JP3962641B2 - Organic waste treatment methods - Google Patents

Organic waste treatment methods Download PDF

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Publication number
JP3962641B2
JP3962641B2 JP2002198767A JP2002198767A JP3962641B2 JP 3962641 B2 JP3962641 B2 JP 3962641B2 JP 2002198767 A JP2002198767 A JP 2002198767A JP 2002198767 A JP2002198767 A JP 2002198767A JP 3962641 B2 JP3962641 B2 JP 3962641B2
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raw material
inner cylinder
organic waste
outer cylinder
passage
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JP2004034003A (en
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和樹 谷口
金子　　保
秀直 田中
忠明 森
保 上中
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Chugai Ro Co Ltd
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Chugai Ro Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/78—Recycling of wood or furniture waste

Description

【０００１】
【発明の属する技術分野】
本発明は、たとえば、鶏糞等の畜産廃棄物やバーク等木質系廃棄物等の有機性廃棄物の処理方法に関するものである。
【０００２】
【従来の技術】
従来、前記有機性廃棄物の処理方法としては、この廃棄物を空気比１．２以上で焼却灰化物とする第１の方法と、前記廃棄物を酸素不足雰囲気下で乾留することにより燃料、肥料、土壌改良材等として利用できる炭化物あるいはさらに水蒸気を添加することにより脱臭用や脱色用の吸着材として利用できる賦活物とする第２の方法とがある。
【０００３】
【発明が解決しようとする課題】
しかしながら、前記第１の方法と第２の方法とは、処理方法が根本的に異なるため、１つの装置で両方法を選択的に行なうことができない。
【０００４】
そして、前記のように、有機性廃棄物からの炭化物、賦活物、灰化物にはそれぞれの用途があるが、その需要量は常に一定でなく変動するため、有機性廃棄物を処理するには、少なくとも２つの異なる処理装置を必要とし設備費が高価になるという課題を有する。
【０００５】
また、第１の方法では、有機性廃棄物を空気比１．２以上で高温燃焼により焼却させるが、この場合、有害なダイオキシン類が発生する危険性があるため、ダイオキシン類の発生を抑制する必要があり、設備が高くなるという課題を有する。
【０００６】
本発明は、前記課題を解決するためになされたもので、同一装置を利用して、その処理条件を適宜選択することにより、前記有機性廃棄物を、ダイオキシン類を発生させることなく、炭化物、賦活物、灰化物のいずれかとして取り出すことのできる有機性廃棄物の処理方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は、前記目的を達成するために、外筒と、外筒内に位置し両端を前記外筒外方に突出し、回転駆動手段により回転する内部に１以上の貫通する原料搬送通路を軸方向に備えた内筒と、前記外筒と内筒間に形成した内筒加熱手段と、前記内筒の一端に相対回転可能に取り付けられ、前記内筒の原料搬送通路に有機性廃棄物を供給する原料供給手段を備えるとともに、前記原料搬送通路内に一端が突出する水蒸気供給管を備えた装入フードと、前記内筒の他端に相対回転可能に取り付けられ、前記原料搬送通路からの処理物を排出する排出手段と発生ガス排出口とを備えた抽出フードとで構成し、原料供給手段から投入された原料を内筒の回転により原料搬送通路内を移動させ処理物を排出手段から排出する外熱式ロータリーキルンにおいて、前記原料搬送通路内の酸素濃度を３％以下の酸素不足雰囲気とし、前記原料供給手段から投入される原料を前記原料搬送通路内で所定温度に昇温したのち所定時間保持することにより炭化物に、原料を７００℃以上の所定温度に昇温したのち所定時間保持し、その間に水蒸気を原料搬送通路内に供給して賦活物に、原料を７００℃以上に昇温したのち前記賦活物に対する保持時間および／または水蒸気供給量を大とすることにより灰化物に、選択的に前記いずれかの処理物として前記排出手段から取り出すようにしたものである。
【０００８】
【発明の実施の形態】
つぎに、本発明の実施の形態について図にしたがって説明する。
まず、本発明にかかる有機性廃棄物の処理方法に適用する連続処理装置について説明する。
【０００９】
図１は、連続処理装置の１例である外熱式単筒型ロータリーキルンＴ１を示し、大略、外筒１、内筒５、装入フード１７、水蒸気供給管１９、抽出フード２０とからなる。
【００１０】
そして、原料搬送通路である前記内筒５は固定設置された外筒１を貫通し、外筒１から突出した両外端部５ａ，５ｂ外周には環状にレール９が設けられ、その下部外周は各々基台１１に設けた２つの支持ローラ１２により支持されるとともに、この内筒５はその外周に設けたスプロケット１３に巻回されるチェーン１４をモータ１５により駆動することにより前記支持ローラ１２上を回転するようになっている。なお、前記外筒１の両端部に燃焼ガス供給口２とガス排出口３とを備えている。
【００１１】
前記装入フード１７は前記内筒５の一端部にシール装置Ｓによりシールされ、相対回転自在に装着立設されたもので、その一端上部に原料供給手段１８である原料投入口を、一端中央に先端が前記内筒５の内部に開口する水蒸気供給管１９を備えている。
【００１２】
前記抽出フード２０は、前記装入フード１７と同様、内筒５の他端部にシール装置Ｓによりシールされ、相対回転自在に装着立設され、その一端上部には発生ガス排出口２１、下部に処理物排出手段２２である複数の回転弁を備えている。
【００１３】
そして、前記外筒１および内筒５は抽出フード２０側が下方になるように所定角度傾斜して設置されている。
【００１４】
したがって、内筒５を所定回転数、たとえば、０．３ｒｐｍで回転させ、前記外筒１に設けた燃焼ガス供給口２から、たとえば、９００℃以上の高温の燃焼ガスを内筒５との間に形成された加熱室４に供給して前記内筒５を外周から加熱し、ガス排出口３から排出するとともに、前記原料投入口１８から有機性廃棄物Ｗを供給すると、有機性廃棄物Ｗは内筒５が傾斜状態で回転することと余分な空気が供給されないため、酸素濃度が３％以下の酸素不足雰囲気下で加熱されつつ移動し、やがて所定温度の状態を保持することにより炭化物となり、あるいは、たとえば、有機性廃棄物Ｗが７００℃以上（好ましくは、水性ガス反応に適した７５０℃）になる位置に、７５０℃の水蒸気を水蒸気供給管１９から供給することにより賦活物あるいは灰化物として処理物排出手段２２から取り出す。
【００１５】
また、前記有機性廃棄物Ｗは内筒５内で乾留されるため、その間に発生する可燃性ガスや水性ガス反応により生じた可燃性の水性ガスは発生ガス排出口２１から取り出され、このガスは前記燃焼ガスの原料ガスの一部として利用したり、他の原料ガスとして利用される。
【００１６】
図２は、他の連続処理装置である外熱式多筒型キルンＴ２を示し、図１と同様、概略、外筒１、内部に複数の原料搬送通路を形成するレトルト８を有する内筒５、装入フード１７と抽出フード２０とからなる。
【００１７】
前記内筒５は内部に複数の区画板６が設けられ、この区画板６に等間隔に設けた開口７（たとえば７ヶ所）に７本のレトルトがそれぞれ挿入固定されている。なお、内筒５の外筒１側の表面には適宜切欠部（図示せず）を有する略環状仕切板１０が設けられるとともに、外筒１の両端部に燃焼ガス供給口２とガス排出口３とを備えている。
【００１８】
また、前記装入フード１７と抽出フード２０は図１と同様、前記内筒５の両端部５ａ，５ｂにシール装置Ｓを介してシールされ、相対回転自在に装着立設されたものである。
【００１９】
そして、前記装入フード１７には原料供給口が外筒１の下部に向かって開口する原料供給管１８が取り付けられるとともに、先端が前記各レトルト８内に開口し、レトルト８の中心部に固定された７本の分岐支管１９ａを備えた水蒸気供給管１９が装入フード１７に設けたロータリージョイント２３にて外部水蒸気供給源に連通している。
【００２０】
また、前記レトルト８の装入フード１７側の先端には、図１では省略しているが、図４，図５に示す掻き上げ羽根８ａを備えている。
【００２１】
なお、その他の構成は、図１に示すものと同様であり、同一部分に同一符号を付して説明を省略する。
【００２２】
したがって、前記外筒１に設けた燃焼ガス供給口２から高温の燃焼ガスを供給しながら内筒５を回転し、有機性廃棄物Ｗを原料供給管１７から外筒１の底部に供給すると、外筒１の底部に堆積した原料Ｗは、内筒５の回転にもとづき下方に移動してくるレトルト８の掻き上げ羽根８ａにより当該レトルト８内に有機性廃棄物Ｗを所定量受け入れ、内筒５の回転と内筒５の傾斜とにもとづき有機性廃棄物Ｗはレトルト８内を移動し、その間に所定温度に昇温しその後保持され炭化物となり、また、前記過程において水蒸気をレトルト８内に供給して水性ガス反応により賦活物とし、あるいは、さらに多量の水蒸気を供給することにより灰化物として抽出フード２０に設けた処理物排出手段２２から取り出す。
【００２３】
【実施例１】
実験用外熱式単筒型キルン（内筒径φ３００ｍｍ、長さ１６００ｍｍ）を用い有機性廃棄物として鶏糞を処理したところ表１に示す結果を得た。
【００２４】
【表１】

Figure 0003962641
【００２５】
【実施例２】
前記実施例１と同様の外熱式単筒型キルンで有機性廃棄物として杉樹皮等の製材くずを処理したところ表２に示す結果を得た。
【００２６】
【表２】
Figure 0003962641
【００２７】
なお、実施例１，２において、有機性廃棄物Ｗの内筒あるいはキルン内の滞在時間は内筒の傾斜により調整したが、回転数を変化させてもよい。
【００２８】
前記実施例１，２から明らかなように、内筒５あるいはキルン８内で有機性廃棄物Ｗを酸素濃度３％以下の雰囲気下で加熱（乾留）するから、その加熱温度と保持時間を適宜設定することにより、有機性廃棄物Ｗを炭化物として取り出すことができ、また、７００℃以上、好ましくは、水性ガス反応を生じる温度である７５０℃以上に有機性廃棄物Ｗを加熱した状態で水蒸気を所定量供給することにより賦活物として取り出せ、さらに、前記所定時間での保持時間および／または水蒸気量を大とすることにより賦活物中の炭素をさらにガス化させて灰化物として取り出すことができる。
【００２９】
【発明の効果】
以上の説明で明らかなように、本発明の有機性廃棄物の処理方法によれば、有機性廃棄物を酸素濃度を３％以下の酸素不足雰囲気下で加熱して基本的に乾留工程を行なうものであるから、有害なダイオキシン類は発生しない。また、処理時に有機性廃棄物から発生する可燃性ガスを有効利用することができる。
【００３０】
さらに、有機性廃棄物の加熱温度とその保持時間を所定に設定することにより燃料、肥料、土壌改良材として利用できる炭化物に、処理条件としてさらに水蒸気を供給することにより脱臭用、脱色用の吸着材として利用できる賦化物に、さらに、温度および／または水蒸気量を大とすることにより配合飼料のミネラル分として利用できる灰化物とすることができる。
【００３１】
したがって、有機性廃棄物の炭化物、賦活物、灰化物の需要に合わせて１台の装置で処理することができる。
【図面の簡単な説明】
【図１】 本発明の実施に使用する外熱式単筒型ロータリーキルンの断面図。
【図２】 本発明の実施に使用する外熱式多筒型ロータリーキルンの断面図。
【図３】 図２のIII−III線端面図。
【図４】 図２における装入側キルン入口掻き上げ羽根の平面図。
【図５】 内筒の回転に基づくキルン先端の掻き上げ羽根の状態を示す図。
【符号の説明】
１〜外筒、５〜内筒、８〜キルン、１７〜装入フード、１８〜原料供給手段、１９〜水蒸気供給管、２０〜抽出フード、２１〜発生ガス排出口、２２〜処理物排出手段、Ｗ〜有機性廃棄物。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for treating organic waste such as livestock waste such as chicken manure and wooden waste such as bark.
[0002]
[Prior art]
Conventionally, as a method for treating the organic waste, a first method of converting the waste into an incinerated ash with an air ratio of 1.2 or more, and a fuel by dry distillation of the waste in an oxygen-deficient atmosphere, There is a second method of obtaining an activated substance that can be used as an adsorbent for deodorization or decolorization by adding a carbide that can be used as a fertilizer, a soil improvement material, or water vapor.
[0003]
[Problems to be solved by the invention]
However, since the processing method is fundamentally different between the first method and the second method, both methods cannot be selectively performed by one apparatus.
[0004]
And as mentioned above, there are various uses for carbides, activation products, and ashing products from organic wastes, but the demand is not always constant, so it is necessary to treat organic wastes. The problem is that at least two different processing apparatuses are required, and the equipment cost is high.
[0005]
In the first method, organic waste is incinerated by high-temperature combustion at an air ratio of 1.2 or more. In this case, since there is a risk that harmful dioxins are generated, the generation of dioxins is suppressed. There is a need to increase the equipment.
[0006]
The present invention was made in order to solve the above-mentioned problems.By using the same apparatus and appropriately selecting the treatment conditions, the organic waste can be converted into a carbide without generating dioxins. It aims at providing the processing method of the organic waste which can be taken out as either an activation thing or an ashing thing.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an outer cylinder, and one or more raw material conveying passages that are located in the outer cylinder, project both ends outwardly of the outer cylinder, and rotate by rotation driving means. An inner cylinder provided in a direction, an inner cylinder heating means formed between the outer cylinder and the inner cylinder, and attached to one end of the inner cylinder so as to be relatively rotatable, and organic waste is placed in a raw material transport passage of the inner cylinder A raw material supply means for supplying, a charging hood provided with a water vapor supply pipe projecting at one end into the raw material transport passage, and attached to the other end of the inner cylinder so as to be relatively rotatable, from the raw material transport passage; It consists of a discharge means for discharging the processed material and an extraction hood provided with a generated gas discharge port. In the externally heated rotary kiln The oxygen concentration in the raw material transfer passage is 3% or less, and the raw material charged from the raw material supply means is heated to a predetermined temperature in the raw material transfer passage and then held for a predetermined time in the carbide. The raw material is heated to a predetermined temperature of 700 ° C. or higher and held for a predetermined time, and during that time, steam is supplied into the raw material transport passage, and the raw material is heated to 700 ° C. or higher and the active material is held. By increasing the amount of time and / or the amount of steam supplied, the ashed product is selectively taken out from the discharge means as any one of the processed products.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
First, the continuous processing apparatus applied to the organic waste processing method according to the present invention will be described.
[0009]
Figure 1 shows an externally heated single cylinder type rotary kiln T 1 is an example of a continuous processing apparatus, generally, consists of the outer cylinder 1, inner cylinder 5, charging hood 17, the steam supply pipe 19, extraction hood 20. .
[0010]
The inner cylinder 5 serving as a raw material transfer passage passes through the outer cylinder 1 fixedly installed, and an annular rail 9 is provided on the outer periphery of both outer end portions 5a and 5b protruding from the outer cylinder 1, and the lower outer periphery thereof Are supported by two support rollers 12 provided on the base 11, and the inner cylinder 5 is driven by a motor 15 on a chain 14 wound around a sprocket 13 provided on the outer periphery thereof. It is designed to rotate on top. Note that a combustion gas supply port 2 and a gas discharge port 3 are provided at both ends of the outer cylinder 1.
[0011]
The charging hood 17 is sealed at one end portion of the inner cylinder 5 by a sealing device S and is installed upright so as to be relatively rotatable. A raw material supply port serving as a raw material supply means 18 is provided at one upper end of the charging hood 17. And a water vapor supply pipe 19 whose tip is open to the inside of the inner cylinder 5.
[0012]
The extraction hood 20 is sealed at the other end portion of the inner cylinder 5 by a sealing device S and mounted in a relatively rotatable manner, like the charging hood 17. Are provided with a plurality of rotary valves serving as the processed material discharge means 22.
[0013]
The outer cylinder 1 and the inner cylinder 5 are installed at a predetermined angle so that the extraction hood 20 side is downward.
[0014]
Therefore, the inner cylinder 5 is rotated at a predetermined rotational speed, for example, 0.3 rpm, and high-temperature combustion gas of, for example, 900 ° C. or more is passed between the inner cylinder 5 from the combustion gas supply port 2 provided in the outer cylinder 1. When the inner cylinder 5 is heated from the outer periphery and is discharged from the gas discharge port 3 and the organic waste W is supplied from the raw material input port 18, the organic waste W is Since the inner cylinder 5 rotates in an inclined state and excess air is not supplied, it moves while being heated in an oxygen-deficient atmosphere with an oxygen concentration of 3% or less, and eventually becomes a carbide by maintaining a predetermined temperature state. Alternatively, for example, by supplying steam at 750 ° C. from the steam supply pipe 19 to a position where the organic waste W is 700 ° C. or higher (preferably 750 ° C. suitable for the water gas reaction), Removed from the process product discharge means 22 as product.
[0015]
Further, since the organic waste W is dry-distilled in the inner cylinder 5, the flammable gas generated during that time or the flammable water gas generated by the water gas reaction is taken out from the generated gas discharge port 21, and this gas Is used as a part of the raw material gas of the combustion gas or as another raw material gas.
[0016]
Figure 2 shows an externally heated multi-barrel type kiln T 2 is another continuous processing apparatus, similar to FIG. 1, the inner tube having general, the outer cylinder 1, a retort 8 forming a plurality of raw material transport path therein 5. It consists of a charging hood 17 and an extraction hood 20.
[0017]
The inner cylinder 5 has a plurality of partition plates 6 provided therein, and seven retorts are inserted and fixed in openings 7 (for example, seven locations) provided at equal intervals in the partition plate 6. A substantially annular partition plate 10 having an appropriate notch (not shown) is provided on the surface of the inner cylinder 5 on the outer cylinder 1 side, and a combustion gas supply port 2 and a gas discharge port are provided at both ends of the outer cylinder 1. 3 is provided.
[0018]
In addition, the charging hood 17 and the extraction hood 20 are sealed at both end portions 5a and 5b of the inner cylinder 5 via a sealing device S, and are installed upright so as to be relatively rotatable.
[0019]
A raw material supply pipe 18 having a raw material supply port opening toward the lower portion of the outer cylinder 1 is attached to the charging hood 17, and a tip opens into each retort 8 and is fixed to the center of the retort 8. The steam supply pipe 19 provided with the seven branched branch pipes 19 a communicates with an external steam supply source through a rotary joint 23 provided in the charging hood 17.
[0020]
Further, although not shown in FIG. 1, a scraping blade 8a shown in FIGS. 4 and 5 is provided at the tip of the retort 8 on the charging hood 17 side.
[0021]
Other configurations are the same as those shown in FIG. 1, and the same parts are denoted by the same reference numerals and the description thereof is omitted.
[0022]
Therefore, when the inner cylinder 5 is rotated while supplying high-temperature combustion gas from the combustion gas supply port 2 provided in the outer cylinder 1, and the organic waste W is supplied from the raw material supply pipe 17 to the bottom of the outer cylinder 1, The raw material W deposited on the bottom of the outer cylinder 1 receives a predetermined amount of organic waste W in the retort 8 by the scraping blades 8a of the retort 8 that moves downward as the inner cylinder 5 rotates. The organic waste W moves in the retort 8 based on the rotation of 5 and the inclination of the inner cylinder 5, during which the temperature rises to a predetermined temperature and is then retained and becomes carbide. In the above process, water vapor is recirculated into the retort 8. It is supplied to be activated by a water gas reaction, or it is taken out from the treated product discharge means 22 provided in the extraction hood 20 as an ash by supplying a larger amount of water vapor.
[0023]
[Example 1]
When the chicken manure was treated as an organic waste using an experimental external heat type single cylinder kiln (inner cylinder diameter φ300 mm, length 1600 mm), the results shown in Table 1 were obtained.
[0024]
[Table 1]
Figure 0003962641
[0025]
[Example 2]
When the waste wood such as cedar bark was treated as an organic waste in an external heat type single cylinder kiln similar to Example 1, the results shown in Table 2 were obtained.
[0026]
[Table 2]
Figure 0003962641
[0027]
In Examples 1 and 2, the residence time of the organic waste W in the inner cylinder or kiln was adjusted by the inclination of the inner cylinder, but the rotational speed may be changed.
[0028]
As is clear from Examples 1 and 2, since the organic waste W is heated (dry distillation) in an atmosphere having an oxygen concentration of 3% or less in the inner cylinder 5 or the kiln 8, the heating temperature and holding time are appropriately set. By setting the organic waste W, the organic waste W can be taken out as a carbide, and the water vapor is heated in a state where the organic waste W is heated to 700 ° C. or higher, preferably 750 ° C. or higher, which is a temperature causing a water gas reaction. Can be taken out as an activated product by supplying a predetermined amount, and further, by increasing the holding time and / or the amount of water vapor in the predetermined time, the carbon in the activated product can be further gasified and taken out as an ash product. .
[0029]
【The invention's effect】
As is apparent from the above description, according to the organic waste processing method of the present invention, the organic waste is basically heated in an oxygen-deficient atmosphere having an oxygen concentration of 3% or less to perform the dry distillation process. Therefore, harmful dioxins are not generated. In addition, combustible gas generated from organic waste during processing can be effectively used.
[0030]
In addition, by setting the heating temperature of organic waste and its retention time to a predetermined level, carbon dioxide that can be used as fuel, fertilizer, and soil conditioner is further supplied with water vapor as a treatment condition, and adsorbed for deodorization and decolorization. By further increasing the temperature and / or the amount of water vapor, it is possible to obtain an ash that can be used as a mineral content of the mixed feed.
[0031]
Therefore, it can process with one apparatus according to the demand of the carbide | carbonized_material of organic waste, an activation material, and an ash.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an externally heated single-cylinder rotary kiln used in the practice of the present invention.
FIG. 2 is a cross-sectional view of an externally heated multi-cylinder rotary kiln used in the practice of the present invention.
FIG. 3 is an end view taken along line III-III in FIG. 2;
4 is a plan view of a loading-side kiln inlet scooping blade in FIG. 2. FIG.
FIG. 5 is a view showing a state of a scraping blade at the tip of the kiln based on rotation of an inner cylinder.
[Explanation of symbols]
1 to outer cylinder, 5 to inner cylinder, 8 to kiln, 17 to charging hood, 18 to raw material supply means, 19 to steam supply pipe, 20 to extraction hood, 21 to generated gas discharge port, 22 to processed material discharge means , W ~ organic waste.

Claims (1)

外筒と、外筒内に位置し両端を前記外筒外方に突出し、回転駆動手段により回転する内部に１以上の貫通する原料搬送通路を軸方向に備えた内筒と、前記外筒と内筒間に形成した内筒加熱手段と、前記内筒の一端に相対回転可能に取り付けられ、前記内筒の原料搬送通路に有機性廃棄物を供給する原料供給手段を備えるとともに、前記原料搬送通路内に一端が突出する水蒸気供給管を備えた装入フードと、前記内筒の他端に相対回転可能に取り付けられ、前記原料搬送通路からの処理物を排出する排出手段と発生ガス排出口とを備えた抽出フードとで構成し、原料供給手段から投入された原料を内筒の回転により原料搬送通路内を移動させ処理物を排出手段から排出する外熱式ロータリーキルンにおいて、
前記原料搬送通路内の酸素濃度を３％以下の酸素不足雰囲気とし、前記原料供給手段から投入される原料を前記原料搬送通路内で所定温度に昇温したのち所定時間保持することにより炭化物に、原料を７００℃以上の所定温度に昇温したのち所定時間保持し、その間に水蒸気を原料搬送通路内に供給して賦活物に、原料を７００℃以上に昇温したのち前記賦活物に対する保持時間および／または水蒸気供給量を大とすることにより灰化物に、選択的に前記いずれかの処理物として前記排出手段から取り出すことを特徴とする有機性廃棄物の処理方法。An outer cylinder, an inner cylinder that is located in the outer cylinder, projects both ends outwardly of the outer cylinder, and is provided with one or more raw material conveying passages in the axial direction that are rotated by rotation driving means; and the outer cylinder; An inner cylinder heating means formed between the inner cylinders, and a raw material supply means which is attached to one end of the inner cylinder so as to be relatively rotatable and supplies organic waste to a raw material conveyance path of the inner cylinder, and the raw material conveyance A charging hood provided with a water vapor supply pipe projecting at one end into the passage, a discharge means attached to the other end of the inner cylinder so as to be relatively rotatable, and a discharge means and a generated gas discharge port for discharging the processed material from the raw material transfer passage In an externally heated rotary kiln in which the raw material input from the raw material supply means is moved in the raw material transport passage by rotation of the inner cylinder and the processed product is discharged from the discharge means.
By setting the oxygen concentration in the raw material transport passage to an oxygen-deficient atmosphere of 3% or less, the raw material charged from the raw material supply means is heated to a predetermined temperature in the raw material transport passage, and then held for a predetermined time to the carbide. The temperature of the raw material is raised to a predetermined temperature of 700 ° C. or higher and held for a predetermined time, and during that time, steam is supplied into the raw material conveyance passage to activate the raw material. A method for treating organic waste, characterized in that, by increasing the amount of steam supplied, the ash is selectively taken out from the discharge means as any one of the treated products.
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