JPH0659787U - Vacuum rotary dryer - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a technique for drying and mixing powders and granules, and aims to increase the mixing efficiency having the function of mixing powders and granules. [Structure] A can body composed of a conical type can body having an opening / closing opening provided on one side and an opening / closing port and a jacket surrounding the can body to form a hot water / warm air flow chamber. And a rotation drive mechanism in which the can body is horizontally installed via shaft bodies projecting from both ends of a shaft core so as to be orthogonal to the central axis of the conical can body, and is vertically rotated by a rotation drive motor. , Hot air that communicates with the can body and the hot water / hot air distribution chamber
It consists of a rotary joint or the like configured on one or both of the shafts that connect the hot water supply / drainage pipe to the squid, and the inner end of the can body is opened at the inner end to add powder or granules or a single or A plurality of inlet pipes are introduced through an exhaust communication pipe penetrating the shaft body, and an end portion of the exhaust communication pipe is connected to an external vacuum device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a powder and granular material drying technology and a mixing technology, and relates to a double-cone rotary vacuum dryer having a powder and granular material mixing function and excellent mixing efficiency.

[0002]

[Prior art]

 Conventionally, a double-cone type rotary vacuum dryer has been used as a drying device for powder and granules, in which a heat medium flows into the double wall of a rotating drying chamber to dry the contents, but this type of rotary vacuum drying is used. The machine does not have a mixing function and has a structure that dries while rotating the drying chamber, and mixes the powdered material or liquid to be dried in advance from the input / discharge port opened on the side wall of the drying chamber. Then, the structure is such that it is discharged after the drying process. Therefore, when using the rotating function of this device as a mixer or when it is necessary to add powders or fluids during the mixing process, the charging / discharging port is opened each time and the additive is charged. It had to be carried out by the batch process, and it was difficult to completely automate it, and there was a problem that air contact was made at each opening, making it impossible to make the mixing uniform and at the same time making quality control difficult.

[0003]

[Problems to be solved by the device]

 In other words, the conventional device has only a drying function, and is inherently mixed (“mixing” described in the present invention is a technique for mixing a plurality of powder and granular materials and other substances such as a fluid on the surface of a fluid). (It also includes coating technology and granulation technology for coating).) It had no function.

The present invention has been made in view of the above problems, and it is possible to obtain stable and high quality without thermal decomposition, thermal deterioration, etc. by drying powder or granular material under vacuum and by low temperature air drying. It can be used not only as a mixing machine but also as a mixing machine. In the mixing process, the additive powder, the added liquid, etc. can be freely charged in a sealed state, and vacuum rotary drying can be performed for uniform mixing. The purpose is to provide a machine.

[Means for solving problems]

That is, in the rotary vacuum dryer according to the present invention, a jacket is provided around the outer circumference of a can body having an inlet / outlet opening provided with an airtight lid that can be opened and closed on one side, and a hot water / hot air distribution chamber is provided. The formed can body having a double structure is horizontally traversed by shafts protruding from both ends of the shaft core and rotated by a rotary drive motor. The hot air / warm water supply / drainage pipe that communicates with the outside is connected to the outside through a rotary joint provided on the shaft body, and powder or granules with an open inner end are added to the inner cavity of the can body. One or a plurality of feed pipes are introduced through an exhaust communication pipe penetratingly formed in the shaft body, and an end portion of the exhaust communication pipe is connected to an external vacuum device.

[Work]

Therefore, when the device of the present invention is used as a dryer or a granulator, after the powdered or granular material to be dried is charged into the can through the charging / discharging port, the charging / discharging port is closed and the shaft is supported. It rotates while being driven by a rotary drive motor as a shaft to dry, and hot water at an appropriate temperature sent from the hot water supply pipe is introduced into the hot water / warm air circulation chamber and dried powder particles are passed through the wall surface of the can body. Heat and dry the body. Since the inner cavity of the can is decompressed by the vacuum device via the exhaust communication pipe, it is dried in vacuum and can be dried at low temperature, and a stable product of high quality without thermal decomposition or thermal deterioration is obtained. To be

When used as a mixer, after the powdered or granular material to be mixed is charged into the can through the charging / discharging port, the charging / discharging port is closed, and the shaft is rotated by a rotary drive motor. Mixing is carried out while tumbling.When powder or liquid is added in the mixing process, the powder or liquid to be added to the lumen of the can is added or dispersed through the feed pipe. After mixing, it will be discharged from the input / discharge port.

By forming a joint chute that automatically joins the charging / discharging port when discharging the drying or mixing, the charging / discharging of the particles can be performed without contact with the outside air. It can be carried out.

【Example】

An embodiment of the vacuum rotary dryer of the present invention will be described below with reference to the drawings.

The drawings show one embodiment of the present invention, in which reference numeral 1 is a can body 2 made of stainless steel or carbon steel, and a jacket 3 is provided around the outer periphery of a can body 2 to form a hot water / warm air flow chamber 4. The formed can body has a double structure, and an inlet / outlet port 14 provided with an airtight lid 13 that can be opened and closed is opened at one side of the can body 1 and protrudes at both ends of the axis of the can body 1. The rotating tube shaft 5 and the rotating shaft 6 are supported by the supporting frames 8 which are erected on the base respectively, and the drive gear 11 mounted on the rotating shaft 6 is passed through an appropriate drive transmission mechanism such as a speed reducer. And is rotationally connected to the rotary drive motor 12.

An exhaust communication pipe 16 is rotatably and airtightly inserted into the rotary pipe shaft 5 via a shaft sealing mechanism 15 such as a gland packing, and a branch pipe 17 protruding from one side near the end is provided. Is connected to an external vacuum device (not shown) to form a suction unit 19 provided with a filter device 18 inside the can body 2 to suck and decompress the inside of the can body 2 to a predetermined vacuum degree. And an additive water pipe 21, an additive liquid pipe 22, two atomizing air pipes 23 and 24, and an additive powder pipe 25 and 2 which communicate with each other from a port board 20 arranged in parallel at the end of the exhaust communication can 16. The needle valve air pipes 26 and 27 are inserted, the additive powder pipe 25 communicates with the nozzle pipe 28, and the additive liquid pipe 22 communicates with the spray nozzle 29.

The other rotary shaft 6 is formed by connecting an air pipe 31 and a hot water pipe 32 to an air inlet pipe 33 and a hot water supply / drain pipe 34, respectively, via a rotary joint 30 pivotally provided at the tip. The hot water pipe 32 is connected to the hot water / warm air flow chamber 4 of the can body 1 via a valve (not shown) that is operated by the air pressure from the air pipe 31.

The vacuum rotary dryer having the above structure rotates the can body 1 to dry or mix it. First, the drying operation will be described.

After the powdered or granular material to be dried is charged into the can 2 from the charging / discharging port 14, the airtight lid 13 is closed, and the rotary tube shaft 5 and the rotary shaft 6 are rotatably driven by the rotary drive motor 12. However, the inlet / outlet port 14 has a structure that automatically opens and closes an external valve (not shown) with air to prevent powder leakage at the time of inlet / outlet and to prevent waste dust. By configuring a joint shoe that automatically faces the discharge port 14 and joins, it is possible to charge and discharge the powder or granular material without contact with the outside air.

The can main body 1 introduces the hot water having an appropriate temperature sent from the hot water supply / drainage can 34 into the hot water / warm air circulation chamber through the hot water pipe 32, and the dried powder and granules through the wall surface of the can body 2. Since the inner cavity of the can body 2 is decompressed by a vacuum device via the exhaust communication can 16 and the branch can 17, it becomes possible to perform low temperature drying by performing vacuum drying. High quality stable products without thermal decomposition and deterioration can be obtained.

Next, when the vacuum rotary dryer is used as a mixer, the powdery or granular material to be mixed is charged from the charging / discharging port 14 and mixed while rotating in the same manner as the above-mentioned drying. When powder is added, it is charged into the inner cavity of the can body 2 from the nozzle pipe 28 via the addition powder pipe 25, and when the water area is filled with liquid, it is supplied from the spray nozzle 29 via the addition water pipe 21. The structure is such that it is dispersed in the inner cavity of the body 2.

Therefore, in the process of mixing the granular material to be mixed, the granular material or liquid is easily added, and the flow rate of the additive material is controlled so that uniform mixing can be performed, and the high-quality mixed granular material can be obtained. Can be obtained.

In the description of the above-mentioned embodiment, although the dryer and the mixer are separately used, the contents of the can body are mixed with the additive powder or the liquid in the drying process, and granulated or coated. It goes without saying that it can be used as a functional mixer.

[Effect of the proposal]

As described above, the vacuum rotary dryer according to the present invention includes a double-cone rotary dryer in which an additive feed pipe for adding powder and granules and a liquid, and a valve feed fluid feed pipe for the feed pipe. The device can be used as a dryer or a mixer by inserting the inlet pipe into the lumen of the pipe main body through the exhaust communication pipe.

In addition, the operation of adding other powdery or granular materials or liquids to be added in the mixing process is extremely simple, and since the can body is not opened during the addition, the quality control is excellent. is there.

Furthermore, the vacuum rotary dryer of the present invention not only has a mixing function of mixing a plurality of powders and granules and a liquid, but can also add and mix in the drying process, so that granulation, liquid addition, coating Since it can also be used as a device mainly for other purposes, it has extremely excellent features such as exhibiting multipurpose functions, and the practical effects after implementing the present invention are extremely large.

[Brief description of drawings]

FIG. 1 is a front view showing the entire apparatus.

FIG. 2 is a right side view of the same.

FIG. 3 is an enlarged cross-sectional view showing a rotary tube shaft portion.

FIG. 4 is a cross-sectional view taken along the line AA in “FIG. 3”.

FIG. 5 is a cross-sectional view taken along the line BB in “FIG. 3”.

FIG. 6 is a sectional view taken along line CC in FIG.

FIG. 7 is an enlarged cross-sectional view showing a rotating shaft portion.

[Explanation of symbols]

 1 can main body 2 can body 3 jacket 4 hot water / warm air distribution chamber 5 rotary pipe shaft 6 rotary shaft 9, 10 bearing device 11 drive gear 12 rotary drive motor 14 input / discharge port 16 exhaust communication pipe 18 filter device 21 additive water pipe 22 Additive liquid pipe 23, 24 Spraying air pipe 25 Additive powder pipe 26, 27 Needle valve air pipe 28 Nozzle pipe 29 Spray nozzle 30 Rotary joint 31 Air pipe 32 Hot water pipe 33 Air inlet pipe 34 Hot water supply / drain pipe

Claims (1)

[Scope of utility model registration request] 1. A double structure having a hot water / warm air circulation chamber formed by surrounding a jacket on the outer periphery of a can body having an opening / closing port provided with an airtight lid which can be opened and closed on one side. The can body is provided horizontally across the shaft body that is provided at both ends of the shaft core,
The structure is such that it is rotated by a rotary drive motor, and the warm air / warm water supply / drain pipes communicating with the hot air / warm water circulation chamber are communicated with the outside through a rotary joint provided on the shaft body, and inside the can body. A single or a plurality of feed pipes for adding a powdery or granular material or fluid having an inner end opened to the cavity are introduced through an exhaust communication pipe penetratingly formed in the shaft body, and the end of the exhaust communication pipe is externally vacuumed. A rotary vacuum dryer characterized by being connected to a device.