JP2002143722A - Centrifugal separator and cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide both a centrifugal separator completely removing residue of a solid material adhering to the holes of a cylindrical basket arranged in the inside of a casing or to the aperture parts of a filter cloth and to the gaps of the cylindrical basket and the filter cloth, and a washing method. SOLUTION: In relation to the centrifugal separator and the cleaning method, the centrifugal separator is equipped with a casing 1 housing a drumlike basket 2 mounted on a supporting base 14, rotated and controlled by a viable speed motor 11. Many through holes 4 are formed in the peripheral wall part 5 of the drumlike basket 2 and also a filter cloth 3 is laid on the inner surface of the drumlike basket 2. After a solid matter (cake) 12 deposited on the surface of the filter cloth 3 is scraped by a scraping device and scraping is finished, either an ultrasonic vibrator 24 or a bubble generator 30 or both are fitted to a storing site of the casing 1 storing a cleaning liquid 13. Thereby, the residue of the solid matter 12 stuck to the holes 4 of the drumlike basket 2 or the aperture parts of the filter cloth 3 and the gaps of the drumlike basket 2 and the filter cloth 3 is completely removed by action of cavitation phenomena of the ultrasonic vibrator 24 and the bubble generator 30 and bubbles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal separator for solid-liquid separation of medicines, foods, etc., wherein solid residues and deposits adhered to a basket or filter cloth mounted on the centrifuge. And a washing method.

[0002]

2. Description of the Related Art An example of a conventional centrifugal separator in the prior art is shown in FIG. If the conventional technique is described based on FIG. 6, reference numeral 1 denotes a casing having a shape such as a cylindrical body. Inside the casing 1, a cylindrical basket 2 is arranged. A filter cloth 3 is laid on the inner surface of the cylindrical basket 2. The peripheral wall 5 of the cylindrical basket 2 has a large number of through holes 4. The cleaning liquid pipes 8 and 9 are inserted into the casing 1 through the side wall 6 and the cover plate 7 of the casing 1 respectively. Reference numeral 10 denotes a chute for discharging solid matter, which is provided on the casing 1 from the cover plate 7 of the casing 1.
It is inserted and placed inside. Reference numeral 11 denotes a variable speed motor for controlling rotation and stop of the cylindrical basket 2. In the figure, reference numeral 12 denotes a solid deposited on the surface of the filter cloth 3, and reference numeral 13 denotes a cleaning liquid stored at the bottom of the casing 1.

The method of cleaning a centrifugal separator according to the prior art will be described. The solid material 12 deposited on the surface of the filter cloth 3 of the cylindrical basket 2 is scraped by a scraping device (not shown). After taking, the washing jets 8a, 9 are removed from the upper and inner surfaces of the tubular basket 2 by the washing liquid pipes 8, 9 while rotating the tubular basket 2.
a, by spraying a, the cylindrical basket 2 or the openings 4 of the cylindrical basket 2 and the openings of the filter cloth 3, as well as the deposits such as residues and particles of the solid matter 12 adhered to the gap between the cylindrical basket 2 and the filter cloth 3. This was the method of washing the centrifuge to be removed.

[0004]

According to the above-mentioned prior art, the cleaning jets 8a and 9a are sprayed from the upper and inner surfaces of the cylindrical basket 2 by the cleaning liquid pipes 8 and 9, respectively. A centrifugal separator and a method for cleaning the same by immersing the cylindrical basket 2 in the cleaning liquid 13. The adhered matter such as the residue and particles of the solid matter 12
It is in a state of being caught on the opening of the cloth 3 and the like. Therefore, the attached matter such as the residue or particles of the solid matter 12 adhered to the cylindrical basket 2 or the opening 4 of the cylindrical basket 2 or the opening of the filter cloth 3 or the gap between the cylindrical basket 2 and the filter cloth 3 is completely removed. Was difficult.

On the other hand, deposits such as residues and particles of the solid matter 12 adhered to the cylindrical basket 2, its through holes 4, openings of the filter cloth 3, or gaps between the cylindrical basket 2 and the filter cloth 3 are removed. For complete removal, there is a problem in that it is necessary to increase the number of cleaning liquid pipes 8 and 9 or to supply a large amount of the cleaning liquid 8a and 9a for a long time.
In particular, in the pharmaceutical industry, a centrifuge compatible with the standards (GMP) for manufacturing control and quality control of pharmaceuticals, in which the inside of the casing 1 and the inside of the cylindrical basket 2 of the centrifuge are required to be extremely clean. It was difficult to use.

[0006]

According to the present invention, there is provided a centrifuge and a washing method according to the present invention, wherein a portion of the casing 1 stored in the washing liquid 13 in the casing 1 in the centrifuge is provided.
By installing the ultrasonic vibrator 24 and the bubble generator 30, the cylindrical basket 2 installed in the casing 1 of the centrifugal separator, the opening 4 of the through hole 4 and the filter cloth 3, or the cylindrical basket 2 Solid matter 12 adhered to the gap with cloth 3
It is an object of the present invention to provide a novel centrifugal separator and a novel washing method that can efficiently and automatically perform the washing, in order to completely remove the residue and the attached matter such as particles. Below, the configuration,
The means will be described.

According to the first aspect of the present invention, a casing, a cylindrical basket provided with a large number of through holes in a peripheral wall portion provided in the casing, a filter cloth disposed on an inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. A centrifugal separator, wherein a washing liquid for immersing the washing liquid is stored in the casing, and an ultrasonic vibrator is attached to a portion of the casing where the washing liquid is stored.

According to the second aspect of the present invention, a casing, a cylindrical basket provided with a large number of through holes in a peripheral wall provided in the casing, a filter cloth disposed on an inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. A centrifugal separator, wherein a washing liquid for immersing the washing liquid is stored in the casing, and a bubble generator is attached to a portion of the casing where the washing liquid is stored.

According to the third aspect of the present invention, a casing, a cylindrical basket having a large number of through holes in a peripheral wall portion installed in the casing, a filter cloth disposed on an inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. A centrifugal separator characterized in that a washing liquid for immersing the washing liquid is stored in the casing, and an ultrasonic vibrator and a bubble generator are mounted on a portion of the casing where the washing liquid is stored.

According to a fourth aspect of the present invention, the ultrasonic vibrator or the bubble generator is mounted flush with a portion of the casing. It is.

According to the fifth aspect of the present invention, a casing, a cylindrical basket provided with a large number of through holes in a peripheral wall provided in the casing, a filter cloth disposed on an inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. The washing liquid to be immersed is stored in the casing, and while the basket is being rotated at a low speed, the cavitation effect by the ultrasonic vibrator attached to the part of the casing where the washing liquid is stored,
A method for cleaning a centrifuge, comprising removing a residue attached to the basket or the filter cloth.

According to the invention of claim 6, the casing, a cylindrical basket having a large number of through holes in a peripheral wall portion installed in the casing, a filter cloth disposed on an inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. Is stored in the casing, and while the basket is being rotated at a low speed, the bubbles adhered to the basket or the filter cloth by the action of the bubbles generated by the bubble generator attached to the part of the casing where the washing liquid is stored. This is a method for washing a centrifugal separator, characterized by removing water.

According to the invention of claim 7, the casing, a cylindrical basket provided with a large number of through holes in a peripheral wall portion installed in the casing, a filter cloth arranged on an inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. The washing liquid to be immersed is stored in the casing, and while the basket is being rotated at a low speed, the cavitation effect by the ultrasonic vibrator attached to the part of the casing where the washing liquid is stored and the action of bubbles by the bubble generator are used. A method for cleaning a centrifuge, comprising removing a residue attached to a basket or a filter cloth.

According to the invention of claim 8, the centrifugal separator according to claim 5, 6 or 7, wherein the ultrasonic vibrator or the bubble generator is mounted flush with a portion of the casing. Is a cleaning method.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a centrifuge and a washing method according to the present invention will be described with reference to the accompanying drawings.

Embodiment 1 Hereinafter, Embodiment 1 of a centrifuge according to the present invention will be described.

FIG. 1 is a sectional view showing a horizontal type centrifugal separator according to the present invention. Reference numeral 1 denotes a casing having a substantially cylindrical shape or a substantially cubic shape supported by the support base 14. 2 is a cylindrical basket, which has a cylindrical peripheral wall portion 5;
It has a rear side wall portion 15 and an annular end wall portion 16. The cylindrical basket 2 is provided with a rotating shaft 17 at a substantially central portion of the outer bottom surface of the rear side wall portion 15 through the side wall 6 of the casing 1. The other end of the rotating shaft 17 is connected to a rotating shaft 11 a of the variable speed motor 11 via a rotating belt 18. 19
Denotes a bearing device, which is provided with a bearing 19a disposed around the rotation shaft 17 and supports the rotation shaft 17. The bearing device 19 is mounted above the variable speed motor 11. The variable speed motor 11 is mounted on the support 14. Reference numeral 20 denotes a drive unit cover,
The variable speed motor 11 and the bearing device 19 are covered. Also, the power is supplied to the rotating shaft 1 by the variable speed motor 11.
1a is transmitted to the cylindrical basket 2 via a rotating belt 18 and a rotating shaft 17, and the cylindrical basket 2 is driven to rotate.

A large number of through holes 4 are formed in the peripheral wall 5 of the cylindrical basket 2. A filter cloth 3 is laid on the inner surface of the cylindrical basket 2, that is, on the inner surface of the peripheral wall portion 5. The filter cloth 3 is formed of, for example, a polyethylene material, a polypropylene material, another resin material, a metal material, or the like. A cleaning liquid pipe 8 supplies cleaning water, a chemical having a cleaning effect, and the like from the outside. The cleaning liquid pipe 8 penetrates the side wall 6 of the casing 1 and is disposed inside the casing 1, and at a predetermined interval, a plurality of nozzles 8b,
8b, the jetting liquids 8a, 8a are discharged from the outer surface of the peripheral wall 5 of the cylindrical basket 2, and the cylindrical basket 2
Alternatively, the through holes 4 and the filter cloth 3 are washed. Reference numeral 9 denotes a cleaning liquid pipe different from the cleaning liquid pipe 8 for supplying cleaning water, a chemical having a cleaning effect, and the like from the outside. The cleaning liquid pipe passes through the cover plate 7 of the casing 1 and has a cylindrical shape. It is arranged inside the basket 2 and at a predetermined interval,
A plurality of nozzles 9b, 9b are arranged vertically, and the jet liquids 9a, 9a are discharged to the solid material 12 deposited on the surface of the filter cloth 3 laid on the inner surface of the cylindrical basket 2, and the solid material 12 is washed. . After the solids 12 are scraped off, the filter cloth 3 is washed from inside the peripheral wall 5 of the cylindrical basket 2.

Reference numeral 10 denotes a chute for discharging solids, and an opening 10a at the upper end faces the peripheral wall 5 of the cylindrical basket 2. The lower end of the solid material discharging chute 10 is provided with an outlet 10b for taking out the collected solid material 12. Reference numeral 21 denotes an undiluted liquid supply pipe for supplying undiluted liquids of foods and chemicals. The undiluted liquid supply pipe 21 penetrates the cover plate 7 of the casing 1 and is disposed in the cylindrical basket 2. Is supplied into the cylindrical basket 2 from outside. A drain 1b is provided at the bottom 1a of the casing 1 to which a discharge pipe 23 provided with a valve 22 is connected. By closing the valve 22, the cleaning liquid 13 can be stored in the casing 1.

Reference numeral 24 denotes an ultrasonic vibrator, and the cleaning liquid 1
3 is mounted on the bottom 1a of the casing 1 in which it is stored, on the side wall 6, or on the cover plate 7 or the like. The ultrasonic vibrator 24
For example, a horn type, a sweep type, a middle wave type, a mega wave type, or the like is used, and a substantially disk-shaped ultrasonic vibration surface portion 24a faces the cleaning liquid 13 as shown in FIG.

In FIG. 2, a bottom 1 of the casing 1 is shown.
A hole 1c is provided in a portion of the bottom portion 1a, and a step portion 1d is formed on the inner peripheral edge of the bottom portion 1a. Then, the ultrasonic vibrator 24 is inserted from above or below the perforated hole 1c of the casing 1, and the surface of the ultrasonic vibrating surface portion 24a is flush with the upper surface of the bottom portion 1a of the casing 1. Set as follows. Further, a plurality of, for example, four screw rods 24b are integrally formed on the peripheral edge of the lower surface of the ultrasonic vibration surface portion 24a. On the other hand, a predetermined portion of the step portion 1d, for example, around 4
Bolts 24c are welded and screwed at two places, and packing 26 is attached to the screw rods 24b and the bolts 24c.
And, it is screwed and fixed by nuts 25a and 25b via a flange 27. Thus, the ultrasonic vibrator 24 is fixed to the casing 1. In the figure, reference numeral 33 denotes a lead wire for inputting an electric signal to the ultrasonic vibrator 24.

Next, the operation and cleaning method of the centrifuge according to the first embodiment of the present invention will be described. In the case of performing solid-liquid separation processing of food and medicine by the centrifugal separator,
The scraping device (not shown) is pulled down, the scraping blade provided in the scraping device is retracted inside the cylindrical basket 2, and the valve 22 of the discharge pipe 23 is opened and set. Then, the variable speed motor 11 is driven to rotate the cylindrical basket 2 at a high speed, and also supplies a stock solution of food or medicine in a slurry form from a stock solution supply pipe 21. After the supply of the undiluted solution, the high-speed rotation of the cylindrical basket 2 is continued until a certain time. Then, the undiluted solution is drained, and the draining step of the centrifuge is completed. Next, after the liquid removing step is completed, a cleaning liquid such as cleaning water or a chemical liquid is supplied from the cleaning liquid pipe 9 while the rotation of the cylindrical basket 2 is maintained, and the jet liquid 9a is discharged from the plurality of nozzles 9b. The residual liquid adhering to the solid matter 12 deposited on the surface of the filter cloth 3 of the cylindrical basket 2 is washed. Next, the supply of the cleaning liquid from the cleaning liquid pipe 9 is stopped, and the cylindrical basket 2 is further rotated for a certain period of time to perform a liquid removal process. After completion of the liquid removing step, the rotation of the variable speed motor 11 is reduced, and the rotation speed of the cylindrical basket 2 is reduced
The speed is reduced to a speed at which scraping is possible. Then, after the rotation speed of the cylindrical basket 2 is reduced to a speed at which scraping is possible, the scraping device operates to scrape off the solids 12 deposited on the surface of the filter cloth 3 and discharge the solids. The chute 10 is dropped into the opening 10a. Thus, the step of scraping the solid 12 is completed. The solid (cake) is taken out of the chute 10 through the outlet 10b. After the step of scraping the solid material 12 is completed, the scraping device is stopped, restored to the original position, and the stock solution is supplied again from the stock solution supply pipe 21. The process of scraping the object 12 is repeated.

After a predetermined amount of the undiluted solution is subjected to solid-liquid separation or the solid 12 is taken out from the solid discharge chute 10, the cylindrical basket 2 and the filter cloth 3 are washed. When washing the cylindrical basket 2 and the filter cloth 3, after the solid matter 12 is discharged from the solid matter discharge chute 10, washing water, hot water or other water is discharged from the washing liquid pipes 8 and 9 while the valve 22 is kept open. Then, a cleaning liquid such as a chemical solution is supplied, and spray cleaning is performed by spray injection into the casing 1 with the spray liquids 8a and 9a. After the spray cleaning is completed, the rotation speed of the cylindrical basket 2 is further reduced to close the valve 22, the cleaning liquid 13 is stored in the casing 1, and when the level reaches a set level by a level detector (not disclosed), the cleaning is performed. Pipe 8,
Stop the washing solution from 9. And as shown in FIG.
The cleaning liquid 13 is stored near the bottom 1a of the casing 1. At this time, the peripheral wall portion 5 of the cylindrical basket 2 needs to be immersed in the cleaning liquid 13. Thus, the immersion step of the cylindrical basket 2 is completed.

Next, in a state where the peripheral wall 5 of the cylindrical basket 2 is immersed in the cleaning liquid 13, the variable speed motor 11 is driven to rotate to rotate the cylindrical basket 2. Thus, the cylindrical basket 2 and the filter cloth 3 are washed. Although the cylindrical basket 2 and the filter cloth 3 are cleaned in the cleaning step, the solids adhered to the cylindrical basket 2 and the openings 4 of the cylindrical basket 2 and the openings of the filter cloth 3 or the gaps between the cylindrical basket 2 and the filter cloth 3. It is insufficient to completely remove the deposits such as residues and particles of the substance 12.

Therefore, when an electric signal is input to the lead wire 33, the ultrasonic vibrator 24 operates to cause a cavitation phenomenon in the cleaning liquid 13. Here, the operation of the ultrasonic vibrator 24 will be described. The ultrasonic vibrator 24 irradiates ultrasonic waves in the cleaning liquid 13. Then, by causing pressure fluctuation, a vacuum cavity is formed in the cleaning liquid 13. The cavity is crushed and disappears by the next pressure vibration, and when the crushing occurs, the torn cleaning liquids 13 violently collide with each other and generate a very large impact force. This is the cavitation phenomenon, whereby the residue and particles of the solid matter 12 adhered to the cylindrical basket 2, the through holes 4 or the openings of the filter cloth 3 or the gap between the cylindrical basket 2 and the filter cloth 3. The attached matter is physically peeled off, and is separated and emulsified and released. Also, due to this cavitation phenomenon, small bubbles are generated in the cleaning liquid 13, which penetrate into the cylindrical basket 2, the through holes 4, or the gap between the cylindrical basket 2 and the filter cloth 3, and have the effect of repeating expansion and contraction. Then, the residue of the solid matter 12 and other deposits attached thereto are completely peeled and removed. In addition, the ultrasonic vibrator 24 irradiates the cleaning liquid 13 with ultrasonic waves so that the cleaning liquid 13 is agitated, and the residue of the solid substance 12 separated from the cylindrical basket 2, the filter cloth 3, and the like, and other deposits. Can be dissolved, emulsified, or dispersed in the washing liquid 13, so that the residue and the attached matter can be prevented from re-adhering to the cylindrical basket 2 and the filter cloth 3. After a certain period of time, the operation of the ultrasonic vibrator 24 is stopped, and the valve 2
2 is opened, and the cleaning liquid 13 is discharged. Thus, the above-described operation of the ultrasonic vibrator 24 completes the step of removing the residue of the solid 12 and other attached matter.

During the step of removing the residue, particles and other deposits of the solid matter 12, if the variable speed motor 11 is driven to rotate and the cylindrical basket 2 is rotated at a low speed,
The inside of the washing liquid 13 is further stirred, and the effect of removing the residue and the like of the solid matter 12 over the entire circumference is promoted. This is the step of removing residues and the like attached to the cylindrical basket 2 or the filter cloth 3 by the ultrasonic vibrator 24. The dewatering step, the scraping step, the spray cleaning step and the immersion, and the ultrasonic cleaning step in Embodiment 1 of the above-described centrifuge and the cleaning method according to the present invention only supply an electric signal to the centrifuge. It is also possible to carry out cleaning in place (CIP) and to perform unattended cleaning by automation.

The ultrasonic vibrator 24 is provided with the cleaning liquid 1.
If the operation is performed when there is no liquid such as 3, an overcurrent flows in the main body, which may cause damage or burning of the ultrasonic vibrator 24. Therefore, the ultrasonic vibrator 24 has an overcurrent countermeasure function so as not to operate the ultrasonic vibrator 24 when there is no cleaning liquid 13 in conjunction with the level detector. 2 to 5, an example is shown in which the step 1d is provided on the bottom 1a of the casing 1, but depending on the thickness of the casing 1, the ultrasonic vibration surface 24a and the porous bubble generating plate 28. Is appropriately selected, for example, by eliminating the stepped portion 1d and by raising the mounting portion of the ultrasonic vibration surface portion 24a or the porous bubble generating plate 28.

[0027]

Second Embodiment FIG. 3 shows an embodiment of a second embodiment of the centrifugal separator according to the present invention.
FIG. 3 is an enlarged cross-sectional view showing a state in which a bubble generator 30 is attached to a portion of a bottom portion 1a of the casing 1 in which air bubbles are stored. FIG. 4 is an enlarged perspective view in which the bubble generator 30 shown in FIG. 3 is disassembled. This will be described below with reference to FIGS.

Numeral 30 denotes a bubble generator which is fitted and fixed in a perforated hole 1c formed in the bottom 1a of the casing 1 and comprises, for example, a porous bubble generating plate 28 and a compressed air blowing device 29. The upper end of the compressed air sprayer 29 is the flange 2
9b, the peripheral edge of the flange 29b is provided with the same number of screw holes 29a as the screw holes 28a provided in the peripheral edge of the porous bubble generating plate 28. Further, the compressed air spraying tool 29 includes the flange 29b, the body 29
c and an air pipe portion 29d.
“c” has a middle projection, and blows the compressed air sent from the air pipe portion 29 d in the direction of the arrow P to the back surface of the porous bubble generating plate 28. The porous air bubble generating plate 28 is formed through a large number of fine holes 28b on the entire surface, and the compressed air blown from the compressed air blowing device 29 is blown out to the cleaning liquid 13 so that the fine air Bubble 13a
Generate. The porous bubble generating plate 28 is composed of, for example, a porous sintered metal plate, a porous ceramic plate, a porous resin plate, or the like. The lower edge of the perforated hole 1c forms a step portion 1d. The step portion 1d fixes the bolt 1e in a hanging manner. And the said bubble generator 30 is the said casing 1
It faces the washing liquid 13 stored therein.

The procedure for mounting the bubble generator 30 on the bottom 1a of the casing 1 will be described. The porous bubble generating plate 28 and the compressed air are inserted into the perforated hole 1c from below the bottom 1a of the casing 1. The flange 29b of the spraying tool 29 is inserted, and the packing 34 and the flange 35 are further overlapped from below. The surface of the porous bubble generating plate 28 is set so as to be flush with the upper surface of the bottom 1a of the casing 1. The flat head screw rod 31 is inserted into the screw holes 28a, 29a, the packing 34, and the screw holes provided in the flange 35 from above the bottom 1a. At the same time, the bolts 1e are inserted into the screw holes of the packing 34 and the flange 35 provided at different positions. By screwing the flat head screw rod 31 and the bolt 1e with the nuts 32 and 36,
The bubble generator 30 is mounted on the casing 1.

The other configuration of the centrifugal separator according to the second embodiment of the present invention is the same as that of the above-described first embodiment, and the description thereof will be omitted. Next, the operation of the centrifugal separator and the cleaning method according to the second embodiment will be described.
From undiluted solution supply process to scraping process, and spray cleaning process,
Since the immersion step is the same as that of the first embodiment, the description is omitted. Therefore, a process of removing the residue of the solid 12 when the bubble generator 30 is used will be described. As shown in FIG. 4, when compressed air is blown from the air pipe portion 29d of the compressed air blowing device 29 as shown by the arrow P, the compressed air flows through the body portion 29c and the porous bubble generating plate 2
8 is sprayed on the back surface. As shown in FIG. 3, the porous air bubble generating plate 28 blows out compressed air into the cleaning liquid 13 to cause the fine air bubbles 13a to collectively and continuously flow. Cleaning liquid 13
Each of the microbubbles 13a clustered therein bursts and disappears due to the pressure of the subsequent compressed air or the like. When the microbubbles 13a burst, the cleaning liquids 13 collide violently, and a large impact pressure is generated. The impact force is applied to the cylindrical basket 2, its through-holes 4, the openings of the filter cloth 3, and the residue of the solid matter 12 adhered to the gap between the cylindrical basket 2 and the filter cloth 3, and other deposits such as particles. Are separated from them. As described above, the residue and the attached matter of the solid matter 12 can be removed. Thus, the operation of the bubble generator 30 described above completes the step of removing the residue of the solid 12.

During the process of removing the residue, particles and other deposits of the solid matter 12, the variable speed motor 11 is driven to rotate at a low speed, and the cylindrical basket 2 is rotated.
The inside of the cleaning liquid 13 is further stirred, and the effect of removing the residue and the like of the solid substance 12 is promoted. This is the step of removing the residue and the like attached to the cylindrical basket 2 or the filter cloth 3 by the bubble generator 30 over the entire circumference. In the second embodiment of the present invention, as in the first embodiment, the in-place cleaning (CIP) is performed from the dewatering step to the step of removing residues and the like, and unmanned cleaning can be performed by automation.

[0032]

Third Embodiment FIG. 5 shows an embodiment of a third embodiment of the centrifugal separator according to the present invention.
FIG. 4 is an enlarged cross-sectional view showing a state where the ultrasonic vibrator 24 and the bubble generator 30 are attached to a portion of the bottom 1a of the casing 1 in which the air is stored.

Hereinafter, description will be made with reference to FIG. The ultrasonic vibrator 24 is fitted and fixed in a perforated hole 1c formed in the bottom 1a of the casing 1. The bubble generator 30 is juxtaposed with the ultrasonic vibrator 24, and is fitted and fixed in a perforated hole 1c formed in the bottom 1a of the casing 1. Then, the porous bubble generating plate 28 of the bubble generator 30 and the ultrasonic vibrating surface portion 24 of the ultrasonic vibrator 24
The upper surface of a is set flush with the bottom 1 a of the casing 1 and faces the cleaning liquid 13 stored in the casing 1. The procedure for mounting the bubble generator 30 and the ultrasonic vibrator 24 in the perforated hole 1c of the casing 1 and the detailed structure in the third embodiment are detailed in the first and second embodiments. The description is omitted here.

Next, the operation of the centrifuge according to the third embodiment and the cleaning method will be described. The steps from the stock solution supply step to the scraping step, the spray cleaning step, and the immersion step are the same as those in the above-described first and second embodiments, so that the description thereof is omitted. In addition, when the ultrasonic vibrator 24 and the bubble generator 30 are used, the step of removing the residue of the solid 12 and other attached matter is performed by the ultrasonic vibrator 24 described in the first embodiment of the present invention. This is a process when the operation and the cleaning method and the operation and the cleaning method of the bubble generator 30 described in the second embodiment of the present invention are performed at the same time, and the description thereof will be omitted. According to the residue removing step according to the third embodiment of the present invention, the residue removing function is further improved as compared with the first or second embodiment of the present invention. In particular, residues that are difficult to peel off from the adherend are removed. It is effective to use a centrifugal separator when the amount of washing solution is reduced.

Although the centrifugal separator and the washing method according to the present invention have been described in the case where the centrifuge is a horizontal type as described above, the present invention can also be applied to a vertical type centrifuge. . In the case of a vertical centrifuge, the cylindrical basket and the like are washed with the washing liquid being filled in the casing. In addition, the centrifuge and the washing method according to the present invention have been described in which the filter cloth is disposed on the inner surface of the peripheral wall of the cylindrical basket, but the filter cloth is not disposed on the peripheral wall of the cylindrical basket. The present invention can be applied to the case of forming a pore or a slit. Further, the centrifuge and the cleaning method according to the present invention can be applied to the case of cleaning semiconductor materials and chemicals other than foods and pharmaceuticals.

[0036]

The centrifuge and the washing method according to the present invention have the above-described structure and operation, and therefore have the following effects.

According to the first aspect of the present invention, a casing, a cylindrical basket having a large number of through holes in a peripheral wall portion provided in the casing, a filter cloth disposed on an inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. A centrifugal separator, wherein a washing liquid for immersing the washing liquid is stored in the casing, and an ultrasonic vibrator is attached to a portion of the casing where the washing liquid is stored. With such a configuration, based on the cavitation effect of the ultrasonic vibrator or the effect of removing particles due to air bubble rupture, the aperture of the through-hole or filter cloth of the cylindrical basket or the cylindrical basket and the filter cloth. It is possible to completely remove deposits such as solid residues and particles adhered to the gaps in the gaps and prevent re-adhesion, and it can be applied to cleaning equipment for foods, pharmaceuticals, semiconductor materials, and chemicals. . Cleaning in place (CIP)
To perform an efficient cleaning by unmanned operation by automation.

According to the second aspect of the present invention, the casing, the cylindrical basket having a large number of through holes in the peripheral wall portion installed in the casing, the filter cloth disposed on the inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. A centrifugal separator characterized in that a washing liquid for immersing the washing liquid is stored in the casing, and a bubble generator is attached to a portion of the casing where the washing liquid is stored. With this configuration, fine bubbles generated by the bubble generator penetrate into the gap between the layer of solid residue and deposits and the surface of the through hole of the cylindrical basket and the opening of the filter cloth. In addition, by repeating the expansion and contraction, the layer of the residue and the attached matter is peeled off, and the residue in the cylindrical basket or the through hole or the opening portion or the gap between the cylindrical basket and the filter cloth can be completely removed. In addition, re-adhesion can be prevented.

According to the third aspect of the present invention, the casing, the cylindrical basket having a large number of through holes in the peripheral wall portion provided in the casing, the filter cloth disposed on the inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. A centrifugal separator characterized in that a washing liquid for immersing the washing liquid is stored in the casing, and an ultrasonic vibrator and a bubble generator are mounted on a portion of the casing where the washing liquid is stored. Because of such a configuration, the ultrasonic vibrator and the bubble generator allow the solid basket to adhere to the cylindrical basket, the through hole, the opening of the filter cloth, or the gap between the cylindrical basket and the filter cloth. This is effective for further removing the residue and the like which are difficult to peel off, and can reduce the amount of the cleaning liquid.

According to the fourth aspect of the present invention, the centrifugal separator according to any one of the first to third aspects, wherein the ultrasonic vibrator or the bubble generator is mounted flush with a portion of the casing. I will provide a. With such a configuration, the ultrasonic vibrator or the bubble generator functions efficiently in the cleaning liquid due to the cavitation effect and the bubble generation action,
Also, by flushing the cleaning waste liquid with the casing, the cleaning liquid can be completely discharged without remaining on the surface of the ultrasonic vibrator or the bubble generator at the time of discharging the cleaning waste liquid. It can be further improved.

According to the fifth aspect of the present invention, the casing, the cylindrical basket having a large number of through holes in the peripheral wall provided in the casing, the filter cloth disposed on the inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. The washing liquid to be immersed is stored in the casing, and while the basket is being rotated at a low speed, the cavitation effect by the ultrasonic vibrator attached to the part of the casing where the washing liquid is stored,
A method for cleaning a centrifuge, comprising removing a residue attached to the basket or the filter cloth. With such a configuration, based on the cavitation effect of the ultrasonic vibrator or the effect of removing particles due to air bubble rupture, the aperture of the through-hole or filter cloth of the cylindrical basket or the cylindrical basket and the filter cloth. In addition to providing a cleaning method for completely removing solid residues and deposits adhering to the gaps, a method for performing efficient cleaning by automation by performing in-place cleaning (CIP) can also be provided.

According to the sixth aspect of the present invention, the casing, the cylindrical basket having a large number of through holes in the peripheral wall portion provided in the casing, the filter cloth disposed on the inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. Is stored in the casing, and while the basket is being rotated at a low speed, the bubbles adhered to the basket or the filter cloth by the action of the bubbles generated by the bubble generator attached to the part of the casing where the washing liquid is stored. And a method for washing a centrifuge, wherein With such a configuration, the fine bubbles generated by the bubble generator penetrate into the gap formed between the layer of the solid residue and the surface of the opening of the cylindrical basket or the opening of the filter cloth, Washing by repeating the expansion and contraction to peel off the layer of the residue and the attached matter, and completely remove the residue and the like attached to the cylindrical basket or the through hole or the opening or the gap between the cylindrical basket and the filter cloth. A method can be provided.

According to the seventh aspect of the present invention, the casing, the cylindrical basket having a large number of through holes in the peripheral wall portion provided in the casing, the filter cloth disposed on the inner surface of the basket, In a centrifuge provided with a scraping device for scraping solid matter deposited on the surface of the filter cloth, the basket and the filter cloth are used to wash the filter cloth and basket after scraping the solid matter. The washing liquid to be immersed is stored in the casing, and while the basket is being rotated at a low speed, the cavitation effect by the ultrasonic vibrator attached to the part of the casing where the washing liquid is stored and the action of bubbles by the bubble generator are used. A method for cleaning a centrifuge, comprising removing a residue attached to a basket or a filter cloth. With such a configuration,
The ultrasonic vibrator and the bubble generator further enhance the effect of removing solid residues adhered to the through holes of the cylindrical basket or the openings of the filter cloth and the gap between the cylindrical basket and the filter cloth, and peel off. It is possible to provide a cleaning method that is effective for completely removing difficult residues and the like and that can reduce the amount of cleaning liquid.

According to the invention as set forth in claim 8, the centrifugal separator according to claim 5, 6 or 7, wherein the ultrasonic vibrator or the bubble generator is mounted flush with the casing. The present invention provides a method of cleaning. With such a configuration, the ultrasonic vibrator or the bubble generator functions efficiently in the cleaning liquid due to the cavitation effect and the bubble generation action, and the cleaning waste liquid is flush with the casing portion. The cleaning liquid can be completely discharged without remaining on the surface of the ultrasonic vibrator or the bubble generator at the time of discharging, and a cleaning method that further improves the effect of removing the residue and the attached matter can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a main part showing a first embodiment of a centrifuge according to the present invention.

FIG. 2 is an enlarged sectional view showing a state in which an ultrasonic vibrator applied to the first embodiment of the centrifuge according to the present invention is mounted on a casing.

FIG. 3 is an enlarged cross-sectional view showing a state in which a bubble generator applied to a second embodiment of the centrifuge according to the present invention is mounted on a casing.

FIG. 4 is an enlarged exploded perspective view of a bubble generator applied to a second embodiment of the centrifuge according to the present invention.

FIG. 5 is an enlarged sectional view showing a state in which an ultrasonic vibrator and a bubble generator applied to a third embodiment of the centrifuge according to the present invention are mounted on a casing.

FIG. 6 is a cross-sectional side view of a main part showing a structural example of a horizontal centrifuge according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 1a Bottom part 1b Drainage port 1c Drilled hole 1d Step part 1e Bolt 2 Cylindrical basket 3 Filter cloth 4 Through hole 5 Peripheral wall part 6 Side wall 7 Cover plate 8, 9 Cleaning liquid pipe 8a, 9a Injection liquid 8b, 9b nozzle 10 Solid discharge short-circuit 10a Opening 10b Take-out port 11 Variable speed motor 12 Solid (cake) 13 Cleaning liquid 14 Support base 15 Back side wall 16 End wall 17 Rotary shaft 18 Rotating belt 19 Bearing device 19a Bearing 20 Drive cover 21 Stock solution supply Pipe 22 Valve 23 Discharge pipe 24 Ultrasonic vibrator 24a Ultrasonic vibrating surface part 24b Screw rod 24c Bolt 25a, 25b Nut 26 Packing 27 Flange 28 Porous bubble generating plate 28a Screw hole 28b Micro hole 29 Compressed air blower 29a Screw stop Hole 29b Flange 29c Body 29d Air tube 3 0 Bubble generator 31 Flat head screw rod 32, 36 Nut 33 Lead wire 34 Packing 35 Flange

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) B08B 3/12 B08B 3/12 A (72) Inventor Minoru Sugiura 2--17-15 Tsukuda, Chuo-ku, Tokyo Tsukishima Kikai Co., Ltd. (72) Inventor Hirokazu Nagase 2-17-15 Tsukuda, Chuo-ku, Tokyo F-term (reference) 3B201 AA47 AB53 BA03 BB21 BB83 BB88 BB94 CA05 CB22 4D057 AA01 AA03 AB01 AC02 AD01 AE03 AF01 BA17 BA36 BA43 BC05 BC11 BC15

Claims (8)

[Claims] 1. A casing, a cylindrical basket having a plurality of through holes in a peripheral wall portion provided in the casing, a filter cloth disposed on an inner surface of the basket, and a filter cloth deposited on the surface of the filter cloth. In a centrifuge provided with a scraping device for scraping solids, when washing the filter cloth and the basket after scraping the solids, a washing liquid for immersing the basket and the filter cloth is washed in the casing. A centrifugal separator, wherein an ultrasonic vibrator is attached to a portion of the casing where the washing liquid is stored. 2. A casing, a cylindrical basket having a plurality of through holes in a peripheral wall portion provided in the casing, a filter cloth disposed on an inner surface of the basket, and a filter cloth deposited on the surface of the filter cloth. In a centrifuge provided with a scraping device for scraping solids, when washing the filter cloth and the basket after scraping the solids, a washing liquid for immersing the basket and the filter cloth is washed in the casing. A centrifugal separator, wherein a bubble generator is attached to a portion of a casing in which the washing liquid is stored. 3. A casing, a cylindrical basket having a large number of through holes in a peripheral wall portion installed in the casing, a filter cloth disposed on an inner surface of the basket, and a filter cloth deposited on the surface of the filter cloth. In a centrifuge provided with a scraping device for scraping solids, when washing the filter cloth and the basket after scraping the solids, a washing liquid for immersing the basket and the filter cloth is washed in the casing. A centrifugal separator, wherein an ultrasonic vibrator and a bubble generator are attached to a portion of the casing where the cleaning liquid is stored. 4. The centrifuge according to claim 1, wherein the ultrasonic vibrator or the bubble generator is mounted flush with a portion of the casing. 5. A casing, a cylindrical basket provided in the casing with a plurality of through holes in a peripheral wall portion, a filter cloth disposed on an inner surface of the basket, and a filter cloth deposited on the surface of the filter cloth. In a centrifuge provided with a scraping device for scraping solids, when washing the filter cloth and the basket after scraping the solids, a washing liquid for immersing the basket and the filter cloth is washed in the casing. And removing the residue attached to the basket or the filter cloth by the cavitation effect of the ultrasonic vibrator attached to the portion of the casing where the cleaning liquid is stored while rotating the basket at a low speed. How to wash the centrifuge. 6. A casing, a cylindrical basket having a plurality of through holes in a peripheral wall portion installed in the casing, a filter cloth disposed on an inner surface of the basket, and a filter cloth deposited on the surface of the filter cloth. In a centrifuge provided with a scraping device for scraping solids, when washing the filter cloth and the basket after scraping the solids, a washing liquid for immersing the basket and the filter cloth is washed in the casing. And removing the residue adhering to the basket or the filter cloth by the action of air bubbles by an air bubble generator attached to a part of the casing where the washing liquid is stored while rotating the basket at a low speed. How to wash the centrifuge. 7. A casing, a cylindrical basket having a plurality of through holes in a peripheral wall portion provided in the casing, a filter cloth disposed on an inner surface of the basket, and a filter cloth deposited on the surface of the filter cloth. In a centrifuge provided with a scraping device for scraping solids, when washing the filter cloth and the basket after scraping the solids, a washing liquid for immersing the basket and the filter cloth is washed in the casing. Stored in the basket, while rotating the basket at a low speed, by the action of the cavitation effect by the ultrasonic vibrator attached to the part of the casing where the cleaning liquid is stored and the action of the bubbles by the bubble generator,
A method for cleaning a centrifuge, comprising removing a residue attached to the basket or the filter cloth. 8. The method for cleaning a centrifuge according to claim 5, wherein the ultrasonic vibrator or the bubble generator is mounted flush with a portion of the casing.