JP2001248967A - Conical dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conical dryer capable of easily crushing a spherical lump generated at an initial stage of drying by providing a crushing means of a simple structure, and improving a drying efficiency by preventing a generation of a damage or a noise of the dryer or a drying unevenness. SOLUTION: The conical dryer comprises a polygonal container body supported by a rotary shaft at an axial center of right and left side faces, a hollow suction tube projected from a hollow rotary shaft side in the body, a suction means connected to the tube, and a container rotary driver connected to the shaft. The dryer further comprises a charging and discharging port of a material to be treated provided a one end side of the body in a vertical direction, and the crushing means of the material provided at the other opposite end side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conical dryer for drying a solid, which has been wetted with water or a solvent, in a chemical product, a pharmaceutical product or a food product.

[0002]

2. Description of the Related Art Conventionally, as a dryer for drying a wet solid material such as a chemical product, a pharmaceutical product, or a food product, a rectangular, hexagonal, or octagonal shape having a symmetrical vertical cross section from a horizontal axial center portion. The container body having a polygonal shape, the rotating shafts respectively supported by the axial portions of the left and right side surfaces of the container body, and at least one of the rotating shafts is hollow, and is provided coaxially with the hollow rotating shaft inside the container body. A protruding hollow suction pipe, suction means connected to the suction pipe, a container rotation driving device connected to one of the rotating shafts, and a processing object inlet / outlet provided at one vertical end of the container body And a conical dryer having the following. Further, the container main body generally has a shape in which the container has a double jacket structure and the object to be processed is heated by a heat medium such as steam or hot water.

The object to be treated, which is a solid in the wet state, is:
At the initial stage of drying, it is easy to become spherical agglomeration. However, in the conventional conical dryer, a large-sized machine having a diameter of the container body of 1 m or more is mainly used, and the processing object raised with the rotation of the container body is high. Since falling from the position causes a large collision energy, the spherical mass can be sufficiently disintegrated, and the necessity of installing a disintegration device in the container body is small.

[0004]

However, depending on the properties of the object to be treated, the viscosity of the object is extremely large, and there are many demands for drying with a conical dryer for those in which spherical lumps are difficult to be broken only by the impact energy due to falling. ,
If the mass is maintained as it is, it becomes a mass with high strength that cannot be easily disintegrated, and the hollow suction tube protruding into the container body is deformed or damaged by the collision energy due to the falling of the mass. There is also a problem that noise such as a collision sound may increase.

[0005] Further, even when drying an object having a relatively low viscosity, a small conical dryer having a container main body having a diameter of 1 m or less has a low falling position, so that its collision energy is low.
However, since the spherical mass cannot be sufficiently disintegrated, there is a problem that drying unevenness occurs such as insufficient drying at the center of the mass.

[0006] The present invention has been made in view of the above problems, and by providing a crushing means having a simple structure,
The purpose of the present invention is to provide a conical dryer that can easily break up spherical lumps generated in the initial stage of drying, prevent damage to the apparatus, generate noise, or prevent uneven drying, and improve drying efficiency. It was made.

[0007]

The gist of the present invention for achieving the above object is as follows.
A container main body having a polygonal shape whose vertical section from the horizontal axial center is symmetrical to the left and right, a rotating shaft respectively supported by the axial centers of the left and right side surfaces of the container main body, and at least one of the rotating shafts is hollow, and A hollow suction pipe protruding into the container main body from the rotation shaft side, a suction means connected to the suction pipe, a container rotation driving device connected to one of the rotation shafts, and provided on one end side of the container main body in the vertical direction. A conical dryer, comprising: an inlet / outlet for the object to be processed; and a crushing means for the object to be processed provided at the other end side facing the object.

Further, in the invention according to claim 2,
A crushing means according to claim 1, wherein the crushing means comprises: a rotary driving device; a crushing rotary shaft protruding in a container body rotated by the rotary driving device; and a plurality of crushers protruding radially from the crushing rotary shaft. A conical dryer characterized by comprising a crushing member,
Furthermore, in the invention according to claim 3, the crushing member according to claim 2 is provided so as to protrude radially from the crushing rotation shaft and bend so as to follow a predetermined interval from the inner wall of the container body. And a conical dryer comprising a plurality of pins.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an entire conical dryer according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an explanatory view of a crushing unit according to an embodiment of the present invention.

1 is a container 2 having a double jacket structure in which the vertical cross section from the horizontal axis a is symmetrical in octagonal shape, and a loading / unloading port 5 for an object to be processed is provided at one end in the vertical direction. The container body is provided with a crushing means 4 for the object to be treated on the other end side, and has a structure in which a heating medium such as steam or hot water is supplied to the jacket portion 6 to heat the object to be treated. Further, the container body 1 is supported by the respective rotating shafts 3a and 3b at the shaft center portions a on the left and right side surfaces, is supported by a suitable bearing device, and is rotatable in the vertical direction. The means for heating the object to be treated preferably has a structure in which the object to be treated is heated by the jacketed container 2, but a structure in which hot air is blown into the container 2 to directly heat the object, heating by an electric heater, or the like. Is also good.

The rotary shafts 3a and 3b are formed as hollow tubes. One hollow rotary shaft 3a is coaxially inserted through the hollow of the hollow rotary shaft 3a, and a sliding contact portion is appropriately sealed. A hollow suction pipe 7 provided with a filter 71 made of a wire net is provided at the tip bent upward and provided in the container 2 with the structure sealed and projecting into the container 2. It is configured to suck and discharge steam and the like. In addition, the suction pipe 7
A straight pipe may be connected to the inside of the container 2 of the rotating shaft 3a. Further, when the heating means for the object to be processed is an electric heater or the like,
The rotating shaft 3b may not be a hollow tube.

The rotating shaft 3a is connected to a container rotation driving device 8 through a power transmission device 81 such as a gear, a pulley and a belt, and the suction pipe 7 cools steam generated in the container 2. Pressure reducing device 9 serving as suction means via a condenser 91 for condensing and condensing liquid and a condensate tank 92 for storing condensed liquid.
It is connected to the. Further, the other hollow rotary shaft 3b has
A heat medium supply pipe 61 and a heat medium discharge pipe 62 for supplying and discharging a heat medium into and out of the jacket portion 6 are coaxially loosely inserted and sealed with an appropriate seal structure. It is connected. The container rotation driving device 8 connected via the power transmission device 81 may be configured to be connected to the rotation shaft 3b.

The workpiece inlet / outlet port 5 provided at one end of the container body 1 is provided with a butterfly valve 51 therein, and has a flange structure at a tip end thereof. It has a structure that is connected to the object discharge pipe. Further, the crushing means 4 for the object to be treated provided on the other end side facing the inside is provided with a rotation driving device 41 attached to the container 2 via the shaft sealing portion 44 and a container body rotated by the rotation driving device 41. And a crushing member 43 composed of a plurality of pins protruding radially from the crushing rotation shaft and bent from the inner wall of the container body at a predetermined interval. The crushing member 43 preferably has a pin structure because it has high strength and can reduce crushing resistance, but may have a long plate shape or a wing shape.

Reference numeral 10 denotes driving and stopping of the container rotation driving device 8 and the rotation driving device 41, rotation control such as the rotation speed of the container body 1, supply and stop of the heat medium, and temperature control of the processing object by adjusting the flow rate. And a control device for controlling the opening and closing of the butterfly valve 51 provided in the inlet / outlet 5 for the object to be processed and other various means in the conical dryer.

Next, the operation of the conical dryer configured as described above to dry an object to be processed, which is a wet solid in a chemical, pharmaceutical or food, will be described below. The loading / unloading port 5 of the workpiece provided at one end of the container body 1 is positioned upward, connected to a workpiece supply pipe (not shown) via a flange portion, and disposed at the loading / unloading port 5. The butterfly valve 51 is opened, and the processing object is supplied into the container 2 from the processing object supply pipe. After a predetermined amount of the object to be processed is supplied into the container 2, the butterfly valve 51 is closed.

The container rotation driving device 8 is operated to rotate the container main body 1 via the power transmission device 81. The container rotation driving device 8 also rotates the container main body 1 from the heating medium supply pipe 61 connected to a heating medium heating and supplying device (not shown). The object to be processed is heated by supplying a heat medium such as steam or hot water, and the decompression device 9 is operated to decompress and suction the vapor generated in the container 2 from the suction pipe 7. The pressure in the container 2 is reduced by the reduced pressure suction, and the object to be processed can be efficiently dried by the reduced pressure evaporation effect.

The heat medium supplied from the heat medium supply pipe 61 flows through the jacket section 6 and is circulated from the heat medium discharge pipe 62 to the heat medium heat supply device. Further, the vapor sucked from the suction pipe 7 is cooled by the condenser 91 and condensed,
The condensed liquid is stored in the condensed liquid tank 92. The solid content of the processing object entrained by the vapor sucked from the suction pipe 7 is filtered and separated by the filter 71 provided at the distal end, and thus does not flow into the decompression device 9 or the like.

At the same time as the rotation of the container body 1 or depending on the nature of the object to be processed, the rotation driving device 41 of the crushing means 2 is operated slightly later, and the crushing rotation shaft 42 rotated by the rotation driving device 41 projects. The plurality of crushing members 43 provided are rotated, and the spherical mass generated mainly in the initial stage of drying is crushed by the shearing force. Normally, the rotation of the crushing member 43 is continued until the drying of the object to be processed progresses as appropriate and no lump is generated. However, the rotation of the container body 1 may be stopped simultaneously.

After the drying of the object to be processed is completed, the rotation of the container body 1, the operation of the pressure reducing device 9 and the heating by the heat medium are stopped, and the side of the container body 1 where the inlet / outlet port 5 for the object to be processed is positioned downward. Then, it is connected to a discharge pipe (not shown), and the butterfly valve 51 of the charging / discharging port 5 is opened to discharge the dried workpiece from the discharge pipe to the outside of the container 2. After discharging the dried workpiece, the butterfly valve 51 is closed,
Return the inlet / outlet 5 side to the upper position. By repeating the above operation under the control of the control device 10, a predetermined amount of the object to be processed can be dried.

[0020]

According to the conical dryer of the present invention, by providing a simple structure of crushing means, it is possible to easily crush spherical lumps generated in the initial stage of drying, and to generate damage to the apparatus and noise. Or uneven drying can be prevented, and the drying efficiency can be improved. In particular, the structure is suitable for a small conical dryer in which the diameter of the container body is 1 m or less. Further, in the invention according to claim 2, the crushing means is a plurality of crushing members radially protruding from a crushing rotation shaft protruding into a container main body rotated by a rotary driving device. As a result, the resistance to crushing is small, the power cost can be reduced, and the spherical mass can be easily crushed. Further, in the invention according to claim 3, the crushing member is formed as a plurality of pins radially protruded from the crushing rotation shaft and bent and provided along the inner wall of the container at a constant interval. In addition, the strength is strong and the crushing resistance can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of an entire conical dryer according to an embodiment of the present invention.

FIG. 2 is a side view of the entire conical dryer according to the embodiment of FIG. 1;

FIG. 3 is an explanatory view of a crushing unit according to an embodiment of the present invention.

[Explanation of symbols]

 1: Container main body 2: Container 3a, 3b: Rotating shaft 4: Crushing means 5: Inlet / outlet for the object to be treated 6: Jacket part 7: Suction tube 8: Container rotation drive device 9: Decompression device 10: Control device 41 ： Rotation drive device 42 ： Crushing rotation shaft 43 ： Crushing member 44 ： Shaft sealing part

Claims (3)

[Claims] 1. A container body having a polygonal shape whose left and right sides are symmetrical in a vertical section from a horizontal axis, a rotating shaft respectively supported by left and right side axes of the container, and at least one rotating shaft. A hollow, a hollow suction pipe protruding from the hollow rotary shaft side into the container body, and suction means connected to the suction pipe,
A container rotation driving device connected to one of the rotating shafts, a processing object inlet / outlet port provided at one end of the container body in the vertical direction, and a processing object crushing means provided at the opposite end A conical dryer comprising: 2. A crushing means comprising: a rotary driving device; a crushing rotary shaft protruding into a container body rotated by the rotary driving device; and a plurality of crushing devices radially protruding from the crushing rotary shaft. 2. The conical dryer according to claim 1, comprising a member. 3. A crushing member comprising a plurality of pins protruding radially from a crushing rotation shaft and bent from the inner wall of the container at a predetermined interval. 2. The conical dryer according to 2.