WO2024047685A1 - Waste treatment apparatus and treatment method - Google Patents
Waste treatment apparatus and treatment method Download PDFInfo
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- 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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- Prior art keywords
- waste
- drying
- cement
- raw material
- preheated raw
- Prior art date
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- 239000002699 waste material Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 9
- 239000004568 cement Substances 0.000 claims abstract description 49
- 238000001035 drying Methods 0.000 claims abstract description 47
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 238000010304 firing Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000002309 gasification Methods 0.000 claims abstract description 15
- 238000001354 calcination Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 abstract description 6
- 235000019645 odor Nutrition 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000005484 gravity Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000006148 magnetic separator Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010849 combustible waste Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- 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
Abstract
[Problem] To minimize countermeasures against odors by preventing a decrease in the heat quantity of a combustible gas obtained through the gasification of waste. [Solution] This waste treatment apparatus 1 comprises: a drying device 6 that dries waste (crushed material) W5; a gasifying furnace 8 that heats and gasifies dried matter, discharged from the drying device, by means of a preheated raw material R1 fractionated from a preheater cyclone (lowermost cyclone) 31 of a cement firing device 30; and a combustible gas supplying device that supplies a combustible gas G1 generated from the gasifying furnace to a calcination furnace 33 or a cement kiln 32 of the cement firing device. Residues S generated from the gasifying furnace may be introduced into the drying device and used for drying waste. The outlet temperature of the gasifying furnace may be controlled so that the outlet temperature of the drying device is equal to or higher than a predetermined value.
Description
本発明は、廃棄物の処理装置及び処理方法に関し、特に、含水率の高い可燃性廃棄物もしくは可燃分を含む廃棄物をセメント焼成装置の燃料として有効利用する装置及び方法に関する。
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.
従来、都市ごみ、汚泥等の含水率の高い可燃性廃棄物をセメント製造工程で燃料の代替として用い、廃棄物処理に資すると共に、セメント製造における高価な化石燃料の原単位を低減する試みがなされている。
In the past, attempts have been made to use combustible waste with high moisture content, such as municipal waste and sludge, as a substitute for fuel in the cement manufacturing process, contributing to waste treatment and reducing the consumption of expensive fossil fuels in cement manufacturing. ing.
例えば、特許文献１及び２には、汚泥等を含む廃棄物をガス化するガス化炉と、ガス化炉で発生した可燃性ガスをチャー及び灰分を含んだままセメント製造設備の仮焼炉等に搬送するガス搬送路を備える廃棄物処理設備が記載されている。
For example, 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
しかし、上記特許文献１及び２に記載の発明では、ガス化炉に供給される流動化空気と廃棄物に含まれる水分によってガス化炉で発生する可燃性ガスの熱量が低下するという問題があった。
However, the inventions described in 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.
また、上記特許文献１には、ガス化炉の前段に乾燥装置を設けることが記載されているが、熱風で廃棄物を乾燥させると、廃棄物の種類によっては大掛かりな臭気対策が必要となるという問題もあった。
Further, Patent Document 1 mentioned above 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.
そこで、本発明は、上記従来技術における問題点に鑑みてなされたものであって、廃棄物をガス化して得られる可燃性ガスの熱量の低下を防止し、臭気対策を最小限に抑えることが可能な廃棄物の処理装置及び処理方法を提供することを目的とする。
Therefore, 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.
上記目的を達成するため、本発明は、廃棄物の処理装置であって、廃棄物を乾燥させる乾燥装置と、該乾燥装置から排出される乾燥物を、セメント焼成装置のプレヒータサイクロンから分取した予熱原料で加熱してガス化するガス化炉と、該ガス化炉で発生した可燃性ガスを前記セメント焼成装置の仮焼炉又はセメントキルンに供給する可燃性ガス供給装置とを備えることを特徴とする。
In order to achieve the above object, 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.
本発明によれば、廃棄物を乾燥させた後、流動化空気等を用いずに、セメント焼成装置のプレヒータサイクロンから分取した予熱原料で加熱してガス化するため、ガス化炉で発生する可燃性ガスの熱量の低下を防止することができる。
According to the present invention, 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.
上記廃棄物の処理装置において、前記ガス化炉で発生した残渣を前記乾燥装置に導入して前記廃棄物の乾燥に用いることで、熱風で乾燥させる場合のような大掛かりな臭気対策が不要となる。
In the waste treatment equipment described above, by introducing the residue generated in the gasification furnace into the drying equipment and using it for drying the waste, there is no need for large-scale odor countermeasures as in the case of drying with hot air. .
また、前記乾燥装置の出口温度が所定値以上になるように、前記ガス化炉の出口温度を制御することで、乾燥物の水分を所定値以下に調整することができ、前記ガス化炉の出口温度を、前記セメント焼成装置のプレヒータサイクロンから分取する予熱原料の量によって制御することができる。
Furthermore, by controlling 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.
さらに、前記乾燥装置の排出物から前記予熱原料を分離し、前記セメント焼成装置のセメントキルンに導入してセメント原料として用いることができる。
Furthermore, 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.
また、本発明は、廃棄物の処理方法であって、廃棄物を乾燥させ、該乾燥によって得られる乾燥物を、セメント焼成装置のプレヒータサイクロンから分取した予熱原料で加熱してガス化し、該ガス化によって得られる可燃性ガスを前記セメント焼成装置の仮焼炉又はセメントキルンに供給することを特徴とする。
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.
本発明によれば、上記発明と同様に、流動化空気等を用いずに予熱原料で加熱してガス化するため、発生する可燃性ガスの熱量の低下を防止することができる。
According to the present invention, similar to the above-described invention, since 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.
上記廃棄物の処理方法において、前記ガス化によって生じた残渣を廃棄物の乾燥に用いることで、熱風乾燥の場合と比較して小規模の装置で臭気処理が可能となる。
In the waste treatment method described above, by using the residue generated by the gasification to dry the waste, odor treatment can be performed with a smaller scale device than in the case of hot air drying.
また、前記乾燥後の廃棄物の乾燥物及び乾燥に用いた残渣の混合物から前記予熱原料を分離し、前記セメント焼成装置のセメントキルンに導入してセメント原料として利用することができる。
Furthermore, 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.
以上のように、本発明によれば、廃棄物をガス化して得られる可燃性ガスの熱量の低下を防止し、臭気対策を最小限に抑えることができる。
As described above, according to the present invention, it is possible to prevent a decrease in the calorific value of combustible gas obtained by gasifying waste, and to minimize odor countermeasures.
次に、本発明を実施するための形態について、図面を参照しながら詳細に説明する。
Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
図１は、本発明に係る廃棄物の処理装置（以下「処理装置」という。）の一実施の形態を示し、この処理装置１は、ごみ処理場２０から排出された都市ごみＷ１をセメント焼成装置３０で処理するために設けられる。
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.
処理装置１は、都市ごみＷ１から鉄片等Ｉの磁性金属を除去する磁力選別機２と、鉄片等Ｉを除去した後の都市ごみＷ２からアルミニウムＡｌを除去する静電分離機３と、静電分離機３から排出された都市ごみＷ３からその他の金属Ｍを除去する比重差選別機４と、比重差選別機４から排出された都市ごみＷ４を破砕する破砕機５と、破砕機５から排出された破砕物Ｗ５を乾燥させる乾燥装置６と、乾燥装置６から排出される乾燥物Ｄを選別する振動篩７と、振動篩７で選別された廃棄物の乾燥物Ｗ６を加熱してガス化するガス化炉８を備える。
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.
磁力選別機２、静電分離機３及び比重差選別機４は、廃棄物等の処理に一般的に用いられている装置であって、都市ごみＷ１から各種金属を除去することができれば他の装置構成とすることもできる。また、破砕機５は、比重差選別機４から排出された都市ごみＷ４の性状によっては設置不要である。
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.
乾燥装置６は、ガス化炉８で発生した残渣Ｓを用いて破砕機５からの破砕物Ｗ５を乾燥させるために設けられ、粉状又は粒状の固体熱媒体としての残渣Ｓを用いて破砕物Ｗ５を乾燥させるため、熱風で乾燥させる場合のような大掛かりな臭気対策が不要となる。乾燥装置６からの排ガスＧ２は、セメント焼成装置３０の最下段サイクロン３１の出口ガスダクトに導入される。
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.
振動篩７は、乾燥装置６から排出された乾燥物（廃棄物の乾燥物とガス化炉８の残渣Ｓの混合物）Ｄを、廃棄物の乾燥物Ｗ６と予熱原料Ｒ２に選別するために配置される。
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.
ガス化炉８は、セメント焼成装置３０のプレヒータの最下段サイクロン３１の原料シュート３４からスクリューコンベヤ３５で分取した予熱原料Ｒ１で廃棄物の乾燥物Ｗ６を加熱してガス化するために配置される。ガス化炉８で発生した可燃性ガスＧ１は、可燃性ガス供給装置（不図示）を介して仮焼炉３３へ供給される。
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).
セメント焼成装置３０において、最下段サイクロン３１の原料シュート３４には、予熱原料Ｒ１を分取するためのスクリューコンベヤ３５が配置される。スクリューコンベヤ３５は、ケーシングの上半分を除去した開口を有し、この開口から予熱原料Ｒ１を分取してガス化炉８に導入する。
In the cement firing apparatus 30, 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.
次に、上記構成を有する処理装置１を用いた本発明に係る廃棄物の処理方法について図１を参照しながら説明する。
Next, a waste processing method according to the present invention using the processing apparatus 1 having the above configuration will be described with reference to FIG. 1.
磁力選別機２、静電分離機３、比重差選別機４によって、都市ごみＷ１から各種金属（鉄片等Ｉ、アルミニウムＡｌ、その他の金属Ｍ）を除去し、破砕機５で都市ごみＷ４を破砕する。乾燥装置６でガス化炉８の残渣Ｓを用いて破砕物Ｗ５を乾燥させる。尚、初回運転時はセメント焼成装置３０の最下段サイクロン３１から分取した予熱原料Ｒ１を乾燥に用いることができる。
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. Incidentally, during the first operation, the preheated raw material R1 taken out from the lowermost cyclone 31 of the cement firing apparatus 30 can be used for drying.
乾燥装置６から排出された乾燥物Ｄは、振動篩７において、廃棄物の乾燥物Ｗ６と予熱原料Ｒ２に分離され、乾燥物Ｗ６はガス化炉８へ供給され、予熱原料Ｒ２はセメントキルン３２又はセメント原料系統に導入されてセメント原料として利用される。
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.
ガス化炉８でセメント焼成装置３０の最下段サイクロン３１から分取した予熱原料Ｒ１で廃棄物の乾燥物Ｗ６を加熱してガス化し、ガス化によって発生した可燃性ガスＧ１を可燃性ガス供給装置（不図示）を介して仮焼炉３３へ供給して燃料として利用する。その際、既設の仮焼炉バーナ３３ａに導入してもよく、別に設けた専用ノズル等から仮焼炉３３内に吹き込むこともできる。一方、ガス化炉８の残渣Ｓを乾燥装置６に戻して乾燥に利用する。
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.
上記実施の形態において、乾燥装置６から排出される水蒸気を含む排ガスＧ２は、臭気がある場合はセメント焼成装置３０の最下段サイクロン３１の出口ガスダクトに導入し、臭気がない場合は最下段サイクロン３１の上方のプレヒータサイクロン又はプレヒータの後段に配置された排ガス誘引ファン等に導入して処理する。
In the embodiment described above, 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.
乾燥装置６の出口温度（乾燥装置６から排出される乾燥物Ｄの温度）は、乾燥物Ｄの水分量が目標値以下となるように１００℃以上好ましくは１２０℃以上に制御し、この乾燥装置６の出口温度をガス化炉８の出口温度を制御することによって調整する。ガス化炉８の出口温度は５２０℃程度に制御する。また、ガス化炉８の出口温度が所定の目標値になるように予熱原料Ｒ１の分取量を制御するカスケード制御を行ってもよい。尚、乾燥装置６の出口温度を調整するために、ガス化炉８の残渣Ｓに予熱原料Ｒ１を追加してもよい。
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. Furthermore, 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. In addition, in order to adjust the outlet temperature of the drying device 6, the preheated raw material R1 may be added to the residue S of the gasifier 8.
尚、上記実施の形態では、最下段サイクロン３１からの予熱原料Ｒ１をガス化炉８における熱媒体として用いたが、最下段サイクロン３１より上方に位置するプレヒータサイクロンで分取した予熱原料を用いることもできる。
In the above embodiment, 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.
また、ガス化炉８で発生した可燃性ガスＧ１を仮焼炉３３へ供給して燃料として利用したが、セメントキルン３２に供給して燃料として利用することもできる。その際、可燃性ガスＧ１をセメントキルンバーナに導入してもよく、セメントキルンバーナとは別に設けた専用ノズル等からセメントキルン内に吹き込むこともでき、可燃性ガスＧ１をセメントキルンの窯前からセメントキルン内に供給することのできる可燃性ガス供給装置であればその構成は問わない。
Furthermore, although 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. At that time, 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.
尚、図示の実施形態はあくまでも例示であり、本発明の技術範囲を限定する趣旨の記述ではない。
Note that the illustrated embodiment is merely an example, and is not intended to limit the technical scope of the present invention.
１ 処理装置
２ 磁力選別機
３ 静電分離機
４ 比重差選別機
５ 破砕機
６ 乾燥装置
７ 振動篩
８ ガス化炉
２０ ごみ処理場
３０ セメント焼成装置
３１ 最下段サイクロン
３２ セメントキルン
３３ 仮焼炉
３４ 原料シュート
３５ スクリューコンベア 1Processing 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
２ 磁力選別機
３ 静電分離機
４ 比重差選別機
５ 破砕機
６ 乾燥装置
７ 振動篩
８ ガス化炉
２０ ごみ処理場
３０ セメント焼成装置
３１ 最下段サイクロン
３２ セメントキルン
３３ 仮焼炉
３４ 原料シュート
３５ スクリューコンベア 1
Claims (8)
- 廃棄物を乾燥させる乾燥装置と、
該乾燥装置から排出される乾燥物を、セメント焼成装置のプレヒータサイクロンから分取した予熱原料で加熱してガス化するガス化炉と、
該ガス化炉で発生した可燃性ガスを前記セメント焼成装置の仮焼炉又はセメントキルンに供給する可燃性ガス供給装置とを備えることを特徴とする廃棄物の処理装置。 a drying device for drying waste;
a gasification furnace that heats and gasifies the dried material discharged from the drying device with a preheated raw material collected from a preheater cyclone of the cement firing device;
A waste treatment device comprising: a combustible gas supply device that supplies flammable gas generated in the gasification furnace to a calcining furnace or a cement kiln of the cement firing device. - 前記ガス化炉で発生した残渣を前記乾燥装置に導入して前記廃棄物の乾燥に用いることを特徴とする請求項１に記載の廃棄物の処理装置。 The waste processing device according to claim 1, wherein the residue generated in the gasifier is introduced into the drying device and used for drying the waste.
- 前記乾燥装置の出口温度が所定値以上になるように、前記ガス化炉の出口温度を制御することを特徴とする請求項１又は２に記載の廃棄物の処理装置。 The waste treatment device according to claim 1 or 2, wherein the outlet temperature of the gasifier is controlled so that the outlet temperature of the drying device is equal to or higher than a predetermined value.
- 前記ガス化炉の出口温度を、前記セメント焼成装置のプレヒータサイクロンから分取する予熱原料の量によって制御することを特徴とする請求項１、２又は３に記載の廃棄物の処理装置。 4. The waste treatment apparatus according to claim 1, wherein the outlet temperature of the gasifier is controlled by the amount of preheated raw material separated from a preheater cyclone of the cement firing apparatus.
- 前記乾燥装置の排出物から前記予熱原料を分離し、前記セメント焼成装置のセメントキルンに導入することを特徴とする請求項２、３又は４に記載の廃棄物の処理装置。 The waste processing device according to claim 2, 3 or 4, wherein the preheated raw material is separated from the discharged material of the drying device and introduced into a cement kiln of the cement firing device.
- 廃棄物を乾燥させ、
該乾燥によって得られる乾燥物を、セメント焼成装置のプレヒータサイクロンから分取した予熱原料で加熱してガス化し、
該ガス化によって得られる可燃性ガスを前記セメント焼成装置の仮焼炉又はセメントキルンに供給することを特徴とする廃棄物の処理方法。 Dry the waste
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,
A method for treating waste, characterized in that the flammable gas obtained by the gasification is supplied to a calciner or a cement kiln of the cement firing apparatus. - 前記ガス化によって生じた残渣を前記廃棄物の乾燥に用いることを特徴とする請求項６に記載の廃棄物の処理方法。 The waste processing method according to claim 6, characterized in that the residue generated by the gasification is used for drying the waste.
- 前記乾燥後の廃棄物の乾燥物及び乾燥に用いた残渣の混合物から前記予熱原料を分離し、前記セメント焼成装置のセメントキルンに導入することを特徴とする請求項７に記載の廃棄物の処理方法。 The waste treatment according to claim 7, characterized in that the preheated raw material is separated from a mixture of the dried waste after the drying and the residue used for drying, and introduced into a cement kiln of the cement firing device. Method.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07109155A (en) * | 1993-04-17 | 1995-04-25 | Ssangyong Cement Ind Co Ltd | Cement material calcination device with fuel gasifying device |
| JPH09235148A (en) * | 1996-03-02 | 1997-09-09 | Noel Krc Energ & Umwelttechnik Gmbh | Use of residue, waste and fuel of low heating value in cement furnace |
| JP2001342044A (en) * | 2000-05-29 | 2001-12-11 | Taiheiyo Cement Corp | Lime firing furnace |
| JP2013540051A (en) * | 2010-10-21 | 2013-10-31 | 川崎重工業株式会社 | Waste treatment facilities including sludge |
| JP2014500840A (en) * | 2010-10-21 | 2014-01-16 | 川崎重工業株式会社 | Waste treatment facility |
-
2022
- 2022-08-29 WO PCT/JP2022/032341 patent/WO2024047685A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07109155A (en) * | 1993-04-17 | 1995-04-25 | Ssangyong Cement Ind Co Ltd | Cement material calcination device with fuel gasifying device |
| JPH09235148A (en) * | 1996-03-02 | 1997-09-09 | Noel Krc Energ & Umwelttechnik Gmbh | Use of residue, waste and fuel of low heating value in cement furnace |
| JP2001342044A (en) * | 2000-05-29 | 2001-12-11 | Taiheiyo Cement Corp | Lime firing furnace |
| JP2013540051A (en) * | 2010-10-21 | 2013-10-31 | 川崎重工業株式会社 | Waste treatment facilities including sludge |
| JP2014500840A (en) * | 2010-10-21 | 2014-01-16 | 川崎重工業株式会社 | Waste treatment facility |
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