JP2002003855A - Manufacturing method of carbide - Google Patents
Manufacturing method of carbideInfo
- Publication number
- JP2002003855A JP2002003855A JP2000189177A JP2000189177A JP2002003855A JP 2002003855 A JP2002003855 A JP 2002003855A JP 2000189177 A JP2000189177 A JP 2000189177A JP 2000189177 A JP2000189177 A JP 2000189177A JP 2002003855 A JP2002003855 A JP 2002003855A
- Authority
- JP
- Japan
- Prior art keywords
- carbide
- gas
- furnace
- zone
- purge gas
- 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
Links
Classifications
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として廃棄物を
原料として活性炭や土壌改良用の炭化物を製造する方法
の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for producing activated carbon and carbides for soil improvement mainly from waste materials.
【０００２】[0002]
【従来の技術】流木、ごみ、汚泥等の廃棄物の最終処分
方法としては焼却処理が一般的であるが、これらの廃棄
物をより有効に利用する方法として、炭化炉で炭化する
方法が提案されている。この方法により得られた炭化物
は活性炭として有効利用され、また原料中に無機分が多
いような場合には土壌改良材として有効利用することが
できる。2. Description of the Related Art Incineration is generally used as a final disposal method for waste such as driftwood, refuse, and sludge. As a method for more effectively utilizing such waste, a method of carbonizing in a carbonization furnace is proposed. Have been. The carbide obtained by this method can be effectively used as activated carbon, and when the raw material contains a large amount of inorganic components, it can be effectively used as a soil improving material.
【０００３】廃棄物を炭化させるには、図２に示すよう
なロータリーキルン型の炭化炉が用いられている。これ
は円筒状の炉体１を一定方向に緩やかに回転させながら
その前部の投入口２から炉内に原材料となる廃棄物を投
入し、炉体１の外周に設けられた加熱室３内でバーナー
４を燃焼させて廃棄物を間接加熱するものである。炉体
１の前部に設けられたパージガス供給口５から供給され
るパージガスによって炉内は微正圧かつ還元雰囲気に維
持され、廃棄物は燃焼することなく炭化されて後部の炭
化物取り出し口６から取り出される。なお、炭化工程に
おいて廃棄物から発生する発生ガスはパージガスととも
に、炉体１の後部上方のガス排出口７から抜き取られ、
排ガス処理装置に送られる。In order to carbonize waste, a rotary kiln type carbonization furnace as shown in FIG. 2 is used. In this method, while the cylindrical furnace body 1 is slowly rotated in a certain direction, waste materials as raw materials are charged into the furnace from the inlet 2 at the front thereof, and the heating chamber 3 provided on the outer periphery of the furnace body 1 is heated. The incinerator burns the burner 4 to indirectly heat the waste. The inside of the furnace is maintained at a slightly positive pressure and a reducing atmosphere by a purge gas supplied from a purge gas supply port 5 provided at a front portion of the furnace body 1, and the waste is carbonized without burning and is discharged from a carbide outlet 6 at a rear portion. Taken out. In addition, the generated gas generated from the waste in the carbonization process is extracted together with the purge gas from the gas outlet 7 above the rear part of the furnace body 1,
It is sent to an exhaust gas treatment device.
【０００４】このように、炉体１の前部の投入口２から
炉内に投入された廃棄物は、０．５〜２時間程度の時間
をかけて炉内を緩やかに移動しつつ、徐々に炭化されて
行く。またこの炭化工程で発生した発生ガスも、後部の
ガス排出口７に向かって炉内を緩やかに流れて行く。と
ころがこの発生ガス中には、例えば、硫化水素、アンモ
ニア、硫化カルボニル、塩化水素等のような臭気を伴う
有害ガスが含まれている場合がある。そのため、図２に
示すような従来法では、炭化物と有害ガスとが長時間に
わたり炉内で共存し、得られた炭化物に臭気が付着して
品質を低下させることがあった。また炭化物を吸着用活
性炭として利用しようとしても、既に炉内で多くの有害
ガスを吸着しているため、吸着性能が低下しているとい
った問題があった。[0004] As described above, the waste introduced into the furnace from the inlet 2 at the front of the furnace body 1 gradually moves inside the furnace over a period of about 0.5 to 2 hours while gradually moving. It is carbonized. The gas generated in the carbonization step also flows slowly in the furnace toward the gas outlet 7 at the rear. However, the generated gas may include a harmful gas having an odor, such as hydrogen sulfide, ammonia, carbonyl sulfide, and hydrogen chloride. For this reason, in the conventional method as shown in FIG. 2, the carbide and the harmful gas coexist in the furnace for a long time, and an odor may be attached to the obtained carbide to lower the quality. Further, even if an attempt is made to use carbide as activated carbon for adsorption, there has been a problem that adsorption performance has been reduced because many harmful gases have already been adsorbed in the furnace.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、廃棄物を原材料とした場合にも、臭
気がなく、また吸着性能の高い炭化物を製造することが
できる炭化物の製造方法を提供するためになされたもの
である。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a odorless and highly adsorbable carbide that can be produced even when waste is used as a raw material. It has been made to provide a manufacturing method.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決すため
になされた本発明の炭化物の製造方法は、間接加熱式ロ
ータリーキルン型炭化炉の炉体の前部から原材料を投入
し、還元雰囲気中で間接加熱して炭化させ後部から取り
出す炭化物の製造方法において、炉内を微正圧かつ還元
雰囲気に維持するパージガスを、炉体の後部から供給し
て前部に向けて流すことを特徴とするものである。な
お、原材料を流木、ごみ、汚泥等の廃棄物とすることが
でき、またパージガスとして窒素などの不活性ガス、天
然ガスなどの可燃ガス又は水蒸気を使用することができ
る。According to the present invention, there is provided a method for producing a carbide according to the present invention, in which a raw material is charged from a front portion of a furnace body of an indirectly heated rotary kiln type carbonization furnace, and the raw material is charged in a reducing atmosphere. In the method for producing carbides, which is indirectly heated and carbonized and removed from the rear part, a purge gas for maintaining the inside of the furnace at a slightly positive pressure and a reducing atmosphere is supplied from the rear part of the furnace body and flows toward the front part. Things. The raw material can be waste such as driftwood, refuse, and sludge, and an inert gas such as nitrogen, a combustible gas such as natural gas, or steam can be used as a purge gas.
【０００７】本発明では従来とは異なり、パージガス
を、炭化炉の炉体の後部から前部に向けて流すことによ
り、炭化物の移動方向とは逆向きにクロスさせる。これ
により炭化の初期段階で多量に発生する有害ガスは速や
かに炉外に排出される。また炭化物に付着した有害ガス
も炉の後部から供給される新鮮なパージガスと接触する
ことにより除去されるため、臭気のない高品位の炭化物
を得ることができる。In the present invention, unlike the prior art, the purge gas is caused to flow from the rear part to the front part of the furnace body of the carbonization furnace, so that the gas crosses in the direction opposite to the moving direction of the carbide. As a result, a large amount of harmful gas generated in the initial stage of carbonization is quickly discharged out of the furnace. Further, harmful gas adhering to the carbide is also removed by contacting with a fresh purge gas supplied from the rear part of the furnace, so that a high-quality carbide having no odor can be obtained.
【０００８】[0008]
【発明の実施の形態】以下に図１により本発明の実施形
態を説明する。図１に示す間接加熱式ロータリーキルン
型の炭化炉も図２に示した従来の炭化炉と基本的に同様
の構造を持つものであり、１は傾斜軸のまわりにゆるや
かに回転する金属製の炉体、２はその前部に設けられた
原材料の投入口、３は炉体１の外周に設けられた加熱室
である。加熱室３内には複数本のバーナー４が設けられ
ており、炉体１内を間接加熱することができる。なお、
炭化は吸熱反応であり、炉体１の前部における炭化の初
期段階においてより多量の熱を必要とするので、炉体１
の前部側のバーナー４の出力を大きくしておくことが好
ましい。炉内は４００〜７００℃、好ましくは４５０〜
６５０℃に維持される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The indirectly heated rotary kiln type carbonization furnace shown in FIG. 1 also has basically the same structure as the conventional carbonization furnace shown in FIG. 2, and 1 is a metal furnace that slowly rotates around an inclined axis. The body 2 is a raw material inlet provided at the front part thereof, and 3 is a heating chamber provided on the outer periphery of the furnace body 1. A plurality of burners 4 are provided in the heating chamber 3 so that the inside of the furnace body 1 can be indirectly heated. In addition,
Carbonization is an endothermic reaction and requires more heat in the early stages of carbonization at the front of the furnace
It is preferable to increase the output of the burner 4 on the front side. 400-700 ° C. in the furnace, preferably 450-700 ° C.
Maintained at 650 ° C.
【０００９】原材料としては有機物であればほとんどの
ものが使用できるが、この発明では流木、ごみ、汚泥等
の廃棄物を用いる。下水汚泥脱水ケーキのように無機分
を含むものであっても差し支えない。ロータリーキルン
型の炭化炉は原材料の種類や形状を問わない利点がある
が、サイズの大きい流木等は予め適宜のサイズに切断し
ておくことが好ましい。投入された廃棄物は０．５〜２
時間を掛けて炉内を緩やかに移動し、徐々に炭化されて
行く。As the raw materials, most organic materials can be used, but in the present invention, wastes such as driftwood, refuse, and sludge are used. A substance containing an inorganic component such as a sewage sludge dewatered cake may be used. The rotary kiln type carbonization furnace has an advantage regardless of the type and shape of the raw material, but it is preferable to cut a large-sized driftwood or the like into an appropriate size in advance. Input waste is 0.5-2
It slowly moves through the furnace over time and is gradually carbonized.
【００１０】このとき炉内を微正圧かつ還元雰囲気に維
持するためにパージガスが供給されるが、本発明では従
来とは逆に、炉体１の後部にパージガス供給口８を設
け、パージガスを後部から前部に向けて流して前部のガ
ス排出口９から抜き取る。すなわち、本発明では炭化物
（廃棄物）の移動方向とパージスの移動方向とは逆にな
る。パージガスとしては一般に窒素などの不活性ガスや
天然ガスなどの可燃ガスが用いられるが、活性炭を製造
する際には水蒸気を用いて賦活することができる。At this time, a purge gas is supplied to maintain the inside of the furnace at a slightly positive pressure and a reducing atmosphere. However, in the present invention, a purge gas supply port 8 is provided at the rear portion of the furnace body 1 so that the purge gas is supplied. The gas flows from the rear to the front and is extracted from the gas outlet 9 at the front. That is, in the present invention, the moving direction of the carbide (waste) is opposite to the moving direction of the purges. Generally, an inert gas such as nitrogen or a combustible gas such as natural gas is used as the purge gas. When producing activated carbon, it can be activated using steam.
【００１１】炉内に投入された廃棄物は、従来と同様に
還元雰囲気中で徐々に加熱されて炭化されて行き、炉体
後部の炭化物取り出し口６から冷却され取り出される。
しかしパージガスは炉体１の後部から前部に向けて流さ
れるため、炭化の初期段階で廃棄物から多量に発生する
有害ガスは、炉体１の前部のガス排出口９から速やかに
炉外に排出されることとなり、従来のように長時間にわ
たり炭化物と共存することがない。また有害ガスの一部
は炭化物に付着するが、炉体１の後部に移動した際に、
後部のパージガス供給口８から供給される新鮮なパージ
ガスと接触することにより置換されて除去されるため、
炭化物取り出し口６から取り出された炭化物は臭気のな
い高品位の炭化物となる。The waste put into the furnace is gradually heated and carbonized in a reducing atmosphere as in the prior art, and cooled and taken out from a carbide take-out port 6 at the rear of the furnace body.
However, since the purge gas flows from the rear part of the furnace 1 toward the front, a large amount of harmful gas generated from waste in the initial stage of carbonization is quickly discharged from the gas discharge port 9 in the front part of the furnace 1. And it does not coexist with carbides for a long time as in the prior art. Some of the harmful gas adheres to the carbide, but when it moves to the rear of the furnace 1,
Since it is replaced and removed by contact with fresh purge gas supplied from the rear purge gas supply port 8,
The carbide taken out from the carbide take-out port 6 becomes high-quality carbide without odor.
【００１２】[0012]
【発明の効果】このように、本発明によればパージガス
の流れ方向を従来とは逆としたことにより、炭化物が有
害ガスと接触する時間を短縮し、また炭化物が接触する
有害ガスの濃度を低くすることができる。従って、臭気
のない炭化物を得ることができる。また炭化物を活性炭
として利用する場合にも、吸着性能の高い活性炭を得る
ことができる。しかも本発明はパージガスの流れ方向を
変えるだけで実施できるので、既存の炭化炉に僅かの変
更を加えるだけで、炭化物の品位を向上できる利点があ
る。As described above, according to the present invention, by setting the flow direction of the purge gas to be opposite to the conventional one, the time required for the carbide to contact the harmful gas is reduced, and the concentration of the harmful gas contacted by the carbide is reduced. Can be lower. Therefore, a carbide having no odor can be obtained. Also, when a carbide is used as activated carbon, activated carbon having high adsorption performance can be obtained. In addition, the present invention can be carried out only by changing the flow direction of the purge gas. Therefore, there is an advantage that the quality of carbide can be improved by making a slight change to the existing carbonization furnace.
【図１】本発明の実施形態を示す炭化炉の断面図であ
る。FIG. 1 is a sectional view of a carbonization furnace showing an embodiment of the present invention.
【図２】従来の技術を示す炭化炉の断面図である。FIG. 2 is a sectional view of a carbonization furnace showing a conventional technique.
１ 炉体、２ 投入口、３ 加熱室、４ バーナー、５
従来のパージガス供給口、６ 炭化物取り出し口、７
従来のガス排出口、８ 本発明のパージガス供給口、
９ 本発明のガス排出口1 furnace body, 2 inlet, 3 heating room, 4 burner, 5
Conventional purge gas inlet, 6 Carbide outlet, 7
A conventional gas discharge port, 8 a purge gas supply port of the present invention,
9. Gas outlet of the present invention
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０２Ｆ 11/12 Ｃ０９Ｋ 17/32 ＺＡＢＨ Ｃ０９Ｋ 17/32 ＺＡＢ Ｃ１０Ｂ 47/30 Ｃ１０Ｂ 47/30 53/02 53/02 Ｃ０９Ｋ 101:00 // Ｃ０９Ｋ 101:00 Ｂ０９Ｂ 3/00 ＺＡＢ Ｆターム(参考） 4D004 AA02 AA12 BA02 BA06 CA26 CB09 CB34 CC01 DA02 DA06 DA07 DA10 4D059 AA03 BB03 BB14 CC10 4G046 CA00 CB02 CC03 CC09 HA02 HA09 HB02 HC08 HC09 HC12 HC23 4H012 HA03 JA03 JA11 4H026 AA15 AA18 AA19 AB04 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C02F 11/12 C09K 17/32 ZABH C09K 17/32 ZAB C10B 47/30 C10B 47/30 53/02 53 / 02 C09K 101: 00 // C09K 101: 00 B09B 3/00 ZAB F-term (reference) 4D004 AA02 AA12 BA02 BA06 CA26 CB09 CB34 CC01 DA02 DA06 DA07 DA10 4D059 AA03 BB03 BB14 CC10 4G046 CA00 CB02 CC03 CC09 HA02 HC09 HCB HC09 HC08 HC23 4H012 HA03 JA03 JA11 4H026 AA15 AA18 AA19 AB04
Claims (3)
炉体の前部から原材料を投入し、還元雰囲気中で間接加
熱して炭化させ後部から取り出す炭化物の製造方法にお
いて、炉内を微正圧に保ち、空気の混入を防ぎ、かつ還
元雰囲気に維持するパージガスを、炉体の後部から供給
して前部に向けて流すことを特徴とする炭化物の製造方
法。1. A method for producing a carbide in which a raw material is charged from a front portion of a furnace body of an indirectly heating rotary kiln type carbonization furnace, is carbonized by indirect heating in a reducing atmosphere, and is taken out from a rear portion. A method for producing a carbide, comprising: supplying a purge gas for maintaining, preventing the incorporation of air, and maintaining a reducing atmosphere from a rear portion of a furnace body and flowing toward a front portion.
物である請求項１記載の炭化物の製造方法。2. The method for producing a carbide according to claim 1, wherein the raw material is a waste such as driftwood, refuse, and dried sludge.
然ガスなどの可燃ガス又は水蒸気である請求項１記載の
炭化物の製造方法。3. The method for producing a carbide according to claim 1, wherein the purge gas is an inert gas such as nitrogen, a combustible gas such as natural gas, or steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000189177A JP2002003855A (en) | 2000-06-23 | 2000-06-23 | Manufacturing method of carbide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000189177A JP2002003855A (en) | 2000-06-23 | 2000-06-23 | Manufacturing method of carbide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002003855A true JP2002003855A (en) | 2002-01-09 |
Family
ID=18688839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000189177A Pending JP2002003855A (en) | 2000-06-23 | 2000-06-23 | Manufacturing method of carbide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002003855A (en) |
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| JP2006263529A (en) * | 2005-03-23 | 2006-10-05 | Shin Nihonkai Jukogyo Kk | System for deodorization of carbide using low-temperature carbonization furnace |
| JP2007119740A (en) * | 2005-09-30 | 2007-05-17 | Ngk Insulators Ltd | Process for production of carbide product and production apparatus |
| WO2007119698A1 (en) * | 2006-04-10 | 2007-10-25 | Intellectual Property Bank Corp. | Activated carbon, process for producing the same, and production apparatus |
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| WO2006072999A1 (en) * | 2005-01-06 | 2006-07-13 | Megumi Yamada | Process for producing liquid carbon fuel and apparatus therefor |
| JP2006263529A (en) * | 2005-03-23 | 2006-10-05 | Shin Nihonkai Jukogyo Kk | System for deodorization of carbide using low-temperature carbonization furnace |
| JP2007119740A (en) * | 2005-09-30 | 2007-05-17 | Ngk Insulators Ltd | Process for production of carbide product and production apparatus |
| WO2007119698A1 (en) * | 2006-04-10 | 2007-10-25 | Intellectual Property Bank Corp. | Activated carbon, process for producing the same, and production apparatus |
| JP2007285683A (en) * | 2006-04-20 | 2007-11-01 | Nec Tokin Corp | Rotary kiln |
| JP2010125392A (en) * | 2008-11-27 | 2010-06-10 | Ihi Corp | Sludge heating treatment method and sludge heating treatment apparatus |
| JP2013057021A (en) * | 2011-09-09 | 2013-03-28 | Metawater Co Ltd | Carbonization system |
| AU2013223201B2 (en) * | 2012-02-24 | 2015-07-23 | Mitsubishi Heavy Industries, Ltd. | Reformed coal production equipment, and method for controlling same |
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