JPH05234A - Apparatus for mixing powder into liquid - Google Patents

Abstract

PURPOSE:To prevent the generation of an undissolved lump or lumpy matter by uniformly dispersing a powder in a liquid. CONSTITUTION:The powder introduced into a powder receiving part 14 from the receiving port 18 of a hopper 12 is sucked downwardly by the ejector effect generated when the liquid injected from a first liquid jet orifice 24 passes through the throttled part 22 of a discharge pipe 16 and mixed with the liquid to be uniformly dispersed therein. Since the powder ready to adhere to the inner peripheral surface of the powder receiving part 14 is washed off by the revolving stream injected from a second jet orifice 30, the powder is carried to the lower discharge pipe 16 without adhering to the wall of the hopper 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously mixing powder in a liquid to uniformly disperse the powder.

[0002]

2. Description of the Related Art For example, in the ion exchange step of synthetic zeolite, zeolite powder as a raw material is mixed with an ammonium sulfate aqueous solution to exchange cations. In this case, if the raw material powder is directly added to the container containing the ammonium sulfate aqueous solution, the powder will be scattered around and the powder will be sprinkled in the mixed solution, so that a uniform dispersion cannot be obtained. ..

As a device for continuously mixing powder in a liquid, a rotary disk type mixing device as shown in FIG. 2 has been conventionally known. The device is a thin film of liquid that flows down from the upper edge of the overflow cone 50 provided inside the device along the inner wall of the cone 50, while supplying powder from the upper inlet 52 of the device. Rotating deployment cone 5
The centrifugal force of 4 disperses the powder in the overflow cone 50. In this way, after the powder merges with the flowing liquid, it passes over the rotating disk 56 provided at the lower part of the overflow cone 50, and the pin 5 planted on the disk 56.
The powder and the liquid are stirred and mixed under the shearing action of No. 8.

[0004]

However, even if the above-mentioned mixing apparatus is used, the generation of powder is inevitable, and
Since the powder adheres to the wall of the vessel to form a lump, a uniform dispersion cannot be obtained. Further, a part of the powder may be scattered to the outside from the powder introduction port 52, and dust may be scattered around the device.

The present invention is intended to solve the above problems, and an object thereof is to provide an apparatus capable of continuously mixing powders in a liquid to uniformly disperse the powders. is there.

[0006]

The device for mixing powder in a liquid according to the present invention comprises a funnel-shaped powder receiving part having a powder receiving port at the top and a lower discharge pipe. In the hopper, a throttle portion is formed in the discharge pipe, and a first liquid jet port is opened near the upper portion of the throttle portion toward the throttle portion,
The problem is solved by opening the second liquid ejection port on the inner peripheral surface of the upper portion of the powder receiving portion.

[0007]

The powder introduced from the inlet of the hopper into the powder receiving portion is sucked downward by the ejector effect generated when the liquid ejected from the first liquid jet passes through the throttle of the discharge pipe. Then, it is mixed with the liquid and uniformly dispersed. Further, since the powder that tends to adhere to the inner peripheral surface of the powder receiving portion is washed away by the swirling flow injected from the second liquid ejection port, it is carried to the lower discharge pipe without adhering to the vessel wall of the hopper. ..

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional side view of an apparatus for mixing powder in a liquid according to the present invention. A hopper 12 which is a main component of a mixing apparatus 10 includes a funnel-shaped powder receiving section 14 and a receiving section 14. The discharge pipe 16 is formed by extending the lower part downward. A powder receiving port 18 is provided on the top of the powder receiving unit 14, and a small gap is left on the outer peripheral portion of the receiving port 18 to prevent the liquid described later from scattering. A cover 20 is provided.

A narrowed portion 22 is formed in the discharge pipe 16, and a first liquid ejection port 24 is opened toward the narrowed portion 22 in the discharge pipe 16 and near the upper portion of the narrowed portion 22. For the throttle ratio of the throttle portion 22 and the diameter of the first liquid ejection port 24, optimum dimensions are selected according to the type of powder mixed in the liquid and the flow rate and concentration of the mixed liquid.

Liquid line 2 leading to the first liquid outlet 24
The line 28 is branched from 6 and the second liquid ejection port 3 is provided on the inner peripheral surface of the upper portion of the powder receiving portion 14 in the tangential direction thereof.
Open 0. The diameter of the second liquid ejection port 30 is narrower than the pipe diameter of the branch line 28, if necessary. A flow rate controller may be provided in the middle of the branch line 28 to control the flow rate of the injection liquid.

FIG. 3 is a flow chart showing the mixing process when the mixing device 10 is used in the ion exchange process of synthetic zeolite. Zeolite powder, which is the raw material,
It is introduced into the bag filter 40 and is quantitatively and continuously supplied to the mixing device 10 via the rotary valve 42. The suspension mixed with the ammonium sulfate aqueous solution from the liquid line 26 in the mixing device 10 is sent to the stirring tank 44 and uniformly dispersed, and then sent to the next step. To the liquid line 26 of the mixing apparatus 10, the dispersion liquid in the stirring tank 44 is circulated and supplied together with the ammonium sulfate aqueous solution.

Next, the operation of the mixing apparatus 10 will be described. The zeolite powder is introduced into the powder receiving portion 14 of the hopper 12 from the receiving port 18. In addition, the liquid line 26
An ammonium sulfate aqueous solution is supplied from, and the aqueous solution is ejected from the first liquid ejection port 24. Then, the discharge pipe 16
Due to the ejector effect in the throttle section 22, the upstream side of the throttle section 22 is in a reduced pressure state. As a result, the receiving unit 14
The powder inside is sucked downward, mixed with an ammonium sulfate aqueous solution, uniformly dispersed, and flows down to the stirring tank 44.

As for the powder that is about to adhere to the inner peripheral surface of the powder receiving portion 14, the ammonium sulfate aqueous solution injected from the second liquid ejection port 30 flows in the inner peripheral surface in a swirling flow.
It is washed away and carried to the lower discharge pipe 16 without adhering to the vessel wall. Since the inside of the powder receiving portion 14 is in a depressurized state, the powder does not scatter out of the hopper 12.

This mixing device is particularly suitable for the above-mentioned zeolite ion exchange step, as well as the operation of mixing and dispersing kaolin powder in an aqueous solution of silicic acid. However, there are no particular restrictions on the types of powder and liquid supplied into the device.

[0015]

By using the mixing apparatus of the present invention, the powder can be continuously mixed in the liquid, and the powder can be uniformly dispersed in the liquid. That is, since no powdering occurs in the mixed liquid and no powder adheres to the vessel wall, there is an excellent effect that a uniform dispersion liquid can be obtained.

Further, since the inside of the apparatus is in a depressurized state during driving, a part of the powder does not scatter to the outside and dust is not scattered around. Further, since a driving device such as an electric motor is not used, problems such as blockage and bite, which are peculiar to powder operation, do not occur, and maintenance is easy.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an apparatus for mixing powder into a liquid according to the present invention.

FIG. 2 is a vertical cross-sectional side view showing a conventional rotating disk type mixing device.

FIG. 3 is a partial flowchart when the mixing device 10 is used in an ion exchange process of synthetic zeolite.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mixing device 12 Hopper 14 Powder receiving part 16 Discharge pipe 18 Powder receiving port 22 Throttling part 24 1st liquid ejection port 30 2nd liquid ejection port

Claims (1)

Claim: What is claimed is: 1. A hopper comprising a funnel-shaped powder receiving portion having a powder receiving port at the top and a lower discharge pipe, wherein a discharge portion is formed in the discharge pipe, and the same throttle portion is formed. A first liquid ejection port is opened in the vicinity of the upper portion of the powder toward the narrowed portion, and a second liquid ejection port is opened on the inner peripheral surface of the upper portion of the powder receiving portion. Device for mixing.