JP2001070776A - Agitating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a heating medium heated by a heating medium feeder from outside a container flow inside a hollow section, increase the heat transfer area per charge volume and shorten the heating time for a treatment liquid by using a hollow member as a member continuously wound into the spiral shape at the narrow winding pitch and constituting an agitating element. SOLUTION: An agitating element 9 of a double spiral structure is constituted of an oblong or a cylindrical container of tapered shape set horizontally and having the different inner diameter of both ends, a member 8 having the outer diameter smaller than the inner diameter of the container and continuously wound into the spiral shape in the longitudinal direction in the container and a plurality of members discontinuously wound into the spiral shape at the winding pitch wider than that of the first spiral shape member 8 while keeping a very small clearance between the agitating element and the container wall face on the outer periphery of the member 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a batch system used in a reaction system in which a reverse reaction is suppressed and a forward reaction is promoted by causing a chemical reaction by stirring and mixing and discharging a reaction by-product to the outside of the system. The present invention relates to a stirring device.

[0002]

2. Description of the Related Art Conventionally, as a batch-type stirring device for stirring and mixing, a stirring device having a stirring blade such as a helical ribbon blade in a vertical cylindrical container has been used. Japanese Patent Application Laid-Open No. 2-262524 is an example of this kind of related technology.

[0003]

In the conventional stirring apparatus, when the processing amount per batch increases, there are the following problems in scaling up.

(1) By-products generated by the reaction are gasified through the gas-liquid interface in the container and discharged out of the system. As the scale-up ratio increases, the gas-liquid boundary area with respect to the amount of the processing liquid penetrated decreases. Emission of by-products deteriorates.
As a result, the reverse reaction is promoted, and the time required for the normal reaction becomes longer.

(2) When by-products are discharged out of the system,
In order to maintain the temperature of the reaction system, the amount of latent heat of evaporation must be externally supplied to the reaction system. In the conventional stirring device, the heating surface is only the jacket surface, and as the scale-up ratio increases, the heating area with respect to the treatment liquid penetration amount decreases. As a result, the time required for heating increases, and the operating time per session also increases.

(3) As the size of the stirring device increases, the stirring power also increases. If the stirring heat is larger than the amount of heat removed to the outside, the temperature of the processing liquid will increase. The rise in temperature affects the quality of the processing solution.

An object of the present invention is to solve the above-mentioned problems (1) to (3) in scaling up, and to make the processing time per batch equal to or less than that of the conventional apparatus. An object of the present invention is to provide a stirrer capable of obtaining a product having a quality equal to or higher than the conventional one.

[0008]

Means for Solving the Problems In order to achieve the above object, the stirring device of the present invention is characterized by having the following device structure.

(1) A tapered elliptical or cylindrical container having different inner diameters at both ends installed horizontally, and a spirally continuous outer diameter smaller than the inner diameter of the container in the longitudinal direction in the container. A wound first spiral member, and a plurality of spirally discontinuously wound spirals having a larger winding pitch than the first spiral member while maintaining a small gap between the container wall and the outer periphery of the first spiral member. And a rotary spiral shaft that rotatably supports the stirring blade at both ends of the container.

(2) A container in which two tapered ellipses or cylinders of the same shape having different inner diameters at both ends are abutted on end faces having the same inner diameter, and the agitator according to claim 1 in the longitudinal direction in the container. The blades are constituted by agitating blades which are oppositely wound at one end side and the other end side from the container abutting portion.

(3) In addition to the jacket covering the container, a hollow member is used as the member continuously and spirally wound with a narrow winding pitch constituting the stirring blade, so that the heat medium from the outside of the container is provided in the hollow portion. The heat medium heated by the supply device can be flowed into the inside, so that the heat transfer area per stuck amount increases, and the heating time of the processing liquid is shortened.

(4) By flowing a heat medium for cooling through the stirring blade member, the heat removal area per stuck amount increases, and the amount of overheating due to stirring can be appropriately removed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a chemical reaction is performed by a stirring and mixing operation, and a reaction by-product is discharged to the outside of the system to suppress a reverse reaction and apply the present stirring device to a reaction system in which a forward reaction is promoted. is there.

FIGS. 1 and 2 are a front view and a side view showing the structure of the present embodiment. The stirrer according to the present embodiment is roughly divided into a stirrer, a stirrer, and a driving device.

The stirring tank is constituted by a tapered oval or cylindrical tank wall 1 and a side wall 2 having different inner diameters at both ends. A processing liquid input nozzle 3 and a by-product exhaust nozzle 4 are mounted above the stirring tank, and a processing liquid discharge nozzle 5 is mounted below the stirring tank.

The stirring blade has a rod-shaped frame member 7 mounted between rotary ear shafts 6 installed at both ends in the longitudinal direction of the stirring tank.
And a coil-shaped member 8 continuously wound spirally around a frame member, and while maintaining a small gap with the container wall surface on the outer periphery of the member, the winding pitch is made wider than the spiral-shaped member to discontinue the spiral shape. And a plurality of wing members 9 wound around. The stirring blade is supported by a bearing 10 via a rotating ear shaft 6. Further, the stirring blade and the tank wall 1
In order to keep the gap between the tank wall 1 and the stirring blade member 9 caused by the manufacturing tolerance of the above constant, the outer peripheral dimension of the stirring blade member 9 is adjusted and attached.

A driving device 11 for driving the stirring blade is provided at one end of the rotary ear shaft 6.

Further, a double tube type rotary joint for circulating the heating medium heated or cooled by the heating / cooling medium supply device 13 inside the coiled member 8 is provided on the rotating ear shaft 6 on the non-drive side. 12 are installed.

Next, the operation of the above-structured stirring device will be described. The processing liquid is injected into the container by the processing liquid injection nozzle 3, and the liquid surface position is stretched to the vicinity of the rotating ear shaft 6 (the stretching rate is 50 to 65% based on the total volume). During the stirring, the treatment liquid 20 (FIG. 3) attached to the coil member 8 and the stirring blade member 9 is lifted up to the stirring shaft 6 or more with the rotation of the stirring blade, and then drips down by free fall, thereby causing the coil member to drop. For each pitch of 8, a thin liquid film evaporation surface 21 (FIG. 3) is formed as shown in FIG. During the stirring, by-products produced by the reaction are gasified from the evaporation surface 21 and are efficiently evaporated. After that, the by-product is a by-product exhaust nozzle 4
Through the stirrer. Further, during the stirring, the processing liquid is sent to the end face side where the inner diameter of the container is small due to the feeding action of the coil-shaped member 8 and the stirring blade member 9, so that the processing liquid as shown in FIG. Stream 22
Occurs, and the processing liquid is uniformly mixed. During the reaction, the amount of heat required for evaporating the by-products is such that the heating fluid having a higher temperature than the treatment liquid is supplied to the heating / cooling medium supply device 13 → the double tube type rotary joint 12 → the rotary ear shaft 6 → Heat is absorbed from the outside by circulating in the route of the coil member 8 → frame member 7 → rotating ear shaft 6 → double tube type rotary joint 12 → heating / cooling medium supply device 13. Unnecessary stirring heat generated during stirring of the high-viscosity processing liquid is removed by circulating a cooling fluid having a lower temperature than the processing liquid in the same path. After the reaction is completed, the processing liquid is discharged from a plurality of processing liquid discharge nozzles 5 attached to the lower part of the container.

FIG. 5 shows another embodiment of the present invention. In this embodiment, two tapered ellipses or cylinders of the same shape having different inner diameters at both ends are formed in the longitudinal direction of a container in which end faces having the same inner diameter are butted with each other. And a stirring blade which is oppositely wound on both sides. The operation of this embodiment is the same as that of the above embodiment, but in this embodiment,
With the rotation of the stirring blade, a processing liquid flow shown in FIG. 6 is generated.

As described above, the agitator of the present invention has a larger evaporation surface area and heat transfer area than the conventional batch type agitator having the same filling amount. Can be less than or equal to
A product of the same or higher quality as the conventional type can be obtained.

[0022]

According to the present invention, a chemical reaction is carried out by a stirring and mixing operation, a reaction by-product is gasified and discharged to the outside of the system, thereby suppressing a reverse reaction and promoting a normal reaction. As compared with the conventional batch stirrer having the same filling amount, the processing time per batch can be made equal to or less than that of the conventional batch stirrer, and as a result, a product having the same or higher quality as that of the conventional type can be obtained. .

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a stirring device according to the present invention.

FIG. 2 is a side view showing an embodiment of the stirring device according to the present invention.

FIG. 3 is a diagram showing an evaporation surface formed during stirring in the stirring device of FIGS. 1 and 2;

FIG. 4 is a view showing a flow direction of a processing liquid formed during stirring in the stirring device of FIGS. 1 and 2.

FIG. 5 is a front view showing another embodiment of the stirring device according to the present invention.

FIG. 6 is a diagram showing a flow direction of a processing liquid formed during stirring in the stirring device of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tank wall, 2 ... Side wall, 3 ... Processing liquid input nozzle, 4 ... By-product exhaust nozzle, 5 ... Processing liquid discharge nozzle, 6 ... Rotating ear shaft, 7 ... Frame member, 8 ... Coil member, 9 Stirring blade Members, 10
... Bearing, 11 ... Driver, 12 ... Double tube type rotary joint, 1
3: heating / cooling medium supply device, 20: treatment liquid, 21: evaporation surface, 22: treatment liquid flow.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeo Karasuda 794, Higashitoyoi, Kazamatsu City, Yamaguchi Prefecture Within Hitachi Kasado Engineering Co., Ltd. (72) Inventor Yasunari Sasego 794, Higashitoyoi, Kudamatsu City, Yamaguchi Prefecture Hitachi, Ltd. Inside the Kasado Works of the Works (72) Inventor Hiroo Suzuki 794, Higashi-Toyoi, Kazamatsu City, Yamaguchi Prefecture F Term in the Kasado Works of Hitachi, Ltd. 4G037 CA05 EA03 4G078 AA04 BA01 CA01 DA14 DC08

Claims (4)

[Claims] An elliptical or cylindrical container having a tapered shape having different inner diameters at both ends and horizontally disposed, and spirally continuously wound in a longitudinal direction in the container with an outer diameter smaller than the inner diameter of the container. While maintaining a small gap between the first spiral member and the container wall around the outer periphery of the first spiral member,
A double spiral stirring blade composed of a plurality of second spiral members discontinuously wound in a spiral shape with a larger winding pitch than the spiral member of And a rotating ear shaft rotatably supported by the stirrer. 2. The container according to claim 1, wherein two tapered ellipses or cylinders of the same shape having different inner diameters at both ends are arranged in a container in which end faces having the same inner diameter are abutted with each other, and are arranged in the longitudinal direction in the container. A stirring device comprising a stirring blade, wherein the spiral direction of the spiral member of the stirring blade is oppositely wound at one end side and the other end side from the abutting position of the container. 3. The stirring blade according to claim 1, wherein the member continuously wound spirally at a narrow winding pitch is a hollow member, and a heat medium for heating or cooling can flow inside the hollow member. Item 3. The stirring device according to Item 1 or 2. 4. The stirring device according to claim 1, wherein a tapping nozzle is provided below a portion of the tapered container having a large inner diameter.