JP2000273471A - Furnace for pyrolysis - Google Patents

Furnace for pyrolysis

Info

Publication number
JP2000273471A
JP2000273471A JP11074698A JP7469899A JP2000273471A JP 2000273471 A JP2000273471 A JP 2000273471A JP 11074698 A JP11074698 A JP 11074698A JP 7469899 A JP7469899 A JP 7469899A JP 2000273471 A JP2000273471 A JP 2000273471A
Authority
JP
Japan
Prior art keywords
furnace
gas
pyrolysis
combustible gas
organic waste
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11074698A
Other languages
Japanese (ja)
Inventor
Masato Endo
Katsuhiro Yamaya
勝裕 山家
正人 遠藤
Original Assignee
Ngk Insulators Ltd
日本碍子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ngk Insulators Ltd, 日本碍子株式会社 filed Critical Ngk Insulators Ltd
Priority to JP11074698A priority Critical patent/JP2000273471A/en
Publication of JP2000273471A publication Critical patent/JP2000273471A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

PROBLEM TO BE SOLVED: To obtain a combustible gas which maintains calorific value inherent in a thermally cracked gas while conducted thermal decomposition normally as before. SOLUTION: This furnace has following mechanisms and steps: An organic waste A is fed into a furnace through a feeder 11 and moves in the direction of an outlet by heating with a cylindrical rotary furnace 1 heated from outside indirectly. In this step, the organic waste is thermally decomposed and the obtained thermally cracked gas is purged as a combustible gas B and the remained ungasified part is purged as a pyrolysis residue C from the outlet side. Steam or a combustible gas is led into a thermal decomposition zone of the cylindrical rotary furnace 1 to keep and control inner pressure positive and not to be invaded with outside air.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、有機廃棄物を加熱
して熱分解し、可燃ガスを得る熱分解炉の改良にに関す
るものであって、特に、可燃ガスの発熱量を高く維持で
きる熱分解炉に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a pyrolysis furnace for obtaining a combustible gas by heating and decomposing an organic waste to obtain a combustible gas. It relates to a decomposition furnace.

【0002】[0002]

【従来の技術】従来、廃棄物を処理する技術において、
廃棄物の持つ熱量を有効に活用することが実用化されて
いる。この目的に、間接加熱型熱分解炉が用いられてい
る。この熱分解炉では、図1に例示するように、例えば
回転筒状炉体1が用いられ、フィーダ11から処理対象
の廃棄物Aが炉内に送り込まれる。この円筒回転炉1は
空気が侵入しないよう遮断された状態に保持され、炉内
の廃棄物は外部加熱により間接的に加熱、分解され、得
られた水素、二酸化炭素、炭化水素類を主成分とする可
燃ガスBは外部に取り出される。なお、無機成分などガ
ス化しない成分は熱分解残渣Cとして取り出される。
2. Description of the Related Art Conventionally, in the technology for treating waste,
It has been put to practical use to effectively use the calories of waste. For this purpose, an indirect heating type pyrolysis furnace is used. In this pyrolysis furnace, for example, as shown in FIG. 1, for example, a rotary tubular furnace body 1 is used, and a waste A to be treated is sent from a feeder 11 into the furnace. The cylindrical rotary furnace 1 is kept in a closed state so that air does not enter, and waste in the furnace is indirectly heated and decomposed by external heating, and the obtained hydrogen, carbon dioxide, and hydrocarbons as main components are obtained. Is taken out to the outside. Components that are not gasified, such as inorganic components, are taken out as pyrolysis residues C.

【0003】この場合、この回転筒状炉体1の入口側か
ら炉圧調整ガスDが供給される。この炉圧調整ガスD
は、炉圧を、0〜+200mm水柱程度の正圧に維持し
て外部から空気が炉内に侵入するのを防止ためのもので
あり、さらに熱分解反応を熱ロス少なく行わせるため炉
内は還元雰囲気に維持し、炉内で燃焼反応が生じないよ
う酸素濃度を極力低く維持するために、不活性ガスを使
用するのが通例であり、窒素ガス単独、または窒素と炭
酸ガスの混合ガスが多く用いられている。
In this case, a furnace pressure adjusting gas D is supplied from the inlet side of the rotary tubular furnace body 1. This furnace pressure adjusting gas D
Is to maintain the furnace pressure at a positive pressure of about 0 to +200 mm water column to prevent air from entering the furnace from the outside. In order to maintain the atmosphere in a reducing atmosphere and keep the oxygen concentration as low as possible so as not to cause a combustion reaction in the furnace, it is customary to use an inert gas. Many are used.

【0004】[0004]

【発明が解決しようとする課題】かくしてこの熱分解炉
から得られる可燃ガスは、廃棄物の熱分解反応によって
発生した本来の熱分解ガスに対して窒素ガスなどの不活
性ガスが混合した状態で取り出される。その場合、不活
性ガスの濃度は、炉の気密構造にもよるが、少ない場合
で5%、多い場合で30%程度になるのが避けられな
い。このように可燃ガスは、いわば不活性ガスによって
希釈された形態となるので、単位重量当たりの発熱量と
しては、不活性ガスが含まれる分だけ利用熱量が少ない
可燃ガスになるという不具合があった。本発明はこのよ
うな問題を解決するためになされたものであり、熱分解
炉の熱分解反応を従来通り正常に行わせながら、熱分解
ガスを不活性ガスで希釈することなく、熱分解ガス本来
の発熱量を維持できる可燃ガスが得られる熱分解炉を提
供する。
Thus, the combustible gas obtained from the pyrolysis furnace is obtained by mixing an inert gas such as nitrogen gas with the original pyrolysis gas generated by the pyrolysis reaction of waste. Taken out. In this case, the concentration of the inert gas depends on the hermetic structure of the furnace, but it is inevitable that the concentration is 5% when the concentration is low and about 30% when the concentration is high. As described above, since the combustible gas is in a form diluted with an inert gas, there is a problem that the calorific value per unit weight is a combustible gas that uses a small amount of heat as much as the inert gas is included. . The present invention has been made in order to solve such a problem, and the pyrolysis reaction of the pyrolysis furnace is performed normally as usual, while the pyrolysis gas is not diluted with an inert gas, and the pyrolysis gas is not diluted. Provided is a pyrolysis furnace capable of obtaining a combustible gas capable of maintaining an original calorific value.

【0005】[0005]

【課題を解決するための手段】上記の問題は、有機廃棄
物を熱分解ゾーンにて熱分解し可燃ガスを得る間接加熱
型熱分解炉であって、その熱分解ゾーンに水蒸気または
可燃性ガスを導入し、その内圧を正圧に調整可能とした
ことを特徴とする熱分解炉により解決することができ
る。また本発明では、熱分解ゾーンに導入される前記可
燃性ガスが燃料用都市ガスである形態、または前記間接
加熱型熱分解炉により得た熱分解ガスの一部を返送した
ものである形態、あるいはその後段に配置されたガス変
換炉により得た可燃ガスの一部を返送したものである形
態などに具体化することが可能である。
An object of the present invention is to provide an indirect heating type pyrolysis furnace which pyrolyzes organic waste in a pyrolysis zone to obtain a flammable gas. And a pyrolysis furnace characterized in that the internal pressure can be adjusted to a positive pressure. Further, in the present invention, a form in which the combustible gas introduced into the pyrolysis zone is a city gas for fuel, or a form in which a part of the pyrolysis gas obtained by the indirect heating type pyrolysis furnace is returned, Alternatively, the present invention can be embodied in a form in which a part of the combustible gas obtained by a gas conversion furnace arranged at the subsequent stage is returned.

【0006】本発明によれば、炉圧調整ガスとして、後
処理で容易に除去できる水蒸気、または可燃性のガスを
応用しているので、従来の熱分解炉の構造を大幅に改造
することなく、熱分解ゾーンを適正な正圧に調整できる
から、従来と同様空気の侵入を防止しながら運転できる
うえ、得られる可燃ガスは、発熱量が殆ど低下すること
がないという利点が得られる。
According to the present invention, as the furnace pressure adjusting gas, steam or flammable gas which can be easily removed by post-treatment is applied, so that the structure of the conventional pyrolysis furnace is not significantly modified. In addition, since the pyrolysis zone can be adjusted to an appropriate positive pressure, the operation can be performed while preventing the invasion of air as in the related art, and the resulting combustible gas has an advantage that the calorific value hardly decreases.

【0007】[0007]

【発明の実施の形態】次に、本発明の熱分解炉に係る実
施形態について、図1を参照しながら説明する。図1の
断面図に例示する間接加熱型熱分解炉において、有機廃
棄物は、フィーダ11から炉内に供給される。供給され
た有機廃棄物は、外部から間接的に加熱される回転筒状
炉体1に送り込まれ、この回転筒状炉体1の回転ととも
に、加熱されながら出口方向に移動する。この過程にお
いて、有機廃棄物は熱分解される最高700℃程度の温
度に加熱され、発生した熱分解ガスは、出口側から可燃
ガスBとして、またガス化しない部分は、熱分解残渣C
として取り出される。この回転筒状炉体1内は、可燃ガ
スと不燃分とに熱分解される熱分解ゾーンを形成するの
であるが、外部から空気などの侵入がないよう閉鎖さ
れ、かつこの熱分解ゾーンの内圧を正圧に保持して、外
気の侵入を防止するようにした点は、従来と変わりはな
い。
Next, an embodiment of a pyrolysis furnace according to the present invention will be described with reference to FIG. In the indirect heating type pyrolysis furnace illustrated in the cross-sectional view of FIG. 1, organic waste is supplied from a feeder 11 into the furnace. The supplied organic waste is sent from the outside to the rotary tubular furnace 1 which is indirectly heated, and moves with heating the rotary tubular furnace 1 toward the outlet while being heated. In this process, the organic waste is heated to a temperature of about 700 ° C., which is thermally decomposed, and the generated pyrolysis gas is combustible gas B from the outlet side, and the non-gasified portion is the pyrolysis residue C.
Is taken out as The inside of the rotary tubular furnace 1 forms a pyrolysis zone where it is thermally decomposed into combustible gas and non-combustible components. Is maintained at a positive pressure to prevent the invasion of outside air, which is the same as the conventional case.

【0008】この熱分解ゾーンの内圧を正圧に保持、調
整するために、本発明では、炉圧調整ガスDとして、先
ず、水蒸気を導入するようにした点に特徴がある。この
水蒸気は、本発明の熱分解炉から得られる可燃ガスを燃
料とした後段のボイラ装置(図示せず)によって得られ
るスチームを利用すれば容易に実用化できる。また、他
のプロセスと組み合わせた場合には、そこで発生する水
蒸気を用いることもできる。
In order to maintain and adjust the internal pressure of the pyrolysis zone to a positive pressure, the present invention is characterized in that steam is first introduced as the furnace pressure adjusting gas D. This steam can be easily put into practical use by using steam obtained by a subsequent boiler device (not shown) using a combustible gas obtained from the pyrolysis furnace of the present invention as a fuel. When combined with other processes, the steam generated there can also be used.

【0009】また、得られた可燃ガスは、水蒸気を5〜
30%程度含む混合ガスとなるが、同時にタール分を含
んでいるので、これを除去するため、適宜形式のコンデ
ンサによって冷却処理が行われる。このときに、含まれ
ていた水蒸気も凝縮してタールとともに除去され、水蒸
気濃度を3〜5%程度に低下させることができるので、
水蒸気を含むための発熱容量の低下は殆ど回復すること
ができる。このように、本発明の熱分解炉は、その後段
にコンデンサとボイラ装置を併設したものとして、有機
廃棄物の持つ熱エネルギをより有効に利用できるシステ
ムとして実用化できる。
Further, the obtained combustible gas has a water vapor content of 5 to 5.
Although it becomes a mixed gas containing about 30%, it contains a tar component at the same time. Therefore, in order to remove this, a cooling process is performed by a condenser of an appropriate type. At this time, the water vapor contained is also condensed and removed together with the tar, and the water vapor concentration can be reduced to about 3 to 5%.
The decrease in heat generation capacity due to the inclusion of water vapor can be almost completely recovered. As described above, the pyrolysis furnace of the present invention can be put into practical use as a system in which the heat energy of the organic waste can be more effectively used by adding the condenser and the boiler device at the subsequent stage.

【0010】また、この水蒸気に代えて別途準備した可
燃性ガス、例えばメタンを主成分とする燃料用都市ガス
を応用することもできる。燃料用都市ガスの場合は、そ
の利用に当たって原料コストが高くなる不利益があるも
のの、既成の燃料を利用するので特別の付加装置は不要
で応用が容易であるという利点の他、得られる可燃ガス
の発熱容量が全く低下しないという利点が得られる。
In place of the water vapor, a separately prepared combustible gas, for example, a city gas for fuel containing methane as a main component can be applied. In the case of city gas for fuel, there is a disadvantage that the cost of raw materials is high when using it.However, because existing fuel is used, no special additional equipment is required and the application is easy. This has the advantage that the heat generation capacity does not decrease at all.

【0011】さらには、この熱分解ゾーンの炉圧調整用
の可燃性ガスとして、この熱分解炉から得られる可燃ガ
スの一部を返送して応用するように構成することもでき
る。また、本発明のような熱分解炉には、後段にガス変
換炉を設置することが可能なので、このガス変換炉から
得られる水素ガスと一酸化炭素ガスを主成分とする可燃
ガスの一部を返送するよう構成するのも好ましい。この
実施形態では、燃料用都市ガスを用いる場合のコスト高
の不利を解消し、むしろ従来よりもコストダウンがで
き、かつ得られる可燃ガスの発熱容量の低下を抑制でき
る利点が得られる。
Further, as the flammable gas for adjusting the furnace pressure in the pyrolysis zone, a part of the flammable gas obtained from the pyrolysis furnace may be returned and applied. Further, in a pyrolysis furnace such as the present invention, a gas conversion furnace can be installed at a later stage, so that a part of the flammable gas mainly containing hydrogen gas and carbon monoxide gas obtained from this gas conversion furnace is used. Is preferably returned. This embodiment eliminates the disadvantage of high cost in the case of using city gas for fuel, and has the advantage that the cost can be reduced more than before and the decrease in the heat generation capacity of the obtained combustible gas can be suppressed.

【0012】[0012]

【発明の効果】1 本発明の熱分解炉は、以上に説明した
ように構成されているので、熱分解炉の熱分解反応を従
来と変わることなく正常に行わせながら、炉内の熱分解
ガスを不活性ガスで希釈することなく、熱分解ガス本来
の発熱量を維持した可燃ガスを取り出すことが可能とな
り、燃料として有効に利用することがができる。また、
炉圧調整ガスとして、水蒸気や返送可燃ガスなどが利用
できコストダウンも期待できるという優れた効果があ
る。よって本発明は従来の問題点を解消した熱分解炉と
して、その工業的価値は極めて大なるものがある。
[Effects of the Invention] 1 The pyrolysis furnace of the present invention is configured as described above, so that the pyrolysis reaction of the pyrolysis furnace can be performed normally without changing the conventional pyrolysis furnace. Without diluting the gas with an inert gas, a combustible gas maintaining the original calorific value of the pyrolysis gas can be taken out, and can be effectively used as fuel. Also,
As the furnace pressure adjusting gas, there is an excellent effect that water vapor, flammable gas returned, etc. can be used, and cost reduction can be expected. Therefore, the present invention has an extremely large industrial value as a pyrolysis furnace which has solved the conventional problems.

【図面の簡単な説明】[Brief description of the drawings]

【図1】熱分解炉を説明するための要部断面図。FIG. 1 is a sectional view of a main part for explaining a pyrolysis furnace.

【符号の説明】[Explanation of symbols]

1 回転筒状炉体、11 フィーダ、A 有機廃棄物、
B 可燃ガス、C 熱分解残渣、D 炉圧調整ガス。
1 rotary cylindrical furnace body, 11 feeders, A organic waste,
B Combustible gas, C Pyrolysis residue, D Furnace pressure adjusting gas.

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 3K061 AA07 AB02 AC20 KA02 KA15 KA21 3K078 BA08 BA21 CA06 4D004 AA02 BA03 CA27 CB09 CB44 CC01 CC03  ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K061 AA07 AB02 AC20 KA02 KA15 KA21 3K078 BA08 BA21 CA06 4D004 AA02 BA03 CA27 CB09 CB44 CC01 CC03

Claims (4)

    【特許請求の範囲】[Claims]
  1. 【請求項1】有機廃棄物を熱分解ゾーンにて熱分解し可
    燃ガスを得る間接加熱型熱分解炉であって、熱分解ゾー
    ンに水蒸気または可燃性ガスを導入し、その内圧を正圧
    に調整可能としたことを特徴とする熱分解炉。
    1. An indirect heating type pyrolysis furnace for pyrolyzing organic waste in a pyrolysis zone to obtain a flammable gas, wherein steam or flammable gas is introduced into the pyrolysis zone and the internal pressure thereof is made positive. A pyrolysis furnace characterized by being adjustable.
  2. 【請求項2】熱分解ゾーンに導入される前記可燃性ガス
    が燃料用都市ガスである請求項1に記載の熱分解炉。
    2. The pyrolysis furnace according to claim 1, wherein the combustible gas introduced into the pyrolysis zone is city gas for fuel.
  3. 【請求項3】熱分解ゾーンに導入される前記可燃性ガス
    が、前記間接加熱型熱分解炉により得た熱分解ガスの一
    部を返送したものである請求項1に記載の熱分解炉。
    3. The pyrolysis furnace according to claim 1, wherein the combustible gas introduced into the pyrolysis zone is obtained by returning a part of the pyrolysis gas obtained by the indirect heating type pyrolysis furnace.
  4. 【請求項4】熱分解ゾーンに導入される前記可燃性ガス
    が、その後段に配置されたガス変換炉により得た可燃ガ
    スの一部を返送したものである請求項1に記載の熱分解
    炉。
    4. The pyrolysis furnace according to claim 1, wherein the flammable gas introduced into the pyrolysis zone is obtained by returning a part of the flammable gas obtained by a gas conversion furnace arranged at a subsequent stage. .
JP11074698A 1999-03-19 1999-03-19 Furnace for pyrolysis Pending JP2000273471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11074698A JP2000273471A (en) 1999-03-19 1999-03-19 Furnace for pyrolysis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11074698A JP2000273471A (en) 1999-03-19 1999-03-19 Furnace for pyrolysis

Publications (1)

Publication Number Publication Date
JP2000273471A true JP2000273471A (en) 2000-10-03

Family

ID=13554716

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11074698A Pending JP2000273471A (en) 1999-03-19 1999-03-19 Furnace for pyrolysis

Country Status (1)

Country Link
JP (1) JP2000273471A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007279901A (en) * 2006-04-04 2007-10-25 Yafoo Japan Corp Method for transmitting data relevant to document
JP2009051956A (en) * 2007-08-28 2009-03-12 Hakujisha:Kk Elevated temperature reduction thermochemical decomposition plant for biomass
JP2010235898A (en) * 2009-03-31 2010-10-21 Mitsui Eng & Shipbuild Co Ltd Gasification apparatus, gasification method and facility for producing ethanol
CN109114561A (en) * 2018-08-17 2019-01-01 高云桥 A kind of environmental protection and energy saving garbage combustion device
CN111349465A (en) * 2020-03-13 2020-06-30 张光波 Household garbage pyrolysis gasification power generation system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007279901A (en) * 2006-04-04 2007-10-25 Yafoo Japan Corp Method for transmitting data relevant to document
JP2009051956A (en) * 2007-08-28 2009-03-12 Hakujisha:Kk Elevated temperature reduction thermochemical decomposition plant for biomass
JP2010235898A (en) * 2009-03-31 2010-10-21 Mitsui Eng & Shipbuild Co Ltd Gasification apparatus, gasification method and facility for producing ethanol
CN109114561A (en) * 2018-08-17 2019-01-01 高云桥 A kind of environmental protection and energy saving garbage combustion device
CN111349465A (en) * 2020-03-13 2020-06-30 张光波 Household garbage pyrolysis gasification power generation system

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