JPH10192736A - Centrifugal seperator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide multifunction, excellent workability and maintainability and also to lower costs. SOLUTION: This separator is constituted so that solid matter may be centrifugally separated from solid matter containing raw water. In this case, with a moving body 20 moved on the side of an injection part 11 together with a filter membrane 23, a clutch is made in a contact state to link with a main shaft 4 and a driven shaft 5. While they are driven, raw water is led to one surface side of the filter membrane 23 from the injection port 11, and is centrifugally separated by the linked rotation of a linked drum body 14 and the moving body 20 to discharge the raw water and collect the solid matter to the filter membrane 23. And the clutch 3 is made in an off state to stop the linking with the main shaft 4 and the driven shaft 5, and by using a different in revolution between the main shaft 4 and the driven shaft 5, the moving body 20 linked with a screwed pin 18 is moved to the side of a vertical wall 1a to reverse the filter membrane inside out. After the filter membrane 23 is reversed inside out, the clutch 3 is made in a contact state to link the main axis 4 and the driven axis 5 to drive them, and solid matter stuck to one surface of the filter membrane 2 reversed inside out is removed outward of a lot of withdrawal holes 15 of the drum body 14 by centrifugal separation.

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 separating solids from raw water by the action of centrifugal force and filtration.

[0002]

2. Description of the Related Art In recent years, there has been a need for technical measures to solve water pollution due to severe water shortages and environmental degradation. In particular, the development of technology to cope with a sudden water shortage due to an earthquake or the like is required.

On the other hand, the technology of water reuse is advanced, and there are devices for converting pool water into emergency drinking water and devices for purifying and reusing factory wastewater. However, this device is large,
Expensive and requires specialized maintenance. There is a need for technologies that are more easily spread.

[0004] For example, from raw water containing solid matter such as blue-green algae,
A centrifugal separator has been put to practical use as a device for separating solids, but in the case of this conventional device, since a filter is used, there is a fatal problem of clogging of the filter. That is, the filter is gradually clogged, and the connected machine is suddenly stopped. Therefore, it is necessary to periodically and early replace the filter or to manually remove the solid matter attached to the filter.

[0005] For this reason, the cost is enormous depending on the degree of treatment and purification of a large amount of raw water. However, if the raw water is heavily contaminated, it cannot be treated, leading to environmental degradation.
Since this causes plagues and infectious diseases, it is impossible to leave it alone.

[0006] The problem is how to operate the filter pretreatment at low cost without specialized technology or support, and whether the device can be processed by sorting the removed components. There is no device for processing.

That is, when there is a device for classifying raw water into water and solid matter, whether to use or discard (whether or not to reuse) the classified water depends on the classification ratio, and the form of the device is as follows. Although it changes drastically, there is no machine that can be expanded from simple filters to food dehydration processing equipment, etc. (it will become a plant).

[0008] Therefore, for example, raw water at the time of disaster may have unstable water quality, and if a device capable of first removing blue-green algae, mud, and refuse is required, enormous cost is required.

[0009] As a method of purifying a pond whose transparency has deteriorated due to blue-green algae or the like, a method is known in which dirt is collected and settled with a flocculant. However, the transparency of the pond deteriorates again in a few days to several months due to water pollution of the pond.

[0010] This means that there is no efficient method for removing aggregates. For example, clogging occurs immediately if performed by a filtration device, and a dehydration device is planted and cannot be transported very close to a pond, resulting in large costs.

A small and inexpensive processing device is necessary for pond purification, and if it is provided, it can improve the environment of the pond and contribute to drinking countermeasures in the event of a disaster.

[0012] For example, as a solution, back washing in which the solid matter of filtration is removed from the filter membrane can be considered. However, since a large amount of water is given to the solid matter, the solid matter cannot be processed without being solidified.

The dehydrator has a device for squeezing out water by compression or centrifugation to convey solids, but it requires a great deal of labor and cost to purify the pond on site.

Therefore, a technique for removing solids, a technique for removing solids from the filter membrane, a technique for washing the filter membrane, and a technique for transporting the filter are required at a minimum. A device is required, and the appearance of such a device is desired.

[0015]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has a multifunctional centrifugal separator which is excellent in workability and maintainability, and which can reduce the cost. The purpose is to provide.

[0016]

According to the first aspect of the present invention,
A centrifugal separator for centrifuging the solid matter from raw water containing the solid matter, comprising a horizontal drive source having a horizontally arranged main shaft, a clutch connected to the drive source, and a clutch connected to the clutch. A drive unit housing mounted with a hollow slave shaft disposed on the outer periphery of the main shaft, and the main shaft and the hollow slave shaft protruding laterally from one vertical wall; and a raw water containing the solid matter. A raw water injection chamber having an inlet opening at one end, a drain port below the inlet, and the other end detachably attached to one vertical wall of the drive unit housing; A screw body having a screw on an outer periphery integrally attached to a horizontally arranged main shaft extending to a vicinity of the inlet with respect to a main shaft protruding into the chamber, and attached to a slave shaft protruding into the raw water injection chamber, One side of the drive housing A drum body having a closed wall, the inlet side being open and having a filter membrane mounting portion at the opening, and a cylindrical body having a number of holes formed in the cylindrical part, and a threaded body of the raw water injection chamber. A hollow body that is arranged on the outer periphery and that is interlocked with a slave shaft protruding into the raw water injection chamber is movably mounted in the axial direction of the hollow body, and is screwed through an elongated hole in the axial direction provided in the hollow body. A pin, which is screwed into the screw body, and which moves in the axial direction of the screw body in conjunction with a change in the position of the screw pin due to the rotation of the screw body. A moving body having a small-diameter disc-shaped raw water flow hole, and a filter membrane stretched between an outer peripheral portion of the moving body and a filter membrane mounting portion of the drum body; With the film moved to the inlet side together with the membrane, the clutch is brought into contact with the main spindle. The raw water from the inlet is guided to one surface side of the filter membrane through the communication hole while being driven in conjunction with the slave shaft, and centrifugal separation is performed by rotation of the drum and the moving body in conjunction with each other to perform raw water. The discharge from the drain port and the collection of the solid matter on the filter membrane are executed, the clutch is disengaged, the interlocking of the main shaft and the slave shaft is stopped, and the difference between the rotational speeds of the main shaft and the slave shaft is reduced. Utilizing the moving body linked to the screw pin to the vertical wall side of the screw body to perform the upside down of the filter membrane, after the upside down of the filter membrane, the clutch in contact state The main shaft and the slave shaft are driven in conjunction with each other to remove solid matter adhering to one surface of the inverted filter membrane by centrifugal separation outside a number of holes in the drum body. It is.

According to a second aspect of the present invention, in the centrifugal separator according to the first aspect, a sensor for detecting approach of the moving body is provided near an inlet of the raw water injection chamber, and the movement by the sensor is provided. The position of the moving body is regulated by stopping the driving source in response to a body approaching signal.

According to a third aspect of the present invention, in the centrifugal separator according to the first or second aspect, a required number of brushes are arranged around the outer periphery of the cylindrical portion of the drum, and the drum is used to form the drum. The cleaning is performed on the surrounding member surrounding the outer periphery.

According to a fourth aspect of the present invention, there is provided the centrifugal separator according to any one of the first to third aspects, wherein washing water is injected into the inlet, and centrifugal separation is performed by the rotation of the drum and the moving body in conjunction with each other. To wash the filter membrane.

Hereinafter, the present invention will be described in more detail.

As can be seen from the structure of the first aspect of the present invention, a bag-shaped raw water contaminated with water moss is stretched between an outer peripheral portion of the moving body and a filter membrane mounting portion of the drum body. When the raw water is rotated in the filtration membrane, the liquid of the raw water passes through the filtration membrane due to the centrifugal force acting on the filtration membrane, and the solid matter contained in the raw water adheres to the bag-shaped filtration membrane. In this state, if the bag-like filter is turned upside down and a centrifugal force is applied to the filter, the solids are blown outward and discharged out of the drum.

By utilizing the filtration step by centrifugal force, the step of turning over the bag-like filter membrane, and the step of removing solids by centrifugal force, purification of raw water contaminated by one apparatus can be achieved. Solids can be removed.

Further, as can be seen from the structure of the invention according to claim 4, washing water is put into the bag-shaped filter membrane which is turned upside down,
The filter membrane can be washed by centrifugal force. This can eliminate clogging of the filter membrane. In this way, the contaminated raw water has a water purification function and a dehydration function, and can exhibit an automatic cleaning function of the filter membrane.

Further, as can be seen from the structure of the first aspect of the present invention, the structure of the drive unit housing includes a horizontal drive source and a clutch, and the raw water injection is detachably attached to the drive unit housing. In the room, the screw body directly connected to the main shaft driven by the drive source and the hollow body connected via the slave shaft to the clutch have a cantilever support structure, so that the bearing structure is simplified and raw water is injected. An injection port is provided at one end of the chamber to guide the raw water into the raw water injection chamber, so that the structure of the centrifugal separator can be simplified and downsized, and the maintainability can be further facilitated.

According to the second aspect of the present invention, the position of the movable body is controlled by stopping the drive source in accordance with the approach signal of the movable body by the sensor. The state of excessive movement to the side can be eliminated, and the reliability of the operation can be improved.

According to the third aspect of the present invention, the surrounding member surrounding the outer periphery of the drum body can be cleaned by the brush body, and the surrounding member in the raw water injection chamber can be kept clean. .

[0027]

Embodiments of the present invention will be described below in detail.

FIG. 1 is a schematic sectional view of a centrifugal separator according to an embodiment of the present invention.

This centrifugal separator is a device for centrifuging the solid matter from raw water containing the solid matter. The centrifugal separator includes a motor 2 which is a horizontal drive source having a main shaft 4 arranged horizontally, and a clutch 3 connected to the motor 2.
And the main shaft 4 connected to the clutch 3
The drive unit housing 1 having a hollow slave shaft 5 disposed on the outer periphery of the main body 4 and the main shaft 4 and the hollow slave shaft 5 protruding laterally from one vertical wall 1a; An injection port 11 defined by an injection frame 11a for injecting the raw water containing the water is opened at one end, and a drain port 12 is provided below the injection port 11;
A raw water injection chamber 10 having the other end side detachably attached to one of the vertical walls 1 a of the drive unit housing 1, and a horizontally disposed main shaft 4 protruding into the raw water injection chamber 10, and the injection port 1.
1 and a screw body 13 having a thread on the outer periphery integrally attached thereto over a range extending to the vicinity of the drive shaft 1 and attached to the driven shaft 5 projecting into the raw water injection chamber 10. The vertical wall side 1a is closed, and the injection port 11 is closed.
A drum body 14 having a cylindrical opening having a filter membrane mounting portion 14a in the opening and having a large number of holes 15 formed in the cylindrical portion; and a drum body 14 as shown in FIG.
The raw water injection chamber 10
Hollow cylindrical hollow body 16 interlocking with slave shaft 5 projecting into
And a moving body 20 mounted movably in the axial direction.

As shown in FIG. 1, the moving body 20 includes, for example, two screw pins 18 that penetrate an elongated hole 17 provided in the hollow body 16 in the axial direction. 13 is provided with a movable body base 20a which can be screwed to the screw member 13 and move in the axial direction of the screw body 13 in conjunction with a change in the position of the screwing pin 18 accompanying the rotation of the screw body 13. The mobile body base 20a has a flow hole 1 through which raw water can flow.
9 is mounted in a position orthogonal to the hollow body 16 using bolts and nuts,
A shielding disk 22 for preventing entry of raw water from the inlet 11 is attached to an outer peripheral portion of the disk 21 using bolts and nuts.

Further, in this centrifugal separator, a filtration membrane (bag-shaped filter) 23 is provided between the outer peripheral portion of the disk 21 of the moving body 20 and the filtration membrane mounting portion 14a of the drum body 14 in raw water. It is stretched so as to partition the inside of the injection chamber 10. Disk 2
1 is attached to the outer periphery of the filter membrane 23 using bolts and nuts, and the filter membrane 23 is provided between the filter membrane mounting section 14a and the holding plate 14b with respect to the filter membrane mounting section 14a. Holding plate 14 with bolts and nuts
b is attached to the filter membrane attachment portion 14a.

Below the injection port 11 of the drum body 14,
The moving body 20 with respect to the outer wall material 10a of the raw water injection chamber 10
Sensor (for example, an ultrasonic sensor) for detecting approach of a vehicle 2
5 are arranged. A required number of brushes 26 made of the same material as, for example, a car wash brush are attached to the outer periphery of the drum body 14. This brush 2
The protruding end of 6 abuts on the inner surface of the surrounding member 27 that constitutes the raw water injection chamber 10 outside the drum body 14 to enable cleaning of the inner surface of the surrounding member 27 as the drum body 14 rotates.

A solid discharge member 29 having a hole 28 is disposed below the drum body 14. One end of the solid discharge member 29 is connected to the frame member 12a of the discharge port 12.
And attached to the vertical wall 1a of the drive unit housing 1 using screws.

In FIG. 1, 31 is an upper frame of the raw water injection chamber 10, 12b is a drain guide mounted on the frame member 12a of the outlet 12, and 32 is mounted on a protruding end of the hollow body 16. It is a protective cover. Outer wall material 10a and upper frame 31, upper frame 31, and surrounding member 27 of raw water injection chamber 10
Are attached using bolts and nuts, respectively, and the surrounding member 27 is screwed to the vertical wall 1a of the drive unit housing 1.

The raw water injection chamber 10 is constructed by attaching a protection plate 32 to the vertical wall 1a of the drive unit housing 1.

Next, the drive unit housing 1 will be further described.

The drive unit housing 1 includes a frame 40 having a support plate 41 for supporting the motor 2 and the bearings 42 and 43 of the main shaft 4 and the sub shaft 5.

The clutch 3 has a first clutch plate 45 connected to a main shaft 4 connected to the motor 2 via a first connection flange 44, and a second connection to the slave shaft 5. A second clutch plate 47 connected via a flange 46, and a clutch operating portion 48 for bringing the first clutch plate 45 and the second clutch plate 47 into a "connected" or "disengaged" state by, for example, an electromagnetic force. Is provided.

A pump 51 and a pump motor 52 are disposed inside the drive unit housing 1.
The suction pipe 53 is attached to the suction side of the pump 51, and the discharge pipe 54 is attached to the discharge side of the pump 51. The discharge end of the discharge pipe 54 faces the inlet 11.

FIG. 3 is a block diagram showing a control system of the centrifugal separator of the present embodiment. The sensor 25 is connected to a control unit 60 for controlling the entire operation, and the motor 2 is connected to the control unit 60. , A clutch driving unit 62 for driving the clutch 3, a pump motor driving unit 63 for driving the pump motor 52, a start switch 64 and a clutch switch 65, a pump switch 66, A speed changeover switch 67 for changing the rotation speed to a low speed is connected.

Next, the operation of the centrifugal separator having the above-described configuration will be described with reference to FIGS. 4 to 7 show the rotation operation of the motor 2, the “contact” or “disengagement” operation of the clutch 3, the rotation operation of the drum 14,
This conceptually illustrates a moving operation of the moving body 20 accompanied by inversion of the filter membrane 23.

First, as shown in FIG.
With the filter membrane 23 moved to the inlet 11 side,
The start switch 64 is operated, the clutch switch 65 is operated to bring the clutch 3 into the engaged (on) state, and the start switch 64 is operated to control the motor drive unit 61 under the control of the control unit 60. The motor 3 is started.

Further, a pump switch 66 is operated to start the pump 51 via the pump motor 52, and the raw water contaminated with blue moss is supplied to the inlet through the suction pipe 53, the pump 51 and the discharge pipe 54. Inject into 11. As a result, the raw water flows from the outer periphery of the hollow body 16 into the region surrounded by the filter membrane 23 through the circulation hole 19 of the disk 21, and further, the screw pin 18 is screwed into the screw body 13 interlocked with the main shaft 4. There is no difference in rotation speed (difference in rotation speed) between the screwed moving body 20 and the drum body 14 linked to the rotation of the slave shaft 5 according to the state of contact of the clutch 3. The raw water that has flowed into the enclosed area is blown to one side of the filter membrane 23 by the action of centrifugal force, the filter membrane 23 swells outward, and the water in the raw water permeates through the filter membrane 23 from the outlet 12. Discharged as purified water outside. The solids contained in the raw water adhere to one surface of the filter membrane 23.

Next, the clutch switch 65 is operated while the rotation of the motor 3 is continued, so that the clutch 3 is disengaged. As a result, the driving force for the slave shaft 5 is cut off, and the rotational speeds of the drum body 14 and the moving body 20 gradually decrease. Then, the screwing pin 1 is attached to the screw body 13.
As shown in FIG. 5, the moving body 20 with which the screw 8 is screwed moves in conjunction with the movement of the screwing pin 18 toward the vertical wall 1a due to the rotation of the main shaft 4 as shown in FIG. Then, as shown in FIG. 6, the filter membrane 23 is turned upside down in a state of approaching the vertical wall 1 a, and the solid matters face the inner surface of the drum body 14.

In this state, the clutch switch 65 is operated again to bring the clutch 3 into the engaged state. Then, the driving force for the slave shaft 5 is restored, and the drum body 14 and the moving body 20 rotate again in conjunction with each other, and the filter membrane 23 whose front and back are reversed.
A centrifugal force acts on the solid matter adhering to the drum, and this solid matter is discharged to the outside through the hole 28 of the solid discharge member 29 through the hole 15 provided in the drum body 14.

Thereafter, the clutch 3 is disengaged by operating the clutch switch 65, and the motor 2 is rotated at a low speed by the speed switch 67.

As a result, the driving force on the slave shaft 5 is cut off, and the rotational speeds of the drum body 14 and the moving body 20 gradually decrease, but the main shaft 4 and the screw body 13 are rotating at a low speed. Therefore, contrary to the above-described case, the moving body 20 in which the screwing pin 18 is screwed to the screw body 13 moves to the injection port 11 side as shown in FIG. Returning to the initial state, the filter membrane 23 also reverses and returns to the initial state.

In this case, the approach of the moving body 20 is detected by the sensor 25, and the control unit 6 receives the detection signal.
If the motor 2 is stopped under the control of 0, it is possible to eliminate the state in which the moving body 20 is excessively moved to the injection port 11 side, and to ensure the operation.

Further, as shown in FIG.
And then applying centrifugal force to wash the filter membrane 23 in an inverted state shown in FIG. 6, whereby the clogging of the filter membrane 23 can be eliminated. .

In this way, it is possible to realize an apparatus which has a function of purifying the contaminated raw water and a function of dewatering, and also exerts an automatic cleaning function of the filter membrane 23.

Further, the surrounding member 27 surrounding the outer periphery of the drum body 14 can be cleaned by the brush body 26, and the surrounding member 27 in the raw water injection chamber 10 can be kept clean.

Further, the structure of the drive unit casing 1 includes a horizontal motor 2 and a clutch 3, and is driven by the motor 2 in a raw water injection chamber 10 detachably attached to the drive unit casing 1. The screw body 13 directly connected to the main shaft 4 and the hollow body 16 connected to the clutch 3 via the shaft 4 are cantilevered, so that the bearing structure is simplified and one end of the raw water injection chamber 10 is provided. By providing an inlet 11 on the side, the raw water can be guided into the raw water injection chamber 10, so that the structure of the centrifugal separator can be simplified and downsized, and the maintainability can be further facilitated.

The centrifugal separator according to the present invention can be used to purify water from a pond contaminated with blue-green algae, to purify pool water in the event of an earthquake, to use part of a plant for recycling factory wastewater, or to substitute a dehydrator. Etc. can be used. In addition, the present invention can be applied as a food processing machine (squeezing machine) for tofu or the like, a place where a filter used in a factory is immediately cataloged, a substitute for an oil element, a filtration device in a vegetable juice manufacturing process, or the like.

[0054]

According to the present invention, there is provided a centrifugal separator capable of automatically purifying contaminated raw water and removing solids, having excellent workability and maintainability, and capable of reducing costs. can do. Further, it is possible to provide a centrifugal separator capable of eliminating clogging of the filter membrane.

Further, according to the present invention, it is possible to provide a centrifugal separator capable of ensuring the operation and maintaining the cleanliness of the raw water injection chamber.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a centrifugal separator according to the present embodiment.

FIG. 2 is an enlarged perspective view of a moving body of the centrifugal separator according to the present embodiment.

FIG. 3 is a block diagram illustrating a control system of the centrifugal separator according to the present embodiment.

FIG. 4 is an explanatory diagram conceptually showing the operation of the centrifugal separator of the present embodiment.

FIG. 5 is an explanatory view conceptually showing the operation of the centrifugal separator of the present embodiment.

FIG. 6 is an explanatory diagram conceptually showing the operation of the centrifugal separator of the present embodiment.

FIG. 7 is an explanatory view conceptually showing the operation of the centrifugal separator of the present embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive housing 2 motor 3 clutch 4 main shaft 5 slave shaft 10 raw water injection chamber 11 inlet 12 drain port 13 screw body 14 drum body 15 extraction hole 16 hollow body 18 screwing pin 20 moving body 23 filter membrane 26 brush 27 surrounding Member 51 Pump 52 Pump motor 53 Suction pipe 54 Discharge pipe

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yuichi Kato 164-35 Karibacho, Hodogaya-ku, Yokohama-shi, Kanagawa Prefecture Green Hills Yokohama D-201 (72) Inventor Kaoru Touri 3-24-1, Sakaiminamicho, Musashino-shi, Tokyo Stock All maintenance in company

Claims (4)

[Claims] 1. A centrifugal separator for centrifuging solid matter from raw water containing solid matter, comprising: a horizontal drive source having a horizontally arranged main shaft; a clutch connected to the drive source; And a driving unit housing mounted with a hollow slave shaft arranged on the outer periphery of the main shaft, and the main shaft and the hollow slave shaft projecting laterally from one vertical wall, An inlet port for injecting raw water containing solid matter is opened at one end, a drain port is provided below the inlet port, and the other end side is detachably attached to one vertical wall of the drive unit housing. A screw body having a screw on the outer periphery integrally attached to a horizontally arranged main shaft protruding into the raw water injection chamber over a range reaching the vicinity of the injection port; and a slave shaft protruding into the raw water injection chamber. Attach and drive A drum body having one vertical wall side closed, the inlet side being open, and a cylindrical body provided with a filter membrane mounting portion in the opening portion, and a plurality of holes formed in the cylindrical portion; The hollow body, which is arranged on the outer periphery of the screw body of the injection chamber and is linked to the slave shaft protruding into the raw water injection chamber, is mounted so as to be movable in the axial direction thereof, and the axial direction provided in the hollow body. A screw pin that penetrates the elongated hole, the screw pin is screwed into the screw body, and the screw pin moves in the axial direction of the screw body in conjunction with a change in position of the screw body due to rotation of the screw body. A moving body provided with a disc-shaped raw water flow hole having a diameter smaller than the inner diameter of the drum body, and a filter membrane stretched between an outer peripheral portion of the moving body and a filter membrane mounting portion of the drum body. Then, with the moving body moved to the inlet side together with the filter membrane, the clutch was engaged. In this state, the main shaft and the slave shaft are driven in association with each other, and the raw water from the inlet is guided to one surface side of the filter membrane through the circulation hole, and centrifugal separation is performed by the interlocking rotation of the drum and the moving body. Performing the discharge of raw water from the drain port and the collection of solids in the filter membrane, the clutch is disengaged and the interlock between the main shaft and the slave shaft is stopped, and the main shaft and the slave shaft are The moving body interlocking with the screw pin is moved to the vertical wall side of the screw body using the difference in the number of rotations to perform the inversion of the filter membrane. The main shaft and the slave shaft are driven in conjunction with each other in a contact state, and solid matter adhering to one surface of the filter membrane, which has been turned upside down, is removed by centrifugation outside the many holes in the drum body. A centrifugal separator characterized by the above-mentioned. 2. A sensor for detecting approach of the moving body is provided in the vicinity of the inlet of the raw water injection chamber, and the driving source is stopped by an approach signal of the moving body by the sensor to stop the driving body. 2. The centrifugal separator according to claim 1, wherein the position is regulated. 3. The drum body according to claim 1, wherein a predetermined number of brush bodies are arranged on the outer circumference of the cylindrical portion of the drum body, and the brush body cleans a surrounding member surrounding the outer circumference of the drum body. 3. The centrifugal separator according to 1 or 2. 4. The washing method according to claim 1, wherein washing water is injected into the injection port, and the filtration membrane is washed by centrifugal separation with rotation of the drum body and a moving body in conjunction with each other. The centrifugal separator according to any one of the above.