CN109959023A - It is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium and method - Google Patents
It is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium and method Download PDFInfo
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- CN109959023A CN109959023A CN201910309341.XA CN201910309341A CN109959023A CN 109959023 A CN109959023 A CN 109959023A CN 201910309341 A CN201910309341 A CN 201910309341A CN 109959023 A CN109959023 A CN 109959023A
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- 239000003245 coal Substances 0.000 title claims abstract description 142
- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003546 flue gas Substances 0.000 claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 9
- 239000000446 fuel Substances 0.000 claims abstract description 8
- 238000010298 pulverizing process Methods 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 239000003517 fume Substances 0.000 claims abstract description 6
- 239000002817 coal dust Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 1
- 238000000227 grinding Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 description 12
- 238000010304 firing Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
Classifications
-
- 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
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- 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
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/20—Drying
Abstract
The present invention provide it is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium and method, structure is simple, setting rationally, make full use of Boiler Furnace cigarette, can satisfy the requirement for grinding high-moisture coal.The system comprises fuel pulverizing plants and fume extraction device；The fuel pulverizing plant includes sequentially connected feeder, coal pulverizer and tailing separator；The coal powder entrance of the discharge connection boiler of tailing separator；Economizer is provided in the flue of boiler, air-introduced machine is arranged in flue outlet；The fume extraction device includes the high-temperature flue gas access for connecting economizer gas approach all the way, the moderate oven cigarette access of economizer exit flue is connected all the way, the low-temperature furnace smoke access of air-introduced machine exhaust pass is connected all the way, No. three furnace cigarette accesses are respectively connected to mixed pipe line input terminal, mixed pipe line output end successively connects coal pulverizer through furnace cigarette blower, is passed through mixed flue gas as dry and explosion-proof medium.
Description
Technical field
It is specially a kind of using furnace cigarette as the blowing powder producing of dried medium the invention belongs to coal-fired power generator set field
System and method.
Background technique
Pulverized coal preparation system is the important component of generating plant pulverized coal boiler combustion system, main function be coal dust preparation and
Conveying, the coal dust of qualified fineness and the wind powder mixture of suitable temperature are provided for boiler.Pulverized-coal fired boiler according to fuel performance not
Together, meager coal anthracite-fired boiler, bituminous coal fired boiler and boiler using brown coal can be divided into, the design of pulverized coal preparation system is carried out according to the difference of coal
Type selecting, usually a kind of pulverized coal preparation system are only applicable to a kind of coal of property.
Under current coal market variation complexity and the frequent situation of coal price risk, lignite, meager coal, anthracite and cigarette
The price of coal often has larger gap, and fluctuating range is larger, and this pulverized coal preparation system for being only applicable to single coal is in very great Cheng
The coal-fired buying economy and fuel supply security of power plant are affected on degree.
It is dry often to occur pulverized coal preparation system when grinding high-moisture coal for traditional pressurized direct pulverizing coal system station boiler
Undercapacity phenomenon seriously affects boiler on-load ability.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of using furnace cigarette as the direct-firing system of dried medium
Powder system and method, structure is simple, and setting rationally, makes full use of Boiler Furnace cigarette, can satisfy the requirement for grinding high-moisture coal.
The present invention is to be achieved through the following technical solutions:
It is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, including fuel pulverizing plant and fume extraction device；
The fuel pulverizing plant includes sequentially connected feeder, coal pulverizer and tailing separator；The coal of tailing separator
The coal powder entrance of powder outlet connection boiler；Economizer is provided in the flue of boiler, air-introduced machine is arranged in flue outlet；
The fume extraction device includes the high-temperature flue gas access for connecting economizer gas approach all the way, and connection saves all the way
The moderate oven cigarette access of coal device exhaust pass connects the low-temperature furnace smoke access of air-introduced machine exhaust pass, No. three furnace cigarette accesses all the way
It is respectively connected to mixed pipe line input terminal, mixed pipe line output end successively connects coal pulverizer through furnace cigarette blower, is passed through mixed flue gas work
For dry and explosion-proof medium.
Preferably, high-temperature flue gas is set on high-temperature flue gas access and adjusts door, moderate oven cigarette tune is set on moderate oven cigarette access
Section door, setting low-temperature furnace smoke adjusts door on low-temperature furnace smoke access, and setting mixing adjusts door on mixed pipe line；Furnace cigarette fan outlet warp
Furnace cigarette fan outlet adjusts door and connects coal pulverizer with furnace cigarette fan outlet cut-off gate.
Preferably, coal powder entrance of the outlet of tailing separator through pulverized coal distributor connection coal burner, coal dust firing
The coal powder entrance of the outlet connection boiler of device, isolation door are arranged between pulverized coal distributor and coal burner.
Further, be provided with the air preheater positioned at economizer downstream in the flue of boiler, air preheater it is secondary
Wind entrance connects the outlet of pressure fan, and the Secondary Air outlet of air preheater is through the Secondary Air of secondary air box connection coal burner
Entrance.
Further, the outlet of the heat primary air entrance connection primary air fan of air preheater, the heat one of air preheater
The First air entrance of secondary wind outlet connection coal pulverizer.
Further, the outlet of primary air fan is also respectively connected with the First air entrance of coal pulverizer and the entrance of seal fan；
The outlet of seal fan is separately connected to coal pulverizer, tailing separator and feeder, for providing seal gas.
Further, the heat primary air outlet of air preheater successively adjusts door through hot wind and connects mill with apparatus for measuring air quantity
The First air entrance of coal machine；The outlet connection hot wind of primary air fan adjusts the arrival end of door.
Preferably, the entrance coal supply of raw coal bucket outlet connection feeder.
It is a kind of using furnace cigarette as the blowing powder producing method of dried medium, comprising the following steps:
1) by the moderate oven cigarette of the high-temperature flue gas of economizer gas approach, economizer exit flue in boiler flue, and
After the low-temperature furnace smoke mixing of flue outlet, after the pressurization of furnace cigarette blower, it is sent into coal pulverizer；
2) after natural cold wind is boosted by primary air fan, a part of cold First air with pressure is divided into two-way；Pass through all the way
Pipeline is sent into seal fan, is sent into the First air entrance of coal pulverizer by pipeline all the way；
3) after natural cold wind is boosted by primary air fan, remainder forms heat primary air after air preheater heats and send
Enter coal pulverizer；
4) cold First air, heat primary air and holding furnace cigarette are mixed with the raw coal for being sent into coal pulverizer by feeder, are ground out
Coal dust hot wind conveying under by coal dust classifier feeding coal burner, by burning in coal burner tissue Boiler Furnace.
Preferably, natural cold wind is after pressure fan is pressurizeed, and after being heated to predetermined temperature into air preheater, passes through pipe
Secondary air box is sent on road, then is sent into boiler through coal burner.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention can be according to the requirement of different types of coal, the high temperature for being extracted boiler tail different zones using furnace cigarette blower
It is used as high-temperature medium after furnace cigarette, moderate oven cigarette, low-temperature furnace smoke mixing, the coal pulverizer for being sent into middling speed is mentioned as dry and explosion-proof medium
The drying capacity of high pulverized coal preparation system, for being required to through the adjustment to three tunnel fume extraction amounts to flue gas for different coals
Temperature is controlled, and is carried coal dust eventually by tailing separator and be passed into boiler, will not influence shape whole in boiler
State balance；Pulverized coal preparation system can be effectively improved to the adaptability of coal by direct-firing pulverized coal preparation system.
Further, mixed flue gas with coal pulverizer inlet hot wind is a certain proportion of mix after grind into pulverized coal preparation system
The mixing of raw coal, coal pulverizer inlet hot wind and cold wind, which is realized, adjusts the temperature for being passed through fresh air, so as to preferably to coal-grinding
Atmosphere temperature in machine carries out secondary adjustment and cooperation, preferably adapts to corresponding coal.
Detailed description of the invention
Fig. 1 is that the present invention is a kind of using furnace cigarette as the structural schematic diagram of the novel unit pulverized-coal system of dried medium.
Wherein: 1, boiler；2, air preheater；3, pressure fan；4, primary air fan；5, seal fan；6, coal pulverizer；7, thick
Powder separator；8, apparatus for measuring air quantity；9, raw coal bucket；10, feeder；11, pulverized coal distributor；12, completely cut off door；13, coal dust fires
Burner；14, secondary air box；15, high-temperature flue gas adjusts door；16, moderate oven cigarette adjusts door；17, low-temperature furnace smoke adjusts door；18, it mixes
It closes and adjusts door；19, furnace cigarette blower；20, furnace cigarette fan outlet adjusts door；21, furnace cigarette fan outlet cut-off gate；22, hot wind is adjusted
Door；23, economizer；24, air-introduced machine.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Referring to Fig. 1, the present invention is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, including air preheater
2, pressure fan 3, primary air fan 4, seal fan 5, coal pulverizer 6, tailing separator 7, raw coal bucket 9, feeder 10, pulverized coal distributor
11, completely cut off door 12, powder burner 13, secondary air box 14, high-temperature flue gas and adjust door 15, moderate oven cigarette adjusting door 16, low-temperature furnace smoke
Adjust door 17, mixing adjusts door 18, furnace cigarette blower 19, furnace cigarette fan outlet adjust door 20, furnace cigarette fan outlet cut-off gate 21, heat
Wind adjusts door 22, economizer 23, air-introduced machine 24.
Wherein, raw coal bucket 9 is used to be 10 coal supply of feeder, the raw coal entrance of the outlet connection coal pulverizer 6 of feeder 10, mill
The entrance of the discharge connection tailing separator 7 of coal machine 6, the entrance of the outlet connection pulverized coal distributor 11 of tailing separator 7,
The coal powder entrance of the outlet connection coal burner 13 of pulverized coal distributor 11, the wind of the outlet connection boiler 1 of coal burner 13
And coal powder entrance, isolation door 12 are arranged between pulverized coal distributor 11 and coal burner 13；
The Secondary Air entrance of the outlet connection air preheater 2 of pressure fan 3, the Secondary Air of air preheater 2 export connection
The entrance of secondary air box 14, the Secondary Air entrance of the outlet connection coal burner 13 of secondary air box 14；
The outlet of primary air fan 4 is divided into the cold First air access of two-way and heat primary air access, and the connection of heat primary air access is empty
The heat primary air entrance of air preheater 2, the First air entrance of the heat primary air outlet connection coal pulverizer 6 of air preheater 2, cold one
Secondary wind access is divided into two-way, is connected all the way with the First air entrance of coal pulverizer 6, is connected all the way with the entrance of seal fan 5, sealing
Blower 5 is used to provide seal gas to coal pulverizer 6 and tailing separator 7 and feeder 10.
It extracts 1 tail flue gas of boiler and is divided into three tunnels, 23 gas approach of economizer is connected all the way for high-temperature flue gas, all the way in
Warm furnace cigarette connects 23 exhaust pass of economizer, and low-temperature furnace smoke connects 24 exhaust pass of air-introduced machine all the way, and three road flue gases are all connected with mill
Coal machine 6 is as dry and explosion-proof medium.
Wherein, apparatus for measuring air quantity 8 and hot wind adjust door 22 and are arranged on the First air arrival end pipeline of coal pulverizer 6.
Further, high-temperature flue gas adjusting door 15 is set on 19 inlet duct of furnace cigarette blower, moderate oven cigarette adjusts door 16, low
Warm furnace cigarette adjusts door 17, mixing adjusts door 18, and setting furnace cigarette fan outlet adjusts door 20, furnace cigarette on 19 outlet conduit of furnace cigarette blower
Fan outlet cut-off gate 21.
The present invention is a kind of using furnace cigarette as the novel unit pulverized-coal system of dried medium, comprising the following steps:
1) boiler tail high-temperature flue gas, moderate oven cigarette, low-temperature furnace smoke are sent into coal pulverizer 6 after the pressurization of furnace cigarette blower 19；
2) natural cold wind after being heated to predetermined temperature into air preheater 2, passes through pipeline after the pressurization of pressure fan 3
It is sent into secondary air box 14, then is sent into boiler 1 through coal burner 13；
3) after natural cold wind is boosted by primary air fan 4, a part of cold First air with pressure is divided into two-way: passing through all the way
Pipeline is sent into seal fan 5, is sent into the First air entrance of coal pulverizer 6 by pipeline all the way；
4) after natural cold wind is boosted by primary air fan 4, a part forms heat primary air after the heating of air preheater 2 and send
Enter coal pulverizer 6；
5) cold First air, heat primary air and furnace cigarette and the raw coal for being sent into coal pulverizer 6 by run coal bin 9 and feeder 10 are mixed
It closes, the coal dust ground out is sent into coal burner 13 by coal dust classifier 7 under hot wind conveying, and coal burner 13 organizes pot
Burning in 1 furnace of furnace.
The present invention can satisfy unit pulverized-coal system and grind high-moisture coal, can adjust powder processed according to different types of coal
System entry wind-warm syndrome meets pulverized coal preparation system drying capacity, improves boiler coal adaptability, guarantees pulverized coal preparation system safety, economic fortune
Row.
Claims (10)
1. a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that including fuel pulverizing plant and flue gas
Draw-out device；
The fuel pulverizing plant includes sequentially connected feeder (10), coal pulverizer (6) and tailing separator (7)；Coarse powder separation
The coal powder entrance of discharge connection boiler (1) of device (7)；Economizer (23), flue outlet are provided in the flue of boiler (1)
It is arranged air-introduced machine (24)；
The fume extraction device includes the high-temperature flue gas access for connecting economizer (23) gas approach all the way, and connection saves all the way
The moderate oven cigarette access of coal device (23) exhaust pass connects the low-temperature furnace smoke access of air-introduced machine (24) exhaust pass, three tunnels all the way
Furnace cigarette access is respectively connected to mixed pipe line input terminal, and mixed pipe line output end successively connects coal pulverizer (6) through furnace cigarette blower (19),
Mixed flue gas is passed through as dry and explosion-proof medium.
2. according to claim 1 a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that
High-temperature flue gas is set on high-temperature flue gas access and adjusts door (15), setting moderate oven cigarette adjusts door (16) on moderate oven cigarette access, low
Low-temperature furnace smoke is set on warm furnace cigarette access and adjusts door (17), setting mixing adjusts door (18) on mixed pipe line；Furnace cigarette blower (19)
Outlet adjusts door (20) and furnace cigarette fan outlet cut-off gate (21) connection coal pulverizer (6) through furnace cigarette fan outlet.
3. according to claim 1 a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that
Coal powder entrance of the outlet of tailing separator (7) through pulverized coal distributor (11) connection coal burner (13), coal burner
(13) coal powder entrance of outlet connection boiler (1), isolation door (12) are arranged in pulverized coal distributor (11) and coal burner
(13) between.
4. according to claim 3 a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that
The air preheater (2) positioned at economizer (23) downstream, the Secondary Air of air preheater (2) are provided in the flue of boiler (1)
Entrance connects the outlet of pressure fan (3), and the Secondary Air outlet of air preheater (2) connects coal burner through secondary air box (14)
(13) Secondary Air entrance.
5. according to claim 4 a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that
The outlet of heat primary air entrance connection primary air fan (4) of air preheater (2), the heat primary air outlet of air preheater (2)
Connect the First air entrance of coal pulverizer (6).
6. according to claim 5 a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that
The outlet of primary air fan (4) is also respectively connected with the First air entrance of coal pulverizer (6) and the entrance of seal fan (5)；Seal fan
(5) outlet is separately connected to coal pulverizer (6), tailing separator (7) and feeder (10), for providing seal gas.
7. according to claim 5 a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that
The heat primary air outlet of air preheater (2) successively adjusts door (22) and apparatus for measuring air quantity (8) connection coal pulverizer (6) through hot wind
First air entrance；The outlet connection hot wind of primary air fan (4) adjusts the arrival end of door (22).
8. according to claim 1 a kind of using furnace cigarette as the unit pulverized-coal system of dried medium, which is characterized in that
The entrance coal supply of raw coal bucket (9) outlet connection feeder (10).
9. a kind of using furnace cigarette as the blowing powder producing method of dried medium, which comprises the following steps:
1) by the moderate oven of the high-temperature flue gas of economizer (23) gas approach, economizer (23) exhaust pass in boiler (1) flue
After the mixing of the low-temperature furnace smoke of cigarette and flue outlet, after furnace cigarette blower (19) pressurization, it is sent into coal pulverizer (6)；
2) after natural cold wind is boosted by primary air fan (4), a part of cold First air with pressure is divided into two-way；Pass through pipe all the way
Seal fan (5) are sent on road, are sent into the First air entrance of coal pulverizer (6) by pipeline all the way；
3) after natural cold wind is boosted by primary air fan (4), remainder forms heat primary air after air preheater (2) are heated
It is sent into coal pulverizer (6)；
4) cold First air, heat primary air and holding furnace cigarette are mixed with the raw coal for being sent into coal pulverizer (6) by feeder (10), are ground
Coal dust out is sent into coal burner (13) by coal dust classifier (7) under hot wind conveying, by coal burner (13) tissue
Burning in boiler (1) furnace.
10. Dun is a kind of using furnace cigarette as the blowing powder producing method of dried medium according to claim 9, feature exists
In natural cold wind after being heated to predetermined temperature into air preheater (2), is sent into after pressure fan (3) pressurize by pipeline
Secondary air box (14), then boiler (1) is sent into through coal burner (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309341.XA CN109959023A (en) | 2019-04-17 | 2019-04-17 | It is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309341.XA CN109959023A (en) | 2019-04-17 | 2019-04-17 | It is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium and method |
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| CN109959023A true CN109959023A (en) | 2019-07-02 |
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| CN201910309341.XA Pending CN109959023A (en) | 2019-04-17 | 2019-04-17 | It is a kind of using furnace cigarette as the unit pulverized-coal system of dried medium and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112024108A (en) * | 2020-08-17 | 2020-12-04 | 上海电力大学 | Grading heating powder making system based on heat pipe technology and control method thereof |
| CN112902146A (en) * | 2021-03-05 | 2021-06-04 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Pulverized coal boiler direct-fired biomass system and blending combustion method |
| CN113446617A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Power generation system of pulverized coal burner direct-fired coupling living beings |
| CN113446616A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Power generation system and method for directly burning and coupling biomass briquette fuel by using standby coal mill |
| CN113446615A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Biomass and coal-fired independently-operated biomass coupling power generation system of pulverized coal boiler |
| CN113685837A (en) * | 2021-08-24 | 2021-11-23 | 西安西热锅炉环保工程有限公司 | Multi-medium dry biomass direct coupling power generation system and method |
| CN113819479A (en) * | 2021-11-01 | 2021-12-21 | 西安热工研究院有限公司 | System and method for improving drying output of medium-speed coal mill based on high-temperature furnace smoke pumping |
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| CN113446616A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Power generation system and method for directly burning and coupling biomass briquette fuel by using standby coal mill |
| CN113446615A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Biomass and coal-fired independently-operated biomass coupling power generation system of pulverized coal boiler |
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