet from device 6 is connected with the entrance of the coal dust storage warehouse 5.Boiler-burner upper end is additionally provided with flue outlet 7.3.
The structure of above-mentioned coal dust disconnecting gear 6 refers to Fig. 2, specifically includes Membrane Separator Cylinder for CFB Boiler 6.1 and rotary blade device
6.2, detailed construction is as follows：
The Membrane Separator Cylinder for CFB Boiler 6.1 includes the body 6.11 with cavity 6.111 and is arranged at the body 6.11
On weary gas entrance 6.12, air outlet slit 6.13 and discharge 6.14；The weary gas entrance 6.12 is arranged on the body
6.11 top, it is used for the mixed gas outlet for connecting the cavity 6.111 and the pulverized-coal collector 4, and the weary gas enters
The weary autogenous cuttings that mouth 6.12 enters are into the entrance cavity 6.111；The air outlet slit 6.13 is arranged on the body 6.11
Top center, it is used for the burnout degree nozzle or top burnout degree that connect the cavity 6.111 and the boiler-burner 7
Nozzle 7.1；The discharge 6.14 is connected with the entrance of the coal dust storage warehouse 5.The top of the body 1.1 is additionally provided with anti-
Quick-fried valve 6.3.The discharge 6.14 be pyramidal structure wide at the top and narrow at the bottom, its upper end be connected with the lower end of the body 6.11 and
Connected with the cavity 6.111, its lower end is connected with the coal dust storage warehouse 5.
The rotary blade device 6.2 includes rotary blade 6.21 and motor 6.22, and the rotary blade 6.21 is institute
The air-flow for stating cavity 6.111 provides spinning momentum, and the rotary blade 6.21 is arranged on the inside of the cavity 6.111；It is described
Motor 6.22 is that the rotary blade 6.21 provides rotary power, and the motor 6.22 is arranged on the outer wall of the body 6.11
On.Specifically：
The rotary blade 6.21 is arranged on the top of the cavity 6.111, and the pivoting leaf by support frame 6.23
Wheel 6.21 is located at the lower section of the weary gas entrance 6.12.
The motor 6.22 is variable-frequency motor, and the output shaft end of the motor 6.22 is provided with the first angular wheel, described
The end of the rotary shaft of rotary blade 6.21 is provided with the second angular wheel matched with first angular wheel.First taper
Gear and the second angular wheel are arranged inside protective cover 14.
It is on the pipeline that the material outlet of the pulverized-coal collector 4 is connected with the entrance of the coal dust storage warehouse 5 and described
Flapper 9 is equipped with the pipeline that discharge 6.14 is connected with the entrance of the coal dust storage warehouse 5.
The inlet pipeline of the burnout degree nozzle 7.1 of the boiler-burner 7 is provided with magnetic valve 10 and flow measurement device；
The pivot angle up and down of the burnout degree nozzle 7.1 is ± 30 °, and its horizontal pivot angle is ± 15 °.
The pipeline that the air outlet slit 6.13 is connected with the burnout degree nozzle 7.1 of the boiler-burner 7 is provided with electronic
Air door 11, the entrance of the MOD 11 is also connected with the delivery outlet and the coal dust storage warehouse 5 of the feeder 8 simultaneously.
Using the combustion system of the present embodiment, it is specifically：
Coal dust in bin storage type pulverizing system in run coal bin 1 enters coal pulverizer 2 (herein using steel ball through feeder 8
Coal pulverizer) or the direct main burning nozzle 7.2 for being directly entered boiler-burner 7 through MOD 11 again；
Discharging opening of the breeze airflow through coal pulverizer 2 after levigate enters the material inlet of mill separator 3；Breeze airflow is passed through
Mill separator 3 is separated into coal dust mixed airflow and pulverized coal particle, and mixed gas of the coal dust mixed airflow through mill separator 3 goes out
Mouth enters the feeding mouth of the pulverized-coal collector 4, and material outlet of the pulverized coal particle through mill separator 3 is back to the coal-grinding
The charging aperture of machine 2, subsequently into flour mill 2；
Coal dust mixed airflow is separated into mixed airflow containing microfine coal and coal dust particulate through pulverized-coal collector 4, containing fine Coal
Mixed gas outlet of the powder mixed airflow through pulverized-coal collector 4 enters the weary gas entrance 6.12 of the coal dust disconnecting gear 6, then
Into in coal dust disconnecting gear 6 in the cavity 6.111 of Membrane Separator Cylinder for CFB Boiler 6.1；Material of the coal dust particulate through the pulverized-coal collector 4
Outlet enters the entrance of the coal dust storage warehouse 5, subsequently into the coal dust storage warehouse, after can directly enter through MOD 11
Enter the main burning nozzle 7.2 of boiler-burner 7；
Mixed airflow containing microfine coal is separated into Pulverized Coal and air through coal dust disconnecting gear 6, and air is through MOD 11
The burnout degree nozzle or top burnout degree nozzle 7.1 of boiler-burner 7 are directly entered, is realized efficient low based on air classification
NOx combustion；Material outlet of the Pulverized Coal through the coal dust disconnecting gear 6 enters the entrance of the coal dust storage warehouse 5, subsequently into
In the coal dust storage warehouse, after the main burning nozzle 7.2 of boiler-burner 7 can be directly entered through MOD 11.
Burnout degree nozzle or top burnout degree nozzle are designed to the nozzle that can be swung in vertical, horizontal direction, and it is arranged
Height should be optimized according to specific coal characteristic excursion.
Motor regulated valve and flow measurement device should be set before burnout degree nozzle or top burnout degree nozzle entrance, so as to
Scene is carried out in coal and load variations whole with optimizing.
Using the technical scheme of the present embodiment, effect is：
1st, combustion system structure is simplified, and big space will not be taken and without laying for bin storage type pulverizing system
Complicated pipeline, industrial applications are convenient.
2nd, the composite mode that coal dust disconnecting gear is separated using inertial separation and rotary blade, greatly improves coal dust separation effect
Really, it is specifically：Weary gas air-flow containing microfine coal particle rotates at a high speed in Membrane Separator Cylinder for CFB Boiler, surpasses the part in air-flow
Fine grained is separated, and is got rid of under the influence of centrifugal force to the internal face of Membrane Separator Cylinder for CFB Boiler, and this partial particulate is along cylinder
Wall falls to entering discharge；Descending with the rotation of air-flow, its momentum (particularly spinning momentum) decay is very fast, now,
This strand of descending air-flow obtains spinning momentum again because of the high speed rotation of rotary blade, thus continue under the influence of centrifugal force by
Separation, realizes the high efficency low NOx burning based on air classification.
3rd, the present embodiment combustion system can be not only used for changing for active service coal-burning boiler centre warehouse formula milling waste steam combustion system
Make, to improve boiler and pulverized coal preparation system to coal and the adaptability of load, operational reliability, operational flexibility and economy,
Design available for newly-built coal-fired power station boiler combustion system and pulverized coal preparation system.
Embodiment 2
A kind of low NO of boiler milling waste steamxCombustion system, refers to Fig. 3, and difference from Example 1 is：
1st, the mixed gas outlet of the coal dust disconnecting gear 6 is connected with the air inlet of the boiler-burner 7.
2nd, the structure of the coal dust disconnecting gear refers to Fig. 4, is specifically：Rotated including inspissator body 6.4 and impeller
Part 6.5, Details as Follows：
The inspissator body 6.4 includes the cylinder 6.41 with cavity 6.411 and is arranged on the cylinder simultaneously
Weary gas on 6.41 enters pipe 6.42, concentrated phase air-flow fairlead 6.43 and dilute-phase pneumatic flow fairlead 6.44, and the weary gas enters pipe
The mixed gas outlet of the 6.42 connection cavitys 6.411 and the pulverized-coal collector 4, the weary gas enters what pipe 6.42 entered
Weary autogenous cutting is into the entrance cavity 6.411；The burnout degree of the dilute-phase pneumatic flow fairlead 6.44 and the boiler-burner 7 sprays
Mouth or top burnout degree nozzle 7.1 are connected；The main burning nozzle of the concentrated phase air-flow fairlead 6.43 and the boiler-burner 7
Burner noz(zle) again 7.3 on 7.2 is connected.The weary gas enters the mixed gas outlet of pipe 6.42 and the pulverized-coal collector 4
The pipeline of connection is provided with MOD 11.
The impeller rotary part 6.5 includes impeller 6.51 and motor 6.52, and the impeller 6.51 is the cavity
Air-flow in 6.411 provides spinning momentum, and the impeller 6.51 is arranged on the inside of the cavity 6.411；The motor
6.52 be that the impeller 6.51 provides rotary power, and the motor 6.52 is arranged on the outer wall of the cylinder 6.41.It is described
Motor 6.52 is variable-frequency motor；The impeller 6.51 is arranged on the output shaft of the motor 6.52.Impeller and motor
Connection can also be in the following ways：The output the tip of the axis of the motor 6.52 is provided with angular wheel A, the impeller
It is equal that the end of 6.51 rotary shaft is provided with the angular wheel B, angular wheel A and angular wheel B matched with the angular wheel A
It is arranged on inside protective cover.
Using the combustion system of the present embodiment, it is specifically：
Coal dust in bin storage type pulverizing system in run coal bin 1 enters coal pulverizer 2 (herein using steel ball through feeder 8
Coal pulverizer) or the direct main burning nozzle 7.2 for being directly entered boiler-burner 7 through MOD 11 again；
Discharging opening of the breeze airflow through coal pulverizer 2 after levigate enters the material inlet of mill separator 3；Breeze airflow is passed through
Mill separator 3 is separated into coal dust mixed airflow and pulverized coal particle, and mixed gas of the coal dust mixed airflow through mill separator 3 goes out
Mouth enters the feeding mouth of the pulverized-coal collector 4, and material outlet of the pulverized coal particle through mill separator 3 is back to the coal-grinding
The charging aperture of machine 2, subsequently into flour mill 2；
Coal dust mixed airflow is separated into mixed airflow containing microfine coal and coal dust particulate through pulverized-coal collector 4, containing fine Coal
Mixed gas outlet and MOD 11 of the powder mixed airflow through pulverized-coal collector 4 are directly entered the coal dust disconnecting gear 6
Weary gas enters in pipe 6.42, subsequently into the cavity 6.411 of inspissator body 6.4 in coal dust disconnecting gear 6；Coal dust particulate is passed through
The material outlet of the pulverized-coal collector 4 enters the entrance of the coal dust storage warehouse 5, subsequently into the coal dust storage warehouse,
The main burning nozzle 7.2 of boiler-burner 7 can be directly entered through MOD 11 afterwards；
Mixed airflow containing microfine coal is separated into concentrated phase air-flow and dilute-phase pneumatic flow, concentrated phase air-flow warp through coal dust disconnecting gear 6
Burner noz(zle) 7.3 again that concentrated phase air-flow fairlead 6.43 enters on the main burning nozzle of boiler-burner 7, dilute-phase pneumatic flow is through dilute
Phase air-flow fairlead 6.44 enters the burnout degree nozzle or top burnout degree nozzle 7.1 of boiler-burner 7, realizes based on air point
The high efficency low NOx burning of level.
The effect of the present embodiment is suitable with the effect of embodiment.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of low NO of boiler milling waste steamxCombustion system, it is characterised in that：Including run coal bin (1), coal pulverizer (2), coarse powder point
From device (3), pulverized-coal collector (4), coal dust storage warehouse (5), coal dust disconnecting gear (6) and boiler-burner (7)；
The discharging opening of the run coal bin (1) is connected by feeder (8) with the charging aperture of the coal pulverizer (2), the coal pulverizer
(2) discharging opening is connected with the material inlet of the mill separator (3)；
The mixed gas outlet of the mill separator (3) is connected with the feeding mouth of the pulverized-coal collector (4), the coarse powder point
Material outlet from device (3) is connected with the charging aperture of the coal pulverizer (2)；
The mixed gas outlet of the pulverized-coal collector (4) is connected with the feeding mouth of the coal dust disconnecting gear (6), the fine powder
The material outlet of separator (4) is connected with the entrance of the coal dust storage warehouse (5)；
The mixed gas outlet of the coal dust disconnecting gear (6) is connected with the boiler-burner (7), either, described
The mixed gas outlet of coal dust disconnecting gear (6) is connected with the boiler-burner (7), and the coal dust disconnecting gear (6)
Material outlet is connected with the entrance of the coal dust storage warehouse (5).
2. the low NO of boiler milling waste steam according to claim 1xCombustion system, it is characterised in that：The coal dust disconnecting gear
(6) Membrane Separator Cylinder for CFB Boiler (6.1) and rotary blade device (6.2) are included；
The Membrane Separator Cylinder for CFB Boiler (6.1) includes the body (6.11) with cavity (6.111) and is arranged at the body
(6.11) weary gas entrance (6.12), air outlet slit (6.13) and discharge (6.14) on, the weary gas entrance (6.12) is even
Lead to the mixed gas outlet of the cavity (6.111) and the pulverized-coal collector (4), it is weary that the weary gas entrance (6.12) enters
Autogenous cutting is interior to the cavity (6.111) is entered；The air outlet slit (6.13) connects the cavity (6.111) and boiler combustion
The burnout degree nozzle or top burnout degree nozzle (7.1) of burner (7)；The discharge (6.14) and the coal dust storage warehouse
(5) entrance connection；
The rotary blade device (6.2) includes rotary blade (6.21) and motor (6.22), the rotary blade (6.21)
Spinning momentum is provided for the air-flow of the cavity (6.111), the rotary blade (6.21) is arranged on the cavity (6.111)
It is internal；The motor (6.22) is that the rotary blade (6.21) provides rotary power, and the motor (6.22) is arranged on described
On the outer wall of body (6.11).
3. microfine coal dynamic separator according to claim 2, it is characterised in that the discharge (1.4) is upper
Narrow pyramidal structure under width, its upper end is connected with the lower end of the body (6.11) and connected with the cavity (6.111), under it
End is connected with the entrance of the coal dust storage warehouse (5).
4. microfine coal dynamic separator according to claim 2, it is characterised in that the weary gas entrance (6.12) is set
Top in the body (6.11), the air outlet slit (6.13) is arranged on the top center of the body (6.11),
The top of the body (1.1) is additionally provided with explosion-proof valve (6.3).
5. microfine coal dynamic separator according to claim 2, it is characterised in that the rotary blade (6.21) passes through
Support frame (6.23) is arranged on the top of the cavity (6.111), and the rotary blade (6.21) is located at the weary gas entrance
(6.12) lower section；
The motor (6.22) is variable-frequency motor, and the output shaft end of the motor (6.22) is provided with the first angular wheel, described
The end of the rotary shaft of rotary blade (6.21) is provided with the second angular wheel matched with first angular wheel.
6. the low NO of boiler milling waste steam according to claim 2xCombustion system, it is characterised in that：The pulverized-coal collector
(4) on the pipeline that material outlet is connected with the entrance of the coal dust storage warehouse (5) and the discharge (6.14) and institute
Flapper (9) is equipped with the pipeline for the entrance connection for stating coal dust storage warehouse (5).
7. the low NO of boiler milling waste steam according to claim 1xCombustion system, it is characterised in that：The coal dust disconnecting gear
(6) inspissator body (6.4) and impeller rotary part (6.5) are included；
The inspissator body (6.4) includes the cylinder (6.41) with cavity (6.411) and is arranged on the cylinder simultaneously
(6.41) the weary gas on enters pipe (6.42), concentrated phase air-flow fairlead (6.43) and dilute-phase pneumatic flow fairlead (6.44), described weary
Gas enters the mixed gas outlet that pipe (6.42) connects the cavity (6.411) and the pulverized-coal collector (4), and the weary gas enters
The weary autogenous cutting for entering pipe (6.42) entrance is interior to the cavity (6.411) is entered；The dilute-phase pneumatic flow fairlead (6.44) with it is described
Burnout degree nozzle or top burnout degree nozzle (7.1) connection of boiler-burner (7)；The concentrated phase air-flow fairlead (6.43) with
Burner noz(zle) again (7.3) connection on the main burning nozzle (7.2) of the boiler-burner (7)；
The impeller rotary part (6.5) includes impeller (6.51) and motor (6.52), and the impeller (6.51) is described
Air-flow in cavity (6.411) provides spinning momentum, and the impeller (6.51) is arranged on the inside of the cavity (6.411)；Institute
State motor (6.52) and provide rotary power for the impeller (6.51), the motor (6.52) is arranged on the cylinder
(6.41) on outer wall.
8. microfine coal inspissator according to claim 7, it is characterised in that the motor (6.52) is variable-frequency electric
Machine；
The output the tip of the axis of the motor (6.52) is provided with angular wheel A, the end of the rotary shaft of the impeller (6.51)
Provided with the angular wheel B matched with the angular wheel A；
Either, the impeller (6.51) is arranged on the output shaft of the motor (6.52).
9. the low NO of boiler milling waste steam according to claim 2 or 7xCombustion system, it is characterised in that：The boiler combustion
The inlet pipeline of the burnout degree nozzle (7.1) of device (7) is provided with magnetic valve (10) and flow measurement device；
The pivot angle up and down of the burnout degree nozzle (7.1) is ± 30 °, and its horizontal pivot angle is ± 15 °.
10. the low NO of boiler milling waste steam according to claim 9xCombustion system, it is characterised in that：The air outlet slit
(6.13) on the pipeline connected with the burnout degree nozzle (7.1) of the boiler-burner (7) and the weary gas enters pipe
(6.42) it is equipped with MOD (11) on the pipeline connected with the mixed gas outlet of the pulverized-coal collector (4)；
The entrance of the MOD (11) is also connected with the delivery outlet and/or the coal dust storage warehouse (5) of the feeder (8).
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| CN201710698630.4A CN107327833B (en) | 2017-08-15 | 2017-08-15 | Low NO of boiler powder process exhaust gas x Combustion system |
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|---|---|---|---|
| CN201710698630.4A CN107327833B (en) | 2017-08-15 | 2017-08-15 | Low NO of boiler powder process exhaust gas x Combustion system |
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| CN107327833B CN107327833B (en) | 2023-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180469A (en) * | 2018-02-12 | 2018-06-19 | 东方电气集团东方锅炉股份有限公司 | A kind of method and apparatus for adjusting steam temperature using burner or milling waste steam processed |
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| CN1587800A (en) * | 2004-07-15 | 2005-03-02 | 浙江大学 | Method and system for reducing NO discharging by collecting and refiring fine coal powder in tertiary wind |
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| CN108180469B (en) * | 2018-02-12 | 2023-07-14 | 东方电气集团东方锅炉股份有限公司 | Method and device for adjusting steam temperature by using burner or powder process exhaust gas |
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