EP1736527A1 - Method and device for feeding inflammables to gasifying furnace, and gasification melting system - Google Patents

Method and device for feeding inflammables to gasifying furnace, and gasification melting system Download PDF

Info

Publication number
EP1736527A1
EP1736527A1 EP03706956A EP03706956A EP1736527A1 EP 1736527 A1 EP1736527 A1 EP 1736527A1 EP 03706956 A EP03706956 A EP 03706956A EP 03706956 A EP03706956 A EP 03706956A EP 1736527 A1 EP1736527 A1 EP 1736527A1
Authority
EP
European Patent Office
Prior art keywords
combustibles
supplying
combustible
gasification furnace
hopper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03706956A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1736527A4 (en
Inventor
Ryuichi c/o Ebara Corporation ISHIKAWA
Chikao c/o Ebara Corporation GOKE
Ken c/o Ebara Corporation KOMIYAMA
Yuichi c/o Ebara Corporation NAKAMURA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Original Assignee
Ebara Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebara Corp filed Critical Ebara Corp
Publication of EP1736527A4 publication Critical patent/EP1736527A4/en
Publication of EP1736527A1 publication Critical patent/EP1736527A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/50—Fuel charging devices
    • C10J3/503—Fuel charging devices for gasifiers with stationary fluidised bed
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/723—Controlling or regulating the gasification process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/006—General arrangement of incineration plant, e.g. flow sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/442—Waste feed arrangements
    • F23G5/444—Waste feed arrangements for solid waste
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2200/00—Details of gasification apparatus
    • C10J2200/15—Details of feeding means
    • C10J2200/154—Pushing devices, e.g. pistons
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2200/00—Details of gasification apparatus
    • C10J2200/15—Details of feeding means
    • C10J2200/156—Sluices, e.g. mechanical sluices for preventing escape of gas through the feed inlet
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2200/00—Details of gasification apparatus
    • C10J2200/15—Details of feeding means
    • C10J2200/158—Screws
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
    • C10J2300/1628—Ash post-treatment
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
    • C10J2300/1637—Char combustion
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1693—Integration of gasification processes with another plant or parts within the plant with storage facilities for intermediate, feed and/or product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/30—Pyrolysing
    • F23G2201/303—Burning pyrogases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/40—Gasification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/20—Combustion to temperatures melting waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/30—Combustion in a pressurised chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/10—Waste feed arrangements using ram or pusher
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/12—Waste feed arrangements using conveyors
    • F23G2205/121—Screw conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/14—Waste feed arrangements using hopper or bin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/16—Waste feed arrangements using chute
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/18—Waste feed arrangements using airlock systems

Definitions

  • the present invention relates to a method and apparatus for supplying combustibles, such as municipal wastes, industrial wastes, biomass wastes, medical wastes, or automobile wastes including tire wastes, shredder dust, and the like, to a gasification furnace which gasifies the combustibles into a combustible gas, and to a gasification and slagging combustion system.
  • combustibles such as municipal wastes, industrial wastes, biomass wastes, medical wastes, or automobile wastes including tire wastes, shredder dust, and the like
  • FIG 1 is a diagram showing a schematic arrangement example of a fluidized-bed gasification furnace and a combustible supplying apparatus for supplying combustibles into the fluidized-bed gasification furnace which are used in this type of gasification and slagging combustion facility.
  • the fluidized-bed gasification furnace 10 holds a fluidized medium at a lower portion thereof, and a fluidized bed 11 of the fluidized medium is formed by supplying a fluidizing gas 12 from a lower portion of the furnace.
  • Combustibles 14 introduced through a combustible introduction port 13 are gasified by partial combustion under a reducing atmosphere in the fluidized bed 11.
  • This type of fluidized-bed gasification furnace 10 is generally operated so that the pressure in the furnace is a negative pressure of about -50 mm Aq. Accordingly, a large amount of external air which has not been preheated leaks through the combustible introduction port 13 into the furnace. The leaked air which has not been preheated is consumed by combustion at the freeboard 15 in the fluidized-bed gasification furnace 10. The combustible gas combusted in part by the leaked air is introduced through the combustible gas outlet port 16 into the slagging combustion furnace. Combustion air to be supplied to the slagging combustion furnace is generally preheated so as to increase the temperature of the slagging combustion furnace.
  • dampers having a sealing function are doubly provided in a chute connected to the combustible introduction port 13 (which corresponds to a portion between a combustible supplying means 30 and a combustible supplying means 33 connected to an upper stage of the combustible supplying means 30 in FIG 1) and combustibles 14 introduced into a hopper 38 by a crane 21 are supplied through the double damper 19 into the combustible supplying means 30 by a screw 34 while external air is prevented from entering the fluidized-bed gasification furnace 10 through the combustible introduction port 13 by sealing effects of the double damper 19.
  • double damper dampers having a sealing function
  • the hopper 38 is intermittently supplied with combustibles 14, the amount of combustibles 14 stored in the hopper 38 has large variations. Furthermore, combustibles 14 themselves have variations in quality. Therefore, fixed quantity supply cannot necessarily be achieved by the screw 34.
  • the present invention has been made in view of the above drawbacks, and it is, therefore, an object of the present invention to provide a method and apparatus for supplying combustibles to a gasification furnace and to a gasification and slagging combustion system which can prevent leakage of external air into the gasification furnace, reduce a variation of a produced gas, and facilitate operational control for stable gasification.
  • a method of supplying combustibles to a gasification furnace for gasifying the combustibles is characterized by comprising supplying the combustibles to a hopper while preventing external air from leaking into the gasification furnace by the combustibles themselves, and supplying the combustibles in the hopper to the gasification furnace in fixed quantity while controlling an amount of combustibles stored in the hopper so as to be constant.
  • combustibles are supplied to a hopper while external air is prevented from leaking into the gasification furnace together with the combustibles by the combustibles.
  • the combustibles in the hopper are supplied to the gasification furnace in fixed quantity while an amount of combustibles stored in the hopper is controlled so as to be constant. Accordingly, it is possible to reduce a variation of a combustible gas produced in the gasification furnace and facilitate stable operation of the gasification furnace. Further, since a variation of a combustible gas produced is thus reduced, it is also possible to facilitate stable operation of a slagging combustion furnace subsequent to the gasification furnace.
  • a method characterized in that a combustible gas which leaks from the gasification furnace to a combustible supplying side is released to a waste pit.
  • a combustible gas which leaks from the gasification furnace to a combustible supplying side can be treated safely by releasing the combustible gas to a waste pit because air is continuously drawn from the waste pit for deodorization and used for combustion.
  • a combustible supplying apparatus for supplying combustibles to a gasification furnace for gasifying the combustibles
  • the combustible supplying apparatus is characterized by comprising a first combustible supplying mechanism for supplying the combustibles while preventing external air from leaking into the gasification furnace, a hopper for storing the combustibles supplied through the first combustible supplying mechanism, and a second combustible supplying mechanism for supplying the combustibles in the hopper to the gasification furnace in fixed quantity while controlling an amount of combustibles stored in the hopper so as to be constant.
  • combustibles are supplied to a hopper by the first combustible supplying mechanism while external air is prevented from leaking into the gasification furnace.
  • external air can be prevented from leaking into the gasification furnace, and it is not necessary to provide any special sealing mechanisms such as a double damper.
  • the combustibles in the hopper are supplied to the gasification furnace in fixed quantity by the second combustible supplying mechanism while an amount of combustibles stored in the hopper is controlled so as to be constant. Accordingly, it is possible to reduce a variation of a combustible gas produced in the gasification furnace and facilitate stable operation of the gasification furnace. Further, since a variation of a combustible gas produced is thus reduced, it is also possible to facilitate stable operation of a slagging combustion furnace subsequent to the gasification furnace.
  • a combustible supplying apparatus characterized by comprising a relief valve for releasing a combustible gas which leaks from the gasification furnace to a second combustible supplying mechanism side, and supplying means for supplying the combustible gas released through the relief valve to a waste pit.
  • a gasification and slagging combustion system having a gasification furnace for gasifying combustibles and a slagging combustion furnace for melting a product produced in the gasification furnace
  • the gasification and slagging combustion system is characterized by comprising a first combustible supplying mechanism for supplying the combustibles while preventing external air from leaking into the gasification furnace together with the combustibles, a hopper for storing the combustibles supplied through the first combustible supplying mechanism, and a second combustible supplying mechanism for supplying the combustibles in the hopper to the gasification furnace in fixed quantity while controlling an amount of combustibles stored in the hopper so as to be constant.
  • a gasification and slagging combustion system characterized by comprising a relief valve for releasing a combustible gas which leaks from the gasification furnace to a second combustible supplying mechanism side, and supplying means for supplying the combustible gas released through the relief valve to a waste pit.
  • FIG 2 is a diagram showing a schematic arrangement of a fluidized-bed gasification furnace and a combustible supplying apparatus for supplying combustibles into the fluidized-bed gasification furnace according to the present invention.
  • a combustible supplying means 30 having a screw conveyor 31 operated by a motor 32 is connected to a combustible introduction port 13.
  • a combustible supplying means 33 having a screw conveyor 34 operated by a motor 35 is connected to the combustible supplying means 30.
  • a hopper 36 is provided so as to be connected to the combustible supplying means 33.
  • a chute 37 is provided so as to be connected to the hopper 36.
  • a hopper 38 is provided so as to be connected to the chute 37.
  • a pusher 39 is provided at a junction between the chute 37 and the hopper 38.
  • Combustibles 14 such as municipal wastes, industrial wastes, biomass wastes, medical wastes, or automobile wastes including tire wastes, shredder dust, and the like, are introduced into the hopper 38 by a crane 21 or the like. Material sealing is effectively performed by consolidated combustibles 14, which have been pushed at a lower feeding portion of the hopper by the pusher 39. Combustibles 14 are fed each time in a predetermined amount by the pusher 39 and received by the hopper 36. A level sensor 18 is provided in the hopper 36. The pusher 39 is operated so that the amount of combustibles held in the hopper 36 is maintained to be substantially constant. Material sealing effects provided by the consolidated combustibles 14 at the lower portion of the hopper 38 can prevent leakage of external air. Sealing effects provided by the combustibles 14 piled in the hopper 36 can also prevent entry of external air.
  • a pusher 40 is provided at a lower portion of the hopper 36.
  • a pusher portion 403 is pushed into the hopper 36 by a driving portion 401 of the pusher 40 to press the combustibles 14 against the screw 34.
  • a scraping device 41 is provided at a tip portion of the screw 34. The combustibles 14 pushed by the screw 34 are mechanically scraped to smoothen supply of the combustibles 14 to the screw conveyor 31.
  • the combustibles 14 supplied from the combustible supplying means 33 to the combustible supplying means 30 at a constant rate are supplied by the screw conveyor 31 through the combustible introduction port 13 into the fluidized-bed gasification furnace 10.
  • the combustibles 14 can be supplied at a constant rate, it is possible to remarkably facilitate stable operation of the fluidized-bed gasification furnace 10 with control of the amount of fluidizing gas 12 to be supplied and control of temperature in the furnace.
  • a relief valve 42 is provided in the combustible supplying means 33.
  • a combustible gas leaking from the fluidized-bed gasification furnace 10 can be released through the relief valve 42 and introduced to a waste pit by a supplying means having pipes, which is not shown. Since air is continuously drawn from the waste pit for deodorization and used for combustion, the combustible gas can be treated safely.
  • a cutoff damper which is not shown, is provided on a chute 43, which interconnects the combustible supplying means 33 and the combustible supplying means 30. The cutoff damper is closed at the beginning of operation or at the time of emergency.
  • a combustible gas 17 in the fluidized-bed gasification furnace 10 is prevented from being released through the combustible supplying apparatus to an atmosphere, and the safety of the fluidized-bed gasification furnace 10 can be enhanced.
  • the filling density of the combustibles 14 to be received is enhanced by a first combustible supplying mechanism including the hopper 38, the pusher 39, and the chute 37 so as to provide sealing effects to prevent leakage of external air.
  • the combustibles 14 intermittently supplied are supplied into the fluidized-bed gasification furnace 10 at a predetermined rate by a second combustible supplying mechanism including the hopper 36, the combustible supplying means 33, and the combustible supplying means 30 while the sealing effects provided by the combustibles 14 are maintained.
  • a special sealing mechanism such as a damper.
  • FIG 3 shows an embodiment in which the combustible supplying means 30 in FIG 2 is replaced with a chute 43.
  • a constant amount of combustibles supplied is achieved by the pusher 40, the screw conveyor 34, and the scraping device 41 of the combustible supplying means 33. Accordingly, the combustible supplying means 30 does not need to supply combustibles at a constant rate. Therefore, in the embodiment shown in FIG 3, the combustible supplying means 30 is eliminated so as to supply combustibles 14 from the combustible supplying means 33 through the chute 43 directly into the fluidized-bed gasification furnace 10. With the structure shown in FIG 3, the chute 43 needs to have a proper inclination angle. Therefore, the entire combustible supplying facility is inevitably located at a high position.
  • FIG 4 is a diagram showing a schematic arrangement example of another fluidized-bed gasification furnace and another combustible supplying apparatus according to the present invention.
  • the same or corresponding parts are designated by the same reference numerals as those in FIGS. 2 and 3, and details thereof will be omitted.
  • details of structures of a waste pit 501, which supplies combustibles 14 into a hopper 38, are illustrated. Specifically, combustibles 14 are delivered through a waste introduction door 502 into the waste pit 501 while outside air is blocked. The combustibles 14 delivered into the waste pit 501 are introduced into the hopper 38 by a crane 21 or the like.
  • the internal pressure of the waste pit 501 is maintained to be a negative pressure, so that a gas in the waste pit 501 does not flow out the waste pit 501 (this holds true in the embodiments shown in FIGS. 2 and 3).
  • Material sealing is effectively performed to the combustibles 14 in the hopper 38 by consolidated combustibles 14, which have been pushed at a lower portion of the hopper 38 by the pusher 39.
  • External air or a gas in the waste pit 501 can be prevented from flowing into the fluidized-bed gasification furnace 10 by material sealing provided by the combustibles 14 consolidated at the lower portion of the hopper 38.
  • a predetermined amount of combustibles 14 is fed and introduced into the hopper 36 by the pusher 39.
  • So-called spilled wastes produced when the pusher 39 is retracted are delivered and returned to the waste pit 501 by a dedicated conveyor, which is not shown. Since a level sensor 18 is provided in the hopper 36, the pusher 39 can be operated so that the amount of combustibles 14 in the hopper 36 is maintained to a constant value. Material sealing provided by the combustibles 14 in the hopper 36 can also prevent external air from flowing into the fluidized-bed gasification furnace 10.
  • a pusher portion 403 is pushed into the hopper 36 by a driving portion 401 of the pusher 40 to press the combustibles 14 against the screw 34, as with the effects of the pusher 40 shown in FIG 2.
  • a scraping device 41 is provided at an outlet of the screw 34.
  • the combustibles 14 pushed by the screw 34 are mechanically scraped to make supply of the screw 34 constant more effectively.
  • the combustibles 14 which have passed the scraping device 41 are supplied through the chute 43 into the fluidized-bed gasification furnace 10.
  • a relief valve 42 is provided in the combustible supplying means 33 so that a combustible gas leaking from the fluidized-bed gasification furnace 10 is released from the relief valve 42 through a pipe (supplying means) 500 into the waste pit 501 when the interior of the fluidized-bed gasification furnace 10 has a positive pressure.
  • a path such that the combustible gas leaking from the fluidized-bed gasification furnace 10 is drawn from the relief valve 42 by a blower and introduced directly into a combustion gas pipe 700.
  • a gas in the waste pit 501 is continuously drawn by a forced draft blower 504.
  • the amount of gas drawn can be adjusted by a valve 503. It is desirable that the gas introduced into the combustion gas pipe 700 is mixed with air separately introduced from an external space and then used as combustion air for the fluidized-bed gasification furnace 10 and/or a slagging combustion furnace in a gasification and slagging combustion system.
  • an emergency shutoff valve 44 is provided in the chute 43, and that the emergency shutoff valve 44 is closed at the time of emergency or at the beginning of operation, because it is possible to prevent a combustible gas in the fluidized-bed gasification furnace 10 from leaking out through the combustible supplying apparatus to the exterior of the system.
  • FIG 5 is a schematic diagram showing an example of an entire system in which a combustible supplying apparatus according to the present invention is applied to a gasification and slagging combustion system.
  • the gasification and slagging combustion system is defined as a system which gasifies combustibles in a gasification furnace, introduces products such as gas, char, tar produced in the gasification furnace into a slagging combustion furnace, and combusts the products at a high temperature in the slagging combustion furnace to melt ash content contained in the products into slag.
  • the gasification and slagging combustion system will be described with reference to FIG 5.
  • a combustible gas 17 as a product produced in a fluidized-bed gasification furnace 10 is introduced into a slagging combustion furnace 800 so as to form a circulating flow in the slagging combustion furnace 800.
  • Combustion air 801 is introduced in tangential directions of the circulating flow to convert ash content into slag mist.
  • the slag mist is trapped on furnace walls by circulating effect of the gas.
  • the molten slag discharged through a slag discharge port 802 is converted into water granulated slag in a water chamber 803 and discharged to the exterior of the system by a conveyor 804.
  • heat of a combustion exhaust gas produced in the slagging combustion furnace 800 is recovered as steam by a waste heat boiler 900, and the combustion exhaust gas is cooled in a gas cooling chamber 901. After fly ash is collected by a bag filter 902, the combustion exhaust gas is discharged to the exterior of the system.
  • the entire gasification and slagging combustion system is maintained at a negative pressure by an induced draft fan 903.
  • Such a gasification and slagging combustion system may employ a combustible supplying apparatus shown in FIG 2 or 3.
  • the use of a combustible supplying apparatus which can prevent external air from leaking into a gasification furnace and does not require any mechanical sealing mechanisms such as a double damper can allow a gasification and slagging combustion system to be operated extremely safely. Furthermore, improvement of sealing and improvement of constant supply have heretofore been antinomic problems.
  • the use of a supplying apparatus according to the present invention can achieve a combustible supplying method which is superior in sealing effects and constant supply. Further, even if a combustible gas leaks through the combustible supplying apparatus, the present system can treat the combustible gas safely.
  • combustibles are supplied to a hopper while external air is prevented from leaking into the gasification furnace together with the combustibles.
  • a method of supplying combustibles to a gasification furnace which can prevent external air from leaking into the gasification furnace and does not require any special sealing mechanisms such as a double damper.
  • the combustibles in the hopper are supplied to the gasification furnace in fixed quantity while an amount of stored combustibles supplied to the hopper is controlled so as to be constant.
  • combustibles are supplied to a hopper by a first combustible supplying mechanism while external air is prevented from leaking into the gasification furnace.
  • a combustible supplying apparatus for supplying combustibles to a gasification furnace and a gasification and slagging combustion system which can prevent external air from leaking into the gasification furnace and does not require any special sealing mechanisms such as a double damper.
  • the combustibles in the hopper are supplied to the gasification furnace in fixed quantity while an amount of stored combustibles supplied to the hopper is controlled so as to be constant.
  • a combustible supplying apparatus for supplying combustibles to a gasification furnace and a gasification and slagging combustion system which can release, through a relief valve, a combustible gas which leaks from the gasification furnace when the gasification furnace has a positive pressure and can introduce the combustible gas to a waste pit by supplying means. Because air is continuously drawn from the waste pit and used for combustion, a combustible gas can be treated safely.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Incineration Of Waste (AREA)
EP03706956A 2003-02-18 2003-02-18 Method and device for feeding inflammables to gasifying furnace, and gasification melting system Withdrawn EP1736527A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/001736 WO2004074409A1 (ja) 2003-02-18 2003-02-18 ガス化炉への可燃物供給方法及び装置及びガス化溶融システム

Publications (2)

Publication Number Publication Date
EP1736527A4 EP1736527A4 (en) 2006-12-27
EP1736527A1 true EP1736527A1 (en) 2006-12-27

Family

ID=32894216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03706956A Withdrawn EP1736527A1 (en) 2003-02-18 2003-02-18 Method and device for feeding inflammables to gasifying furnace, and gasification melting system

Country Status (5)

Country Link
EP (1) EP1736527A1 (ja)
JP (1) JPWO2004074409A1 (ja)
AU (1) AU2003211226A1 (ja)
TW (1) TW200506278A (ja)
WO (1) WO2004074409A1 (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007113497A1 (en) * 2006-04-06 2007-10-11 Peter Stein Hybrid feed mechanism
WO2007103771A3 (en) * 2006-03-06 2008-01-31 Robert E Klepper Method and apparatus for producing synthesis gas from waste materials
US8182561B2 (en) 2008-01-16 2012-05-22 Shell Oil Company Process to provide a particulate solid material to a pressurised reactor
EP2685166A1 (en) * 2011-03-11 2014-01-15 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Garbage supply device
EP2693119A1 (en) * 2011-03-28 2014-02-05 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Waste material supply device and waste material processing device
JP2014181843A (ja) * 2013-03-19 2014-09-29 Dowa Eco-System Co Ltd 粉体状の廃棄物供給装置、及び粉体状の廃棄物の供給方法
EP2833062A4 (en) * 2012-03-30 2015-11-25 Hangzhou Hengming Environmental Technology Co Ltd SYSTEM OF TREATMENT AND USE OF SOLID WASTE WASTE
EP2180255A4 (en) * 2007-08-21 2015-12-23 Kobelco Eco Solutions Co Ltd WASTE SUPPLY DEVICE, METHOD OF SEPARATING AND WASTE TRANSFER METHOD
EP2534424A4 (en) * 2010-02-10 2017-11-29 KiOR, Inc. Improved biomass feed system/process

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007255816A (ja) * 2006-03-24 2007-10-04 Mitsubishi Heavy Ind Ltd 廃棄物供給装置及び廃棄物処理装置
JP5421051B2 (ja) * 2009-10-08 2014-02-19 株式会社大川原製作所 焼却設備並びに焼却設備運転方法
CN103528066B (zh) * 2012-07-05 2016-01-27 蒋华俊 垃圾处理装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111665A (en) * 1975-09-09 1978-09-05 Steag A.G. Apparatus for the gasification under pressure of bituminous coal, especially of fine coal in a generator
US4140228A (en) * 1977-12-01 1979-02-20 The United States Of America As Represented By The United States Department Of Energy Dry piston coal feeder
WO1999034662A1 (en) * 1998-01-06 1999-07-15 Emery Recycling Corporation Apparatus and method for introducing compressible fuel into a gasifier
WO2003012013A1 (en) * 2001-08-02 2003-02-13 T.G.E. Tech. Ltd. Method and apparatus for the treatment of domestic waste

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001279264A (ja) * 2000-03-29 2001-10-10 Toshiba Corp 熱分解炉装置
JP2001289422A (ja) * 2000-04-10 2001-10-19 Babcock Hitachi Kk ガス化処理システム
JP2003056822A (ja) * 2001-08-16 2003-02-26 Ebara Corp 流動層ガス化炉の可燃物供給方法及び可燃物供給装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111665A (en) * 1975-09-09 1978-09-05 Steag A.G. Apparatus for the gasification under pressure of bituminous coal, especially of fine coal in a generator
US4140228A (en) * 1977-12-01 1979-02-20 The United States Of America As Represented By The United States Department Of Energy Dry piston coal feeder
WO1999034662A1 (en) * 1998-01-06 1999-07-15 Emery Recycling Corporation Apparatus and method for introducing compressible fuel into a gasifier
WO2003012013A1 (en) * 2001-08-02 2003-02-13 T.G.E. Tech. Ltd. Method and apparatus for the treatment of domestic waste

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004074409A1 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007103771A3 (en) * 2006-03-06 2008-01-31 Robert E Klepper Method and apparatus for producing synthesis gas from waste materials
WO2007113497A1 (en) * 2006-04-06 2007-10-11 Peter Stein Hybrid feed mechanism
US8100066B2 (en) 2006-04-06 2012-01-24 Peter Stein Hybrid feed mechanism
EP2180255A4 (en) * 2007-08-21 2015-12-23 Kobelco Eco Solutions Co Ltd WASTE SUPPLY DEVICE, METHOD OF SEPARATING AND WASTE TRANSFER METHOD
US9149779B2 (en) 2008-01-16 2015-10-06 Shell Oil Company Process to provide a particulate solid material to a pressurised reactor
US8182561B2 (en) 2008-01-16 2012-05-22 Shell Oil Company Process to provide a particulate solid material to a pressurised reactor
EP2534424A4 (en) * 2010-02-10 2017-11-29 KiOR, Inc. Improved biomass feed system/process
EP2685166A4 (en) * 2011-03-11 2015-04-01 Mitsubishi Heavy Ind Environmental & Chemical Eng Co Ltd WASTE FEEDER
EP2685166A1 (en) * 2011-03-11 2014-01-15 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Garbage supply device
US9869472B2 (en) 2011-03-11 2018-01-16 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Garbage supply device
EP2693119A1 (en) * 2011-03-28 2014-02-05 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Waste material supply device and waste material processing device
EP2693119A4 (en) * 2011-03-28 2014-10-08 Mitsubishi Heavy Ind Environmental & Chemical Eng Co Ltd WASTE MANAGEMENT DEVICE AND WASTE PROCESSING DEVICE
US9702553B2 (en) 2011-03-28 2017-07-11 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. Waste material supply device and waste material processing device
EP2833062A4 (en) * 2012-03-30 2015-11-25 Hangzhou Hengming Environmental Technology Co Ltd SYSTEM OF TREATMENT AND USE OF SOLID WASTE WASTE
JP2014181843A (ja) * 2013-03-19 2014-09-29 Dowa Eco-System Co Ltd 粉体状の廃棄物供給装置、及び粉体状の廃棄物の供給方法

Also Published As

Publication number Publication date
EP1736527A4 (en) 2006-12-27
TW200506278A (en) 2005-02-16
AU2003211226A1 (en) 2004-09-09
JPWO2004074409A1 (ja) 2006-06-01
WO2004074409A1 (ja) 2004-09-02

Similar Documents

Publication Publication Date Title
EP1736527A1 (en) Method and device for feeding inflammables to gasifying furnace, and gasification melting system
CN104981658B (zh) 气化燃烧系统
KR100910427B1 (ko) 가스화 용융 시스템의 연소 제어방법 및 해당 시스템
JP2006242535A (ja) 移動床ガス化炉への被処理物の供給方法および移動床ガス化炉
JP2003056822A (ja) 流動層ガス化炉の可燃物供給方法及び可燃物供給装置
JP2003056822A5 (ja)
JP4209701B2 (ja) 可燃物のガス化方法及び装置並びにガス化溶融システム
JP2006052931A (ja) 塵芥と汚泥とを合わせて処理する廃棄物処理炉および廃棄物処理装置
EP1385923B1 (en) Gasification apparatus and method of operating the same
JP4048657B2 (ja) 廃棄物熱分解ガス化装置
JP2007147270A (ja) 廃棄物の処理方法及びガス化及び熔融装置
JP2019190730A (ja) 廃棄物ガス化溶融装置及び廃棄物ガス化溶融方法
JP3902123B2 (ja) ガス化溶融装置の溶融炉温度補償装置及び溶融炉温度補償方法
JP6299467B2 (ja) 廃棄物ガス化溶融装置及び廃棄物ガス化溶融方法
JPH04273911A (ja) 廃棄物焼却炉の燃焼制御方法
JPH0816526B2 (ja) 流動床式焼却炉における循環粒量の制御方法およびその装置
JP2799550B2 (ja) 溶融炉
JP2005121342A (ja) 循環流動層炉の運転方法
EP1590604A1 (en) Gasification and slagging combustion system and method
KR20050092088A (ko) 가스화 노에의 가연물 공급방법과 장치 및 가스화용융시스템
JP2001355807A (ja) 流動床炉における流動層温度制御方法および流動床炉
JP2001300467A (ja) 廃棄物の処理方法及びその装置
JP2002106819A (ja) 循環流動層燃焼装置及びその燃焼方法
JP2005090895A (ja) 流動床炉、流動床炉の運転方法及び流動床ガス化溶融装置
JP2002030290A (ja) ガス化炉

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040416

A4 Supplementary search report drawn up and despatched

Effective date: 20060419

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1099334

Country of ref document: HK

17Q First examination report despatched

Effective date: 20110622

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160308

REG Reference to a national code

Ref country code: HK

Ref legal event code: WD

Ref document number: 1099334

Country of ref document: HK