CN109990271A - A kind of method of comprehensive utilization and system of CFB Slag quenching - Google Patents
A kind of method of comprehensive utilization and system of CFB Slag quenching Download PDFInfo
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- CN109990271A CN109990271A CN201910250749.4A CN201910250749A CN109990271A CN 109990271 A CN109990271 A CN 109990271A CN 201910250749 A CN201910250749 A CN 201910250749A CN 109990271 A CN109990271 A CN 109990271A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
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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
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses the method for comprehensive utilization and system of a kind of CFB Slag quenching.The system is mainly made of chilling slag cooler, heat exchanger, bottom ash treatment device and condensing heat exchanger.It is big for CFB boiler unit bed drain purge, the problems such as sulphur utilization of ash and slag rate is low, lime stone usage amount is big and deslagging temperature is excessively high.The clinker generated by burner hearth is directly carried out contact quenching by the present invention.Generated chilling bottom ash is first dried with tail flue gas, is divided into processing unit in bottom ash ingredient and is carried out component analysis, and the high bottom ash of free CaO content sends boiler back to as desulfurizing agent again；Free CaO, CaSO4The low bottom ash of content is used as cement spike；CaSO4The high bottom ash of content is used as cement adjustable solidification agent.Flue gas after generated high-temperature steam and drying carries out heat exchange with water supply, then enters in economizer as " economizer water supply ".The present invention makes full use of afterheat of slags, saves boiler oil, reduces thermal pollution, and then improve boiler thermal efficiency.
Description
Technical field
The invention belongs to recirculating fluidized bed bottom slag process fields, and in particular at a kind of CFB Slag chilling
The method of comprehensive utilization and system of reason.
Background technique
As large circulating fluidized bed boiler (CFB) boiler widely promotes and applies.It is existing in its actual application
Problem is also outstanding day by day, seriously hinders its development and application.According to incompletely statistics, the total row of the annual desulfurization ash in China at present
High-volume at 30,000,000 tons or more, and the desulfurization ash discharge amount that CFB boiler power plant generates rises year by year.But CFB boiler uses more
Colm and sulphur coal, ash content and sulphur content content are higher in coal.Therefore it needs that the progress of large quantities of lime stone is added during burning
Desulfurization, also result in CFB boiler generation lime-ash than common coal-powder boiler lime-ash more than 30%-50%.With coal-powder boiler and cyclone furnace
The lime-ash of generation is compared, and most CFB desulfurization ash are treated as solid waste and are handled, and not only land occupation but also is made
At atmospheric dust pollution, deteriorate atmospheric environment.Contain more heavy metal element, alkaline matter and radioactive material in CFB ash slag
Matter easily leads to the raising such as underground water pH, radioactivity by the way of landfill disposal, and scale increases, and deteriorates water quality, to human body
Health generates larger harm.China's land resource scarcity per capita, the stacking of lime-ash and landfill, occupy large amount of land resources
Meanwhile harmful substance polluted soil.Therefore power plant need to spend substantial contribution to handle CFB boiler lime-ash every year.
CFB boiler unit bottom ash amount is very big, and deslagging particle is big, and ash temperature is high, it is easy to cause slag cooler blocking, knot
The problems such as coke, deslagging are difficult, deslagging temperature is excessively high influences boiler normal operation, or even is forced blowing out.When burning coal ash content compared with
When big, bed pressure is not easy to control, leads to the flowing velocity and bed drain purge that are difficult to control bottom ash, and slag cooler is not easy steady and continuous operation,
So as to cause coking and blocking.According to statistics, 60% of the total blowing out accident of blowing out accident Zhan as caused by slag cooler operation troubles
More than.For current China's CFB boiler unit emerged in operation desulfurization ash utilization rate is low, lime stone usage amount is big, boiler
The problems such as overtemperature and slag cooler high failure rate, proposes a kind of CFB boiler unit ash comprehensive utilization new method, to solve CFB
The low problem of desulfurization ash utilization rate.
Quenching is carried out to CFB boiler bottom ash, is conducive to the comprehensive utilization value for improving bottom ash.Bottom ash chilling condition
Under, lime-ash chilling has the advantages that many: (1) when lime-ash is quenched, vitreum content increases, and entringite generates in advance, reduces mortar
The swelling in material later period also improves the intensity of mortar material；(2) chilling facilitates lime-ash surface C aSO4The rupture of shell,
It is used advantageous as desulfurizing agent, if used as cement mixture, the swelling that can reduce the later period occurs；(3) certain
The desulfurization ash of water content enters burner hearth as desulfurizing agent in use, facilitating the generation of reduction burner hearth overtemperature event；(4) directly
Water cooling slag cooler mechanical part is few, and failure rate is low, small investment；(5) CFB ash slag ingredient is analyzed, is avoided to desulfurization ash
Blindness use.
Summary of the invention
It is an object of the invention in view of the above-mentioned problems, providing a kind of the comprehensive of CFB Slag quenching
It closes and utilizes method and system.The present invention not only efficiently uses boiler bottom slag, also makes full use of waste heat, reduces dirt of the bottom ash to environment
Dye reduces fuel consumption, improves the boiler system thermal efficiency.
The present invention adopts the following technical scheme that realize:
A kind of utilization system of CFB Slag quenching, including the cold slag of burner hearth, coal bunker, chilling
Device, filtering and removing slag device, heat exchanger, bottom ash constituent analysis processing unit, bottom ash storage warehouse, drying unit, sink, condensation heat transfer
Device, filtering and removing slag device, chimney, deduster and economizer；Wherein,
Burner hearth is equipped with raw coal entrance and slag outlet, and burner hearth slag outlet is connected with chilling slag cooler clinker entrance, anxious
Cold slag cooler pulp water outlet is connected with filtering and removing slag device portal, and the outlet of filtering and removing slag device is connected with exchanger heat water inlet,
Heat exchanger cooling water outlet is connected with sink return water entrance；The lime-ash outlet of chilling slag cooler is connected with drying unit lime-ash entrance,
The outlet of drying unit lime-ash is connected with bottom ash storage warehouse import, drying unit exhanst gas outlet and condensation heat transfer device smoke inlet phase
Even, drying unit smoke inlet is connected with economizer exhanst gas outlet, the outlet of bottom ash storage warehouse and bottom ash constituent analysis processing unit
Import is connected；Chilling slag cooler cold water inlet is connected with sink cooling water outlet, and chilling slag cooler steam (vapor) outlet and filtering and removing slag fill
Posting port be connected, filtering and removing slag device outlet is connected with condensation heat transfer device steam inlet, condensation heat transfer device exhanst gas outlet and
Deduster smoke inlet is connected, and house outlet is connected with chimney.
A further improvement of the present invention lies in that further including coal bunker, it is connected by transport pipeline with burner hearth raw coal entrance.
A further improvement of the present invention lies in that warm sludge water in filtering and removing slag device after filtration treatment, filled in heat exchanger
Divide heat exchange, and the heat of warm sludge water is used for heat user by heat exchanger.
A further improvement of the present invention lies in that filtering and removing slag device exports the pipe connecting with condensation heat transfer device steam inlet
Steam extraction pump is additionally provided on road.
A further improvement of the present invention lies in that further including cyclone separator, back-end surfaces and fluid bed heat heat exchanger, furnace
Thorax high-temperature flue gas outlet is connected with cyclone separator smoke inlet, cyclone separator exhanst gas outlet and back-end surfaces smoke inlet
Be connected, cyclone separator coal ash entrance is connected with fluid bed heat heat exchanger coal ash entrance, fluid bed heat heat exchanger coal ash export and
Burner hearth coal ash entrance is connected.
A further improvement of the present invention lies in that economizer is arranged in back-end surfaces, it is provided on condensation heat transfer device
Feedwater piping when work, in condensing heat exchanger, high-temperature steam and conveys the flue gas to come from drying unit, there are also and water supply
Heat exchange occurs for the water in pipeline；Flue gas emission after heat exchange passes through chimney to deduster flue gas again and is discharged into the external world；Solidifying
It ties in heat exchanger, the condensate of water supply and high-temperature steam by heat exchange is entered in economizer by economizer feedwater piping.
A further improvement of the present invention lies in that in chilling slag cooler, using 30 DEG C of cold water chilling high temperature furnace slag, clinker
Temperature is 850-900 DEG C, and high temperature furnace slag is directly contacted with low-temperature cooling water, realization lime-ash quenching, after chilling, warm sludge water from
The discharge of chilling slag cooler, is used for UTILIZATION OF VESIDUAL HEAT IN, and high-temperature steam enters condensation heat transfer system, and chilling bottom ash is pulled out by slag collector, into
Enter bottom ash recovery and processing system.
A further improvement of the present invention lies in that chilling bottom ash is transported to drying unit in drying unit through dreg removing system
It is dried with flue gas adverse current contact, flue gas is from economizer back-end ductwork；Then in bottom ash constituent analysis processing unit the bottom of to
Slag carries out component analysis and sends burner hearth back to again using the high bottom ash of free CaO content as desulfurizing agent；Free CaO, CaSO4Content
Low bottom ash is used as cement spike；CaSO4The high bottom ash of content is used as cement adjustable solidification agent, realizes the functionalization benefit of chilling bottom ash
With.
A kind of method of comprehensive utilization of CFB Slag quenching, this method are based on a kind of above-mentioned recycle stream
The utilization system of fluidized bed boiler bottom ash quenching, comprising:
Coal enters burner hearth and carries out high-temp combustion, generates high temperature furnace slag, clinker is then made to fall into chilling slag cooler, clinker and water
Fierce heat exchange occurs in chilling slag cooler；The chilling bottom ash of generation, is pulled out by slag collector, into dreg removing system；Chilling
Enter drying unit after bottom ash elder generation filtration treatment and counter current contacting formula drying is carried out to chilling bottom ash with flue gas in drying unit；
Component analysis is carried out to bottom ash in bottom ash constituent analysis processing unit, wherein the high bottom ash of free CaO content is as desulfurizing agent, weight
It newly sends and melts down thorax and be recycled, free CaO, CaSO4The low bottom ash of content is used as cement spike, CaSO4The high bottom ash of content
As cement adjustable solidification agent；Warm sludge water is after filtering and removing slag, and in heat exchanger, the heat after exchange heats for heat user, and passes through
Warm sludge water after crossing heat exchange comes back to sink；High-temperature steam is first filtered in filtering and removing slag device except Slag treatment；It is condensing
In heat exchanger, with water supply heat exchange occurs for high-temperature steam and the flue gas after drying；Then flue gas emission is removed into deduster
Dirt, then the external world is discharged by chimney, the water supply by heat exchange enters in economizer as " economizer water supply ".
The present invention has following beneficial technical effect:
A kind of utilization system of CFB Slag quenching provided by the invention, including the cold slag of chilling
Device, heat exchanger, bottom ash treatment device and condensing heat exchanger etc.；When whole system work operation, coal enters burner hearth and carries out high temperature
Burning generates high temperature furnace slag.Clinker is fallen into chilling slag cooler, becomes chilling bottom ash.Chilling bottom ash is cold from chilling by pipeline
Slag device comes drying unit.In drying unit, chilling bottom ash is dried with flue gas.Bottom ash by drying is sent to again
In bottom ash constituent analysis processing unit, component analysis then is carried out to bottom ash, using the high lime-ash of wherein free CaO content as de-
Sulphur agent sends back to burner hearth again.Warm sludge water passes through pipeline transportation into filtering and removing slag device from chilling slag cooler, and warm sludge water passes through
It after filtering out slag, is transported in heat exchanger, the warm sludge water after heat exchange comes back to sink.High-temperature steam quilt from chilling slag cooler
It is transported to filtering and removing slag device.Then it is filtered in filtering and removing slag device except Slag treatment, then is transported in condensation heat transfer
In device.In condensing heat exchanger, high-temperature steam and the flue gas to come from drying unit conveying, the water hair also and in feedwater piping
Heat exchange.To deduster, flue gas passes through chimney again and is discharged into the external world for flue gas emission after heat exchange；In condensing heat exchanger,
The condensate of water supply and high-temperature steam by heat exchange is entered in economizer by economizer feedwater piping.
Further, in chilling slag cooler, using 30 DEG C of cold water chilling high temperature furnace slag, slag temperature is 850-900 DEG C,
High temperature furnace slag is directly contacted with low-temperature cooling water, realization lime-ash quenching, after chilling, warm sludge water row on the right side of chilling slag cooler
Out, it is used for UTILIZATION OF VESIDUAL HEAT IN, high-temperature steam to enter condensation heat transfer system, and chilling bottom ash is pulled out by slag collector, at bottom ash recycling
Reason system.
Further, warm sludge water sufficiently exchanges heat in filtering and removing slag device after filtration treatment in heat exchanger.Heat exchanger is warm
The heat of pulp water is used for heat user, such as utilizes as heating etc., realizes the UTILIZATION OF VESIDUAL HEAT IN of high temperature furnace slag.
A kind of method of comprehensive utilization of CFB Slag quenching provided by the invention, in this method, (1)
Warm bottom ash and water are in contact formula heat exchange, exchange heat more thorough, reduce thermal pollution, the boiler utilization efficiency of raising；(2) free CaO
The high bottom ash of content imports burner hearth as desulfurizing agent again.Not only it had reduced the use of desulfurizing agent but also energy secondary use bottom ash, had improved
The utilization rate of bottom ash；(3) free CaO, CaSO4The low bottom ash of content is used as cement spike, and the normal consistency that can be reduced cement needs
Water promotes cement compaction rate, has positive effect to the mechanical property and corrosion resistance of cement；(4)CaSO4Content is high
Bottom ash is used as cement adjustable solidification agent, makes full use of boiler bottom slag, improves the utilization rate of bottom ash；(5) using heat exchanger warm sludge water
Heat is used for heat user, utilizes as heating, realizes the UTILIZATION OF VESIDUAL HEAT IN of high temperature furnace slag；(6) in condensing heat exchanger, high temperature steams
Flue gas after vapour and drying carries out heat exchange with water supply, then just enters in economizer as ' economizer water supply '.
In conclusion the present invention can make full use of high temperature furnace slag waste heat and save boiler oil, and then improve system
The thermal efficiency.
Detailed description of the invention
Fig. 1 is system composition schematic diagram of the invention.
Description of symbols:
1 is cyclone separator, and 2 be burner hearth, and 3 be coal bunker, and 4 be chilling slag cooler, and 5 be filtering and removing slag device, and 6 be heat exchange
Device, 7 be heat user, and 8 be bottom ash constituent analysis processing unit, and 9 be bottom ash storage warehouse, and 10 be drying unit, and 11 be sink, and 12 are
Feedwater piping, 13 be economizer feedwater piping, and 14 be condensation heat transfer device, and 15 be steam extraction pump, and 16 be filtering and removing slag device, and 17 are
Chimney, 18 be deduster, and 19 be economizer outlet conduit, and 20 be back-end surfaces, and 21 be economizer, and 22 exchange for fluid bed heat
Device.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
As shown in Figure 1, a kind of utilization system of CFB Slag quenching provided by the invention, main
It to be made of chilling system, bottom ash recovery and processing system, warm sludge water afterheat utilizing system and condensation heat transfer system.Specifically include rotation
Wind separator 1, burner hearth 2, coal bunker 3, chilling slag cooler 4, filtering and removing slag device 5, heat exchanger 6, bottom ash constituent analysis processing unit
8, bottom ash storage warehouse 9, drying unit 10, sink 11, condensation heat transfer device 14, steam extraction pump 15, filtering and removing slag device 16, chimney
17, deduster 18, economizer 21 and fluidized bed exchanger 22.
Wherein, coal bunker 3 is connected by transport pipeline with burner hearth raw coal entrance 2,2 slag outlet of burner hearth and chilling slag cooler 4
Clinker entrance is connected, and the outlet of the pulp water of chilling slag cooler 4 is connected with 5 entrance of filtering and removing slag device, filtering and removing slag device 5 export and
6 hot water inlet of heat exchanger is connected, and 6 cooling water outlet of heat exchanger is connected with 11 return water entrance of sink；The lime-ash of chilling slag cooler 4 exports
It is connected with 10 lime-ash entrance of drying unit, the outlet of 10 lime-ash of drying unit is connected with 9 import of bottom ash storage warehouse, 10 cigarette of drying unit
Gas outlet is connected with 14 smoke inlet of condensation heat transfer device, and 10 smoke inlet of drying unit is connected with economizer exhanst gas outlet, bottom
The outlet of slag storage warehouse 9 is connected with 8 import of bottom ash constituent analysis processing unit；The cold water inlet of chilling slag cooler 4 and sink 11 are cold
Water out be connected, the steam (vapor) outlet of chilling slag cooler 4 is connected with 16 entrance of filtering and removing slag device, filtering and removing slag device 16 export and
15 import of steam extraction pump is connected, and the outlet of steam extraction pump 15 is connected with 14 steam inlet of condensation heat transfer device, 14 flue gas of condensation heat transfer device
Outlet is connected with 18 smoke inlet of deduster, and the outlet of deduster 18 is connected with chimney 17.Cyclone separator smoke inlet 1 and burner hearth
2 high-temperature flue gas outlets are connected, and 1 exhanst gas outlet of cyclone separator is connected with 20 smoke inlet of back-end surfaces, fluid bed heat heat exchange
22 coal ash entrance of device is connected with 1 coal ash entrance of cyclone separator, the outlet of 22 coal ash of fluid bed heat heat exchanger and 2 coal ash entrance of burner hearth
It is connected.
When whole system work operation, coal enters burner hearth 2 by coal bunker 3 and carries out high-temp combustion, generates high temperature furnace slag.Clinker is fallen
Enter in chilling slag cooler 4, becomes chilling bottom ash.Chilling bottom ash comes drying unit 10 from chilling slag cooler 4 by pipeline.It is drying
In equipment for drying 10, chilling bottom ash is dried with flue gas.Bottom ash by drying is sent to bottom ash constituent analysis processing dress again
It sets in 8, component analysis then is carried out to bottom ash, the high lime-ash of wherein free CaO content is sent back to furnace as desulfurizing agent again
Thorax.Warm sludge water passes through pipeline transportation into filtering and removing slag device 5 from chilling slag cooler 4, and warm sludge water is conveyed after filtering and removing slag
Into heat exchanger 6, the warm sludge water after heat exchange comes back to sink 12.High-temperature steam in steam extraction pump 15 under effect, it is cold from chilling
Filtering and removing slag device 16 is transported in slag device 4.Then it is filtered in filtering and removing slag device 16 except Slag treatment, then is conveyed
To in condensing heat exchanger 14.In condensing heat exchanger 14, high-temperature steam and the flue gas to come from the conveying of drying unit 10, also
Heat exchange occurs with the water in feedwater piping 12.To deduster 19, flue gas passes through chimney 17 again and is arranged for flue gas emission after heat exchange
It is put into the external world.In condensing heat exchanger 14, the condensate of water supply and high-temperature steam by heat exchange passes through economizer feedwater piping
13 enter in economizer 21.
The chilling system, in chilling slag cooler 4, with 30 DEG C or so of cold water chilling high temperature furnace slag, slag temperature is about
850-900 DEG C, high temperature furnace slag is directly contacted with low-temperature cooling water, realizes lime-ash quenching.After chilling, warm sludge water is cold from chilling
It is discharged on the right side of slag device 4, is used for UTILIZATION OF VESIDUAL HEAT IN, high-temperature steam enters condensation heat transfer system.Chilling bottom ash is pulled out by slag collector, is entered
Bottom ash recovery and processing system.
The bottom ash recovery and processing system, chilling bottom ash is transported to drying unit 10 through dreg removing system, in drying unit
It is dried in 10 with flue gas adverse current contact, flue gas is from 20 back-end ductwork of economizer.Then it handles and fills in bottom ash constituent analysis
It sets 8 pairs of bottom ash progress component analyses and sends burner hearth 2 back to again using the high bottom ash of free CaO content as desulfurizing agent；Free CaO,
CaSO4The low bottom ash of content is used as cement spike；CaSO4The high bottom ash of content is used as cement adjustable solidification agent, realizes the function of chilling bottom ash
Energyization utilizes.
The warm sludge water afterheat utilizing system, warm sludge water in filtering and removing slag device 5 after filtration treatment, in heat exchanger 6
Sufficiently heat exchange.The heat of warm sludge water is used for heat user 7 by heat exchanger, such as is utilized as heating etc., and high temperature furnace slag is realized
UTILIZATION OF VESIDUAL HEAT IN.
The condensation heat transfer system composition, is extracted out in the high-temperature steam that chilling slag cooler 4 generates by steam extraction pump 15, warm steam
In filtering and removing slag device 16 after filtering and removing slag, into condensing heat exchanger 14, and dry the flue gas after wet slag be also transported to it is solidifying
Tie heat exchanger 14.High-temperature steam and flue gas are sufficiently exchanged heat with water supply, and the water after then exchanging heat is logical as " economizer water supply "
It crosses economizer feedwater piping 13 and is transported to economizer 21, the flue gas after heat exchange is after 18 dedusting of deduster, then passes through chimney 17
It is discharged into the external world.This process makes full use of afterheat of slags and fume afterheat, reduces thermal pollution, improves the heat of entire boiler system
Efficiency.
A kind of method of comprehensive utilization of CFB Slag quenching provided by the invention, comprising:
Coal by coal bunker 3 enter burner hearth 2 carry out high-temp combustion, generate high temperature furnace slag, about 850-900 DEG C of slag temperature.Then make
Clinker is fallen into chilling slag cooler 4 by slagging channel, and fierce heat exchange occurs in slag cooler 4 for clinker and water.It generates
Chilling bottom ash, is pulled out by slag collector, into dreg removing system.Then chilling bottom ash is entered in drying unit 10 by dreg removing system.
In drying unit 10, one flue gas is quoted from back-end surfaces 20, counter current contacting formula drying and processing is carried out to chilling bottom ash.
Bottom ash is introduced into bottom ash storage warehouse 9, then carries out component analysis to bottom ash in bottom ash treatment device 8.Free CaO content is high
Bottom ash sends again as desulfurizing agent and melts down thorax 2 and be recycled；Free CaO, CaSO4The low bottom ash of content is mixed as cement
Material, CaSO4The high bottom ash of content is used as cement adjustable solidification agent.Bottom ash is made full use of, is reduced environmental pollution, boiler bottom slag is improved and utilizes
Efficiency.The cold water of slag cooler is introduced from sink 11, and after heat exchange occurs with high temperature furnace slag, the warm sludge water of generation is on the left of slag cooler
Discharge, into filtering and removing slag device 5.Warm sludge water after filtering and removing slag enters heat exchanger 6, and the heat after exchange is used for heat user
Heating, and the warm sludge water after heat exchange comes back to sink 12.In slag cooler 11, heat exchange occurs for high temperature furnace slag and cold water
When, generated high-temperature steam is extracted out by steam extraction pump 15.High-temperature steam is first filtered in filtering and removing slag device 16 except Slag treatment.
In condensing heat exchanger 14, with water supply heat exchange occurs for high-temperature steam and the flue gas after drying.Then flue gas emission is to deduster
It is dusted in 18, then the external world is discharged by chimney 17.And the water supply Jing Guo heat exchange enters province's coal as " economizer water supply "
In device 21.Afterheat of slags is made full use of in the whole process, improves the thermal efficiency of entire boiler system.
The embodiment that the present invention is told, core concept is connect to high temperature furnace slag with water in chilling slag cooler 4
Touch quenching makes warm sludge heat exchange more thoroughly, more sufficiently, and obtains chilling bottom ash.Then flue gas drying bottom ash is used, and right
Chilling bottom ash carries out component analysis.The high bottom ash of free CaO content comes back to burner hearth as desulfurizing agent, and free CaO,
CaSO4The low bottom ash of content is used as cement spike, CaSO4The high bottom ash of content is used as cement adjustable solidification agent, improves the benefit of boiler slag
Use efficiency.Warm sludge water exchanges heat in heat exchanger, then heat heat supply.In condensing heat exchanger, high-temperature steam and
Flue gas carries out heat exchange with water supply, to improve economizer feed temperature, afterheat of slags is made full use of to improve entire boiler system
The thermal efficiency.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, ability
Other modifications or equivalent replacement that domain those of ordinary skill makes technical solution of the present invention, without departing from skill of the present invention
The spirit and scope of art scheme, are intended to be within the scope of the claims of the invention.
Claims (9)
1. a kind of utilization system of CFB Slag quenching, which is characterized in that including burner hearth (2), coal
Storehouse (3), chilling slag cooler (4), filtering and removing slag device (5), heat exchanger (6), bottom ash constituent analysis processing unit (8), bottom ash storage
Storage (9), drying unit (10), sink (11), condensation heat transfer device (14), filtering and removing slag device (16), chimney (17), dedusting
Device (18) and economizer (21)；Wherein,
Burner hearth (2) is equipped with raw coal entrance and slag outlet, burner hearth (2) slag outlet and chilling slag cooler (4) clinker entrance phase
Even, chilling slag cooler (4) pulp water outlet is connected with filtering and removing slag device (5) entrance, filtering and removing slag device (5) outlet and heat exchanger
(6) hot water inlet is connected, and heat exchanger (6) cooling water outlet is connected with sink (11) return water entrance；The lime-ash of chilling slag cooler (4) goes out
Mouth is connected with drying unit (10) lime-ash entrance, and the outlet of drying unit (10) lime-ash is connected with bottom ash storage warehouse (9) import, dries
Device (10) exhanst gas outlet is connected with condensation heat transfer device (14) smoke inlet, drying unit (10) smoke inlet and economizer
(21) exhanst gas outlet is connected, and bottom ash storage warehouse (9) outlet is connected with bottom ash constituent analysis processing unit (8) import；The cold slag of chilling
Device (4) cold water inlet is connected with sink (11) cooling water outlet, and chilling slag cooler (4) steam (vapor) outlet enters with filtering and removing slag device (16)
Mouth is connected, and filtering and removing slag device (16) outlet is connected with condensation heat transfer device (14) steam inlet, condensation heat transfer device (14) cigarette
Gas outlet is connected with deduster (18) smoke inlet, and deduster (18) outlet is connected with chimney (17).
2. a kind of utilization system of CFB Slag quenching according to claim 1, feature
It is, further includes coal bunker (3), is connected by transport pipeline with burner hearth (2) raw coal entrance.
3. a kind of utilization system of CFB Slag quenching according to claim 1, feature
Be, warm sludge water in filtering and removing slag device (5) after filtration treatment, heat exchanger (6) sufficiently exchange heat, and heat exchanger (6)
The heat of warm sludge water is used for heat user (7).
4. a kind of utilization system of CFB Slag quenching according to claim 1, feature
It is, is additionally provided with steam extraction pump on the pipeline that filtering and removing slag device (16) outlet is connect with condensation heat transfer device (14) steam inlet
(15)。
5. a kind of utilization system of CFB Slag quenching according to claim 1, feature
It is, further includes cyclone separator (1), back-end surfaces (20) and fluid bed heat heat exchanger (22), burner hearth (2) high-temperature flue gas goes out
Mouth is connected with cyclone separator (1) smoke inlet, cyclone separator (1) exhanst gas outlet and back-end surfaces (20) smoke inlet phase
Even, cyclone separator (1) coal ash entrance is connected with fluid bed heat heat exchanger (22) coal ash entrance, fluid bed heat heat exchanger (22) coal
Ash outlet is connected with burner hearth (2) coal ash entrance.
6. a kind of utilization system of CFB Slag quenching according to claim 5, feature
It is, economizer (21) setting is provided with feedwater piping (12), work in back-end surfaces (20) on condensation heat transfer device (14)
When making, in condensing heat exchanger (14), high-temperature steam and convey the flue gas that comes from drying unit (10), there are also and feedwater piping
(12) heat exchange occurs for the water in；To deduster (19), flue gas passes through chimney (17) again and is discharged into for flue gas emission after heat exchange
It is extraneous；In condensing heat exchanger (14), the condensate of water supply and high-temperature steam by heat exchange passes through economizer feedwater piping
(13) enter in economizer (21).
7. a kind of utilization system of CFB Slag quenching according to claim 1, feature
It is, in chilling slag cooler (4), using 30 DEG C of cold water chilling high temperature furnace slag, slag temperature is 850-900 DEG C, high temperature furnace
Slag is directly contacted with low-temperature cooling water, realization lime-ash quenching, and after chilling, warm sludge water is discharged from chilling slag cooler (4), is used for
UTILIZATION OF VESIDUAL HEAT IN, high-temperature steam enter condensation heat transfer system, and chilling bottom ash is pulled out by slag collector, into bottom ash recovery and processing system.
8. a kind of utilization system of CFB Slag quenching according to claim 7, feature
It is, chilling bottom ash is transported to drying unit (10) through dreg removing system, and flue gas adverse current contact is used in drying unit (10)
Drying, flue gas is from economizer (20) back-end ductwork；Then component is carried out to bottom ash in bottom ash constituent analysis processing unit (8)
Analysis, using the high bottom ash of free CaO content as desulfurizing agent, sends burner hearth (2) back to again；Free CaO, CaSO4The low bottom of content
Slag is used as cement spike；CaSO4The high bottom ash of content is used as cement adjustable solidification agent, realizes that the functionalization of chilling bottom ash utilizes.
9. a kind of method of comprehensive utilization of CFB Slag quenching, which is characterized in that this method is based on right
It is required that a kind of utilization system of CFB Slag quenching described in 1, comprising:
Coal enter burner hearth (2) carry out high-temp combustion, generate high temperature furnace slag, fall into clinker chilling slag cooler (4), clinker with
Fierce heat exchange occurs in chilling slag cooler (4) for water；The chilling bottom ash of generation, is pulled out by slag collector, into dreg removing system；
Enter drying unit (10) after chilling bottom ash elder generation filtration treatment to carry out chilling bottom ash with flue gas inverse in drying unit (10)
Flow contact drying；Component analysis is carried out to bottom ash in bottom ash constituent analysis processing unit (8), wherein free CaO content is high
Bottom ash sends again as desulfurizing agent and melts down thorax (2) and be recycled, free CaO, CaSO4The low bottom ash of content is used as cement
Spike, CaSO4The high bottom ash of content is used as cement adjustable solidification agent；Warm sludge water is after filtering and removing slag, in heat exchanger (6), after exchange
Heat for heat user heat, and by heat exchange after warm sludge water come back to sink (11)；High-temperature steam elder generation filters out excessively
Slag device (16) is filtered except Slag treatment；In condensing heat exchanger (14), high-temperature steam and the flue gas after drying are sent out with water supply
Heat exchange；Then flue gas emission is dusted in deduster (18), then is discharged into the external world by chimney (17), by heat exchange
Water supply as " economizer water supply " enter economizer (21) in.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958960A (en) * | 2021-10-28 | 2022-01-21 | 中原环保股份有限公司 | Municipal sludge treatment system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080057886A (en) * | 2006-12-21 | 2008-06-25 | 현대중공업 주식회사 | Method and device for cooling of bottom ash in circulating fluidized bed combustion boiler |
| CN104651555A (en) * | 2013-11-25 | 2015-05-27 | 丁兆顺 | Blast furnace slag flushing water waste heat generating apparatus |
| CN109282280A (en) * | 2018-09-29 | 2019-01-29 | 中国能源建设集团广东省电力设计研究院有限公司 | CFB Boiler water combined recovery heat of slags system and its control method |
| CN208545449U (en) * | 2018-06-27 | 2019-02-26 | 西安华江环保科技股份有限公司 | A kind of pressure type blast furnace red dregs waste heat recycling system |
-
2019
- 2019-03-29 CN CN201910250749.4A patent/CN109990271A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080057886A (en) * | 2006-12-21 | 2008-06-25 | 현대중공업 주식회사 | Method and device for cooling of bottom ash in circulating fluidized bed combustion boiler |
| CN104651555A (en) * | 2013-11-25 | 2015-05-27 | 丁兆顺 | Blast furnace slag flushing water waste heat generating apparatus |
| CN208545449U (en) * | 2018-06-27 | 2019-02-26 | 西安华江环保科技股份有限公司 | A kind of pressure type blast furnace red dregs waste heat recycling system |
| CN109282280A (en) * | 2018-09-29 | 2019-01-29 | 中国能源建设集团广东省电力设计研究院有限公司 | CFB Boiler water combined recovery heat of slags system and its control method |
Non-Patent Citations (1)
| Title |
|---|
| 赵计辉等: "矸石电厂循环流化床灰渣特性分析及其资源化利用途径", 《中国矿业》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958960A (en) * | 2021-10-28 | 2022-01-21 | 中原环保股份有限公司 | Municipal sludge treatment system |
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Application publication date: 20190709 |