JPS6351055B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a powder fluid and a reaction liquid, in which a first liquid and a second liquid of a reaction system are mixed with a powder fluid that is continuously and quantitatively supplied. It relates to a method of continuous mixing with a second liquid, and in particular a method that can uniformly and continuously mix materials that rapidly react and solidify when mixed with a second liquid, making them difficult to discharge. be.

(Prior art) Traditionally, food production, toner production for dry copiers, fluidized fuel production such as coal and oil coke,
In other fields, it may be necessary to uniformly mix multiple types of powder fluids, and in this case, how to uniformly mix the continuously supplied powder fluids is an extremely important and extremely difficult problem. There is also.

We have previously proposed the most suitable uniform continuous mixing method and the most suitable equipment for its implementation in order to meet the above-mentioned demands (for example, Japanese Patent Publication No. 48-22511,
(Japanese Patent Publication No. 53-38828, Japanese Patent Publication No. 57-9844, etc.), these methods and devices allow the liquid to flow down as an annular overflow membrane, and the powder that is continuously supplied in a fixed amount to this is expanded and collided. At the same time, the mixture was mixed using a rotating mixing board.

However, depending on the powder/fluid material or the liquid to be mixed, this method and apparatus may not be possible. For example, if there are multiple types of liquids to be mixed with the powder, and one of these liquids is a reactive type that reacts with the powder material or other liquids, it may be necessary to supply them in a different order or at the same time. There are cases in which a reaction occurs immediately after supplying the liquid, making it difficult to discharge it, and cases in which the liquid in the reaction system must be small in amount and cannot be allowed to flow down as an annular overflow membrane. Even in such cases, it is necessary to uniformly mix the liquid with the continuously supplied powder fluid, but conventionally there is no mixing method or device suitable for this purpose.

(Objective of the Invention) The object of the present invention is to meet the above-mentioned demands, and to provide uniform and continuous supply of powdered fluids of multiple types, even if some of the liquids are reactive. It is an object of the present invention to provide a continuous mixing method that enables mixing and accurate discharge of the mixed materials.

(Structure of the Invention) The continuous mixing method of a powder fluid and a reaction liquid etc. according to the present invention is a continuous mixing method in which a first liquid and a second liquid of a reaction system are mixed with a continuously supplied powder fluid. This method involves overflowing from an overflow cone 16 to a powder fluid that is continuously supplied in a constant quantity from a supply cylinder 10 and scattered and expanded by a rotary mixing board 3 rotating in a mixing chamber 1 covered with a base 2. The first thing to flow
The second liquid of the reaction system is caused to flow down as an annular overflow film, and the second liquid of the reaction system is ejected in the form of a spray from the plurality of injection nozzles 4, 4. The spouted second liquid is scattered by a plurality of upper surface scrapers 5 arranged so as to cross the jet nozzle opening and to scrape off the liquid powder that may adhere to the inner wall surface of the base 2. In this method, the mixture is stirred and mixed by this top scraper 5 and a side scraper 7 provided on the rotary mixing board 3 and rotating along the inner wall of the mixing chamber, and then discharged from the discharge port 9.

(Example) A continuous mixing method of a powder fluid, a reaction liquid, etc. according to the present invention will be explained based on the drawings together with an apparatus used for carrying out the method.

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 portion 8b is covered with a discharge port 9 formed on one side of the conical portion 8b. Disposed within the mixing chamber 1 is a rotating mixing disk 3 in which a shaft 11 is rotatably supported by a bearing 12 and is configured to rotate at high speed by being directly connected to a V-pulley 13 or other drive device. 10 is a supply cylinder that is connected to the outlet side of a continuous quantitative supply device (not shown) for powder etc. that we have developed;
The powder fluid is continuously supplied in a fixed amount from here to the center of the rotating mixing disk 3, and is scattered and expanded by the rotating mixing disk 3. Reference numeral 16 denotes an overflow cone for supplying a non-reactive first liquid to the powder fluid to be scattered and expanded.
The liquid reaches the inside of the liquid chamber 18, and the overflowing liquid flows down as an annular overflow film along the inverted cone-shaped overflow tube 19, colliding with the powder fluid scattered and expanded by the rotating mixing disk 3. to mix evenly. This overflow cone 16 is
Of course, as shown in Japanese Patent No. 57-9844, a plurality of stages may be provided so that a plurality of types of first liquids can be supplied and mixed.

A plurality of injection nozzles 4, 4 for spraying and mixing the second liquid of the reaction system into the homogeneous mixture thus mixed are arranged symmetrically on the base 2, and the nozzle opening 4a is connected to the mixing chamber. It is coming within 1.
The rotary mixing disk 3 has a plurality of upper surfaces arranged so as to cross the injection nozzle port 4a as the rotating mixing disk rotates, and to scrape off liquid 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. Three side scrapers 7 are radially attached to 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 protruded from the upper surface of the rotary mixing board 3 in an evenly spaced state, and are used depending on the purpose. Note that 14 is a bottom member having a conical portion 14a, which is connected to the conical portion 8.
b, and 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.

Next, the continuous mixing method of the present invention will be explained with an example of the operation of the device.The powder fluid, for example, powder, which is quantitatively and continuously supplied from the supply cylinder 10, is fed to a rotary mixing plate rotating at high speed in the mixing chamber 1. It is scattered and expanded by 3. The first liquid flows down from the overflow tube 19 of the overflow cone 16 in the form of an annular overflow membrane and collides with the powder fluid, thereby becoming a uniformly mixed fluid. The second liquid of the reaction system is sprayed from the symmetrically arranged injection nozzles 4 and 4 into the mixing chamber 1.
However, since the rotating mixing board 3 is provided with a top scraper 5 and a side scraper 7, the stirring effect of these and the passage of the top scraper 5 across the nozzle port 4a result in spraying into the uniform mixed fluid. The second liquid is uniformly dispersed and mixed. In this way, the second liquid in the reaction system is uniformly mixed in the final stage, so it can be removed from the discharge vane 15 before it becomes difficult to discharge, or even if the material is difficult to discharge.
can be easily discharged from the discharge port 9.

(Effects of the Invention) According to the method for continuously mixing a powder fluid and a reaction liquid etc. according to the present invention, the powder fluid that is quantitatively and continuously supplied from the supply cylinder is scattered and expanded by the rotating mixing board 3, and the powder fluid is The first liquid flows down as an annular overflow film, and the second liquid of the reaction system is injected into the mixing chamber 1 as a spray from the injection nozzles 4, 4, and the rotating mixing disk 3 Due to the stirring effect of the top scraper 5 and side scraper 7 provided at the top and the passage of the top scraper 5 across the nozzle port 4a, a second
The liquid can be dispersed and developed in the form of a spray, thereby making it possible to uniformly disperse and mix the liquid. Therefore, even if the second liquid is a reaction system liquid, it can be properly discharged from the outlet before the reaction, and even if the second liquid is a small amount, it can be accurately and uniformly discharged. Can be mixed.

In this way, it is possible to mix multiple types of liquids with the powder fluid, and by mixing the second liquid, even materials that react and solidify and are difficult to discharge can be accurately and uniformly mixed. It can be mixed and discharged, making it ideal for processing powder and fluids.

[Brief explanation of drawings]

The drawings illustrate an apparatus for carrying out the continuous mixing method of powder fluid, reaction liquid, etc. 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 side view. FIG. 4 is a plan view of the entire device with the base removed. 1: Mixing chamber, 2: Base, 3: Rotating mixing board, 4:
Injection nozzle, 5: Top scraper, 6: Mixing pin, 7: Side scraper, 10: Supply cylinder, 16:
Overflow cone, 19: Overflow tube.

Claims (1)

[Claims] 1. A continuous mixing method in which a first liquid and a second liquid of a reaction system are mixed with a powder fluid that is continuously supplied, the method comprising: , base 2
The first liquid overflowing from the overflow cone 16 is caused to flow down as an annular overflow film, and a plurality of jets are ejected to the powder fluid that is scattered and expanded by the rotating mixing board 3 that is rotating in the mixing chamber 1 covered with The second liquid of the reaction system is ejected in the form of a spray from the nozzles 4, 4, and the second liquid of the reaction system is ejected from the nozzles 4, 4 so as to cross the injection nozzle opening provided in the rotating mixing disk 3 as the rotating mixing disk rotates. The spouting second liquid is scattered by a plurality of upper surface scrapers 5 arranged so as to scrape off the liquid powder that may adhere to the inner wall surface of the base 2. stirring and mixing with a side scraper 7 rotating along the inner wall of the mixing chamber;
A method for continuously mixing a liquid powder, a reaction liquid, etc., characterized in that the liquid powder is discharged from a discharge port 9.