JPH0549892A - Solid-liquid agitator - Google Patents

Abstract

PURPOSE:To provide the solid-liquid agitator which uniformly agitates and mixes the liquid phase or solid and liquid phases in a container and can efficiently agitate and mix the solid phase. CONSTITUTION:This agitator is constituted by disposing a motor 5 for revolution and a motor 7 for rotation on the outside of the inverted circular conical container 1 and pivotally supporting a revolving shaft 2 which is disposed along the inner peripheral wall surface of the container 1 and has spiral vanes 3 to the front end of a hollow revolving shaft 4b extending radially from the upper part in the central part of the container at its front end in such a manner that this device can be revolved and rotated by the motors. A plane vane 9 which is revolved by the motor 5 for revolution is provided separately from the revolving shaft in the part upper than the sound phase boundary S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer, in which a substance dispersed in a liquid dispersion medium reacts to form a solid-liquid phase, a solid-liquid mixed phase is used as a raw material, or a dissolved liquid phase The present invention relates to improvement of a stirring device for the purpose of obtaining a finally dried powder by evaporating or filtering this dispersion medium when a solution that precipitates a solid phase upon evaporation is used as a raw material.

[0002]

When performing the above-mentioned treatments, the reaction of liquid phase or solid-liquid mixed phase and stirring treatment are carried out in a reaction tank or a stirring tank, respectively, and the resulting solid-liquid mixture is A general method is to obtain a powder by introducing it into an evaporative dryer or a filter. Further, in order to make this more efficient, it is conceivable to perform this with one device. Therefore, there is a known stirring device, that is, an inverted conical container 21 as shown in FIG.
It is possible to use a mixer (see Japanese Utility Model Laid-Open No. 63-98724) in which a rotating shaft 23 having spiral blades 22 arranged along the inner wall is rotated and revolved simultaneously by a rotation motor 24 and a revolution motor 25. Conceivable. However, this type of mixer is mainly suitable for mixing powder and granules, and even if it is used for stirring the liquid phase, a circulating flow does not occur and sufficient stirring cannot be performed, so the liquid in the container is mixed uniformly. No product of uniform quality can be obtained.

Further, as shown in FIG. 8, an inverted conical container 31
A mixer (see Japanese Utility Model Publication No. 50-15859) having a rotary shaft 32 having a spiral blade that revolves around the inner wall of a container and having a scraping plate 33 in contact with the inner wall of the container is known. There is. However, this mixer is only one in which a scraping plate is added to the configuration of the mixer, and the scraping plate 33 is merely for scraping off the substance adhering to the inner surface of the container 31, and mixing the liquid in the container. Although contributing to promotion, since the scraping plate 33 extends to the solid phase portion, a large amount of power and bending load are unnecessarily applied to the support member during mixing of the solid phase alone, which makes practical design difficult.

The present invention has been made in view of the above problems of the prior art, and its purpose is to uniformly stir and mix a liquid phase or a solid liquid phase in a container and effectively solid-phase it. Another object of the present invention is to provide a solid-liquid stirring device capable of stirring and mixing.

[0005]

In order to achieve the above object, the gist of the present invention is to arrange a revolution motor and a rotation motor on the outside of an inverted conical container, and arrange them along the inner peripheral wall surface of the container. An agitator in which a rotating shaft having spiral blades installed is pivotally supported at its upper end to the tip of a hollow revolving shaft extending in the radial direction from the upper part of the central part of the container so that the motor can revolve and rotate on its axis. A first aspect of the present invention is a solid-liquid agitator characterized in that a flat blade revolving by a diversion motor is provided in the upper part of the container separately from the rotary shaft. In the first aspect, the spiral blade and the flat blade impose a liquid phase. Alternatively, a solid-liquid agitator characterized in that a flat-plate blade is provided above the solid-phase interface so that the solid-liquid mixed phase is agitated and then the solid phase is agitated only by the spiral blade and a second invention. To do.

The height of the solid-phase interface is somewhat different depending on the type of raw material and reaction in the container, but it is often less than half the height of the liquid-phase interface. However, for example, a slide mechanism can be provided on the flat plate blade so that the length of the flat plate blade can be adjusted to accommodate various reactions.

[0007]

When the flat blade provided separately from the rotary shaft having the spiral blade revolves, a circulating flow over the entire container is generated when stirring the liquid phase or the solid-liquid mixed phase, and the liquid in the container is uniformly mixed. It In the subsequent solid-phase stirring, the material inside the container is carried to the upper part along the inner wall surface of the container by the rotation of the rotating shaft having the spiral blades, and at the end of the rotating shaft, it is scattered around by the rotational force (Fig. 2 (a)), and because the rotating shaft revolves along with the rotation, the material inside the container makes a horizontal circular motion (see Fig. 2 (b)), and the material inside the container is conveyed to the top by the spiral blade. Therefore, a space is created in the lower part of the container, and the material in the part where the spiral blades do not pass is dropped there (see Fig. 2 (c)), and mainly three-dimensional convective mixing as shown in Fig. 3 is performed. The efficient mixing is performed.

If the flat plate blade is installed above the solid-phase interface, the flat plate blade does not work during solid-phase agitation and only the spiral blade works, so that unnecessary power consumption does not occur, and unexpected large torque or lateral force is exerted. Since no load is generated, the equipment will not be damaged.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a partial vertical side view of a solid-liquid stirring device according to the present invention. In the figure, 1 is an inverted conical capacity 10
It is a closed container of 0 liter and is configured to uniformly stir and mix the liquid material or powder material in the container.

Reference numeral 2 denotes a rotary shaft having spiral blades 3 arranged from the lower part to the upper part along the inner wall of the container, and the rotary shaft 2 is horizontally arranged in the radial direction from a vertical hollow revolution shaft 4a in the upper part of the central part of the container. It is rotatably supported at the tip of the extending hollow revolution shaft 4b.

The revolving shaft 2 is revolved by revolving the revolving shaft 4b around the center of the container by a revolving motor 5 and a speed reducer 6 located outside the container. The rotation of the rotating shaft 2 is performed by connecting the rotating motor 7 and the reduction gear 8 outside the container to the rotating shaft 2 by a bevel gear system.

Reference numeral 9 denotes a flat plate blade provided separately from the rotary shaft 2, which is fixed to the lower part of the revolution shaft 4a and revolves around the center axis X of the container. As is apparent from the figure, the lower end of the flat plate blade 9 is above the solid phase interface S of this reaction. Also, L
Indicates a liquid phase interface.

Reference numeral 10 is a manhole for loading the material into the container, and 11 is an outlet for discharging the product in the container.

A test for obtaining a polymer powder was carried out by carrying out a polymerization reaction of a monomer by using such a solid-liquid agitator, and the contents will be described below.

First of all, the reaction is outlined. Polymerization reaction of the monomer is carried out in a solvent (cyclohexane) and, after passing through a gel state, a slurry in which a polymer is precipitated is obtained. From this slurry, the solvent is evaporated and dried to obtain a polymer. A powder is obtained.

As a raw material, a total of 76.3 kg of monomers 14.7 kg and cyclohexane 61.6 kg was used. The revolution speed is
The rotation speed was 4.4 rpm and the rotation speed was 140 rpm.

Then, a polymerization reaction was carried out according to the process conditions shown in Table 1 below.

[0019]

[Table 1]

After the test, 15.4 kg of polymer powder was taken out from the discharge port 11. The powder had a smooth and fluidity, an apparent specific gravity of 0.55, and a granulated sugar-like appearance. Met. When the inside of the manhole 10 was observed through the observation window during the liquid phase stirring, it was found that a circulating flow was generated throughout the container due to the action of the flat plate blade 9 rotating about the central axis X. Further, when the inside of the container was observed after discharging the polymer powder, almost no adhering substance was observed on the inner wall of the container. The required power of the revolution motor in this test was about 0.05 kW.

After this test, a flat plate blade whose length was approximately doubled was attached to the solid-liquid stirring apparatus shown in FIG. 1 and the same polymerization reaction test as above was carried out.
The flat blade was buried to a depth of 1/3, and abnormal vibration was observed on the shaft and the container when the powder was stirred. The required power in this case was about 0.1kW.

FIGS. 4 and 5 are views showing another embodiment of the solid-liquid stirring device of the present invention. FIG. 4 shows a case where the flat blade 12 is trapezoidal, and the flat blade 13 of FIG. The case where the center of the thing is cut out is shown. Even when the above-mentioned polymerization reaction was carried out using the solid-liquid stirring device having flat blades shown in FIGS. 4 and 5, the same dried granulated sugar-like polymer powder was obtained.

FIG. 6 (b) is a partial vertical sectional side view of the solid-liquid stirring device of the present invention incorporating a flat plate blade having a slide mechanism.
6A is a sectional view taken along line AA of FIG. In FIGS. 6 (a) and 6 (b), 14 is a flat blade supporting plate having two elongated holes 15, 16 is a flat blade, and the flat blade supporting plate 14 and the flat blade 16 have four sets of bolts.
17-Connected by tightening and fixing the nut 18,
To adjust the length of the flat blade 16, adjust the tightening position of the bolt 17 to the long hole 15
It can be done freely by changing along.

[0024]

Since the present invention is configured as described above, it has the following effects.

(1) By using the solid-liquid stirring device according to the present invention, a reaction for obtaining a solid phase from a liquid phase can be efficiently carried out by one device.

(2) A flat plate blade, which is separate from the spiral blade, is provided in the upper part of the container, and when the flat plate blade is rotated, a circulating flow is generated throughout the liquid in the container, resulting in sufficient mixing. , You can get the product of uniform quality.

(3) By providing the flat plate blade above the solid phase interface of the reaction for obtaining the solid phase from the liquid phase, the flat plate blade does not work during solid phase stirring, and only the spiral blade contributes to the stirring. Does not become excessive, and neither excessive torque nor lateral load is generated, which enables economical design.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional side view of a solid-liquid stirring device of the present invention.

[Fig. 2] Fig. 3 shows a state of powder stirring by the solid-liquid stirring device of the present invention
It is a figure explaining one operation.

FIG. 3 is a diagram for comprehensively explaining a powder stirring condition by the solid-liquid stirring device of the present invention.

FIG. 4 is a partially longitudinal side view of the solid-liquid stirring device of the present invention having a flat plate blade having a shape different from that of FIG.

FIG. 5 is a partial vertical cross-sectional side view of the solid-liquid stirring device of the present invention having a flat plate blade having a shape different from that of FIG.

6 (a) is a sectional view taken along line AA of FIG. 6 (b), and FIG. 6 (b).
FIG. 3 is a side view, partly in vertical section, of a solid-liquid stirring device of the present invention incorporating a flat plate blade having a slide mechanism.

FIG. 7 is a diagram showing a schematic configuration of a conventional stirring device.

FIG. 8 is a vertical sectional side view of another conventional stirring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container 2 ... Rotating shaft 3 ... Spiral blade 4a, 4b ... Revolution shaft 5 ... Revolution motor 7 ... Rotation motor 9, 12, 13, 16 ... Flat blade

Claims (2)

[Claims] 1. A revolving motor and a self-rotating motor are arranged on the outside of an inverted conical container, and a rotary shaft having spiral blades arranged along the inner peripheral wall surface of the container is provided with its upper end portion at the center of the container. In a stirrer pivotally supported at the tip of a hollow revolution shaft extending in the radial direction from the upper part so that it can be revolved and revolved by the motor, a flat plate blade revolved by the revolving motor is provided on the upper part of the container separately from the rotating shaft. A solid-liquid agitator characterized by being provided. 2. The flat blade is provided above the solid-phase interface so that the liquid phase or the solid-liquid mixed phase is stirred by the spiral blade and the flat blade, and then the solid phase is stirred only by the spiral blade. The solid-liquid stirring device according to claim 1.