JP2020132718A - Equipment for regeneration of wood pellet, and method therefor - Google Patents

Equipment for regeneration of wood pellet, and method therefor Download PDF

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JP2020132718A
JP2020132718A JP2019025818A JP2019025818A JP2020132718A JP 2020132718 A JP2020132718 A JP 2020132718A JP 2019025818 A JP2019025818 A JP 2019025818A JP 2019025818 A JP2019025818 A JP 2019025818A JP 2020132718 A JP2020132718 A JP 2020132718A
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powder
wood
hopper
wood pellets
water content
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淳 多田
Atsushi Tada
淳 多田
航 中野
Wataru Nakano
航 中野
英利 平井
Hidetoshi Hirai
英利 平井
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Ube Machinery Corp 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
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Abstract

To provide equipment for regeneration of a wood pellet, capable of improving operation efficiency of the whole equipment by eliminating deficits of the equipment caused due to powder generated when storing and conveying the wood pellet, and to provide a method therefor.SOLUTION: Equipment 10 of this invention for regeneration of a wood pellet includes: a storage hopper 20 in which powder generated in equipment for storing and conveying the wood pellet is collected; a water content-measuring hopper 30 for receiving the powder of the storage hopper 20 and then measuring a water content of the powder; water-adding means 40 for adding water to make the powder in the water content-measuring hopper 30 satisfy a predetermined water content; a molding material-storing hopper 50 for receiving the powder, the water content of which is adjusted to the predetermined amount and which is then stirred; and a molding machine 60 for producing the wood pellet by using the stored powder.SELECTED DRAWING: Figure 1

Description

本発明は、木質ペレットを受け入れ又は排出する貯蔵搬送設備に適用可能な木質ペレットの再生設備及びその方法に関する。 The present invention relates to a wood pellet recycling facility applicable to a storage and transportation facility that receives or discharges wood pellets, and a method thereof.

木質ペレットは、鋸屑や木材の粉砕物を圧縮成形して粒状にしたものであり、木材に含まれるリグニンを熱で融解して固着させることでペレット状に成形している。木質ペレットは、ペレット化することにより、輸送や貯蔵の取り扱いが容易となる。このようなバイオマス資源を用いた木質ペレットの主な用途は、化石燃料の代替燃料として利用されている。例えば、小型のペレットストーブから大規模な火力発電所用の燃料が挙げられる。近年、地球温暖化防止対策や循環型社会の形成等の観点から、バイオマス利用に対する諸制度が施行されてバイオマス発電設備が各地に設置されている。 Wood pellets are made by compression molding sawdust and crushed wood into granules, and are molded into pellets by melting and fixing lignin contained in wood with heat. Wood pellets can be easily transported and stored by pelletizing them. The main use of wood pellets using such biomass resources is as an alternative fuel to fossil fuels. For example, fuels for small pellet stoves to large thermal power plants. In recent years, from the viewpoint of measures to prevent global warming and the formation of a recycling-oriented society, various systems for biomass utilization have been enforced and biomass power generation facilities have been installed in various places.

図３は従来の木質ペレットの貯留搬送設備の説明図である。木質ペレット製造設備からトラックで搬送された木質ペレットは、スクリューコンベア１でペレット受け入れコンベア２に供給される。ペレット受け入れコンベア２の末端にはペレット貯蔵ホッパ３があり木質ペレットが一時的に貯蔵される。その後、排出コンベア４からボイラー等の燃料用として供給ラインへ搬出される。
木質ペレットは、木粉を成形したものであり、搬送過程において、コンベアや貯蔵ホッパ（タンクともいう）への投入時の衝撃や流動によって崩れて粉になってしまうものがある。受け入れする木質ペレットは、製造工場からの出荷、中間貯蔵、輸送時に一部が粉化して数％の粉が含まれている。この粉分が搬送コンベアや貯蔵ホッパの非流動エリアに溜まってしまう。木質ペレットを受け入れ又は排出するコンベアなどの搬送機械内で粉分が滞留や堆積すると、粉塵発生や搬送不能の問題が生じる。最悪の場合、機械搬送内で滞留して摩擦熱によって発火のおそれがある。このため定期的に設備を停止してメンテナンスしなければならない。木質ペレットは、木質原料の種類、水分、成形方法などによって粉の発生量が異なるが、ペレット成形時の粉分重量比は、一例として約１％以内である。貯蔵搬送によって、粉化すると装置内での舞い上がりによって想定外の箇所で滞留し、ベルト等に発生する静電気力と水分付着による持ち帰りで広範囲に亘って落粉などの量が増え、メンテナンスの頻度が増加してしまう。また粉分重量比が木質ペレット全体の５〜１０％になると、設備を停止して清掃と粉分回収作業を計画及び実施しなければならない。
特許文献１には、木質ペレット搬送時に発生する粉を搬送管外部の集積箱へ排出して装置を停止することがない木質ペレットの搬送装置が開示されている。
しかしながら、貯留搬送装置の場合、粉分が滞留する箇所は広範囲に亘って多数存在するため、そのような箇所に集積箱を設置することはコスト高となり粉分を効率的に回収することは難しい。 FIG. 3 is an explanatory diagram of a conventional storage and transportation facility for wood pellets. The wood pellets transported by truck from the wood pellet manufacturing facility are supplied to the pellet receiving conveyor 2 by the screw conveyor 1. There is a pellet storage hopper 3 at the end of the pellet receiving conveyor 2, and wood pellets are temporarily stored. After that, it is carried out from the discharge conveyor 4 to the supply line for fuel such as a boiler.
Wood pellets are formed by molding wood powder, and in the transport process, some wood pellets collapse into powder due to impact or flow when they are put into a conveyor or storage hopper (also called a tank). The accepted wood pellets are partially pulverized during shipment from the manufacturing plant, interim storage, and transportation, and contain a few percent of powder. This powder accumulates in the non-fluid area of the conveyor and storage hopper. If powder accumulates or accumulates in a transport machine such as a conveyor that accepts or discharges wood pellets, problems such as dust generation and inability to transport occur. In the worst case, it may stay in the machine and ignite due to frictional heat. Therefore, the equipment must be stopped and maintained on a regular basis. The amount of powder generated in wood pellets varies depending on the type of wood raw material, moisture, molding method, etc., but the powder weight ratio at the time of pellet molding is, for example, about 1% or less. When pulverized by storage and transportation, it stays in unexpected places due to soaring inside the device, and the amount of dust falling over a wide area increases due to the electrostatic force generated on the belt etc. and the take-out due to moisture adhesion, and the frequency of maintenance is high. It will increase. When the powder weight ratio reaches 5-10% of the total wood pellets, the equipment must be shut down to plan and carry out cleaning and powder recovery work.
Patent Document 1 discloses a wood pellet transport device that does not stop the device by discharging the powder generated during the transport of the wood pellets to the accumulation box outside the transport pipe.
However, in the case of the storage and transportation device, since there are many places where the powder stays over a wide area, it is costly to install the accumulation box in such places and it is difficult to collect the powder efficiently. ..

特開２０１５−５１８２９号公報Japanese Unexamined Patent Publication No. 2015-51829

本発明が解決しようとする課題は、上記従来技術の問題点に鑑み、木質ペレットの貯蔵又は搬送時に発生する粉分による設備の不具合を解消して設備全体の稼働効率を向上できる木質ペレットの再生設備及びその方法を提供することにある。 In view of the above-mentioned problems of the prior art, the problem to be solved by the present invention is the regeneration of wood pellets which can improve the operation efficiency of the entire equipment by eliminating the trouble of the equipment due to the powder generated during the storage or transportation of the wood pellets. The purpose is to provide equipment and methods thereof.

本発明は、上記課題を解決するための第１の手段として、木質ペレットの貯蔵搬送設備で発生した粉体を集めた貯蔵ホッパと、
前記貯蔵ホッパの前記粉体を受け入れて前記粉体の水分を測定する水分測定ホッパと、
前記水分測定ホッパの前記粉体が所定水分量を満たすように加水する加水手段と、
所定水分量に調整して攪拌された前記粉体を受け入れる成形材保管ホッパと、
保管した前記粉体を用いて木質ペレットを製造する成形機と、
を有することを特徴とする木質ペレットの再生設備を提供することにある。
上記第１の手段によれば、搬送設備の粉塵発生や発火トラブルを未然に防ぐことができる。また設備を停止してメンテナンス作業を行う頻度を少なくでき、稼働効率を向上できる。 The present invention provides, as a first means for solving the above problems, a storage hopper that collects powder generated in a storage and transportation facility for wood pellets.
A moisture measurement hopper that receives the powder of the storage hopper and measures the moisture content of the powder.
A watering means for adding water so that the powder of the water content measuring hopper satisfies a predetermined water content,
A molding material storage hopper that receives the powder that has been adjusted to a predetermined water content and stirred, and
A molding machine that produces wood pellets using the stored powder,
It is an object of the present invention to provide a reclaiming facility for wood pellets, which is characterized by having.
According to the first means, it is possible to prevent dust generation and ignition troubles in the transport equipment. In addition, the frequency of stopping equipment and performing maintenance work can be reduced, and operating efficiency can be improved.

本発明は、上記課題を解決するための第２の手段として、第１の手段において、前記成形材保管ホッパは、２つ以上のホッパを備えて交互に受け入れ又は排出するバッチ式であることを特徴とする木質ペレットの再生設備を提供することにある。
上記第２の手段によれば、粉体に水分を十分に馴染ませて均一に加水させることができる。また粉体全体に水分を与えているので粉塵発生を少なくできる。 According to the present invention, as a second means for solving the above-mentioned problems, in the first means, the molded material storage hopper is a batch type provided with two or more hoppers and alternately received or discharged. The purpose is to provide a reclaiming facility for wood pellets, which is a feature.
According to the second means, the powder can be sufficiently blended with water to uniformly add water. Moreover, since water is given to the entire powder, the generation of dust can be reduced.

本発明は、上記課題を解決するための第３の手段として、第１又は第２の手段において、前記成形機からの前記木質ペレットを受け入れる再生ペレット保管ホッパを備え、
前記再生ペレット保管ホッパは、ホッパ内を換気する換気手段を備えたことを特徴とする木質ペレットの再生設備を提供することにある。
上記第３の手段によれば、成形した後、発熱している木質ペレットを冷却して強度を高めることができる。また成形工程でペレットに付着した粉体を除去できる。 The present invention provides a recycled pellet storage hopper that receives the wood pellets from the molding machine in the first or second means as a third means for solving the above problems.
The regenerated pellet storage hopper is intended to provide a regenerating facility for wood pellets, which comprises a ventilation means for ventilating the inside of the hopper.
According to the third means, after molding, the heat-generating wood pellets can be cooled to increase the strength. In addition, the powder adhering to the pellets can be removed in the molding process.

本発明は、上記課題を解決するための第４の手段として、木質ペレットの貯蔵搬送設備で発生した粉体を集めて貯蔵する工程と、
貯蔵した前記粉体を所定水分量に調整する工程と、
前記粉体を用いて木質ペレットを再生する工程と、
を有することを特徴とする木質ペレットの再生方法を提供することにある。
上記第４の手段によれば、搬送設備の粉塵発生や発火トラブルを未然に防ぐことができる。また設備を停止してメンテナンス作業を行う頻度を少なくでき、稼働効率を向上できる。 According to the present invention, as a fourth means for solving the above problems, a step of collecting and storing powder generated in a storage and transportation facility for wood pellets and a step of storing the powder are provided.
A step of adjusting the stored powder to a predetermined water content and
The process of regenerating wood pellets using the powder and
It is an object of the present invention to provide a method for regenerating wood pellets, which is characterized by having.
According to the fourth means, it is possible to prevent dust generation and ignition troubles in the transport equipment. In addition, the frequency of stopping equipment and performing maintenance work can be reduced, and operating efficiency can be improved.

本発明は、上記課題を解決するための第５の手段として、木質ペレットの貯蔵搬送設備で発生した粉体を集めて貯蔵する工程と、
貯蔵した前記粉体の水分を測定する工程と、
水分測定した前記粉体が所定水分量に満たない場合に加水する工程と、
所定水分量の前記粉体を攪拌する工程と、
攪拌された前記粉体を保管する工程と、
保管した前記粉体を用いて木質ペレットを再生する工程と、
を有することを特徴とする木質ペレットの再生方法を提供することにある。
上記第５の手段によれば、搬送設備の粉塵発生や発火トラブルを未然に防ぐことができる。また設備を停止してメンテナンス作業を行う頻度を少なくでき、稼働効率を向上できる。 According to the present invention, as a fifth means for solving the above problems, a step of collecting and storing powder generated in a storage and transportation facility for wood pellets and a step of storing the powder are provided.
The process of measuring the water content of the stored powder and
A step of adding water when the water content of the powder is less than a predetermined amount of water, and
A step of stirring the powder having a predetermined amount of water and
The process of storing the agitated powder and
The process of regenerating wood pellets using the stored powder and
It is an object of the present invention to provide a method for regenerating wood pellets, which is characterized by having.
According to the fifth means, it is possible to prevent dust generation and ignition troubles in the transport facility. In addition, the frequency of stopping equipment and performing maintenance work can be reduced, and operating efficiency can be improved.

本発明は、上記課題を解決するための第６の手段として、第５の手段において、攪拌された前記粉体を保管する工程は、
２つ以上のホッパを用いて交互に受け入れ又は排出することを特徴とする木質ペレットの再生方法を提供することにある。
上記第６の手段によれば、粉体に水分を十分に馴染ませて均一に加水させることができる。また粉体全体に水分を与えているので粉塵発生を少なくできる。 In the present invention, as a sixth means for solving the above problems, the step of storing the agitated powder in the fifth means is
It is an object of the present invention to provide a method for regenerating wood pellets, which comprises alternately receiving or discharging wood pellets using two or more hoppers.
According to the sixth means, the powder can be sufficiently blended with water to uniformly add water. Moreover, since water is given to the entire powder, the generation of dust can be reduced.

本発明によれば、木質ペレットの受入れ、貯蔵、排出設備において、粉化する割合が高い木質ペレットの受入れホッパの下流側に再生設備を設けることにより、搬送設備の粉塵発生や発火トラブルを未然に防ぐことができる。また設備を停止してメンテナンス作業を行う頻度を少なくでき、稼働効率を向上できる。 According to the present invention, in the receiving, storing, and discharging equipment for wood pellets, by providing a recycling equipment on the downstream side of the receiving hopper for wood pellets having a high rate of pulverization, dust generation and ignition troubles in the transport equipment can be prevented. Can be prevented. In addition, the frequency of stopping equipment and performing maintenance work can be reduced, and operating efficiency can be improved.

本発明の木質ペレットの再生設備の説明図である。It is explanatory drawing of the recycling equipment of the wood pellet of this invention. 本発明の木質ペレットの再生方法の処理フローである。It is a processing flow of the method of regenerating the wood pellet of this invention. 従来の木質ペレットの貯留及び搬送設備の説明図である。It is explanatory drawing of the storage and transportation equipment of the conventional wood pellets.

本発明の木質ペレットの再生設備及びその方法の実施形態について、図面を参照しながら、以下詳細に説明する。
［木質ペレットの再生設備１０］
図１は、本発明の木質ペレットの再生設備の説明図である。
本発明の木質ペレットの再生設備１０は、木質ペレットの貯蔵搬送設備で発生した粉体を集めた貯蔵ホッパ２０と、前記貯蔵ホッパ２０の前記粉体を受け入れて前記粉体の水分を測定する水分測定ホッパ３０と、前記水分測定ホッパ３０の前記粉体が所定水分量を満たすように加水する加水手段４０と、前記所定水分量に調整して攪拌された前記粉体を受け入れる成形材保管ホッパ５０と、保管した前記粉体を用いて木質ペレットを製造する成形機６０と、前記成形機６０からの前記木質ペレットを受け入れる再生ペレット保管ホッパ７０と、を備えている。
本発明の木質ペレットの再生設備１０は、木質ペレットの受入れ、貯蔵、排出設備において、粉化する割合が高い木質ペレットの受入れホッパの下流側に設けている。 The wood pellet recycling equipment of the present invention and embodiments of the method thereof will be described in detail below with reference to the drawings.
[Wood pellet recycling equipment 10]
FIG. 1 is an explanatory diagram of a wood pellet recycling facility of the present invention.
The wood pellet recycling equipment 10 of the present invention has a storage hopper 20 that collects powder generated in the wood pellet storage and transportation equipment, and a water content that receives the powder of the storage hopper 20 and measures the water content of the powder. The measuring hopper 30, the water addition means 40 for adding water so that the powder of the water content measuring hopper 30 satisfies a predetermined water content, and the molding material storage hopper 50 for receiving the powder adjusted to the predetermined water content and stirred. A molding machine 60 for producing wood pellets using the stored powder, and a recycled pellet storage hopper 70 for receiving the wood pellets from the molding machine 60 are provided.
The wood pellet recycling facility 10 of the present invention is provided on the downstream side of the wood pellet receiving hopper, which has a high rate of pulverization in the wood pellet receiving, storing, and discharging equipment.

貯蔵ホッパ２０は、トラックや搬送コンベアによって搬送された木質ペレットを受け入れる際、後段の燃焼設備のスクリューコンベア１に排出される木質ペレットと分離された粉体を集めて一時貯蔵するホッパ（タンク）である。貯蔵ホッパ２０は、後段の再生工程で成形材が不足しないように、粉体が所定量溜まったら間欠的に排出するように制御されている。
水分測定ホッパ３０は、貯蔵ホッパ２０から排出される粉体を一時貯蔵し、ホッパ内の粉体の水分測定を行うホッパである。
木質ペレットが粉化した粉体は、一旦ペレットに成形された木粉であり、粉体サイズと水分のばらつきは少ない。このため、あらかじめ測定した粉体の水分量に対する再成形に必要な水分を加えれば良い。具体的には、水分測定ホッパ３０に溜まった粉体重量を計量する。そして後述する加水手段４０によって木粉重量に応じた水分を加水する。この他、測定値の信頼性を向上する目的で、搬送途中に電気式水分計を設置しても良い。例えば、木粉の電気抵抗を含水率に変換する方式（あらかじめ木粉や木チップなどの形状の異なる測定物の抵抗特性を補正する係数を加味して電気抵抗値から含水率を求める。）の電気抵抗式水分計を用いて連続的かつ短時間で測定しても良い。
加水手段４０は、水分測定ホッパ３０に接続してホッパ内の粉体を加水する給水管等である。加水手段４０は、流量制御バルブにより流量を任意に調整でき、所定水分量の粉体となるように水分を制御できる。このような加水手段４０により、木質ペレットの製造時に水分が少なくなっている粉体にペレット化に必要な所定量の水分を付与できる。
水分測定ホッパ３０でペレット化に必要な所定水分量に調整された粉体は、撹拌機（ミキサともいう）４２に排出されて攪拌される。
なお加水手段４０は、撹拌機４２に接続させて攪拌中の粉体に加水しても良い。 The storage hopper 20 is a hopper (tank) that collects and temporarily stores the powder separated from the wood pellets discharged to the screw conveyor 1 of the combustion equipment in the subsequent stage when receiving the wood pellets conveyed by the truck or the conveyor. is there. The storage hopper 20 is controlled so that when a predetermined amount of powder is accumulated, it is intermittently discharged so that the molding material is not insufficient in the subsequent regeneration step.
The moisture measurement hopper 30 is a hopper that temporarily stores the powder discharged from the storage hopper 20 and measures the moisture content of the powder in the hopper.
The powder obtained by pulverizing wood pellets is wood powder once formed into pellets, and there is little variation in powder size and water content. Therefore, the water content required for remolding may be added to the water content of the powder measured in advance. Specifically, the weight of the powder accumulated in the moisture measurement hopper 30 is weighed. Then, water is added according to the weight of the wood flour by the watering means 40 described later. In addition, an electric moisture meter may be installed during transportation for the purpose of improving the reliability of the measured value. For example, a method of converting the electrical resistance of wood powder into a moisture content (the moisture content is obtained from the electrical resistance value by adding a coefficient for correcting the resistance characteristics of measured objects having different shapes such as wood flour and wood chips in advance). It may be measured continuously and in a short time using an electric resistance type moisture meter.
The water adding means 40 is a water supply pipe or the like connected to the water content measuring hopper 30 to add water to the powder in the hopper. The water flow rate can be arbitrarily adjusted by the flow rate control valve, and the water content can be controlled so as to be a powder having a predetermined water content. By such a water addition means 40, it is possible to impart a predetermined amount of water required for pelletization to the powder having a low water content during the production of wood pellets.
The powder adjusted to a predetermined water content required for pelletization by the water content measurement hopper 30 is discharged to a stirrer (also referred to as a mixer) 42 and stirred.
The water addition means 40 may be connected to the stirrer 42 to add water to the powder being stirred.

成形材保管ホッパ５０は、２つ以上のホッパからなり、前段の撹拌機から排出される粉体をホッパ毎に所定量ずつ分けて保管される。成形材保管ホッパ５０は、交互に粉体の受け入れと排出を行うバッチ式運転を採用している。このような構成の成形材保管ホッパ５０は、粉体に水分を十分に馴染ませて均一に加水させることができる。また粉体全体に水分を与えているので粉塵発生を少なくできる。なお、成形材保管ホッパ５０は後段の成形機６０に粉体を供給するためのホッパである。
成形機６０は、ダイスと呼ばれる金属製の円筒形の小さな孔を備え、原料となる粉体を圧入して成形し木質ペレットを製造するものである。成形機６０は、圧縮時に円筒形の小さな孔の内壁との摩擦力によって摩擦熱と原料粉体中の水分によって、木中の糖類やリグニンが熱で軟化して可塑化できる。そして小孔から押し出された直後の高密度のペレットは冷やされて固くなる。 The molding material storage hopper 50 is composed of two or more hoppers, and the powder discharged from the stirrer in the previous stage is stored in a predetermined amount for each hopper. The molding material storage hopper 50 employs a batch operation in which powders are alternately received and discharged. The molding material storage hopper 50 having such a structure can sufficiently blend water into the powder and uniformly add water. Moreover, since water is given to the entire powder, the generation of dust can be reduced. The molding material storage hopper 50 is a hopper for supplying powder to the molding machine 60 in the subsequent stage.
The molding machine 60 is provided with small metal cylindrical holes called dies, and is formed by press-fitting powder as a raw material to produce wood pellets. In the molding machine 60, sugars and lignin in wood can be softened and plasticized by heat due to frictional heat and moisture in the raw material powder due to frictional force with the inner wall of small cylindrical holes during compression. The high-density pellets immediately after being extruded from the small holes are cooled and hardened.

再生ペレット保管ホッパ７０は、成形機６０で粉体を再生して成形された木質ペレットを一時保管するホッパである。再生ペレット保管ホッパ７０は、ホッパ内壁に換気手段８０の給気口７４と、排気口７６を備えたサイクロン方式を採用している。換気手段８０は、空気の給気管８２と、空気の排気管８４と、ファン８６（送風又は排気ファンを採用できる。図１は排気ファンを採用）を備えホッパ内に空気を供給している。このような構成の再生ペレット保管ホッパ７０は、成形機６０で成形された木質ホッパを受け入れた後、換気手段８０によってホッパ内が換気される。このとき成形した後に発熱している木質ペレットを冷却して強度を高めることができる。また成形工程でペレットに付着した粉体を除去できる。
また再生ペレット保管ホッパ７０は保管された木質ペレットを燃焼設備に供給するスクリューコンベア１や搬送コンベアへ排出できる。 The recycled pellet storage hopper 70 is a hopper that temporarily stores wood pellets formed by regenerating powder with a molding machine 60. The recycled pellet storage hopper 70 employs a cyclone system in which the air supply port 74 of the ventilation means 80 and the exhaust port 76 are provided on the inner wall of the hopper. The ventilation means 80 includes an air supply pipe 82, an air exhaust pipe 84, and a fan 86 (a blower or an exhaust fan can be adopted. An exhaust fan is adopted in FIG. 1) to supply air into the hopper. The regenerated pellet storage hopper 70 having such a configuration receives the wood hopper molded by the molding machine 60, and then the inside of the hopper is ventilated by the ventilation means 80. At this time, the wood pellets that generate heat after molding can be cooled to increase the strength. In addition, the powder adhering to the pellets can be removed in the molding process.
Further, the recycled pellet storage hopper 70 can discharge the stored wood pellets to the screw conveyor 1 or the conveyor that supplies the stored wood pellets to the combustion equipment.

［木質ペレットの再生方法］
上記構成による本発明の木質ペレットの再生方法について、以下説明する。
図２は本発明の木質ペレットの再生方法の処理フローである。
（粉体貯蔵）ステップ１
トラックや搬送コンベアによって搬送された木質ペレットを受け入れる際、後段の燃焼設備のスクリューコンベア１に排出される木質ペレットと分離された粉体を貯蔵ホッパ２０に集めて一時貯蔵する。
（粉体の水分測定）ステップ２
貯蔵ホッパ２０から排出される粉体を水分測定ホッパ３０で一時貯蔵し、ホッパ内の粉体の水分測定を行う。粉体は、木質ペレットの製造時において水分が少なくなっている。ペレット化に必要な所定水分量となるように粉体全体に加水手段４０で加水する。 [How to regenerate wood pellets]
The method for regenerating the wood pellet of the present invention according to the above constitution will be described below.
FIG. 2 is a processing flow of the method for regenerating wood pellets of the present invention.
(Powder storage) Step 1
When receiving the wood pellets conveyed by the truck or the conveyor, the powder separated from the wood pellets discharged to the screw conveyor 1 of the combustion equipment in the subsequent stage is collected in the storage hopper 20 and temporarily stored.
(Measurement of water content of powder) Step 2
The powder discharged from the storage hopper 20 is temporarily stored in the moisture measurement hopper 30, and the moisture content of the powder in the hopper is measured. The powder is low in water during the production of wood pellets. Water is added to the entire powder by the water addition means 40 so as to have a predetermined water content required for pelletization.

（攪拌）ステップ３
水分測定ホッパ３０で所定水分量に調整された粉体を撹拌機４２へ排出し、攪拌する。
（成形材保管）ステップ４
撹拌機４２から排出される粉体を成形材保管ホッパ５０のホッパ毎に所定量ずつ分けて保管する。成形材保管ホッパ５０は、交互に粉体の受け入れと排出を行うバッチ式運転を採用しており、粉体に水分を十分に馴染ませて均一に加水させることができる。また粉体全体に水分を与えているので粉塵発生を少なくできる。 (Stirring) Step 3
The powder adjusted to a predetermined water content by the water content measurement hopper 30 is discharged to the stirrer 42 and stirred.
(Storage of molded material) Step 4
The powder discharged from the stirrer 42 is stored in a predetermined amount for each hopper of the molding material storage hopper 50. The molding material storage hopper 50 employs a batch operation in which powders are alternately received and discharged, and the powders can be sufficiently blended with water to uniformly add water. Moreover, since water is given to the entire powder, the generation of dust can be reduced.

（ペレット成形）ステップ５
成形機６０のダイスと呼ばれる金属製の円筒形の小さな孔に原料となる粉体を圧入して成形し木質ペレットを製造する。この際、圧縮時に円筒形の小さな孔の内壁との摩擦力によって摩擦熱と原料粉体中の水分によって、木中の糖類やリグニンが熱で軟化して可塑化できる。
（再生ペレット保管）ステップ６
成形機６０で粉体を再生して成形された木質ペレットを再生ペレット保管ホッパ７０で一時保管する。再生ペレット保管ホッパ７０はホッパ内壁に換気手段８０の給気口７４と、排気口７６を備えたサイクロン方式を採用しており、成形された木質ホッパを受け入れた後、換気手段８０によってホッパ内が換気される。このとき成形した後に発熱している木質ペレットを冷却して強度を高めることができる。また成形工程でペレットに付着した粉体を除去できる。
また再生ペレット保管ホッパ７０は保管された木質ペレットを燃焼設備に供給するスクリューコンベア１や搬送コンベアへ排出できる。 (Pellet molding) Step 5
A powder as a raw material is press-fitted into a small metal cylindrical hole called a die of a molding machine 60 to form a wood pellet. At this time, during compression, the frictional force with the inner wall of the small cylindrical hole causes the frictional heat and the moisture in the raw material powder to soften and plasticize the sugars and lignin in the wood.
(Recycled pellet storage) Step 6
The wood pellets formed by regenerating the powder with the molding machine 60 are temporarily stored in the regenerated pellet storage hopper 70. The recycled pellet storage hopper 70 employs a cyclone system in which the air supply port 74 of the ventilation means 80 and the exhaust port 76 are provided on the inner wall of the hopper, and after receiving the molded wood hopper, the inside of the hopper is filled with the ventilation means 80. Be ventilated. At this time, the wood pellets that generate heat after molding can be cooled to increase the strength. In addition, the powder adhering to the pellets can be removed in the molding process.
Further, the recycled pellet storage hopper 70 can discharge the stored wood pellets to the screw conveyor 1 or the conveyor that supplies the stored wood pellets to the combustion equipment.

このような本発明の木質ペレットの再生設備及びその方法によれば、木質ペレットの受入れ、貯蔵、排出設備において、粉化する割合が高い木質ペレットの受入れホッパの下流側に再生設備を設けることにより、搬送設備の粉塵発生や発火トラブルを未然に防ぐことができる。また設備を停止してメンテナンス作業を行う頻度を少なくでき、稼働効率を向上できる。また、粉塵発生による不都合を解消できる。そして狭いコンベア内の清掃作業の頻度を少なくでき、火災発生のリスクがなくなる。
以上、本発明の好ましい実施形態について説明した。しかしながら、本発明は、上記実施形態に何ら制限されることなく、本発明の主旨を逸脱しない範囲において、種々の変更が可能である。
また、本発明は、実施形態において示された組み合わせに限定されることなく、種々の組み合わせによって実施可能である。 According to such a wood pellet recycling facility of the present invention and the method thereof, in the wood pellet receiving, storage, and discharging facilities, a recycling facility is provided on the downstream side of the wood pellet receiving hopper having a high dusting ratio. , It is possible to prevent the generation of dust and ignition troubles in the transportation equipment. In addition, the frequency of stopping equipment and performing maintenance work can be reduced, and operating efficiency can be improved. In addition, the inconvenience caused by the generation of dust can be eliminated. The frequency of cleaning work in a narrow conveyor can be reduced, and the risk of fire is eliminated.
The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
Further, the present invention is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

本発明の木質ペレットの再生設備及びその方法は、特にバイオマス資源の製造分野において産業上の利用可能性を有する。 The wood pellet recycling equipment of the present invention and the method thereof have industrial applicability especially in the field of producing biomass resources.

１ スクリューコンベア
２ ペレット受け入れコンベア
３ ペレット貯蔵ホッパ
４ 排出コンベア
１０ 木質ペレットの再生設備
２０ 貯蔵ホッパ
３０ 水分測定ホッパ
４０ 加水手段
４２ 撹拌機
５０ 成形材保管ホッパ
６０ 成形機
７０ 再生ペレット保管ホッパ
７４ 給気口
７６ 排気口
８０ 換気手段
８２ 給気管
８４ 排気管
８６ ファン
1 Screw conveyor 2 Pellet receiving conveyor 3 Pellet storage hopper 4 Discharge conveyor 10 Wood pellet recycling equipment 20 Storage hopper 30 Moisture measurement hopper 40 Watering means 42 Stirrer 50 Molding material storage hopper 60 Molding machine 70 Recycled pellet storage hopper 74 Air supply port 76 Exhaust port 80 Ventilation means 82 Air supply pipe 84 Exhaust pipe 86 Fan

Claims (6)

木質ペレットの貯蔵搬送設備で発生した粉体を集めた貯蔵ホッパと、
前記貯蔵ホッパの前記粉体を受け入れて前記粉体の水分を測定する水分測定ホッパと、
前記水分測定ホッパの前記粉体が所定水分量を満たすように加水する加水手段と、
前記所定水分量に調整して攪拌された前記粉体を受け入れる成形材保管ホッパと、
保管した前記粉体を用いて木質ペレットを製造する成形機と、
を有することを特徴とする木質ペレットの再生設備。 A storage hopper that collects powder generated in the storage and transportation facility for wood pellets,
A moisture measurement hopper that receives the powder of the storage hopper and measures the moisture content of the powder.
A watering means for adding water so that the powder of the water content measuring hopper satisfies a predetermined water content,
A molding material storage hopper that receives the powder that has been adjusted to a predetermined water content and stirred.
A molding machine that produces wood pellets using the stored powder,
A wood pellet recycling facility characterized by having. 請求項１に記載された木質ペレットの再生設備であって、
前記成形材保管ホッパは、２つ以上のホッパを備えて交互に受け入れ又は排出するバッチ式であることを特徴とする木質ペレットの再生設備。 The wood pellet recycling equipment according to claim 1.
The molded material storage hopper is a wood pellet recycling facility characterized in that it is provided with two or more hoppers and is of a batch type that alternately receives or discharges. 請求項１又は２に記載された木質ペレットの再生設備であって
前記成形機からの前記木質ペレットを受け入れる再生ペレット保管ホッパを備え、
前記再生ペレット保管ホッパは、ホッパ内を換気する換気手段を備えたことを特徴とする木質ペレットの再生設備。 The wood pellet recycling equipment according to claim 1 or 2, further comprising a recycled pellet storage hopper that receives the wood pellets from the molding machine.
The recycled pellet storage hopper is a wood pellet recycling facility provided with a ventilation means for ventilating the inside of the hopper. 木質ペレットの貯蔵搬送設備で発生した粉体を集めて貯蔵する工程と、
貯蔵した前記粉体を所定水分量に調整する工程と、
前記粉体を用いて木質ペレットを再生する工程と、
を有することを特徴とする木質ペレットの再生方法。 The process of collecting and storing the powder generated in the storage and transportation facility for wood pellets,
A step of adjusting the stored powder to a predetermined water content and
The process of regenerating wood pellets using the powder and
A method for regenerating wood pellets, which comprises having. 木質ペレットの貯蔵搬送設備で発生した粉体を集めて貯蔵する工程と、
貯蔵した前記粉体の水分を測定する工程と、
水分測定した前記粉体が所定水分量に満たない場合に加水する工程と、
所定水分量の前記粉体を攪拌する工程と、
攪拌された前記粉体を保管する工程と、
保管した前記粉体を用いて木質ペレットを再生する工程と、
を有することを特徴とする木質ペレットの再生方法。 The process of collecting and storing the powder generated in the storage and transportation facility for wood pellets,
The process of measuring the water content of the stored powder and
A step of adding water when the water content of the powder is less than a predetermined amount of water, and
A step of stirring the powder having a predetermined amount of water and
The process of storing the agitated powder and
The process of regenerating wood pellets using the stored powder and
A method for regenerating wood pellets, which comprises having. 請求項５に記載の木質ペレットの再生方法であって、
攪拌された前記粉体を保管する工程は、
２つ以上のホッパを用いて交互に受け入れ又は排出することを特徴とする木質ペレットの再生方法。 The method for regenerating wood pellets according to claim 5.
The step of storing the agitated powder is
A method for regenerating wood pellets, which comprises alternately accepting or discharging using two or more hoppers.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004269234A (en) * 2003-03-12 2004-09-30 Jfe Engineering Kk Hopper with dust collecting function
JP2004292787A (en) * 2003-03-07 2004-10-21 Ube Techno Enji Kk Method for producing plant pellet, apparatus for the same, and method for producing plant mixed fuel
KR100901792B1 (en) * 2008-05-30 2009-06-25 (주)건조기술 Lumber pelet manufacture device and it's process
JP2011084713A (en) * 2009-10-16 2011-04-28 Sk Forest Co Ltd Woody pellet manufacturing method
JP2012188556A (en) * 2011-03-10 2012-10-04 Shigemi Hijiguro Method for producing bamboo pellet fuel
JP2013255891A (en) * 2012-06-13 2013-12-26 Inoue Densetsu Kk Apparatus for cooling, sieving and transporting pellet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004292787A (en) * 2003-03-07 2004-10-21 Ube Techno Enji Kk Method for producing plant pellet, apparatus for the same, and method for producing plant mixed fuel
JP2004269234A (en) * 2003-03-12 2004-09-30 Jfe Engineering Kk Hopper with dust collecting function
KR100901792B1 (en) * 2008-05-30 2009-06-25 (주)건조기술 Lumber pelet manufacture device and it's process
JP2011084713A (en) * 2009-10-16 2011-04-28 Sk Forest Co Ltd Woody pellet manufacturing method
JP2012188556A (en) * 2011-03-10 2012-10-04 Shigemi Hijiguro Method for producing bamboo pellet fuel
JP2013255891A (en) * 2012-06-13 2013-12-26 Inoue Densetsu Kk Apparatus for cooling, sieving and transporting pellet

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