JP4803973B2 - Continuous carbonization method and apparatus - Google Patents

Continuous carbonization method and apparatus Download PDF

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JP4803973B2
JP4803973B2 JP2004175988A JP2004175988A JP4803973B2 JP 4803973 B2 JP4803973 B2 JP 4803973B2 JP 2004175988 A JP2004175988 A JP 2004175988A JP 2004175988 A JP2004175988 A JP 2004175988A JP 4803973 B2 JP4803973 B2 JP 4803973B2
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晃一 佐藤
哲晃 佐藤
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株式会社エスケーテック
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00Other processes not covered before; Features of destructive distillation processes in general
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/02Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel

Description

本発明は2重筒構造を有する回転炉を用いて原料を炭化させるための方法及び装置に関するものである。   The present invention relates to a method and an apparatus for carbonizing a raw material using a rotary furnace having a double cylinder structure.

可燃物の炭化処理を連続的に行うことのできる装置として、実開昭50−101475号のものがあり、同号のものは、内面に螺旋翼を設けた内外二重円筒からなる回転胴の、内筒の一端にバーナーを臨ませて所定温度に予熱し、内筒の前段にて加熱脱水し、後段にて燻焼炭化すると共に、外筒内を逆流する間に徐冷して連続的に取り出すことを可能にしたものである。しかし、このような装置では、外筒内を螺旋翼によって送られる間に常温空気と接触して徐冷する、というものであるので、燃焼状態にある内筒の熱の影響を受けることになり、所望温度まで低下させるためには長大な冷却区間が必要となる。   As a device capable of continuously performing the carbonization treatment of the combustible material, there is a device disclosed in Japanese Utility Model Laid-Open No. 50-101475, which has a rotating cylinder composed of an inner and outer double cylinder having spiral blades on the inner surface. , With a burner facing one end of the inner cylinder, preheated to a predetermined temperature, dehydrated by heating at the front stage of the inner cylinder, calcined and charred at the rear stage, and gradually cooled while flowing backward in the outer cylinder It is possible to take out. However, in such an apparatus, since the inside of the outer cylinder is brought into contact with normal temperature air and gradually cooled while being sent by the spiral blade, it is affected by the heat of the inner cylinder in the combustion state. In order to lower the temperature to the desired temperature, a long cooling section is required.

そのため、本件出願人は、より狭い設置面積を必要とするだけであるにも拘らず、より高い熱効率で原料の炭化を行える方法及び装置を開発した(特開平10-279949号、特許第3021387号)。同号の発明は、内筒、外筒間の空気の供給を遮断した空間にて燃焼を鎮火させ、冷却する過程を経るものであり、そのための通気遮断弁手段を外筒に設けている。この結果酸素供給が断たれるので鎮火状態になるのが早く、前記のもののように長大な冷却区間は必要とされないが、同号の発明を木材のチップに適用した場合には、消火が十分ではないという指摘を受けることがあった。   Therefore, the present applicant has developed a method and an apparatus capable of carbonizing a raw material with higher thermal efficiency even though only a smaller installation area is required (Japanese Patent Laid-Open No. 10-279949, Japanese Patent No. 3031387). ). The invention of the same number goes through a process of quenching and cooling the combustion in a space in which the supply of air between the inner cylinder and the outer cylinder is shut off, and a ventilation shut-off valve means for this purpose is provided in the outer cylinder. As a result, the supply of oxygen is cut off so that the fire is extinguished quickly, and a long cooling section like the above is not required. However, when the invention of the same number is applied to wood chips, fire extinguishing is sufficient. It was pointed out that it was not.

即ち、木造家屋を解体したときに発生する廃木材、或いは間伐材、流木等を破砕、粉砕して木材チップとし、これを燻焼して炭化処理を行う場合、例えば枝の節や根などに当たる部分については燃焼したチップが燠になっていると消え切らずに機外へ排出されることがある、という問題を生じる。消え残った燠は、機外へ排出後空気に触れると燃え上が
り、それが混じっている炭化物を燃焼させることになるのみならず危険でもある。また消え残りを生ずることはまれであるが何時発生するかは分からないため、必要以上に長い時間通気を遮断することになり、工程時間が延引するという問題があった。
That is, when waste wood generated when a wooden house is demolished, or thinned wood, driftwood, etc. is crushed and crushed into wood chips, and this is fired and carbonized, it hits the nodes and roots of branches, for example As for the portion, if the burned chip is in a habit, it may be discharged out of the machine without disappearing. The remaining soot burns when exposed to air after being discharged out of the machine, which not only burns the mixed carbide, but is also dangerous. In addition, although it is rare that the disappearance occurs, it is not known when it occurs, so there is a problem that the ventilation is interrupted for a longer time than necessary, and the process time is prolonged.

実開昭50−101475号Japanese Utility Model Sho 50-101475 特開平10−279949号JP-A-10-279949

本発明は前記の点に着目してなされたもので、その解決すべき課題は、木材チップ類を連続炭化する方法及び装置において、炭化物の消火を確実に行うとともに、その消火の工程を経て活性炭を製造することである。   The present invention has been made paying attention to the above points, and the problem to be solved is that in the method and apparatus for continuously carbonizing wood chips, the carbide is surely extinguished and the activated carbon is passed through the extinguishing process. Is to manufacture.

前記の課題を解決するため本発明は、内筒と外筒から成る2重筒構造を有する回転炉に、内筒の一端側から原料を供給し、内筒の他端側にて原料に着火するとともに燃焼を持続させ、内筒の他端側から外筒を経て外部へ到るほぼ一定の経路に沿って原料を移動させ、内筒に供給された原料が燃焼炎にさらされるまでの間に余熱によって原料を乾燥させ、そののち内筒、外筒間の空気の供給を遮断した空間にて燃焼を鎮火させる過程を連続的に実施して炭化物を得るものであり、さらに得られた炭化物に水を供給し、加熱蒸気を発生させ、その加熱蒸気で賦活処理することによって賦活工程を実施して活性炭を製造し、また炭化物を窒素ガスにより消火するという手段を講じたものである。
In order to solve the above-mentioned problems, the present invention supplies a raw material from one end side of an inner cylinder to a rotary furnace having a double cylinder structure consisting of an inner cylinder and an outer cylinder, and ignites the raw material at the other end side of the inner cylinder. The combustion is continued and the raw material is moved along a substantially constant path from the other end side of the inner cylinder to the outside through the outer cylinder until the raw material supplied to the inner cylinder is exposed to the combustion flame. The material is dried by residual heat, and then the process of quenching combustion is continuously performed in a space where the supply of air between the inner cylinder and the outer cylinder is shut off to obtain carbide, and the obtained carbide Water is generated , heated steam is generated, activated treatment is performed with the heated steam, an activation process is performed to produce activated carbon, and the carbide is extinguished with nitrogen gas.

上記の連続炭化方法は、内筒及び外筒から成る2重筒構造を有し、かつ筒軸周りに回転可能な回転炉と、回転炉内へ原料を導入する導入手段と、回転炉にて炭化した炭化物を導出する導出手段を具備しており、導入手段により内筒の一端側に導入された原料が内筒の他端側にて燃焼器により燃焼しながら移動して外筒内へ移り、さらに外筒内にて鎮火するように外筒内への通気を遮断する弁手段を、回転炉から炭化物を取り出す外筒の端部に設けた導出手段に設け、炭化物に対して賦活工程を実施するための賦活部として、炭化物を密閉的に搬送する過程において水を噴射するノズルを導出手段の前段に設け、窒素ガスを供給するノズルを導出手段に具備したことを特徴とする連続炭化装置によって実施することが望ましい。

The continuous carbonization method has a double cylinder structure composed of an inner cylinder and an outer cylinder, and can rotate around a cylinder axis, an introduction means for introducing a raw material into the rotary furnace, and a rotary furnace and it comprises a deriving means for deriving a carbonized carbonized product moves while burned by the combustor starting materials introduced into one end of the inner tube at the other end of the inner cylinder by introducing means to the outer cylinder The valve means for shutting off the ventilation into the outer cylinder so as to quench the fire in the outer cylinder is provided in the lead-out means provided at the end of the outer cylinder to take out the carbide from the rotary furnace , and the activation process for the carbide As an activating part for carrying out the above, continuous carbonization characterized in that a nozzle for injecting water in the process of hermetically transporting the carbide is provided in front of the deriving means, and a nozzle for supplying nitrogen gas is provided in the deriving means. It is desirable to implement by an apparatus.

本発明に係る連続炭化方法及びその実施のための装置は、2重筒構造を有する回転炉を用いて、そこへ供給される原料を炭化させるためのものである。原料としてはいわゆる木材チップを対象とし、枝打ち等によって発生した木材、流木その他あらゆる木材を含み、これらを粉砕、破砕した形態で供給される。故に、おがくずやその他の木材加工によって発生したものも含まれる。   The continuous carbonization method and the apparatus for implementing the same according to the present invention are for carbonizing a raw material supplied thereto using a rotary furnace having a double cylinder structure. The raw material is a so-called wood chip, and includes wood produced by pruning, driftwood, and any other wood, and these are supplied in a crushed and crushed form. Therefore, it includes those generated by sawdust and other wood processing.

本発明では、炭化物に水を供給することにより賦活工程を実施するものであり、この工程により炭化物を賦活し、活性炭を製造することができ、また、消火の徹底も図られる。一般的な活性炭の製造では、有機物を炭化し、炭化物を炭化装置から一旦取り出して、別の賦活炉に投入し、加熱し、空気を遮断して、蒸気を吹き込む方法が取られる。そのため従来は炭化炉と賦活炉の2種類の装置が必要であり、工程も炭化物の出し入れ分だけ余計にかかり、時間とコスト面に無駄があったということになる。しかし、本発明では、炭化物に水を噴霧し、加熱蒸気を発生させ、その加熱蒸気で処理することによって賦活工程が実施され、この際に、活性炭を製造できることになる。   In this invention, an activation process is implemented by supplying water to a carbide | carbonized_material, a carbide | carbonized_material can be activated and an activated carbon can be manufactured by this process, and thorough fire extinguishing is also aimed at. In general production of activated carbon, there is a method in which organic matter is carbonized, the carbide is once taken out from the carbonization apparatus, put into another activation furnace, heated, air is shut off, and steam is blown. For this reason, conventionally, two types of apparatuses, a carbonization furnace and an activation furnace, are required, and the process takes an extra portion of the carbide in and out, resulting in wasted time and cost. However, in the present invention, the activation step is carried out by spraying water on the carbide, generating heated steam, and treating with the heated steam, and at this time, activated carbon can be produced.

本発明において、上記のような原料を燻焼炭化させて得た炭化物は不活性ガス雰囲気中において消火する。炭化物は外筒から取り出されるまでの間に、通気を遮断されている外筒内の移動中にほぼ百パーセントに近い割合で鎮火した状態にあるが、対象が木材であ
り、節や根など一部は消え残っている可能性がある。そこで本発明では、炭化物を不活性ガスによって消火しておくために不活性ガス雰囲気中を通すものである。従って、本発明では、消火工程を経る積極的消火により確実にガス消火する点に意義がある。消火性ガスとしては窒素ガス、二酸化炭素などを使用することができ、これを低温で供給することにより活性炭の冷却を促進することができる。
In the present invention, the carbide obtained by calcination of the above raw materials is extinguished in an inert gas atmosphere. While the carbide is being removed from the outer cylinder, it has been extinguished at a rate close to 100% during the movement in the outer cylinder where ventilation is blocked. The department may remain gone. Therefore, in the present invention, the carbide is passed through an inert gas atmosphere in order to extinguish the fire with the inert gas. Therefore, in the present invention, there is a significance in surely extinguishing gas by active fire extinguishing through the fire extinguishing process. Nitrogen gas, carbon dioxide, or the like can be used as the fire extinguishing gas, and cooling of the activated carbon can be promoted by supplying it at a low temperature.

本発明は以上の如く構成されかつ作用するものであるから、木材チップ類から成る原料を連続炭化する方法及び装置において、窒素ガス雰囲気中に炭化物を通すことにより消火を確実に行い、また炭化物に水を供給することにより炭化物を賦活して活性炭を製造するとともに、消火をさらに完全なものとすることができるという効果を奏する。   Since the present invention is configured and operates as described above, in the method and apparatus for continuously carbonizing a raw material made of wood chips, fire is reliably extinguished by passing the carbide through a nitrogen gas atmosphere. By supplying water, activated carbon is produced by producing activated carbon, and fire extinguishing can be further completed.

本発明に係る連続炭化方法を実施するに当たり、木材チップから成る原料は、回転炉を構成する、内筒から外筒を経て、回転炉の外部へ至る、ほぼ一定の経路に沿って移動させる。内筒内に原料を供給し、そこから外筒へ移行させることで、内筒と外筒の2重筒構造を有効に利用する。即ち、内筒にて原料に燃焼を生じさせ、燃焼物が外筒へ移行したの
ち、内筒、外筒間の空気の供給を遮断し、外筒内にて燃焼物の燃焼を鎮火させ、炭化物を生成する。炭化物は上記外筒内を移動する間に徐々に冷却される。
In carrying out the continuous carbonization method according to the present invention, the raw material consisting of wood chips is moved along a substantially constant path that constitutes the rotary furnace, from the inner cylinder to the outer cylinder, and to the outside of the rotary furnace. The double cylinder structure of the inner cylinder and the outer cylinder is effectively used by supplying the raw material into the inner cylinder and shifting from there to the outer cylinder. That is, the raw material is combusted in the inner cylinder, and after the combustion product moves to the outer cylinder, the supply of air between the inner cylinder and the outer cylinder is shut off, and the combustion of the combustion substance is extinguished in the outer cylinder, Carbide is produced. The carbide is gradually cooled while moving in the outer cylinder.

2重筒構造を有する回転炉は、回転によって、筒の軸方向へ原料及びその燃焼物(炭化物)を移動させることができるものを使用する。このような回転炉としては、例えば円筒状の内筒及び外筒の内面にらせん状に羽根状部材を設け、炉の回転力が原料等の推進力になる構造のものを用いることができる。原料に対しては燃焼炎を直接作用させる方法が熱効率の上から最適であり、かつまた燃焼炎にさらされるまでの間に、余熱によって原料を十分に乾燥させることとなる。このようにして木材チップから成る原料は燃焼を生じながら内筒を一端から他端に向かって移動し、外筒へ移行する。内筒、外筒間は空気の供給が遮断されており、そのため燃焼は次第に鎮火に向かう。   A rotary furnace having a double cylinder structure uses a furnace that can move a raw material and its combustion products (carbides) in the axial direction of the cylinder by rotation. As such a rotary furnace, for example, a structure in which a blade-like member is provided in a spiral shape on the inner surfaces of a cylindrical inner cylinder and an outer cylinder, and the rotational force of the furnace is a propulsive force for a raw material or the like can be used. A method in which a combustion flame directly acts on the raw material is optimal from the viewpoint of thermal efficiency, and the raw material is sufficiently dried by residual heat until it is exposed to the combustion flame. In this way, the raw material made of wood chips moves through the inner cylinder from one end to the other while burning, and moves to the outer cylinder. The supply of air is cut off between the inner cylinder and the outer cylinder, so that combustion gradually goes to fire suppression.

かくして鎮火状態となった炭化物は、窒素ガスにより積極消火する工程に入る。また窒素ガス雰囲気の通過により消火した炭化物に水を噴射し、それによって加熱蒸気処理による賦活工程を実施する。それとともに消火の徹底を図り、未消火の可能性を根絶する。賦活工程を経ることによって、木材チップを原料とする炭化物は活性炭に変化する。水を噴射する工程と、窒素ガスを供給する工程とは、どちらを先にしても良いし、同時並行的に実施しても良い。   The carbide thus put into a fire extinguishing state enters a process of actively extinguishing with nitrogen gas. Moreover, water is injected to the charcoal extinguished by the passage of the nitrogen gas atmosphere, thereby carrying out an activation process by heating steam treatment. At the same time, thorough fire extinguishing will be eradicated to eliminate the possibility of non-extinguishing. By going through the activation process, the carbide from the wood chip is changed to activated carbon. Either the step of jetting water or the step of supplying nitrogen gas may be performed first or may be performed in parallel.

消火工程及び賦活工程は、実施例に示したように、回転筒の内部にある炭化物に対して実施する方法と、回転筒の外部に、スクリューコンベアのような密閉空間を設けて実施する方法の、二つの方法で実施することができる。外筒は空気の供給が遮断されており、その内部空間に水を供給し、さらに窒素等のガスを供給することを実施すること、及び供給をコントロールすることは容易に実施し得る。   As shown in the examples, the fire extinguishing step and the activation step are a method of performing the carbide on the inside of the rotating cylinder, and a method of performing the method by providing a sealed space such as a screw conveyor outside the rotating cylinder. Can be implemented in two ways. The supply of air to the outer cylinder is interrupted, and it is easy to supply water to the internal space, further supply a gas such as nitrogen, and control the supply.

このような連続炭化方法は、図1に示す連続炭化装置によって実施することができる。原料を燃焼させる回転炉10は内筒11と外筒12とからなる2重筒構造を有する。内筒11の一端は、原料の導入のための部分になっており、そのためのホッパー13、内筒内へ原料を送り込むフィーダー14等からなる導入手段15が設けられる。フィーダー14としてはスクリューコンベア型の定量型フィーダーを使用することができる。回転炉10はほぼ水平状態に、基台16に支持ローラ17にて支持することができ、その状態で円筒軸の軸周りに回転可能である。18はローラ17で支える外輪を示す。例示の回転炉10は、導入側で内筒11を外筒12よりも長く形成し、内筒端には端部外筐19を設け、短い外筒12の端部には中間部外筐21を設けている。   Such a continuous carbonization method can be implemented by the continuous carbonization apparatus shown in FIG. The rotary furnace 10 that combusts the raw material has a double cylinder structure including an inner cylinder 11 and an outer cylinder 12. One end of the inner cylinder 11 is a portion for introducing a raw material, and an introduction means 15 including a hopper 13 for that purpose, a feeder 14 for feeding the raw material into the inner cylinder, and the like are provided. As the feeder 14, a screw conveyor type quantitative feeder can be used. The rotary furnace 10 can be supported by the support roller 17 on the base 16 in a substantially horizontal state, and can rotate around the axis of the cylindrical shaft in that state. Reference numeral 18 denotes an outer ring supported by the roller 17. In the illustrated rotary furnace 10, the inner cylinder 11 is formed longer than the outer cylinder 12 on the introduction side, an end outer casing 19 is provided at the inner cylinder end, and an intermediate outer casing 21 is provided at the end of the shorter outer cylinder 12. Is provided.

回転炉10の他端部には、燃焼器20を、内筒11の他端開口内へ向けて設ける。例示の場合、内筒11と外筒12の端部は頭部外筐22内に位置し、燃焼器20は頭部外筐22に軸心位置で取り付けている。図1、図7等参照。内筒11及び外筒12の各端部を囲む外筐19、21、22は回転筒内を密閉状態に保つシールの役目も果たす。回転炉10を構成する内筒11と外筒12は一体回転可能に形成し、外筒12の外周に設けた、チェーンリングのような動力伝達用環状部23とモータなどの駆動手段24の駆動軸とをチェーンのような伝動手段25によって結合し、回転させることができる。図2、図3参照。   A combustor 20 is provided at the other end of the rotary furnace 10 toward the other end opening of the inner cylinder 11. In the illustrated example, the ends of the inner cylinder 11 and the outer cylinder 12 are located in the head outer casing 22, and the combustor 20 is attached to the head outer casing 22 at the axial center position. See FIG. 1, FIG. The outer casings 19, 21, and 22 surrounding the ends of the inner cylinder 11 and the outer cylinder 12 also serve as a seal for keeping the inside of the rotating cylinder in a sealed state. The inner cylinder 11 and the outer cylinder 12 constituting the rotary furnace 10 are formed so as to be integrally rotatable, and are driven on a power transmission annular portion 23 such as a chain ring and a driving means 24 such as a motor provided on the outer periphery of the outer cylinder 12. The shaft can be coupled and rotated by transmission means 25 such as a chain. See FIG. 2 and FIG.

回転炉10を構成する内筒11は、導入手段15から投入される原料をほぼ軸方向へ移動させるための羽根26を内側に多数有する。羽根26は、内筒11の回転によりその内周面によって受ける周方向移動力を軸方向の移動力に変える向きに傾斜した形状、構造又は配置を有する。例えば図3〜図5に詳細に示した如く、導入側の羽根26の傾斜は他よりも強く、かつ羽根26の高さもより高くして速度や推進力を変えることができる。原料を内筒11から外筒へ移行させるために内筒11の先端部に窓状その他の通過部27が設けられている。外筒12へ移行した原料は逆方向へ移動させるために、前記と逆向きに傾斜した羽根28によって搬送される。この羽根28は外筒12の内面に設けることができる。図3〜図5参照。例示の傾斜の場合先端からみて右回転のとき原料を前進させる構成である。   The inner cylinder 11 constituting the rotary furnace 10 has a large number of blades 26 on the inner side for moving the raw material charged from the introduction means 15 in the substantially axial direction. The blades 26 have a shape, a structure, or an arrangement that is inclined in a direction to change the circumferential movement force received by the inner circumferential surface thereof by the rotation of the inner cylinder 11 into the axial movement force. For example, as shown in detail in FIGS. 3 to 5, the inclination of the introduction-side blades 26 is stronger than the others, and the height of the blades 26 can be made higher to change the speed and propulsive force. In order to transfer the raw material from the inner cylinder 11 to the outer cylinder, a window-like or other passage portion 27 is provided at the tip of the inner cylinder 11. In order to move the raw material transferred to the outer cylinder 12 in the reverse direction, the raw material is conveyed by the blades 28 inclined in the reverse direction. The blades 28 can be provided on the inner surface of the outer cylinder 12. See FIGS. In the case of the illustrated inclination, it is a configuration in which the raw material is advanced when the right rotation is seen from the tip.

燃焼器20は回転炉10の他端部に設けられる。軸心よりやや下がった位置の燃焼器20の火炎は原料に対する着火、燃焼を容易にする。29はのぞき窓を示す。内筒11における燃焼によって生成されたガスの排出のために、排気部30を設ける。これは端部外筐19を囲み、かつ内筒11の内部空間には通口31にて一端で通じ、末端の煙突32からガスを大気放出する。図6参照。   The combustor 20 is provided at the other end of the rotary furnace 10. The flame of the combustor 20 at a position slightly lower than the axial center facilitates ignition and combustion of the raw material. Reference numeral 29 denotes an inspection window. An exhaust part 30 is provided for discharging gas generated by combustion in the inner cylinder 11. This surrounds the end outer casing 19 and communicates with the inner space of the inner cylinder 11 at one end through a passage 31 to release the gas from the chimney 32 at the end. See FIG.

燃焼した原料の鎮火による炭火及び炭化物の冷却のために、外筒12と内筒11とで囲まれた空間Sへの通気を遮断するための手段を導出手段37の適当な箇所に設ける。例示の場合外筐21の下部にシューター36を設け、炭化物を取り出すため導出手段37をシューター36に続いて設けている。図5参照。導出手段37は、炭化物を取り出すために回転炉の内部の空間Sへの通気を遮断する手段として2段階のダンパー38、38を設けたシュート42を具備しており、ダンパー38、38のどちらか一方を閉じておくことにより、炭化物の連続的な取り出しを可能にしている。39はスクリューコンベアを示す。   Means for blocking the ventilation to the space S surrounded by the outer cylinder 12 and the inner cylinder 11 is provided at an appropriate location of the lead-out means 37 for the purpose of charcoal fire and the cooling of the carbide by quenching the burned raw material. In the illustrated case, a shooter 36 is provided at the lower part of the outer casing 21, and a derivation means 37 is provided following the shooter 36 for taking out carbides. See FIG. The lead-out means 37 includes a chute 42 provided with two-stage dampers 38 and 38 as means for blocking ventilation to the space S inside the rotary furnace in order to take out carbides. By keeping one side closed, the carbide can be continuously taken out. Reference numeral 39 denotes a screw conveyor.

炭化物に対して賦活工程を実施するための賦活部40が、導出手段37の前段に設けられている(図5及び図9参照)。賦活部40は外筒12と内筒11で囲まれた空間部に設定されており、賦活のために炭化物に対して水を噴霧するノズル41がシューター36部に設置されている。   An activation part 40 for performing the activation process on the carbide is provided in the front stage of the derivation means 37 (see FIGS. 5 and 9). The activation part 40 is set in a space part surrounded by the outer cylinder 12 and the inner cylinder 11, and a nozzle 41 for spraying water on the carbide for activation is installed in the shooter 36 part.

消火部43は、スクリューコンベア39に関連して設けられており、具体的には搬送される炭化物に窒素ガスを噴射するためのノズル44を複数個有している。消火部43は、ダンパー38から供給される炭化物の量に適した速度でスクリューコンベアを駆動し、その速度と窒素ガス量との兼ね合いにより消火の確実性を高めることができる。消火部43は、スクリューコンベア39の外側を囲む水冷ジャケット45を有しており、最終冷却を実施することができる。   The fire extinguishing unit 43 is provided in association with the screw conveyor 39, and specifically includes a plurality of nozzles 44 for injecting nitrogen gas onto the conveyed carbide. The fire extinguishing unit 43 can drive the screw conveyor at a speed suitable for the amount of carbide supplied from the damper 38, and can increase the certainty of fire extinguishing due to the balance between the speed and the amount of nitrogen gas. The fire extinguishing unit 43 has a water cooling jacket 45 surrounding the outside of the screw conveyor 39, and can perform final cooling.

<原料の供給>
本発明に係る連続炭化方法を上に例示したような装置を用いて実施する場合、原料Mは導入手段15から内筒の一端部に供給される。原料の導入に先だって燃焼器20を作動させて炉内を加熱し、温度上昇をセンサー等により確認する。回転炉10を回転させると原料をほぼ軸方向へ移動させることができ、内筒11内は一端部側で低温、燃焼器20が配置されている先端部側で高温の傾向にあり、原料Mは前進により燃焼ガス流Nによって加熱されながら、乾燥度を高めて行く。
<Supply of raw materials>
When the continuous carbonization method according to the present invention is carried out using an apparatus as exemplified above, the raw material M is supplied from the introducing means 15 to one end of the inner cylinder. Prior to the introduction of the raw material, the combustor 20 is operated to heat the inside of the furnace, and the temperature rise is confirmed by a sensor or the like. When the rotary furnace 10 is rotated, the raw material can be moved substantially in the axial direction. The inner cylinder 11 has a low temperature on one end side and a high temperature on the tip side where the combustor 20 is disposed. Increases the dryness while being heated by the combustion gas flow N as it advances.

<原料の燃焼>
内筒11内を前進するにつれて原料は加熱され、なかば燃焼状態になり、さらに前進すると燃焼炎に直かにさらされて燃焼する。これを図9にて略示すると、内筒11の一端部側47が乾燥過程、中間部48が燃焼・乾燥過程、先端部側49が燃焼炎にさらされての燃焼過程ということになる。故に、原料は温度センサーなどにより設置される最適の温度で燃焼し、内筒先端の通過部27から外筒12内へ連続的に移行する。外筒12内の空間Sへ移行した燃焼物は、いわば自然状態で燃焼を継続する。
<Combustion of raw materials>
The raw material is heated as it advances in the inner cylinder 11 and is in a combustion state, and when it further advances, it is directly exposed to the combustion flame and burns. When this is schematically shown in FIG. 9, the one end side 47 of the inner cylinder 11 is a drying process, the intermediate part 48 is a combustion / drying process, and the tip part 49 is a combustion process exposed to a combustion flame. Therefore, the raw material burns at the optimum temperature set by a temperature sensor or the like, and continuously moves from the passage portion 27 at the tip of the inner cylinder into the outer cylinder 12. Combustion that has moved to the space S in the outer cylinder 12 continues to burn in a natural state.

<炭化>
外筒12の空間Sは遮断弁手段35の閉止によって空気供給が断たれた状態にある。炭化物の温度は約800℃となる。このため燃焼物M′は徐々に鎮火そして炭化しながら、前記空間Sを原料とは逆方向へ移動する。その間炭化物はノズル41から噴霧された水が加熱され発生した蒸気によって賦活され、冷却し、活性炭として導出手段37から排出されることとなる。
<Carbonization>
The space S of the outer cylinder 12 is in a state where the air supply is cut off by closing the shutoff valve means 35. The temperature of the carbide is about 800 ° C. For this reason, the combustion product M ′ gradually extinguishes and carbonizes, and moves in the space S in the opposite direction to the raw material. In the meantime, the carbide is activated by the steam generated by heating the water sprayed from the nozzle 41, cooled, and discharged from the outlet means 37 as activated carbon.

なお、炭化物を得る一例をあげると、内筒11つまり燃焼室温度はおおよそ300℃〜450℃まで上昇する。本発明に係る装置を使用しても、温度設定を低くした場合には炭化ではなく、例えば湿ったおがくずを乾燥させる装置となる。   As an example of obtaining carbide, the inner cylinder 11, that is, the combustion chamber temperature rises to approximately 300 ° C to 450 ° C. Even when the apparatus according to the present invention is used, when the temperature setting is lowered, the apparatus does not carbonize, but for example damp sawdust is dried.

<消火>
導出手段37により搬送される炭化物は、消火部43に進入し、消火部43ではノズル44から窒素ガスNが低温(約5℃)で供給され、密閉空間であるスクリューコンベア39内を満たしているので、搬送される炭化物が枝の節や根などの部分で、燠が残っていたとしても、消火部43を移動する間に積極消火されることになり、かつまた水冷ジャケット45により全体が冷却され、ダンパー38、38から排出された炭化物の温度は約30〜40℃程度に下がっている。かくして製造された炭化物は、ノズル41から比表面積300〜1000m/gほどの活性炭として利用することができる。窒素ガスNは外筒内空間において炭化物を消火し、さらに排気部30の方向へ逆行する。
<Fire extinguishing>
The carbide conveyed by the derivation means 37 enters the fire extinguishing unit 43, and nitrogen gas N 2 is supplied from the nozzle 44 at a low temperature (about 5 ° C.) in the fire extinguishing unit 43 to fill the inside of the screw conveyor 39 which is a sealed space. Therefore, even if the carbide to be transported is part of the branches, roots, etc., even if soot remains, it will be actively extinguished while moving the fire extinguishing part 43, and the whole is also cooled by the water cooling jacket 45. The temperature of the carbide cooled and discharged from the dampers 38 and 38 is lowered to about 30 to 40 ° C. The carbide thus produced can be used as activated carbon having a specific surface area of about 300 to 1000 m 2 / g from the nozzle 41. Nitrogen gas N 2 extinguishes the carbide in the space inside the outer cylinder, and further goes backward in the direction of the exhaust part 30.

本発明に係る連続炭化方法の実施に直接使用する装置の実施形態の例1を示す平面図。The top view which shows Example 1 of embodiment of the apparatus directly used for implementation of the continuous carbonization method which concerns on this invention. 図1のものの正面図。The front view of the thing of FIG. 図2のIII−III線断面図。III-III sectional view taken on the line of FIG. 図2のIV−IV線断面図。IV-IV sectional view taken on the line of FIG. 図2のV−V線断面図。VV sectional view taken on the line of FIG. 図2のVI−VI線断面図。FIG. 6 is a sectional view taken along line VI-VI in FIG. 2. 図2の左側面図。The left view of FIG. 図2の右側面図。The right view of FIG. 本発明に係る方法の略図、または装置運転状態を示す説明図。The schematic of the method which concerns on this invention, or explanatory drawing which shows an apparatus operating state.

符号の説明Explanation of symbols

10 回転炉
11 内筒
12 外筒
15 導入手段
19、21、22 外筐
20 燃焼器
26、28 羽根
30 排気部
36 シューター
37 導出手段
38 遮断弁手段としてのダンパー
39 スクリューコンベア
40 賦活部
41、44 ノズル
43 消火部
DESCRIPTION OF SYMBOLS 10 Rotating furnace 11 Inner cylinder 12 Outer cylinder 15 Introduction means 19, 21, 22 Outer casing 20 Combustor 26, 28 Blade 30 Exhaust part 36 Shooter 37 Derivation means 38 Damper as shut-off valve means 39 Screw conveyor 40 Activation parts 41, 44 Nozzle 43 Fire extinguishing part

Claims (2)

内筒と外筒から成る2重筒構造を有する回転炉に、内筒の一端側から原料を供給し、内筒の他端側にて原料に着火するとともに燃焼を持続させ、内筒の他端側から外筒を経て外部へ到るほぼ一定の経路に沿って原料を移動させ、内筒に供給された原料が燃焼炎にさらされるまでの間に余熱によって原料を乾燥させ、そののち内筒、外筒間の空気の供給を遮断した空間にて燃焼を鎮火させる過程を連続的に実施して炭化物を得るものであり、さらに得られた炭化物に水を供給し、加熱蒸気を発生させ、その加熱蒸気で賦活処理することによって賦活工程を実施して活性炭を製造し、また炭化物を窒素ガスにより消火することを特徴とする連続炭化方法。 A rotary furnace having a double tube structure composed of an inner cylinder and an outer cylinder, to supply the raw material from one end of the inner cylinder, to sustain the combustion with igniting the material at the other end of the inner cylinder, the inner cylinder other The raw material is moved along an almost constant path from the end side to the outside through the outer cylinder, and the raw material is dried by residual heat until the raw material supplied to the inner cylinder is exposed to the combustion flame . Carbide is obtained by continuously performing the process of extinguishing combustion in a space where the supply of air between the cylinder and the outer cylinder is cut off, and water is supplied to the obtained carbide to generate heated steam. A continuous carbonization method characterized in that an activation process is carried out by activation treatment with the heated steam to produce activated carbon, and the carbide is extinguished with nitrogen gas. 請求項1記載の連続炭化方法の実施に直接使用する装置であって、内筒及び外筒から成る2重筒構造を有し、かつ筒軸周りに回転可能な回転炉と、回転炉内へ原料を導入する導入手段と、回転炉にて炭化した炭化物を導出する導出手段を具備しており、導入手段により内筒の一端側に導入された原料が内筒の他端側にて燃焼器により燃焼しながら移動して外筒内へ移り、さらに外筒内にて鎮火するように外筒内への通気を遮断する弁手段を、回転炉から炭化物を取り出す外筒の端部に設けた導出手段に設け、炭化物に対して賦活工程を実施するための賦活部として、炭化物を密閉的に搬送する過程において水を噴射するノズルを導出手段の前段に設け、窒素ガスを供給するノズルを導出手段に具備したことを特徴とする連続炭化装置。 An apparatus directly used for carrying out the continuous carbonization method according to claim 1 , having a double cylinder structure comprising an inner cylinder and an outer cylinder and capable of rotating around a cylinder axis, and into the rotary furnace and introducing means for introducing a material, which comprises a deriving means for deriving a carbonized product was carbonized by rotary furnace, the starting materials introduced into one end of the inner tube by introducing means at the inner cylinder and the other end side of the combustion A valve means is provided at the end of the outer cylinder that removes carbide from the rotary furnace so that it moves while burning by the vessel, moves into the outer cylinder, and further shuts off the ventilation into the outer cylinder so that the fire is extinguished in the outer cylinder. A nozzle for injecting water in the process of hermetically transporting the carbide is provided in the preceding stage of the lead-out means, and a nozzle for supplying nitrogen gas is provided in the lead-out means as an activation part for performing the activation process on the carbide. A continuous carbonization apparatus provided in the deriving means .
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