JP3207345U - Equipment for drying hydrous biomass fuel with combustion exhaust gas - Google Patents

Equipment for drying hydrous biomass fuel with combustion exhaust gas Download PDF

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JP3207345U
JP3207345U JP2016003165U JP2016003165U JP3207345U JP 3207345 U JP3207345 U JP 3207345U JP 2016003165 U JP2016003165 U JP 2016003165U JP 2016003165 U JP2016003165 U JP 2016003165U JP 3207345 U JP3207345 U JP 3207345U
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exhaust gas
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三砂 誠一
誠一 三砂
豊博 三砂
豊博 三砂
賢志郎 古賀
賢志郎 古賀
慎哉 金子
慎哉 金子
純樹 能登
純樹 能登
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株式会社大川鉄工
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Abstract

【課題】チップ形状の高含水バイオマス燃料を乾燥して、農業施設の温風・温水の燃料に再利用するための含水バイオマス燃料の燃焼排ガスによる乾燥装置を提供する。【解決手段】30重量%以上の水分を含有しているバイオマス燃料を乾燥して燃焼する乾燥—燃焼装置において、バイオマス燃料を投入する粉砕機付原料貯蔵槽と、粉砕機付原料貯蔵槽に続く縦型羽根付き搬送コンベア部と、バイオマス燃料を混合するスパイラル状撹拌機を内装している混合乾燥容器と、乾燥バイオマス燃料のチップ状破砕物を使用した燃焼炉部と、燃焼ガスの熱交換式温風、又は温水発生部とからなり、混合乾燥容器の前に、排ガス13中の火種浮遊物の混入を防止する粉塵トラップ11と、容器内の温度を200℃以下になるように燃焼排ガス配管を容器の入口部と出口部とに分岐して、燃焼排ガスの排出—供給の流量を調節するダンパー15とを取り付ける。【選択図】図1A drying apparatus using combustion exhaust gas of hydrous biomass fuel for drying chip-like high hydrous biomass fuel and reusing it as hot air / hot water fuel in an agricultural facility is provided. In a drying-combustion apparatus that dries and burns biomass fuel containing water of 30% by weight or more, a raw material storage tank with a pulverizer and a raw material storage tank with a pulverizer into which the biomass fuel is charged. Conveyor section with vertical blades, mixing and drying container with a spiral stirrer that mixes biomass fuel, combustion furnace section using chip-shaped crushed material of dried biomass fuel, and heat exchange type of combustion gas Composed of a warm air or hot water generator, a dust trap 11 for preventing the mixture of fire-type suspended matters in the exhaust gas 13 before the mixing and drying container, and a combustion exhaust gas pipe so that the temperature in the container is 200 ° C. or lower And a damper 15 for adjusting the flow rate of discharge and supply of the combustion exhaust gas is attached. [Selection] Figure 1

Description

本考案は、特に水分などを含む含水バイオマス燃料である植物性廃材の廃棄物の、掻き出し撹拌機付きの乾燥によって、特に水分を多く含む植物性廃材の塊状物を破砕・混合・乾燥操作において低水分量にする乾燥した後に、燃焼装置によって熱風を発生して乾燥処理と、燃料として温風、温水発生装置を提供することに関する。The present invention reduces the waste of vegetable waste, which is a water-containing biomass fuel that contains water, etc., with a scraping stirrer, especially for crushing, mixing, and drying operations. The present invention relates to a drying process by generating hot air by a combustion device after drying to a moisture content, and providing hot air and a hot water generator as fuel.

貯蔵ホッパー内に回転羽根軸を設けて、水分を多量に含有する収納物の流動性を増しているが、高い粘着性を持つ物質には適性ではなく、回転軸・羽根に張り付き、ケースとの間に物質が挟まり取出しを困難にしている。回転軸が止まる場合がある。これに対して種々提案がある(特許文献1〜3参照)。今で水分の高いエノキ茸菌床体については、乾燥時に破砕、掻き出し機において十分な結果が得られていない。Although a rotating blade shaft is provided in the storage hopper to increase the fluidity of stored items containing a large amount of moisture, it is not suitable for substances with high tackiness, and sticks to the rotating shaft / blade. It is difficult to remove the material between them. The rotating shaft may stop. There are various proposals for this (see Patent Documents 1 to 3). As for the enoki mushroom bed with high water content, sufficient results have not been obtained in the crushing and scraping machine at the time of drying.

またオカラは高たんぱくの食品加工残渣であり、養魚用飼料や畜産飼料として広く採用されている。このオカラを発酵処理して使用する手段として、オカラを繊維分解酵素枯草菌で予備発酵させて脱水乾燥させ、これに他の原料を添加混合する混合飼料が開示されている(特許文献1参照)。Okara is a high-protein food processing residue and is widely used as a feed for fish farming and livestock feed. As a means for fermenting and using this okara, a mixed feed is disclosed in which the okara is pre-fermented with a fiber-degrading enzyme Bacillus subtilis, dehydrated and dried, and other raw materials are added and mixed thereto (see Patent Document 1). .

またイカ肝臓が摂餌誘引効果を有することが知られているが、生のまま乾燥配合飼料として利用されることは無く、一旦粉末状に形成した後に配合飼料の原料として使用している。また、他の配合原料との混合物を混練、加熱、加圧処理して製出する魚類飼料が開示されている(特許文献2参照)。Although squid liver is known to have a feeding-inducing effect, it is not used as a dry blended feed as it is, but once formed into a powder form, it is used as a raw material for the blended feed. In addition, a fish feed produced by kneading, heating, and pressurizing a mixture with other blended raw materials has been disclosed (see Patent Document 2).

木材は、加工する工程で多量の廃材が発生する。木材の廃材は、木材を削って発生するプレーナー屑、種々の廃材の混合物、MDFやパーティクルボード等の廃材を粉砕した水分を含む屑、木片や皮を破砕した屑等が多量に発生する。これ等の木質系バイオマスは、焼却して廃棄しているのが実状で、焼却して廃棄するときに発生する熱エネルギーは有効に利用されていない(特許文献3参照)。A large amount of waste material is generated in the process of processing wood. Waste wood is generated in large quantities, such as planar waste generated by cutting wood, a mixture of various waste materials, waste containing pulverized waste such as MDF and particle board, and scraps obtained by crushing wood pieces and skins. These woody biomass is actually incinerated and discarded, and thermal energy generated when incinerated and discarded is not effectively used (see Patent Document 3).

一方、天然の木材は、金属やプラスチックでは得られない自然木に独特の美しさと風合いはあるが、未乾燥な状態で使用すると、時間が経過するにしたがって、変形して狂いが発生し、あるいは収縮して隙間ができる等の欠点がある。この欠点は、木材を充分に乾燥して隙間を少なくできる。しかしながら、木材を充分に乾燥するには、長期間にわたって放置するか、あるいは加熱して水分を強制的に除去する必要がある。強制的に水分を除去する方法は、短時間で乾燥できるが、多量の熱エネルギーを消費するので、ランニングコストが高くなる欠点がある。On the other hand, natural wood has a unique beauty and texture of natural wood that cannot be obtained with metal or plastic, but if it is used in an undried state, it will deform and become distorted over time, Or there is a defect such as shrinkage to form a gap. This drawback allows the wood to be sufficiently dried to reduce gaps. However, in order to sufficiently dry the wood, it is necessary to leave it for a long period of time or to remove moisture by heating. Although the method of forcibly removing moisture can be dried in a short time, it consumes a large amount of heat energy, and thus has a drawback of increasing running costs.

木材乾燥のランニングコストを低減することを目的として、水分を含有する木質系バイオマスを燃焼させるときに発生する熱エネルギーを有効利用する乾燥方法が開発されている(特許文献4参照)。For the purpose of reducing the running cost of drying wood, a drying method has been developed that effectively uses thermal energy generated when woody biomass containing moisture is burned (see Patent Document 4).

この文献では、耐火室の床部に炉、室内中央部に生木の桟積部、室内の適宜箇所に設置した対流送風装置、および室内と木材中心部に配置した温度センサーを有し、炉内に、木屑、解体材あるいは木片等の廃材を燃焼材として入れ、その表面を、プレーナー屑、カンナ屑、樹皮あるいは古紙等の廃材で着火材としてカバーし、そして炉のフタをし、着火後は、排気ダクト等の空気調整により、炉内を不完全燃焼させ、また室温を75〜80℃の範囲に調整し、煙および熱風を対流送風装置にて循環させて乾燥対象木材および外気温度に応じ約3〜5日間低温燻煙乾燥し、室内温度と外気温度および木材の中心部温度差が8℃以内になるまで放置する工程からなる木材の燻煙乾燥方法が記載される。In this document, there is a furnace in the floor of the fireproof room, a pedestrian part of raw wood in the center of the room, a convection blower installed in an appropriate place in the room, and a temperature sensor arranged in the center of the room and wood, Inside, waste materials such as wood scraps, demolition materials or wood fragments are put as combustion materials, and the surface is covered as waste materials such as planar waste, canna waste, bark or waste paper, etc., and the lid of the furnace is covered and after ignition Adjusts the air inside the furnace by adjusting the air in the exhaust duct, etc., adjusts the room temperature to a range of 75 to 80 ° C., and circulates smoke and hot air in the convection blower to reach the drying target wood and the outside air temperature. Accordingly, there is described a method for drying smoke from wood comprising a step of drying at low temperature smoke for about 3 to 5 days and leaving it until the difference between the room temperature and the outside temperature and the temperature at the center of the wood is within 8 ° C.

従来より、鶏糞、家畜糞、家庭ゴミなどその他の含水有機廃棄処理物を乾燥処理する外熱式の乾燥炉や焼却炉が知られている。また、乾燥炉と焼却炉を組み合わせて、焼却炉の燃焼排ガスを乾燥炭化炉の熱源として利用する提案もあった。(特許文献5,6参照。)2. Description of the Related Art Conventionally, an externally heated drying furnace or incinerator for drying other water-containing organic waste such as chicken manure, livestock manure, and household waste is known. There has also been a proposal to use a combustion gas from an incinerator as a heat source for a dry carbonization furnace by combining a drying furnace and an incinerator. (See Patent Documents 5 and 6.)

含水バイオマス燃料である植物性廃材に関する乾燥装置については、堆肥への利用がほとんどであって、菌床、燃料での再利用としての情報は存在していない。とくに植物性廃材の高度の再利用については菌床としての活用はほとんど知られていない。About the drying apparatus regarding the vegetable waste material which is a water-containing biomass fuel, the utilization to compost is most, and the information as reuse with a fungus bed and fuel does not exist. In particular, little is known about the utilization of plant waste as a fungus bed.

特開平11−289994号公報。JP-A-11-289994. 特許3023534号公報。Japanese Patent No. 3023534. 特許3314302号公報。Japanese Patent No. 3314302. 特開平5−164314号公報JP-A-5-164314 特開2002−356319号公報JP 2002-356319 A

高含水の含水バイオマス燃料である植物性廃材の粘性の高い塊状廃棄物を処理する場合において、貯蔵ホッパの下部に排出スクリューコンベヤ、押出し用の縦板付コンベヤ、パンコンベヤ、スクレーパコンベヤ等の搬送機での切り出し装置が提案されているが、廃棄物を貯蔵する貯蔵ホッパでは、ホッパ内に多量の塊状物質を堆積させると、熱処理を施す場合に破砕、撹拌・切り出し、掻き出し装置に、物質を排出するための負荷だけでなく、堆積した物質の重量が余分な負荷として加えて、十分な撹拌・排出処理ができないのが現状である。また乾燥時の操作状態によってムラガあって十分な乾燥物を得ることが難しい。When processing highly viscous bulk waste of vegetable waste, which is a hydrous biomass fuel with a high water content, a conveyor such as a discharge screw conveyor, a conveyor with vertical plates for extrusion, a bread conveyor, a scraper conveyor, etc. is provided below the storage hopper. In a storage hopper that stores waste, if a large amount of bulk material is deposited in the hopper, it is crushed, stirred, cut out, and discharged to the scraping device when heat treatment is performed. In addition to the load for this, the weight of the deposited material is added as an extra load, and it is not possible to perform sufficient agitation / discharge treatment. Further, it is difficult to obtain a sufficiently dry product due to unevenness depending on the operation state at the time of drying.

本考案はこのような水分の多い塊状物で粘性を持つ含水バイオマス燃料である植物性廃材を乾燥装置に適用される乾燥撹拌容器と熱処理装置を持つことが重要である。前記問題点を解決した装置を提供することを課題として、特に50%以上多量の水分を含有し、粘性のあるバイオマスの塊状物を再利用する場合に、粉砕した後十分に均一に乾燥できる熱風で処理して、処理物が水分を均一に20%以下にすることなどの熱処理方法によって有効な燃料に仕上げることが可能な排ガスによる乾燥方法を確立することに目的を持っている。In the present invention, it is important to have a dry stirring vessel and a heat treatment apparatus for applying a vegetable waste material, which is a water-containing biomass fuel having viscosity with a lot of moisture, to the drying apparatus. With the object of providing an apparatus that solves the above-mentioned problems, hot air that can be dried sufficiently uniformly after being pulverized, especially when reusing a massive biomass mass containing more than 50% water The purpose is to establish a drying method using exhaust gas that can be processed into an effective fuel by a heat treatment method such that the water content of the processed product is uniformly 20% or less.

さらに、以上の文献に記載される方法は、高含水の含水バイオマス燃料である植物性廃材を燃焼するときに発生する燃焼排ガスの熱エネルギーを乾燥に使用するので、その他の燃焼燃料などの用途に有効利用はできない。水分を多量に含有する高含水のバイオマス燃料をした燃焼器の提案はほとんどない。高含水の含水バイオマス燃料を極めて経済的に乾燥して燃料として利用できることに加えて、含水高含水の植物性廃材であるバイオマスを安全な温度に制御しながら乾燥して、燃料用チップからできる高含水のバイオマス燃料による発生熱利用方法を提供することにある。Furthermore, the method described in the above literature uses the thermal energy of the combustion exhaust gas generated when burning plant waste material, which is a high water content hydrous biomass fuel, for drying. It cannot be used effectively. There are few proposals of a combustor using a high water content biomass fuel containing a large amount of water. In addition to being able to dry and use highly hydrous biomass fuel as a fuel very economically, it is possible to dry biomass while controlling it to a safe temperature and to make it from fuel chips. The object is to provide a method of using heat generated by hydrous biomass fuel.

含水バイオマス燃料より一層の省資源化と無公害化(環境保全)に寄与するために、チップの形状の高含水のバイオマス燃料を系内の排ガスで乾燥して、有効な高含水のバイオマス燃料の熱源を循環させながら農業施設の温風・温水の燃料にするためのシステム開発をおこなうことを目的にしている。In order to contribute to further resource saving and pollution-free (environmental conservation) than hydrous biomass fuel, the high hydrous biomass fuel in the shape of chips is dried with the exhaust gas in the system, and the effective hydrous biomass fuel The purpose is to develop a system to use hot air and hot water fuel in agricultural facilities while circulating heat sources.

30重量%以上の水分を含有している含水バイオマス燃料を乾燥処理して燃焼できる乾燥―燃焼装置において、バイオマス燃料を投入する粉砕機付原料貯蔵槽と、前記粉砕機付原料貯蔵槽から縦型羽根付き搬送コンベア部と、当該バイオマス燃料を混合させる機能を持つ、スパイラル状撹拌機を内装している混合乾燥容器と、その乾燥バイオマス燃料のチップ状破砕物を使用した燃焼炉部と、燃焼ガスの熱交換式温風、又は温水発生部とからなり、前記燃焼炉部を通過した燃焼排ガスを使用して、前記含水バイオマスチップを乾燥して燃焼装置に供給するために、前記の混合乾燥容器の前に、燃焼排ガス中の火種浮遊物の混入を防止できる粉塵トラップと、容器内の温度を200℃以下になるように燃焼排ガス配管を前記容器の入口部と出口部とに分岐して、燃焼排ガスの容器内の排出―供給の流量を調節できるように、それぞれの両口部に流量調節可能なダンパーとを取り付けている含水バイオマス燃料を燃焼排ガスによる乾燥装置である。In a drying-combustion device capable of drying and burning a hydrous biomass fuel containing 30% by weight or more of water, a raw material storage tank with a pulverizer into which biomass fuel is charged, and a vertical type from the raw material storage tank with a pulverizer A conveyor conveyer with blades, a mixing and drying container having a spiral stirrer having a function of mixing the biomass fuel, a combustion furnace using chips of the dried biomass fuel, and a combustion gas In order to dry the hydrated biomass chip and supply it to the combustion apparatus using the combustion exhaust gas that has passed through the combustion furnace section and is supplied to the combustion apparatus, Prior to the operation, a dust trap capable of preventing the inclusion of a fire-floating suspended matter in the combustion exhaust gas, and the combustion exhaust gas piping so that the temperature in the container is 200 ° C. or lower, the inlet and outlet of the container It is a drying device using combustion exhaust gas for hydrous biomass fuel that is equipped with dampers that can adjust the flow rate at both ends so that the flow rate of exhaust gas supply and supply in the container can be adjusted. .

前記粉砕機付原料貯蔵槽から縦型羽根付き搬送コンベア部は、スパイラル形状の撹拌アーム羽根を取り付け、前記羽根における混合乾燥容器の壁面との隙間を10〜50mmにして、前記撹拌アーム羽根に100〜400mmの間隔で掻きだし可能なアングル型の掻き混ぜ具を設けている混合乾燥容器内では、200℃以下の温度でコントロールできるようにして、燃焼排ガスで火種の浮遊物の導入を防止するために、燃焼炉で出口付近に浮遊物回収の粉塵トラップとして、燃焼炉―熱交換部の出口付近の出口配管断面に対して3〜10倍の断面を持って給水可能なトラップ容器を設けるとともに、さらにガス中の微小浮遊物を除去・消滅させるために、排ガス送風の配管を径300mmφ以下で、3m以上の長さにして、前記容器の入口部と出口部で流量を両口部で調節的に供給並びに流通させながら、含水バイオマス燃料の破砕状体を流動的に掻き混ぜながら乾燥できるようにして、乾燥バイオマス燃料を粉体状態で燃焼装置にスクリューコンベアにて供給できるようにしている。The conveyor conveyor with vertical blades from the raw material storage tank with pulverizer is equipped with a spiral stirring arm blade, and the space between the blade and the wall of the mixing and drying vessel is 10 to 50 mm, and the stirring arm blade is 100 In a mixing and drying vessel provided with an angle-type stirrer that can be scraped at intervals of ˜400 mm, in order to prevent the introduction of fire-floating suspended matter in the combustion exhaust gas by enabling control at a temperature of 200 ° C. or lower. In addition, as a dust trap for the recovery of suspended matter in the vicinity of the outlet in the combustion furnace, a trap container capable of supplying water with a cross section of 3 to 10 times the cross section of the outlet pipe near the outlet of the combustion furnace-heat exchange section is provided. Further, in order to remove and eliminate the fine suspended matters in the gas, the exhaust gas blowing pipe has a diameter of 300 mmφ or less and a length of 3 m or more. While supplying and distributing the flow rate at both outlets in a controlled manner at the outlet, the crushed body of hydrous biomass fuel can be dried while being fluidly stirred, and the dried biomass fuel is screwed into the combustion device in a powder state. It can be supplied on a conveyor.

排出、並びに供給の流量を調節できる二重ダンパー付配管は、燃焼炉―熱交換部で排出される燃焼排ガスを、前記粉塵トラップを経由して前記混合乾燥容器の原料入口部で、分岐配管にして、一方は直接に入口部に導入し、もう一方を出口部に導入して、分岐部では両配管に流量を調整できる二重ダンパーを設けて、前記容器内の入口部温度を200℃以下なるようにするために、両ダンパーの開閉度合によって両者の流量を調整的に流通させ、前記混合乾燥容器を通過した燃焼排ガスをサイクロンから煙道より排出する。A pipe with a double damper that can adjust the discharge and supply flow rate is a branch pipe that connects the combustion exhaust gas discharged from the combustion furnace-heat exchange section to the raw material inlet of the mixing and drying vessel via the dust trap. One is directly introduced into the inlet portion, the other is introduced into the outlet portion, and a double damper is provided in the branching section to adjust the flow rate in both pipes, and the inlet portion temperature in the container is 200 ° C. or less. In order to achieve this, the flow rates of both dampers are circulated in an adjusted manner according to the degree of opening and closing of both dampers, and the combustion exhaust gas that has passed through the mixing and drying vessel is discharged from the cyclone from the flue.

燃焼排ガス中に火種浮遊物の混入を防止できる粉塵トラップは、配管内の排出燃焼ガスの流速において、燃焼炉―熱交換部の出口付近に出口配管断面に対して3〜10倍の断面で、しかも底部に常時少量の水を補給できる円筒状粉塵トラップ容器にして、トラップ内の流速を配管内の通過流速の1/5〜1/10になるような容積になっている。The dust trap that can prevent the mixture of suspended solids in the flue gas is 3-10 times the cross section of the outlet pipe near the outlet of the combustion furnace-heat exchange section at the flow rate of the exhaust combustion gas in the pipe. Moreover, it is a cylindrical dust trap container that can always supply a small amount of water to the bottom, and has a volume that makes the flow rate in the trap 1/5 to 1/10 of the passage flow rate in the pipe.

植物性廃材としての含水バイオマス燃料は、間伐材、街路樹の枝打ち材、住宅廃材、伐採竹材を、きのこの廃菌床などで、5〜100mmに破砕したものであって、水分を30%以上含有しているものである。Water-containing biomass fuel as plant waste is thinned wood, roadside tree pruning material, house waste, harvested bamboo, etc., crushed to 5-100 mm with waste mushroom beds, etc., and has a moisture content of 30% or more It is contained.

含水バイオマスを燃料等の原料は、含水植物性廃材を乾燥処理によってバイオマス燃料として有効利用されて、乾燥処理が困難であった原料の粉砕・破砕処理によって、前記の廃棄物を有効に利用できた。含水バイオマスを燃焼排ガスによって、安全に乾燥処理を行い、有効な燃料として活用でき、温水、温風、などの熱源になり、含水木質系バイオマス燃料を燃焼して発生する熱エネルギーを有効に利用して、燃焼前に木材を極めて経済的に乾燥できる特長がある。とくに、本考案の温水発生熱利用方法は、バイオマスを燃焼に適した理想的な温度と水分に制御しながら乾燥できる燃料にしている経済的方法に特長がある。The raw material such as fuel containing hydrous biomass was effectively used as biomass fuel by drying treatment of hydrated plant waste material, and the above-mentioned waste could be effectively used by crushing and crushing raw materials that were difficult to dry. . Water-containing biomass can be safely dried using combustion exhaust gas, can be used as an effective fuel, becomes a heat source for hot water, hot air, etc., and effectively uses the heat energy generated by burning water-containing woody biomass fuel This makes it possible to dry wood very economically before combustion. In particular, the method for using heat generated by hot water according to the present invention is characterized by an economical method in which biomass can be dried while being controlled to an ideal temperature and moisture suitable for combustion.

含水バイオマス燃料を燃焼する熱エネルギーを有効利用して、乾燥して燃焼して得られた温風、温水をビニールハウスに供給することができることである。このように、含水バイオマス燃料を燃焼して得られた排ガスによって、乾燥温度を調整しながら、極めて理想的に燃料として含水バイオマス燃料を乾燥でき、従来の廃材の乾燥に対して1/2〜1/6と超低コストで熱源をえることが可能である。The hot energy and the hot water obtained by drying and burning can be supplied to the greenhouse by effectively using the thermal energy for burning the hydrous biomass fuel. In this way, with the exhaust gas obtained by burning the hydrated biomass fuel, the hydrated biomass fuel can be extremely ideally dried as the fuel while adjusting the drying temperature. A heat source can be obtained at an extremely low cost of / 6.

以上の構成よりなるものであり、含水バイオマス燃料を乾燥・粉砕化した燃料として、これによれば温風・温水発生をもたらし、熱源循環機構と排熱回収機構とを有しているので、より一層の省資源化と無公害化の推進が図れる。燃料として資源回収できるので産業上の利用価値が大きい。温風・温水を利用して発生する熱源は、農業用ビニールハウスなどの温室暖房の熱源として使用できるものである。Consisting of the above configuration, the dry biomass fuel containing hydrous biomass fuel brings about the generation of hot air and hot water, and has a heat source circulation mechanism and exhaust heat recovery mechanism. Further resource conservation and pollution-free promotion can be promoted. Since the resources can be recovered as fuel, the industrial utility value is great. The heat source generated using hot air and hot water can be used as a heat source for greenhouse heating in an agricultural greenhouse.

含水バイオマス燃料を燃焼排ガスによる乾燥装置からの燃料を使用した燃焼装置を含む乾燥器―燃焼装置の全体図。1 is an overall view of a dryer-combustion device including a combustion device that uses fuel from a drying device that uses hydrous biomass fuel as a combustion exhaust gas. 含水バイオマス燃料を燃焼排ガスの使用による乾燥装置(混合乾燥容器)の図。The figure of the drying apparatus (mixed drying container) by use of combustion biomass exhaust gas with hydrous biomass fuel. 燃焼排ガスの排出―供給の調整により流量調節可能なダンパー付分岐配管の正面図。FIG. 3 is a front view of a branch pipe with a damper whose flow rate can be adjusted by adjusting exhaust gas discharge and supply. 燃焼排ガスの排出―供給の調整により流量調節可能なダンパー付分岐配管の平面図。FIG. 3 is a plan view of a branch piping with a damper whose flow rate can be adjusted by adjusting exhaust gas discharge and supply. 燃焼排ガス中の火種浮遊物の混入を防止できる粉塵トラップの図Illustration of a dust trap that can prevent the inclusion of fire-floating suspended matter in combustion exhaust gas

次に本発明の実施の形態について説明する。30重量%以上の水分を含有している含水バイオマスを燃料とした乾燥処理による乾燥―燃焼装置において、バイオマス燃料を投入する粉砕機付原料貯蔵槽と、前記粉砕機付原料貯蔵槽から縦型羽根付き搬送コンベア部と、当該バイオマス燃料を混合させる機能を持つ、スパイラル状撹拌機を内装している混合乾燥容器と、その乾燥バイオマス燃料のチップ状破砕物を使用した燃焼炉部と、燃焼ガスの熱交換式温風、又は温水発生部とを通過した装置である。Next, an embodiment of the present invention will be described. In a drying-combustion apparatus using a hydrous biomass containing water of 30% by weight or more as fuel, a raw material storage tank with a pulverizer for charging biomass fuel, and a vertical blade from the raw material storage tank with a pulverizer A conveyor conveyor unit, a mixing and drying vessel having a spiral mixer equipped with a function of mixing the biomass fuel, a combustion furnace unit using chip-shaped crushed material of the dried biomass fuel, and a combustion gas It is an apparatus that has passed through a heat exchange type hot air or a hot water generator.

上記装置において、燃焼排ガスを使用して、55%の含水バイオマスチップを、乾燥して燃焼装置に供給するために、前記の混合乾燥容器の前に、燃焼排ガス中の火種浮遊物の混入を防止できるトラップと、容器内の温度を200℃以下になるように燃焼排ガス配管を前記容器の入口部と出口部とに分岐して、燃焼排ガスの容器内の排出―供給の流量を調節できるように、それぞれの両口に流量調節可能なダンパーとを取り付けた。In the above device, 55% hydrous biomass chips are dried and supplied to the combustion device using the combustion exhaust gas. A flue gas trap and a combustion exhaust gas pipe branched into the inlet and outlet of the container so that the temperature in the container is 200 ° C. or lower so that the flow rate of exhaust gas in the container can be adjusted. A damper with adjustable flow rate was attached to each of the two ports.

図1に示すようにスパイラル形状の撹拌アーム羽根を取り付け、前記羽根における混合乾燥容器の壁面との隙間を30mmにして、前記撹拌アーム羽根に60mmの間隔で掻きだし可能なアングル型の掻き混ぜ具を設けている混合乾燥容器内には、200℃以下の温度で維持でき、火種の浮遊物の搬出を防止するために、燃焼炉で出口付近に浮遊物回収の粉塵トラップとして、燃焼炉―熱交換部の出口付近の出口配管断面に対して10倍の断面を持つ水供給可能なトラップ容器を設けるとともに、さらにガス中の微小浮遊物を除去・消滅させるために、配管を径250mmφ以下で、15mの長さにして、前記容器の入口部と出口部で流量を両口で調節的に供給・流通させながら、図2に示すような流動的に含水バイオマス燃料の破砕状体を均一に掻き混ぜながら乾燥できるようにして、乾燥バイオマス燃料を粉体状態で燃焼装置にスクリューコンベアにて供給できるようにした。As shown in FIG. 1, a spiral stirring arm blade is attached, the clearance between the blade and the wall of the mixing and drying container is 30 mm, and an angle-type stirring device that can be scraped to the stirring arm blade at an interval of 60 mm In the mixing and drying vessel, the temperature can be maintained at 200 ° C or lower, and in order to prevent the discharge of suspended solids of the fire type, the combustion furnace-heat In addition to providing a trap container capable of supplying water with a cross section of 10 times the outlet pipe cross section near the outlet of the exchange section, in order to further remove and extinguish micro suspended matters in the gas, the pipe has a diameter of 250 mmφ or less, The crushed material of hydrous biomass fuel as shown in FIG. 2 is flown in a length of 15 m while the flow rate is regulated and supplied through both the inlet and outlet of the container. It allowed to be dried while stirring to one, and can be supplied by a screw conveyor to a combustion device of dry biomass fuel in a powder state.

排出―供給の流量調節可能な二重ダンパー付配管は、燃焼炉―熱交換部で排出される燃焼排ガスを、図3に示すように粉塵トラップを経由して前記混合乾燥容器の原料入口部で、分岐配管にして、一方は直接に入口部に導入し、もう一方を出口部に導入して、分岐部では両配管に流量調整可能なダンパーを設けて、前記容器内の入口部温度を200℃以下なるように両ダンパーの開閉度合によって両者の流量を調整して流通させ、前記混合乾燥容器を通過した排ガス全体を容器の入口部に取り付けたサイクロンから煙道より排出させた。A pipe with a double damper, which can adjust the flow rate of the discharge and supply, allows the flue gas discharged from the combustion furnace and heat exchange section to pass through a dust trap as shown in FIG. In the branch pipe, one is directly introduced into the inlet section, the other is introduced into the outlet section, and the branch section is provided with a damper capable of adjusting the flow rate in both pipes, so that the inlet temperature in the container is 200. The flow rates of both dampers were adjusted so as to be less than or equal to 0 ° C. and flowed, and the entire exhaust gas that passed through the mixing and drying vessel was discharged from a flue from a cyclone attached to the inlet of the vessel.

図4に示すように火種浮遊物の混入を防止できる粉塵トラップは、配管内の排出燃焼ガスの流速において、燃焼炉―熱交換部の出口付近に出口配管断面に対して7倍の断面で、しかも底部に常時少量の水を補給できる円筒状トラップ容器にして、トラップ内の流速を配管内の通過流速の1/10になるような容積にした。これによる燃焼はスムーズになり、高い熱量を得ることができた。As shown in FIG. 4, the dust trap that can prevent the entry of suspended solids has a cross section that is seven times the cross section of the outlet pipe near the outlet of the combustion furnace-heat exchange section at the flow rate of the exhaust combustion gas in the pipe. In addition, a cylindrical trap container capable of constantly replenishing a small amount of water to the bottom was made, and the volume of the flow rate in the trap was set to 1/10 of the passage flow rate in the pipe. The combustion by this became smooth and high calorific value was able to be obtained.

上記装置において、燃焼排ガスを使用して、30%以上の含水植物性廃材(バイオマス燃料)含水バイオマスチップを、乾燥して燃焼装置に供給するために、前記の混合乾燥容器の前に、燃焼排ガス中の火種浮遊物の混入を防止できるトラップと、容器内の温度を200℃以下になるように燃焼排ガス配管を前記容器の入口部と出口部とに分岐して、燃焼排ガスの容器内の排出―供給の流量を調節できるように、それぞれの両口に流量調節可能なダンパーとを取り付けた。In the above apparatus, the combustion exhaust gas is used to dry 30% or more of the hydrated plant waste material (biomass fuel) hydrated biomass chip before supplying it to the combustion apparatus. A trap that can prevent the entry of suspended solids in the fire, and a combustion exhaust gas pipe branched into an inlet and an outlet of the container so that the temperature in the container is 200 ° C. or lower, and exhaust of combustion exhaust gas in the container -A damper with adjustable flow rate was attached to each port so that the supply flow rate could be adjusted.

図1に示すようにスパイラル形状の撹拌アーム羽根を取り付け、前記羽根における混合乾燥容器の壁面との隙間を20〜70mmにして、前記撹拌アーム羽根に50〜100mmの間隔で掻きだし可能なアングル型の掻き混ぜ具を設けている、混合乾燥容器内に、200℃以下の温度で維持でき、火種の浮遊物の導入を防止するために、燃焼炉で出口付近に浮遊物回収の粉塵トラップとして、燃焼炉―熱交換部の出口付近の出口配管断面に対して3〜10倍の断面を持つ水供給可能なトラップ容器を設けるとともに、さらにガス中の微小浮遊物を除去・消滅させるために、配管を径300mmφ以下で、5m以上の長さにして、前記容器の入口部と出口部で流量を両口で調節的に供給・流通させながら、流動的に含水バイオマス燃料の破砕状体を均一に掻き混ぜながら乾燥できるようにして、乾燥バイオマス燃料を粉体状態で燃焼装置にスクリューコンベアにて供給できるようにした。As shown in FIG. 1, a spiral stirring arm blade is attached, the gap between the blade and the wall of the mixing and drying vessel is 20 to 70 mm, and the stirring arm blade can be scraped at an interval of 50 to 100 mm. As a dust trap for collecting suspended matter in the vicinity of the outlet in the combustion furnace, it can be maintained at a temperature of 200 ° C. or less in a mixing and drying container provided with a stirring tool. In addition to providing a trap vessel capable of supplying water with a cross section of 3 to 10 times the cross section of the exit pipe near the exit of the combustion furnace-heat exchange section, in addition, a pipe is provided to remove and extinguish micro suspended matters in the gas. With a diameter of 300 mmφ or less and a length of 5 m or more, and fluidly crushed hydrous biomass fuel while supplying and circulating the flow rate at both inlets and outlets in a controlled manner at both ports. It allowed to be dried while uniformly stirring and the dry biomass fuel to be supplied by the screw conveyor to the combustion device in a powder state.

排出―供給の流量調節可能な二重ダンパー付配管は、燃焼炉―熱交換部で排出される燃焼排ガスを、粉塵トラップを経由して前記混合乾燥容器の原料入口部で、分岐配管にして、一方は直接に入口部に導入し、もう一方を出口部に導入して、分岐部では両配管に流量調整可能なダンパーを設けて、前記容器内の入口部温度を200℃以下なるように両ダンパーの開閉度合によって両者の流量を調整して流通させ、前記混合乾燥容器を通過した排ガス全体を容器の入口部に取り付けたサイクロンから煙道より排出させた。The pipe with the double damper that can adjust the flow rate of the discharge-supply is a branch pipe that connects the combustion exhaust gas discharged from the combustion furnace-heat exchange section to the raw material inlet of the mixing and drying vessel via a dust trap. One is directly introduced into the inlet, the other is introduced into the outlet, and both pipes are provided with dampers capable of adjusting the flow rate at the branch, so that the inlet temperature in the container is 200 ° C. or lower. The flow rate of both was adjusted and circulated according to the degree of opening and closing of the damper, and the entire exhaust gas that passed through the mixing and drying vessel was discharged from a flue from a cyclone attached to the inlet of the vessel.

火種浮遊物の混入を防止できる粉塵トラップは、配管内の排出燃焼ガスの流速において、燃焼炉―熱交換部の出口付近に出口配管断面に対して3〜10倍の断面で、しかも底部に常時少量の水を補給できる円筒状粉塵トラップ容器にして、トラップ内の流速を配管内の通過流速の1/5〜1/10になるような容積にした。
非常に効果的な燃焼が得られた。特に乾燥は90%以上の結果が得られた。
Dust traps that can prevent the entry of suspended solids are 3 to 10 times the cross section of the outlet pipe near the outlet of the combustion furnace-heat exchanger at the flow rate of the exhaust combustion gas in the pipe, and always at the bottom. A cylindrical dust trap container capable of replenishing a small amount of water was used, and the volume of the flow rate in the trap was set to 1/5 to 1/10 of the passage flow rate in the pipe.
A very effective combustion was obtained. In particular, the drying resulted in 90% or more.

1 植物性廃材(バイオマス燃料)
2 混合乾燥容器
3 送風管
4 送風機(ファン)
5 サイクロン
6 バイオマス炊き燃焼室
7 スクリューコンベア
8 リングブロア式空気送風機
9 ノズル
10 スパイラル状撹拌アーム羽根
11 粉塵トラップ
12 覗き窓
13 燃焼排出ガス
14 投入口
15 ダンパー
16 煙道
17 給水
18 粉塵
19 ネット
20 水
21 燃焼灰
22 オーバーフロー
23 灰取り出し口
1 Plant waste (biomass fuel)
2 Mixing and drying container 3 Blower pipe 4 Blower (fan)
5 Cyclone 6 Biomass cooking combustion chamber 7 Screw conveyor 8 Ring blower type air blower 9 Nozzle 10 Spiral stirring arm blade 11 Dust trap 12 Viewing window 13 Combustion exhaust gas 14 Input port 15 Damper 16 Flue 17 Water supply 18 Dust 19 Net 20 Water 21 Combustion ash 22 Overflow 23 Ash outlet

30重量%以上の水分を含有している含水バイオマス燃料を乾燥処理して燃焼できる乾燥―燃焼装置において、バイオマス燃料を投入する粉砕機付原料貯蔵槽と、前記粉砕機付原料貯蔵槽に続く縦型羽根付き搬送コンベア部と、当該バイオマス燃料を混合させる機能を持つ、スパイラル状撹拌機を内装している混合乾燥容器と、その乾燥バイオマス燃料のチップ状破砕物を使用した燃焼炉部と、燃焼ガスの熱交換式温風、又は温水発生部とからなり、前記燃焼炉部を通過した燃焼排ガスを使用して、前記含水バイオマスチップを乾燥して燃焼装置に供給するために、前記の混合乾燥容器の前に、燃焼排ガス中の火種浮遊物の混入を防止できる粉塵トラップと、容器内の温度を200℃以下になるように燃焼排ガス配管を前記容器の入口部と出口部とに分岐して、燃焼排ガスの容器内の排出―供給の流量を調節できるように、それぞれの両口部に流量調節可能なダンパーとを取り付けている含水バイオマス燃料の燃焼排ガスによる乾燥装置である。In a drying-combustion apparatus capable of drying and burning a hydrous biomass fuel containing 30% by weight or more of water, a raw material storage tank with a pulverizer into which biomass fuel is charged, and a vertical line following the raw material storage tank with a pulverizer Conveyor section with mold blades, mixing and drying container with spiral stirrer that has the function of mixing the biomass fuel, combustion furnace section using chip-shaped crushed material of the dried biomass fuel, and combustion In order to dry the hydrated biomass chip and supply it to the combustion apparatus using the combustion exhaust gas that has been composed of a gas heat exchange type hot air or a hot water generation unit and has passed through the combustion furnace unit, the mixed drying In front of the container, a dust trap that can prevent the inclusion of fire-floating suspended matters in the combustion exhaust gas, and the combustion exhaust gas piping from the inlet of the container so that the temperature inside the container is 200 ° C. or lower. This is a device for drying hydrous biomass fuel with flue gas, which is equipped with dampers that can adjust the flow rate at both ports so that the flow rate of the exhaust gas in the container can be adjusted. is there.

前記粉砕機付原料貯蔵槽に続く縦型羽根付き搬送コンベア部は、スパイラル形状の撹拌アーム羽根を取り付け、前記羽根における混合乾燥容器の壁面との隙間を10〜50mmにして、前記撹拌アーム羽根に100〜400mmの間隔で掻きだし可能なアングル型の掻き混ぜ具を設けている混合乾燥容器内では、200℃以下の温度でコントロールできるようにして、燃焼排ガスで火種の浮遊物の導入を防止するために、燃焼炉で出口付近に浮遊物回収の粉塵トラップとして、燃焼炉―熱交換部の出口付近の出口配管断面に対して3〜10倍の断面を持って給水可能なトラップ容器を設けるとともに、さらにガス中の微小浮遊物を除去・消滅させるために、排ガス送風の配管を径300mmφ以下で、3m以上の長さにして、前記容器の入口部と出口部で流量を両口部で調節的に供給並びに流通させながら、含水バイオマス燃料の破砕状体を流動的に掻き混ぜながら乾燥できるようにして、乾燥バイオマス燃料を粉体状態で燃焼装置にスクリューコンベアにて供給できるようにしている。The conveyor conveyor with vertical blades following the raw material storage tank with pulverizer is equipped with a spiral stirring arm blade, the gap between the blade and the wall of the mixing and drying vessel is 10 to 50 mm, In a mixing and drying container provided with an angle-type agitator that can be scraped at intervals of 100 to 400 mm, it can be controlled at a temperature of 200 ° C. or lower to prevent the introduction of fire-floating suspended matter with combustion exhaust gas. Therefore, in the combustion furnace, a trap container capable of supplying water with a cross section of 3 to 10 times the cross section of the outlet pipe near the outlet of the combustion furnace and heat exchange section is provided as a dust trap for collecting suspended matter near the outlet. Furthermore, in order to remove and extinguish microscopic suspended matters in the gas, the exhaust gas blowing pipe has a diameter of 300 mmφ or less and a length of 3 m or more. In addition, the dried biomass fuel is supplied to the combustion device in a powder state so that the crushed body of the hydrous biomass fuel can be dried while being fluidly stirred while supplying and circulating the flow rate at both outlets in a controlled manner. It can be supplied on a screw conveyor.

含水バイオマス燃料の燃焼排ガスによる乾燥装置からの燃料を使用した燃焼装置を含む乾燥器―燃焼装置の全体図。1 is a general view of a dryer-combustion device including a combustion device that uses fuel from a drying device that uses a combustion exhaust gas of hydrous biomass fuel. 含水バイオマス燃料の燃焼排ガスの使用による乾燥装置(混合乾燥容器)の図。The figure of the drying apparatus (mixing drying container) by use of the combustion exhaust gas of a hydrous biomass fuel. 燃焼排ガスの排出―供給の調整により流量調節可能なダンパー付分岐配管の正面図。FIG. 3 is a front view of a branch pipe with a damper whose flow rate can be adjusted by adjusting exhaust gas discharge and supply. 燃焼排ガスの排出―供給の調整により流量調節可能なダンパー付分岐配管の平面図。FIG. 3 is a plan view of a branch piping with a damper whose flow rate can be adjusted by adjusting exhaust gas discharge and supply. 燃焼排ガス中の火種浮遊物の混入を防止できる粉塵トラップの図Illustration of a dust trap that can prevent the inclusion of fire-floating suspended matter in combustion exhaust gas

Claims (4)

30重量%以上の水分を含有している含水バイオマス燃料を乾燥処理して燃焼できる乾燥―燃焼装置において、バイオマス燃料を投入する粉砕機付原料貯蔵槽と、前記粉砕機付原料貯蔵槽から縦型羽根付き搬送コンベア部と、当該バイオマス燃料を混合させる機能を持つ、スパイラル状撹拌機を内装している混合乾燥容器と、その乾燥バイオマス燃料のチップ状破砕物を使用した燃焼炉部と、燃焼ガスの熱交換式温風、又は温水発生部とからなり、前記燃焼炉部を通過した燃焼排ガスを使用して、前記含水バイオマスチップを乾燥して燃焼装置に供給するために、前記の混合乾燥容器の前に、燃焼排ガス中の火種浮遊物の混入を防止できる粉塵トラップと、容器内の温度を200℃以下になるように燃焼排ガス配管を前記容器の入口部と出口部とに分岐して、燃焼排ガスの容器内の排出―供給の流量を調節できるように、それぞれの両口部に流量調節可能なダンパーとを取り付けていることを特徴とする含水バイオマス燃料を燃焼排ガスによる乾燥装置。In a drying-combustion device capable of drying and burning a hydrous biomass fuel containing 30% by weight or more of water, a raw material storage tank with a pulverizer into which biomass fuel is charged, and a vertical type from the raw material storage tank with a pulverizer A conveyor conveyer with blades, a mixing and drying container having a spiral stirrer having a function of mixing the biomass fuel, a combustion furnace using chips of the dried biomass fuel, and a combustion gas In order to dry the hydrated biomass chip and supply it to the combustion apparatus using the combustion exhaust gas that has passed through the combustion furnace section and is supplied to the combustion apparatus, Prior to the operation, a dust trap capable of preventing the inclusion of a fire-floating suspended matter in the combustion exhaust gas, and the combustion exhaust gas piping so that the temperature in the container is 200 ° C. or lower, the inlet and outlet of the container The water-containing biomass fuel is characterized by having dampers that can adjust the flow rate at each port so that the flow rate of the exhaust gas in the container can be adjusted. By drying equipment. 前記粉砕機付原料貯蔵槽から縦型羽根付き搬送コンベア部は、スパイラル形状の撹拌アーム羽根を取り付け、前記羽根における混合乾燥容器の壁面との隙間を10〜50mmにして、前記撹拌アーム羽根に100〜400mmの間隔で掻きだし可能なアングル型の掻き混ぜ具を設けている混合乾燥容器内では、200℃以下の温度でコントロールできるようにして、燃焼排ガスで火種の浮遊物の導入を防止するために、燃焼炉で出口付近に浮遊物回収の粉塵トラップとして、燃焼炉―熱交換部の出口付近の出口配管断面に対して3〜10倍の断面を持って給水可能なトラップ容器を設けるとともに、さらにガス中の微小浮遊物を除去・消滅させるために、排ガス送風の配管を径300mmφ以下で、3m以上の長さにして、前記容器の入口部と出口部で流量を両口部で調節的に供給並びに流通させながら、含水バイオマス燃料の破砕状体を流動的に掻き混ぜながら乾燥できるようにして、乾燥バイオマス燃料を粉体状態で燃焼装置にスクリューコンベアにて供給できるようにしていることを特徴とする請求項1に記載の含水バイオマス燃料を燃焼排ガスによる乾燥装置。The conveyor conveyor with vertical blades from the raw material storage tank with pulverizer is equipped with a spiral stirring arm blade, and the space between the blade and the wall of the mixing and drying vessel is 10 to 50 mm, and the stirring arm blade is 100 In a mixing and drying vessel provided with an angle-type stirrer that can be scraped at intervals of ˜400 mm, in order to prevent the introduction of fire-floating suspended matter in the combustion exhaust gas by enabling control at a temperature of 200 ° C. or lower. In addition, as a dust trap for the recovery of suspended matter in the vicinity of the outlet in the combustion furnace, a trap container capable of supplying water with a cross section of 3 to 10 times the cross section of the outlet pipe near the outlet of the combustion furnace-heat exchange section is provided. Further, in order to remove and eliminate the fine suspended matters in the gas, the exhaust gas blowing pipe has a diameter of 300 mmφ or less and a length of 3 m or more. While supplying and distributing the flow rate at both outlets in a controlled manner at the outlet, the crushed body of hydrous biomass fuel can be dried while being fluidly stirred, and the dried biomass fuel is screwed into the combustion device in a powder state. The apparatus for drying water-containing biomass fuel according to claim 1 using combustion exhaust gas, which is configured to be supplied by a conveyor. 排出、並びに供給の流量を調節できる二重ダンパー付配管は、燃焼炉―熱交換部で排出される燃焼排ガスを、前記粉塵トラップを経由して前記混合乾燥容器の原料入口部で、分岐配管にして、一方は直接に入口部に導入し、もう一方を出口部に導入して、分岐部では両配管に流量を調整できる二重ダンパーを設けて、前記容器内の入口部温度を200℃以下なるようにするために、両ダンパーの開閉度合によって両者の流量を調整的に流通させ、前記混合乾燥容器を通過した燃焼排ガスをサイクロンから煙道より排出することを特徴とする請求項1、又は請求項2に記載の含水バイオマス燃料を燃焼排ガスによる乾燥装置。A pipe with a double damper that can adjust the discharge and supply flow rate is a branch pipe that connects the combustion exhaust gas discharged from the combustion furnace-heat exchange section to the raw material inlet of the mixing and drying vessel via the dust trap. One is directly introduced into the inlet portion, the other is introduced into the outlet portion, and a double damper is provided in the branching section to adjust the flow rate in both pipes, and the inlet portion temperature in the container is 200 ° C. or less. In order to achieve this, the flow rates of both dampers are circulated in an adjusted manner according to the degree of opening and closing of both dampers, and the combustion exhaust gas that has passed through the mixing and drying container is discharged from a flue from a cyclone, or An apparatus for drying the hydrous biomass fuel according to claim 2 by combustion exhaust gas. 燃焼排ガス中に火種浮遊物の混入を防止できる粉塵トラップは、配管内の排出燃焼ガスの流速において、燃焼炉―熱交換部の出口付近に出口配管断面に対して3〜10倍の断面で、しかも底部に常時少量の水を補給できる円筒状粉塵トラップ容器にして、トラップ内の流速を配管内の通過流速の1/5〜1/10になるような容積になっていることを特徴とする請求項1〜請求項3のいずれかに記載の含水バイオマス燃料を燃焼排ガスによる乾燥装置。The dust trap that can prevent the mixture of suspended solids in the flue gas is 3-10 times the cross section of the outlet pipe near the outlet of the combustion furnace-heat exchange section at the flow rate of the exhaust combustion gas in the pipe. Moreover, it is a cylindrical dust trap container that can always replenish a small amount of water at the bottom, and has a volume that makes the flow rate in the trap 1/5 to 1/10 of the passage flow rate in the pipe. An apparatus for drying the hydrous biomass fuel according to any one of claims 1 to 3 by combustion exhaust gas.
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