CN108592634A - A kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and method - Google Patents

A kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and method Download PDF

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Publication number
CN108592634A
CN108592634A CN201810313378.5A CN201810313378A CN108592634A CN 108592634 A CN108592634 A CN 108592634A CN 201810313378 A CN201810313378 A CN 201810313378A CN 108592634 A CN108592634 A CN 108592634A
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China
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solid sulfur
sulfur ash
cyclone furnace
air
flue gas
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CN201810313378.5A
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Inventor
王群英
宋明光
罗蒙蒙
陈仕国
曲金星
张伟
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Huadian Electric Power Research Institute Co Ltd
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Huadian Electric Power Research Institute Co Ltd
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Priority to CN201810313378.5A priority Critical patent/CN108592634A/en
Publication of CN108592634A publication Critical patent/CN108592634A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/04—Arrangements of recuperators
    • F23L15/045—Arrangements of recuperators using intermediate heat-transfer fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/165—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being a fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F27D2017/006—Systems for reclaiming waste heat using a boiler
    • 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
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The present invention relates to a kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and methods.Currently, how to reduce the cured cost of disposal of solid sulfur ash high-temperature fusion is that technology application is suffered from a problem that.Solid sulfur ash is carried out high-temperature fusion by the present invention using coal-fired cyclone stove, and glassy state slag is formed after water quenching, and the volume of solid sulfur ash is largely eliminated, while also heavy metal can be wrapped in slag, realizes heavy metal and the stable curing of free calcium.The high-temperature flue gas of cyclone furnace discharge enters waste heat boiler and carries out cogeneration, contains high concentration SO2Flue gas through wet method carry out SO2Recycling prepares ammonia fertilizer.The present invention is effectively utilized the non-charcoal in solid sulfur ash using the abundant feature of cyclone furnace flameholding, it energy is provided reduces cost for the melting and solidification of solid sulfur ash, while realizing solid sulfur ash minimizing, innoxious, recycling, waste heat boiler and flue gas SO2Recycling can further create economic benefit again, have preferable economy.

Description

A kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and method
Technical field
The present invention relates to a kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and methods, belong to solid sulphur The technical field of ash comprehensive utilization.
Background technology
Solid sulfur ash and clinker be in ordinary cycle fluid bed furnace or Pressured Circulating Fluidized Bed stove production technology sulfur-bearing coal with Sulphur-fixing agent（Generally agstone）It is solid through 875 DEG C ~ 950 DEG C burnings in circulating fluidized bed boiler after being mixed with certain proportion Generated solid waste after sulphur.Because belonging to medium temperature burning, a large amount of desulfurizing agent is added in combustion process, causes to obtain The more common coal-powder boiler flyash of solid sulfur ash have prodigious difference, such as CaO, SO3Content is high, and loss on ignition is big, and ingredient fluctuates Larger, this has a significant impact for the stability of building material product, durability, therefore solid sulfur ash produces building materials in the whole country at present The application of product industrialization is seldom, and China's fluidized bed combustion coal ash/slag is at present mainly based on stacking at this stage.The stacking of solid sulfur ash is not only wanted A large amount of soil is occupied, land resource growing tension, dust raising phenomenon is caused air environment to be caused to pollute, and heavy metal and strong Alkalinity can cause water body and soil pollution again, therefore, solid sulfur ash be effectively treated and to comprehensively utilize work extremely urgent.
High-temperature fusion curing technology be it is a kind of be widely used in dispose incinerator ash technology, melting process higher than Carried out under 1400 DEG C of hot conditions, pyroprocess can fix heavy metal and actinides in flying dust, such as application No. is 201710467419.1 Chinese patent, the slag that can also significantly reduce the volume of flying dust, while obtain but also as Building, roadbed material etc., therefore can realize minimizing, recycling, the innoxious application of flying dust.But since high-temperature fusion needs disappear Consumption fuel or electric power, high energy consumption limit the application of the technology, how to reduce the cured cost of disposal of solid sulfur ash high-temperature fusion It is technology application to suffer from a problem that.
Invention content
It is an object of the invention to overcome above-mentioned deficiency existing in the prior art, and provide a kind of reasonable in design Solid sulfur ash cyclone furnace melts and fume afterheat generating integrated system and method, on the one hand utilize in solid sulfur ash unburned carbon content compared with High feature provides a part of fuel for high-temperature fusion, and still further aspect is to the heat of high-temperature flue gas and the Sulphur ressource of high-content It is recycled, disposes and apply solid sulfur ash to seek a kind of new mode, solve environment caused by solid sulfur ash stockpiling Problem simultaneously creates certain economic benefit.
Technical solution is used by the present invention solves the above problems：A kind of melting of solid sulfur ash cyclone furnace and fume afterheat hair Electrical integrated system, which is characterized in that including No.1 pressure fan, solid sulfur ash dispenser, coal dust dispenser, primary air nozzle, secondary Air port, cyclone furnace, slag-drip opening, chilling apparatus, waste heat boiler, denitrification apparatus, No. two pressure fan, air preheater, electrostatic precipitations Device, NH3Spray column, air-introduced machine and chimney；The primary air nozzle is arranged in the lower part of cyclone furnace, the coal dust dispenser and one Secondary air port connection；The overfiren air port is arranged on the top of cyclone furnace, and the solid sulfur ash dispenser is connected to overfiren air port, described No.1 pressure fan is connect with solid sulfur ash dispenser；The slag-drip opening is arranged in the bottom of cyclone furnace, the chilling apparatus and deslagging Mouth connection；The cyclone furnace is connected to waste heat boiler, the waste heat boiler, denitrification apparatus, air preheater, electrostatic precipitator, NH3Spray column, air-introduced machine and chimney are sequentially communicated, and the air preheater also connects with coal dust dispenser and No. two pressure fan respectively It is logical.It is reasonable in design, it can be achieved that collection solid sulfur ash coal-fired cyclone melting, smoke and waste steam boiler power generation, flue gas SO2Recycling ammonia processed Fertile, denitrating flue gas dedusting integral process reaches effective place of solid sulfur ash while ensureing not cause damages to environment It sets.
Furthermore, the waste heat boiler is dual pressure and reheat formula waste heat boiler, and the waste heat boiler is along flow of flue gas side To successively including superheater, reheater, evaporator and economizer.
Furthermore, the waste heat boiler further includes high-pressure turbine, low-pressure turbine, condenser and circulating pump Deng.
Waste heat boiler can effectively utilize the heat in flue gas, carry out cogeneration by using high-temperature flue gas, reduce The cost of disposal of solid sulfur ash.
A kind of melting of solid sulfur ash cyclone furnace and the generating integrated method of fume afterheat, which is characterized in that the solid sulfur ash rotation Wind furnace melts and the generating integrated method of fume afterheat is melted using solid sulfur ash cyclone furnace as described above and fume afterheat generates electricity Integral system；The step of solid sulfur ash cyclone furnace melting and fume afterheat generating integrated method, is as follows：
（1）First air needed for coal dust firing is sent by No. two pressure fan in air preheater, and after air preheater preheats It mixes with coal dust into coal dust dispenser, is sprayed into cyclone furnace from primary air nozzle jointly with coal dust later；Needed for coal dust firing Secondary Air made a gift to someone in solid sulfur ash dispenser by No.1 pressure fan, and carry solid sulfur ash and enter whirlwind from the overfiren air port on top In stove；Solid sulfur ash in cyclone furnace after high-temperature heating is rapidly reached melting temperature, while Secondary Air high speed in cyclone furnace Rotation, solid sulfur ash throw to the wall surface of cyclone furnace under the action of the centrifugal force, and high-temperature wall surface makes solid sulfur ash discharge rapidly out SO2Then Melting, the solid sulfur ash of melting is discharged to from the slag-drip opening of whirlwind furnace bottom in chilling apparatus in the form of liquid slag carries out water quenching. The flameholding of cyclone furnace can fully efficiently use the heat of non-charcoal in solid sulfur ash.
（2）The high-temperature flue gas being discharged from cyclone furnace, which enters in waste heat boiler, releases heat, temperature reduction, the heat released It is utilized by waste heat boiler.Solid sulfur ash melting needs the high temperature at 1400 DEG C or more, the flue gas that cyclone furnace is discharged to contain a large amount of remaining Heat, using waste heat boiler to effectively utilize the heat in flue gas.
（3）The flue gas being discharged from waste heat boiler enters denitrification apparatus and carries out denitration process, and the NOx in flue gas is enable to reach Discharge standard.
（4）The flue gas being discharged from denitrification apparatus enters air preheater and is preheated to air, the sky in air preheater Gas is sent by No. two pressure fan, it is preheated after air enter in coal dust dispenser, mixed with coal dust and rotation entered by primary air nozzle Wind furnace.Air is preheated using fume afterheat, energy is adequately utilized, reduces energy loss.
（5）The flue gas being discharged from air preheater enters electrostatic precipitator, to remove the dust particles in flue gas.
（6）The flue gas being discharged from electrostatic precipitator enters NH3Spray column is to the SO in flue gas2It is absorbed, then prepares ammonia Fertilizer.SO in solid sulfur ash3Mostly 10% or more, mostly it is present in solid sulfur ash in the form of anhydrite, the hot conditions of cyclone furnace make SO3Can almost all be discharged into flue gas, NH3Spray column can recycle the S resources of this part, generate considerable economic benefit.
（7）From NH3The flue gas of spray column discharge passes through smoke stack emission to air through air-introduced machine.
Solid sulfur ash is carried out by high-temperature fusion using coal-fired cyclone stove, forms glassy state slag, the body of solid sulfur ash after water quenching Product is largely eliminated while also heavy metal can be wrapped in slag, realizes heavy metal and the stable curing of free calcium；Whirlwind The high-temperature flue gas that fire grate removes enters waste heat boiler and carries out cogeneration, contains high concentration SO2Flue gas through wet method carry out SO2It returns Receipts prepare ammonia fertilizer.It is the molten of solid sulfur ash to be effectively utilized the non-charcoal in solid sulfur ash using the abundant feature of cyclone furnace flameholding Melting solidification and providing energy reduces cost, while realizing solid sulfur ash minimizing, innoxious, recycling, waste heat boiler And flue gas SO2Recycling can further create economic benefit again, have preferable economy.
Furthermore, SO in the solid sulfur ash3Content is 10% or more, and unburned carbon content is 5 ~ 10%.This part resource It can be recycled, improve the utilization rate of resource.
Furthermore, the temperature of the cyclone furnace is at 1400 DEG C or more.The flue gas of cyclone furnace discharge contains a large amount of remaining Heat, this part of waste heat can be used effectively.
Furthermore, the exhaust gas temperature of the waste heat boiler is at 300 DEG C ~ 350 DEG C.
Furthermore, the air themperature after air preheater preheats is 200 DEG C.
Compared with prior art, the present invention haing the following advantages and effect：The coal-fired cyclone melting of present invention collection solid sulfur ash, Smoke and waste steam boiler power generation, flue gas SO2The techniques such as recycling ammonia fertilizer processed, denitrating flue gas dedusting are integrated, and are effectively utilized solid sulfur ash In non-charcoal, energy be provided reduce cost of disposal for the melting and solidification of solid sulfur ash, more than whirlwind melting and flue gas The combination of heat boiler and fume treatment facility carries out cogeneration by using high-temperature flue gas, and to highly concentrated in flue gas The SO of degree2It is recycled, further reduced the cost of disposal of solid sulfur ash.Glassy state slag after melting can be by recycling It utilizes, with more the efficiency of cycling economy turned waste into wealth while reducing the land wastage caused by accumulation.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
In figure：1, No.1 pressure fan；2, solid sulfur ash dispenser；3, coal dust dispenser；4, primary air nozzle；5, overfiren air port； 6, cyclone furnace；7, slag-drip opening；8, chilling apparatus；9, waste heat boiler；10, denitrification apparatus；11, No. two pressure fan；12, air preheat Device；13, electrostatic precipitator；14、NH3Spray column；15, air-introduced machine；16, chimney.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is to this hair Bright explanation and the invention is not limited in following embodiments.
Embodiment.
Referring to Fig. 1, a kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system, including No.1 pressure fan 1, Solid sulfur ash dispenser 2, coal dust dispenser 3, primary air nozzle 4, overfiren air port 5, cyclone furnace 6, slag-drip opening 7, chilling apparatus 8, waste heat Boiler 9, denitrification apparatus 10, No. two pressure fan 11, air preheater 12, electrostatic precipitator 13, NH3Spray column 14, air-introduced machine 15 With chimney 16；Primary air nozzle 4 is arranged in the lower part of cyclone furnace 6, and coal dust dispenser 3 is connected to primary air nozzle 4；Overfiren air port 5 is set It sets on the top of cyclone furnace 6, solid sulfur ash dispenser 2 is connected to overfiren air port 5, and No.1 pressure fan 1 connects with solid sulfur ash dispenser 2 It connects；Slag-drip opening 7 is arranged in the bottom of cyclone furnace 6, and chilling apparatus 8 is connected to slag-drip opening 7；Cyclone furnace 6 is connected to waste heat boiler 9, Waste heat boiler 9, denitrification apparatus 10, air preheater 12, electrostatic precipitator 13, NH3Spray column 14, air-introduced machine 15 and chimney 16 It is sequentially communicated, air preheater 12 is also connected to coal dust dispenser 3 and No. two pressure fan 11 respectively.
Waste heat boiler 9 is dual pressure and reheat formula waste heat boiler, which includes overheat successively along flow of flue gas direction Device, reheater, evaporator and economizer, while further including high-pressure turbine, low-pressure turbine, condenser and circulating pump etc..
A kind of melting of solid sulfur ash cyclone furnace and the generating integrated method of fume afterheat, use solid sulfur ash whirlwind as described above Stove melts and fume afterheat generating integrated system；Its workflow is as follows：
First air needed for coal dust firing is sent by No. two pressure fan 11 in air preheater 12, and is preheated through air preheater 12 Enter in coal dust dispenser 3 afterwards and mixed with coal dust, is sprayed into cyclone furnace 6 from primary air nozzle 4 jointly with coal dust later；Coal dust firing Required Secondary Air is made a gift to someone by No.1 pressure fan 1 in solid sulfur ash dispenser 2, and carries overfiren air port 5 of the solid sulfur ash from top Into in cyclone furnace 6, SO in solid sulfur ash3Content is 10% or more, and unburned carbon content is 5 ~ 10%；The temperature of cyclone furnace 6 is 1400 DEG C or more, the solid sulfur ash in cyclone furnace 6 after high-temperature heating is rapidly reached melting temperature, while Secondary Air is in cyclone furnace 6 High speed rotation, solid sulfur ash throw to the wall surface of cyclone furnace 6 under the action of the centrifugal force, and high-temperature wall surface makes solid sulfur ash discharge rapidly out SO2Then it melts, the solid sulfur ash of melting is discharged to from the slag-drip opening 7 of 6 bottom of cyclone furnace in chilling apparatus 8 in the form of liquid slag Carry out water quenching.
The high-temperature flue gas being discharged from cyclone furnace 6, which enters in waste heat boiler 9, releases heat, temperature reduction, the heat released It is utilized by waste heat boiler 9, waste heat boiler 9 uses dual pressure and reheat form, includes superheater, reheating successively by flow of flue gas direction Device, evaporator, economizer, while further including the component parts such as high-pressure turbine, low-pressure turbine, condenser and circulating pump； The exhaust gas temperature of waste heat boiler 9 is at 300 DEG C ~ 350 DEG C.
The flue gas being discharged from waste heat boiler 9 enters denitrification apparatus 10 and carries out denitration process, and the NOx in flue gas is enable to reach Discharge standard.The flue gas being discharged from denitrification apparatus 10 enters air preheater 12 and is preheated to air, in air preheater 12 Air be sent by No. two pressure fan 11, through air preheater 12 preheating after air themperature be 200 DEG C, later, after preheated Air enter in coal dust dispenser 3, mixed with coal dust by primary air nozzle 4 enter cyclone furnace 6.It is discharged from air preheater 12 Flue gas enters electrostatic precipitator 13, to remove the dust particles in flue gas.Then, the flue gas being discharged from electrostatic precipitator 13 enters NH3Spray column 14 is to the SO in flue gas2It is absorbed and prepares ammonia fertilizer.From NH3The flue gas that spray column 14 is discharged is logical through air-introduced machine 15 It crosses chimney 16 and is discharged into air.
Although the present invention is disclosed as above with embodiment, it is not limited to protection scope of the present invention, any to be familiar with The technical staff of this technology changes and retouches made by without departing from the spirit and scope of the invention, should all belong to this hair Bright protection domain.

Claims (8)

1. a kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system, which is characterized in that including No.1 pressure fan, Solid sulfur ash dispenser, primary air nozzle, overfiren air port, cyclone furnace, slag-drip opening, chilling apparatus, waste heat boiler, takes off coal dust dispenser Nitre device, No. two pressure fan, air preheater, electrostatic precipitator, NH3Spray column, air-introduced machine and chimney；The primary air nozzle It is arranged in the lower part of cyclone furnace, the coal dust dispenser is connected to primary air nozzle；The overfiren air port is arranged in the upper of cyclone furnace Portion, the solid sulfur ash dispenser are connected to overfiren air port, and the No.1 pressure fan is connect with solid sulfur ash dispenser；The slag-drip opening It is arranged in the bottom of cyclone furnace, the chilling apparatus is connected to slag-drip opening；The cyclone furnace is connected to waste heat boiler, the waste heat Boiler, denitrification apparatus, air preheater, electrostatic precipitator, NH3Spray column, air-introduced machine and chimney are sequentially communicated, the air Preheater is also connected to coal dust dispenser and No. two pressure fan respectively.
2. solid sulfur ash cyclone furnace melting according to claim 1 and fume afterheat generating integrated system, which is characterized in that The waste heat boiler is dual pressure and reheat formula waste heat boiler, which includes superheater, again successively along flow of flue gas direction Hot device, evaporator and economizer.
3. solid sulfur ash cyclone furnace melting according to claim 2 and fume afterheat generating integrated system, which is characterized in that The waste heat boiler further includes high-pressure turbine, low-pressure turbine, condenser and circulating pump.
4. a kind of solid sulfur ash cyclone furnace melting and the generating integrated method of fume afterheat, which is characterized in that the solid sulfur ash whirlwind Stove melts and the generating integrated method of fume afterheat is revolved using solid sulfur ash as claimed in any one of claims 1-3 Wind furnace melts and fume afterheat generating integrated system；The solid sulfur ash cyclone furnace melting and the generating integrated method of fume afterheat The step of it is as follows：
（1）First air needed for coal dust firing is sent by No. two pressure fan in air preheater, and after air preheater preheats It mixes with coal dust into coal dust dispenser, is sprayed into cyclone furnace from primary air nozzle jointly with coal dust later；Needed for coal dust firing Secondary Air made a gift to someone in solid sulfur ash dispenser by No.1 pressure fan, and carry solid sulfur ash and enter whirlwind from the overfiren air port on top In stove；Solid sulfur ash in cyclone furnace after high-temperature heating is rapidly reached melting temperature, while Secondary Air high speed in cyclone furnace Rotation, solid sulfur ash throw to the wall surface of cyclone furnace under the action of the centrifugal force, and high-temperature wall surface makes solid sulfur ash discharge rapidly out SO2Then Melting, the solid sulfur ash of melting is discharged to from the slag-drip opening of whirlwind furnace bottom in chilling apparatus 8 in the form of liquid slag carries out water quenching；
（2）The high-temperature flue gas being discharged from cyclone furnace, which enters in waste heat boiler, releases heat, temperature reduction, and the heat released is remaining Heat boiler utilizes；
（3）The flue gas being discharged from waste heat boiler enters denitrification apparatus and carries out denitration process, and the NOx in flue gas is enable to reach discharge Standard；
（4）The flue gas being discharged from denitrification apparatus enters air preheater and is preheated to air, the air in air preheater by No. two pressure fan are sent into, it is preheated after air enter in coal dust dispenser, mixed with coal dust and cyclone furnace entered by primary air nozzle；
（5）The flue gas being discharged from air preheater enters electrostatic precipitator, to remove the dust particles in flue gas；
（6）The flue gas being discharged from electrostatic precipitator enters NH3 spray columns to the SO in flue gas2It is absorbed, then prepares ammonia fertilizer；
（7）From NH3The flue gas of spray column discharge passes through smoke stack emission to air through air-introduced machine.
5. solid sulfur ash cyclone furnace melting according to claim 4 and the generating integrated method of fume afterheat, which is characterized in that SO in the solid sulfur ash3Content is 10% or more, and unburned carbon content is 5 ~ 10%.
6. solid sulfur ash cyclone furnace melting according to claim 4 and the generating integrated method of fume afterheat, which is characterized in that The temperature of the cyclone furnace is at 1400 DEG C or more.
7. solid sulfur ash cyclone furnace melting according to claim 4 and the generating integrated method of fume afterheat, which is characterized in that The exhaust gas temperature of the waste heat boiler is at 300 DEG C ~ 350 DEG C.
8. solid sulfur ash cyclone furnace melting according to claim 4 and the generating integrated method of fume afterheat, which is characterized in that Air themperature after air preheater preheats is 200 DEG C.
CN201810313378.5A 2018-04-10 2018-04-10 A kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and method Pending CN108592634A (en)

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Application publication date: 20180928