JPS6343127B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method and apparatus for humidifying powder that is continuously supplied in a fixed amount, and in particular to a humidifying device for humidifying powder that is continuously supplied in a fixed amount. The present invention relates to a continuous mixing method capable of uniformly humidifying powder by uniformly dispersing and mixing it, and an apparatus therefor.

(Prior Art) It is easy to understand that the smaller the amount of liquid to be supplied when humidifying powder, the more difficult it is to humidify it uniformly.

We first developed a mixing device (Japanese Patent Publication No. 48-22511) that uniformly humidifies the liquid by causing the liquid to flow down in the form of an annular liquid film and colliding with powder that is continuously supplied in a fixed amount. ) and a device that further improved this device to be able to quantitatively supply even a small amount of liquid and uniformly disperse and humidify it (Japanese Patent Publication No. 53-38828, Japanese Patent Publication No. 57-9844) Publication No.) etc. were proposed.

However, in these devices, the liquid flows down in an annular liquid film shape in an overflow format, so it is suitable when the amount of liquid for humidification is large to a certain extent, and it is possible to humidify evenly with a smaller amount of liquid. If necessary, uniformly distributed humidification is not possible with this device.

(Object of the Invention) The object of the present invention is to provide a continuous mixing method that can uniformly humidify even a very small amount of liquid to powder that is continuously and quantitatively supplied. The objective is to provide a device for this purpose.

(Structure of the Invention) The continuous mixing method for uniformly humidifying powder with a small amount of liquid according to the present invention is based on a continuous mixing method for uniformly humidifying powder with a small amount of liquid. A plurality of injection nozzles 4,
A small amount of liquid is spouted from the rotary mixing plate 3.
a plurality of upper surface scrapers arranged to cross the injection nozzle opening and scrape off powder that may adhere to the inner wall surface of the base 2 as the rotary mixing disk rotates; 5 and a side scraper 7 provided on the rotating mixing board 3 and rotating along the inner wall of the mixing chamber, the powder is stirred and mixed, and the powder is uniformly moistened with a small amount of liquid.

Therefore, the powder supplied to the rotating mixing board 3 is scattered in the form of a powder mist (primary particle state), and the liquid is supplied in the form of a spray to this powder, which is uniformly stirred and mixed by the top scraper 5 and the side scraper 7. This allows the powder to be uniformly moistened.

Further, the continuous mixing device according to the present invention for uniformly humidifying powder with a small amount of liquid includes a rotary mixing board 3 rotatably disposed in a mixing chamber 1 covered with a base 2, A plurality of injection nozzles 4, 4 for ejecting liquid to the powder that is continuously supplied to the disk 3 in a fixed amount; A plurality of upper surface scrapers 5 are arranged to cross the injection nozzle opening and scrape off powder that may adhere to the inner wall surface of the base 2, and a plurality of upper surface scrapers 5 are provided on the rotary mixing board 3 to mix the powder. It is characterized by being equipped with a side scraper 7 that scrapes and rotates along the inner wall of the chamber.

(Example) An example of a continuous mixing method for uniformly humidifying powder and an apparatus therefor according to the present invention will be described based on the drawings.

A cylindrical part 8a and a conical part 8b connected to the lower part of the cylindrical part 8a
A mixing chamber 1 is formed inside a main body body 8 consisting of a base 2 having a circular hole 2a in the center.
The conical part 8b is covered with a powder discharge port 9 formed on one side of the conical part 8b. Mixing chamber 1
A rotating mixing disk 3 is disposed inside the mixing disk 3, in which a shaft 11 is rotatably supported by a bearing portion 12, and is configured to rotate at high speed by being directly connected to a V-pulley 13 or other drive device. 10 is, for example, a powder supply cylinder that is connected to the outlet side of a powder continuous quantitative supply device (not shown) that we have developed;
From here, the powder is continuously and quantitatively supplied to the center of the rotary mixing disk 3. A plurality of injection nozzles 4, 4 for ejecting liquid onto the powder are symmetrically arranged on the base 2, and the nozzle ports 4a face into the mixing chamber 1. The rotating mixing board 3 has a plurality of upper surfaces arranged so as to cross the injection nozzle port 4a as the rotating mixing board rotates, and to scrape off powder that may adhere to the inner wall surface of the base 2. In the embodiment, three scrapers 5 are installed radially at the same circumferential angle. A plurality of side scrapers 7, three in this embodiment, are attached radially around the circumferential side of the rotary mixing disk 3 so as to scrape and rotate along the inner wall of the mixing chamber. A large number of mixing pins 6 are uniformly arranged and project from the upper surface of the rotating mixing plate 3, and the mixing pins 6 are used depending on the purpose.

Reference numeral 14 denotes a bottom member having a conical portion 14a, which is disposed below the conical portion 8b, so that the bottom of the mixing chamber 1 is formed into a valley shape by the conical portions 8b and 14a. Reference numeral 15 denotes a discharge blade attached to the lower surface of the rotary mixing plate 3, and the shape of the lower end corresponds to the trough-shaped bottom of the mixing chamber 1. Reference numeral 16 denotes an overflow cone attached to the center of the upper surface of the base 2, to which liquid for cleaning the inside of the mixing chamber 1 is supplied, and the liquid supplied from the pipe 17 is supplied to the liquid chamber 18. The overflowing liquid flows down along the inverted conical overflow tube 19 and is scattered by the rotating mixing disk 3.

Next, the continuous mixing method of the present invention will be explained with an example of the operation of the apparatus. It is pressed and expanded into a thin film. A small amount of liquid is sprayed into the mixing chamber 1 from the injection nozzles 4, 4 arranged symmetrically against this powder, but the rotating mixing plate 3 has an upper surface scraper 5 and a side surface scraper 5. Since the scraper 7 is provided, the atomized liquid is uniformly dispersed and mixed into the powder spread in a thin film due to these stirring effects and the upper surface scraper 5 crossing the nozzle port 4a, and a predetermined moisture content is achieved. can be given. The moistened powder is discharged from the discharge port 9 by the discharge blades 15.

(Effects of the Invention) According to the continuous mixing method for uniformly humidifying powder according to the present invention, the powder that is quantitatively and continuously supplied from the powder supply cylinder is rotated in the mixing chamber 1. The powder is scattered by the mixing plate 3 and developed in a thin film state, and a small amount of liquid is sprayed into the mixing chamber 1 from the symmetrically arranged injection nozzles 4, 4. However, since the rotating mixing board 3 is provided with a top scraper 5 and a side scraper 7, the agitation effect of these and the passage of the top scraper 5 across the nozzle port 4a cause atomized liquid to be applied to the powder in a thin film state. It can be uniformly dispersed and mixed to provide a predetermined level of moisture.

Therefore, it has traditionally been difficult to uniformly humidify powder with a small amount of liquid, but with the method of the present invention, powder can be humidified continuously and uniformly even with a small amount of liquid. It is possible to humidify the powder and obtain a powder with a predetermined humidity. Further, according to the present invention, an apparatus for carrying out such a method can be realized with a simple configuration.

[Brief explanation of the drawing]

The drawings illustrate an apparatus for carrying out the continuous mixing method for uniformly humidifying powder according to the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a side view, and Fig. 3 is a longitudinal sectional view. 4 is a plan view with the base removed, and FIG. 4 is a plan view of the entire device. 1: Mixing chamber, 2: Base, 3: Rotating mixing board, 4:
Injection nozzle, 5: top scraper, 6: mixing pin, 7: side scraper.

Claims (1)

[Scope of Claims] 1. A small amount of liquid is supplied from a plurality of injection nozzles 4, 4 to powder that is continuously and quantitatively supplied to a rotating mixing board 3 rotating in a mixing chamber 1 covered with a base 2. A plurality of upper surface scrapers 5 are provided on the rotary mixing disk 3 and arranged to cross the injection nozzle opening as the rotating mixing disk rotates. A continuous mixing method characterized in that the powder is stirred and mixed by a side scraper 7 that rotates along the inner wall of the mixing chamber, and the powder is uniformly moistened even with a small amount of liquid. 2. A rotary mixing disk 3 rotatably arranged in a mixing chamber 1 covered with a base 2, and a plurality of rotary mixing disks 3 for ejecting liquid to the powder that is continuously supplied in a fixed amount to the rotating mixing disk 3. Injection nozzles 4, 4, a plurality of upper surface scrapers 5 provided on the rotating mixing disk 3 and arranged so as to cross the injection nozzle opening as the rotating mixing disk rotates, and the rotating mixing disk 3.
and a side scraper 7 which is provided in the mixing chamber and rotates along the inner wall of the mixing chamber.The powder is configured to be able to uniformly humidify even a small amount of liquid. Continuous mixing equipment.