JP4413271B1 - Floating diffusion dryer - Google Patents

Abstract

【Task】
Provided is a floating diffusion drying method that has high microwave irradiation efficiency on a workpiece and can uniformly dry the workpiece in a short time without unevenness.
A cylindrical processing container (1) arranged in a horizontal direction, a horizontal rotating shaft (15) provided in the processing container (1) so as to be rotationally driven, and the horizontal rotating shaft ( A drying apparatus is comprised from the several flat blade | wing (18 ', 18 ") attached to 15), and the microwave transmitter (40) which irradiates a microwave in a processing container (1). The object is put into the processing container (1). The flat blades (18 ', 18 ") are driven at a predetermined peripheral speed to scoop up the object to be processed by a predetermined angle, dropped to float and diffuse, Irradiate from above the processing container (1).
[Selection] Figure 1

Description

  The present invention relates to a cylindrical processing container disposed in a horizontal direction, a horizontal rotating shaft provided rotatably in the processing container, and a plurality of flat blades attached to the horizontal rotating shaft. And a floating diffusion type drying apparatus comprising a microwave transmitter for irradiating microwaves into the processing container.

  Foods, pharmaceuticals, feeds, new materials, etc. may be directly dried as hydrous powder, or may be dried prior to granulation. Furthermore, it may be dried after being granulated. The powder may be granulated with a solvent other than water and dried. For example, pellets such as polypropylene that are distributed as resin materials are kneaded by adding solvent chloroform to the material polypropylene, and dried so that the chloroform concentration is below a predetermined concentration when formed into pellets. The Heat drying, vacuum freeze drying, ultrasonic drying, microwave drying, and the like are applied to such a drying process. Patent Document 1 discloses a drying method using a microwave.

JP 2004-137373 A Japanese Patent No. 2955721 JP 2001-33158 A

  In the above-mentioned Patent Document 1, solid matter is obtained through a crushing process for crushing combustible waste, a water washing process for washing with the purpose of removing salt, a preliminary drying process for drying in advance, a non-combustible material selection, a compression molding process, and the like. A solid fueling method is described in which a solid fuel is obtained from combustible waste by molding and final drying by microwaves.

  There is also practiced a microwave drying method in which an object to be processed is placed on a rotary table or a conveyor, and the object to be processed is irradiated with microwaves and dried. Furthermore, a microwave drying apparatus as shown in FIG. 3 is also known. That is, the drying apparatus shown in FIG. 3 includes a vertical drying container 60, a horizontal stirring blade 62 attached to a vertical rotating shaft 61 protruding from the bottom of the drying container 60, and a side wall of the drying container 60. The microwave obtained by the microwave transmitter 65 is irradiated from the upper part of the drying container 60. Therefore, when a predetermined amount of an object to be processed is placed in the drying container 60 and the horizontal stirring blade 62 and the chopper blade 53 are rotationally driven and irradiated with microwaves, the object to be processed S is dried.

  Patent Document 2 describes a drying apparatus 71 that is a horizontal apparatus and that is continuously charged with powder or granules and dried. As shown in the front cross-sectional view of FIG. 4, the drying device 71 described in Patent Document 2 includes a heat treatment tank 72 formed in a horizontally long shape, and a stirring device 73 provided in the heat treatment tank 72. , Microwave devices 74, 74,... That irradiate microwaves into the heat treatment tank 72 from above the heat treatment tank 72, and a dehumidified air supply device 75 that supplies dehumidified air into the heat treatment tank 72. It is composed of In the heat treatment tank 72, a material inlet 72a for supplying a material into the heat treatment tank 72 is provided at the upper right side in FIG. 4, and a material outlet 72b is provided at the lower left side opposite to the material inlet 72a. Is provided with a dehumidified air supply hole 72c supplied from the dehumidified air supply device 75, and an exhaust port 72d is provided near the material inlet 72a. The stirring device 73 is provided on the outside of the heat treatment tank 72 and a horizontal rotation shaft 76 provided below the heat treatment tank 72, stirring rods 77, 77,... Fixed to the horizontal rotation shaft 76, and horizontally. The motor 78 drives the rotating shaft 76. Therefore, when materials such as powder and granules are introduced from the material inlet 72a, the stirring device 73 is driven and dehumidified air is supplied, and microwaves are irradiated from the microwave devices 74, 74,. Is dried while being stirred and conveyed downstream, and discharged from the material outlet 72b.

  Patent Document 3 describes a drying device 81 in which raw garbage is charged and dried in a batch manner. As shown in FIG. 5, the drying device 81 described in Patent Document 3 includes a rotary drum 82 supported by a predetermined support mechanism so that the axis of rotation is horizontal, and the rotary drum 82 is provided in the rotary drum 82. A hot air supply device 83 that supplies hot air and a microwave device 84 that irradiates the rotating drum 82 with microwaves are configured. Below the rotary drum 82, a rotary drive device 86 is provided so that the rotary drum 82 can be rotated. On the peripheral wall of the rotary drum 82, an openable / closable hatch 87 is provided, so that garbage can be collected in the drum. It can be inserted into or discharged from the drum. The microwave device 84 is provided with a waveguide 88 that guides the microwave, and the waveguide 88 is inserted through an opening 82 a opened at the center of the end plate of the rotary drum 82 and is directed obliquely downward. Therefore, the microwave irradiated from the microwave outlet 89 of the waveguide 88 is irradiated to the lower part in the rotary drum 82. The hatch 87 is opened, predetermined garbage is put into the rotary drum 82, and the hatch 87 is closed. The rotary drum 82 is rotationally driven by the rotation driving device 86 and hot air is supplied from the hot air supply device 83. Then, microwaves are irradiated. Then, the microwave is irradiated to the lower part of the garbage rotating in the rotary drum 82, and the garbage is dried. After drying until the predetermined moisture content is reached, the rotary drum 82 is stopped and the garbage is discharged from the hatch 87.

  By the way, although the drying apparatus is not provided, various mixing / granulating apparatuses provided with the mixing blade and the chopper blade have been proposed by the present applicant. The mixing and granulating apparatus proposed by the present applicant is basically composed of a horizontal mixing container, a rotating shaft provided in the mixing container, a double-winged shovel blade attached to the rotating shaft, a mixing It is comprised from the chopper blade | wing etc. which were provided so that it might protrude inside from the wall part of the container. Therefore, when the rotation shaft is driven to rotate, the chopper blade is driven to rotate at a speed higher than the rotation speed of the rotation shaft by another electric motor, and the object to be processed is supplied into the mixing container, the object to be processed is a two-wing type. It is scooped up by the shovel blade and subjected to the mixing action while falling by gravity. The workpiece to be mixed is transferred toward the chopper blade by the double-blade type shovel blade, and is subjected to a strong shearing and dispersing action by the chopper blade that is driven to rotate at high speed. As a result, the workpiece is mixed, dispersed or granulated in a relatively short time.

According to the drying method described in Patent Document 1, since microwaves are used, moisture adhering to the surface of the molded combustible material is given latent heat and evaporated to be dried. However, since a drying apparatus is not disclosed, it is difficult to recognize that the microwave is irradiated efficiently without any knowledge of the state in which the microwave is irradiated. Further, according to the drying apparatus shown in FIG. 3, since the horizontal stirring blades 62 and the chopper blades 63 are provided, the workpiece S is irradiated in a state of mutual movement, but it simply moves relative to each other. In this case, it is difficult to recognize that the object S is irradiated in a high density state and the object S is irradiated uniformly, and the drying efficiency seems to be low. According to the drying device 71 described in Patent Document 2, although the material is stirred by the stirring rods 77, 77,..., The material stays below the heat treatment tank 72 only by stirring. Therefore, since microwaves are irradiated in a dense state where materials are densely packed, it cannot be said that the irradiation efficiency is high, and drying is considered to be insufficient. In the drying device 81 described in Patent Document 3, since it is processed in a batch type, it seems that the garbage in the rotating drum 82 can be dried until the water content becomes uniform. Since the garbage is not sufficiently stirred in the axial direction in the rotary drum 82, drying may be uneven. Moreover, since microwaves are irradiated to the lower part in the rotating drum 82 where garbage is densely packed, that is, microwaves are irradiated to raw garbage with high density. Irradiation efficiency is low, and it may take a long time to dry.

  According to the mixing / granulating device described above, a large amount of material to be processed is transferred almost continuously to the chopper blades, and is subjected to a strong mixing / dispersing action by the chopper blades so that they can be mixed uniformly in a short time. Is obtained. Further, the objects to be processed collide with each other at the mixing / dispersing position at the substantially central position in the axial direction. Also by this, the outstanding effect that mixing of a to-be-processed object is accelerated | stimulated is acquired. However, there are also points to be improved. For example, it is a single-function device that only performs the granulation function, and the rotating shaft is long in the axial direction, so that the cylindrical mixing container is also long, and machining of its inner peripheral surface is costly and accurate. It is difficult from the aspect. Furthermore, in order to dry the granulated workpiece, there is a disadvantage that a drying apparatus is required separately.

   An object of the present invention is to provide a floating diffusion type drying apparatus that solves the problems of the conventional apparatus as described above. Specifically, the irradiation efficiency of microwaves on the object to be processed is high, and drying is performed in a short time. Therefore, it is an object of the present invention to provide a floating diffusion type drying apparatus that is capable of uniformly drying the object to be processed without causing a problem of thermal deterioration of the object to be processed. Another object of the present invention is to provide a floating diffusion type drying apparatus that can obtain the necessary mixing and dispersing action, can be machined at low cost, and has no problem in strength. Still another object of the present invention is to provide a floating diffusion drying apparatus that can be dried after granulation.

  In order to achieve the above-mentioned object, the present invention comprises a cylindrical processing container arranged in a horizontal direction, a plurality of flat blades, a chopper blade, and a microwave transmitter, or a vacuum source. The chopper blade and the flat blade are each driven at an independent peripheral speed, and the suction port connected to the microwave irradiation window and the vacuum source is an upper portion of the processing container. Is provided. Further, the plate-like flat blades are attached to the rotating shaft at predetermined intervals in the axial direction while being deviated by a predetermined angle with respect to the rotating shaft or shaken by a predetermined angle. Accordingly, the plate-like flat blade also has an effect of feeding the object to be processed in the axial direction. Furthermore, the width or the axial length of the drying container is configured in the range of 0.5 to 1.0 of the diameter of the drying container.

  Further, since the drying container is short in the axial direction, its inner peripheral surface is precisely machined at low cost. The plate-like flat blade has a substantially fan-shaped planar shape, and at least the arc portion of the outer peripheral portion thereof is machined with high accuracy. As described above, since the inner peripheral surface of the processing vessel and the arc portion of the plate-like flat blade are machined, the gap between them can be reduced, and the gap between them is a minute clearance of 3 mm or less. It is comprised so that it may become.

Thus, in order to achieve the above object, the invention described in claim 1 is configured as follows.

That is , the invention according to claim 1 is attached to the horizontal rotating shaft, the cylindrical processing container arranged in the horizontal direction, the horizontal rotating shaft provided rotatably in the processing container, and the horizontal rotating shaft. A plurality of flat blades, a chopper blade provided so as to face the inside from the wall of the processing container, and a microwave transmitter for irradiating the processing container with microwaves through a microwave irradiation window; The chopper blade is provided in a mixing / dispersion zone at a substantially central portion in the axial direction of the processing vessel and at a position offset by a predetermined amount from the bottom portion, and the flat blade is at least two It consists of a pair of four plate-like flat blades, and a pair of the two pairs of plate-like flat blades has a surface that is swung at a predetermined angle with respect to the horizontal rotation axis and is on one side of the mixing / dispersing area. position The other pair is attached to the horizontal rotating shaft so that the other pair is swung in the opposite direction and is located on the other side of the mixing / dispersing zone, and the chopper blade and the flat blade are each at independent peripheral speeds. The microwave irradiation window is provided at an upper portion of the processing container. According to a second aspect of the present invention, a cylindrical processing container disposed in the horizontal direction, a horizontal rotating shaft provided in the processing container so as to be rotationally driven, and the horizontal rotating shaft are attached. A plurality of flat blades, a chopper blade provided so as to face the inside from the wall of the processing container, a microwave transmitter for irradiating the microwave into the processing container through a microwave irradiation window, and suction A drying apparatus comprising a vacuum source for reducing the pressure inside the processing vessel through a mouth, wherein the chopper blade is a mixing / dispersing zone at a substantially central portion in the axial direction of the processing vessel and a predetermined amount from the bottom. Provided in a biased position, the flat blade is composed of at least two pairs of four plate-like flat blades, and a pair of the two pairs of plate-like flat blades has a surface with respect to the horizontal rotation axis. Predetermined angle So that the other pair is swung in the opposite direction so as to be positioned on one side of the mixing / dispersing zone and attached to the horizontal rotating shaft so as to be positioned on the other side of the mixing / dispersing zone, The blades and the flat blades are driven at independent peripheral speeds, and the microwave irradiation window and the suction port are provided in the upper part of the processing container. The invention according to claim 3 is the apparatus according to claim 1 or 2 , wherein the axial length of the processing vessel is selected to be 0.5 to 1.0 times the diameter of the vessel. The inner peripheral surface of the processing vessel and at least the arc portion of the plate-like flat blade are machined, and the interval between the inner peripheral surface of the vessel and the arc portion is configured with a small clearance of 3 mm or less. The invention according to claim 4 is the apparatus according to any one of claims 1 to 3, wherein the flat blade has a peripheral speed of 0.1 to 5.0 m / s and the chopper blade has a speed of 500 to 500. It is configured to rotate at 4200 rpm.

As described above, according to the present invention, the cylindrical processing container disposed in the horizontal direction, the horizontal rotation shaft provided rotatably in the processing container, and the horizontal rotation shaft are attached. Since it consists of a plurality of flat blades and a microwave transmitter that irradiates microwaves into the processing container, the flat blades are driven at a predetermined peripheral speed to pick up and drop the object to be processed by a predetermined angle. the floating diffusion state Te, and can be irradiated with microwaves, i.e., as it can be irradiated with microwaves in the state to be treated lower density, increases drying efficiency by microwave, short Can be dried. Therefore, there is no problem of heat deterioration due to drying. Further, it is possible to irradiate the object to be processed in the floating diffusion state, the object to be treated is mutually moved, neither may like to adhere to each other, since the microwave can be irradiated from a position above the processing container The irradiation window made of an insulator generally provided at the microwave inlet is not blocked by the object to be processed. Furthermore, when the object to be processed is scooped up with a flat blade, the object to be processed is sufficiently stirred and dried in a batch, so that the object to be processed is uniformly dried and drying unevenness does not occur. Moreover, since it has a chopper blade | wing , it can drive and drive | dry this blade | wing and the effect of being crushed even if mutual adhesion arises between to-be-processed objects is further acquired. Further, according to the invention provided with a vacuum source, in addition to the above effects, the inside of the processing container can be depressurized when irradiating microwaves, so that the boiling point of water or solvent is lowered and evaporation is promoted. , And the evaporated water and solvent are forcibly discharged. Thereby, the effect which can be efficiently dried in a short time, without exposing a to-be-processed object to high temperature is further acquired.

  A plurality of flat blades, a chopper blade, and a microwave transmitter, the chopper blade and the flat blade are each driven at an independent peripheral speed, and the microwave irradiation window is According to the invention provided in the upper part of the processing vessel, or according to the invention further provided with a vacuum source, the microwave irradiation window is provided in the upper part so that the object to be processed containing moisture does not adhere. It is possible to prevent a problem that an object adheres to the microwave irradiation window and is excessively heated and burnt. And according to such an apparatus, various processes can be performed. For example, when the flat blade is driven at a predetermined peripheral speed and the chopper blade is driven, and the microwave is irradiated from the microwave transmitter, the drying treatment can be performed as described above, and the chopper blade is stopped. Only a flat blade | wing can be driven and a pellet-like to-be-processed object can also be dried. At this time, the inside of the processing container can be decompressed by a vacuum source. If it does so, the effect as mentioned above will be acquired.

  Further, the microwave transmitter and the vacuum source can be stopped and mixed or granulated. That is, the flat blade is driven at a relatively low speed. Further, the chopper blade is driven to rotate at a high speed. Then, when the object to be processed is supplied, the object to be processed is mixed by the flat blade and sent to the mixing / dispersing zone. At this time, the objects to be processed collide with each other in the mixing / dispersing region and receive a mixing action. And it accumulates. The object to be treated is subjected to a strong mixing / dispersing action by the chopper blades and granulated in a short time.

  After granulation as described above, the microwave can be activated and the inside of the processing container can be decompressed, and the drying process can be performed as described above. Also at this time, since the microwave irradiation port or the suction port is provided in the upper part of the processing container, the above-described effects can be obtained. In addition, according to the invention in which the axial length of the processing container is selected to be 0.5 to 1.0 times the diameter, the axial length is shortened, so that the workpiece is axially The effects of being able to move relative to each other and sufficiently agitate to dry uniformly and to machine the inner peripheral surface of the drying container at low cost are also obtained. Further, the inner peripheral surface of the processing container and the arc portion of the plate-like flat blade are machined, and the interval is configured to have a minute clearance of 3 mm or less, so that the remaining amount of the object to be discarded after processing is small. The economic effect is also obtained. Furthermore, according to the invention in which the flat blades can rotate at a peripheral speed of 0.1 to 5.0 m / s and the chopper blades can rotate at 500 to 4200 rotations / minute, Accordingly, an appropriate drying process can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of this invention typically, (a) is the whole, and the (a) is sectional drawing equivalent to the figure seen in the arrow II direction in (a). FIG. 2 is a diagram showing the operation of the present embodiment, in which (a) is a side view showing a state where a flat blade is rotated and tilted, (a) is a schematic diagram showing a horizontal state, (c) ) Is a schematic diagram showing a state rotated by θ in the horizontal direction. It is sectional drawing which shows the conventional vertical rotating shaft type drying apparatus. It is sectional drawing which shows the conventional continuous-type drying apparatus provided with the horizontal rotating shaft and the stirring rod. It is a front view which shows the conventional batch type drying apparatus provided with the rotating drum which rotates around a horizontal axis | shaft.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a floating diffusion drying apparatus according to the present embodiment, in which (A) is a whole, and (A) is a cross-sectional view corresponding to a view seen in the direction of arrow E in (A). However, as shown in these drawings, the floating diffusion type drying apparatus according to the present embodiment is roughly a cylindrical processing container arranged so that the axis is in the horizontal direction. 1 and a drive unit 10 which is detachably attached to a side portion of the processing container 1. When the drive unit 10 is attached to the side of the processing container 1, the rotating shaft 15 provided on the drive unit 10 projects in a cantilever manner into the processing container 1 and rotates in the processing container 1. It is designed to be driven. Further, a chopper 30 is provided obliquely below the wall of the processing container 1 as will be described in detail later.

  A microwave irradiation window 42 made of an insulating material is provided in the upper part of the processing container 1 configured as described above, and similarly, a suction port 52 for exhausting air in the processing container 1 is provided at a predetermined upper position. It has been. A waveguide 41 connected to the microwave transmitter 40 is connected to the microwave irradiation window 42, and a vacuum insulating portion 42 a made of quartz glass, ultrahigh molecular weight polyethylene or the like is provided at the tip of the waveguide 41. Yes. A vacuum pump 50 is connected to the suction port 52 via a bag filter 51.

  More specifically, the cylindrical processing container 1 has a circular cross-sectional shape, and the left side portion is closed by the side plate 2 in FIG. According to the present embodiment, the flange 3 is provided on the other side of the processing container 1. The side plate 11 of the drive unit 10 is attached to the flange 3 by a fixing means such as a bolt and a nut when attaching and detaching. In the substantially central portion of the processing vessel 1 in the axial direction, in other words, in the mixing / dispersing zone X in the vicinity of the substantially central portion in the axial direction, there are chemicals such as pigments / dyes, chemicals, foods, industrial products such as building materials, cement, etc. A material supply port 4 for supplying an object to be processed such as a liquid supply port 5 and a liquid supply port 5 for supplying an additive liquid such as water are provided. Moreover, the product discharge port 6 dried or granulated is provided in the lower part. The product discharge port 6 is provided with a lid that is opened and closed by, for example, a piston cylinder unit, but is not shown in FIG.

  The axial width or length L of the processing vessel 1 configured in this way is selected to be 0.5 to 1.0 of the diameter D. According to this embodiment, since the axial length L of the processing container 1 is as short as the diameter, the inner peripheral surface of the processing container 1 is precisely finished at low cost by machining.

  According to the present embodiment, the processing container 1 described above is attached to a gantry, although not shown in the figure. The gantry extends rightward in FIG. 1A and continues to the guide rails 12 and 12. .. Are provided on the lower part of the drive unit 10, and these wheels 13, 13,... Ride on the guide rails 12, 12 and are indicated by an arrow A in FIG. It is movable in the horizontal direction and is detachable from the side of the processing container 1 described above. In this way, an electric motor that rotationally drives the rotary shaft 15, a control device that controls the rotational speed of the electric motor, and the like are provided inside the drive unit 10 that is configured to be detachable.

  The rotary shaft 15 protrudes from the side of the drive unit 10 in a cantilever manner. The rotation shaft 15 has substantially the same length as the axial length L of the processing container 1. Therefore, when the drive unit 10 is attached to the side portion of the processing container 1 using the side plate 11, the rotating shaft 15 is supported and cantilevered in the processing container 1. This state is shown in FIG. Further, when the drive unit 10 is removed from the processing container 1, the rotating shaft 15 can be taken out from the processing container 1. Further, although not specifically shown in FIG. 1, the rotary shaft 15 can be pulled out from the drive unit 10.

  The first blade arms 16, 16 are attached to the rotary shaft 15 configured in this manner, and the second blade arms 17, 16 are spaced apart from the first blade arms 16, 16 in the axial direction. 17 is attached. That is, the first and second blade arms 16 and 17 are respectively attached to both sides of the mixing / dispersing zone X at the substantially central portion in the axial direction of the processing vessel 1. These first and second blade arms 16, 17 are offset from each other by 90 degrees. In other words, it is attached in a cross shape when viewed from the side. And the mixing blade | wing is attached to each front-end | tip part of these blade | wing arms 16 and 17. FIG.

  In the present embodiment, the four mixing blades are composed of plate-like flat blades 18 having the same shape. More specifically, as shown in FIG. 1A, the arc portion 18a located on the inner peripheral surface 1a side of the processing container 1 is a circle having substantially the same curvature as the inner peripheral surface 1a of the processing container 1. The central portion 18b attached to the arc shape and the first and second blade arms 16 and 17 is formed wide so that the planar shape as a whole has a substantially sector shape. At least the arc portion 18a of the flat blade 18 is precisely machined.

  The first flat blades 18 ′ and 18 ′ are close to the first blade arms 16 and 16 so that the clearance between the arc portion 18a and the inner peripheral surface 1a of the processing container 1 is, for example, 3 mm or less. And when the rotating shaft 15 is rotationally driven in the direction of arrow B, the workpiece is attached at a predetermined angle so as to be sent to the left mixing / dispersing zone X. The second flat blades 18 ″ and 18 ″ are close to the second blade arms 17 and 17 so that the clearance between the arc portion 18a and the inner peripheral surface 1a of the processing vessel 1 is similarly 3 mm or less. When the rotary shaft 15 is rotationally driven in the direction of the arrow B, the workpiece is attached at a predetermined angle so that the workpiece is sent toward the right mixing / dispersing zone X. As shown in FIG. 1A, there is a relatively large gap between the circumferential directions of the adjacent flat blades 18 'and 18' attached in this way. Since there is such a large interval, when the first and second flat blades 18 'and 18 "rotate, the object to be processed is mixed and dispersed so that it is beaten, unlike a continuous screw. Become.

  The structure of the chopper 30 is well known in the art and will not be described in detail. However, as shown in FIG. 1 (a), the chopper 30 is composed of chopper blades 31, 31,. Yes. .. Are attached obliquely below the processing container 1 such that the chopper blades 31, 31,... Are positioned inside the processing container 1, and the electric motor 32 is positioned outside. Further, the chopper blades 31, 31,... Attached to the chopper shaft can be disassembled inside the processing container 1, and the chopper shaft seal can also be removed. The chopper 30 configured as described above is driven to rotate by the electric motor 32 independently of the rotation of the rotating shaft 15.

  The attachment position of the chopper 30 will be described in more detail. The chopper 30 is provided in the following position in the mixing / dispersion zone X that does not interfere with the first and second flat blades 18 ′ and 18 ″. That is, the object to be processed is the first and second flat blades. When 18 'and 18 "are rotated at a predetermined speed, they are deposited in the shape T as shown in FIG. 1 (a). At a position deviated by about 60 degrees.

  Next, the operation of the above embodiment will be described. The side plate 11 of the drive unit 10 is attached to the flange 3 of the processing container 1. Then, it is assembled as shown in FIG. Therefore, as will be described below, the object to be treated can be dried batchwise, the object to be treated can be similarly granulated batchwise, or further dried after granulation.

  (A) When drying an object to be treated such as the above-mentioned dye, chemical, food, etc .: 2 m / s or more, for example, so that the peripheral speed of the first and second flat blades 18 ′, 18 ″ becomes a predetermined speed. The chopper 30 is driven as necessary, and a predetermined amount of the object to be processed s is supplied from the material supply port 4. Then, the object to be processed s is the first and second flat blades 18 '. , 18 ″, it is lifted up to a predetermined angle or a predetermined height along the peripheral wall of the processing container 1, and eventually falls away from the peripheral wall in a floating diffusion state. This floating and diffused state is indicated by a number of points in FIG. The microwave transmitter 40 is activated to irradiate the workpiece s in the floating diffusion state with microwaves. The water adhering to the workpiece s boils and dries instantly. At this time, when the vacuum pump 50 is activated, the inside of the processing container 1 is depressurized and the boiling point of water is lowered. Also, evaporation is promoted and moisture is discharged. Thereby, the to-be-processed object s can be dried in a short time, without exposing to high temperature. After drying for a predetermined time, the product discharge port 6 is opened and the dried product is taken out. According to the present embodiment, the object to be processed s is dried in a state of mutual movement, so the problem of mutual adhesion of the objects to be processed is small. Moreover, even if it adheres mutually, it can be crushed by starting the chopper 30.

  When the drying process is performed as described above, the workpiece s is scooped up on the surface of the flat blade 18 and dropped by gravity when lifted by a predetermined angle. The movement of the workpiece s will be described in more detail with reference to FIG. The object to be processed s squeezed by the flat blade 18 is subjected to the force of gravity and centrifugal force, and also slides on the flat blade 18 in response to the drag from the flat blade 18 that is swung at a predetermined angle. Become. At this time, the slip can be divided into components in two directions. The first component is a component indicated by the arrow Y1 in FIG. 2A along the longitudinal direction of the flat blade 18 and is a slip component in the circumferential direction. The second component is a component indicated by an arrow Y2 in FIG. 2A in a direction perpendicular to the rotation axis 15. The directions of the first component and the second component of the slip are orthogonal to each other. When the flat blade 18 rotates upward from the lowest position, the workpiece s is scooped by the flat blade 18. Until the flat blade 18 reaches a horizontal position with respect to the rotation shaft 15, both centrifugal force and gravity act on the workpiece s in the direction of the second component, so that the workpiece s is in the direction of the second component. And is pressed against the peripheral wall of the processing container 1. FIG. 2A schematically shows a cross section of a portion of the flat blade 18 that is horizontal to the rotating shaft 15. A state in which the workpiece s slides in the direction of the arrow Y <b> 2 ′, that is, in the circumferential wall direction of the processing container 1 in FIG.

  At this time, the object to be processed s slides in the first direction Y1 and falls in the circumferential direction. However, since the object to be processed s is pressed against the peripheral wall of the processing container 1, The amount is small.

  When the flat blade 18 is rotationally driven upward by θ from the horizontal direction, a gravitational component larger than the centrifugal force acts as shown by a chain line arrow Y3 in FIG. Is away from the peripheral wall of the processing vessel 1. Then, it slides in the circumferential direction, that is, the direction of the first component and falls from the flat blade 18, and also slides in the central direction, that is, the direction opposite to the direction of the second component, and falls. By the fall in the circumferential direction and the fall in the center direction, the workpiece s is brought into a floating diffusion state as indicated by a large number of points in FIG. FIG. 1A shows an ideal floating diffusion state. The angle θ formed by the flat blade 18 and the horizontal direction when the ideal floating diffusion state is reached depends on the physical state of the workpiece. In general, it is preferably 40 to 85 degrees, although it is determined from the physical properties, the friction coefficient of the surface of the flat blade 18 and the like. That is, it is desirable that the flat blade 18 is driven to rotate at a peripheral speed so that the flat blade 18 starts dropping at 40 degrees and completely falls at 85 degrees.

  (B) When simply granulating: The microwave transmitter and the vacuum pump are stopped. The rotary shaft 15 is driven at a set relatively low speed. Further, the chopper blades 31, 31,... Are rotated at high speed by the electric motor 32. A predetermined amount of the object to be processed is supplied from the material supply port 4. Further, after a predetermined time has elapsed, liquid is supplied from the liquid supply port 5 as necessary. The supplied workpieces are mixed by the first flat blades 18 ′ and 18 ′ that are rotationally driven in the direction of arrow B in FIG. 1A, and sent to the mixing / dispersing zone X. The second flat blades 18 ″ and 18 ″ are mixed in the same manner with a delay of 90 degrees as viewed in the rotation direction, and sent to the mixing / dispersion zone X. In this way, the workpieces sent by the first flat blades 18 ′ and 18 ′ and the workpieces sent by the second flat blades 18 ″ and 18 ″ collide with each other in the mixing / dispersion zone X. Subject to mixing action. And it deposits as mentioned above. This accumulated state is indicated by a symbol T in FIG. Since the chopper blades 31, 31,... Are provided at the deposition positions, the object to be processed is subjected to a strong mixing / dispersing action and is granulated in a short time. Open the product outlet 6 and take out the granulated product. According to the present embodiment, since it is short in the axial direction, the workpiece to be supplied is immediately sent toward the chopper blade and subjected to a strong mixing / dispersing action, and for a very short time, for example, 2 to 10 minutes. Granulated with. Furthermore, since the mixing blade is made of a plate-shaped flat blade, the strength is high and the manufacturing is easy.

  (C) When drying after granulation: After granulation as in (b) above, the peripheral speed of the first and second flat blades 18 ′, 18 ″,... The microwave transmitter 40 and the vacuum pump are adjusted so that the angle θ between the flat blade 18 and the horizontal direction is in the range of 40 to 85 degrees, and the chopper 30 is stopped or the speed is adjusted as necessary. Then, the granulated product is dried as described in (a) above, and the product outlet 6 is opened to take out the dried granulated product.

  (D) When drying resin pellets formed by another apparatus: The chopper 30 is removed from the processing container 1. Alternatively, the chopper blades 31 are removed from the chopper shaft. Then, the first and second flat blades 18 ′ and 18 ″ are driven so that the peripheral speed becomes a predetermined speed, for example, at a speed of 2 m / s or more. The resin pellets formed by the above apparatus, for example, polypropylene pellets, are supplied. Then, the pellets are pressed by the first and second flat blades 18 'and 18 "along the peripheral wall of the processing vessel 1 at a predetermined angle or It is lifted to a predetermined height, and eventually falls away from the peripheral wall in a floating diffusion state into the space. The microwave transmitter 40 is activated to irradiate the pellets in the floating diffusion state with microwaves. Solvents such as chloroform contained in the pellets evaporate. At this time, when the vacuum pump 50 is activated, the inside of the processing container 1 is depressurized and further evaporation is promoted. Thereby, it can dry in a short time, without exposing a pellet to high temperature. After drying for a predetermined time, the product discharge port 6 is opened and the dried pellet is taken out.

DESCRIPTION OF SYMBOLS 1 Processing container 4 Material supply 10 Drive unit 15 Rotating shaft 18 '1st flat blade | wing 18 "2nd flat blade | wing 18a Arc part 30 Chopper 40 Microwave transmitter 42 Microwave irradiation window 50 Vacuum pump 52 Suction port X Mixing and mixing Distributed area

Claims (4)

A cylindrical processing container disposed in the horizontal direction, a horizontal rotating shaft provided rotatably in the processing container, a plurality of flat blades attached to the horizontal rotating shaft, and the processing A drying device comprising a chopper blade provided so as to face the inside from the wall of the container, and a microwave transmitter for irradiating microwaves into the processing container through a microwave irradiation window,
The chopper blade is provided in a mixing / dispersing region at a substantially central portion in the axial direction of the processing vessel and at a position deviated by a predetermined amount from the bottom portion,
The flat blade is composed of at least two pairs of four plate-like flat blades, and the pair of the two pairs of plate-like flat blades has a surface that is swung by a predetermined angle with respect to the horizontal rotation axis, and the mixing is performed. The other pair is shaken in the opposite direction so as to be located on one side of the dispersion zone and attached to the horizontal rotation shaft so as to be located on the other side of the mixing / dispersion zone,
The chopper blade and the flat blade are each driven at an independent peripheral speed, and the microwave irradiation window is provided in an upper portion of the processing vessel, and the floating diffusion drying apparatus. A cylindrical processing container disposed in the horizontal direction, a horizontal rotating shaft provided rotatably in the processing container, a plurality of flat blades attached to the horizontal rotating shaft, and the processing A chopper blade provided so as to face the inside from the wall portion of the container, a microwave transmitter for irradiating microwaves into the processing container through a microwave irradiation window, and the inside of the processing container through a suction port A drying device comprising a vacuum source for decompression,
The chopper blade is provided in a mixing / dispersing region at a substantially central portion in the axial direction of the processing vessel and at a position deviated by a predetermined amount from the bottom portion,
The flat blade is composed of at least two pairs of four plate-like flat blades, and the pair of the two pairs of plate-like flat blades has a surface that is swung by a predetermined angle with respect to the horizontal rotation axis, and the mixing is performed. The other pair is shaken in the opposite direction so as to be located on one side of the dispersion zone and attached to the horizontal rotation shaft so as to be located on the other side of the mixing / dispersion zone,
The chopper blade and the flat blade are each driven at an independent peripheral speed, and the microwave irradiation window and the suction port are provided in an upper portion of the processing container. A floating diffusion drying device. 3. The apparatus according to claim 1 , wherein an axial length of the processing container is selected to be 0.5 to 1.0 times a diameter of the processing container, and an inner peripheral surface of the processing container The floating diffusion is characterized in that at least an arc portion of the plate-like flat blade is machined, and a space between an inner peripheral surface of the container and the arc portion is configured to have a minute clearance of 3 mm or less. Mold drying device. 4. The apparatus according to claim 1, wherein the flat blade is rotated at a peripheral speed of 0.1 to 5.0 m / s, and the chopper blade is rotated at 500 to 4200 rotations / minute. A floating diffusion type drying apparatus characterized by

Images