JPH0212136B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a high heat transfer type stirring device suitable for use in stirring culture for culturing microorganisms and cells, polymerization equipment, etc.

[Background of the invention]

Conventionally, high heat transfer type stirring devices have a coiled heat transfer tube placed inside the stirring tank body, and by circulating a refrigerant or heating medium through the heat transfer tube, the temperature inside the tank can be rapidly increased. It was being cooled or heated. This type of stirring device is disclosed, for example, on page 313 of "Biochemical Engineering" by Shuichi Aiba et al., published by the University of Tokyo Press.

By the way, in the above-mentioned device, when a baffle is provided on the main body wall to increase the stirring effect, it is necessary to arrange the coiled heat transfer tube so that it does not come into contact with the buffle, which ultimately increases the heat transfer area of the heat transfer tube. I can't take it. In addition, since the coiled heat transfer tube is arranged from the bottom to the top of the tank, the area near the main body wall and the area near the stirring shaft are separated, which poses the problem of making it difficult to thoroughly clean the main body wall. left behind.

[Purpose of the invention]

An object of the present invention is to provide a high heat transfer type stirring device that can increase the heat transfer area and effectively transfer heat by the buffling effect.

[Summary of the invention]

The present invention provides a stirring shaft having stirring blades provided in the center of the stirring tank, and a plurality of concentric annular headers located on the outer periphery of the stirring shaft and provided at the upper and lower parts of the stirring tank, respectively. , a plurality of heat exchanger tubes provided between the plurality of upper and lower annular headers and locally concentrated in the circumferential direction of the header, and a plurality of heat exchanger tubes independently provided in the plurality of upper and lower annular headers. It is characterized by being provided with an inlet/outlet for supplying or extracting the provided refrigerant or heating medium from the outside of the tank.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail based on specific examples.

FIG. 1 is a diagram according to an embodiment of the present invention, and shows a longitudinal cross-sectional view. Moreover, FIG. 2 shows a sectional view taken along the line AA in FIG. 1. In these figures, 1 is the stirring tank main body, and 8 is a stirring shaft provided in the center of the tank.
Moreover, 7a and 7b are stirring blades attached to the stirring shaft 8. 2a, 2b, and 2c are annular headers at the top of the tank, respectively. Also, 3a, 3b, 3c
are the annular headers at the bottom of the tank, respectively. 2a
and 3a are a pair of upper and lower annular headers, and similarly, 2b and 3b, and 2c and 3c are each a pair of upper and lower annular headers. Therefore, in this embodiment, three sets of annular headers are arranged.
A heat transfer tube 6a is connected between the annular headers 2a and 3a. A plurality of heat transfer tubes 6a are arranged in the circumferential direction of the annular header. 6b is also a heat transfer tube and is connected between the upper and lower annular headers 2b and 3b. A plurality of heat transfer tubes 6b are also provided in the circumferential direction of the annular header. Similarly, 6c is also a heat transfer tube, which is connected between the upper and lower annular headers 2c and 3c, and a plurality of tubes are connected in the circumferential direction. The inlet/outlet 4a is connected to the annular header 2a, and is used to supply a refrigerant or a heat medium to the header 2a, and conversely to extract it from the header side. Entrance/exit 4b,
4c is also connected to the annular headers 2b and 2c, respectively, and is used for the same purpose. Doorway 5
A is connected to the annular header 3c, and is used to supply a refrigerant or heat medium to the header 3a, and conversely to extract it from the header side. Entrance/exit 5b, 5c
are also connected to the annular headers 3b and 3c, respectively, and are used for the same purpose. Now 4a
When the refrigerant (or heat medium) is supplied to the header 2a, the refrigerant passes through the heat transfer tubes connected in the circumferential direction of this header and reaches the lower header 3a,
It is taken out from the entrance/exit 5a. Of course, the refrigerant (or heat medium) may be supplied in the reverse order.
The same applies to others. A stirring shaft 8 provided at the center of the tank 1 is rotationally driven by a motor or the like (not shown), and stirring blades 7a and 7b stir the liquid in the tank. With such a configuration in which the upper and lower annular headers are connected by a plurality of heat transfer tubes, the heat transfer area is dramatically increased compared to the conventional method, and high heat transfer can be achieved.

Further, in this embodiment, as shown in FIG. 2, heat exchanger tubes 6a, 6b, and 6c are locally arranged in the circumferential direction of the header. This makes it possible to ensure a path for liquid to enter and exit the tank from the manhole 9, and to provide a buffling effect to improve the heat transfer effect of the stirring tank.

FIG. 3 shows another embodiment of the present invention, in which heat exchanger tubes 6a, 6b, and 6c are arranged in a triangular arrangement. As a result, the stirring blades 7a, 7b
to homogenize the stirring flow direction 10 of the liquid produced by,
Uniform temperature distribution in the circumferential direction within the tank can be achieved.

〔Effect of the invention〕

According to the present invention, it is possible to increase the heat transfer area and to perform heat transfer effectively due to the buffling effect.

[Brief explanation of drawings]

1 and 2 are diagrams showing one embodiment of the invention, and FIG. 3 is a diagram showing another embodiment of the invention. 1... Stirring tank body, 2a, 2b, 2c... Upper annular header, 3a, 3b, 3c... Upper annular header, 4a, 4b, 4c... Entrance/exit, 5
a, 5b, 5c... Entrance/exit, 6a, 6b, 6c...
...Heat transfer tube, 7a, 7b... Stirring blade, 8... Stirring shaft, 9... Manhole.

Claims (1)

[Scope of Claims] 1. A stirring shaft having stirring blades provided at the center of the stirring tank, and a plurality of concentric shafts located at the outer periphery of the stirring shaft and provided at the upper and lower parts of the stirring tank, respectively. an annular header, a plurality of heat transfer tubes each provided between the plurality of upper and lower annular headers and locally concentrated in the circumferential direction of the header, and each of the plurality of upper and lower annular headers. A high heat transfer stirring device characterized by having an independently provided inlet/outlet for supplying or extracting a refrigerant or heat medium from outside the tank. 2. The high heat transfer stirring device according to claim 1, wherein the heat transfer tubes are arranged locally in a triangular arrangement.