JPS6227055A - Centrifugal separator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a centrifugal separator comprising a cylindrical rotating tube elongated in the vertical axis direction.

This type of device is known as a so-called Sharpless ultracentrifuge, and is widely used in industrial fields requiring separation operations, and has a long history.

A typical Sharpless type ultracentrifuge, as shown in FIG. 1, also consists of a vertically oriented rotating barrel 6 housed within a Gu Lang 1 supported by a pedestal 2. For example, a drive plate 4 is attached to the top of the pedestal 2, a motor 5 is attached to one end of the drive plate 4, a bearing assembly 7 is attached to the other end, and the motor pulley 6 and the bearing pulley 28 are connected by a belt 8. A drive unit is provided.

A spindle 9 is provided at the upper middle of the bearing assembly 7, and the spindle and the top tip of the rotary tube are screwed together with a coupling nut 10 to rotatably support the rotary tube in a suspended state. are doing. The bottom of the rotary cylinder 3 is in contact with a bushing 12 provided on the drag 11 at the bottom of the casing 1, and is held so as not to be eccentric.

In such a structure, the object to be processed is placed in a rotating rotary cylinder 3.
The liquid is sent through the inlet 13, centrifuged into the rotary cylinder, and then discharged through the drain port 14, as shown in Figures 2 and 3, respectively.
As shown in the figure, the liquid supply port 13 and the liquid drain port 14 are part of the rotary cylinder and therefore rotate, and are necessarily open to fixed parts such as the casing and the outside world.

For this reason, when the processed material must be protected from contamination from the outside world, such as food or microorganisms, or when there is a risk of contaminating the inside and outside of the machine, the atmosphere around the rotating cylinder must be kept sealed from the outside world. These devices cannot be used because of the Therefore, it could not be called perfect and was virtually unusable.

The present invention is not limited to sealing only the joints of the fixed outer peripheral parts of the centrifugal separator as described above, but also improves the sealing of the parts where both the fixed part and the rotating part are exposed to the outside while the rotating part is rotating. Furthermore, after the separation process of the processed material is completed in this sealed device, and after the processed material remaining in the sealed device and/or the entire interior of the device is sterilized, bacteriological contamination may occur. To provide a centrifugal separator in which the device can be opened with peace of mind and each part can be cleaned in a safe state without any damage.

Hereinafter, the present invention will be described in detail based on the drawings showing preferred embodiments of the present invention.

According to the present invention, a cylindrical rotating cylinder 3 is housed vertically in a casing 1 and has a discharge port 14 at an upper part and a liquid supply port 13 at a lower part, and the upper part of the rotating cylinder is driven through a bearing assembly 7. a spindle 9 that is threadedly engaged with the top of the rotary cylinder by a coupling nut 10 and rotatably supports the rotary cylinder in a suspended state, and a housing 5 of the bearing assembly that surrounds the spindle;
0, a housing in a centrifugal separator comprising a cover assembly 15 on the upper part of the casing and a drag 11 provided on the lower part of the casing, supporting the rotary cylinder so as not to be eccentric when it rotates, and forming a liquid supply passage; 07 rings 6B and 69 are provided between the spindle shield 17 and the spindle shield 17, a 01 ring 70 is provided at the joint between the spindle shield 17 and the hand nut 13, and a 01 ring 70 is provided at the joint between the cover assembly 15 and the upper end of the casing 1. is provided with a "0" ring 42, a gasket 40 is used on the contact surface between the lower end of the casing 1 and the drag 11, and a W□ on the contact surface between the feed nozzle 21 and the drag 11.
An n-ring 41 is provided. The above-mentioned '0'' ring and gasket make all the joints of the fixed outer peripheral part of the centrifugal separator airtight from the outside world.Furthermore, the outer peripheral surface of the sleeve 67, which is the rotating part, has a bushing seal 57.5.
8.59 are installed in three layers surrounding the device, and are pressed onto the outer circumferential surface by springs (not shown), thereby sealing off the inside of the device and the outside world so that no fluid can enter or exit. Furthermore,
An air inlet 60 is attached to the nousing 50 at the bushing seal 57 location, and an air or decontamination gas inlet 61 is attached to the nousing 50 at a location intermediate the bushing seals 59 and 59, respectively, and is directed toward the outer surface of the sleeve 67. It has an opening. The housing 50 is also fitted with an inlet 62 for decontamination gas, an air outlet 63 and an outlet 64, 65 for decontamination gas. Further, as necessary, a pressure gauge 22, a thermometer 23, a heating or cooling coil 24, and a nozzle 25 for introducing a decontaminating gas into the lower part of the casing 1 are provided as shown in FIG.

Since the device of the present invention has the above structure, it can be operated as follows.

First, if necessary, before starting the drive of this device, in order to clean the internal atmosphere inside the sealed device or bring it to the desired condition, the inlet 61, inlet 62, and nozzle 25 are cleaned in the same manner as after the operation is stopped, which will be described later. The operation may be performed, for example, to sterilize or otherwise clean the inside of the equipment to avoid contamination of the processed material. after that,
To start driving, at the same time as the motor 5 starts, the inlet 6
1 through the sleeve 67 and the bushing.
By introducing the seals 58 and 59 into the contact surface and closing the inlet 60, outlet 66, inlet 62, and outlet 64, 65 (because the boundary space between the bushing seals 58 and 59 will have a higher pressure than the surrounding area, A state of isolation from the outside world is formed between the surface of the sleeve at the corresponding position and an airtight state is maintained.Since the fixed outer peripheral joint of the non-rotating part is sealed as described above, driving is started, Even during operation, the inside of the device is kept completely isolated from the outside world.The purpose is achieved with a pressure difference of 02 to 0.3 kg/cm with the surrounding area.

If the processed material requires heating or cooling, a heating or cooling coil 24 may be provided within the casing 1.

When the processing operation is completed, the power switch of the motor 5 is turned off. As the rotary cylinder 3 stops rotating, it no longer receives centrifugal force, so the remaining liquid in the rotary cylinder is transferred to the drag 1 at the bottom of the rotary cylinder.
The receiver is put into the recovery equipment through a recovery hole (not shown) provided in 1. After collection, the collection hole is closed. In this way, only the separated solids remain in the rotating cylinder. In this state, a large amount of air is allowed to flow in through the inlet 60 and flowed out through the outlet 63. For example, when steam is used as a decontamination gas, steam is allowed to flow in through the inlet 61. A portion of this steam passes through the gap between the bushing seal 58 and the sleeve 670, and further passes through the gap between the bushing seal 57 and the sleeve 6.
7 and tries to leak toward the bearings 51 and 52, but this leakage is directed toward the outlet 63 and discharged by the air flow that flows in from the inlet 60 and flows out from the outlet 63. Since steam leakage to the bearing is prevented, heating of the bearing is prevented. The steam flowing in from the inlet 61 sterilizes the bushing seal part and
This prevents steam flowing in from 2 from leaking toward the bearing. Note that in cases where decontamination such as sterilization of the bushing seal portion is not required, the steam from the inlet 61 may be replaced with air. Steam is allowed to flow in not only from the inlet 62 but also from the nozzle 25 if necessary. These steams enter at a pressure slightly lower than that of the steam or air entering the inlet 61, e.g. about 0.2 to 0. ．． 3kg/crIL Use a low pressure one. The inflow of steam from the /through 25 promotes replenishment of steam to the lower part of the casing 1 and heating of the rotary cylinder 6. The steam outlet 64.65 is connected to a steam trap (
(not shown), the inside of the housing 50 below from the bushing seal 59, the cover/seven assembly 15, and the inside of the casing 1 are each kept in a heated steam atmosphere. Furthermore, since the steam enters the inside of the rotary cylinder 3 through the liquid supply port 13 and the liquid drain port 14, everything such as the parts that come into contact with the processing liquid and the remaining solids inside the rotary cylinder are sterilized by the heated steam. Ru. This heat sterilization using steam only needs to be continued for the required time, and once the sterilization is complete, all steam inflow is stopped, the bypass pulp of the steam trap is opened, and the steam in the system is released to the outside world. In this way, normal disassembly and cleaning can be carried out in a safe state where sterilization has been completed.

In the present invention, in addition to steam, air containing a disinfectant and other decontamination gases are appropriately selected and used depending on the purpose.

According to the present invention, the product being centrifuged is sealed within the system to prevent contamination to and from the outside world, and after the separation process is completed, the system is sterilized and then the device is opened. This has the effect that it can be disassembled and cleaned in a safe state, contributing to the development of biotechnology, etc.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of the centrifugal separator of the present invention. FIG. 2 is a side cross-sectional explanatory view of the lower part of the device of the present invention. FIG. 3 is a side cross-sectional explanatory view of the upper part of the device. FIG. 4 is a side sectional explanatory view showing the lower part of the housing 50 of the above device. FIG. 5 is a side sectional explanatory view showing the housing 50 of the above device. FIG. 6 is a system explanatory diagram regarding the flow of air and steam shown in the embodiment of the present invention. Casing ・・・・・・・・・ 1 Rotating tube ・・・・・・・・・ 3 Spindle ・・・・・・・・・ 9 Camp ring nut ・・・ 10 Drag ・・・・・・・・・11 Liquid supply port ・・・・・・・・・ 13 Drainage port
Mouth: 14 sleeves
・・・・・・・・・ 17) Zuru・・・・・・
... 25 Zutsusing Seal - 57.58.5
9 people ・・・・・・・・・60
．． 61. Exit 62...
・63． 64. 65Figure 5Figure 6

Claims (1)

[Claims] 1. A cylindrical rotating cylinder 3 which is vertically housed in a casing 1 and has a discharge port 14 at the upper part and a liquid supply port 13 at the lower part, and the upper part of the rotating cylinder is A spindle 9 that is screwed to the top of the rotary cylinder by a coupling nut 10 and rotatably supports the rotary cylinder in a suspended state so as to be interlocked with the drive part; a housing 50 of the bearing assembly that surrounds the spindle; A cover assembly 15 on the upper part of the casing and a drag 11 provided on the lower part of the casing to support the rotary cylinder so that it does not become eccentric when it rotates, and to form a liquid supply passage.
In a centrifugal separator consisting of
The seals 57, 58, and 59 form an airtight structure, and when the device is in operation, air is supplied from the inlet 61 provided in the housing to create a boundary space between the bushing seals 58 and 59 at a higher pressure than the surrounding area, and from this position. The bottom is airtight from the outside world, and after the device has stopped operating, air flows into the boundary space between the bushing seals 57 and 58 through the inlet 60, air flows out through the outlet 63, and a contaminant is removed through the inlet 61. A gas or air is introduced to fill the boundary space between the bushing seals 58 and 59, and a decontamination gas at a pressure somewhat lower than that of the decontamination gas or air flowing in through the inlet 61 is introduced through the inlet 62. Exits 64 and 6
A centrifugal separation device that allows contamination inside the device to be removed while maintaining an airtight condition by circulating the fluid through a trap that communicates with the device. 2. The centrifugal separator according to claim 1, in which the same decontamination gas is introduced from the nozzle 25 at the same time as the decontamination gas is introduced from the inlet 62. 3. The centrifugal separator according to claim 1 or 2, wherein the decontamination gas is steam.