JP3750881B2 - Ash melting furnace - Google Patents

Ash melting furnace Download PDF

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Publication number
JP3750881B2
JP3750881B2 JP15117096A JP15117096A JP3750881B2 JP 3750881 B2 JP3750881 B2 JP 3750881B2 JP 15117096 A JP15117096 A JP 15117096A JP 15117096 A JP15117096 A JP 15117096A JP 3750881 B2 JP3750881 B2 JP 3750881B2
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Prior art keywords
furnace
ash
melting furnace
ash melting
water
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JP15117096A
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JPH102539A (en )
Inventor
直明 安田
英樹 岩田
典房 林
賢一 田原
順也 西野
啓二 角田
俊行 鈴木
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株式会社石川島岩国製作所
石川島播磨重工業株式会社
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【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、都市ごみ焼却炉や各種焼却装置等から排出される焼却灰などを溶融処理する灰溶融炉に関するものである。 The present invention is a like ash discharged from municipal refuse incinerators and various incinerator or the like related to ash melting furnace for melting treatment.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
都市ごみ、下水汚泥等の各廃棄物は、焼却施設で焼却処理され、生じた焼却灰やばいじんは、従来埋め立て処分されていた。 Municipal solid waste, each waste such as sewage sludge is incinerated in the incineration facility, the resulting ash and dust had been conventional landfill disposal. しかし、埋立処分地枯渇の問題や有害重金属類の溶出による地下水汚染の問題があるため、溶融による減量・減容化と無害化の必要性が高まっている。 However, because there is a problem of groundwater contamination by elution of the problem and harmful heavy metals in landfill sites depletion, there is a growing need for reduction and volume reduction and detoxification due to melting.
【0003】 [0003]
このような背景で、焼却灰中の残留炭素、コークス、灯油および電力を熱源とした、焼却炉等から排出される焼却灰などを溶融処理する灰溶融炉が提案され、一部で実処理が行われている。 In this background, the residual carbon in the ash, coke, kerosene and electric power as a heat source, the ash melting furnace is proposed to melt processing, such as incineration ash discharged from incinerators, the actual processing part It has been made.
【0004】 [0004]
このうち、電力を熱源とした灰溶融炉には、プラズマアーク加熱方式や抵抗加熱方式などがある。 Among them, the ash melting furnace as a heat source of power, there is a plasma arc heating method or a resistance heating method.
【0005】 [0005]
抵抗加熱方式の灰溶融炉は、溶融スラグ内に対抗電極を配置し、直流または交流通電による電気抵抗熱(ジュール熱)により焼却灰を加熱溶融するものであり、▲1▼熱効率が高い、▲2▼発生ガスが少ない、▲3▼アークを生成しないためフリッカが発生しない、▲4▼溶融スラグと溶融メタルとを分離した分割出滓ができる、という特徴がある。 Ash melting furnace of the resistance heating method, place the counter electrode in the molten slag, which is heated and melted ash by electric resistance heat (Joule heat) by direct or alternating current, ▲ 1 ▼ high thermal efficiency, ▲ 2 ▼ generate less gas, ▲ 3 ▼ flicker does not occur because it does not generate an arc, ▲ 4 ▼ can split tapping the separation of the molten slag and the molten metal, is characterized in that.
【0006】 [0006]
図2は従来の抵抗加熱方式の灰溶融炉の縦断面図である。 Figure 2 is a longitudinal sectional view of the ash melting furnace of a conventional resistance heating method. 図において、aは灰溶融炉である。 In FIG., A is an ash melting furnace. この灰溶融炉aの炉壁bは、全体に内部に水冷管dを埋設した耐火レンガ等の耐火材による水冷ジャケットcを有して形成されている。 The furnace wall b of the ash melting furnace a is formed with a water-cooling jacket c by refractory material of the refractory bricks or the like embedded cooling water pipe d inside throughout. eは灰溶融炉aの頂部に設けた炉蓋である。 e is a furnace lid provided at the top of the ash melting furnace a. 焼却灰mは、この灰溶融炉aの炉蓋eに設けた灰投入管jから投入される。 Ash m is charged from the ash injection tube j provided in the furnace lid e of the ash melting furnace a. 灰溶融炉a内に投入された焼却灰mは、灰溶融炉aの炉蓋eに挿入した上部電極hおよび灰溶融炉aの炉底に埋設した炉底電極iにより加熱して溶融スラグnにするようにしている。 Ash m charged into the ash melting furnace a, molten slag n is heated by a furnace bottom electrode i embedded in the furnace bottom of the upper electrode h and ash melting furnace a inserted into the furnace lid e ash melting furnace a so that to. 灰溶融炉a内に溶融スラグnが所要量溜まると、溶融スラグnを自重によって加わるヘッド圧により灰溶融炉aの炉壁b下部に設けた出滓口fを通して外部に出滓するようになっている。 When accumulated requirements molten slag n the ash melting furnace a, so as to tapping the outside through tapping port f provided in the furnace wall b bottom ash melting furnace a by head pressure exerted by its own weight molten slag n ing. kは灰溶融炉aの炉蓋eに設けた排気管である。 k is an exhaust pipe provided in the furnace lid e ash melting furnace a. oは灰溶融炉a内底部に溜まった溶融メタルで、溶融スラグnと同様に所要量溜まると、排出口gを通して外部に排出するようになっている。 o the molten metal collected in the ash melting furnace a bottom inside and accumulates requirements similar to the molten slag n, is adapted to discharge to the outside through the discharge port g. pは上部電極hおよび底部電極iに直流通電する電源であり、qおよびrはその電線である。 p is a power supply for DC application to the upper electrode h and bottom electrodes i, q and r are the wires. なお、この従来例の他に、出滓口fを灰溶融炉aの炉壁bの高さ方向の中央部に設けて溶融スラグnを連続的にオーバーフローさせて出滓させるものもある。 Incidentally, the addition to the conventional example, there is also a Dekasuguchi f those for the molten slag n provided in a central portion in the height direction of the furnace wall b of ash melting furnace a continuously overflow tapping.
【0007】 [0007]
灰溶融炉aの炉壁bおよび炉蓋eには、一般に気孔率20%〜30%の高アルミナ質の耐火材が使用される。 The furnace wall b and furnace roof e ash melting furnace a, generally the porosity of 20% to 30% high alumina refractory material is used.
【0008】 [0008]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
しかしながら、図2に示すような灰溶融炉では、灰溶融炉の炉壁を、内部に水冷管を埋設した水冷ジャケットを有する炉壁で形成しているため、炉壁の耐火材が灰溶融炉内の高温の溶融スラグにより損耗し、放置しておくと水冷管を破損する恐れがあるなどの問題がある。 However, the ash melting furnace as shown in FIG. 2, the furnace wall of the ash melting furnace, because it formed in a furnace wall having a water-cooling jacket embedded with a water-cooled pipe inside, ash melting furnace refractories of furnace walls worn by the high temperature of the molten slag of the inner, there are problems such as there is a risk of damaging the upon standing water cooling pipe.
【0009】 [0009]
本発明は、上記のような問題点を解決するために創案されたもので、水冷ジャケットを設けることなく、耐火材の寿命を長くするような灰溶融炉を提供することを目的とするものである。 The present invention has been developed to solve the problems described above, without providing a water-cooling jacket, it aims at providing ash melting furnace so as to prolong the life of the refractory material is there.
【0010】 [0010]
【課題を解決するための手段】 In order to solve the problems]
上記目的を達成するため、本発明によれば、焼却灰を溶融処理する灰溶融炉であって、該灰溶融炉の炉壁の外面の鉄皮を、散水により冷却するようにし、灰溶融炉の底部を、空冷により冷却するようにし、灰溶融炉の底部を空冷した空気を、炉壁外面の鉄皮の散水面に沿って通風するようにした、ことを特徴とする灰溶融炉が提供される。 To achieve the above object, according to the present invention, there is provided a ash melting furnace for melting processes incinerator ash, the furnace shell of the outer surface of the furnace wall The ash melting furnace, so as to cool by water spray, molten ash the bottom of the furnace, so as to cool the air, the air that has cooled the bottom of the ash melting furnace so as to air along the nozzle face of the steel shell of the furnace wall outer surface, ash melting furnace, characterized in that it It is provided.
【0013】 [0013]
さらに、散水後の水を、灰溶融炉の底部に張り出して設けた受け皿で受けて循環させながら散水するようにするのが好ましい。 Furthermore, the water after watering, preferably so that the water spray while circulating is received by the saucer provided overhanging the bottom of the ash melting furnace.
【0014】 [0014]
上記本発明の構成によれば、炉壁の外面の鉄皮に散水し、その蒸発により炉壁を冷却するようにしたので、炉壁の冷却効率を高めることができ、したがって、耐火材の寿命を長くすることができる。 According to the configuration of the present invention, water is sprayed on steel shell of the outer surface of the furnace wall, since so as to cool the furnace wall by its evaporation, it is possible to enhance the cooling efficiency of the furnace wall, thus, life of refractory materials it can be lengthened. 蒸発潜熱による冷却なので冷却水管も少なくてすむ。 Since cooling by evaporation latent heat of fewer also cooling water pipe. また、灰溶融炉の底部を、空冷により冷却するようにしたので、灰溶融炉底部の炉壁の冷却効率を高めることができるとともに、空冷した後の温められた空気が炉壁に沿って上昇する際、水の蒸発作用を高めるので、冷却効率を一層高めることができる。 Also, increasing the bottom of the ash melting furnace. Thus cooled by air cooling, it is possible to increase the cooling efficiency of the furnace wall of ash melting furnace bottom, it warmed air after air cooling along the furnace wall when, therefore increasing the evaporation action of water, it is possible to enhance the cooling efficiency further.
【0015】 [0015]
また、散水後の水を、灰溶融炉の底部に張り出して設けた受け皿で受けて循環させながら散水するようにしたので、冷却水の無駄をなくすことができる。 Further, the water after watering. Thus watering while circulating is received by the saucer provided overhanging the bottom of the ash melting furnace, it is possible to eliminate the waste of coolant.
【0016】 [0016]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
以下、本発明の好ましい実施の形態を図面に基づいて説明する。 Hereinafter will be described the preferred embodiments of the present invention with reference to the accompanying drawings.
図1は、本発明の一実施形態を示すものであり、図1は本発明による灰溶融炉の冷却装置の縦断面図である。 Figure 1 shows an embodiment of the present invention, FIG. 1 is a longitudinal sectional view of the cooling device of ash melting furnace according to the present invention.
図において、1は焼却灰を溶融処理する灰溶融炉である。 In FIG, 1 is a ash melting furnace for melting processes incinerator ash. 2はこの灰溶融炉1の炉壁で、全体に耐火レンガにより形成されるとともに、外周面は鉄皮3で形成されている。 2 is a furnace wall of the ash melting furnace 1, while being formed by refractory bricks on the entire outer peripheral surface is formed in a steel shell 3. 4は灰溶融炉1の頂部に設けた炉蓋である。 4 is a furnace lid provided at the top of the ash melting furnace 1. 5はこの炉蓋4に設けた電極挿入口に挿入した上部電極であり、5aは灰溶融炉1の底部2aに、上部電極5と対峙するように埋設した炉底電極である。 5 is a top electrode inserted into the electrode insertion port provided to the furnace lid 4, 5a on the bottom 2a of the ash melting furnace 1 is a furnace bottom electrodes buried so as to face the upper electrode 5. 6は炉蓋4に設けられた焼却灰投入管で、7はその投入口である。 6 is incineration ash feeding pipe provided in the furnace lid 4, 7 is its inlet. 8は焼却灰投入管6と同様に炉蓋4に設けられた排気管で、9はその排出口である。 8 is an exhaust pipe provided in the same manner furnace cover 4 and the incineration ash feeding pipe 6, 9 is its outlet. 10は灰溶融炉1内に焼却灰投入管6を通して投入された焼却灰で、上部電極5および炉底電極5aに、電源から直流通電することにより加熱溶解して溶融スラグ11と溶融メタル12とに分離し、溶融スラグ11は、灰溶融炉1の下方部に設けられた、出滓口から出滓される。 10 is ash which is turned through incineration ash feeding pipe 6 to the ash melting furnace 1, the upper electrode 5 and the furnace bottom electrode 5a, and the molten slag 11 is heated dissolved by DC application from the power supply and the molten metal 12 separating the molten slag 11 is provided in the lower part of the ash melting furnace 1 is tapping the tapping port. また、溶融スラグ11と分離して灰溶融炉1底部に溜まった溶融メタル12は固まっており、電極5との間でアークを発生させてメタルを溶融してから、排出口を通して外部に排出される。 Further, the molten metal 12 that accumulates on the ash melting furnace 1 bottom separate from the molten slag 11 is solidified, after being melted metal by generating an arc between the electrode 5, is discharged to the outside through the discharge port that. なお、前記溶融スラグ11の出滓口、溶融メタル12の排出口,上部電極5および炉底電極5aに通電する電源は、いずれも図示していないが、従来のものの構造と実質的に同じである。 The power supply for energizing tapping port of the molten slag 11, the outlet of the molten metal 12, the upper electrode 5 and the furnace bottom electrodes 5a are both not shown, conventional ones structure and substantially the same is there.
【0017】 [0017]
13は冷却水槽で、貯水槽25から給水ポンプ26により給水管27を通して送給された散水用水17を貯水しておき、焼却灰10を溶解する際、炉壁2の鉄皮3の外周面に向けて散水する。 13 is a cooling water bath, the water supply pump 26 from the reservoir 25 leave water the feed has been sprinkled water 17 through the water supply pipe 27, when dissolving the ash 10, the outer peripheral surface of the furnace shell 3 of the furnace wall 2 toward watering in. 16は炉壁2の鉄皮3の外周面に沿って上下に多段に配設された複数本の環状の散水管であり、この散水管には炉壁2の鉄皮3に向かって散水するように多数の散水孔16aが設けられている。 16 is a sprinkling pipe a plurality of annular arranged in multiple stages vertically along the outer peripheral surface of the furnace shell 3 of the furnace wall 2, in this sprinkling pipe sprays water towards the furnace shell 3 of the furnace wall 2 number of nozzle holes 16a are provided so as. なお、この散水孔16の向きを替えることにより、散水角度を任意に変更することができる。 Incidentally, by changing the orientation of the nozzle holes 16 can be arbitrarily changed watering angle. 14は上端を冷却水槽13に連結した給水管で、下端は分岐して各環状の散水管16にそれぞれ連結している。 14 is a water supply pipe which connects the upper end to the cooling water tank 13, the lower end are linked respectively branches to sprinkling pipe 16 of each annular. そして、冷却水17をポンプ15により環状の散水管16に給水する。 Then, the water supply to the cooling water 17 in an annular sprinkling pipe 16 by the pump 15. 18は灰溶融炉1の底部2aに張り出して設けられた水受け皿で、散水された水17を受け、この水受け皿18に一端を連結した排水管19を通して貯水槽25に戻すようにしている。 18 is a water pan provided in overhang on the bottom 2a of the ash melting furnace 1 receives the sprinkling water 17, and returned to the water tank 25 through the drain pipe 19 which is connected at one end to the water receiving tray 18.
【0018】 [0018]
20は灰溶融炉1の底部2aおよび炉壁2を囲繞するように設けた囲壁である。 20 is a surrounding wall provided so as to surround the bottom 2a and the furnace wall 2 of the ash melting furnace 1. 22は上端をこの囲壁20の底部に連結し、下端を空冷ファン21に連結した送風管で、焼却灰10を溶解する際、空冷ファン21によって冷却空気を灰溶融炉1の底部2aに向けて送風するとともに、灰溶融炉1の底部2aに吹きつけた空気を、炉壁2の鉄皮3と囲壁20との間隙を炉壁2に沿って上昇させ、排気管23を通して排出するようになっている。 22 connecting the top end to the bottom of the enclosure 20, with the blower tube connecting the lower end to the air-cooling fan 21, when dissolving the ash 10, the cooling air towards the bottom 2a of the ash melting furnace 1 by the cooling fans 21 while blowing, the air blown to the bottom 2a of the ash melting furnace 1 is raised along the gap between the steel shell 3 and the surrounding wall 20 of the furnace wall 2 to the furnace wall 2, so as to discharge through the exhaust pipe 23 ing. このようにして、空冷した後の温められた空気が炉壁2に沿って上昇する際、水の蒸発作用を高める。 Thus, it warmed air after cooling is during rising along the furnace wall 2, increasing the evaporation action of water. 24は排気管23の立ち上り部に下方に突出するように設けたドレン受け部であり、このドレン受け部24で受けたドレンは、ドレン管19aにより貯水槽25に戻されるようになっている。 24 is a drain receiving portions provided so as to protrude downward to the rising portion of the exhaust pipe 23, drain received by the drain pan 24, and is returned to the water tank 25 by the drain pipe 19a.
【0019】 [0019]
次に実施の形態に基づく作用について説明する。 Next a description will be given of the operation based on the embodiment.
灰溶融炉1内に投入された焼却灰10を、電源から上部電極5および炉底電極5aに直流通電し、加熱して溶融スラグ11を生成する。 The has been incineration ash 10 is turned to the ash melting furnace 1, and a DC power to the upper electrode 5 and the furnace bottom electrode 5a from a power source, heated to generate a molten slag 11. 焼却灰11は、灰溶融炉1内では1,200°Cで溶融するが、灰溶融炉1内での溶融スラグ11の最適温度は、1,200°〜1,300°Cと高温であり、焼却灰10に含まれている塩類も蒸発して炉壁2の耐火材に付着し、耐火材に浸透して耐火材を損耗するが、炉壁2の鉄皮3の外周面に向けて冷却水17を散水し、炉壁2を冷却するので、炉壁2の耐火材の損耗を少なくすることができ、耐火材の寿命を長くすることができる。 Ash 11 is melted at 1,200 ° C is in the ash melting furnace 1, the optimum temperature of the molten slag 11 at the ash melting furnace 1 is an 1,200 ° ~1,300 ° C and high temperature also salts contained in the incineration ash 10 evaporates adhering to the refractory material of the furnace wall 2, but to penetrate the refractory material wears a refractory material, toward the outer circumferential surface of the furnace shell 3 of the furnace wall 2 watering cooling water 17, so cooling the furnace wall 2, it is possible to reduce the wear of the refractory material of the furnace wall 2, it is possible to increase the life of the refractory material. また、冷却水の蒸発による冷却なので、冷却水の使用量が少なくてすむ。 Further, since the cooling caused by evaporation of the cooling water, it requires less amount of the cooling water is. 底部を空冷することにより、炉の耐久性を高めることができる。 By cooling the bottom, it is possible to improve the durability of the furnace. 水を循環使用することにより、さらに冷却水の使用量を減らすことができる。 By recycling the water, it is possible to further reduce the amount of cooling water.
【0020】 [0020]
本発明は、上記実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々変更し得ることは勿論である。 The present invention is not intended to be limited to the above embodiment, and may obviously be variously modified without departing from the scope of the present invention.
【0021】 [0021]
【発明の効果】 【Effect of the invention】
以上述べたように、本発明によれば、溶融炉内に投入された焼却灰を溶融する際、炉壁の鉄皮の外周面に冷却水を散水して冷却し、耐火材の溶損を防止しているので、耐火材の寿命を長くすることができるなどの優れた効果を奏する。 As described above, according to the present invention, when melted is charged into the melting furnace ash, and cooled by water spray cooling water on the outer peripheral surface of the steel shell of the furnace wall, the erosion of the refractory material since prevented, an excellent effect such as can increase the life of the refractory material.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明による灰溶融炉の縦断面図である。 1 is a longitudinal sectional view of the ash melting furnace according to the present invention.
【図2】従来の灰溶融炉の縦断面図である。 2 is a longitudinal sectional view of a conventional ash melting furnace.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 灰溶融炉2 炉壁2a 炉底部3 鉄皮4 炉蓋5 上部電極5a 炉底電極6 焼却灰投入管7 焼却灰投入口8 排気管9 排気口10 焼却灰11 溶融スラグ12 溶融メタル13 冷却水槽14,27 給水管15,26 給水ポンプ16 環状の散水管16a 散水孔17 冷却水18 水受け皿19,19a 排水管20 囲壁21 空冷ファン22 送風管23 排気管24 ドレン受け部25 貯水槽a 灰溶融炉b 炉壁c 水冷ジャケットd 水冷管e 炉蓋f 出滓口g 排出口h 上部電極i 炉底電極j 焼却灰投入管k 排気管m 焼却灰n 溶融スラグo 溶融メタルp 電源q,r 電線 1 ash melting furnace 2 furnace wall 2a furnace bottom 3 steel shell 4 furnace lid 5 upper electrode 5a bottom electrode 6 ash feeding pipe 7 ash inlet 8 exhaust pipe 9 outlet 10 ash 11 molten slag 12 melt metal 13 cooled aquarium 14 and 27 water supply pipe 15, 26 feed pump 16 annular sprinkling pipe 16a nozzle holes 17 cooling water 18 water receiving tray 19,19a drainage pipe 20 surrounding wall 21 blower 22 air duct 23 exhaust pipe 24 drain pan section 25 reservoir a ash melting furnace b furnace wall c cooling jacket d cooling water pipe e furnace lid f Dekasuguchi g outlet h upper electrode i bottom electrode j ash feeding pipe k exhaust pipe m ash n molten slag o molten metal p power q, r Electrical wire

Claims (2)

  1. 焼却灰を溶融処理する灰溶融炉であって、該灰溶融炉の炉壁の外面の鉄皮を、散水により冷却するようにし、 A ash melting furnace for melting processes incinerator ash, the furnace shell of the outer surface of the furnace wall The ash melting furnace, so as to cool by water spray,
    灰溶融炉の底部を、空冷により冷却するようにし、 The bottom of the ash melting furnace, so as to cool the air,
    灰溶融炉の底部を空冷した空気を、炉壁外面の鉄皮の散水面に沿って通風するようにした、ことを特徴とする灰溶融炉。 The air that has cooled the bottom of the ash melting furnace so as to air along the nozzle face of the steel shell of the furnace wall outer surface, ash melting furnace, characterized in that.
  2. 散水後の水を、灰溶融炉の底部に張り出して設けた受け皿で受けて循環させながら散水するようにした請求項1に記載の灰溶融炉。 The water after watering, ash melting furnace according to claim 1 which is adapted to sprinkle while circulating is received by the saucer provided overhanging the bottom of the ash melting furnace.
JP15117096A 1996-06-12 1996-06-12 Ash melting furnace Expired - Lifetime JP3750881B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15117096A JP3750881B2 (en) 1996-06-12 1996-06-12 Ash melting furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15117096A JP3750881B2 (en) 1996-06-12 1996-06-12 Ash melting furnace

Publications (2)

Publication Number Publication Date
JPH102539A true JPH102539A (en) 1998-01-06
JP3750881B2 true JP3750881B2 (en) 2006-03-01

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JP15117096A Expired - Lifetime JP3750881B2 (en) 1996-06-12 1996-06-12 Ash melting furnace

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4800853A (en) * 1988-01-11 1989-01-31 Excelermatic Inc. Adiabatic internal combustion engine
EP2021894A4 (en) 2006-05-05 2010-10-13 Plascoenergy Ip Holdings Slb A gas homogenization system
EP2260241A4 (en) 2007-02-27 2012-03-28 Plascoenergy Ip Holdings S L Gasification system with processed feedstock/char conversion and gas reformulation
US9321640B2 (en) 2010-10-29 2016-04-26 Plasco Energy Group Inc. Gasification system with processed feedstock/char conversion and gas reformulation

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JPH102539A (en) 1998-01-06 application

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