JPH0568970A - Live bacteria removing device - Google Patents

Abstract

PURPOSE:To enhance the purity of pure water, to dispense with the use of a chemical agent, to prevent the contamination due to the remaining of the chemical agent, to simplify a structure and to reduce cost. CONSTITUTION:The rotary drum 7 rotated at a high speed by the driving of a motor 5 and a plurality of the pure water reservoirs 8 connected to the outer peripheral part of the rotary drum 7 at an equal interval in the circumferential direction thereof by pins 9 are provided and live bacteria in pure water are settled on the bottom parts of the pure water reservoirs 8 by centrifugal force and the settled live bacteria are removed through suction tubes 11c and a rotary joint 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viable cell removing device,
In particular, the present invention relates to a technique effective when applied to a viable cell removing device for removing viable cells and the like in liquids such as pure water and solutions.

[0002]

2. Description of the Related Art As an apparatus for removing live bacteria of this type, for example, an apparatus for removing live bacteria by injecting a chemical solution (Japanese Patent Laid-Open No. 60-7869)
No. 0) and a device for removing viable bacteria by heating with pure water (Japanese Patent Laid-Open Publication No. 63-63160)
-42787).

The above-mentioned apparatus for removing viable bacteria by injecting a drug is
This is a structure in which a chemical is injected into the end of the pipe when pure water is not used to prevent contamination with live bacteria.

The above-mentioned apparatus for removing live bacteria by heating pure water is
Based on a heat exchanger that heats pure water by heat exchange, a heat medium supply device that supplies a heat medium to this heat exchanger, a temperature sensor that detects the pure water temperature, and a detection signal from this temperature sensor, It has a controller for controlling the water temperature, and has a structure for preventing contamination of live bacteria by heating pure water.

[0005]

However, in the above-described structure of the viable cell removing device by chemical injection, it takes a lot of time to replace the chemical solution in the pipe with pure water, and the pure water is not used during that time. Not only is it impossible, but there is also the problem that contamination occurs due to residual chemicals in the pipe.

Further, the above-mentioned structure of the apparatus for removing live bacteria by heating pure water has a problem that the structure is complicated and the cost is high.

[0007] Further, in any of the structures of the viable cell removing device by injecting chemicals or heating pure water as described above, it is difficult to remove dead bodies such as viable cells, and thus the purity of pure water is lowered. was there.

An object of the present invention is to provide a viable cell removing device which can improve the purity of liquid.

[0009] Another object of the present invention is to provide a viable bacterium removing apparatus which makes it unnecessary to use a drug and prevents contamination due to the residue of the drug.

Another object of the present invention is to provide a viable cell removing device which can simplify the structure and reduce the cost.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0012]

Among the inventions disclosed in the present application, a brief description will be given to the outline of typical ones.
It is as follows.

That is, the viable cell removing apparatus of the present invention has a rotary drum that rotates at a high speed by driving a drive source, a plurality of liquid reservoirs provided on the outer peripheral portion of the rotary drum, and a bottom portion of the liquid reservoir by centrifugal force. The structure comprises a means for removing viable bacteria etc. that has settled.

In this case, the means for removing viable bacteria etc. may have a structure including a suction tube for viable bacteria etc. having a suction port at the bottom of the liquid reservoir, and a rotary joint provided on the rotary shaft of the rotary drum. it can.

[0015]

When the rotating drum is rotated at a high speed together with the liquid reservoir to remove viable bacteria etc. in the liquid, the viable bacteria etc. in the liquid in the liquid reservoir are settled by centrifugal force, and the precipitated viable bacteria etc. Are removed through a suction tube for viable bacteria and a rotary joint.

Therefore, the purity of the liquid can be improved.

Further, it is possible to prevent the use of a drug, which has been a problem in the past, and prevent contamination due to the residual drug.

In this case, since the means for removing viable bacteria and the like has a structure including a suction tube for viable bacteria and the like having a suction port at the bottom of the liquid reservoir, and a rotary joint provided on the rotary shaft of the rotary drum, The structure can be simplified and the cost can be reduced.

[0019]

EXAMPLE FIG. 1 is a sectional view showing a viable cell removing apparatus according to an example of the present invention.

The viable cell removing apparatus in this embodiment removes viable cells and the like in pure water by utilizing centrifugal force and has a casing 1. A vertical rotating shaft 2 is rotatably provided inside the casing 1 via a thrust bearing portion 3a and a radial bearing portion 3b, and a driven pulley 4a is fixed to a lower end portion of the rotating shaft 2 and the driven pulley 4a is fixed. The belt 6 is provided between the drive pulley 4b of the motor (drive source) 5 and the drive pulley 4b.
Has been passed over.

A rotary drum 7 is fixed to the rotary shaft 2, and a plurality of pure water reservoirs (liquid reservoirs) 8 are joined to the outer peripheral wall of the rotary drum 7 by pins 9 at equal intervals in the circumferential direction. It has a structure that tilts due to centrifugal force.

The cap 10 of the pure water reservoir 8 is provided with a pure water supply tube 11a, an ultrapure water suction tube 11b and a viable bacteria suction tube 11c, and the pure water supply tube 11a is the cap of the pure water reservoir 8. 10 has a supply port 12a in the vicinity thereof, and the ultrapure water suction tube 11b is located at a certain level from the bottom of the pure water reservoir 8 at the suction port 1
2b, and the suction tube 11c for living bacteria is a pure water reservoir 8
Has a suction port 12c at the bottom.

The tubes 11a to 11c are connected to the axial flow passages 15a to 15c via the flexible tubes 14a to 14c, and the axial flow passages 15a to 15c are rotatably connected to the rotary joint 16 in a sealed state. It has a structure that

That is, annular connecting passages 17a to 17c are formed on the inner peripheral surface of the rotary joint 16, and the connecting passages 17 are formed.
The axial flow passages 15a to 15c are opened at positions on the outer peripheral surface of the rotary shaft 2 corresponding to a to 17c. The connection channel 1
7a to 17c are connected to the pure water supply port 13a, the ultrapure water suction port 13b, and the live bacteria suction port 13c, respectively.

Reference numeral 18 is an O-ring.

Next, the operation of this embodiment will be described.

When the viable bacteria etc. in pure water are removed by using the viable bacteria removing apparatus having the above-described structure, first, the rotary drum 7 is rotated at high speed by driving the motor 5, and each pure water reservoir 8 is caused by centrifugal force. Tilts diagonally.

Next, the pure water obtained by the pure water producing apparatus is supplied to each pure water reservoir 8 through the pure water supply port 13a, the connection flow path 17a, the axial flow path 15a, the flexible tube 14a and the pure water supply tube 11a. Supply through.

Viable bacteria and the like in the supplied pure water are subjected to centrifugal force to settle on the bottom of the pure water reservoir 8 and separated.

Therefore, the number of rotations of the rotary drum 7 is reduced, and the separated ultrapure water is sucked by the ultrapure water suction tube 11b, and the flexible tube 14b, the axial flow path 15b, the connection flow path 17b and the pure water are drawn. It is supplied to a semiconductor integrated circuit manufacturing apparatus such as a wafer cleaning apparatus through the suction port 13b.

After the suction of the ultrapure water, the viable bacteria etc. that have settled down are sucked by the viable bacteria suction tube 11c to obtain the flexible tube 1.
4c, the in-shaft flow path 15c, the connection flow path 17c, and the viable bacteria etc. suction port 13c to discharge the viable bacteria etc. to the discharge tank.

By repeating the above-mentioned process, viable bacteria and the like in pure water can be removed, the purity of pure water can be improved, and ultrapure water can be obtained.

Therefore, it is possible to eliminate the use of the drug, which has been a problem in the past, and prevent contamination due to the residual drug.

Further, since it has a structure for removing viable bacteria in pure water by centrifugal force, the structure can be simplified and the cost can be reduced.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in the above-mentioned embodiment, the case where the cap of the pure water reservoir is provided with the ultrapure water suction tube and the living bacteria suction tube is not limited to this, but the bellows may be provided inside the pure water reservoir. Is provided, the bellows is inflated by air pressure and the separated ultrapure water is pushed up and supplied,
Furthermore, the bellows can be inflated to push up live bacteria and the like for discharge.

Further, in the above-mentioned embodiment, the case where the pure water reservoir is provided on the rotary drum by the pin connection has been described.
Not limited to this, the pure water reservoir may be extended and fixed to the rotary drum in the radial direction.

Further, in the above-mentioned embodiment, the case where the viable bacteria and the like in the pure water obtained by the pure water producing apparatus was removed by centrifugation was described, but the present invention is not limited to this. Viable bacteria and the like can be further removed by centrifugation.

Further, in the above embodiment, the case where the viable bacteria and the like in the pure water obtained by the pure water producing apparatus was removed by centrifugation was described. However, the present invention is not limited to this. It is also possible to use in combination with removal of live bacteria.

Further, in the above-mentioned embodiment, the case where the viable bacteria and the like in the pure water obtained by the pure water producing apparatus was removed by centrifugation was described, but the present invention is not limited to this, and ion exchange, ultraviolet irradiation and sterilization by a filter are carried out. It is also possible to combine the removal and the removal of viable bacteria by centrifugation.

In the above description, the invention mainly made by the present inventor has been explained by the viable cell removing device for removing viable cells in pure water which is the background field of the invention. However, the invention is not limited to this. It can also be applied to a viable cell removal device that removes viable cells and the like in other liquids such as solutions.

[0042]

The effects obtained by the representative ones of the inventions disclosed in this application will be briefly described as follows.

(1). A rotating drum that rotates at a high speed by driving a driving source, a plurality of liquid reservoirs provided on the outer peripheral portion of the rotating drum, and live bacteria and the like settled on the bottom of the liquid reservoir by centrifugal force are removed. Since it has a structure including a means for removing viable bacteria, etc., viable bacteria in the liquid are removed by using centrifugal force,
The purity of the liquid can be improved.

(2) Due to the effect of the above (1), the drug which has been a problem in the past can be dispensed with and the contamination due to the residue of the drug can be prevented.

(3) In the case of (1) above, the means for removing viable bacteria is a suction tube for viable bacteria having a suction port at the bottom of the liquid reservoir, and a rotary joint provided on the rotary shaft of the rotary drum. Since the structure is provided with, the structure can be simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a viable cell removing device according to an embodiment of the present invention.

[Explanation of symbols]

 1 casing 2 rotating shaft 3a thrust bearing part 3b radial bearing part 4a driven pulley 4b drive pulley 5 motor (driving source) 6 belt 7 rotating drum 8 pure water reservoir (liquid reservoir) 9 pin 10 cap 11a pure water supply tube 11b Ultrapure water suction tube 11c Living bacteria suction tube 12a Supply port 12b Suction port 12c Suction port 13a Pure water supply port 13b Ultrapure water suction port 13c Living bacteria suction port 14a Flexible tube 14b Flexible tube 14c Flexible tube 15a In-shaft flow path 15b In-shaft flow path 15c In-shaft flow path 16 Rotary joint 17a Connection flow path 17b Connection flow path 17c Connection flow path 18 O-ring

Claims (2)

[Claims] 1. A rotary drum that rotates at a high speed by driving a drive source, a plurality of liquid reservoirs provided on the outer periphery of the rotary drum, and a viable bacterium that removes viable bacteria and the like settled at the bottom of the liquid reservoir by centrifugal force. A device for removing live bacteria, comprising a device for removing bacteria and the like. 2. The means for removing viable bacteria and the like includes a suction tube for viable bacteria and the like having a suction port at the bottom of the liquid reservoir, and a rotary joint provided on a rotary shaft of a rotary drum. Item 1. A viable cell removal device according to item 1.