JP2003326195A - Vertical centrifugal separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical centrifugal separator which certainly washes the interior of a separation chamber and can efficiently reutilize a separated solid. <P>SOLUTION: The vertical centrifugal separator is equipped with an outer cylinder 1 rotatable around an axial line extending in an almost vertical direction, an inner cylinder 5 rotatable around the axial line in the outer cylinder, the screw blade 3 attached to the outer peripheral surface of the inner cylinder 5 and arranged so as to form a slight gap with respect to the inner wall surface of the outer cylinder 1, the supply pipe 39 provided in the inner cylinder 5 and supplying a slurry to be treated to the separation chamber S between the outer cylinder 1 and the inner cylinder 5, a planetary gear mechanism 3 connected to the lower ends of the outer and inner cylinders 1 and 5 to transmit the rotation of the outer cylinder 1 to the inner cylinder 5 to rotate the outer and inner cylinders 1 and 5 in the same direction so as to generate a predetermined difference in the number of rotations, a motor 35 for rotationally driving the inner cylinder 5 and an introducing pipe 59 piercing the planetary gear mechanism 43 to extend into the inner cylinder 5 and capable of ejecting a washing liquid or air to the solid separated in the separation chamber S from the inner wall of the inner cylinder 5. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical centrifugal separator for separating and recovering a solid content and a liquid in a solid-liquid mixture such as drainage.

[0002]

2. Description of the Related Art Conventionally, return water sludge accompanying sewage treatment,
Various devices have been proposed for treating sludge drainage from the coast, rivers, lakes and marshes, coal mining drainage, and the like, and accompanying this, separating and recovering solids and liquids. There is a vertical centrifuge described in Japanese Unexamined Patent Publication No. 2001-334175. This vertical centrifugal separator is provided with an outer cylinder that is rotatably arranged and an inner cylinder that is arranged in the outer cylinder and that rotates at a slight speed difference from the outer cylinder. It is supported. A screw blade spirally extending in a separation chamber between the outer cylinder and the inner cylinder is fixed to the outer peripheral surface of the inner cylinder, and the outer edge of the screw blade is slightly spaced from the inner wall surface of the outer cylinder. Is extended.

The slurry to be treated is supplied from the upper end of the inner cylinder, then discharged from the middle part of the inner cylinder into a separation chamber, where it is centrifugally separated into a liquid and a solid content. That is, the liquid flows out upward by the rotation of the outer cylinder, the inner cylinder, and the screw blade, while the solid content is scraped by the screw blade and is sent downward.

[0004]

By the way, in such a centrifugal separator, water or a cleaning liquid is supplied from the inner cylinder to clean the inside of the separation chamber after the operation is completed. However, if the solid content dries and adheres to the screw blade, it may be difficult to remove it, and it is difficult to perform reliable cleaning.

There are also the following problems. That is, since the slurry to be treated often contains impurities, it was difficult to separate and collect only a desired solid content. For example, when separating chips generated by cutting an aluminum material, the cutting liquid may be coated on the chips, and the separated solid content may be coated with impurities or the like. It could not be reused as it is. Therefore, there is a problem in that the collected solid content needs to be washed and cannot be efficiently reused.

The present invention has been made in order to solve the above problems, and provides a vertical centrifuge device that ensures cleaning of the separation chamber and that allows the separated solid content to be efficiently reused. The purpose is to do.

[0007]

In order to achieve the above object, the present invention provides a cylindrical outer rotating body rotatable about an axis extending in a substantially vertical direction, and an inner rotating body around the axis. Provided on the inner rotating body, a rotatable inner rotating body, and a screw blade attached to the outer peripheral surface of the inner rotating body and disposed with a slight gap between the inner rotating body and the inner wall surface of the outer rotating body. A supply means for supplying a solid-liquid mixture to be processed into a separation chamber between the outer rotating body and the inner rotating body, and is connected to the upper end portion or the lower end portion of the outer rotating body and the inner rotating body, Any of the outer rotating body and the inner rotating body, which transmits the rotation of one of the outer rotating body and the inner rotating body to the other, and rotates these rotating bodies in the same direction with a predetermined rotation speed difference, and the outer rotating body and the inner rotating body. Driving hand that rotates one side And an injection unit that extends through the planetary gear mechanism to the inside of the inner rotating body and is capable of injecting a cleaning liquid or air from the wall surface of the inner rotating body to the solid content separated in the separation chamber. A vertical centrifuge device characterized by comprising:

The inner wall surface of the outer rotary member facing the separation chamber is tapered at least at a position below the position where the solid-liquid mixture is supplied by the supply means.
The diameter decreases as it goes downward, and the screw blade is configured to send the solid content in the solid-liquid mixture to the lower end of the outer rotating body as the inner rotating body rotates. Can be.

In this case, the jetting means can be jetted toward the tapered inner wall surface of the outer rotary body.

Further, a guide member is formed at the lower end of the outer rotating body in the shape of a skirt with a widened skirt, and guides downwardly the solid content discharged radially from the lower end of the outer rotating body. Can be.

The outer rotating body is provided with a rotating shaft which is rotationally driven by the driving means and extends inside the outer rotating body, and the inner rotating body is supported by the rotating shaft via bearings. Can be

In this case, the planetary gear mechanism is connected to the lower ends of the outer rotating body and the inner rotating body, and meshes with an internal gear to which the rotation of the outer rotating body is transmitted. Eccentric oscillating rotation, and an externally toothed gear that transmits this rotation to the inner rotating body, and a crankshaft that eccentrically oscillates and rotates the externally toothed gear, further comprising differential speed drive means that rotates the crankshaft. The injection means may be provided so as to penetrate the external gear and extend inside the inner rotary body.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vertical centrifugal separator according to the present invention will be described below with reference to the drawings.
1 is a front cross-sectional view of a vertical centrifugal separator according to the present embodiment, FIG. 2 is a perspective view of the vertical centrifugal separator of FIG. 1, FIG. 3 is a cross-sectional view of an essential part of the upper portion of FIG. 1, and FIG. It is a principal part sectional drawing of the lower part of 1.

This vertical type centrifugal separator is for separating and recovering a solid content and a liquid from a slurry (solid-liquid mixture), and as shown in FIG. 1, is formed in a cylindrical shape extending in the vertical direction. The outer cylinder (outer rotary body) 1 and the inner cylinder (inner rotary body) 5 arranged inside the outer cylinder 1 and having the screw blades 3 attached to the outer peripheral surface thereof. The outer cylinder 1 and the inner cylinder 5 are rotatable about the same axis, and the top plate 7
It is suspended and supported by. As shown in FIG. 2, the top plate 7 is supported by four columns 9 and is placed on a support base 11. The outer cylinder 1 and the inner cylinder 5 are covered with a cylindrical cover member 13.

The support base 11 is provided with four support legs 15 and a rectangular frame body 17 supported by these.
A cross-shaped partition member 19 is provided inside the frame body 17. Then, four curved members are arranged around the partition member 19 so as to form a cylinder, and form a part 13d1 of a cover member described later. The separated solid content passes through the inside of the cover member 13d1. Further, the above-mentioned four columns 9 are erected on the upper surface of the frame body 17, and these columns 9 support the top plate 7.

As shown in FIGS. 1 and 3, the outer cylinder 1 is constituted by connecting a cylindrical upper outer cylinder 1a and a lower outer cylinder 1b, and the upper outer cylinder 1a is tapered. The lower outer cylinder portion 1b is formed in a straight shape without any shape, and the lower outer cylinder portion 1b is formed in a tapered shape whose diameter becomes smaller as it goes downward. The upper end of the upper outer tubular portion 1a is closed by an upper lid 25 having a discharge opening 23 that can be opened and closed.
By adjusting the opening degree of, the separation time of the separated liquid can be adjusted as described later. The top plate 7 is provided with an adjustment opening 24 with a cover at a position corresponding to the ejection opening 23, and the opening of the ejection opening 23 is opened via the adjustment opening 24 by removing the cover. Can be adjusted.

A rotating shaft 27 extending in the vertical direction is attached to the upper lid 25 of the outer cylinder 1. Rotating shaft 27
Extends through the top plate 7 and extends upward, and is rotatably suspended and supported by the top plate 7 via angular bearings 29. More specifically, the outer ring of the angular bearing 29 is held by the guide cylinder 22 attached to the top plate 7, while the inner ring of the bearing 29 is rotated by the rotating shaft 27.
It is locked to the step 26 formed on the outer peripheral surface of the and is tightened and fixed to the bearing nut from 28.

A pulley 31 is attached to a portion of the rotary shaft 27 that projects upward from the top plate 7, and a belt 33 wound around the pulley 31 drives a drive shaft 37 of a first motor (driving means) 35. It is wound around. Therefore, the outer cylinder 1 is rotated by driving the first motor 35. Further, a supply pipe 39 for supplying the slurry to be processed is inserted through the rotary shaft 27.

As shown in FIG. 4, at the lower end of the lower outer tubular portion 1b, a tubular connecting member 41 is provided, for example, in Japanese Patent Laid-Open No. 11-.
An eccentric oscillation type planetary gear mechanism 43 as shown in Japanese Patent No. 173386 is connected. The connecting member 41 is connected to an internal gear 43a that forms an outer peripheral edge of the planetary gear mechanism 43, the rotation of the outer cylinder 1 is transmitted to the internal gear 43a, and the rotation of the internal gear 43a will be described later. It is transmitted to the cylinder 5. In addition, a plurality of openings 45 through which the separated solid content passes are formed on the outer peripheral surface of the connecting member 41. Further, a guide member 47 extending downward in a skirt shape is attached to the upper end portion of the connecting member 41 so as to guide the solid content passing through the opening 45 downward.

As shown in FIG. 1, the inner cylinder 5 is provided with an upper inner cylinder part 5a and a lower inner cylinder part 5b corresponding to the upper outer cylinder part 1a and the lower outer cylinder part 1b, respectively. Are connected by four flow dividing plates 49 extending radially. A screw blade 3 extending in the axial direction along the separation chamber S between the outer cylinder 1 and the inner cylinder 5 is attached to the outer peripheral surface of the inner cylinder 5, and the outer edge of the screw blade 3 is the outer cylinder 1 A small gap is formed between the inner wall surface and the inner wall surface. Therefore, the lower half portion of the screw blade 3 and the lower inner tubular portion 5b are formed in a tapered shape corresponding to the lower outer tubular portion 1b. Further, the screw blade 3 is configured to send out the solid content separated by the rotation of the inner cylinder 5 downward.

As shown in FIG. 3, the lower end of the upper inner cylindrical portion 5a,
And the lid members 53, 55 on the upper ends of the lower inner tubular portion 5b, respectively.
Are attached, and the above-described four flow dividing plates 49 are radially attached between the lid members 53 and 55. Each of the flow distribution plates 49 is formed in a trapezoidal shape so as to expand in the vertical direction from the center of the inner cylinder 5 outward in the radial direction. The rotating shaft 2 of the outer cylinder 1 is provided inside the upper inner cylinder portion 5a.
The supply pipe 39 inserted in 7 extends through the cover member 53 to the vicinity of the flow dividing plate 49, and the slurry supplied to the supply pipe 39 collides with the cover member 55 of the lower inner tubular portion 5b and divides the flow dividing plate 4.
Radiation is emitted from between 9 to the separation chamber S. Here, the supply pipe 39 and the flow distribution plate 4 of the present embodiment.
9 constitutes the supply means of the present invention.

As shown in FIG. 3, the upper end portion of the upper inner tubular portion 5a is provided with a rotating shaft 27 of the upper outer tubular portion 1a via a bearing 50.
Supported by. On the other hand, as shown in FIG. 4, the lower end of the lower inner tubular portion 5 b is connected to the planetary gear mechanism 43 via the connecting member 57.
As described above, the rotation of the outer cylinder 1 is transmitted through the planetary gear mechanism 43, and the inner cylinder 5 rotates in the same direction as the outer cylinder 1 at a slight differential speed described later. ing. A hollow differential speed input shaft 58 penetrates through the center of the planetary gear mechanism 43 in the vertical direction, and an inlet pipe 59 through which a cleaning liquid described later flows at the upper end of the differential speed input gear 58.
Are connected. The introduction pipe 59 is used for the planetary gear mechanism 4
3 extends upward to the inside of the lower inner cylindrical portion 5b. A plurality of radially extending injection pipes 61 are connected to a portion of the introduction pipe 59 located inside the lower inner cylinder portion 5b, and a tip end portion of the injection pipe 61 is provided on a wall surface of the inner cylinder 5. It is connected to the injection port 63. That is, the introduction pipe 5
9 communicates with the separation chamber S via the wall surface of the inner cylinder 1 and the injection pipe 61, and the cleaning liquid flowing through the differential speed input shaft 58 and the introduction pipe 59 can be injected into the separation chamber S. In the present embodiment, the differential speed input shaft 58, the introduction pipe 59, and the injection pipe 61.
Which constitutes the injection means of the present invention.

Regarding the planetary gear mechanism 43, Japanese Patent Laid-Open No.
As described in JP-A-173386, a detailed description thereof will be omitted, but the outline is as follows. That is, as shown in FIG. 4, the planetary gear mechanism 43 is provided with a two-stage reduction gear unit, and the first reduction gear unit has a plurality of pins 43b on the inner periphery to form a pin gear. Tooth gear 43a
And an external gear 43c that meshes with the internal gear 43a. The external gear 43c has a diameter slightly smaller than that of the internal gear 43a, and the number of teeth is reduced accordingly, so that the external gear 43c rotates while performing eccentric motion in the internal gear 43a. A through hole 43d is formed in the external gear 43c, and the support 43f of the disc portion 43e connected to the connecting member 57 allows the eccentric swing rotation of the external gear 43c in the through hole 43d. Is loosely fitted. Therefore, the external gear 43c is rotated by the rotation of the internal gear 43a, and the connection member 57 is rotated together with the disc portion 43e. Accordingly, the rotation of the outer cylinder 1 causes the inner cylinder 5 to rotate in the same direction at a predetermined differential speed.

The second speed reducer is the differential speed input shaft 58 described above.
A differential speed input gear 43g fixed to the crankshaft, and three intermediate gears 43i (only one is shown in FIG. 4) meshing with the differential speed input gear 43g and fixed to the crankshaft 43h. The shaft 43h is fitted through a bearing into a mounting hole 43j formed in the external gear 43c, and the external gear 43
The c is rotated while eccentrically swinging.

When the differential speed input gear 43d does not rotate, the internal gear 43a acts as an input and the external gear 43c acts as an output as described above, and a predetermined differential speed is generated as the outer cylinder 1 rotates. The inner cylinder 5 rotates. In the case of the present embodiment, the outer cylinder 1 rotates at 4000 rpm, while the inner cylinder 5 rotates at 39 rpm.
It is set to rotate at 99 rpm. That is, the outer cylinder 1 rotates one rotation more than the inner cylinder 5 in one minute, so that the solid content adhering to the inner wall surface of the outer cylinder 1 is sent downward while being scraped off by the screw blades 3 of the inner cylinder 5. .

The reduction ratio of the planetary gear mechanism 43 can be changed by rotating the differential speed input gear 43. That is, as described above, the differential speed input gear 43g is
It is fixed to the differential speed input shaft 58, and as shown in FIG.
The differential speed input shaft 58 is rotatable by a second motor (differential speed drive means) 71 via a pulley 67 and a belt 69 provided below the planetary gear mechanism 43. Then, the differential speed input shaft 58 is driven by the second motor 71.
Is rotated, the crankshaft 43h is rotated and the external gear 4 is rotated.
3c is eccentrically moved, and the internal gear 43a and the external gear 43c are adjusted to have a desired differential speed. As a result, the outer cylinder 1 and the inner cylinder 5 are adjusted so as to rotate at a desired speed difference.

The differential speed input shaft 58 is supported by a cylindrical support member 73 via a bearing 75, and the support member 73 is a circular pedestal 77 provided on the partition member 19 of the support base 11. Is held on. The periphery of the support member 73 is covered with an inner cover member 78 for preventing contact with solid matter. The lower end portion of the differential speed input shaft 58 is connected to the hose 81 that supplies the cleaning liquid via the rotary valve 79. The rotary valve 79 and the hose 81 are provided inside the support member 73.
Besides, the above-mentioned pulley 67 of the differential speed input shaft 58 is housed, and the belt 69 and the hose 81 wound around the pulley 67 are formed on the outer peripheral surface of the inner cover member 78 via the support member 73. It extends from the opening 74 to the outside.

As shown in FIG. 1, the cover member 13 for covering the outer cylinder 1 is composed of four cylindrical members, that is, the first, second and third members.
And the fourth members 13a, 13b, 13c, 13d are detachably connected in the vertical direction. The first member 13a is arranged at a position corresponding to the upper outer tubular portion 1a,
The upper end is connected to the top plate 7. Further, as shown in FIG. 3, the first member 13 a has an opening 83 for discharging the liquid discharged from the upper lid 25 of the outer cylinder upper portion 1 a to the outside of the cover member 13, and a guide for guiding the liquid to this opening 83. Board 85
And a discharge pipe 87 is connected to the opening 83. The guide plate 85 is inclined downward along the inner wall surface while partitioning the first member 13a in the vertical direction,
By partitioning in this way, the liquid is prevented from flowing downward from the first member 13a.

As shown in FIG. 1, the second member 13b is arranged at a position corresponding to the lower outer cylinder portion 1b, and an outer peripheral surface thereof is provided with a detachable grip portion 89. Third member 13c
Is formed so as to extend from the vicinity of the lower end of the lower outer tubular portion 1b to the support stand 11, and has an opening 91 for inserting the belt 69 and the hose 81 of the second motor 71 described above. The opening 74 of the inner cover member 78 and the opening 93 of the second member 13c are connected by the housing member 92 that houses the belt 69 and the hose 81.
This prevents the belt 69 and the hose 81 from coming into contact with the separated solid content.

The first to third members 13a to 13c are
It is preferable to be configured so as to be divided into a plurality in the circumferential direction. Alternatively, it is preferable that a part of the outer peripheral surface be detachable. By doing so, maintenance of the outer cylinder 1 and the inner cylinder 5 described later becomes easy.

The fourth member 13d includes an upper half portion 13d1 located inside the frame body 17 of the support base 11 and a funnel-shaped lower half portion 1 which is connected to the upper half portion 13d1 and forms a discharge port.
3d2, and the solid content separated from the lower half 13d2 is discharged.

Next, the operation of the centrifugal separator constructed as above will be described. First, when the first motor 35 is driven, the outer cylinder 1 rotates, which causes the planetary gear mechanism 4 to rotate.
The inner cylinder 5 rotates in the same direction as the outer cylinder 1 with a predetermined speed difference via the shaft 3. At this time, if necessary, the second motor 71
Can also be driven to adjust the differential speed. Next, the slurry to be treated is supplied from the upper end of the supply pipe 39. The supplied slurry collides with the lid member 55 of the lower inner cylinder portion 5b inside the inner cylinder 5, and is then radially discharged to the separation chamber S by the flow dividing plate 49. Here, since the solid content contained in the slurry and the liquid have different specific gravities, the solid content is separated in the separation chamber S by the action of centrifugal force so that the solid content moves closer to the wall surface of the outer cylinder 1 than the liquid. .

The separated solid content adheres to the inner wall surface of the outer cylinder 1, but is dehydrated while being scraped downward by the screw blades 3 rotating at a differential speed with respect to the outer cylinder 1, and from the lower end of the outer cylinder 1. Is discharged. Then, this solid content is discharged from the opening 45 of the connecting member 73 connected to the lower end of the outer cylinder 1 by the action of centrifugal force, and is guided downward by the skirt-shaped guide member 47. At this time, a flow of air moving outward in the radial direction due to centrifugal force is formed inside the guide member 47. However, as shown in FIG. It flows to incline to. Therefore, the solid content is guided downward by this air flow. The solid content thus guided downward falls along the inner wall surface of the cover member 13, is discharged from the discharge port 13d2 of the fourth member 13d, and is collected by a predetermined container 80 or a conveyor. .

On the other hand, the separated liquid moves to the inner wall surface side of the outer cylinder 1, but does not move downward due to the centrifugal force where the inner diameter of the outer cylinder 1 decreases, and accumulates upward along the screw blades 3. Will be done. Then, the liquid accumulated in the separation chamber S overflows from the discharge opening 23 of the upper lid 25 of the outer cylinder 1 to be discharged from the separation chamber S. At this time, the separation time of the slurry can be adjusted by adjusting the opening degree of the discharge opening 23. That is, this opening 23
Is configured to reduce the opening degree by moving the lid 23a (see FIG. 3) to the center side of the outer cylinder 1, but the liquid inside the separation chamber S from the inner wall surface of the outer cylinder 1 Since it accumulates on the cylinder 3 side, if the opening is reduced, the separation chamber S
The amount of liquid accumulated in the inside increases. As a result, the ratio of the accumulated amount to the supplied amount can be increased, and the time until the supplied slurry is discharged, that is, the separation time can be lengthened. On the other hand, when the opening degree is increased, the amount of liquid accumulated in the separation chamber S decreases and the liquid is discharged in a short separation time. Therefore, by adjusting the opening degree, it is possible to achieve a desired separation time according to the type of slurry to be treated.

The liquid discharged from the discharge opening 23 is guided to the opening 83 along the guide plate 85 attached to the inner wall surface of the cover member 13 and discharged from the discharge pipe 87.

Incidentally, once the separated solid content is dried and adheres to the screw blade 3, there is a problem that it is difficult to remove it. Therefore, in the present embodiment, this is prevented as follows. That is, the cleaning liquid is supplied to the introduction pipe 59 during the separation work, and the injection port 6
It is injected into the separation chamber S via 3. Here, the injection port 63 is
Since it is arranged in the lower inner cylinder portion 5b, the screw blade 3
The cleaning liquid can be sprayed to the lower part of the blade, and the solid content attached to the screw blade 3 can be washed away. Therefore, it is possible to facilitate the cleaning after the operation is completed and to reliably collect the solid content.

Since impurities may be attached to the solid matter by coating or the like, the solid matter can be washed with a washing liquid. For example, use fresh water when the solid content is contaminated with sewage, use a predetermined alkaline solution or acidic solution when adjusting the pH of the solid content, and use a predetermined potential solution when adjusting the potential difference. You can Further, the sprayed cleaning liquid rises along the wall surface of the tapered lower inner cylindrical portion 5b due to centrifugal force and is mixed with the supplied slurry. Therefore, it is possible to reduce the concentration of impurities by diluting a slurry that often contains impurities,
As a result, there is also an advantage that the purity of the recovered solid content can be increased. At this time, if the cleaning liquid is selected according to the type of the slurry to be supplied, it is possible to neutralize the properties of the slurry such as acid or alkali, thereby stabilizing the properties of the recovered solid content. . By doing so, the recovered solid content can be efficiently reused.

When the centrifugal separator is washed after the operation is completed, the washing liquid is introduced from the introduction pipe 59 or the washing liquid is supplied from the supply pipe 39 as described above while the outer cylinder 1 and the inner cylinder 5 are rotated. To introduce. Further, by introducing air from the introduction pipe 59 or the supply pipe 39, the inside of the separation chamber S can be dried quickly. Water may be introduced instead of the cleaning liquid.

As described above, since the separated solid content may be impregnated with impurities, when the cleaning liquid is sprayed on the separated solid content in the separation chamber S as described above, the solid content is washed. The property of the solid content can be stabilized by neutralization and the like, and it becomes possible to reuse immediately after recovery. Further, it is possible to prevent the solid content from adhering to the screw blades 3, the solid content can be reliably recovered, and the cleaning after the operation is completed becomes easy.

Further, in this embodiment, the outer cylinder 1 and the inner cylinder 5 are
The planetary gear mechanism 43 is connected to the lower end of the outer cylinder 1, and the inner cylinder 5 is supported by the bearing 50 on the rotating shaft 27 inside the outer cylinder 1. The inner cylinder 5 can be rotated at a differential speed by rotationally driving only the outer cylinder 1. Therefore, there are the following advantages. For example, the outer cylinder and the inner cylinder each have a rotation axis,
If the rotation shaft of the inner cylinder is configured to be inserted into the rotation shaft of the outer cylinder, it is necessary to increase the diameter of the rotation shaft of the outer cylinder. In this case, the bearing attached to the rotary shaft of the outer cylinder rotates at a high peripheral speed because the diameter of the rotary shaft is large. As a result, the load such as friction acting on the bearing is increased and the life is shortened. On the other hand, in the present embodiment, the inner cylinder 5 has independent drive means,
In other words, it is rotated by the planetary gear mechanism without a motor,
Since only the rotary shaft 27 of the outer cylinder 1 is configured to be rotationally driven, the diameter of the rotary shaft 27 can be reduced. Therefore, the load such as friction acting on the bearing 50 can be reduced, and the life of the bearing 50 can be extended.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-mentioned embodiment, the outer cylinder 1 and the inner cylinder 5 are supported by the top plate 7, the support column 9, and the support base 11,
For example, the outer cylinder 1 and the inner cylinder 5 may be housed and supported in the casing.

In the above embodiment, the outer cylinder 1 is rotationally driven, but the inner cylinder 5 can be rotationally driven by a motor to rotate the outer cylinder 1 via the planetary gear mechanism 43. Further, the planetary gear mechanism 43 can be attached to the upper ends of the outer cylinder 1 and the inner cylinder 5. In this case, the first motor 35 is provided in the lower part of the apparatus, and the introduction pipe 59 for cleaning
Etc. from the upper part of the device through the planetary gear mechanism 43.
Be introduced inside.

The injection port 63 may be provided at any position as long as it can inject the liquid into the separated solid content, and is provided between the position where the slurry is supplied and the position where the solid content is discharged. If so, there is no particular limitation.

In the above embodiment, the outer cylinder 1 and the inner cylinder 5 are
As described above, the plurality of tubular members 1a, 1b, 5a, 5b
Although it is configured by connecting, it may be integrally formed. However, as described above, the straight portions 1a, 5a
And the tapered portions 1b and 5b, it is easier to manufacture and assemble by dividing into separate parts, and it is possible to easily deal with the case where the capacity of the separation chamber is increased or decreased. You can That is, it is possible to deal with it by appropriately combining short members or long members.

Further, in the above-mentioned embodiment, the inner cylinder 5 is constituted by connecting the cylindrical members, but it may be constituted by a solid member. However, from the viewpoint of weight reduction and cost reduction, it is preferable to use a cylindrical shape.

In the above-mentioned embodiment, the liquid is discharged from the upper end of the outer cylinder 1 and the solid content is discharged from the lower end, but this can be reversed. That is, the direction of the screw blade 3 is changed so that the solid content is sent out upward, and the outer cylinder 1, the inner cylinder 5, and the screw blade 3 are formed so that the diameter becomes smaller as they go upward. In this case, the introduction pipe 59, the injection pipe 61, etc. are arranged so that the cleaning liquid is jetted from the upper part of the inner cylinder 5.

[0047]

As is apparent from the above description, the vertical centrifuge according to the present invention has the jetting means capable of jetting the washing liquid or air to the separated solids. Therefore, when the liquid is jetted during the operation of the device, the solid content can be prevented from adhering to the screw blades, and the solid content can be reliably recovered. Further, it becomes possible to wash the solid content to which impurities are attached, and it can be reused immediately after the collection.

Further, the inner wall surface of the outer rotary member facing the separation chamber is tapered at least below the position where the solid-liquid mixture is supplied by the supply means, and the diameter becomes smaller as it goes downward. In addition, the screw blades are configured to send the solid content in the solid-liquid mixture to the lower end portion of the outer rotating body with the rotation of the inner rotating body. The liquid can be recovered from above and the solid content can be recovered from below. In this way, by allowing the solid content to be collected below the device, it is possible to use the natural fall of the solid content, and it is possible to shorten the carry-out route to the conveyor or the collection container installed on the ground. The solid content can be easily collected as compared with the case of collecting it above.

In this case, if the jetting means is configured to jet the liquid onto the tapered inner wall surface of the outer rotary body, the liquid is mixed with the solid-liquid mixture along the tapered inner wall surface.
By doing so, the solid-liquid mixture containing the impurities can be diluted to reduce the concentration of the impurities, and as a result, the solid content having high purity can be recovered.

Further, if the inner rotary body is rotated by the planetary gear mechanism without having an independent drive means and only the rotary shaft of the outer rotary body is rotationally driven, the diameter of the rotary shaft can be reduced. it can. Therefore, it is possible to reduce the load such as friction applied to the bearing attached to the rotary shaft, and it is possible to extend the life of the bearing.

In addition, the planetary gear mechanism engages with the internal gear to which the rotation of the outer rotary body is transmitted, and the external gear that meshes with the internal gear to rotate eccentrically and to transmit this rotation to the inner rotary body. When the gear and the crankshaft for eccentrically swinging and rotating the external gear are provided, the differential speed between the outer rotor and the inner rotor can be easily changed when the crankshaft is rotationally driven. You can

[Brief description of drawings]

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

FIG. 2 is a perspective view showing the vertical centrifugal separator according to FIG.

FIG. 3 is a cross-sectional view of relevant parts showing an upper portion of the outer rotating body of FIG.

FIG. 4 is a cross-sectional view of relevant parts showing the vicinity of the lower end portion of the outer rotating body of FIG.

[Explanation of symbols]

1 Outer cylinder (outer rotor) 3 screw blades 5 Inner cylinder (inner rotating body) 27 rotation axis 35 first motor (driving means) 39 Supply pipe (supply means) 43a Internal gear 43c External gear 43h crankshaft 49 Flow distribution plate (supply means) 50 bearings 58 Differential speed input shaft (introduction means) 59 Introducing pipe (injection means) 61 injection pipe (injection means) 63 injection port (injection means) 71 Second motor (differential speed drive means)

Claims (5)

[Claims] 1. A cylindrical outer rotating body rotatable about an axis extending in a substantially vertical direction, an inner rotating body rotatable about the axis inside the outer rotating body, and an outer peripheral surface of the inner rotating body. And a screw blade that is attached to the inner rotor of the outer rotor to form a slight gap between the inner rotor and the inner rotor, and is separated from the inner rotor by the inner rotor. Supply means for supplying a solid-liquid mixture to be treated to the chamber, and upper or lower end portions of the outer rotating body and the inner rotating body are connected to rotate either one of the outer rotating body and the inner rotating body. A planetary gear mechanism that transmits to the other and rotates these rotating bodies in the same direction with a predetermined rotational speed difference, a drive unit that rotationally drives one of the outer rotating body and the inner rotating body, and the planetary gear mechanism. Through the inner rotating body And a jetting means that is capable of jetting a washing liquid or air from the wall surface of the inner rotating body to the solid content separated in the separation chamber, and a vertical centrifugal separator. . 2. An inner wall surface of the outer rotor that faces the separation chamber is tapered at least at a position below the position where the solid-liquid mixture is supplied by the supply means, and the inner wall surface is tapered downward. The diameter is small, and the screw blade is configured to send the solid content in the solid-liquid mixture to the lower end portion of the outer rotating body as the inner rotating body rotates. The vertical centrifugal separator according to claim 1. 3. The vertical centrifugal separator according to claim 2, wherein the jetting means jets toward the tapered inner wall surface of the outer rotary body. 4. The outer rotating body includes a rotating shaft that is rotationally driven by the driving means and extends inside the outer rotating body, and the inner rotating body is supported by the rotating shaft via bearings. The vertical centrifuge according to any one of claims 1 to 3, wherein 5. The planetary gear mechanism is connected to the lower end portions of the outer rotating body and the inner rotating body, and an eccentric gear meshes with the internal gear to which the rotation of the outer rotating body is transmitted. An externally toothed gear that oscillates and transmits this rotation to the inner rotating body, a crankshaft that eccentrically oscillates and rotates the externally toothed gear, and further includes a differential speed drive unit that rotates the crankshaft. 5. The vertical centrifugal separator according to claim 4, wherein the jetting unit penetrates the external gear and extends inside the inner rotating body.