JP2003326194A - Vertical centrifugal separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical centrifugal separator capable of easily performing the maintenance of an outer cylinder and an inner cylinder. <P>SOLUTION: The vertical centrifugal separator is equipped with the outer cylinder 1 rotatable around an axial line extending in an almost vertical direction, the inner cylinder 5 provided in the outer cylinder to be rotatable around the axial line in the same direction so as to generate a predetermined difference in the number of rotations with respect to the outer cylinder 1, a screw flight 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, a supply pipe 39 provided in the inner cylinder 5 and supplying a slurry to be treated to the separation chamber S between the outer and inner cylinders 1 and 5, a top plate 7 for supporting the outer and inner cylinders 1 and 5 in a suspended state, a support 9 and a support stand 11 and a cover member 13 for covering the periphery of the outer cylinder 1 in a freely detachable manner. <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 one of them is a vertical centrifugal separator described in JP 2001-334175 A. . 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. On the outer peripheral surface of the inner cylinder, screw blades spirally extending in a separation chamber between the outer cylinder and the inner cylinder are fixed.
It is arranged so as to form a slight gap between the outer edge and the inner wall surface of the outer cylinder.

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

By the way, in this vertical type centrifugal separator, an outer cylinder and an inner cylinder are supported by a casing. That is, the casing serves as a cover that covers the outer cylinder and the inner cylinder, and also serves as a support member. Therefore, the casing is formed of a thick and strong member.

[0005]

However, this configuration has the following problems in the maintenance of the outer cylinder and the inner cylinder. That is, if the casing is firmly formed as described above, it cannot be removed, so during maintenance, the outer cylinder and the inner cylinder are hung from above the casing, and then once put out of the casing. I was doing maintenance. Therefore, there is a problem that a very complicated work is required until the maintenance work is performed and the work takes a long time.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a vertical centrifugal separator which can easily perform maintenance of an outer cylinder and an inner cylinder.

[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 inside of the outer rotating body.
A slight difference is provided between the inner rotating body that is rotatable in the same direction around the axis with a predetermined rotation speed difference from the outer rotating body, and is attached to the outer peripheral surface of the inner rotating body and the inner wall surface of the outer rotating body. Screw blades arranged so as to form a gap,
A supply unit that is provided in the inner rotating body and that supplies a solid-liquid mixture to be processed into a separation chamber between the outer rotating body and the inner rotating body, and suspends the outer rotating body and the inner rotating body. The present invention provides a vertical centrifuge, which comprises a supporting body for supporting and a cover member that detachably covers the periphery of the outer rotating body.

The support body includes an upper frame for suspending and supporting a rotary shaft provided on at least one of the outer rotary body and the inner rotary body, and a plurality of support frames arranged around the cover member for supporting the upper frame. And a pillar of the.

The outer rotating body may be constructed so that a balance weight for adjusting the rotation balance can be attached.

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.

Here, a guide member is attached to the lower end portion of the outer rotating body in a skirt-like shape so as to widen the skirt, and guides downward the solid content discharged radially from the lower end of the outer rotating body. It can be

[0012]

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 vertical sectional front 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 are suspended and supported by a top plate (upper frame) 7. As shown in FIG. 2, the top plate 7 is supported by four columns 9 and is placed on a support base 11. In addition, the outer cylinder 1 and the inner cylinder 5 have a cylindrical cover member 13
Is covered by. In the present embodiment, the top plate 7, the support column 9 and the support base 11 described above constitute the support of the present invention.

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 in a cylindrical shape with the partition member 19 as a center,
It constitutes a part 13d1 of the cover member described later. The separated solid content passes through the inside of the cover member 13d1. Further, on the upper surface of the frame body 17, the above-mentioned four columns 9
Are erected, 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 cylindrical portion 1b is formed in a straight shape without any shape, and the lower outer cylindrical portion 1b is formed in a tapered shape whose diameter becomes smaller as it goes downward. An upper lid 25 having a discharge opening 23 is provided at the upper end of the upper outer tubular portion 1a. By adjusting the opening degree of the discharge opening 23, the separation time of the slurry can be adjusted as described later. it can. An adjustment opening 24 with a cover is provided at a position corresponding to the discharge opening 23 on the top plate 7, and the discharge opening 2 is provided through the adjustment opening 24.
The work of adjusting the opening degree of 3 can be performed.

A rotary 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 angular contact bearing 29 is attached to the guide cylinder 22 attached to the top plate 7.
While the outer ring of the bearing 29 is held, the inner ring of the bearing 29 is locked to the step 26 formed on the outer peripheral surface of the rotating shaft 27 and is fixed to the bearing nut 28 by tightening.

A pulley 31 is attached to a portion of the rotary shaft 27 protruding upward from the top plate 7, and a belt 33 wound around the pulley 31 is wound around a drive shaft 37 of a first motor 35. (See FIG. 1). 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 interposed, 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, and the rotation of the outer cylinder 1 is transmitted to the internal gear 43a, so that the internal gear 43a rotates as described later. Is transmitted to the inner 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, the upper end portion of the connecting member 41, that is, the lower outer tubular portion 1
A guide member 47 extending downward in a skirt shape is attached to the lower end of b so as to guide downward the solid content discharged from the opening 45 in the radial direction.

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 of the outer cylinder 1, respectively. Are connected via 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 part of the screw blade 3 and the lower inner cylinder part 5b are
It is formed in a tapered shape corresponding to. Further, the screw blade 3 is configured to rotate together with the inner cylinder 5 and send the separated solid content downward.

As shown in FIG. 3, the lower end of the upper inner cylinder 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. In the present embodiment, the supply pipe 39 and the flow distribution plate 49 form the supply means of the present invention.

As shown in FIG. 3, the upper end portion of the upper inner cylinder portion 5a is provided with a rotating shaft 27 of the upper outer cylinder 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 via 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. . At the center of the planetary gear mechanism 43, a hollow differential speed input shaft 5
8 penetrates in the up-down direction, and an introduction pipe 59 through which a cleaning liquid described later flows is connected to the upper end of the differential speed input shaft 58. The introduction pipe 59 extends upward from the planetary gear mechanism 43 to the inside of the lower inner cylindrical portion 5b. This introduction pipe 5
9, a plurality of radially extending injection pipes 61 are connected to a portion located inside the lower inner cylinder portion 5b, and a tip end portion of the injection pipe 61 is an injection port provided on a wall surface of the inner cylinder 5. It is connected to 63. That is, the introduction pipe 59 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. There is.

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. In this way, 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 reducing portion 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) meshed 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 43d is
It is fixed to the differential speed input shaft 58, and as shown in FIG.
The differential speed input shaft 58 is connected to the second motor 7 via a pulley 67 and a belt 69 provided below the planetary gear mechanism 43.
It can be rotated by 1. When the differential speed input shaft 58 is rotated by the second motor 71, the crankshaft 43h is rotated and the external gear 43c is eccentrically moved, so that the internal gear 43a and the external gear 43c have a desired differential speed. Is adjusted. As a result, the outer cylinder 1 and the inner cylinder 5 are adjusted so as to rotate at a desired speed difference.

As shown in FIG. 1, the differential speed input shaft 58
Is supported by a cylindrical support member 73 via a bearing 75, and the support member 73 is held on a circular pedestal 77 provided on the partition member 19 of the support base 11. 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. Inside the support member 73, in addition to the rotary valve 79 and the hose 81, the differential speed input shaft 58 described above is provided.
The pulley 67 is housed therein, and the belt 69 and the hose 81 wound around the pulley 67 extend to the outside from the opening 74 formed on the outer peripheral surface of the inner cover member 78 via the support member 73.

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 upper portion of the outer cylinder 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 partitions the inside of the first member 13a in the vertical direction, and is inclined downward along the inner wall surface, and by partitioning in this way, the liquid is prevented from flowing below the first member 13a. is doing.

As shown in FIG. 1, the second member 13b is arranged at a position corresponding to the lower outer cylindrical portion 1b, and a gripping portion 89 for attachment and detachment is provided on the outer peripheral surface thereof. 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, a part of the outer peripheral surface may 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 17 of the support base 11 and a funnel-shaped lower half portion 1 connected to the upper half portion 13d1 to form a discharge port.
3d2, and the solid content separated from the lower half 13d2 is discharged.

Next, the operation of the centrifugal separator having the above structure 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 5 a 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 and the liquid contained in the slurry 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 inner wall surface of the outer cylinder 1 than the liquid. It

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 to the lower side where the inner diameter becomes smaller in the outer cylinder 1 due to the centrifugal force, 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 attached 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 content by coating or the like, it may 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 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.

The vertical centrifuge constructed as described above has the following advantages. That is, the outer cylinder 1 and the inner cylinder 5 are suspended and supported, and the outer cylinder 1 is covered.
Since it is covered with, the maintenance of the outer cylinder 1 becomes very easy. That is, the cover member 13 includes the outer cylinder 1 and the inner cylinder 5.
Since it does not support, it can be composed of a light and thin member, and can be easily removed. Therefore, it is not necessary to take out the outer cylinder and the inner cylinder from the device at the time of maintenance as in the conventional case, and only by removing the cover member 13, the outer cylinder 1 and the planetary gear mechanism 43 are removed.
It is possible to easily perform maintenance such as.

Further, with the above structure, the bearing 29 provided between the outer cylinder 1 and the top plate 7 can be easily maintained. In this case, a tool for connection is inserted from the adjustment opening 24 (see FIG. 3) of the top plate 7 and the outer cylinder 1
The upper lid 25 and the top plate 7 are connected, and the outer cylinder 1 is supported so as to be suspended. In this state, the bearing 29 is replaced or the like for maintenance. Therefore, the bearing 29 can be easily maintained without removing the outer cylinder 1.

Since the cover member 13 can be easily removed as described above, the rotation balance of the outer cylinder 1 can be easily adjusted. That is, as shown in FIGS. 3 and 4, a plurality of mounting openings 95 are formed at the upper end portion and the lower end portion of the outer peripheral surface of the outer cylinder 1, and by simply removing the cover member 13, the mounting openings 95 are formed. The balance weight 97 can be easily attached to the. More specifically, with the cover member 13 removed, the outer cylinder 1 is rotated to measure the eccentricity state and the like, and the balance weight 97 is attached at an appropriate position accordingly. Can be easily adjusted. The mounting ports can be provided not only on the upper and lower ends of the outer cylinder 1, but also on other portions of the outer peripheral surface. Alternatively, it can be provided in the inner cylinder 5.

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 embodiment, the support of the present invention is configured by the top plate 7, the support column 9, and the support base 11. However, if the outer cylinder 1 and the inner cylinder 5 can be suspended and supported, its shape Is not particularly limited. However, by disposing and supporting a plurality of columns 9 around the cover member 13 as described above, the outer cylinder 1 and the inner cylinder 5 can be stably supported.

Further, the outer cylinder 1 and the inner cylinder 5 are constituted by connecting a plurality of cylindrical members 1a, 1b, 5a, 5b as described above, but they may be integrally formed. However, in the case where it is composed of the straight portions 1a and 5a and the tapered portions 1b and 5b as described above, it is easier to manufacture and assemble in a divided manner, and the separation chamber S Even when the capacity is increased or decreased, it is possible to easily cope with it. That is, it is possible to deal with it by appropriately combining short members or long members.

In the above embodiment, the inner cylinder 5 is formed by connecting the cylindrical members, but it may be formed 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 embodiment, the cover member 13 is formed by connecting a plurality of members, but it may be integrally formed. When the cover member 13 is composed of a plurality of members as described above, the cover member 13 may be connected by bolts, or may be configured so as to be water-tightly connected by fitting in concavities and convexities.

In the above 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. In this case, 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. To do. Even with such a configuration, as long as the outer cylinder 1 and the inner cylinder 5 are suspended and supported, the same effect as that of the above-described embodiment can be obtained.

[0046]

As is apparent from the above description, according to the vertical centrifugal separator of the present invention, the outer rotor and the inner rotor are suspended and supported by the support, and the outer rotor is covered. Since it is covered with, the maintenance of these rotating bodies becomes very easy. That is, since the cover member does not support each rotating body, the cover member can be configured by a lightweight and thin member, and thus can be easily removed. Therefore, it is not necessary to take out each rotary body from the device at the time of maintenance as in the conventional case, and the maintenance of the rotary body inside thereof can be easily performed only by removing the cover member.

If the supporting body is composed of an upper frame for suspending the outer rotating body and the inner rotating body and a plurality of columns arranged around the cover member and supporting the upper frame, the rotating body is stably supported. be able to.

Since the cover member can be easily removed as described above, if the balance weight can be attached to the outer rotating body, the rotation balance of the outer rotating body can be easily adjusted. That is, when the cover member is removed, the outer rotating body is rotated to measure the eccentric state and the like, and the balance weight is attached at an appropriate position accordingly, whereby the rotational balance can be adjusted.

Further, the inner wall surface of the outer rotary body facing the separation chamber side 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 is easier to collect than the upper part.

At this time, if a skirt-shaped guide member with a widened skirt is provided at the lower end of the outer rotating body, the separated solid content can be smoothly guided downward. That is, a flow of air moving outward in the radial direction due to centrifugal force is formed inside the guide member, but the air flows so as to spread downward along the guide member and incline downward.
Therefore, the solid content can be smoothly guided downward by this air flow, and the collection can be easily performed.

[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) 7 Top plate (upper frame) 9 props 11 Support stand (support) 13 Cover member 27 rotation axis 39 Supply pipe (supply means) 49 Flow distribution plate (supply means) 97 Balance weight

Claims (5)

[Claims] 1. A cylindrical outer rotating body rotatable about an axis extending in a substantially vertical direction, and inside the outer rotating body, in the same direction about the axis with a predetermined rotational speed difference from the outer rotating body. A rotatable inner rotating body, a screw blade attached to the outer peripheral surface of the inner rotating body and arranged with a slight gap between the inner rotating body and the inner wall surface of the outer rotating body, and provided on the inner rotating body A supply means for supplying a solid-liquid mixture to be processed to a separation chamber between the outer rotating body and the inner rotating body, and a support for suspending and supporting the outer rotating body and the inner rotating body, A vertical centrifugal separator, comprising: a cover member that detachably covers the periphery of the outer rotating body. 2. The support body includes an upper frame that suspends and supports a rotation shaft provided on at least one of the outer rotating body and the inner rotating body, and supports the upper frame that is disposed around the cover member. The vertical centrifuge according to claim 1, further comprising a plurality of columns. 3. The vertical centrifugal separator according to claim 1, wherein the outer rotating body is configured so that a balance weight for adjusting the rotational balance can be attached. 4. An inner wall surface of the outer rotating body facing the separation chamber is tapered at least below a position where the solid-liquid mixture is supplied by the supply means, and 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. 5. A guide member is attached to a lower end portion of the outer rotating body and is formed in a skirt shape so as to widen a hem, and guides downward a solid content discharged in a radial direction from a lower end of the outer rotating body. The vertical centrifuge according to claim 4, characterized in that