JP2006007025A - Dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drier with a simple constitution, capable of efficiently drying water-containing organic substances such as tea dregs and obtaining an easily re-utilizable dried substance. <P>SOLUTION: This drier 1 is provided with a drying means 2 for heating/drying the water-containing organic substances; a feeding means 3 for feeding the water-containing organic substances to the drying means 2; and a granulating means 4 arranged between the drying means 2 and the feeding means 3. The granulating means 4 is provided with a porous plate 41 and a cutter 42. The cutter 42 is provided so as to close a delivery port 35 of a hopper 30 of the feeding means 3 and is provided at the drying means 2 side adjacent to the porous plate 41. The water-containing organic substances conveyed into the hopper 30 are pushed out from holes of the porous plate 41 by a first screw 31 in the hopper 30, are cut by the cutter 42 and are thrown into the drying means 2 in a pellet-like shape. Since the shape of the pellet-like water-containing organic substances is made uniform, they are efficiently dried and can be dried even at a relatively low temperature. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dryer that dries organic matter containing moisture, and particularly relates to a dryer that heats and dries organic waste that has been dehydrated into a main body of a substantially cylindrical dryer.

  Organic wastes such as teacups and coffee bean cakes discharged from beverage manufacturing plants contain a lot of moisture and are easily rotted, and are difficult to incinerate as they are, so they are dried to reduce the moisture content. Let As a dryer for drying organic waste containing water such as teacups (hereinafter referred to as “water-containing organic matter”), a screw that is rotated by a driving device is provided inside a cylindrical body made of metal such as stainless steel. The thing is known (for example, patent document 1).

  The dryer disclosed in Patent Document 1 is installed so that the longitudinal direction of the main body is substantially horizontal with respect to the ground, and a hopper that supplies water-containing organic matter to the inside of the main body is connected to the upper side of one end of the main body. . Further, the dryer is provided with a heating device for heating the main body and an opening for discharging water vapor generated by heating the hydrated waste inside the main body to the outside of the main body.

  In this dryer, water-containing organic matter such as teacups temporarily stored in the hopper is supplied to the inside of the main body from the hopper by natural fall, and the water-containing organic matter supplied to the inside of the main body is From the side to the other end side. The water-containing organic matter moving inside the main body is heated and dried by being transferred while contacting the inner wall of the heated main body. According to the dryer disclosed in Patent Document 1, moisture evaporated from the water-containing organic material as the water-containing organic material is dried is discharged from an opening provided in the dryer, so that the water-containing organic material is quickly dried.

  By the way, in the dryer used for drying the water-containing organic material handled as waste, like the dryer disclosed in Patent Document 1, the water content of the water-containing organic material is efficiently reduced with a small amount of energy. It is important to reduce. For this reason, the quality of the dried product obtained by the drying process is not considered, and water-containing organic substances having various properties are used for the drying process as they are.

  For example, in the drier disclosed in Patent Document 1, the water-containing organic matter housed in the hopper is put into the main body in a lump of various sizes, so that the inside of the large lump may not be dried. Such dry matter that is insufficiently dried is suitable for incineration, but it is difficult to recycle it because of decay from the inside.

On the other hand, in order to sufficiently dry the water-containing organic matter, it is necessary to lengthen the drying process time or increase the heating temperature, which causes an increase in the amount of energy required for the drying process. In addition, if the tea bowl is dried at a high temperature, the quality of the dried tea bowl may be deteriorated and it may be difficult to reuse.
JP 9-101084 A

  The present invention has been made in view of the problems as described above, and its purpose is to simplify the structure, efficiently dry the water-containing organic matter in a homogeneous state, and suppress the amount of energy required for the drying process. It is to provide a dryer that can. Another object of the present invention is to provide a dryer capable of obtaining a dried product that can be easily recycled.

  The present invention is characterized in that the water-containing organic material supplied to the drying means from the supply means having a hopper or the like is pelletized and dried. More specifically, the present invention provides the following.

  (1) A water-containing organic matter drier comprising: a drying means for storing a water-containing organic substance containing moisture in an internal space and heating and drying; and a supply means connected to the drying means for supplying the water-containing organic substance to the internal space. And a granulating means for granulating the hydrated organic substance supplied from the supplying means to the drying means between the supplying means and the drying means.

  According to the present invention, since the granulating means is provided between the supplying means and the drying means, the water-containing organic substance can be supplied in the form of pellets to the drying means. Since the pellet-like water-containing organic substance is homogenized in shape, it is dried almost uniformly, and uneven drying is unlikely to occur, and can be efficiently dried even at a relatively low temperature. Therefore, the amount of energy required for drying can be reduced. Further, it is possible to prevent a change in quality before and after the drying treatment, and it is possible to obtain a dried product that is not easily spoiled and is suitable for use as a recycled resource. Furthermore, since the pellets have good fluidity, the water-containing organic matter can be prevented from adhering to the internal space of the drying means, and the amount of energy required for moving the water-containing organic matter in the internal space of the drying means can also be reduced.

  Here, “hydrated organic matter” refers to organic waste such as tea leaves, coffee manufacturing residue such as coffee bean cake, food residues such as okara and raw garbage, and organic sludge generated by biological treatment of waste water. . The present invention is particularly suitably used for drying a dehydrated cake obtained by pressure dehydration of a water-containing organic material, but the water-containing organic material is not limited to pressure dewatering, and may be vacuum dewatered or centrifugal dewatered.

  In order to reduce the amount of energy required for the drying treatment of the water-containing organic matter, it is preferable to dehydrate and dry the water-containing organic matter such as teacups immediately after discharge, and a dehydrator is provided upstream of the supply means, and the outlet of the dehydrator and the supply means May be directly connected to the inlet. In the present invention, the water-containing organic substance can be put into the supply means without dehydration. However, if the water-containing organic substance is not dehydrated, the amount of energy required for the drying process increases, which is not preferable.

  (2) The dryer according to (1), wherein the granulating means includes a perforated plate and a cutter that cuts the water-containing organic matter that has passed through the perforated plate.

  It is preferable that the perforated plate and the cutter are provided in a passage through which the water-containing organic substance passes by connecting the supplying means and the drying means, and adjacent to each other at an interval of about 5 to 30 mm, particularly about 10 to 20 mm. The perforated plate preferably includes a plurality of small holes having a diameter of 5 to 30 mm, particularly about 10 to 20 mm. The water-containing organic matter discharged from the supply means passes through the perforated plate and is cut with a predetermined width by a cutter. For this reason, according to this invention, the water-containing organic substance discharged from a supply means can be granulated reliably and efficiently.

  The perforated plate and the cutter can be provided inside the supply means and / or the drying means. For example, the discharge port from which the water-containing organic substance is discharged from the supply unit and the inlet of the drying unit are directly connected, a porous plate is provided so as to cover the discharge port of the supply unit, and a cutter is provided on the inlet side of the drying unit. it can. In this way, if the perforated plate and the cutter are provided so as to extend over one or both of the supply means and the drying means, and the granulating means is integrated with the supply means and / or the drying means, the complexity and large size of the dryer are increased. Can be prevented.

  In addition, the supply unit and the drying unit may be connected by a connection unit including a connection tube that is detachable from the supply unit, and at least one of the perforated plate and the cutter may be provided in the connection tube. For example, a perforated plate may be provided so as to cover the discharge port of the supply means, and the cutter may be accommodated in a connecting pipe connected to the discharge port. Alternatively, a perforated plate and a cutter may be provided inside the connecting pipe and traverse the inside of the pipe. As described above, if at least one of the perforated plate and the cutter is accommodated in the removable connecting pipe that connects the supplying means and the drying means, maintenance of the granulating means can be facilitated.

  (3) The supply means includes a hopper connected to the drying means and charged with water-containing organic matter, a first screw extending from the inlet of the hopper toward the granulating means, and rotating the first screw. The dryer according to (1) or (2), further comprising: a first drive device that transfers the water-containing organic matter charged into the hopper to the drying means.

  The water-containing organic matter stored in the hopper contains water and forms a bridge and tends to be agglomerated. According to the invention described in (3), the first screw is provided in the hopper, and the first screw is driven first. By rotating with an apparatus, even a hydrated organic substance in a lump can be quantitatively and efficiently transferred to the hopper discharge port. In addition, by providing the first screw in the hopper, it is possible to prevent the drying atmosphere in the drying means body from being affected and to continuously put the water-containing organic substance into the drying means.

  If the granulating means is provided on the tip side of the first screw located on the discharge side of the hopper, the water-containing organic matter in the hopper is quantitatively pushed out from the hopper discharge port by the movement of the first screw, and the pellet-like water-containing organic matter is removed. It can be reliably and stably put into the drying means.

  The “drying atmosphere” refers to a state adjusted for the drying process, and specifically refers to a high temperature reduced pressure state or a high temperature vacuum state. Further, the `` hopper '' is a storage tank that accepts a predetermined amount of water-containing organic matter and stores it at least temporarily, a charging port into which the water-containing organic material is charged, a discharge port from which the water-containing organic material in the hopper is discharged, Is provided. The shape of the hopper is not limited, and may be an open type container or a closed type container. Examples of the open container include a funnel-shaped container, and examples of the sealed container include a tank having an input port and a discharge port. In order to prevent the water-containing organic matter from being spoiled, it is preferable that the hopper is constituted by a sealed container such as a tank and the tank is filled with carbon dioxide gas, nitrogen gas or the like to be in an oxygen-poor condition.

  (4) The dryer according to (3), further comprising a first controller that controls a rotation speed of the first screw of the supply unit according to a drying process state of the water-containing organic matter in the drying unit. .

  When the first screw is provided in the supply means, the supply speed and pellets of the water-containing organic substance supplied to the drying means are controlled by controlling the first drive device for rotating the first screw to control the rotation speed of the first screw. Can be adjusted. For this reason, according to the property etc. of a water-containing organic substance, a drying process condition can be changed easily and a water-containing organic substance can be dried efficiently and reliably.

  (5) The drying means includes a substantially cylindrical main body having the internal space, a second screw provided in the internal space of the main body and extending along a longitudinal direction of the main body, and rotating the second screw. The drying means according to any one of (1) to (4), further comprising: a second driving device that transfers the water-containing organic substance supplied to the drying means from the inlet side to the outlet side.

  It is preferable that the water-containing organic substance put into the drying means is heated and dried while being stirred and transferred by the second screw. The heat drying mainly includes conductive heat transfer drying that heats and dries the water-containing organic matter in contact with the inner wall surface of the main body by heating the inner wall surface of the main body, and it is preferable to use other drying methods in combination. Other drying methods include convection heat transfer drying (or hot-air drying) that sends air that has been dehumidified to the internal space of the main body to dry, and reduced-pressure drying (including vacuum drying) that reduces the internal pressure of the main body. Etc.

  In addition, in order to dry a water-containing organic substance by a conductive heat transfer method, the dryer is provided with a heating means for heating the main body. Examples of the heating means include a heating wire that covers and heats the main body. Moreover, in order to improve heat utilization efficiency, it is preferable that the main body has a double tube structure made of metal such as stainless steel, and heating means for supplying a heat source such as warm water or warm air is provided between the double tubes.

  (6) The drying means further includes a substantially cylindrical outlet pipe connected to an outlet from which a dried product obtained by drying the water-containing organic matter by the drying means is taken out, and a rotary valve provided in the outlet pipe. The dryer according to any one of (1) to (5), wherein the dryer is provided.

  According to the present invention, by providing a rotary valve on the outlet pipe, it is possible to prevent the drying atmosphere inside the drying means body from being affected and to continuously take out the dried product. Here, the “dried product” is a product obtained by drying a water-containing organic material to have a water content of 15% by weight or less, preferably 10% by weight or less.

  It is preferable to connect the dry matter storage tank comprised with the container which can be sealed to the front-end | tip of an exit pipe. Furthermore, it is preferable to connect a suction device such as a suction pump for sucking air in the tank and a gas supply means for blowing an inert gas such as nitrogen gas into the tank. With such a configuration, the dried product can be vacuum transported from the inside of the drying means main body to the dried product storage tank, and the dried product storage tank can be filled with an inert gas.

  (7) The dryer according to (5) or (6), wherein the drying unit further includes a screw heating unit that heats the shaft of the second screw.

  According to the present invention, by heating at least the shaft of the second screw, it is possible to quickly dry the water-containing organic matter transferred through the dryer body while being in contact with the second screw. As a specific configuration for heating the shaft of the second screw, the shaft of the second screw is configured by a metal cylinder or the like, and a rotary joint for blowing heated hot water or steam is connected to one end of the cylinder. A configuration is mentioned. In this case, the other end of the cylinder is provided with a discharge port that passes through the cylinder and discharges hot water or steam.

  (8) The drying means further includes a partition plate extending in a direction orthogonal to the axial direction of the second screw in the internal space of the main body, according to any one of (5) to (7). Dryer.

  In the present invention, by providing a partition plate in the internal space of the drying means, a part of the water-containing organic material transported in the longitudinal direction can be dammed to prevent a short path of the water-containing organic material, and the internal space can be used effectively.

  Regarding the size and shape of the partition plate, a gap through which the water-containing organic matter passes is formed between the partition plate and the wall surface of the internal space. For example, the partition plate can be constituted by a substantially U-shaped plate in plan view in which one end portion of the disk is cut out and a groove is formed. The substantially U-shaped partition plate can be installed simply by inserting the shaft of the second screw into the groove even after the second screw is provided inside the main body, and the water-containing organic matter passes between the grooves. Since the hole which can be formed is formed, a residue can be discharged | emitted at the time of equipment cleaning etc., and a maintenance becomes easy, and it is preferable.

  (9) The method according to any one of (5) to (8), further comprising a second control device that controls a rotation speed of the second screw of the drying unit in accordance with a drying treatment state of the water-containing organic matter in the drying unit. A dryer according to any one of the above.

  According to the present invention, by controlling the second drive device that rotates the second screw, the rotation speed of the second screw that stirs the inside of the drying means is controlled. For this reason, the residence time in a drying means can be easily adjusted according to the property of a water-containing organic substance, and a water-containing organic substance can be dried efficiently and reliably.

  (10) Connection means for connecting the supply means and the drying means, blower means for supplying drying air to the internal space of the drying means, suction means for sucking air in the internal space of the drying means, The blowing means includes a blowing pipe connected to the drying means, the suction means includes a suction pipe connected to the drying means, and the blowing pipe and the suction pipe can be opened and closed. The dryer according to any one of (1) to (9), wherein the dryer is configured.

  In the dryer according to the present invention, the hot air drying can be performed by exhausting from the suction pipe while supplying the drying air from the blow pipe, and the air in the internal space of the main body is removed from the suction pipe by closing the blow pipe. Vacuum drying can also be performed by suction. That is, by connecting the air blowing means having a tube configured to be openable and closable to the main body and the suction means, two drying methods of hot air drying and reduced pressure drying are appropriately selected according to the type of the water-containing organic matter to be dried. Can be used.

  “Drying air” refers to air having a humidity of about 50% or less. The temperature of the drying air is not limited, but it is preferable to use hot air of 80 to 140 ° C. in order to shorten the time required for the drying process. A dehumidifying process such as cooling the air discharged from the drying means main body may be performed and circulated to the drying means as drying air.

  (11) The connection means includes a substantially cylindrical connection pipe connected to the supply means and the drying means, and the blower pipe of the blower means is connected to a wall surface of the connection pipe, and the granulating means The dryer according to (10), wherein the cutter is accommodated in a position inside the connecting pipe and closer to the supply means than the connecting pipe.

  According to the present invention, after passing through the perforated plate, drying is promoted by applying air to the water-containing organic material that has been cut into a pellet by a cutter, and the particles of the water-containing organic material in the form of pellets adhere to each other. And the water-containing organic matter can be dried more quickly.

  (12) The dryer according to any one of (1) to (11), wherein two or more of the drying means are connected in series.

  According to the present invention, by providing two or more drying means connected in series, drying conditions in each drying means can be set as appropriate, and the water-containing organic matter can be dried efficiently and reliably. Further, if the dryers are arranged so as to be stacked in the vertical direction, an increase in the installation area of the drying means can be prevented.

  The second screw of each drying means provided in multiple stages may be different in shape such as size, and the rotational speed is preferably configured to be individually adjustable with the second screw of each drying means.

  ADVANTAGE OF THE INVENTION According to this invention, the dryer which can perform a uniform drying process efficiently with a simple structure can be provided. For this reason, according to the dryer of the present invention, it is possible to sufficiently dry the water-containing organic material that has been conventionally incinerated as waste, thereby obtaining a dried material suitable for reuse.

  Hereinafter, the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic diagram of a dryer 1 according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a cross-sectional configuration of the dryer 1. FIG. 3 shows the structure of the granulating means, and FIG. 4 shows the internal structure of the dryer 1. In the following description, the same members are denoted by the same reference numerals, and description thereof is omitted or simplified. Further, terms indicating directions such as up, down, left, and right are based on a state in which the dryer 1 is fixed to a floor surface or the like, and are used for convenience of explanation.

  As shown in FIG. 1, the dryer 1 includes a drying unit 2, a supply unit 3, a connection unit 5 that connects the drying unit 2 and the supply unit 3, a granulating unit 4, a blowing unit 6, and a suction unit. Means 7, assembly means 8 for connecting the first drying means 2a and the second drying means 2b, and a controller C that also serves as the first control device and the second control device are provided. The drying means 2 includes first drying means 2a and second drying means 2b, which are two drying means having the same configuration, and the air blowing means 6 includes first air blowing means 6a and second air blowing means 6b having the same structure, and suction. The means 7 includes a first suction means 7a and a second suction means 7b having the same configuration.

  The supply means 3 includes a hopper 30, a first screw 31 provided inside the hopper 30, and a first motor 32 as a first drive device. The hopper 30 includes an input port 34 into which a water-containing organic material is input and a discharge port 35 through which the water-containing organic material is discharged, and is configured as a sealable tank. The first screw 31 has a configuration in which blades are spirally wound around a shaft that is rotated by a first motor 32, and is positioned substantially at the center in the hopper 30, and extends from the input port 34 side to the discharge port 35 side.

  The connecting means 5 includes a cylindrical connecting pipe 51 and connects the supplying means 3 and the drying means 2. Specifically, one end of the connection pipe 51 is connected to the discharge port 35 of the hopper 30, and the other end is connected to the first drying means 2a. The water-containing organic matter enters the drying means 2 through a tubular portion constituted by the discharge port 35 of the supply means 3, the connection pipe 51 of the connection means 5 and the inlet 14 of the drying means 2 described later.

  The granulating means 4 includes a disk-shaped perforated plate 41 having a plurality of small holes, and a rotary cutter 42 that cuts the thread-like water-containing organic matter that has passed through the perforated plate 41. As shown in FIG. 3, the perforated plate 41 is fitted into the discharge port 35 of the hopper 30 and arranged so as to cross the passage of the water-containing organic matter discharged from the hopper 30. The cutter 42 is arranged on the first drying means 2 a side adjacent to the perforated plate 41 and is accommodated in the connecting pipe 51. In addition, without providing the connecting pipe 51, the discharge port 35 of the supply unit 3 and the inlet 14 of the drying unit 2 are directly connected, the porous plate 41 is provided in the discharge port 35, and the cutter 42 is accommodated in the inlet 14. You may comprise.

  The 1st drying means 2a and the 2nd drying means 2b are the same structures, respectively, The main body 21, the 2nd screw 22, the 2nd motor 27 as a 2nd drive device, the screw heating means 25, And a partition plate 26. The main body 21 has a substantially cylindrical shape in which both ends are closed and an internal space 20 is formed. A pair of parallel cylinders extending in a direction orthogonal to the axis of the main body 21 are connected to both ends. Of the pair of cylinders, one end of one of the cylinders is an open inlet 14 and the other end is a first leg portion 13a. Both ends of the other cylinder are opened to form second leg portions 13b that also serve as the exhaust port 18 and the outlet. The drying means 2 is installed with the first legs 13a and 13b (collectively referred to as “legs 13”) as the lower side.

  Thus, the main body 21 has a substantially symmetrical outer shape in the vertical and horizontal directions. 2, the wall surface of the main body 21 facing the exhaust port 18 and the second leg portion 13b is opened, and the exhaust port 18 and the second leg portion 13b communicate with the internal space 20 of the main body 21. . For this reason, the dried product is taken out from the internal space 20 with the second leg portion 13b as an outlet, and the second leg portion 13b of the first drying means 2a is connected to the inlet 14 of the second drying means 2b. Two or more drying means 2 can be easily connected in series.

  The first drying means 2a and the second drying means 2b are connected via the assembly means 8. The assembly means 8 includes a first assembly tube 80a and a second assembly tube 80b (hereinafter collectively referred to as “assembly tube 80”) and a crushing device 82 provided in the first assembly tube 80a. The first assembly pipe 80a connects the second leg 13b of the first drying means 2a and the inlet 14 of the second drying means 2b, and the second assembly pipe 80b is the first leg 13a of the first drying means 2a. Are connected to the exhaust port 18 of the second drying means 2b. As a result, the water-containing organic substance charged into the inlet 14 of the first drying means 2a enters the inlet 14 of the second drying means 2b from the second leg 13b of the first drying means 2a through the first assembly pipe 80a, and 2 It is discharged from the second leg 13b of the drying means 2b.

  One end of a tubular outlet pipe 15 is connected to the second leg portion 13b of the second drying means 2b. The other end side of the outlet pipe 15 is connected to a dry matter storage tank 150 formed of a sealable container. The dry matter storage tank 150 includes a suction device such as a suction pump, a bag filter provided so as to close the inlet, and a gas supply pipe (none of which is shown) provided in the lower part of the storage tank to blow nitrogen gas into the tank. The dried product is vacuum-transported from the internal space 20 to the dried product storage tank 150 and stored under anoxic conditions. Further, a rotary valve 152 is provided between the outlet pipe 15 and the dry matter storage tank 150, and the dry matter can be taken out from the internal space 20 while maintaining the drying atmosphere of the internal space 20 of the drying means 2.

  The blower 6 includes a fan 60, a blower pipe 61, and an openable / closable valve 62 provided in the middle of the blower pipe 61. The blower pipe 61 of the first blower means 6 a is connected to the wall surface of the connection pipe 51, and supplies the drying air sent from the fan 60 to the first drying means 2 a via the connection pipe 51. On the other hand, the blower pipe 61 of the second blower means 6b is connected to the wall surface of the first assembly pipe 80a, and supplies the drying air to the second drying means 2b via the first assembly pipe 80a.

The suction means 7 is a suction pump 70 as a suction device that sucks air in the internal space 20 of the drying means 2, a suction pipe 71 connected to the suction pump 70, and an openable / closable provided in the middle of the suction pipe 71. And a valve 72. Further, a thermometer T ₂ and a hygrometer H are provided in the middle of the suction pipe 71, and by measuring the temperature and humidity of the gas sucked from the outlet (second leg portion 13b) side of the internal space 20, It is possible to grasp the dry treatment state of water-containing organic matter.

  The blowing means 6 and the suction means 7 are connected by a circulation pipe 67 so that the gas sucked from the internal space 20 can be circulated and used. A dehumidifying device 68 composed of a condenser or the like is provided in the middle of the suction pipe 71, and the high-temperature and high-humidity air inside the drying means 2 is cooled to be dehumidified and sent to the blower pipe 61 as drying air. In order to accelerate the drying of the water-containing organic matter, a heat exchanger or the like may be provided in the middle of the circulation pipe 67 to send the drying air to the blower pipe 61 as hot air heated.

  Since the exhaust gas discharged from the suction pipe 71 of the first suction means 7a has high humidity, only the exhaust gas discharged from the suction pipe 71 of the second suction means 7b may be circulated and used. In this case, the circulation pipe 67 may be connected to both the first air blowing means 6a and the second air blowing means 6b. Thus, by circulating and using the exhaust gas discharged from the drying means 2, the generation of exhaust gas can be suppressed, and the amount of energy necessary for heating the gas can be reduced.

  Next, the structure of the drying means 2 will be described in detail with reference to FIG. The main body 21 includes a cylindrical cylindrical wall 10 and a pair of parallel disk-shaped side walls 11a and 11b that close both ends of the cylindrical wall 10 (collectively referred to as “side wall 11”). A shaped internal space 20 is formed. In this embodiment, the main body 21 has a double tube structure composed of an inner tube and an outer tube made of metal such as stainless steel, and a space (heating space) provided between the inner tube and the outer tube. Heating means (not shown) is provided for heating the inner tube by supplying hot water or steam to the tube. The heating means includes a heat supply pipe that is connected to the wall surface on the inlet 14 side and supplies hot water to the heating space, and a heat discharge pipe that is connected to the wall surface on the second leg portion 13b side and discharges hot water and the like from the heating space. I have.

  Two more openings 16 are provided on the upper wall surface of the cylindrical wall 10 between the inlet 14 and the exhaust port 18. The opening 16 has a cylindrical shape protruding from the wall surface of the cylindrical wall 10 and is configured to be openable and closable by covering the tip surface with a disc-shaped lid.

  As shown in FIGS. 2 and 4, the internal space 20 of the main body 21 is provided with a second screw 22 configured by spirally winding a blade around a shaft. The blades of the screw 22 are preferably composed of a perforated plate having a plurality of small holes, etc., transporting the water-containing organic substance while stirring and mixing, and having a structure in which moist air generated by heating and drying easily flows. . The second screw 22 is disposed inside the main body 21 from the flange portions on both end sides of the main body 21, extends in parallel with the longitudinal direction of the main body 21, and both end portions protrude to the outside of the main body 21. The axis | shaft of the 2nd screw 22 is comprised with metal pipe | tubes, such as stainless steel.

  A second motor 27 that rotates the shaft of the second screw 22 is connected to one end of the shaft of the second screw 22 that protrudes outside the main body 21, and a screw heating means 25 is connected to the other end. The screw heating means 25 can be configured by a heat source supply device such as a liquid feed pump that sends a heat source such as hot water or steam into the shaft of the second screw 22. By heating the shaft of the second screw 22, the blades spirally provided on the shaft are also heated, and the drying of the water-containing organic matter transferred in contact with the second screw 22 can be promoted.

  In addition, two partition plates 26 a and 26 b (hereinafter collectively referred to as “partition plate 26”) are provided in the internal space 20 so as to extend upward. As shown in FIG. 4, the partition plate 26 has a substantially U-shape in plan view, with a part of the disc cut out and a groove 260 formed therein. The partition plate 26 is disposed with the groove 260 inserted into the shaft of the second screw 22, a gap 220 is formed in the upper part of the partition plate 26, and a passage hole is formed in the groove 260.

The body 21, out of two partition plate 26, and a thermometer T ₁ is provided adjacent to the partition plate 26b provided on the side closer to the second leg portion 13b, measures the temperature of the interior space 20 By doing, it is comprised so that the drying process state of a water-containing organic substance can be grasped | ascertained.

A thermometer T ₂ provided in the suction pipe 71, a hygrometer H and a thermometer T ₁ provided in the main body 21 are connected to the controller C. The controller C is also connected to the first motor 32 and the second motor 27. The controller C includes a central processing unit (CPU) and the like, and inputs measurement values transmitted from the thermometers T ₁ and T ₂ (collectively referred to as “thermometer T”) and the hygrometer H, and measures them. Based on the value, the drying treatment state of the water-containing organic matter is determined, and a signal for controlling the output of either one or both of the first motor 32 and the second motor 27 is output, and the first screw 31 and the second screw 22 Control one or both rotational speeds.

  Next, a method for drying water-containing organic substances such as teacups and coffee bean cakes discharged from a beverage manufacturing factory using the dryer 1 described above will be described.

  Water-containing organic substances such as teacups generated in the manufacturing process of tea beverages and the like are mechanically dehydrated by a dehydrator (not shown), and are put into the hopper 30 as a massive water-containing organic substance (dehydrated cake). The outlet of the dehydrator and the inlet 34 of the hopper 30 are connected by a conveying means such as a conveyor (not shown) so that the dehydrated cake is immediately carried into the hopper 30 when discharged from the dehydrator. .

  The massive water-containing organic substance thrown into the hopper 30 is sent to the discharge port 35 side when the first screw 31 is rotated. The water-containing organic substance sent to the discharge port 35 is pushed out from the small hole of the perforated plate 41 by the first screw 31 and cut by the cutter 42 at intervals of 5 to 30 mm, preferably 10 to 20 mm. The diameter of the small holes of the porous plate 41 is preferably 5 to 30 mm, particularly 10 to 20 mm, and the water-containing organic matter cut by the cutter 42 through the porous plate 41 has a diameter of 5 to 30 mm, preferably 10 to 10 mm. It becomes a cylindrical pellet of about 20 mm.

  The water-containing organic material adjusted to the pellet shape falls naturally and is put into the internal space 20 of the first drying means 2a. The internal space 20 is provided with a second screw 22 that is rotated by being driven by the second motor 27, and the water-containing organic matter is carried by the second screw 22 while being stirred from the inlet 14 side to the outlet 15 side. A partition plate 26 is provided in the internal space 20, and the hydrated organic matter is blocked by the partition plate 26, thereby preventing a short path and effectively using the internal space 20.

  In the drying means 2, the main body 21 is moved while sucking air in the internal space 20 while hot air drying is performed to blow dry air such as hot air to dry the water-containing organic matter according to the type of water-containing organic matter generated from a beverage manufacturing factory or the like. Dry under reduced pressure by heating to dry the water-containing organic matter.

  Specifically, the drying under reduced pressure is suitable for a drying process at a relatively low temperature of about 40 to 60 ° C., and the reduced pressure drying can prevent the decomposition of catechins contained in the tea bowl. When discharged, it is preferable to perform drying under reduced pressure. When drying under reduced pressure, the main body 21 is heated, and the water-containing organic matter in the main body 21 is heated, and the hydrated organic matter in the internal space 20 is sucked and discharged from the suction pump 70 to dry the water-containing organic matter. Let The main body 21 may be decompressed using a water ejector instead of the suction pump 70.

  On the other hand, since it is preferable to dry the coffee bean cake while blowing air, it is preferable to dry it with hot air. In the dryer 1 according to the present embodiment, drying air is blown from the inlet 14 side of the drying means 2 and exhausted from the second leg portion 13b side serving as an outlet along the flow of the water-containing organic matter. Even when the water-containing organic substance is used, the temperature of the hot air gradually decreases as the drying of the water-containing organic substance proceeds.

  Further, in the present embodiment, when performing hot air drying, drying air blown from the fan 60 is blown from the blower pipe 61 downstream of the cutter 42, and air containing the above evaporated from the water-containing organic matter is discharged from the suction pipe 71. And let it dry. The blower pipe 61 may be connected to the main body 21 of the drying means 2. However, by providing the blower pipe 61 adjacent to the cutter 42 as in the present embodiment, it promotes the drying of the water-containing organic material in the form of pellets. Recombination of pellets can be prevented.

  Thus, the water-containing organic substance thrown into the 1st drying means 2a is dried as it is carried to the 2nd leg part 13b side used as an exit. The first drying means 2a is connected to the second drying means 2b. In the first drying means 2a, the water-containing organic matter carried to the second leg portion 13b side passes through the first assembly pipe 80a from the second leg portion 13b. Naturally falls and enters the second drying means 2b. A rotary crushing device 82 having a plurality of blades is provided in the first assembly tube 80a, and the water-containing organic matter sent from the first drying means 2a to the second drying means 2b is crushed and made into powder. Is done.

  The first assembly pipe 80b is connected to the air blowing pipe 61 of the second air blowing means 6b at a position closer to the second drying means 2b than the crushing device 82. When performing hot air drying, the air is dried to the crushed water-containing organic matter. Air is sprayed and drying is promoted.

  The water-containing organic substance thrown into the second drying means 2b is dried while being transferred from the inlet 14 to the second leg portion 13b which is the outlet through the main body 21. In the second drying means 2b, the outlet pipe 15 is connected to the second leg portion 13b, and the rotary valve 152 of the outlet pipe 15 is opened, whereby the dried product is discharged out of the main body 21.

  A dry matter storage tank 150 provided with a suction pump is provided at the tip of the outlet pipe 15 through the rotary valve 152, and the dry matter is sucked from the internal space 20 of the second drying means 2b by the suction pump and removed by the bag filter. Then, it is stored in the dry matter storage tank 150. Nitrogen gas is supplied from the bottom of the dry matter storage tank 150 to prevent oxidation of the dry matter in the tank. Note that the dry matter storage tank 150 may be provided with a sensor for detecting an internal interface position, and output the dry matter discharge timing based on the interface position detected by the sensor.

  Further, the dryer 1 is configured by connecting two drying means 2 in series, and the pair of legs 13 of the second drying means 2b are fixed to the floor surface. One or more drying means 2 may be further connected downstream of the second drying means 2b using a connection structure with the second drying means 2b. When a plurality of drying means are connected in series, the shape, rotation speed, heating temperature, and the like of the second screw provided in the internal space of each drying means may be appropriately changed.

  The supply speed of the water-containing organic substance from the supply means 3 to the drying means 2 and / or the movement speed of the water-containing organic substance in the drying means 2 is to adjust the rotation speed of the first screw 31 and / or the second screw 22. Therefore, it may be changed as appropriate. Specifically, when it is determined from the temperature and humidity in the drying means 2 measured by the thermometer T and / or the hygrometer H that the water-containing organic matter is not sufficiently dried, the controller C A signal for lowering the rotational speed of the first screw 31 and / or the second screw 22 is output. Thereby, the drying process time per unit water-containing organic substance amount can be lengthened, and sufficient drying can be performed. Moreover, when the drying process is progressing rapidly, the rotational speed of the 1st screw 31 or / and the 2nd screw 22 can be raised, and the processing amount of the water-containing organic substance per unit time can be increased.

  INDUSTRIAL APPLICABILITY The present invention can be used to recycle organic wastes such as teacups that are generated when tea beverages are produced.

It is a figure which shows the dryer which concerns on one Embodiment of this invention. It is a figure which shows the cross-sectional structure of the dryer which concerns on the said embodiment. It is a figure which shows the structure of the granulation means of the dryer which concerns on the said embodiment. It is a figure which shows the internal structure of the drying means of the dryer which concerns on the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dryer 2 Drying means 3 Supply means 4 Granulating means 5 Connection means 6 Blowing means 7 Suction means 8 Assembly means 21 Main body 22 2nd screw 25 Screw heating means 26 Partition plate 27 2nd motor (2nd drive device)
30 hopper 31 first screw 32 first motor (first driving device)
41 perforated plate 42 cutter 51 connecting pipe 61 blower pipe 71 suction pipe C controller (first control device and second control device)

Claims (12)

A water-containing organic matter drier comprising: drying means for containing a water-containing organic substance containing moisture in an internal space and heating and drying; and supply means connected to the drying means for supplying the water-containing organic substance to the internal space,
A dryer characterized in that a granulating means for granulating a water-containing organic substance supplied from the supplying means to the drying means is provided between the supplying means and the drying means.   The dryer according to claim 1, wherein the granulating means includes a perforated plate and a cutter that cuts the water-containing organic matter that has passed through the perforated plate.   The supply means includes a hopper connected to the drying means and charged with water-containing organic matter, a first screw extending from the inlet of the hopper toward the granulating means, and rotating the first screw to the hopper. The dryer according to claim 1, further comprising: a first driving device that transfers the hydrated organic substance that has been input to the drying unit.   The dryer according to claim 3, further comprising a first control device that controls a rotation speed of the first screw of the supply unit in accordance with a drying treatment state of the water-containing organic matter in the drying unit.   The drying means includes a substantially cylindrical main body having the internal space, a second screw provided in the internal space of the main body and extending along the longitudinal direction of the main body, and rotating the second screw to the drying means. The drying means according to any one of claims 1 to 4, further comprising: a second driving device that transfers the supplied water-containing organic substance from the inlet side to the outlet side.   The drying means further includes a substantially cylindrical outlet pipe connected to an outlet from which a dried product obtained by drying the water-containing organic matter by the drying means is taken out, and a rotary valve provided in the outlet pipe. The dryer according to any one of claims 1 to 5, characterized in that:   The dryer according to claim 5 or 6, wherein the drying unit further includes a screw heating unit that heats the shaft of the second screw.   The dryer according to any one of claims 5 to 7, wherein the drying unit further includes a partition plate extending in a direction orthogonal to the axial direction of the second screw in the internal space of the main body.   9. The apparatus according to claim 5, further comprising a second control device that controls a rotation speed of the second screw of the drying unit in accordance with a drying treatment state of the water-containing organic substance in the drying unit. Dryer. Connection means for connecting the supply means and the drying means;
A blowing means for supplying drying air to the internal space of the drying means;
Suction means for sucking air in the internal space of the drying means,
The blower means includes a blower pipe connected to the drying means,
The suction means includes a suction pipe connected to the drying means,
The dryer according to any one of claims 1 to 9, wherein the blower pipe and the suction pipe are configured to be openable and closable. The connection means includes a substantially cylindrical connection pipe connected to the supply means and the drying means,
The blowing pipe of the blowing means is connected to the wall surface of the connecting pipe,
11. The dryer according to claim 10, wherein the cutter of the granulating unit is accommodated in a position inside the connecting pipe and closer to the supplying unit than the connecting pipe.   The dryer according to any one of claims 1 to 11, wherein two or more drying means are connected in series.

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