JP2004292787A - Method for producing plant pellet, apparatus for the same, and method for producing plant mixed fuel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for effectively producing plant fuel pellets by which a plant raw material is effectively utilized as thermal energy and which is used as a substitute fuel for coal. <P>SOLUTION: The apparatus for producing the pellets has a quantitatively supplying means for supplying the preliminarily crushed plant raw material and a vertical grinder 32 which is positioned in a downstream area of the quantitatively supplying means, has a rotary grinding table 36 and grinding rollers 40 rotating on an upper surface of the table, and operates to blow a gas from an outer peripheral edge of the rotary grinding table 36. Further, a two-stage classifying rotary separator 44 is positioned in an upper space of the vertical grinder 32 so that a ground material accompanied by the gas is classified into a fine powder component and a coarse powder component, then the coarse powder component is returned to the grinding table 36, and simultaneously the gas containing the fine powder component is discharged. Furthermore, the apparatus has a dust collector 58 which takes out a ground material comprising the fine powder component of the gas separated from the two-stage classifying rotary separator 44 and a pelletizer 62 into which the fine powder component discharged from the dust collector 58 is introduced and which continuously forms the fine powder component into the pellets having a prescribed shape. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method and an apparatus for producing plant pellets and a method for producing a plant-mixed fuel, and more particularly to a method for effectively utilizing a plant made of grasses including thinned wood, wood waste, wood chips, etc., and kenaf as a coal alternative fuel. The present invention relates to a production method and apparatus for pelletizing into a mixture and a method for producing a plant mixed fuel.

  Thinned wood generally generated in the forest was left in the forest and was not used at all. However, waste wood, wood chips, coconut husks and the like, including thinned wood, can be used as an alternative fuel to coal, and can be used as fuel by pulverizing them into wood pellets. Conventionally, in order to produce the pellets, the above-mentioned wood materials are sorted by size to remove foreign matter, then coarsely crushed and dried, further crushed, and then formed into pellets of a predetermined shape. The method is adopted.

  FIG. 6 shows a configuration in which the wood pellet manufacturing facilities are arranged in the order of steps. As shown in the drawing, firstly, primary crushed wood chips and the like are transported by a truck, weighed by a truck scale 1, and deposited in a stock yard. It is put into the fixed amount supply device 2 by a heavy machine such as a shovel car, and wood chips that are too large or too small to be treated are sieved and removed by the raw material screen 3. Next, sediment and other foreign matter are removed by the wind separator 4, and iron pieces and the like are removed by the magnet separator 5. After the completion of such pretreatment, the secondary crusher 6 crushes the powder to a size of 12 mm or less. This is supplied to a dryer 9 to which a hot air generator 8 is connected by a fixed amount extracting device 7, and is dried so that the water content becomes 12% or less. The chips from which the moisture has been removed by the drying treatment are more easily crushed. Therefore, the chips are introduced by the tertiary crusher 11 for the final crushing treatment and crushed to a size of 6 mm or less. Then, the crushed chips are supplied to a pellet forming machine 13, where they are formed into cylindrical pellets having a diameter of about 6 to 12 mm and a length of about 20 mm. After that, the pellets are cooled to near normal temperature by the cooler 14, stored in the storage silo 16 via the pellet screen 15, and shipped out by paying out a necessary amount as appropriate.

In addition, there exists patent document 1 about the wood-based composition for shaping | molding for aiming at effective utilization of waste materials, etc., and its manufacturing method.
JP 2002-225011 A

  However, in the above-mentioned conventional method, wood chips and the like are firstly crushed and carried into the pellet manufacturing equipment, but a very large number of pretreatment steps are required until the waste is supplied to the pellet forming equipment, and most of the equipment power is pretreated. There was a problem of being consumed. As shown in FIG. 6, foreign matter removal and sorting are performed before the drying for pulverization, and a large amount of equipment power is consumed in the drying and subsequent tertiary pulverization. Therefore, the size of the equipment can be reduced by simplifying the pretreatment leading to the pellet forming apparatus, and the power consumption can be reduced at the same time.

  On the other hand, kenaf, which is an annual plant of the genus Hibiscus of the Malvaceae family, has recently been used as a pulp resource instead of wood. The kenaf stem is composed of a bast part of plant fiber of the stem bark and a woody part at the center of the stem, and has different properties. The bast portion contains a large amount of plant fiber and has excellent strength, and is used for paper, nonwoven fabric, and the like. The wood part is mechanically cut, crushed, and pulverized by a wood cutting machine or the like, and then subjected to secondary processing to be used as a building material or the like.

  In addition, kenaf grows very fast, has a large amount of plant fiber per unit area, and can produce many crops in a short period of time. In addition, it is cultivated in a wide range because of easy cultivation. Therefore, kenaf can be obtained at lower cost than wood.

  The present invention has been made in view of the above problems, and is made up of grass including kenaf, which has been used as a pulp resource instead of wood, such as thinned wood or wood waste, which has been treated as scrap. It is an object of the present invention to provide a method and an apparatus capable of effectively utilizing plants as heat energy and producing plant pellets as a fuel that can be used as an alternative fuel to coal with simple equipment at low cost.

  First, the present invention has been obtained based on the following findings. That is to say, a pre-pulverized wood waste material, a thinned wood material, a wood chip, etc., having a low density and elasticity, are efficiently cut and pulverized by a vertical pulverizer (roller mill), and simultaneously dried and pulverized once. It has been obtained from the knowledge that by preparing conditions for forming a pellet by processing, multi-step processing and equipment can be eliminated.

From such findings, the method for producing plant pellets according to the present invention provides a pre-crushed plant material to a grinding table of a vertical grinding machine with a classifying rotary separator, and the plant material is driven by rotation of the grinding table. Pulverized by a rotating roller and discharged from the outer periphery of the pulverizing table, the pulverized material is dried and transported by a gas ejected from below the outer periphery of the pulverizing table, and introduced into a classifying rotary separator disposed above the pulverizing table. The fine powder component and the coarse powder component are classified and the coarse powder component is returned to the crushing table. The fine powder component is discharged together with the gas outside the crusher to separate the fine powder component from the gas, and then supplied to the pellet forming machine. By doing so, it is possible to solve the above-mentioned problem by forming a pellet having a constant shape by continuously molding it.
In addition, a vertical pulverizer capable of cutting and pulverizing a raw material containing a large amount of plant fiber, such as kenaf, is used.

  Further, the apparatus for producing plant pellets according to the present invention comprises a means for quantitatively supplying preliminarily crushed plant material, a rotary grinding table disposed downstream of the quantitative supply means, a grinding roller rotating on the upper surface thereof, and A vertical pulverizer that ejects gas from the periphery, and a pulverized material disposed above the vertical pulverizer and accompanied by the gas is classified into a fine powder component and a coarse powder component, and the coarse powder component is returned to the table. A classifying rotary separator that discharges gas containing fine powder components, a dust collector that extracts pulverized material of fine powder components from the gas separated from the classifying rotary separator, and a fine shape component that introduces fine powder components discharged from the dust collector. A molding machine for continuously molding the pellets.

  The method for producing a plant-mixed fuel according to the present invention comprises supplying a plant-mixed material obtained by adding a paper material to a pre-crushed plant material and adjusting the water content to a pulverizing table of a vertical pulverizer equipped with a classifying rotary separator, and pulverizing Pulverized by a roller driven by rotation of the table, discharged from the outer periphery of the pulverizing table, and the pulverized material is dried and transported by a gas ejected from below the outer periphery of the pulverizing table, and a pulverized product separated from the gas is manufactured as a fuel. It is characterized by the following.

  According to the above configuration, thinned wood, wood chips, waste materials, and the like are preliminarily crushed by primary crushing and carried into the pellet manufacturing facility. After being temporarily stored in the storage, the primary crushed plant material is continuously supplied to the vertical mill by the quantitative supply means. It has a rotating pulverizing table and a pulverizing roller which rolls on it. The raw material supplied on the pulverizing table is pulverized by the relative rotation of the pulverizing table and the pulverizing roller. Although the pulverized material tends to spill from the outer periphery of the pulverizing table, the gas blows up from the outer periphery of the table and is conveyed upward. The classifying rotary separator placed above selects only the pulverized material of the appropriate pulverized size.If the pulverized material has not been pulverized, return it to the original pulverizing table and only the pulverized material Discharge outside the machine. A dust collector is placed at the discharge destination, where the pulverized material is separated and supplied to the molding machine. In a molding machine, it is put into a fixed mold and solidified by the action of lignin by heat treatment, so that plant pellets can be continuously produced. A raw material having vegetable fibers such as kenaf is cut and pulverized by a cutting function accompanying the pulverization of the vertical pulverizer.

  According to the method and apparatus for producing plant pellets and the method for producing a plant blended fuel of the present invention, a plant material consisting of grass containing pre-crushed thinned wood, wood chips, waste wood, and kenaf is vertically pulverized with a classifying rotary separator. The plant raw material is supplied to a pulverizing table, and the plant raw material is pulverized by a plurality of rollers rotating following the rotation of the pulverizing table, discharged from the outer periphery of the pulverizing table, and the pulverized material is dried by gas ejected from below the outer periphery of the pulverizing table. • Conveyed, introduced into a classifying rotary separator disposed above the crushing table, classified into fine powder components and coarse powder components, and returning the coarse powder components onto the crushing table; After discharging to the outside together with the gas and separating the fine powder component from the gas, it can be manufactured by continuously forming pellets of a certain shape by supplying it to a pellet forming machine. To become. Therefore, it becomes possible to substitute thinned wood, waste wood, plants made of grass including kenaf, etc. with fossil fuels for burning in boilers and cement kilns. By using inexpensive kenaf as a plant material, plant pellets can be produced at low cost. Further, a paper raw material obtained by adding used paper or recycled paper to the plant raw material can be used as a ground product using a vertical mill with a classifying rotary separator, and the ground product can be used as a plant mixed fuel for combustion. In addition, this plant mixed fuel can be used secondarily as wood flour such as for pellet production and compost raw materials. Furthermore, since the fuel can be utilized as a general fuel, the effect that the plant material can be reused as an effective energy source can be obtained.

Hereinafter, specific embodiments of the method and apparatus for producing a plant pellet and the method for producing a plant mixed fuel according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a plant pellet manufacturing apparatus according to an embodiment arranged in the order of steps. First, primary crushing of a plant made of grass including thinned wood, wood chips, waste wood, and kenaf as raw materials will be described with reference to the flowchart of FIG. As shown in FIG. 7, a wood material composed of thinned wood, wood, waste material and the like is subjected to a crushing process (step 201) to a size that can be put into a vertical crusher described later. On the other hand, in the case of kenaf, as described above, since a large amount of plant fiber is contained in the bark of the stem, if crushing treatment is performed without cutting, long plant fiber is strong and not crushed. Vegetable fibers become long strings and remain entangled with each other without being crushed. Therefore, kenaf is put into a cutting machine capable of performing cutting and pulverization at the same time, and processing of cutting and crushing is performed (step 202). As a result, the kenaf plant fiber is cut and crushed, and the kenaf cut short to such an extent that the plant fibers are not entangled with each other is more easily pulverized as described later than the long plant fiber. Plants consisting of grasses including thinned wood, wood chips, waste wood, and kenaf after cutting and crushing are used as primary crushing materials.

  As shown in FIG. 1, there is provided a truck scale 20 which is a receiving unit for plant raw materials including grasses including primary crushed thinned wood, wood chips, waste wood, and kenaf, and is weighed after being transported by truck. Are stored in the raw material yard 22.

  The plant material 24 waiting in the raw material yard 22 is supplied to a pellet production process, which is firstly put into a quantitative supply device 28 by a heavy equipment 26 such as a shovel car, and is continuously and quantitatively transferred to a downstream process. Is discharged. At the outlet of the quantitative supply device 28, the plant material 24 that is too large to be treated is sieved and removed at the raw material screen 30.

  The primary crushed raw material that has passed through the raw material screen 30 is first supplied to a vertical crusher 32 having a classifying rotary separator, where the crushed raw material is crushed to a set size, during which foreign substances are removed and dried. Has become. For example, the crushing and drying treatment is performed so that the crushed particle size is 6 mm or less and the water content is 12% or less. The specific configuration of the vertical crusher 32 will be described with reference to FIGS. As shown in the figure, the vertical crusher 32 has a roller mill configuration with a two-stage classifying rotary separator, which has a crusher casing (outer cylinder) 34, and has a vertical axis on a stand (not shown). A rotating pulverizing table 36 is supported, and the pulverizing table 36 is disposed at a lower part in a casing (outer cylinder) 34. The crushing table 36 is driven to rotate by an electric motor. A space surrounded by the inner surface of the casing 34 and the upper surface of the pulverizing table 36 is a pulverizing chamber 38. Two to four pulverizing rollers 40 for pressing and pulverizing the pulverized material of the pulverizing table 36 include a pulverizing table 36. It is arranged above. These crushing rollers 40 are supported on the gantry side via a link mechanism (arm), and are configured such that the pressing pressure can be adjusted by a hydraulic cylinder or a spring via the link mechanism.

  A nozzle (not shown) is formed between the outer peripheral surface of the crushing table 36 and the inner peripheral surface of the lower part of the casing 34. It is formed so as to erupt. The gas is generated by a hot air generator 41 that burns the plant material 24 in the raw material yard 22 or the produced pellets or fine powder raw materials. The generated gas is introduced via the cyclone 43 from the nozzle provided in the vertical crusher 32.

  On the other hand, a discharge port 42 for discharging a gas flow to the outside of the mill is formed in an upper portion of a casing (outer cylinder) 34 of the crusher. A two-stage classifying rotary separator 44 is disposed in the casing 34 corresponding to the discharge port 42. The separator 44 rotates coaxially with the pulverizing table 36 around its axis. An inverted (reverse) frusto-conical cone 46 is provided below the separator 44. A plurality of guide vanes 48 are provided at equal intervals in the circumferential direction between the upper edge of the cone (inverted truncated cone) 46 and the ceiling surface of the casing 34. The guide vanes 48 are attached along the direction of the swirling flow in the nozzle portion. The guide vane 48 has a coarse-grain capturing pocket (capture pocket) for dropping coarse powder classified along the vertical direction into a lower inverted truncated cone 46 along the vertical wall. 50 are provided.

  Next, the material to be crushed is supplied to a substantially central portion of the crushing table 36 from a supply chute 54 (a case of a center chute is shown, but there is also a case of a side chute) through a supply pipe 52. When it is difficult to arrange the supply pipe 52, a roller cover is provided. When the crushing table 36 is rotated, the object to be crushed is pinched and crushed between the upper surface of the crushing table 36 and the crushing roller 40. The powder pulverized in this manner is blown up while rotating upward along with a gas flow spouting from below the outer periphery of the pulverizing table 36.

  The cross-sectional shape of the space formed by the inner surface of the casing 34, the outer periphery of the cone 46, and the outer periphery of the guide vane 48 is determined so as to gradually increase the speed of the rising gas flow and prevent stagnation. The mixed flow of the gas flow and the pulverized powder becomes a uniform flow, and is guided to the guide vane 48 disposed above the inside of the casing 34.

  At this time, the relatively heavy coarse powder component collides with the guide vane 48 and falls downward along the coarse particle capturing pocket 50, slides down the inner surface of the cone 46, and passes through the supply pipe 52 through the crushing table 52. Returned to 36. This is the primary classification by the guide vanes 48.

  Next, the mixed flow that has passed through the guide vanes 48 is sent to the rotary separator 44. Since the mixed stream (powder) still contains a coarse component, the rotary separator 44 secondarily classifies the powder into a coarse powder component and a fine powder component. Then, the coarse powder component is flipped off by the rotating vanes (rotating blades) 56 of the separator 44, falls again on the crushing table 36 through the cone 46 and is crushed, and the fine powder component passes through the discharge port 42. It is discharged outside and supplied to the next pellet forming step.

A dust collector 58 for separating the powder from the mixed flow of the pulverized powder and the gas is provided in a path leading to the discharge port 42 of the vertical pulverizer 32, wherein the gas and the pulverized powder are separated. ing. Then, the pulverized powder separated from the dust collector 58 is pneumatically transported by a blower. The pulverized powder is separated by a storage hopper 60 with a dust collector placed at the end of this transport path, and then the pellets are separated. The final pulverized powder is introduced into the molding machine 62. In this figure, pneumatic transportation is used, but a mechanical transportation machine may be used in some cases. In the pellet forming machine 62, steam or water is introduced as a conditioner, and the pellets are formed and solidified by the action of lignin of the plant material while heating. As the pellet molding machine 62, a pellet molding machine capable of manufacturing a cylindrical bar having a diameter of 6 to 12 mm and a length of about 20 mm is used. The formed pellets are supplied to a cooler 64 where they are cooled to near normal temperature and stored in a storage hopper 66 until they are shipped.
In addition, when the raw material contains a lot of vegetable fibers such as kenaf, the vertical pulverizer 32 performs a cutting / crushing process by a cutting function accompanying the pulverization.

  FIG. 4 shows a flowchart of a process of a manufacturing method using the plant pellet manufacturing apparatus thus configured. Plant materials 24 such as thinned wood, wood chips, waste wood, and grasses including kenaf are firstly cut or crushed to a size that can be put into a vertical crusher (step 100) and transported by truck (step 102). . The truck is carried into the plant pellet manufacturing device and weighed by the truck scale 20 (Step 104). The truck unloads the raw material yard 22 (step 106) and returns to the operation of transporting the next plant material 24. The plant material 24 in the raw material yard 22 is charged into the quantitative supply device 28 by the raw material charging machine 26 (step 108).

  The plant material 24 put in the fixed quantity supply device 28 is sieved by the raw material screen 30 (step 110), large lump and sieving waste are removed (step 112), and a part of the plant material 24 in the raw material yard 22 is removed. It is also used as fuel for a hot air generator for a dryer described later. The sieved plant material 24 is transferred to a transporter (step 114) and supplied to a vertical crusher 32 with a classifying rotary separator, where the plant material 24 is dried / crushed (step 116). ).

  In the vertical crusher 32, the plant material 24 is supplied to the center of the rotating crushing table 36, and is crushed by crushing rollers 40 for crushing. The pulverized plant material 24 is blown up by gas ejected from below the outer periphery of the pulverizing table 36, and the mixed flow of the pulverized powder and the gas is reduced by the guide vanes 48 and the rotating vanes 56 to relatively heavy coarse powder components. To the grinding table 36 through the supply pipe 52. This operation is repeated until the crushed chips have a particle size of 6 mm or less. During this time, in the hot-air generator 41, the raw material waste that has been sieved and removed from the part of the raw material is temporarily stored in a hopper (step 118), discharged by a cutting feeder (step 120), and supplied to the hot-air generator 41 (step 120). Step 122), the generated gas is supplied so as to be ejected from around the grinding table 36. Thereby, the ground plant material is brought into contact with a gas until a desired particle size is reached, and dried until the water content is reduced to a water content required for pellet production, generally about 12% or less. It is discharged outside. In order to finely adjust the water content, a watering facility for conditioning is provided in the mill or on the input plant chip transporter.

  The pulverized material discharged accompanying the gas is collected by the dust collector 58 (step 124), and the gas is discharged to the atmosphere through the exhaust fan (step 126). Further, the pulverized material is conveyed to the storage hopper 60 (Step 128), and is sent out to the pellet forming machine 62 by the cutting feeder attached thereto (Step 130) (Step 132).

  A conditioner such as steam or water is introduced into the pellet forming machine 62 (step 134), and the pulverized material put into a predetermined mold is solidified by the action of heating and lignin, and has a diameter of about 6 to 12 mm and a length of about 6 to 12 mm. Then, a pellet of about 20 mm is formed. The formed pellets are cooled to near normal temperature by the cooler 64 (step 136), sieved by the screen 65 (step 138), and stored in the storage hopper 66 (step 140).

  The pellets stored in the storage hopper 66 are finally packed in a bag, weighed (step 142), transferred (144), and temporarily stored in a storage area (step 146). It is shipped accordingly (step 148).

  FIG. 5 shows the steps of manufacturing the plant-mixed fuel used for the fuel according to the second embodiment in order. First, a case in which plant materials such as thinned wood, wood chips, and waste materials are used as primary crushing materials will be described. As shown in the figure, a raw material tank 70 is provided, which is a receiving section for a plant mixed raw material obtained by adding a paper raw material to a plant raw material such as primary crushed thinned wood, wood chips and waste wood. In addition, as the paper raw materials to be mixed, for example, used paper and recycled paper can be used. In addition, for example, bamboo chips or sugar cane may be used as the plant material. Raw materials that are too large to be treated are subjected to secondary pulverization by the mixing / pulverizer 72 according to the shape of the plant mixed raw material. Next, the plant mixed raw material is sprinkled with a sprinkler 74 to adjust the water content, and then sent to a plant mixed raw material tank 76 for storage.

  Next, the plant-mixed raw material supply device 78 supplies the plant-mixed raw material to the vertical crusher 32. The vertical mill 32 crushes the plant raw material by the same operation as described above. Here, the relatively heavy coarse powder component falls downward like the metal and the foreign matter, but is separated from the metal and the foreign matter and returned to the plant-mixed raw material tank 76 by the bucket elevator 80. The pulverized material pulverized in the vertical pulverizer 32 is sent to a preliminary dust collector 82 connected to the outlet of the vertical pulverizer 32 together with the gas, and passed through a sieve 84 such as a vibrating screen. In the sieve 84, large coarse powder components that are not suitable for the crushing components are sent to the bucket elevator 80 and stored in the above-described plant-mixed raw material tank 76 in the same manner as the above-described coarse powder components separated from the vertical crusher 32. .

  On the other hand, the pulverized components are stored as products in the pulverized product tank 86. The preliminary dust collector 82 is connected to the dust collector 58, where the gas and the finely divided components are separated. The separated fine powder component is stored in the crushed product tank 86. The pulverized product composed of the pulverized component and the fine powder component stored in the pulverized product tank 86 is sent from the burner feeder 88 to the burner as a plant mixed fuel and used as fuel. At this time, high-temperature air of about 100 ° C. to 200 ° C. is blown to the burner feeder 88 by a blower, in order to shorten the burning time of the pulverized product. On the other hand, for secondary use of the pulverized product stored in the pulverized product tank 86, the pulverized product can be used as wood powder for producing pellets, compost material, sawdust and the like.

  On the other hand, in the case of using kenaf which is obtained by cutting a plant fiber to a length that can be crushed into a primary crushing raw material and crushing, kenaf is used as a plant mixing raw material without mixing the paper raw material. Other steps are the same as those described above.

  As described above, according to the present embodiment, when the plant material 24 made of grass, including thinned wood, wood chips, waste wood, and kenaf, which has been primarily cut or crushed, is carried in, the foreign matter removal and the magnet sorter are specially performed. Without introducing pretreatment such as removal of iron shards, by just introducing directly into the vertical pulverizer 32 used in the embodiment, crushing, cutting and molding to a moldable size while removing foreign substances. The drying process required for is performed simultaneously.

Therefore, according to the present embodiment, equipment for pretreatment such as foreign matter removal which has been conventionally required becomes unnecessary, and the secondary / tertiary crusher or the dryer can be omitted. As a result, the equipment space for the plant for producing plant pellets for fuel can be significantly reduced, and also the cost can be reduced.
In the present embodiment, kenaf is used as the plant material and the plant-mixed plant grass, but the grass is not limited to this and can be applied to other grasses.

It is a block explanatory view showing the whole plant pellet manufacturing device concerning this embodiment. It is a longitudinal cross-sectional view of the vertical grinder provided with the two-stage classification type rotary separator used for the plant pellet manufacturing apparatus which concerns on this embodiment. It is explanatory drawing of the coarse-grain capture pocket of the cross section A in FIG. It is a flow chart which shows a process of a manufacturing method of a plant pellet concerning this embodiment. It is a flowchart of the manufacturing method of the plant mixed fuel concerning a 2nd embodiment. It is a block explanatory view showing the whole composition of the conventional plant pellet manufacturing device. 1 shows a flowchart of primary crushing of plant material.

Explanation of reference numerals

20 truck scale, 22 raw material yard, 24 plant material, 26 heavy equipment, 28 quantitative supply device, 30 raw material screen, 32 vertical grinder (Roller mill), 34 ... Crusher casing (outer cylinder), 36 ... Crushing table (rotary table), 38 ... Crushing chamber, 40 ... Roller (crushing roller), 41 ... Hot air Generator 42, discharge outlet 43, cyclone 44, two-stage classifying rotary separator 46, cone (inverted truncated cone), 48 guide vane 50 .. Pockets for capturing coarse particles (capture pockets), 52 supply pipe, 54 supply chute, 56 rotating vanes (rotating blades), 58 dust collectors, 60 storage hoppers, 62 ...... Pellet molding machine, 64 Cooler, 66 ...... storage hopper. 70 raw material tank, 72 mixing and crushing machine, 74 water sprinkler, 76 plant mixed raw material tank, 78 plant mixed raw material feeder, 80 bucket elevator, 82 ... Preliminary dust collector, 84 ... sieve, 86 ... crushed product tank, 88 ... burner feeder.

Claims (4)

The pre-crushed plant material is supplied to a pulverizing table of a vertical pulverizer with a classifying rotary separator, and the plant material is pulverized by a roller driven and rotated by rotation of the pulverizing table, discharged from the outer periphery of the pulverizing table, and pulverized. The material is dried and transported by a gas ejected from below the outer periphery of the crushing table, introduced into a classifying rotary separator disposed above the crushing table, and classified into a fine powder component and a coarse powder component. Returning to the grinding table, the fine powder component is discharged together with the gas to the outside of the crusher to separate the fine powder component from the gas, and then supplied to a pellet forming machine to continuously form pellets of a predetermined shape to produce. A method for producing a plant pellet, comprising: A pre-crushed plant raw material quantitative supply means, a rotary pulverization table arranged downstream of the quantitative supply means, a pulverizing roller rotating on the upper surface thereof, and a vertical pulverizer for jetting gas from an outer peripheral edge of the pulverization table, A classifying rotary separator that is disposed above a vertical pulverizer and classifies the pulverized material accompanying the gas into fine powder components and coarse powder components, returns the coarse powder components to the table, and discharges the gas containing the fine powder components. And a dust collector that takes out a pulverized substance of a fine powder component from the gas separated from the classification type rotary separator, and a molding machine that continuously forms pellets of a constant shape by introducing the fine powder component discharged from the dust collector. An apparatus for producing plant pellets, comprising: The premixed plant raw material is mixed with paper raw material to adjust the water content, and the plant mixed raw material is supplied to the pulverizing table of a vertical pulverizer equipped with a classifying rotary separator, and pulverized by rollers that rotate following the rotation of the pulverizing table. A method for producing a plant-mixed fuel, comprising discharging the pulverized material from the outer periphery of the pulverizing table, drying and transporting the pulverized material with a gas ejected from below the outer periphery of the pulverizing table, and producing a pulverized product separated from the gas as a fuel. The plant-mixed fuel according to claim 3, wherein the plant-mixed raw material or the raw material having fibrous material in the plant-mixed raw material is cut and pulverized by a cutting function accompanying the pulverization of the vertical pulverizer. Production method.

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