JPS63302285A - Drier for powder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a powder drying device.

In the food, pharmaceutical, resin, and new materials industries that handle powder, it is common practice to dry the powder. It is requested that the following be obtained. Particularly in the recent era of diversified high-tech products, such demands are becoming stronger in each specific drying situation.

The present invention relates to a powder drying apparatus that meets the above requirements.

<Prior art and its problems> Conventionally, various types of drying equipment for powder, such as a static type, a rotating type, an air flow type, a 4IJl stirring type, a spray type, and a fluidized bed type, have been used to dry powder. It is used selectively depending on the drying purpose, etc. Each of these conventional devices has its own merits, but on the other hand, the stationary type conventional devices have the problem of long drying times, and the rotary, air flow, and agitation types conventional devices There is a lot of fine dust,
In some cases, the powder may be broken or cut.Furthermore, conventional spray-type equipment has the problem of being too large, including its ancillary equipment, and conventional fluidized-bed equipment has the problem of being too large. However, especially when the powder is a fine powder of about 30 cycles or less, it is difficult to stably fluidize the powder, and therefore it is difficult to put it into practical use.

<Problems to be Solved by the Invention and Means for Solving the Problems> The present invention provides a new drying device that solves the conventional problems as described above.

Therefore, the present invention provides a system in which a closed vertical container equipped with a vibration generation source and a main heating source is supported by an elastic body such as a spring so as to give a certain kind of free movement to the closed vertical container. A gas discharge port is provided above the raw material supply port and the height of the fluidized bed for the powder to be formed, and a product discharge port is provided within the fluidized bed height, and a gas dispersion material is installed below the product discharge port. Furthermore, a gas inlet passage equipped with a sub-heating source is piped below the gas dispersion material, and the vibration generation source and the main heating source are activated to vibrate and heat the closed vertical container. On the other hand, by activating the auxiliary heating source and blowing heated gas into the closed vertical container from the gas supply path through the gas dispersion material, the powder supplied from the raw material supply port is fluidized and kept in a heated atmosphere. The present invention relates to a powder drying device configured to dry powder.

The important point in the present invention is that even if the powder is a fine powder with a size of several ILm to several tens of ILm, which is said to be impossible to fluidize with a conventional fluidized bed device, a certain kind of free movement is imparted to the powder. By applying vibration and at the same time blowing a dispersion gas into the powder from below, the powder forms a stable fluidized bed, almost like a liquid, with little bubbling or slugging. The second step is to achieve homogeneous drying of the powder in a heated atmosphere within the fluidized bed.

Hereinafter, the configuration of the present invention will be explained in more detail based on the drawings.

<Embodiment> FIG. 1 is an overall view, partially in section, of an embodiment of the present invention. A cylindrical closed vertical container 11 is erected on a mounting frame 12, and a vibration motor 13 The mounting frame 1 equipped with
2 is supported by a base 15 with springs 14a and 14b. The closed vertical container 11 is provided with a gas outlet 21, raw material supply ports 22a, 22b, and a product outlet 23 in this order from the top to the bottom, and a heating medium is provided as a main heating source on the side circumferential surface thereof. A gas dispersion material 41 is installed below the product discharge port 23, and a heater 51 is provided as an auxiliary heat source further below the gas dispersion material 41. 61 is piped. In this case, gas dispersion.

The material 41 is divided into two parts, a gas dispersion material 41a at the center and a gas dispersion material 41b at the periphery. and the amount can be controlled by the heater 51 and the associated compressor 71 and valves 81a, 81b, 81c. In both cases, due to the height of the fluidized bed of powder A, which will be described later,
1 is located above the fluidized bed height, and the product discharge [ ] 23 is located within the fluidized bed height.

The vibration motor 13 is operated to vibrate the closed vertical container 11, and therefore the gas dispersion material 41 is also vibrated, and gas is further introduced into the closed vertical container 11 from the gas supply path 61 via the gas dispersion material 41. When the powder A is blown into the closed vertical container 11, it forms a stable fluidized bed as if it were a liquid. It is configured to dry quickly.

FIG. 2 is an overall view, partially in section, of another embodiment of the present invention. A vibration motor 18 is installed at the bottom and end of a cylindrical closed vertical container 16 whose lower part is narrowed into an inverted conical shape, and the closed vertical container 16 is erected on a mounting frame 17. 17 is a base 20 with springs 19a and 19b.
is supported by The closed vertical container 16 has a gas discharge port 24, a fine powder return port 25, a raw material supply port 26, and a product discharge port 27 opened in this order from the top to the bottom, and the side circumferential surface of the container 16 is heated as a main heating source. A gas dispersion material 42 is installed below the product discharge port 27, and a blower 72 and a valve 82a are attached below the gas dispersion material 42 to provide a sub-assembly. A gas inlet passage 62 equipped with a heater 52 as a heat source is provided.

As in the case of FIG. 1, the gas outlet 24 opened above the height of the fluidized bed of the powder B fluidized in the heated atmosphere is connected to the dust collector 91, and the gas outlet 24 is connected to the dust collector 91. After collecting the fine particles scattered along with the gas in the dust collector 91,
The fine powder is returned to the fine powder return port 25 via the valve 82b, and the raw material supply port 26 is connected to the raw material storage container 92 via the screw feeder 92a.
Powder B in 2 is continuously fed in a fixed amount to the raw material supply port 26 by the screw feeder 92a, and the product discharge port 27 is inserted into the fluidized bed height of the powder B from the outside of the closed vertical container 16. A dust collector 93 and a valve 82c are installed at the tip of the pipe to collect the product homogeneously dried in the fluidized bed height.
It is designed to be collected through.

Needless to say, the illustrated embodiment is a preferred example of the present invention, and the present invention is not limited to this embodiment. Although not shown in the drawings, the vibration generation source represented by a vibration motor, the number of elastic bodies represented by springs, the heating means represented by jackets and coils, and heaters, etc. They are appropriately selected depending on the shape and size of the mold container, the purpose of drying, etc., and can be used in combination as appropriate. Further, as the gas dispersion material, punching metal, sintered metal, unglazed metal, filter cloth, etc. having an open diameter of 1-1 mm can be used as appropriate depending on the properties of the powder and the purpose of drying. For this reason, the gas blown into the closed vertical container can be an inert gas, or the inside of the closed vertical container can be operated under pressurized or reduced pressure.

Functions> Next, the functions of the present invention will be explained with reference to a specific usage state of the embodiment shown in Fig. f51. Diameter 300 +wm x height 6
00mm sealed vertical container 11, average particle size 1OJL
Synthetic resin powder with a+, Shinhi Kai 0.8g/mJl, Kahitun 0.2g/■bun, and moisture content 1O% is fed to the raw material supply ports 22a, 2
Gas dispersion material 41 supplied from 2b to height 200■■
Both a and 41b are porous metal plates with an average opening diameter of 5 mm. By operating the vibration motor 13, the closed vertical container 1
1 is subjected to diagonal upward vibration with a total amplitude of 1.5 sm and a frequency of 100 H2, and at the same time, steam at 80°C is passed through the jacket 31, and dehumidified air heated to 80°C by the heater 51 is passed through the gas dispersion material 41a. 12 views/min, gas dispersion material 4
1b at a rate of 81/min. At the beginning of drying, the powder surface swelled into a planar shape, forming a fluidized bed with little bubbling or slugging, and clear stirring or swirling movement was observed within the fluidized bed. Countless small bubbles were generated from the surface of the powder. The formation of such a fluidized bed becomes more stable as the drying progresses, and at the final stage of drying, the fluidized bed appears as if it were a liquid, and the height of the bed is approximately 1.5 times higher than before the start of operation. It was so exciting. After running for 30 minutes, the product recovered from the product outlet 23 had a moisture content of 0.01% or less, and its properties were extremely good.

<Effects of the Invention> As explained above, the present invention has the following advantages: By fluidizing the powder by the synergistic effect of mechanical vibration and gas blowing, the powder can be reduced to several tens of fiLm to several dots. Even with the following fine powders, a homogeneous dried product can be obtained in a short time with a relatively small amount of blown gas, and there is an excellent effect that the powder does not break or break during drying.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are overall views, partially in cross section, of different embodiments of the unreleased II. 11.16... Closed vertical container 12.17... Mounting frame, 13.18... Vibration motor 14
a, i4b, 19a, 19b・-Spring 15.20
-・Base, 21.24・・Gas outlet 22a, 22b,
26...Raw energy 4 supply port 23.27...Product discharge [] 31.32...Jacket 41a, 41b, 42-gas dispersion material 51.52...Heater, 61.62...Gas feed path 81
a~81C982a~82C...Valve 91.93...
Dust collector, A, B... Powder patent applicant Chuo Kakoki Co., Ltd. Agent Patent attorney Hiroshi Iriyama Figure 1, page 3, page 9

Claims (1)

[Claims] 1. A closed vertical container equipped with a vibration generation source and a main heating source is supported by an elastic body such as a spring so as to give a certain kind of free movement, and the closed vertical container is equipped with a vibration generating source and a main heating source. The container has a raw material supply port, a gas discharge port above the height of the fluidized bed of powder to be formed, and a product discharge port within the fluidized bed height, and a gas dispersion material is installed below the product discharge port. has been,
Furthermore, a gas supply path equipped with a sub-heating source is installed below the gas dispersion material, and the vibration generating source and the main heating source function to vibrate and heat the closed vertical container. By activating the heating source and blowing heated gas into the closed vertical container from the gas supply path through the gas dispersion material, the powder supplied from the raw material supply port is fluidized and dried in a heated atmosphere. A powder drying device consisting of: 2. The powder drying apparatus according to claim 1, wherein the main heating source is a jacket or a heater provided around a closed vertical container. 3. The powder drying apparatus according to claim 1, wherein the main heating source is a coil or heater housed in a closed vertical container. 4. The powder drying apparatus according to any one of claims 1 to 3, wherein the closed vertical container is narrower at the bottom than at the top. 5. The powder drying apparatus according to any one of claims 1 to 4, wherein a dust collector is connected to the gas outlet. 6. The powder drying apparatus according to any one of claims 1 to 5, wherein the gas dispersion material is divided into two parts. 7. The powder drying apparatus according to any one of claims 1 to 6, wherein the closed vertical container is operated under reduced pressure or increased pressure.