JP2021028061A - Solid-liquid separation and recovery device - Google Patents

Abstract

To provide a solid-liquid separation and recovery device which removes water content from kitchen waste slurry discharged from a disposer and takes out a solid content, and in which dehydration failure is unlikely to occur.SOLUTION: A solid-liquid separation and recovery device comprises: a screen cylinder 8: and a screw 9 which is located in the screen cylinder coaxially with the screen cylinder, and lifts kitchen waste slurry above the screen cylinder. The device discharges water content contained in the kitchen waste slurry to the outer side of the screen cylinder through a dehydration hole, and discharges solid content contained in the kitchen waste slurry from an exhaust port 12 located above the screen cylinder during the kitchen waste slurry moves from a lower part to an upper part of the screen cylinder. This device comprises a lip material 13, which surrounds the whole circumference of a screw shaft 9a and suppresses discharge of the solid content from the exhaust port, at the exhaust port.SELECTED DRAWING: Figure 2

Description

The present invention relates to a solid-liquid separation and recovery device that removes water contained in a kitchen waste slurry discharged from a disposer.

A disposer is a device that crushes kitchen waste with a rotary blade and mixes it with water to generate kitchen waste slurry and discharge it. Generally, the kitchen waste slurry discharged from the disposer is discharged to the sewerage system, but the discharge of the kitchen waste slurry may be regulated by the rules of the local government that manages the sewerage system. In such a case, a solid-liquid separation / recovery device is placed downstream of the disposer to take out water from the kitchen waste slurry, discharge only the water to the sewer, and separately treat the solid content in the kitchen waste slurry. ing.

The applicant of the present application has already applied for patents for a plurality of inventions relating to a solid-liquid separation and recovery device. Patent Document 1 is a published publication relating to one of the patent applications relating to the solid-liquid separation and recovery device by the applicant of the present application.

The solid-liquid separation / recovery device described in Patent Document 1 includes a screen cylinder having a large number of dehydration holes surrounding a screw shaft for transferring a kitchen waste slurry, a holding lid attached to the discharge port of the screen cylinder with a hinge, and the holding. It is equipped with a spring that presses the lid against the screen cylinder with a predetermined pressing force. In this solid-liquid separation and recovery device, the holding lid functions as a resistance member that resists the movement of the kitchen waste slurry in the screen cylinder, so that the kitchen waste slurry is compressed between the screw shaft and the holding lid and included in the kitchen waste slurry. Moisture is squeezed out. Then, the water squeezed out from the kitchen waste slurry is discharged to the lower part of the screen cylinder through the dehydration hole. As a result, the dehydrated kitchen slurry, that is, the solid content in the kitchen slurry, pushes up the holding lid and is discharged from the upper end of the screen cylinder.

Japanese Unexamined Patent Publication No. 2004-276406

In a solid-liquid separation / recovery device equipped with a holding lid, if a large amount of kitchen waste slurry is thrown in at one time, the holding lid may be caught in the gap between the holding lid and the upper end of the screen cylinder, and the holding lid may not be closed. .. In addition, the kitchen is easily pinched near the hinge that rotates and supports the holding lid, and when the kitchen is caught in such a part, a large gap is created between the holding lid and the upper end of the screen cylinder at the part away from the hinge of the holding lid. .. As a result, the holding lid no longer functions as a resistance member that resists the movement of the kitchen waste slurry, so that there is a problem that sufficient dehydration cannot be performed. As described above, the conventional solid-liquid separation / recovery device provided with the holding lid has a problem that dehydration failure is likely to occur.

The present invention has been made in view of the above problems, and is a solid-liquid separation / recovery device that removes water from the kitchen waste slurry discharged from the disposer to extract solids, and is a solid-liquid separation / recovery device that is less likely to cause dehydration failure. It provides a separation and recovery device.

The solid-liquid separation / recovery device according to the present invention screens a screen cylinder in which a plurality of dehydration holes are bored, and a kitchen slurry which is arranged coaxially with the screen cylinder inside the screen cylinder and flows into the lower part of the screen cylinder. A screw that lifts to the top of the cylinder, with a screw that includes a screw shaft and a strip that is spirally wound around the screw shaft, while the kitchen waste slurry moves from the bottom to the top of the screen cylinder. In a solid-liquid separation and recovery device that discharges the water contained in the slurry to the outside of the screen cylinder through the dehydration hole and discharges the solid matter contained in the kitchen waste slurry from the discharge port arranged above the screen cylinder, at the discharge port. It is provided with a lip material that surrounds the screw shaft all around and suppresses the discharge of solid matter from the discharge port.

The lip material may be one in which one end is fixed to the outer edge of the discharge port and the other end is in contact with the side surface of the screw shaft. Further, a spring element may be provided that urges the other end of the lip material in a direction of contacting the side surface of the screw shaft.

The screw shaft may be provided with a tapered portion at the upper end thereof whose diameter gradually decreases toward the tip, and the other end of the lip material may be brought into contact with the tapered portion of the screw shaft.

The lip material may be attached to the outlet via a hinge. Further, the lip material may have one end fixed to the screw shaft and the other end abutting on the inner surface of the discharge port. Further, the lip material may be divided into a plurality of small pieces by a plurality of slits radially extending from the center of rotation of the screw shaft.

The lip material may be made of an elastic material. Further, the lip material may be made of a rubber material. Further, the lip material may be made of a metal plate. Further, the lip material may be made of a stainless steel plate.

According to the present invention, the lip material that presses the kitchen waste slurry discharged from the upper end of the screen cylinder surrounds the outer circumference of the screw shaft over the entire circumference, so that the kitchen waste slurry is surrounded by the entire circumference of the screw shaft. Can be pressed with even force. Therefore, the pressing force is insufficient in a part of the outer circumference of the screw shaft, and dehydration failure does not occur. That is, according to the present invention, it is possible to suppress the occurrence of dehydration failure in the solid-liquid separation / recovery device and efficiently separate water from the kitchen waste slurry.

It is sectional drawing of the solid-liquid separation and recovery apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the structure of the main body part included in the solid-liquid separation and recovery apparatus which shown in FIG. It is a figure which shows the structure of the lip material attached to the main body part which is shown in FIG. 2, (A) is the arrow view which looked at the lip material from the direction indicated by arrow A in FIG. 2, (B). Is a cross-sectional view showing the lip material cut along the plane shown by the BB'line in FIG. 3 (A). It is a figure which shows the structure of the lip material which concerns on the modification 1, and is the cross-sectional view which conforms to FIG. 3 (B). It is a figure which shows the structure of the lip material which concerns on the modification 2, and is the cross-sectional view which follows FIG. 3 (B). It is a figure which shows the structure of the lip material which concerns on the modification 3, and is the sectional view which follows FIG. 3 (B). It is a figure which shows the structure of the lip material which concerns on the modification 4, and is the cross-sectional view which conforms to FIG. 3 (B). It is a figure which shows the structure of the lip material which concerns on modification 5, FIG. 3A is a plan view which conforms to FIG. 3A, and FIG. 3B is a sectional view which conforms to FIG. 3B. It is a figure which shows the structure of the lip material which concerns on the modification 6, and is the cross-sectional view which conforms to FIG. 3 (B). It is a figure which shows the structure of the lip material which concerns on the modification 7, (A) is the plan view which conforms to FIG. 3 (A), (B) is a sectional view which conforms to FIG. 3 (B).

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of the solid-liquid separation / recovery device 1 according to the embodiment of the present invention. Further, FIG. 2 is a cross-sectional view showing a detailed configuration of the main body 3 of the solid-liquid separation / recovery device 1.

The solid-liquid separation / recovery device 1 is a device that separates and recovers a solid component from a kitchen waste slurry discharged from a disposer (not shown). As shown in FIG. 1, the solid-liquid separation / recovery device 1 includes a main body portion 3 obliquely fixed inside the housing 2, and a control device 4 arranged inside the housing 2. An electric motor 5 is attached below the main body 3, and a duct 6 is attached above the main body 3. The electric motor 5 is controlled by the control device 4 and operates by the electric power supplied from the control device 4.

As shown in FIG. 2, the main body 3 includes an outer cylinder 7, a screen cylinder 8 arranged inside the outer cylinder 7, and a screw 9 arranged inside the screen cylinder 8. The outer cylinder 7 is a cylindrical part manufactured by processing a stainless steel pipe material. There is a drainage port 10 below the outer cylinder 7, and a drainage pipe (not shown) is connected to the drainage port 10. The screen cylinder 8 is a hollow cylinder formed by punching a thin stainless steel plate with a press to perforate a large number of dehydration holes (not shown) and then molding the screen cylinder into a cylindrical shape. A supply port 11 is formed at the lower end of the screen cylinder 8, and a discharge port 12 is formed at the upper end. The supply port 11 projects to the outside of the outer cylinder 7, is connected to a pipe (not shown), and the kitchen waste slurry conveyed through the pipe flows into the screen cylinder 8 from the supply port 11.

The screw 9 is formed by spirally winding a stainless steel strip 9b around a screw shaft 9a and welding it. The screw shaft 9a penetrates the bottom plate 7a of the outer cylinder 7, projects downward from the outer cylinder 7, and is connected to an output shaft (not shown) of the electric motor 5.

As shown in FIG. 2, a lip material 13 is attached to the outside of the discharge port 12 of the screen cylinder 8. The lip material 13 is a member made of a rubber material and capable of elastic deformation. Here, a detailed configuration of the lip material 13 will be described with reference to FIGS. 3 (A) and 3 (B). 3 (A) is a view of the lip material 13 as viewed from the direction indicated by the arrow A in FIG. 2, and FIG. 3 (B) shows the lip material 13 in FIG. 3 (A) along the BB'line. It is sectional drawing which shows by cutting in the plane shown by.

As shown in FIG. 3A, the lip material 13 is a member formed in an annular shape in a plan shape, and surrounds the screw shaft 9a over the entire circumference. Further, the lip material 13 is formed with eight slits 13a. The slits 13a are arranged radially from the center of the screw shaft 9a, and the tip portion of the lip material 13 is divided into eight small pieces. Further, a metal reinforcing material 14 is attached to the outer edge of the lip material 13 to prevent deformation of the lip material 13 at the outer edge. Further, as shown in FIG. 3B, one end of the lip material 13 is fixed to the portion of the duct 6 forming the outer edge of the discharge port 12 by a bolt 15. The other end of the lip material 13 is in contact with the side surface of the screw shaft 9a. Further, as shown in FIG. 3B, the cross-sectional shape of the lip material 13 is thickened at the base portion fixed to the duct 6 and thinned toward the tip portion abutting on the side surface of the screw shaft 9a. There is. As a result, the cross-sectional shape of the lip material 13 is V-shaped as a whole.

By the way, in the device shown in FIG. 2, when the screw 9 is rotationally driven by the electric motor 5, the kitchen waste slurry that has flowed into the inside of the screen cylinder 8 through the supply port 11 rises in the screen cylinder 8 and is discharged. It is pushed up toward the exit 12. Then, the pushed-up kitchen slurry presses the lip material 13 in the direction indicated by the arrow P in FIG. 3B, and as a result, the portion of the tip of the lip material 13 that comes into contact with the side surface of the screw shaft 9a is indicated by the arrow d. Displace in the direction indicated by. However, since the lip material 13 tries to return to its original shape due to its own elasticity, the displacement of the lip material 13 in the direction indicated by the arrow d is limited. Therefore, the size of the gap formed between the tip of the lip material 13 and the side surface of the screw shaft 9a is limited. As a result, the amount of kitchen waste that passes through the discharge port 12 is limited, so that the kitchen waste slurry that has flowed into the screen cylinder 8 through the supply port 11 is compressed inside the screen cylinder 8.

When the kitchen waste slurry is compressed inside the screen cylinder 8, the water contained in the kitchen waste slurry is discharged to the outside of the screen cylinder 8 through a large number of dehydration holes formed on the side surface of the screen cylinder 8. It flows into the gap between the cylinder 8 and the outer cylinder 7. Moisture that has flowed into the gap between the screen cylinder 8 and the outer cylinder 7 is discharged to the outside of the main body 3 through the drain port 10.

In this way, most of the water contained in the kitchen waste slurry that has flowed into the screen cylinder 8 through the supply port 11 is separated, and the kitchen waste slurry is dehydrated. Further, the dehydrated kitchen waste, that is, the solid matter contained in the kitchen waste slurry is discharged into the duct 6 through the gap formed between the tip of the lip material 13 and the side surface of the screw shaft 9a, and the duct 6 is discharged. Through, it is discharged to the outside of the solid-liquid separation / recovery device 1.

As described above, in the solid-liquid separation / recovery device 1, the lip material 13 functions as a resistance member that hinders the movement of the kitchen waste slurry passing through the screen cylinder 8. By providing the lip material 13 that functions as a resistance member in the discharge port 12 of the screen cylinder 8, the kitchen waste slurry passing through the screen cylinder 8 can be compressed and the water content contained in the kitchen waste slurry can be squeezed out.

Further, the lip material 13 has an annular planar shape and is in contact with the entire circumference of the side surface of the screw shaft 9a. Therefore, the size of the gap generated between the lip material 13 and the side surface of the screw shaft 9a is substantially equal on the entire circumference of the side surface of the screw shaft 9a. Therefore, a large gap is generated in a specific portion, the function as a resistance member is reduced, and as a result, dehydration failure does not occur.

(Modification example 1)
The lip material 13 is not limited to the one having the above structure. For example, as shown in FIG. 4, the tip of the lip material 13 surrounds the entire circumference of the screw shaft 9a, and the tip of the lip material 13 is in the direction indicated by the arrow Q, that is, the tip of the lip material 13 is the screw shaft 9a. An annular spring member 16 may be provided that urges the spring member 16 to approach. The spring member 16 is a specific example of the spring element of the present invention.

(Modification 2)
As shown in FIG. 5, in the vicinity of the upper end of the screw shaft 9a, the diameter of the cross-sectional shape may be gradually reduced as it approaches the end portion. That is, a tapered portion may be formed near the upper end of the screw shaft 9a. Then, the tip of the lip material 13 may come into contact with the tapered portion.

(Modification 3)
The lip material 13 is not limited to one in which the base portion is fixed to a portion forming the outer edge of the discharge port 12 of the duct 6 and the tip end abuts on the screw shaft 9a. As shown in FIG. 6, the lip material 13 may have a base portion fixed to the end surface of the screw shaft 9a and a tip end contacting the inner surface of the discharge port 12.

(Modification example 4)
As shown in FIG. 7, the lip material 13 may have a base attached to the duct 6 by a hinge 17 and a bolt 15. If such a configuration is selected, the lip material 13 can be separated from the screw shaft 9a by removing the bolt 15 and swinging the lip material 13 around the hinge 17, as shown by the broken line in FIG. .. Therefore, for example, when a foreign matter is caught between the lip material 13 and the screw shaft 9a, it becomes easy to clean the lip material 13. It also facilitates recovery after maintenance.

(Modification 5)
The lip material 13 is not limited to a material having a V-shaped cross section made of a rubber material. As shown in FIGS. 8A and 8B, a flat plate of a thin stainless steel plate having an annular planar shape may be used as the lip material 13. Further, also in this case, the lip material 13 may be provided with the slit 13a.

(Modification 6)
Even when the flat plate of a thin stainless steel plate having an annular flat shape is used as the lip material 13, the lip material 13 may be attached to the duct 6 with a hinge 17 and a bolt 15 as shown in FIG. .. If such a configuration is selected, the lip material 13 can be separated from the screw shaft 9a by removing the bolt 15 and swinging the lip material 13 around the hinge 17, as shown by the broken line in FIG. .. Therefore, for example, when a foreign matter is caught between the lip material 13 and the screw shaft 9a, it becomes easy to clean the lip material 13. It also facilitates recovery after maintenance.

(Modification 7)
The lip material 13 made of a thin plate of stainless steel is not limited to one made of a single flat plate having an annular planar shape. As shown in FIGS. 10A and 10B, a plurality of strip pieces 13b having a fan-shaped planar shape are arranged radially to form a lip material 13 having an annular planar shape as a whole. You may do so.

As described above, according to the above-described embodiment and each modification, the lip material 13 has an annular planar shape and surrounds the entire circumference of the screw shaft 9a in the cross-sectional shape. Therefore, the size of the gap generated between the lip material 13 and the screw shaft 9a or between the lip material 13 and the discharge port 12 is substantially equal over the entire circumference of the cross-sectional shape of the screw shaft 9a. Therefore, a large gap is not generated in a specific portion, and the function as a resistance member is not reduced. As a result of the reduced function as a resistance member, dehydration failure does not occur.

The technical scope of the present invention is not limited to the above-described embodiment and each modification. The present invention can be freely applied, modified, or improved as long as the technical idea shown in the claims is concerned.

For example, in the above-described embodiment and the modified examples 1, 2 and 4, the example in which the base portion of the lip material 13 is fixed to the duct 6 is shown, but the member to which the base portion of the lip material 13 is fixed is limited to the duct 6. Not done. In the above-described embodiment and the modified examples 1, 2 and 4, it is sufficient that the base portion of the lip material 13 is fixed to the outer edge of the discharge port 12, and the specific member to which the base portion of the lip material 13 is fixed is limited. Not done. For example, the lip material 13 may be fixed to the outer cylinder 7. The lip material 13 may be fixed to the duct 6 or the outer cylinder 7 via another component (not shown).

Further, in the modified example 3, the example in which the tip of the lip material 13 abuts on the inner surface of the discharge port 12 formed in the duct 6 is shown, but the member with which the tip of the lip material 13 abuts is limited to the duct 6. Not done. In the third modification, the surface with which the tip of the lip material 13 comes into contact is sufficient as long as it is the inner surface of the discharge port 12, and the specific member with which the tip of the lip material 13 comes into contact is not limited. For example, the surface with which the tip of the lip material 13 comes into contact may be the inner surface of the outer cylinder 7.

Further, in the above embodiment, the example in which the lip material 13 is provided with the slit 13a is shown, but the slit 13a is an optional component. Therefore, the lip material 13 may not have the slit 13a. Further, the reinforcing material 14 is also an optional component, and the solid-liquid separation / recovery device 1 may not include the reinforcing material 14.

It should be noted that each drawing is a conceptual explanatory view, and the shape and dimensions of each member constituting the solid-liquid separation / recovery device 1 are not limited to those shown in the drawings. In particular, the shape and dimensions of the lip material 13 are not limited to those shown in each drawing.

Further, in the above embodiment, the rubber material is exemplified as a specific example of the elastic material constituting the lip material 13, but the elastic material constituting the lip material 13 is not limited to the rubber material. The lip material 13 can be composed of various synthetic resin materials, metallic materials, non-metallic materials, and composite materials. Further, the lip material 13 is not limited to the one whose thickness changes depending on the portion. Further, in the modified examples 5, 6 and 7, the example in which the lip material 13 is formed of a thin plate of stainless steel having an annular flat shape is shown, but the stainless steel may be spring steel. Further, the material of the thin plate constituting the lip material 13 is not limited to stainless steel. The material of the thin plate may be another metal material or a non-metal material. The material of the thin plate may be a synthetic resin material or a composite material.

1 Solid-liquid separation and recovery device, 2 housing, 3 main body, 4 control device, 5 electric motor, 6 duct, 7 outer cylinder, 7a bottom plate, 8 screen cylinder, 9 screw, 9a screw shaft, 9b strip plate, 10 drainage port , 11 Supply port, 12 Discharge port, 13 Lip material, 13a slit, 13b strip piece, 14 Reinforcing material, 15 bolt, 16 Spring member, 17 Hinge

Claims (11)

A screen cylinder with multiple dehydration holes and
A screw that is arranged coaxially with the screen cylinder inside the screen cylinder and lifts the kitchen waste slurry flowing into the lower part of the screen cylinder to the upper part of the screen cylinder, and is spiral around the screw shaft and the screw shaft. With a screw with a strip wrapped around it,
While the kitchen slurry moves from the lower part to the upper part of the screen cylinder, the water contained in the kitchen slurry is discharged to the outside of the screen cylinder through the dehydration hole, and the solid matter contained in the kitchen slurry is discharged from the screen. In the solid-liquid separation and recovery device that discharges from the discharge port located above the cylinder,
The discharge port includes a lip material that surrounds the screw shaft over the entire circumference and suppresses the discharge of the solid matter from the discharge port.
Solid-liquid separation and recovery device. One end of the lip material is fixed to the outer edge of the outlet, and the other end is in contact with the side surface of the screw shaft.
The solid-liquid separation / recovery device according to claim 1. A spring element that urges the other end of the lip material in a direction that abuts the side surface of the screw shaft.
The solid-liquid separation / recovery device according to claim 2. The screw shaft is provided with a tapered portion at the upper end thereof whose diameter gradually decreases toward the tip.
The other end of the lip material is in contact with the tapered portion of the screw shaft.
The solid-liquid separation / recovery device according to claim 2 or 3. The lip material is attached to the outlet via a hinge.
The solid-liquid separation / recovery device according to any one of claims 1 to 4. One end of the lip material is fixed to the screw shaft, and the other end is in contact with the inner surface of the discharge port.
The solid-liquid separation / recovery device according to claim 1. The lip material is divided into a plurality of small pieces by a plurality of slits extending radially from the center of rotation of the screw shaft.
The solid-liquid separation / recovery device according to any one of claims 1 to 6. The lip material is made of an elastic material.
The solid-liquid separation / recovery device according to any one of claims 1 to 7. The lip material is made of a rubber material.
The solid-liquid separation / recovery device according to claim 8. The lip material is made of a metal plate.
The solid-liquid separation / recovery device according to any one of claims 1 to 7. The lip material is made of a stainless steel plate.
The solid-liquid separation / recovery device according to claim 10.

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