WO2024047685A1 - Appareil de traitement de déchets et procédé de traitement - Google Patents

Appareil de traitement de déchets et procédé de traitement Download PDF

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Publication number
WO2024047685A1
WO2024047685A1 PCT/JP2022/032341 JP2022032341W WO2024047685A1 WO 2024047685 A1 WO2024047685 A1 WO 2024047685A1 JP 2022032341 W JP2022032341 W JP 2022032341W WO 2024047685 A1 WO2024047685 A1 WO 2024047685A1
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WO
WIPO (PCT)
Prior art keywords
waste
drying
cement
raw material
preheated raw
Prior art date
Application number
PCT/JP2022/032341
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English (en)
Japanese (ja)
Inventor
泰史 山本
Original Assignee
太平洋エンジニアリング株式会社
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 太平洋エンジニアリング株式会社 filed Critical 太平洋エンジニアリング株式会社
Priority to PCT/JP2022/032341 priority Critical patent/WO2024047685A1/fr
Priority to TW112108545A priority patent/TW202409493A/zh
Publication of WO2024047685A1 publication Critical patent/WO2024047685A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • 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
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/06—Continuous processes
    • C10J3/12—Continuous processes using solid heat-carriers

Definitions

  • the present invention relates to a waste treatment device and a treatment method, and in particular to a device and method for effectively utilizing combustible waste with a high moisture content or waste containing combustibles as fuel for a cement firing device.
  • Patent Documents 1 and 2 describe a gasifier that gasifies waste including sludge, etc., and a calciner for cement manufacturing equipment that uses flammable gas generated in the gasifier while containing char and ash.
  • a waste treatment facility is described which includes a gas conveyance path for conveying gas to
  • Japan Special Publication No. 2013-540051 Japan special table publication No. 2014-500840
  • Patent Documents 1 and 2 above have a problem in that the amount of heat of the combustible gas generated in the gasifier decreases due to the fluidized air supplied to the gasifier and the moisture contained in the waste. Ta.
  • Patent Document 1 describes that a drying device is provided before the gasifier, but if waste is dried with hot air, large-scale odor countermeasures are required depending on the type of waste. There was also the problem.
  • the present invention has been made in view of the above-mentioned problems in the prior art, and it is possible to prevent a decrease in the calorific value of combustible gas obtained by gasifying waste and to minimize odor countermeasures.
  • the purpose of the present invention is to provide a possible waste treatment device and treatment method.
  • the present invention provides a waste processing apparatus, which includes a drying apparatus for drying waste, and a drying apparatus for separating dry matter discharged from the drying apparatus from a preheater cyclone of a cement firing apparatus. It is characterized by comprising a gasification furnace that heats and gasifies preheated raw materials, and a flammable gas supply device that supplies flammable gas generated in the gasification furnace to the calciner or cement kiln of the cement firing device. shall be.
  • the waste after drying the waste, it is heated and gasified using the preheated raw material taken from the preheater cyclone of the cement firing equipment without using fluidizing air, so that no waste is generated in the gasification furnace. It is possible to prevent a decrease in the calorific value of the combustible gas.
  • the outlet temperature of the gasifier so that the outlet temperature of the drying device is equal to or higher than a predetermined value, the moisture content of the dried material can be adjusted to a predetermined value or less.
  • the outlet temperature can be controlled by the amount of preheated raw material taken out from the preheater cyclone of the cement calciner.
  • the preheated raw material can be separated from the discharged material of the drying device and introduced into the cement kiln of the cement firing device to be used as a cement raw material.
  • the present invention also provides a method for treating waste, in which the waste is dried, and the dried material obtained by the drying is heated and gasified with a preheated raw material taken from a preheater cyclone of a cement firing device.
  • the method is characterized in that the flammable gas obtained by gasification is supplied to a calciner or cement kiln of the cement firing apparatus.
  • the preheated raw material is heated and gasified without using fluidizing air or the like, it is possible to prevent a decrease in the calorific value of the generated combustible gas.
  • the preheated raw material can be separated from the mixture of the dried waste after drying and the residue used for drying, and introduced into the cement kiln of the cement firing apparatus to be used as a cement raw material.
  • FIG. 1 is an overall configuration diagram showing an embodiment of a waste treatment apparatus according to the present invention.
  • FIG. 1 shows an embodiment of a waste processing apparatus (hereinafter referred to as "processing apparatus") according to the present invention.
  • the device 30 is provided for processing.
  • the processing device 1 includes a magnetic separator 2 that removes magnetic metals such as iron pieces I from municipal waste W1, an electrostatic separator 3 that removes aluminum from the municipal waste W2 after removing iron pieces I, and an electrostatic separator 3 that removes aluminum from the municipal waste W2 after removing iron pieces I.
  • a specific gravity sorter 4 removes other metals M from the municipal waste W3 discharged from the separator 3; a crusher 5 crushes the municipal waste W4 discharged from the specific gravity sorter 4;
  • a drying device 6 for drying the shredded material W5, a vibrating sieve 7 for sorting the dried material D discharged from the drying device 6, and a vibrating sieve 7 for sorting the dried waste W6 sorted by the vibrating sieve 7 to heat and gasify it.
  • a gasification furnace 8 is provided.
  • the magnetic separator 2, the electrostatic separator 3, and the specific gravity separator 4 are devices that are generally used in the treatment of waste, etc., and if they can remove various metals from the municipal waste W1, they can be used in other ways. It can also be a device configuration. Further, the crusher 5 may not be necessary depending on the nature of the municipal waste W4 discharged from the specific gravity sorter 4.
  • the drying device 6 is provided to dry the crushed material W5 from the crusher 5 using the residue S generated in the gasifier 8, and is used to dry the crushed material W5 from the crusher 5 using the residue S as a powdered or granular solid heat medium. Since W5 is dried, there is no need to take large-scale odor countermeasures as in the case of drying with hot air.
  • the exhaust gas G2 from the drying device 6 is introduced into the outlet gas duct of the lowermost cyclone 31 of the cement baking device 30.
  • the vibrating sieve 7 is arranged to separate the dried material D discharged from the drying device 6 (a mixture of the dried waste material and the residue S of the gasification furnace 8) into the dried waste material W6 and the preheated raw material R2. be done.
  • the gasifier 8 is arranged to heat and gasify the dry waste W6 with the preheated raw material R1 separated by the screw conveyor 35 from the raw material chute 34 of the lowermost cyclone 31 of the preheater of the cement firing device 30. Ru.
  • the combustible gas G1 generated in the gasifier 8 is supplied to the calciner 33 via a combustible gas supply device (not shown).
  • a screw conveyor 35 for fractionating the preheated raw material R1 is arranged in the raw material chute 34 of the lowermost cyclone 31.
  • the screw conveyor 35 has an opening formed by removing the upper half of the casing, and separates the preheated raw material R1 from this opening and introduces it into the gasifier 8.
  • a magnetic separator 2, an electrostatic separator 3, and a specific gravity separator 4 remove various metals (iron pieces, etc. I, aluminum Al, and other metals M) from the municipal waste W1, and a shredder 5 crushes the municipal waste W4. do.
  • the crushed material W5 is dried in the drying device 6 using the residue S from the gasifier 8.
  • the preheated raw material R1 taken out from the lowermost cyclone 31 of the cement firing apparatus 30 can be used for drying.
  • the dried material D discharged from the drying device 6 is separated into the waste dry material W6 and the preheated raw material R2 in the vibrating sieve 7, the dried material W6 is supplied to the gasifier 8, and the preheated raw material R2 is sent to the cement kiln 32. Or it is introduced into the cement raw material system and used as a cement raw material.
  • the dry waste W6 is heated and gasified using the preheated raw material R1 separated from the lowermost cyclone 31 of the cement firing device 30 in the gasification furnace 8, and the flammable gas G1 generated by the gasification is transferred to the combustible gas supply device. (not shown) to the calcining furnace 33 and used as fuel. At that time, it may be introduced into the existing calciner burner 33a, or it may be blown into the calciner 33 from a separately provided dedicated nozzle or the like. On the other hand, the residue S from the gasifier 8 is returned to the drying device 6 and used for drying.
  • the exhaust gas G2 containing water vapor discharged from the drying device 6 is introduced into the outlet gas duct of the lowermost cyclone 31 of the cement baking device 30 if it has an odor, and if it has no odor, it is introduced into the outlet gas duct of the lowermost cyclone 31. It is introduced into an upper preheater cyclone or an exhaust gas induction fan placed after the preheater for treatment.
  • the outlet temperature of the drying device 6 (the temperature of the dried material D discharged from the drying device 6) is controlled at 100° C. or higher, preferably 120° C. or higher, so that the moisture content of the dried material D is below the target value.
  • the outlet temperature of the device 6 is adjusted by controlling the outlet temperature of the gasifier 8.
  • the outlet temperature of the gasifier 8 is controlled to about 520°C.
  • cascade control may be performed to control the amount of the preheated raw material R1 taken out so that the outlet temperature of the gasifier 8 reaches a predetermined target value.
  • the preheated raw material R1 may be added to the residue S of the gasifier 8.
  • the preheated raw material R1 from the lowermost cyclone 31 is used as the heat medium in the gasifier 8, but the preheated raw material separated by the preheater cyclone located above the lowermost cyclone 31 may be used. You can also do it.
  • the combustible gas G1 generated in the gasifier 8 was supplied to the calciner 33 and used as fuel, it can also be supplied to the cement kiln 32 and used as fuel.
  • the flammable gas G1 may be introduced into the cement kiln burner, or it may be blown into the cement kiln from a special nozzle installed separately from the cement kiln burner, or the flammable gas G1 may be introduced from the front of the cement kiln. Any configuration may be used as long as it is a flammable gas supply device that can be supplied into a cement kiln.
  • Processing device 2 Magnetic separator 3
  • Electrostatic separator 4 Specific gravity sorter 5
  • Shredder 6 Drying device 7
  • Vibrating sieve 8 Gasifier 20
  • Garbage treatment plant 30 Cement calcining device 31
  • Lowermost cyclone 32
  • Cement kiln 33
  • Calciner 34 Raw material chute 35 Screw conveyor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Treatment Of Sludge (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

[Problème] réduire au minimum les contre-mesures contre les odeurs en empêchant une diminution de la quantité de chaleur d'un gaz combustible obtenu par la gazéification de déchets. [Solution] L'appareil de traitement de déchets 1 selon la présente invention comprend : un dispositif de séchage 6 qui sèche des déchets (matériau broyé) W5 ; un four de gazéification 8 qui chauffe et gazéifie la matière séchée, évacuée du dispositif de séchage, au moyen d'une matière première préchauffée R1 fractionnée à partir d'un cyclone de préchauffage (cyclone le plus bas) 31 d'un dispositif de cuisson de ciment 30 ; et un dispositif d'alimentation en gaz combustible qui fournit un gaz combustible G1 généré à partir du four de gazéification à un four de calcination 33 ou à un four à ciment 32 du dispositif de cuisson de ciment. Les résidus S générés à partir du four de gazéification peuvent être introduits dans le dispositif de séchage et utilisés pour sécher les déchets. La température de sortie du four de gazéification peut être régulée de telle sorte que la température de sortie du dispositif de séchage est égale ou supérieure à une valeur prédéterminée.
PCT/JP2022/032341 2022-08-29 2022-08-29 Appareil de traitement de déchets et procédé de traitement WO2024047685A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2022/032341 WO2024047685A1 (fr) 2022-08-29 2022-08-29 Appareil de traitement de déchets et procédé de traitement
TW112108545A TW202409493A (zh) 2022-08-29 2023-03-08 廢棄物之處理裝置及處理方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/032341 WO2024047685A1 (fr) 2022-08-29 2022-08-29 Appareil de traitement de déchets et procédé de traitement

Publications (1)

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WO2024047685A1 true WO2024047685A1 (fr) 2024-03-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07109155A (ja) * 1993-04-17 1995-04-25 Ssangyong Cement Ind Co Ltd 燃料のガス化装置を付設したセメント原料のか焼装置
JPH09235148A (ja) * 1996-03-02 1997-09-09 Noel Krc Energ & Umwelttechnik Gmbh セメント炉中で残留物および廃棄物ならびに低発熱量燃料を利用する方法
JP2001342044A (ja) * 2000-05-29 2001-12-11 Taiheiyo Cement Corp 石灰焼成炉
JP2013540051A (ja) * 2010-10-21 2013-10-31 川崎重工業株式会社 汚泥を含む廃棄物の処理設備
JP2014500840A (ja) * 2010-10-21 2014-01-16 川崎重工業株式会社 廃棄物処理設備

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07109155A (ja) * 1993-04-17 1995-04-25 Ssangyong Cement Ind Co Ltd 燃料のガス化装置を付設したセメント原料のか焼装置
JPH09235148A (ja) * 1996-03-02 1997-09-09 Noel Krc Energ & Umwelttechnik Gmbh セメント炉中で残留物および廃棄物ならびに低発熱量燃料を利用する方法
JP2001342044A (ja) * 2000-05-29 2001-12-11 Taiheiyo Cement Corp 石灰焼成炉
JP2013540051A (ja) * 2010-10-21 2013-10-31 川崎重工業株式会社 汚泥を含む廃棄物の処理設備
JP2014500840A (ja) * 2010-10-21 2014-01-16 川崎重工業株式会社 廃棄物処理設備

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Publication number Publication date
TW202409493A (zh) 2024-03-01

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