JP2008081638A - Method for gasifying woody biomass - Google Patents

Method for gasifying woody biomass Download PDF

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JP2008081638A
JP2008081638A JP2006264313A JP2006264313A JP2008081638A JP 2008081638 A JP2008081638 A JP 2008081638A JP 2006264313 A JP2006264313 A JP 2006264313A JP 2006264313 A JP2006264313 A JP 2006264313A JP 2008081638 A JP2008081638 A JP 2008081638A
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melting point
furnace
woody biomass
raw material
gasification
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Hiroyuki Yokomaku
宏幸 横幕
Keizo Takegami
敬三 竹上
Takafumi Yamamoto
隆文 山本
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Tsukishima Kikai 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
    • Y02E50/30—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
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/58—Construction or demolition [C&D] waste
    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for gasifying a woody biomass, by which the production of clinkers can especially be prevented. <P>SOLUTION: This method for gasifying the woody biomass, comprising charging a raw material comprising the woody biomass into a fixed bed gasification oven 6, is characterized by gasifying in a state that a melting point-enhancing substance exists in the gasification oven 6, and supplying the melting point-enhancing substance together with the raw material into the gasification oven 6 or together with air through an oxidizing agent-charging port 67. An exclusive charging port is preferably disposed at a height position near to the oxidizing agent-charging port 67, and the melting point-enhancing substance can be supplied into the oven 6 through the charging port separately from air. The melting point-enhancing substance includes calcium carbonate, calcium hydroxide, calcium oxide, calcium phosphate and dolomite, and can be used in a powdery or particulate form. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、木質バイオマスのガス化方法に関し、特にクリンカの発生を抑制するガス化方法に関する。   The present invention relates to a gasification method for woody biomass, and more particularly to a gasification method for suppressing the generation of clinker.

従来から、森林から得られる枝、葉、梢、根株等の林地残材、製材工場から出るオガ粉、樹皮、端材、背板等の残廃材、建築廃材・解体材などの産業廃棄物等といった木質バイオマスをガス化し、燃料等として使用することが行われている。
この場合におけるガス化炉の形式として、流動床式や固定床式のものが広く用いられている。特に固定床式は比較的小規模の設備として設計し得ることから山間部の製材所等、中小規模の設備への適用が可能である（例えば特許文献１参照）。両形式ともガス化される木質バイオマスはガス化炉投入前に細かく破砕された後、投入されることが一般的である。（例えば特許文献２参照）。
特開昭５９−３８２８４号公報 特開２００２−３８１６３号公報 Conventionally, forest residue such as branches, leaves, treetops and roots obtained from forests, sawdust from lumber mills, residual materials such as bark, scraps and backboard, industrial waste such as construction and demolition materials, etc. Such woody biomass is gasified and used as fuel.
In this case, a fluidized bed type or a fixed bed type is widely used as a gasification furnace. In particular, since the fixed floor type can be designed as a relatively small-scale facility, it can be applied to small- and medium-scale facilities such as a mountain mill. In both types, the woody biomass to be gasified is generally fed after being crushed finely before the gasifier is charged. (For example, refer to Patent Document 2).
JP 59-38284 A JP 2002-38163 A

しかしながら、従来の方法では、バーク（樹皮）のような融点の低い木質バイオマスの場合、炉内にクリンカ（焼塊）が発生するという問題点があった。
そこで、本発明の主たる課題は、クリンカの発生を抑制することにある。 However, in the conventional method, in the case of woody biomass having a low melting point such as bark (bark), there is a problem that clinker (burned ingot) is generated in the furnace.
Therefore, a main problem of the present invention is to suppress the generation of clinker.

上記課題を解決した本発明は、木質バイオマスからなる原料をガス化炉に投入しガス化する方法において、
前記原料の融点を上昇させる作用を有する融点上昇物質をガス化炉内に存在させた状態でガス化を行うことを特徴とする木質バイオマスのガス化方法である。
このように、ガス化に際して、炉内に融点上昇物質を存在させることにより、原料の融点が上昇し、クリンカが発生し難くなる。
融点上昇物質は、原料とともに炉内に投入することができる。また、通常のガス化炉のように炉内に空気等の酸化剤を供給する吹込口を有している場合、特に吹込口の近傍にクリンカが発生し易いため（実験により確認済み）、吹込口を介して空気とともに融点上昇物質を炉内に投入するか、あるいはこの吹込口の近傍の高さ位置に設けた投入口を介して空気とは別に融点上昇物質を炉内に投入するのは好ましい。 The present invention that has solved the above problems is a method of gasifying a raw material consisting of woody biomass into a gasifier,
A method for gasifying woody biomass, characterized in that gasification is performed in a state where a melting point-increasing substance having an action of increasing the melting point of the raw material is present in a gasification furnace.
In this way, when the gasification is performed, the melting point-increased substance is present in the furnace, so that the melting point of the raw material is increased and clinker is hardly generated.
The melting point raising substance can be put into the furnace together with the raw material. In addition, when there is a blow-in port for supplying an oxidant such as air into the furnace as in a normal gasification furnace, the clinker is likely to be generated in the vicinity of the blow-in port (confirmed by experiments). The melting point increasing substance is introduced into the furnace together with the air through the mouth, or the melting point increasing substance is introduced into the furnace separately from the air through the inlet provided at a height position near the inlet. preferable.

以上のとおり、本発明によればクリンカの発生を効果的に防止できる。   As described above, according to the present invention, the generation of clinker can be effectively prevented.

以下、本発明の一実施形態について添付図面を参照しながら詳説する。
図１は、ガス化発電設備例のフローシートを示している。バーク（樹皮）等の木質バイオマス原料Ｂは原料ピット１に貯留されており、順次ピットクレーン２により取り出され、投入ホッパー３に投入される。木質バイオマス原料としては、森林から得られる枝、葉、梢、根株等の林地残材、製材工場から出るオガ粉、バーク（樹皮）、端材、背板等の残廃材、建築廃材・解体材などの産業廃棄物等を用いることができる。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a flow sheet of an example of a gasification power generation facility. The woody biomass material B such as bark (bark) is stored in the material pit 1, and is sequentially taken out by the pit crane 2 and is introduced into the input hopper 3. Woody biomass raw materials include forest residue such as branches, leaves, treetops and roots obtained from forests, sawdust from lumber mills, bark (bark), scraps, backboard and other waste materials, building waste materials and demolition materials Industrial wastes such as can be used.

ホッパー３に投入された原料はコンベヤ４によって移送され、固定床ガス化炉６に対して供給される。図示形態では、ガス化炉の入側に、上下に離間配置された投入ダンパー５Ａ，５Ｂが設けられており、下側のダンパー５Ｂが閉じられかつ上側のダンパー５Ａが開けられた状態で両ダンパー５Ａ，５Ｂ間にコンベヤ４からの原料が順次投入され、次いで上側のダンパー５Ａが閉じられた後、下側のダンパー５Ｂが開けられることにより、ダンパー５Ａ，５Ｂ間に保持された原料がガス化炉６上部に投入されるようになっている。以降は、この繰り返しにより順次原料がガス化炉６内に供給される。ガス化炉６としては、固定床である限り、上向流式であっても下向流式（ダウンドラフト式）であっても良い。ダウンドラフト式の方が、タールや油分の発生が少ない利点がある。   The raw material thrown into the hopper 3 is transferred by the conveyor 4 and supplied to the fixed bed gasifier 6. In the illustrated embodiment, charging dampers 5A and 5B spaced apart from each other are provided on the inlet side of the gasification furnace, and both dampers are in a state where the lower damper 5B is closed and the upper damper 5A is opened. The raw material from the conveyor 4 is sequentially charged between 5A and 5B, and then the upper damper 5A is closed, and then the lower damper 5B is opened, whereby the raw material held between the dampers 5A and 5B is gasified. The upper part of the furnace 6 is charged. Thereafter, the raw material is sequentially supplied into the gasification furnace 6 by this repetition. As long as it is a fixed bed, the gasification furnace 6 may be an upward flow type or a downward flow type (downdraft type). The downdraft type has the advantage of less tar and oil generation.

ダウンドラフト式ガス化炉６の具体例が図２に示されている。すなわち、このガス化炉６は、ホッパーとしての役割を担う上部筒状部６１と、この上部筒状部６１の底部開口から連続する下部筒状部６２と、下部筒状部６２を隙間をもって取り囲む筒状ケーシング６３とを備えている。これら上部筒状部等６１，６２，６３はそれぞれ縦向き且つ相互に同軸的に配置されている。下部筒状部６２の底部開口には火格子６４が設けられている。下部筒状部６２の高さ方向中間部には、炉内を上下に仕切る仕切り板６５が設けられており、この仕切り板６５の幅方向中央部には上下に貫通する通過孔６６が形成されている。さらに、下部筒状部６２内における仕切り板６５よりも上側の内周壁には、酸化剤の吹込口６７が炉内の幅方向中央を臨むように突出されている。吹込口６７の先端は通過孔６６の縁よりも外側の位置、つまり仕切り板６５における通過孔６６を有しない周囲部の上方に位置している。この吹込口６７は下部筒状部６２の内周方向に沿って適宜の間隔（例えば等間隔）で複数設けるのが好ましい。また、吹込口６７は下部筒状部６２の内周方向に沿って連続するスリット状に形成することもできる。   A specific example of the downdraft type gasification furnace 6 is shown in FIG. That is, the gasification furnace 6 surrounds the upper cylindrical portion 61 serving as a hopper, the lower cylindrical portion 62 continuous from the bottom opening of the upper cylindrical portion 61, and the lower cylindrical portion 62 with a gap. And a cylindrical casing 63. These upper cylindrical portions 61, 62, 63 are arranged vertically and coaxially with each other. A grate 64 is provided at the bottom opening of the lower cylindrical portion 62. A partition plate 65 that partitions the inside of the furnace up and down is provided at an intermediate portion in the height direction of the lower cylindrical portion 62, and a passage hole 66 penetrating vertically is formed at the center in the width direction of the partition plate 65. ing. Further, an oxidant blowing port 67 projects from the inner peripheral wall above the partition plate 65 in the lower cylindrical portion 62 so as to face the center in the width direction in the furnace. The tip of the blowing port 67 is positioned outside the edge of the passage hole 66, that is, above the peripheral portion of the partition plate 65 that does not have the passage hole 66. It is preferable to provide a plurality of the blowing ports 67 at appropriate intervals (for example, at equal intervals) along the inner circumferential direction of the lower cylindrical portion 62. Further, the blowing port 67 can be formed in a slit shape that is continuous along the inner peripheral direction of the lower cylindrical portion 62.

吹込口６７に対する供給路は適宜形成することができるが、図示形態では、下部筒状部６２が内筒部６２Ａおよび外筒部６２Ｂからなる二重筒状に形成されており、内筒部６２Ａと外筒部６２Ｂとの間の円筒状空間６２Ｓの上部に吹込口６７が連通され、吹込口６７よりも下側の部分に外側ケーシング６３を貫通する供給管７０が連通されることによって、供給路が構成されている。   Although the supply path to the blowing port 67 can be appropriately formed, in the illustrated embodiment, the lower cylindrical portion 62 is formed in a double cylindrical shape including an inner cylindrical portion 62A and an outer cylindrical portion 62B, and the inner cylindrical portion 62A. The blower port 67 is communicated with the upper portion of the cylindrical space 62S between the outer cylinder part 62B and the supply pipe 70 penetrating the outer casing 63 is communicated with a portion below the blower port 67, thereby supplying the air. A road is constructed.

この供給管７０に対しては、図示しない空気供給ポンプ等の酸化剤供給手段が接続されており、供給管７０を介して燃焼のための空気や酸素等の酸化剤が供給される。   An oxidant supply means such as an air supply pump (not shown) is connected to the supply pipe 70, and an oxidant such as air or oxygen for combustion is supplied through the supply pipe 70.

ガス化炉６内に供給された原料は、上部筒状部６１及び下部筒状部６２を下降・通過する過程でガス化される。すなわち、上部筒状部６１から順次供給される原料は、吹込口６７よりも若干上側の熱分解ゾーンに到達すると、熱分解が開始され、ガス（ＣＯ、Ｈ2、ＣＨ4、ＣＯ2、Ｈ2Ｏ）、チャー、炭化水素に分解される。この熱分解ステップの熱源は、次述の燃焼ステップにより発生する熱である。 The raw material supplied into the gasification furnace 6 is gasified in the process of descending and passing through the upper cylindrical portion 61 and the lower cylindrical portion 62. That is, when the raw material sequentially supplied from the upper cylindrical portion 61 reaches the thermal decomposition zone slightly above the blowing port 67, thermal decomposition is started and gas (CO, H 2 , CH 4 , CO 2 , H 2 O), decomposed into char and hydrocarbon. The heat source of this pyrolysis step is heat generated by the combustion step described below.

次いで、この熱分解ステップで生成したガス、チャー、炭化水素は吹込口６７から仕切り板６５に至る燃焼・ガス化ゾーンに到達し、吹込口６７から供給される酸化剤によって燃焼されるとともに、生成したチャーが、温度約７００〜１２００℃で、主にＢｏｕｄｏｕａｒｄ反応と水生ガス反応によりＣＯとＨ2に変換され、ガス化が達成される。発生したガスは、火格子６４を通過し、下部筒状部６２の外面と外側ケーシング６３の内周面との間を通り、外側ケーシング６３に設けられた排出口７１を介して、外部に取り出される。 Next, the gas, char, and hydrocarbons generated in this pyrolysis step reach the combustion / gasification zone from the inlet 67 to the partition plate 65 and are burned by the oxidant supplied from the inlet 67 and generated. The char is converted into CO and H 2 at a temperature of about 700 to 1200 ° C. mainly by the Boudouard reaction and the aquatic gas reaction, and gasification is achieved. The generated gas passes through the grate 64, passes between the outer surface of the lower cylindrical portion 62 and the inner peripheral surface of the outer casing 63, and is taken out to the outside through the discharge port 71 provided in the outer casing 63. It is.

本発明では、ガス化に際して、ガス化炉６内に原料の融点を上昇させる作用を持つ融点上昇物質を存在させる。このために、予め原料に融点上昇物質を混入させる等により、原料とともに融点上昇物質をガス化炉６内に供給することができる。吹込口６７の近傍（特に、下向流式の場合には吹込口６７の下側、上向流式の場合には吹込口の上側）はクリンカが発生し易いため、吹込口６７を介して空気とともに融点上昇物質を炉６内に投入したり、吹込口６７近傍の高さ位置（特に、下向流式の場合には吹込口６７の下側、上向流式の場合には吹込口の上側）に専用の投入口を設け、この投入口を介して空気とは別に融点上昇物質を炉６内に投入したりするのは好ましい形態である。これらの融点上昇物質の供給位置は適宜組み合わせて使用できる。融点上昇物質としては、炭酸カルシウム、水酸化カルシウム、酸化カルシウム、燐酸カルシウム、ドロマイト等を用いることができ、粉状や粒子状の形態で用いることができる。融点上昇物質の添加量は、適宜定めることができるが、木質バイオマス原料に対して０．５〜２０重量％とするのが好ましい。   In the present invention, during gasification, a melting point raising substance having an action of raising the melting point of the raw material is present in the gasification furnace 6. For this reason, the melting point increasing substance can be supplied into the gasification furnace 6 together with the raw material by mixing the melting point increasing substance in the raw material in advance. The clinker is likely to be generated in the vicinity of the inlet 67 (particularly, the lower side of the inlet 67 in the case of the downward flow type and the upper side of the inlet in the case of the upward flow type). A melting point-raising substance is introduced into the furnace 6 together with air, or the height position near the inlet 67 (particularly the lower side of the inlet 67 in the case of the downward flow type, the inlet in the case of the upward flow type). It is a preferable mode that a dedicated inlet is provided on the upper side of the furnace 6 and a melting point-increasing substance is introduced into the furnace 6 separately from air through this inlet. The supply positions of these melting point raising substances can be used in appropriate combination. As the melting point raising substance, calcium carbonate, calcium hydroxide, calcium oxide, calcium phosphate, dolomite and the like can be used, and they can be used in the form of powder or particles. The addition amount of the melting point increasing substance can be appropriately determined, but is preferably 0.5 to 20% by weight with respect to the woody biomass raw material.

また、ガス化に際しては、炉６内に熱分解領域、燃焼領域およびガス化領域が形成される。そして、ガス化領域における固形物の嵩比重が低いと、（１）ガス化領域内におけるガス化可能な成分量がそもそも少ないこと、および（２）空隙に入り込む酸素量が多くなり燃焼が進行し易くなることに起因して、ガス発生量が少なくなる。よって、少なくともガス化領域における固形物の嵩比重が０．５以上、好ましくは０．５〜２．０となるようにするのも好ましい形態である。嵩比重を０．５以上とするために、ガス化炉６内にピストン等の圧縮装置（図示しない）を設け、炉６内の固形物を圧縮することもできるが、予め、木質バイオマスをペレット化、ブリケット化、押出成形、撹拌成形等により、嵩比重が０．５以上となるように圧縮加工しておき、これを原料として炉６内に投入する方が、容易であり好ましい。この場合、原料のサイズは直径６〜１２ｍｍ、長さ１０〜２０ｍｍとするのが好ましい。原料のサイズが小さすぎると、圧損増大やクリンカ（焼塊）の生成を引き起こすおそれがあり、反対に原料サイズが大きすぎると炉内にブリッジを発生するおそれがある。なお、このことからも明らかなように、本発明は、他のクリンカ発生防止技術と組み合わせて適用することができる。   Further, during gasification, a pyrolysis region, a combustion region, and a gasification region are formed in the furnace 6. If the bulk specific gravity of the solid in the gasification region is low, (1) the amount of components that can be gasified in the gasification region is small in the first place, and (2) the amount of oxygen that enters the gap increases and combustion proceeds. Due to the ease, the amount of gas generation is reduced. Therefore, it is also a preferable form that the bulk specific gravity of the solid substance at least in the gasification region is 0.5 or more, preferably 0.5 to 2.0. In order to set the bulk specific gravity to 0.5 or more, a compression device (not shown) such as a piston can be provided in the gasification furnace 6 to compress the solid matter in the furnace 6. It is easier and more preferable to perform compression processing so that the bulk specific gravity becomes 0.5 or more by forming, briquetting, extrusion molding, stirring molding, and the like, and putting this into the furnace 6 as a raw material. In this case, the size of the raw material is preferably 6 to 12 mm in diameter and 10 to 20 mm in length. If the size of the raw material is too small, there is a risk of increasing pressure loss and generating clinker (burned ingot). Conversely, if the raw material size is too large, a bridge may be generated in the furnace. As is apparent from this, the present invention can be applied in combination with other clinker generation prevention techniques.

他方、図示形態の設備では、ガス化炉６内の灰は底部の抜出口を介して排出される一方、ガス化炉６内で発生したガスは炉側部から抜き出され、サイクロン等からなる集塵機７に供給されてガス内に混入する灰が除去され、次いで燃料ガス冷却装置８において冷却された後、ガスエンジン９に供給され、燃料として使用される。ガスエンジン９には発電機１０が接続されており、発電がなされる。ガスエンジン９の排ガスは排ガス冷却装置１１で冷却され、大気に放出される。図示形態では、各冷却装置８，１１は間接熱交換器により構成されており、水等の冷却液が燃料ガス冷却装置８で燃料ガスの冷却に使用された後、ガスエンジン９の冷却液として用いられ、さらにその後、排ガス冷却装置１１で排ガスの冷却に使用されるようになっている。   On the other hand, in the facility shown in the figure, the ash in the gasification furnace 6 is discharged through the bottom outlet, while the gas generated in the gasification furnace 6 is extracted from the furnace side and is composed of a cyclone or the like. The ash that is supplied to the dust collector 7 and mixed in the gas is removed, and then cooled in the fuel gas cooling device 8, and then supplied to the gas engine 9 to be used as fuel. A generator 10 is connected to the gas engine 9 to generate power. The exhaust gas from the gas engine 9 is cooled by the exhaust gas cooling device 11 and released to the atmosphere. In the illustrated embodiment, each of the cooling devices 8 and 11 is configured by an indirect heat exchanger. After a coolant such as water is used for cooling the fuel gas by the fuel gas cooling device 8, the coolant is used as a coolant for the gas engine 9. After that, the exhaust gas cooling device 11 is used to cool the exhaust gas.

ダウンドラフト式固定床ガス化炉を用い、融点上昇物質の添加量及び添加位置を変化させてクリンカの発生を調べた。試験の結果は、表１に示すとおりであり、本発明に従って融点上昇物質を添加することにより、クリンカの発生を効果的に抑制できることが判明した。   Using a downdraft type fixed bed gasification furnace, the amount of melting point increasing substance and the addition position were changed, and the occurrence of clinker was examined. The results of the test are as shown in Table 1, and it was found that the generation of clinker can be effectively suppressed by adding the melting point increasing substance according to the present invention.

Figure 2008081638
Figure 2008081638

本発明は、木質バイオマスをガス化する限り、そのガスの用途に限定されるものではなく、上記例のような発電利用の他、燃料利用など、広範な用途に適用できるものである。   As long as the woody biomass is gasified, the present invention is not limited to the use of the gas, and can be applied to a wide range of uses such as the use of fuel as well as the use of power as in the above example.

ガス化発電設備例のフロー図である。It is a flowchart of the example of gasification power generation equipment. ガス化炉を概略的に示す縦断面図である。It is a longitudinal cross-sectional view which shows a gasification furnace roughly.

符号の説明Explanation of symbols

１…原料ピット、２…ピットクレーン、３…ホッパー、４…コンベヤ、５Ａ，５Ｂ…ダンパー、６…固定床ガス化炉、７…集塵装置、８…燃料ガス冷却装置、９…ガスエンジン、１０…発電機、１１…排ガス冷却装置。   DESCRIPTION OF SYMBOLS 1 ... Raw material pit, 2 ... Pit crane, 3 ... Hopper, 4 ... Conveyor, 5A, 5B ... Damper, 6 ... Fixed bed gasifier, 7 ... Dust collector, 8 ... Fuel gas cooling device, 9 ... Gas engine, 10 ... Generator, 11 ... Exhaust gas cooling device.

Claims (3)

木質バイオマスからなる原料をガス化炉に投入しガス化する方法において、
前記原料の融点を上昇させる作用を有する融点上昇物質をガス化炉内に存在させた状態でガス化を行うことを特徴とする木質バイオマスのガス化方法。 In the method of gasifying a raw material consisting of woody biomass into a gasifier,
A method for gasifying woody biomass, characterized in that gasification is performed in a state where a melting point-increasing substance having an action of increasing the melting point of the raw material is present in a gasification furnace. 前記融点上昇物質を前記原料とともに炉内に投入する、請求項１記載の木質バイオマスのガス化方法。   The method for gasifying woody biomass according to claim 1, wherein the melting point-increasing substance is introduced into the furnace together with the raw material. 前記ガス化炉は炉内に酸化剤を供給する吹込口を有するものであり、この吹込口を介して酸化剤とともに前記融点上昇物質を炉内に投入するか、あるいはこの吹込口近傍の高さ位置に設けた投入口を介して前記酸化剤とは別に前記融点上昇物質を炉内に投入する、請求項１または２記載の木質バイオマスのガス化方法。   The gasification furnace has a blow-in port for supplying an oxidant into the furnace, and the melting point raising substance is introduced into the furnace together with the oxidant through the blow-in port, or the height near the blow-in port. The method for gasifying woody biomass according to claim 1 or 2, wherein the melting point-increasing substance is introduced into the furnace separately from the oxidant through an inlet provided at a position.
JP2006264313A 2006-09-28 2006-09-28 Method for gasifying woody biomass Pending JP2008081638A (en)

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