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JP2007321520A - Use of heat generated at biomass power generation facilities - Google Patents

Use of heat generated at biomass power generation facilities Download PDF

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JP2007321520A
JP2007321520A JP2006155649A JP2006155649A JP2007321520A JP 2007321520 A JP2007321520 A JP 2007321520A JP 2006155649 A JP2006155649 A JP 2006155649A JP 2006155649 A JP2006155649 A JP 2006155649A JP 2007321520 A JP2007321520 A JP 2007321520A
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power generation
combustion
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combustion gas
air
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JP4825589B2 (en
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Mitsuharu Kagawa
光治 香川
Sumio Okamoto
澄雄 岡本
Hirochika Moriyasu
弘周 守安
Kazuhiro Yamada
和寛 山田
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Nikko Co Ltd
Nikko KK
Maeda Road Construction Co Ltd
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Nikko KK
Maeda Road Construction 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

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat using method generated in a biomass power generation facility, for reducing CO<SB>2</SB>, by reducing a fuel use quantity of a burner, by heating combustion air of the burner of an asphalt plant, by using high temperature combustion gas generated from the biomass power generation facility. <P>SOLUTION: The asphalt plant 27 is juxtaposed in the vicinity of the biomass power generation facility 1 for generating electric power, by supplying the high temperature combustion gas generated by burning generated combustible gas to a power generation boiler 14, by generating the combustible gas and carbide by pyrolyzing biomass by a gasification furnace 4. The CO<SB>2</SB>is reduced by reducing the fuel use quantity, by supplying high temperature clean air as combustion air of the burner 32 of a drier 28 arranged in the asphalt plant 27, by heating the clean air by exchanging heat between the clean air and the high temperature combustion gas generated by the biomass power generation facility 1, when operating the asphalt plant 27. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、バイオマス発電施設にて発生する高温の燃焼ガスの保有熱量を利用し、併設するアスファルトプラントのバーナの燃焼用空気を加熱するようにしたバイオマス発電施設にて発生する熱利用方法に関する。   The present invention relates to a method of using heat generated in a biomass power generation facility that uses the amount of heat stored in a high-temperature combustion gas generated in a biomass power generation facility and heats the combustion air of a burner in an adjacent asphalt plant.

最近、廃木材や間伐材などの木質系のバイオマスを適当なサイズに破砕・粉砕した後、これを例えば、間接加熱式のガス化炉にて無酸素或いは低酸素状態で熱分解することで水素やメタンなどを含んだ可燃性ガスと炭化物を生成し、生成した可燃性ガスを燃焼させ、その際に生じる高温の燃焼ガスを発電用ボイラに供給することで蒸気タービンを駆動させて発電を行うようにしたバイオマス発電施設が実用化されつつある。なお、生成された炭化物は、例えば、ガス化炉用の燃料としたり活性炭などとして有効利用されている（特許文献１）。   Recently, woody biomass such as waste wood and thinned wood is crushed and pulverized to an appropriate size, and then thermally decomposed in an oxygen-free or low-oxygen state in an indirect heating gasifier. It generates flammable gas and carbide containing methane and methane, burns the generated flammable gas, and supplies the high-temperature combustion gas generated at that time to the power generation boiler to drive the steam turbine to generate power Such biomass power generation facilities are being put into practical use. In addition, the produced | generated carbide | carbonized_material is used effectively as a fuel for gasifiers, activated carbon, etc. (patent document 1), for example.

ところで、アスファルトプラント工場においては、道路舗装材を製造する各種設備が設置されており、使用されるエネルギーは主として骨材加熱に使用されるＡ重油または都市ガスなどの化石燃料と、プラント稼働に使用される電力である。このアスファルトプラント工場においても地球温暖化防止のためのＣＯ２（二酸化炭素）の排出量抑制が命題となっており、ＣＯ２排出量を削減する義務がある。アスファルトプラントのＣＯ２排出量はアスファルト混合物生産量の原単位から概算すると、燃料で約２５ｋｇ−ＣＯ２／トン、電力で約５ｋｇ−ＣＯ２／トンであり、燃料によるＣＯ２排出量が大部分を占めている。 By the way, in the asphalt plant factory, various facilities for manufacturing road pavement materials are installed, and the energy used is mainly used for fossil fuels such as heavy oil A or city gas used for heating aggregates, and for plant operation. Power. Even in this asphalt plant factory, the suppression of CO 2 (carbon dioxide) emissions to prevent global warming is a proposition, and there is an obligation to reduce CO 2 emissions. When CO 2 emissions asphalt plant is estimated from intensity of the asphalt mixture production, about 25 kg-CO 2 / ton fuel, about 5 kg-CO 2 / ton power, CO 2 emissions from the fuel largely Accounted for.

現在、アスファルトプラントに使用されている燃料の発熱量から見た有効熱の効率は８０％程度であり、ドライヤの排ガス温度が１００〜１２０℃となっていてこれ以上に排ガス温度を下げることは結露の問題があり、加熱効率を高めることが限界に達していて抜本的なＣＯ２削減の方法は極めて困難な状況にある。
特開２００４−３３９３６０号公報 The efficiency of the effective heat seen from the calorific value of the fuel currently used in the asphalt plant is about 80%, and the exhaust gas temperature of the dryer is 100-120 ° C. There is a problem, and it is extremely difficult to drastically reduce the CO 2 by increasing the heating efficiency.
JP 2004-339360 A

そこで、本発明者らはバイオマス発電施設に着目し、バイオマス発電施設にて発電を行う際に発生する高温の燃焼ガスが有する高い保有熱量を利用し、アスファルトプラントのドライヤのバーナへ供給する燃焼用空気を予め加熱するようにすれば、バーナ燃焼時の燃料使用量を減らしてもバーナからの熱風温度を十分に維持することができ、ＣＯ２の削減が図れるのではないかと考えた。 Therefore, the present inventors pay attention to the biomass power generation facility, and use the high amount of heat possessed by the high-temperature combustion gas generated when generating power in the biomass power generation facility to supply to the burner of the asphalt plant dryer. It was thought that if the air was preheated, the hot air temperature from the burner could be sufficiently maintained even if the amount of fuel used during burner combustion was reduced, and CO 2 could be reduced.

本発明は上記の点に鑑み、バイオマス発電施設から発生する高温の燃焼ガスを利用してアスファルトプラントのバーナの燃焼用空気を加熱し、バーナの燃料使用量を減らしてＣＯ２の削減を図るようにしたバイオマス発電施設にて発生する熱利用方法を提供することを課題とする。 In view of the above, the present invention uses the high-temperature combustion gas generated from the biomass power generation facility to heat the combustion air for the burner of the asphalt plant, thereby reducing the fuel consumption of the burner and reducing CO 2. It is an object of the present invention to provide a method for using heat generated in a biomass power generation facility.

上記の課題を解決するために、請求項１記載のバイオマス発電施設にて発生する熱利用方法は、バイオマスをガス化炉にて熱分解して可燃性ガスと炭化物を生成し、生成した可燃性ガスを燃焼させて生じる高温の燃焼ガスを利用して発電を行うバイオマス発電施設と、アスファルト混合物を製造するアスファルトプラントとを併設し、アスファルトプラントの稼働時にはバイオマス発電施設にて発生する高温の燃焼ガスと清浄空気とを熱交換させて清浄空気を加熱し、高温となった清浄空気をアスファルトプラントに設置されるドライヤのバーナの燃焼用空気として供給するようにしたことを特徴としている。   In order to solve the above-mentioned problem, the heat utilization method generated in the biomass power generation facility according to claim 1 is a method in which the biomass is pyrolyzed in a gasification furnace to generate a combustible gas and a carbide, and the combustible gas generated. A biomass power generation facility that generates power using the high-temperature combustion gas generated by burning gas and an asphalt plant that produces asphalt mixture are combined, and the high-temperature combustion gas generated at the biomass power generation facility when the asphalt plant is in operation The clean air is heated to exchange heat with the clean air, and the high temperature clean air is supplied as combustion air for the burner of the dryer installed in the asphalt plant.

また、請求項２記載のバイオマス発電施設にて発生する熱利用方法は、アスファルトプラントの稼働時に、ガス化炉にて生成される炭化物を燃焼させて高温の燃焼ガスを発生させ、この燃焼ガスをガス化炉にて生成される可燃性ガスの燃焼により生じる燃焼ガスと合流させて燃焼ガスの保有熱量を高め、この燃焼ガスを利用してアスファルトプラントのバーナへ供給する燃焼用空気を加熱するようにしたことを特徴としている。   Moreover, the heat utilization method generated in the biomass power generation facility according to claim 2 is characterized in that when the asphalt plant is in operation, the carbide generated in the gasification furnace is burned to generate a high-temperature combustion gas, The combustion gas generated by the combustion of the combustible gas generated in the gasification furnace is combined to increase the amount of heat retained in the combustion gas, and the combustion air supplied to the burner of the asphalt plant is heated using this combustion gas. It is characterized by that.

また、請求項３記載のバイオマス発電施設にて発生する熱利用方法は、高温の燃焼用空気をアスファルトプラントのバーナに供給するときには、バーナ空気比を通常時よりも高めて燃焼用空気の保有熱量を有効利用するようにしたことを特徴としている。   The method of using heat generated in the biomass power generation facility according to claim 3 is characterized in that when high-temperature combustion air is supplied to a burner of an asphalt plant, the burner air ratio is increased from the normal time to increase the amount of heat retained in the combustion air. It is characterized by making effective use of.

以上のように本発明に係る請求項１記載のバイオマス発電施設にて発生する熱利用方法によれば、バイオマスをガス化炉にて熱分解して可燃性ガスと炭化物を生成し、生成した可燃性ガスを燃焼させて生じる高温の燃焼ガスを利用して発電を行うバイオマス発電施設と、アスファルト混合物を製造するアスファルトプラントとを併設し、アスファルトプラントの稼働時にはバイオマス発電施設にて発生する高温の燃焼ガスと清浄空気とを熱交換させて清浄空気を加熱し、高温となった清浄空気をアスファルトプラントに設置されるドライヤのバーナの燃焼用空気として供給するようにしたので、バイオマス発電施設にて発生する高温の燃焼ガスを利用してアスファルトプラントのバーナの燃焼用空気を予め加熱させることができ、バーナの燃料使用量を減らせてＣＯ２の削減を図ることができる。 As described above, according to the method of using heat generated in the biomass power generation facility according to claim 1 of the present invention, the biomass is pyrolyzed in the gasification furnace to generate the combustible gas and the carbide, and the generated combustible A biomass power generation facility that generates electricity using the high-temperature combustion gas generated by burning natural gas and an asphalt plant that produces an asphalt mixture, and the high-temperature combustion generated at the biomass power generation facility when the asphalt plant is in operation Heat is generated by exchanging heat between the gas and clean air, and the high temperature clean air is supplied as combustion air for dryer burners installed in asphalt plants. The combustion air of the burner of the asphalt plant can be preheated using the high-temperature combustion gas to be burned. It can be so reduce the amount of use achieved a reduction in CO 2.

また、請求項２記載のバイオマス発電施設にて発生する熱利用方法によれば、アスファルトプラントの稼働時に、ガス化炉にて生成される炭化物を燃焼させて高温の燃焼ガスを発生させ、この燃焼ガスをガス化炉にて生成される可燃性ガスの燃焼により生じる燃焼ガスと合流させて燃焼ガスの保有熱量を高め、この燃焼ガスを利用してアスファルトプラントのバーナへ供給する燃焼用空気を加熱するようにしたので、バイオマス発電施設における発電効率を低下させることなくアスファルトプラントのバーナの燃焼用空気を余裕を持って安定して加熱することができ、バーナの燃料使用量を減らせてＣＯ２の削減を図ることができる。 Further, according to the heat utilization method generated in the biomass power generation facility according to claim 2, during operation of the asphalt plant, the carbide generated in the gasification furnace is burned to generate high-temperature combustion gas, and this combustion The gas is combined with the combustion gas generated by the combustion of the combustible gas generated in the gasification furnace to increase the amount of heat retained by the combustion gas, and the combustion air supplied to the burner of the asphalt plant is heated using this combustion gas. since the as, with a margin for combustion air of asphalt plant burner without lowering the power generation efficiency of biomass power plants can be heated stably, the CO 2 by reduce the fuel consumption of the burner Reduction can be achieved.

また、請求項３記載のバイオマス発電施設にて発生する熱利用方法によれば、高温の燃焼用空気をアスファルトプラントのバーナに供給するときには、バーナ空気比を通常時よりも高めて燃焼用空気の保有熱量を有効利用するようにしたので、バーナの燃料使用量をより一層減少させてＣＯ２の削減を図ることができる。 Further, according to the method of using heat generated in the biomass power generation facility according to claim 3, when supplying high-temperature combustion air to the burner of the asphalt plant, the burner air ratio is set higher than usual so that the combustion air Since the retained heat amount is effectively used, the amount of fuel used by the burner can be further reduced to reduce CO 2 .

本発明のバイオマス発電施設にて発生する熱利用方法にあっては、バイオマス発電施設とアスファルトプラントとを並べて設置する。前記バイオマス発電施設は、例えば、廃木材や間伐材などの木質系のバイオマスを予め取り扱いやすい大きさに破砕処理する破砕機と、該破砕機にて破砕処理したバイオマスを無酸素または低酸素状態で熱分解処理して水素やメタンなどを豊富に含む可燃性ガスと炭化物とを生成するガス化炉と、該ガス化炉にて生成した可燃性ガスを燃焼させて高温（約１１００℃）の燃焼ガスを発生させるガス燃焼室と、ガス化炉にて生成した炭化物を粉砕処理する粉砕機と、該粉砕機にて粉砕処理した炭化物を一時的に貯留する炭化物貯留ホッパと、該炭化物貯留ホッパから供給される粉粒状の炭化物を燃焼させて可燃性ガスを燃焼させた場合と同程度の高温の燃焼ガスを発生させる炭化物燃焼室と、前記ガス燃焼室及び炭化物燃焼室から排出される高温の燃焼ガスが有する保有熱を利用して高温の蒸気を発生させる発電用ボイラと、該発電用ボイラにて発生させた蒸気にて駆動させて発電を行う蒸気タービンとを主体に構成している。   In the heat utilization method generated in the biomass power generation facility of the present invention, the biomass power generation facility and the asphalt plant are installed side by side. The biomass power generation facility includes, for example, a crusher that crushes woody biomass such as waste wood and thinned wood into a size that can be easily handled in advance, and the biomass that is crushed by the crusher in an oxygen-free or low-oxygen state. A gasification furnace that generates a combustible gas and carbide containing abundant hydrogen, methane, and the like by pyrolysis, and combustion of the combustible gas generated in the gasification furnace at a high temperature (about 1100 ° C.) A gas combustion chamber for generating gas, a pulverizer for pulverizing carbide generated in the gasification furnace, a carbide storage hopper for temporarily storing the carbide pulverized by the pulverizer, and the carbide storage hopper A carbide combustion chamber that generates combustion gas at a high temperature comparable to that when combustible gas is burned by burning the supplied granular carbide, and a high level of gas discharged from the gas combustion chamber and the carbide combustion chamber. Is composed mainly of a power generation boiler that generates high-temperature steam using the retained heat of the combustion gas and a steam turbine that is driven by the steam generated by the power generation boiler and generates power. .

また、前記ガス燃焼室と炭化物燃焼室にて発生する燃焼ガスを合流させてから発電用ボイラに供給する燃焼ガス供給ダクトには燃焼ガス分岐ダクトを分岐して配設すると共に、該燃焼ガス分岐ダクトには燃焼ガス分岐ダクト内を流下する高温の燃焼ガスと常温の清浄空気（外気）とを熱交換させ、清浄空気を所定温度、例えば５００〜６００℃程度まで加熱させる熱交換器を配設している。更に、前記熱交換器により高温とした清浄空気を併設したアスファルトプラントに設置されているドライヤのバーナに燃焼用空気として供給する燃焼用空気供給ダクトを配設している。   A combustion gas branch duct is branched from the combustion gas supply duct supplied to the power generation boiler after joining the combustion gas generated in the gas combustion chamber and the carbide combustion chamber, and the combustion gas branch The duct is equipped with a heat exchanger that exchanges heat between the high-temperature combustion gas flowing down the combustion gas branch duct and clean air (outside air) at normal temperature, and heats the clean air to a predetermined temperature, for example, about 500 to 600 ° C. is doing. Further, a combustion air supply duct is provided for supplying combustion air to a dryer burner installed in an asphalt plant provided with clean air heated to a high temperature by the heat exchanger.

そして、併設したアスファルトプラントが非稼働状態のときは、バイオマス発電施設においては破砕機で破砕処理したバイオマスをガス化炉へ定量供給し、熱分解して可燃性ガスと炭化物とを生成していき、このうち可燃性ガスはガス燃焼室で燃焼させ、その際に生じる高温の燃焼ガスを全て発電用ボイラへと供給して燃焼ガスが有する保有熱を専ら発電のためだけに利用する。このとき、ガス化炉にて生成される炭化物は順次粉砕処理をした後、燃焼させずに炭化物貯留ホッパへ貯留していく。   When the installed asphalt plant is not in operation, the biomass power generation facility supplies the biomass that has been crushed by the crusher to the gasifier and pyrolyzes it to produce flammable gases and carbides. Of these, the combustible gas is burned in the gas combustion chamber, and all the high-temperature combustion gas generated at that time is supplied to the power generation boiler, and the retained heat of the combustion gas is used exclusively for power generation. At this time, the carbides generated in the gasification furnace are sequentially pulverized and then stored in the carbide storage hopper without being burned.

一方、アスファルトプラントが稼動状態となると、それまで炭化物貯留ホッパに貯留してきた粉体状の炭化物を順次払い出して炭化物燃焼室へと供給して燃焼させ、その際に生じる高温の燃焼ガスを可燃性ガスを燃焼して生じる燃焼ガスに合流させ、燃焼ガスの総量を増大させて燃焼ガスの保有熱量を十分に高める。そして、ガス量の増大した燃焼ガスのうち、可燃性ガスの燃焼により生じる燃焼ガス量相当分、即ち発電に必要とされる燃焼ガス量分は発電用ボイラに供給して発電に利用する一方、炭化物の燃焼により生じる燃焼ガス量相当分、即ち発電には余剰な燃焼ガス量分は燃焼ガス分岐ダクト側へ導き、熱交換器にて常温の清浄空気と熱交換させて清浄空気を加熱昇温する。このとき、発電用ボイラには発電に必要とされる一定のガス量が変わらず供給されるため、発電用ボイラではガス量の急激な変動による負荷が掛かるおそれもなく安定した発電を行うことができる。   On the other hand, when the asphalt plant is in operation, the powdered carbides that have been stored in the carbide storage hopper are sequentially discharged and supplied to the carbide combustion chamber for combustion, and the high-temperature combustion gas generated at that time is combustible. The gas is combined with the combustion gas generated by burning the gas, and the total amount of the combustion gas is increased to sufficiently increase the retained heat amount of the combustion gas. And, among the combustion gas with increased gas amount, the amount corresponding to the amount of combustion gas generated by the combustion of combustible gas, that is, the amount of combustion gas required for power generation is supplied to the power generation boiler and used for power generation, The amount corresponding to the amount of combustion gas generated by the combustion of carbides, that is, the amount of combustion gas surplus for power generation, is led to the combustion gas branch duct side, and heat is exchanged with clean air at room temperature in a heat exchanger to heat the clean air to heat To do. At this time, since a constant amount of gas required for power generation is supplied to the power generation boiler without change, the power generation boiler can perform stable power generation without fear of being subjected to a load due to a sudden change in gas amount. it can.

そして、熱交換により高温とした清浄空気は、燃焼用空気供給ダクトを介して併設したアスファルトプラントのドライヤのバーナに供給し、バーナではこの高温の清浄空気を燃焼用空気として用いる。これによって、バーナからの熱風温度を低下させることなく燃料使用量を通常時よりも抑えた状態で燃焼することができる。また、このときバーナでは空気比を通常時よりも若干高め、例えば、通常１．３程度の空気比を１．７〜１．８程度として燃焼を行うように制御すれば、高温の燃焼用空気の有する保有熱量を有効利用でき、バーナの燃料使用量をより一層抑えられる。   Then, the clean air heated to a high temperature by heat exchange is supplied to the burner of the dryer of the asphalt plant provided along with the combustion air supply duct, and the hot air is used as the combustion air in the burner. As a result, combustion can be performed in a state where the amount of fuel used is less than normal without lowering the temperature of hot air from the burner. At this time, in the burner, if the combustion is controlled so that the air ratio is slightly higher than normal, for example, the air ratio is normally about 1.3 to about 1.8, the high-temperature combustion air Can effectively use the amount of heat held by the burner and further reduce the fuel consumption of the burner.

このように、バイオマス発電施設にて発生する高温の燃焼ガスの有する高い保有熱量を発電に支障がないように上手く利用し、アスファルトプラントのドライヤのバーナに供給する燃焼用空気を加熱昇温するようにしたので、ドライヤのバーナでは熱風温度を低下させることなく燃料使用量を抑えることができ、その結果、ＣＯ２の削減と燃料費の節約が可能となる。また、間欠運転の多いアスファルトプラントに比べてバイオマス発電施設は連続運転が多いため、アスファルトプラントの非稼働時にはガス化炉で生成される炭化物を燃焼させることなく貯留し続け、アスファルトプラント稼動時には貯留してきた炭化物を積極的に燃焼させてその燃焼ガスの保有熱を利用するようにしたことで、生成された炭化物も有効に利用できる。 In this way, the high amount of heat possessed by the high-temperature combustion gas generated in the biomass power generation facility is used effectively so as not to interfere with power generation, and the combustion air supplied to the burner of the asphalt plant dryer is heated and heated. Accordingly, the amount of fuel used can be suppressed without reducing the hot air temperature in the dryer burner, and as a result, CO 2 can be reduced and fuel costs can be saved. In addition, compared to asphalt plants with many intermittent operations, biomass power generation facilities have many continuous operations. The generated carbide can be used effectively by actively burning the obtained carbide and utilizing the retained heat of the combustion gas.

以下、本発明の実施例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図中の１はバイオマスを利用して発電を行うバイオマス発電施設であって、例えば、廃木材や間伐材などの木質系のバイオマスを回収して一時的に貯留しておくためのバイオマス貯留ホッパ２を配設していると共に、該バイオマス貯留ホッパ２の下流にはこのバイオマスを取り扱いやすいチップ状に破砕処理する破砕機３を配設している。   In the figure, reference numeral 1 denotes a biomass power generation facility that generates power using biomass. For example, a biomass storage hopper 2 for collecting and temporarily storing woody biomass such as waste wood and thinned wood. And a crusher 3 for crushing the biomass into chips that are easy to handle.

前記破砕機３の下流にはチップ状に破砕処理したバイオマスを無酸素または低酸素状態で熱分解処理し、可燃性ガスと炭化物とを生成するガス化炉４を配設している。前記ガス化炉４は間接加熱式のキルン構造をしており、外筒５と、該外筒５内に貫通させた円筒状の内筒６とから成る。前記外筒５は基台７に固定している一方、内筒６は基台７に回転自在に傾斜支持し、駆動装置（図示せず）にて所定の速度で回転させるようにしていると共に、後述するガス燃焼室１０にて発生させた高温（約１１００℃前後）の熱風を外筒５内に送り込むようにしており、前記破砕機３より払い出してスクリュコンベヤ８を介して内筒６内に順次投入するバイオマスを無酸素または低酸素状態で間接的に加熱していき、熱分解させて水素やメタン、一酸化炭素などを豊富に含んだ可燃性ガスと炭化物とを生成できるようにしている。   Downstream of the crusher 3, there is disposed a gasification furnace 4 that pyrolyzes the biomass crushed into chips into an oxygen-free or low-oxygen state to produce combustible gas and carbide. The gasification furnace 4 has an indirect heating kiln structure, and includes an outer cylinder 5 and a cylindrical inner cylinder 6 that penetrates the outer cylinder 5. While the outer cylinder 5 is fixed to the base 7, the inner cylinder 6 is inclined and supported rotatably on the base 7, and is rotated at a predetermined speed by a driving device (not shown). The high temperature (about 1100 ° C.) hot air generated in the gas combustion chamber 10 to be described later is sent into the outer cylinder 5, discharged from the crusher 3 and passed through the screw conveyor 8 to the inner cylinder 6. The biomass that is sequentially added to the plant is heated indirectly in an oxygen-free or low-oxygen state and is thermally decomposed to produce combustible gases and carbides rich in hydrogen, methane, carbon monoxide, etc. Yes.

９はガス化炉４にて生成した可燃性ガス中に含まれる粉塵を除塵処理するサイクロンであり、該サイクロン９の下流には除塵処理した可燃性ガスを燃焼させて高温（約１１００℃前後）の燃焼ガスを発生させるガス燃焼室１０を配設している。   9 is a cyclone that removes dust contained in the combustible gas generated in the gasification furnace 4, and the cyclone 9 is combusted with the combustible gas subjected to the dust removal treatment at a high temperature (about 1100 ° C.). A gas combustion chamber 10 for generating the combustion gas is disposed.

１１はガス化炉４にて生成した炭化物を粉砕処理する粉砕機であり、該粉砕機１１の下流には粉砕処理した炭化物を貯留しておく炭化物貯留ホッパ１２を配設していると共に、該炭化物貯留ホッパ１２の下流には炭化物貯留ホッパ１２から払い出して供給する粉粒状の炭化物を燃焼させ、前記可燃性ガスを燃焼させた場合と同程度の高温（約１１００℃前後）の燃焼ガスを発生させる炭化物燃焼室１３を配設している。   11 is a pulverizer for pulverizing the carbide generated in the gasification furnace 4, and a carbide storage hopper 12 for storing the pulverized carbide is disposed downstream of the pulverizer 11. Downstream of the carbide storage hopper 12, the particulate carbide discharged and supplied from the carbide storage hopper 12 is combusted to generate combustion gas at a high temperature (about 1100 ° C.) similar to the case where the combustible gas is combusted. A carbide combustion chamber 13 is disposed.

１４は発電用ボイラであって、前記ガス燃焼室１０と炭化物燃焼室１３にて発生させた高温の燃焼ガスを燃焼ガス供給ダクト１５を介して一旦合流させてから前記発電用ボイラ１４に供給し、燃焼ガスが有する保有熱を利用して高温の蒸気を発生させるようにしていると共に、この高温の蒸気にて駆動させて発電を行う蒸気タービン１６を備えている。   Reference numeral 14 denotes a power generation boiler which once joins the high-temperature combustion gas generated in the gas combustion chamber 10 and the carbide combustion chamber 13 via the combustion gas supply duct 15 and then supplies the combined gas to the power generation boiler 14. The steam turbine 16 is configured to generate high-temperature steam by using the retained heat of the combustion gas and to generate electric power by being driven by the high-temperature steam.

１７は前記発電用ボイラ１４から排出される排ガスを導出する排気ダクトであって、その途中には排ガス温度を低下させる減温塔１８や、排ガス中の粉塵を除塵処理するバグフィルタ１９、排ガスに対して散水を行って排ガス中の灰分やタール分などのダストを除去処理する洗煙塔２０、及び排ガスに対してアンモニアを噴霧して排ガス中の窒素酸化物を除去処理する脱硝反応塔２１などの各種排ガス処理装置を介在させており、排気ダクト１７終端側に備えた排風機２２にて排ガスを吸引して前記各種排ガス処理装置を経由させて清浄化してから煙突２３より大気中に放出するようにしている。   Reference numeral 17 denotes an exhaust duct for deriving exhaust gas discharged from the power generation boiler 14. In the middle of the exhaust duct, a temperature reducing tower 18 for reducing the exhaust gas temperature, a bag filter 19 for removing dust in the exhaust gas, and exhaust gas are used. A smoke washing tower 20 for removing dust such as ash and tar in exhaust gas by spraying water, a denitration reaction tower 21 for removing nitrogen oxides in exhaust gas by spraying ammonia on the exhaust gas, and the like The exhaust gas treatment device is interposed, and exhaust gas is sucked by the exhaust fan 22 provided at the end side of the exhaust duct 17, purified through the various exhaust gas treatment devices, and then discharged from the chimney 23 to the atmosphere. I am doing so.

また、前記発電用ボイラ１４へ燃焼ガスを供給する燃焼ガス供給ダクト１５の途中には、燃焼ガス供給ダクト１５内を流下する燃焼ガスの一部を分流させて前記ガス化炉４の外筒５内に熱源として供給すると共に、外筒５から排気される燃焼ガスをガス燃焼室１０へ再び戻して循環させる燃焼ガス循環ダクト２４を配管しており、発電用の高温の燃焼ガスの一部をガス化炉４におけるバイオマスの熱分解用の熱源として無駄なく利用するようにしている。   Further, in the middle of the combustion gas supply duct 15 for supplying the combustion gas to the power generation boiler 14, a part of the combustion gas flowing down in the combustion gas supply duct 15 is shunted so that the outer cylinder 5 of the gasification furnace 4. A combustion gas circulation duct 24 for supplying the combustion gas exhausted from the outer cylinder 5 back to the gas combustion chamber 10 and circulating it again is circulated, and a part of the high-temperature combustion gas for power generation is supplied. It is used without waste as a heat source for the thermal decomposition of biomass in the gasification furnace 4.

更に、前記燃焼ガス供給ダクト１５の途中には燃焼ガス分岐ダクト２５を連結していると共に、該燃焼ガス分岐ダクト２５の途中には燃焼ガス分岐ダクト２５側へ流下した高温の燃焼ガスと常温の清浄空気（外気）とを熱交換させる熱交換器２６を配設しており、清浄空気を加熱昇温させるようにしている。また、前記燃焼ガス分岐ダクト２５の他端部は発電用ボイラ１４下流側の排気ダクト１７に連結しており、熱交換によって温度の低下した燃焼ガスを発電用ボイラ１４から排出される排ガスと合流させるようにしている。   Further, a combustion gas branch duct 25 is connected in the middle of the combustion gas supply duct 15, and a high temperature combustion gas that has flowed down to the combustion gas branch duct 25 side and a normal temperature of the combustion gas branch duct 25. A heat exchanger 26 for exchanging heat with clean air (outside air) is provided to heat and raise the temperature of the clean air. The other end of the combustion gas branch duct 25 is connected to the exhaust duct 17 on the downstream side of the power generation boiler 14, and the combustion gas whose temperature has decreased due to heat exchange merges with the exhaust gas discharged from the power generation boiler 14. I try to let them.

上記バイオマス発電施設１の近傍にはアスファルト混合物を製造するアスファルトプラント２７を併設している。２８は前記アスファルトプラント２７に設置される骨材加熱用のドライヤであって、内周部に多数の掻き上げ羽根（図示せず）を周設した円筒状のドラム２９を基台３０上に回転自在に傾斜支持し、駆動装置（図示せず）により所定の速度で回転させるようにしており、ドラム２９の一端部のホットホッパ３１に配設したバーナ３２よりドラム２９内に熱風を送り込む一方、他端部のコールドホッパ３３に連結した排気煙道３４の末端に配設した排風機３５にて排ガスを吸引してドラム２９内を通過する高温ガス流を維持すると共に、集塵機３６を経由させて清浄化した排ガスを煙突３７より大気中へ放出している。   In the vicinity of the biomass power generation facility 1, an asphalt plant 27 for producing an asphalt mixture is provided. Reference numeral 28 denotes an aggregate heating dryer installed in the asphalt plant 27, and a cylindrical drum 29 having a large number of scraping blades (not shown) around the inner periphery is rotated on a base 30. The drum 29 is freely tilted and is rotated at a predetermined speed by a driving device (not shown), and hot air is sent into the drum 29 from a burner 32 disposed on the hot hopper 31 at one end of the drum 29. The exhaust gas is sucked by the exhaust fan 35 disposed at the end of the exhaust flue 34 connected to the cold hopper 33 at the other end to maintain the high-temperature gas flow passing through the drum 29 and through the dust collector 36. Purified exhaust gas is discharged from the chimney 37 into the atmosphere.

そして、粒度別に骨材を貯蔵している骨材ホッパ群（図示せず）から骨材を所定量ずつ払い出し、払い出した骨材をベルトコンベヤ３８を介してドラム２９内に送り込み、掻き上げ羽根で掻き上げながらドラム２９内を転動流下させる間に高温ガス流と接触させ、所望温度まで昇温させてホットホッパ３１に配設した排出部３９から排出している。   Then, a predetermined amount of aggregate is discharged from an aggregate hopper group (not shown) storing aggregates according to particle size, and the discharged aggregate is fed into the drum 29 via the belt conveyor 38, and is scraped with a scraping blade. While being rolled up, the drum 29 is brought into contact with a high-temperature gas flow while being tumbled down, heated to a desired temperature, and discharged from a discharge portion 39 disposed in the hot hopper 31.

ドラム２９より排出された加熱骨材は垂直搬送装置であるバケットエレベータ４０によってプラント本体４１上部まで持ち上げられ、バケットエレベータ４０の排出シュート４２を滑り落ちてプラント本体４１最上部の振動篩４３に流れ込み、ここで粒度別に篩い分けられて骨材貯蔵ビン４４の各区画室に貯蔵される。   The heated aggregate discharged from the drum 29 is lifted up to the upper part of the plant main body 41 by the bucket elevator 40 which is a vertical conveying device, slides down the discharge chute 42 of the bucket elevator 40 and flows into the vibration sieve 43 at the top of the plant main body 41, Here, it is sieved according to the particle size and stored in each compartment of the aggregate storage bin 44.

骨材貯蔵ビン４４の各区画室の下端にはそれぞれ骨材排出用の排出ゲート（図示せず）を備えており、その下位には重量検出器にて支持する骨材計量槽４５を配設すると共に、石粉貯蔵ビン４６のスクリューフィーダ４７にて供給される石粉を計量する石粉計量槽４８、アスファルトを計量するアスファルト計量槽４９を配設し、更にその下位にはミキサ５０を配設しており、所定量の各材料を上記各計量槽にて計量し、ミキサ５０にて混合調整して所望のアスファルト混合物を製造している。   The aggregate storage bin 44 has a discharge gate (not shown) for discharging the aggregate at the lower end of each compartment, and an aggregate measuring tank 45 supported by a weight detector is disposed below the discharge gate. In addition, a stone powder measuring tank 48 for measuring the stone powder supplied by the screw feeder 47 of the stone powder storage bin 46 and an asphalt measuring tank 49 for measuring asphalt are disposed, and a mixer 50 is disposed at a lower level. A predetermined amount of each material is weighed in each of the weighing tanks and mixed and adjusted by the mixer 50 to produce a desired asphalt mixture.

５１はバイオマス発電施設１側からアスファルトプラント２７側へバーナ３２の燃焼用空気を供給する燃焼用空気供給ダクトであって、その一端部をバイオマス発電施設１の燃焼ガス分岐ダクト２５に介した熱交換器２６に連結していると共に、他端部をアスファルトプラント２７に設置されるドライヤ２８のバーナ３２に連結しており、空気供給用ファン５２にて外部から取り込んだ常温の清浄空気（外気）と燃焼ガス分岐ダクト２５内を流下する高温（約１１００℃前後）の燃焼ガスとを熱交換器２６により熱交換させ、清浄空気を約５００〜６００℃程度まで昇温させてから排風機５３により燃焼用空気供給ダクト５１を介してバーナ３２へと供給するようにしている。   Reference numeral 51 denotes a combustion air supply duct for supplying combustion air for the burner 32 from the biomass power generation facility 1 side to the asphalt plant 27 side, and one end thereof is heat exchanged via the combustion gas branch duct 25 of the biomass power generation facility 1. The other end is connected to the burner 32 of the dryer 28 installed in the asphalt plant 27, and clean air (outside air) at room temperature taken in from the outside by the air supply fan 52. Heat exchange with the high-temperature (about 1100 ° C.) combustion gas flowing down in the combustion gas branch duct 25 is performed by the heat exchanger 26, and the clean air is heated to about 500 to 600 ° C. and then burned by the exhaust fan 53. The air is supplied to the burner 32 through the air supply duct 51.

そして、バーナ３２では供給されてくる高温の清浄空気を燃焼用空気として用いることにより、熱風温度を低下させることなく燃料使用量を通常時よりも抑えた状態で燃焼を行えるようにしている。   In the burner 32, the high-temperature clean air supplied is used as combustion air, so that combustion can be performed in a state where the amount of fuel used is lower than normal without lowering the hot air temperature.

また、このときバーナ３２では空気比を通常時よりも若干高めて、例えば、通常１．３程度としている空気比を１．７〜１．８程度（より好ましくは１．７７）まで高めて燃焼を行うように制御すれば、高温の燃焼用空気が有する保有熱量を有効に利用できてバーナ３２の燃料使用量をより一層抑えることができる。   At this time, the burner 32 burns with an air ratio slightly higher than normal, for example, with the air ratio normally set to about 1.3 being increased to about 1.7 to 1.8 (more preferably 1.77). If the control is performed, the amount of heat held by the high-temperature combustion air can be used effectively, and the amount of fuel used by the burner 32 can be further suppressed.

また、前記燃焼用空気供給ダクト５１の途中には、外気をダクト内に導入させるための外気導入口５４を常時開放状態として備えており、例えば、バイオマス発電施設１側が運転停止時、或いは運転開始直後などで、十分な量の燃焼用空気を送ることができないような場合でも前記外気導入口５４よりダクト内に外気を適宜導入させ、アスファルトプラント２７のバーナ３２へ供給する燃焼用空気量を安定して確保できるようにしている。   In addition, the combustion air supply duct 51 is provided with an outside air introduction port 54 for constantly introducing outside air into the duct in an open state. For example, when the biomass power generation facility 1 is stopped or started Even when a sufficient amount of combustion air cannot be sent immediately after, for example, the outside air is appropriately introduced into the duct through the outside air inlet 54, and the amount of combustion air supplied to the burner 32 of the asphalt plant 27 is stabilized. So that it can be secured.

５５は燃焼用空気供給ダクト５１内を流下する燃焼用空気を外部へ緊急放出するための緊急放出口であって、遮断ダンパー５６によって開閉自在としている。そして、通常時は閉鎖している一方、例えば、燃焼用空気供給中にアスファルトプラント２７の稼動が止まってバーナ３２の燃焼を停止したような場合には、行き場を失った燃焼用空気の圧によって発電用ボイラ１４に負荷が掛かりかねないため、このようなときには前記遮断ダンパー５６を開放させてダクト内の燃焼用空気を緊急放出できるようにしている。   55 is an emergency discharge port for urgently discharging the combustion air flowing down in the combustion air supply duct 51 to the outside, and can be opened and closed by a shut-off damper 56. For example, when the operation of the asphalt plant 27 stops during combustion air supply and the combustion of the burner 32 is stopped while the combustion air is being supplied, the combustion air pressure is lost due to the loss of the place of combustion. Since a load may be applied to the power generation boiler 14, the shut-off damper 56 is opened in such a case so that the combustion air in the duct can be discharged urgently.

５７は燃焼用空気供給ダクト５１の途中から分岐させてドライヤ２８のホットホッパ３１に連結した熱風供給ダクトであって、その途中に開度調整自在とした熱風ダンパー５８を備えており、前記したように、バーナ３２の空気比を通常時よりも高めた場合にはバーナ３２への空気量が多くなり過ぎて良好な燃焼が維持できなくなるおそれがあるため、例えば、通常時の空気比１．３相当分の清浄空気はそのまま燃焼用空気としてバーナ３２に供給する一方、残りの空気比０．４〜０．５相当分の清浄空気は熱風供給ダクト５７を介して熱風空気としてドライヤ２８内に供給させ、両方を合わせて空気比１．７〜１．８を実現するようにしている。なお、空気比１．７〜１．８程度でバーナ３２の燃焼を行っても良好な燃焼が維持できるようであれば、前記熱風供給ダクト５７は必ずしも備える必要はない。   A hot air supply duct 57 is branched from the middle of the combustion air supply duct 51 and connected to the hot hopper 31 of the dryer 28. The hot air damper 58 is provided with a hot air damper 58 whose opening is adjustable in the middle of the duct. In addition, when the air ratio of the burner 32 is increased from the normal time, the amount of air to the burner 32 may increase so that good combustion cannot be maintained. A considerable amount of clean air is supplied as it is to the burner 32 as combustion air, while the remaining clean air equivalent to 0.4 to 0.5 is supplied into the dryer 28 as hot air through the hot air supply duct 57. Both are combined to achieve an air ratio of 1.7 to 1.8. The hot air supply duct 57 is not necessarily provided as long as good combustion can be maintained even when the burner 32 is burned at an air ratio of about 1.7 to 1.8.

次に、上記構成のバイオマス発電施設１にて発生する熱利用方法について説明する。先ず、アスファルトプラント２７が非稼働状態のときは、バイオマス発電施設１のバイオマス貯留ホッパ２に貯留していた廃木材や間伐材などのバイオマスを破砕機３に供給し、取り扱いやすいようにチップ状に破砕処理する。そして、ガス化炉４の外筒５内に高温の燃焼ガスを送り込みながら、チップ状のバイオマスをガス化炉４の内筒６内に定量供給していき、バイオマスを無酸素、或いは低酸素状態にて間接加熱して熱分解させ、水素やメタンなどを豊富に含んだ可燃性ガスと炭化物を生成していく。そして、生成した可燃性ガスはガス燃焼室１０にて燃焼させ、その際に生じる高温の燃焼ガスを全て発電用ボイラ１４へ供給し、発生する高温の蒸気にて蒸気タービン１６を駆動して発電を行う。また、生成した炭化物は粉砕機１１にて逐次粉砕処理した後、燃焼させることなく炭化物貯留ホッパ１２へ貯留していく。   Next, a method for utilizing heat generated in the biomass power generation facility 1 having the above configuration will be described. First, when the asphalt plant 27 is not in operation, biomass such as waste wood and thinned wood stored in the biomass storage hopper 2 of the biomass power generation facility 1 is supplied to the crusher 3 and is chipped for easy handling. Crush it. Then, while supplying high-temperature combustion gas into the outer cylinder 5 of the gasification furnace 4, chip-shaped biomass is quantitatively supplied into the inner cylinder 6 of the gasification furnace 4, and the biomass is in an oxygen-free or low-oxygen state. Indirect heating and pyrolysis to produce flammable gas and carbide containing abundant hydrogen and methane. The generated combustible gas is combusted in the gas combustion chamber 10, and all the high-temperature combustion gas generated at that time is supplied to the power generation boiler 14, and the steam turbine 16 is driven by the generated high-temperature steam to generate power. I do. Further, the generated carbide is sequentially pulverized by the pulverizer 11 and then stored in the carbide storage hopper 12 without burning.

そして、アスファルトプラント２７が稼動状態となると、それまで炭化物貯留ホッパ１２に貯留してきた炭化物を炭化物燃焼室１３へ定量供給して燃焼させ、その際に生じる高温の燃焼ガスを、可燃性ガスを燃焼させて生じる燃焼ガスに合流させることにより、燃焼ガスの総量を増大させて燃焼ガスが有する保有熱量を十分に高める。そして、ガス量の増大した燃焼ガスのうち、可燃性ガスの燃焼により生じる燃焼ガス量相当分、即ち発電に必要とされる燃焼ガス量分は発電用ボイラ１４に供給して発電に利用する一方、炭化物の燃焼により生じる燃焼ガス量相当分、即ち発電には余剰な燃焼ガス量分は燃焼ガス分岐ダクト２５側へ導き、この高温の燃焼ガスと常温の清浄空気(外気）とを熱交換器２６にて熱交換させて清浄空気を加熱昇温する。このとき、発電用ボイラ１４には発電に必要とされる一定の燃焼ガス量が変わらずに供給され続けるため、発電用ボイラ１４ではガス量の急激な変動による負荷が掛かるおそれもなく安定した発電を行うことができる。   Then, when the asphalt plant 27 is in an operating state, the carbide that has been stored in the carbide storage hopper 12 is quantitatively supplied to the carbide combustion chamber 13 for combustion, and the high-temperature combustion gas generated at that time is combusted with combustible gas. The total amount of the combustion gas is increased by joining the combustion gas generated in this manner, and the retained heat amount of the combustion gas is sufficiently increased. The combustion gas corresponding to the amount of combustion gas generated by the combustion of the combustible gas, that is, the amount of combustion gas required for power generation, is supplied to the power generation boiler 14 and used for power generation. The amount corresponding to the amount of combustion gas generated by the combustion of carbide, that is, the amount of combustion gas surplus for power generation, is led to the combustion gas branch duct 25 side, and this high-temperature combustion gas and normal temperature clean air (outside air) are converted into a heat exchanger. Heat exchange is performed at 26 to heat the clean air. At this time, since a constant amount of combustion gas required for power generation is continuously supplied to the power generation boiler 14, the power generation boiler 14 can stably generate power without being subjected to a load due to a sudden change in the gas amount. It can be performed.

そして、高温とした清浄空気を燃焼用空気供給ダクト５１を介してアスファルトプラント２７のドライヤ２８のバーナ３２に供給し、バーナ３２ではこの高温の清浄空気を燃焼用空気として用いることにより熱風温度を低下させることなく燃料使用量を抑えた状態で燃焼を行っていくことができる。   The high temperature clean air is supplied to the burner 32 of the dryer 28 of the asphalt plant 27 through the combustion air supply duct 51, and the hot air temperature is lowered in the burner 32 by using this high temperature clean air as the combustion air. Combustion can be performed in a state in which the amount of fuel used is suppressed without causing it.

このように、バイオマス発電施設１にて発生する高温の燃焼ガスが有する高い保有熱量を発電には支障がないように利用し、併設したアスファルトプラント２７のドライヤ２８のバーナ３２に供給する燃焼用空気を高温に加熱昇温するようにしたので、ドライヤ２８のバーナ３２では熱風温度を低下させることなく燃料使用量を抑えた燃焼が可能となり、ＣＯ２の排出量の削減と共に燃費も節約できる。また、アスファルトプラント２７の非稼働時にはバイオマス発電施設１のガス化炉４で生成される炭化物を燃焼させることなく貯留し続ける一方、アスファルトプラント２７稼動時になればそれまで貯留してきた炭化物を積極的に燃焼させて使用するので、生成する炭化物も有効に利用できる。 In this way, the combustion heat supplied to the burner 32 of the dryer 28 of the attached asphalt plant 27 by using the high stored heat amount of the high-temperature combustion gas generated in the biomass power generation facility 1 so as not to hinder the power generation. Thus, the burner 32 of the dryer 28 can perform combustion while suppressing the amount of fuel used without lowering the hot air temperature, thereby reducing CO 2 emissions and saving fuel consumption. Further, while the asphalt plant 27 is not in operation, the carbide generated in the gasification furnace 4 of the biomass power generation facility 1 is continuously stored without being burned. Since it is used after being burned, the generated carbide can be used effectively.

なお、本実施例においてはアスファルトプラント２７が非稼働時にはバイオマス発電施設１では炭化物を燃焼させずに貯留のみ行うようにしているが、例えば、発電量を増加させたいときなど必要に応じて適宜炭化物を燃焼させて燃焼ガス量を増加させるようにしても良い。   In the present embodiment, when the asphalt plant 27 is not in operation, the biomass power generation facility 1 performs only storage without burning the carbide. However, for example, when it is desired to increase the power generation amount, the carbide is appropriately selected. May be burned to increase the amount of combustion gas.

また、バーナ３２に高温の燃焼用空気を供給する場合、空気比を通常時よりも高めて、例えば、通常１．３程度の空気比を１．７〜１．８程度まで高めて燃焼を行うように制御すれば、高温の燃焼用空気が有する保有熱量を有効利用できてバーナ３２の燃料使用量をより一層抑えることができて好ましい。因みに、本発明者らが行った試算によれば、本発明を採用することによりアスファルトプラントにおける燃料使用量を約２０％程度削減することができる。   In addition, when supplying high-temperature combustion air to the burner 32, combustion is performed by increasing the air ratio from the normal time, for example, by increasing the air ratio from about 1.3 to about 1.7 to 1.8. Such control is preferable because the amount of heat held by the high-temperature combustion air can be effectively used and the amount of fuel used by the burner 32 can be further suppressed. Incidentally, according to a trial calculation conducted by the present inventors, the amount of fuel used in the asphalt plant can be reduced by about 20% by adopting the present invention.

また、本実施例においては、バイオマス発電施設１に新規骨材を加熱するドライヤを備えたアスファルトプラントを併設した例で説明したが、何らこれに限定するものでなく、アスファルト舗装廃材を加熱する廃材再生用ドライヤも併設しておれば、廃材再生用ドライヤのバーナにも高温の燃焼用空気を供給して熱の有効利用を図れることは勿論のことである。   Moreover, in the present Example, although the example which provided the asphalt plant provided with the dryer which heats a new aggregate in the biomass power generation facility 1 demonstrated, it is not limited to this at all, The waste material which heats asphalt pavement waste material If a regeneration dryer is also provided, it goes without saying that high-temperature combustion air can be supplied to the burner of the waste material regeneration dryer to effectively use the heat.

本発明に係る、バイオマス発電施設にて発生する熱利用方法の一実施例を示す説明図である。It is explanatory drawing which shows one Example of the heat utilization method which generate | occur | produces in biomass power generation facilities based on this invention.

符号の説明Explanation of symbols

１…バイオマス発電施設 ４…ガス化炉
１０…ガス燃焼室 １１…粉砕機
１２…炭化物貯留ホッパ １３…炭化物燃焼室
１４…発電用ボイラ １５…燃焼ガス供給ダクト
１６…蒸気タービン ２５…燃焼ガス分岐ダクト
２６…熱交換器 ２７…アスファルトプラント
２８…ドライヤ ３２…バーナ
４１…プラント本体 ５１…燃焼用空気供給ダクト
５７…熱風供給ダクト DESCRIPTION OF SYMBOLS 1 ... Biomass power generation facility 4 ... Gasification furnace 10 ... Gas combustion chamber 11 ... Crusher 12 ... Carbide storage hopper 13 ... Carbide combustion chamber 14 ... Power generation boiler 15 ... Combustion gas supply duct 16 ... Steam turbine 25 ... Combustion gas branch duct DESCRIPTION OF SYMBOLS 26 ... Heat exchanger 27 ... Asphalt plant 28 ... Dryer 32 ... Burner 41 ... Plant main body 51 ... Air supply duct for combustion 57 ... Hot air supply duct

Claims (3)

バイオマスをガス化炉にて熱分解して可燃性ガスと炭化物を生成し、生成した可燃性ガスを燃焼させて生じる高温の燃焼ガスを利用して発電を行うバイオマス発電施設と、アスファルト混合物を製造するアスファルトプラントとを併設し、アスファルトプラントの稼働時にはバイオマス発電施設にて発生する高温の燃焼ガスと清浄空気とを熱交換させて清浄空気を加熱し、高温となった清浄空気をアスファルトプラントに設置されるドライヤのバーナの燃焼用空気として供給するようにしたことを特徴とするバイオマス発電施設にて発生する熱利用方法。   Biomass is pyrolyzed in a gasification furnace to produce combustible gases and carbides, and a biomass power generation facility that generates electricity using the high-temperature combustion gas generated by burning the generated combustible gases and manufactures asphalt mixtures The asphalt plant is installed in the asphalt plant, and when the asphalt plant is in operation, the high-temperature combustion gas generated in the biomass power generation facility and the clean air are heat-exchanged to heat the clean air and the hot clean air is installed in the asphalt plant. A method for using heat generated in a biomass power generation facility, characterized in that it is supplied as combustion air for a burner of a dryer. アスファルトプラントの稼働時に、ガス化炉にて生成される炭化物を燃焼させて高温の燃焼ガスを発生させ、この燃焼ガスをガス化炉にて生成される可燃性ガスの燃焼により生じる燃焼ガスと合流させて燃焼ガスの保有熱量を高め、この燃焼ガスを利用してアスファルトプラントのバーナへ供給する燃焼用空気を加熱するようにしたことを特徴とすると請求項１記載のバイオマス発電施設にて発生する熱利用方法。   During operation of the asphalt plant, the carbide generated in the gasification furnace is burned to generate high-temperature combustion gas, and this combustion gas is combined with the combustion gas generated by the combustion of the combustible gas generated in the gasification furnace When the combustion air supplied to the burner of the asphalt plant is heated by using the combustion gas to increase the amount of heat held by the combustion gas, it is generated in the biomass power generation facility according to claim 1. Heat utilization method. 高温の燃焼用空気をアスファルトプラントのバーナに供給するときには、バーナ空気比を通常時よりも高めて燃焼用空気の保有熱量を有効利用するようにしたことを特徴とする請求項１または２記載のバイオマス発電施設にて発生する熱利用方法。   3. When supplying high-temperature combustion air to a burner of an asphalt plant, the burner air ratio is made higher than usual to effectively use the amount of heat retained in the combustion air. A method of using heat generated at biomass power generation facilities.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010116672A (en) * 2008-11-11 2010-05-27 Maeda Road Constr Co Ltd Asphalt plant utilizing heat generated in biomass power generation facilities and aggregate heating and drying method
JP2011252666A (en) * 2010-06-03 2011-12-15 Maeda Road Constr Co Ltd Burner device, combustion method of burner, and control memory for the same
CN102817647A (en) * 2011-06-07 2012-12-12 靖江万泰机械制造有限公司 Biomass generator
CN103551361A (en) * 2013-10-30 2014-02-05 德阳东星机械制造有限公司 System for power generation by utilizing thermal decomposition gas of domestic garbage
WO2016023412A1 (en) * 2014-08-12 2016-02-18 余式正 Vertical negative pressure garbage dry-distillation incinerator free of dioxin-production and waste gas emission
CN109621570A (en) * 2019-01-24 2019-04-16 福建铁拓机械有限公司 A kind of asphalt mixture heat regeneration exhaust gas processing device and method
CN111589844A (en) * 2020-05-29 2020-08-28 北京云水浩瑞环境科技有限公司 System and method for disposal of domestic waste

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06200502A (en) * 1992-12-28 1994-07-19 Nobuaki Debari Apparatus for manufacturing asphalt composite material and manufacture
JP2001241624A (en) * 2000-02-25 2001-09-07 Nkk Design & Engineering Corp Waste-incinerating plant
JP2003171909A (en) * 2001-12-07 2003-06-20 Nikko Co Ltd Asphalt plant using exhaust gas of carbonizing device
JP2004339360A (en) * 2003-05-15 2004-12-02 Mitsubishi Heavy Ind Ltd Method and system for treating biomass and fluid fuel obtained by the method
JP2005112956A (en) * 2003-10-06 2005-04-28 Nippon Steel Corp Gasification method for biomass
JP2007127330A (en) * 2005-11-02 2007-05-24 Mitsubishi Heavy Ind Ltd Method and system for cogeneration with a carbonization furnace

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06200502A (en) * 1992-12-28 1994-07-19 Nobuaki Debari Apparatus for manufacturing asphalt composite material and manufacture
JP2001241624A (en) * 2000-02-25 2001-09-07 Nkk Design & Engineering Corp Waste-incinerating plant
JP2003171909A (en) * 2001-12-07 2003-06-20 Nikko Co Ltd Asphalt plant using exhaust gas of carbonizing device
JP2004339360A (en) * 2003-05-15 2004-12-02 Mitsubishi Heavy Ind Ltd Method and system for treating biomass and fluid fuel obtained by the method
JP2005112956A (en) * 2003-10-06 2005-04-28 Nippon Steel Corp Gasification method for biomass
JP2007127330A (en) * 2005-11-02 2007-05-24 Mitsubishi Heavy Ind Ltd Method and system for cogeneration with a carbonization furnace

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010116672A (en) * 2008-11-11 2010-05-27 Maeda Road Constr Co Ltd Asphalt plant utilizing heat generated in biomass power generation facilities and aggregate heating and drying method
JP2011252666A (en) * 2010-06-03 2011-12-15 Maeda Road Constr Co Ltd Burner device, combustion method of burner, and control memory for the same
CN102817647A (en) * 2011-06-07 2012-12-12 靖江万泰机械制造有限公司 Biomass generator
CN103551361A (en) * 2013-10-30 2014-02-05 德阳东星机械制造有限公司 System for power generation by utilizing thermal decomposition gas of domestic garbage
WO2016023412A1 (en) * 2014-08-12 2016-02-18 余式正 Vertical negative pressure garbage dry-distillation incinerator free of dioxin-production and waste gas emission
CN109621570A (en) * 2019-01-24 2019-04-16 福建铁拓机械有限公司 A kind of asphalt mixture heat regeneration exhaust gas processing device and method
CN111589844A (en) * 2020-05-29 2020-08-28 北京云水浩瑞环境科技有限公司 System and method for disposal of domestic waste

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