JP6746853B2 - Screen transfer device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a residue transfer device for transferring the residue removed from sewage by piping in a sand basin facility such as a sewage treatment plant or a pump station. More specifically, the present invention relates to a residue transfer device having a function of crushing residue, which can efficiently guide residue to a crusher with a small amount of water.

In sedimentation basin facilities such as sewage treatment plants and pumping stations, screen residues in sewage are collected by bar screens, etc. and scraped from the sedimentation basins by rakes. The scraped off residue is put into a residue mixing tank through a crusher. The screen residue mixing tank is further supplied with water to mix the crushed screen residue with water. The mixed water of the crushed residue and water is pipe-transferred by the power of the pump and conveyed to the residue separation tank. Such a residue transporting device needs to constantly supply a large amount of water to the residue mixing tank, which is uneconomical and cannot be adopted if sufficient water cannot be supplied.

On the other hand, for example, in Patent Document 1, in a residue transfer method in which mixed water of residue and water is transferred to a cleaning tank, and the residue is taken out from the cleaning tank and discharged, A method of returning to mixed water is disclosed. As a result, it is possible to transport the residue even in a place where it is not necessary to replenish the water and sufficient replenishment water cannot be obtained.

JP, 2002-239596, A

In the residue transfer device that transfers the mixed water of residue and water by the power of a pump or the like, there is a problem that the residue accumulates at the bottom of the mixing section that mixes residue and water.
Therefore, an object of the present invention is to promote the transportation of the residue in the mixing section for mixing the residue with water in the residue transfer device for transferring the residue by the power of a pump or the like.

The present inventor, as a result of diligent study on the above problems, forms a flow of separated water for conveying the residue in the mixing part when circulating the separated water separated from the mixed water of the residue and water to the mixing part. The present invention has been completed by finding that the transport of the residue in the mixing section can be promoted by doing so.
Specifically, the present invention provides the following residue transfer device.

The residue transfer device of the present invention for solving the above-mentioned problems is a mixing section for mixing residue and water, a separation section for separating the mixed water treated in the mixing section into residue and separated water, and the separation. A circulation path for circulating the separated water separated in the mixing section to the mixing section, and forming a flow of the separated water for conveying the residue in the mixing section.
According to this residue transfer device, when circulating the separated water to the mixing section, a flow of the separated water for transferring the residue is formed in the mixing section, which facilitates the transfer of the residue in the mixing section. can do.
In addition, since the separated water separated from the mixed water is used to convey the residue in the mixing section, it is not necessary to constantly supply a large amount of water, and it can be used even when the water supply is insufficient. Is.

Further, according to one embodiment of the residue transport apparatus of the present invention, a crushing unit for crushing the residue is provided outside the mixing unit, and the residue crushed by the crushing unit is formed in the mixing unit. It has the feature of being injected into the separated water stream.
According to this feature, since the screen residue is crushed by the crushing section, the transfer of the screen residue in the mixing section can be further promoted.

Further, the residue transfer device of the present invention for solving the above problems, a mixing unit for mixing residue and water, a mixed water treated in the mixing unit, a separation unit for separating residue and separated water, A circulation path for circulating the separated water separated by the separation section to the mixing section, a crushing section for crushing residue in the mixing section, and the circulation path includes the crushing section for separating the separated water. It is characterized in that it is circulated to the inflow side of the screen residue.
According to this feature, since the separated water circulated on the inflow side of the crushing portion flows into the crushing portion, the residue can be guided to the crushing portion.

Further, the residue transfer device of the present invention for solving the above problems, a crushing unit for crushing residue, a mixing unit for mixing residue and water, the crushing unit and the mixed water treated in the mixing unit. A separation unit for separating the crushed residue and separated water, a circulation path for circulating the separated water separated by the separation unit to the mixing unit, and a water replenishment unit for supplying water to the mixing unit. Characterize.
According to this residue transfer device, the amount of water in the mixing part can be increased by replenishing water to the mixing part, so that the transfer of the residue in the mixing part is promoted even when the circulation amount of the separated water decreases. be able to.

Further, according to one embodiment of the residue transporting apparatus of the present invention, the water replenishing section has a feature that it can store water.
According to this feature, when the water in the mixing section is insufficient, the stored water can be replenished, so that the water can be replenished quickly.

Further, according to one embodiment of the residue transporting apparatus of the present invention, it is characterized in that it is provided with a control section for controlling the water level of the mixing section.
According to this feature, since the amount of water necessary for transporting the residue in the mixing section is maintained, it is possible to realize stable residue transfer.

According to the residue transfer apparatus of the present invention, since the separated water separated from the mixed water is used to transfer the residue in the mixing section, the residue transfer can be promoted without using a large amount of water. .. Further, by forming a flow of separated water for transporting the residue in the mixing section and supplying water necessary for transporting the residue, it is possible to further promote the transportation of residue in the mixing section. it can.

It is a schematic explanatory drawing which shows the structure of the residue transfer apparatus of the 1st Example of this invention. It is a schematic explanatory drawing which shows the structure of the residue transfer apparatus of the 2nd Example of this invention. It is a schematic explanatory drawing which shows the structure of the residue transfer apparatus of the 3rd Example of this invention. It is a schematic explanatory drawing which shows the structure of the residue transfer apparatus of the 4th Example of this invention. It is a schematic explanatory drawing which shows the structure of the residue transfer apparatus of the 5th Example of this invention.

In sedimentation basin facilities such as sewage treatment plants and pumping stations, wastewater in the sewage is collected by a bar screen or the like and is raked up from the sedimentation basin by rakes. Conventionally, a conveyor or the like has been used to convey the scraped residue, but there are problems such as scattering of sewage and leakage of odor. The residue transfer device of the present invention is a residue transfer device that transfers the residue removed from sewage by piping with a pump or the like. According to this residue transfer device, since it is transferred by piping, it is possible to prevent scattering of sewage and leakage of odor.

Hereinafter, an embodiment of a residue transfer device of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic explanatory view showing the configuration of a residue transfer device 1A according to the first embodiment of the present invention. As shown in FIG. 1, the residue transfer device 1A is installed inside the mixing section 2A for mixing residue and water into which residue and water are added, and a crushing section 3A for crushing residue. , A separation unit 4 for separating mixed water of crushed residue and water (hereinafter referred to as “mixed water”) into residue and separated water, and the separated water discharged from the separating unit 4 is circulated to the mixing unit 2A. This is a configuration including a circulation path L1. The circulation path L1 is installed on the screen residue inflow side of the crushing section 3A and configured so that the separated water flows into the crushing section 3A. Therefore, the screen residue in the mixing section 2A can be guided to the crushing section 3A. ..
In addition, the residue transfer apparatus 1A according to the first embodiment of the present invention includes a water replenishing unit 5 that replenishes the mixing unit 2A with water.

[Mixing part]
The mixing unit 2A has a configuration for mixing residue and water, and stores water up to a predetermined water level. The residue scraped up from the sand basin is put into the mixing section 2A by the residue discharger and mixed with water. In the mixing section 2A, in addition to the separated water separated from the residue in the separating section 4, water is supplied from the water replenishing section 5 as needed.

In the residue transfer device 1A of the present invention, a flow of separated water for transferring residue is formed inside the mixing section 2A. The flow direction of the separated water is toward the crushing unit 3A installed inside the mixing unit 2A, and the flow of the separated water conveys the residue collected at the bottom of the mixing unit 2A to the crushing unit 3A. be able to. The flow direction of the separated water is not particularly limited, and is appropriately set according to the method of treating the residue on the residue transport device. For example, when the crushing unit is installed outside the mixing unit, a flow of separated water may be formed in the direction of the mixed water discharge unit 22 where the mixed water is discharged from the mixing unit.

The means for forming the flow of the separated water is not particularly limited, and for example, a pump for circulating the separated water in the circulation path L1 or the use of energy such as gravity or the input of the separated water for introducing the separated water. A height difference may be provided between the mixing section and the mixed water discharge section for discharging the mixed water to utilize the potential energy in the mixing section, or a device for forming a flow by power such as a screw may be provided in the mixing section. Further, a pump or the like for transferring the mixed water discharged from the mixed water discharge part 22 to the separation part 4 by supplying the separated water from a position separated from the mixed water discharge part 22 without providing a stirring device in the mixing part. It is also possible to form a flow of separated water in the mixing section by the action of.

In the residue transport apparatus 1A of the first embodiment of the present invention, the flow of separated water is formed near the bottom of the mixing section 2A by utilizing the energy for circulating the separated water in the circulation path L1. As a specific configuration, the separation unit 4 is installed on the ground, and the separation unit 4 and the mixing unit 2A provided underground are connected by a circulation path L1 including a pipe. Then, the separated water can be circulated from the separation unit 4 to the circulation path L1 by the potential energy of the mixing unit 2A. Any energy may be used as the energy for circulating the separated water in the circulation path L1, and a pump or the like may be used.

Further, as shown in FIG. 1, the pipe forming the circulation path L1 is extended to near the bottom of the mixing section 2A, and the end of the pipe is bent toward the crushing section 3A to separate water into the separated water charging section 21A. Is formed. Thereby, the flow of the separated water can be formed near the bottom of the mixing section 2A by using the energy for circulating the separated water in the circulation path L1, and the residue collected at the bottom can be conveyed toward the crushing section 3A. .. The separated water charging section may be configured in any manner, for example, a discharge section in which the diameter of the end of the pipe is reduced in order to increase the ejection pressure, or the separated water flow is wide in the width direction of the mixing section 2A. In order to form it, the end of the pipe may be a discharge part whose diameter is expanded in the width direction of the mixing part 2A, or a discharge part branched in the width direction of the mixing part 2A.
In addition, in the residue transporting apparatus 1A of the first embodiment, the separated water input portion 21A having a bent end of the pipe is formed, but the direction of the end of the pipe is not particularly limited, and the pipe is linear. Alternatively, the separated water may be added in the vertical direction. Further, although the separated water input part 21A is submerged in water, the end of the pipe may be installed above the water surface.

A water level gauge S is provided in the mixing section 2A, and the water level is controlled by the control section. When the water level increases, the water is drained by overflow from the drainage section 23 provided at the upper part of the mixing section 2A. Further, when the water level is lowered, it is detected by the water level gauge S, a command is sent from the control section to the water replenishment section 5, and water is replenished to the mixing section 2A. As a result, the amount of water necessary for transporting the residue in the mixing section 2A is maintained, so that stable residue transfer can be realized.

[Water supply section]
The water replenishing unit 5 is configured to replenish water to the mixing unit 2A when the water in the mixing unit 2A is insufficient or when the water in the mixing unit 2A is replaced. Any kind of water may be used as the water supplied from the water supply unit 5 to the mixing unit 2A, for example, treated water generated from a water treatment facility such as a sewage treatment plant, a water purification plant, or a pump station, or agricultural water. Water such as industrial water and tap water are used. In addition, drainage discharged from the residue transfer device of the present invention may be used.

The water replenishing section 5 may take in water from tap water or clean water via a pipe, but it is preferable that the water replenishing section 5 includes a make-up water layer 5a capable of storing water. As a result, when the water in the mixing unit 2A is insufficient, the stored water can be replenished, so that the water can be replenished quickly. Further, even when the water in the mixing section 2A is exchanged, it is possible to start up early and the maintenance work becomes easy.

Further, as shown in FIG. 1, water may be supplied from the water replenishing section 5 to the circulation path L1. According to this configuration, since a strong flow of separated water is formed, it is possible to further promote the conveyance of the residue in the mixing section 2A. Water may be supplied to the circulation path L1 via the makeup water tank 5a.

[Crushing part]
The crushing unit 3A is used to crush the residue. By crushing the screen residue, the transport of the screen residue in the mixing section 2A can be further promoted. Further, the residue is metal or plastic contained in sewage or sewage, fibers such as underwear, rag, absorbent cotton, etc.These residues are those of the pump, dehydrator, stirrer, etc. It may get entangled in the equipment and cause malfunction. Therefore, by crushing the residue by the crushing unit 3A, it is possible to prevent equipment failure and the like. Further, by crushing the residue, the cleaning efficiency in the residue cleaning step can be improved.

The crushing unit may be installed at any position. For example, like the crushing unit 3A of the first embodiment, the crushing unit is installed inside the mixing unit 2A, and a residue is put into the mixing unit. You may install a crushing part in the waste residue input port.

Any type of crusher may be used as the crusher constituting the crushing section, and for example, a biaxial crusher having a drive shaft provided with a plurality of crushing blades may be used. When installing the crushing unit inside the mixing unit, a vertical twin-shaft crusher with a drive shaft standing upright is preferable.The vertical two-axis crusher drives the bottom of the mixing unit installation position. It is particularly preferable that the shaft is erected vertically. Further, when the crushing section is installed outside the mixing section, a horizontal biaxial crusher in which the drive shaft is installed in the horizontal direction is preferable.

The mixed water of the residue and water crushed by the crushing unit 3A is discharged from the mixed water discharging unit 22. The mixed water discharged from the mixing section 2A is conveyed to the separating section 4 by the pump P through the mixed water conveyance path L2. Further, the mixed water conveying path L2 is branched, and a mixed water returning path L3 for returning the mixed water to the mixing section 2A is provided. According to the mixed water return passage L3, the pump P of the mixed water conveyance passage L2 can be maintained in a driven state when the separation unit 4 is temporarily stopped. It is also possible to promote the flow of separated water in the mixing section 2A.

The mixed water return passage L3 may be directly or branched and connected to the circulation passage L1. As a result, the returned mixed water is used to form the flow of the separated water, so that it is possible to further promote the transportation of the residue collected on the bottom of the mixing section 2A.

[Separator]
The separation unit 4 is configured to separate the mixed water into crushed residue and separated water. The separation unit 4 may be any device as long as it is a device for solid-liquid separation, and examples thereof include a drum type filtration device and a centrifugal separation device.
The separated water separated by the separation unit 4 is circulated to the mixing unit 2A through the circulation path L1 and forms the separated water flow in the mixing unit 2A as described above. On the other hand, the screen residue separated by the separation unit 4 is processed by a dehydrator, a screen residue cleaning machine, or the like.

(Second embodiment)
FIG. 2 is a schematic explanatory view showing the configuration of the residue transfer device 1B according to the second embodiment of the present invention. The residue transfer apparatus 1B includes a mixing section 2B having an inclined bottom surface, and a vertical biaxial crusher installed vertically inside the mixing section 2B in a direction substantially perpendicular to the inclined bottom surface. Is. Further, the end of the circulation path L1 is connected to one side of the mixing section 2B (left side in FIG. 2) to form the separated water input section 21B. The separated water input from the separated water input unit 21B flows toward the mixed water discharge unit 22 provided on the other side (right side in FIG. 2) of the mixing unit 2A, so that the separated water enters the mixing unit 2A. Can be formed.

(Third embodiment)
FIG. 3 is a schematic explanatory diagram showing the configuration of a residue transfer device 1C according to the third embodiment of the present invention. In this residue transfer apparatus 1C, a horizontal biaxial crusher is used as the crushing section 3B, and the crushing section 3B is installed outside the mixing section 2C. Then, the residue is crushed by the crushing section 3B and then put into the mixing section 2C. According to this configuration, since the residue is crushed and reduced in size, there is an effect that it is hard to collect at the bottom of the mixing section 2C.

Further, in the separated water input unit 21A, as in the first embodiment, the pipe forming the circulation path L1 extends to near the bottom of the mixing unit 2C, and the end of the pipe is directed toward the mixed water discharge unit 22. It is refracted toward. Since the separated water input unit 21A inputs the separated water in the direction of the mixed water discharge unit 22, it has an action of drawing the water on the side opposite to the discharge unit of the separated water input unit 21A in the flow direction of the separated water. Therefore, the separated water flow F2 is also formed downstream of the separated water input unit 21A in the separated water flow direction. Therefore, although the crushing unit 3B is installed on the downstream side in the flow direction of the separated water with respect to the separated water input unit 21A, the conveyance of the residue is promoted.

(Fourth embodiment)
FIG. 4 is a schematic explanatory diagram showing the configuration of the residue transfer device 1D according to the fourth embodiment of the present invention. The residue transfer device 1D is configured such that the piping of the circulation path L1 of the residue transfer device 1C of the third embodiment is branched and a part of the circulated separated water is introduced into the crushing section 3B. According to this configuration, the water flow (F2) on the downstream side in the flow direction of the separated water from the separated water input unit 21A is strengthened, so that the conveyance of the residue can be further promoted.

(Fifth embodiment)
FIG. 5 is a schematic explanatory view showing the configuration of the residue transfer device 1E according to the fifth embodiment of the present invention. The residue transfer device 1E has a configuration in which the position of the crushing section 3B of the residue transfer device 1C of the third embodiment is installed on the upstream side in the flow direction of the separated water from the separated water input part 21A. According to this configuration, since the residue is put into the region where the flow of the separated water is strong, the accumulation of residue on the bottom surface of the mixing unit 2D is suppressed, and the transportation of residue can be further promoted.

The residue transfer device of the present invention can be used for transferring residues in a water treatment facility such as a sewage treatment plant, a water purification plant, and a pumping station. Since the residue transfer device of the present invention circulates and uses the separated water, it can be suitably used in a pumping station or the like where water is scarce.

1A, 1B, 1C, 1D, 1E Screen transfer device, 2A, 2B, 2C, 2D Mixing part, 21A, 21B Separated water input part, 22 Mixed water discharge part, 23 Drainage part, 3A, 3B Crushing part, 4 Separation Section, 5 water replenishment section, 5a replenishment water tank, L1 circulation path, L2 mixed water conveyance path, L3 mixed water return path, S water level meter, P pump, F1, F2 separated water flow

Claims (4)

A mixing section that mixes residue and water,
A separation unit that separates the mixed water treated in the mixing unit into residue and separated water,
A circulation path for circulating the separated water separated in the separation section to the mixing section,
Inside the mixing unit, a crushing unit for crushing the residue,
The circulation path circulates the separated water to the residue inflow side of the crushing section ,
A residue transfer device, wherein a flow of the separated water for transferring residue is formed in the mixing section . A crushing section that crushes the residue,
A mixing tank that mixes residue and water,
A separation unit for separating the mixed water treated in the crushing unit and the mixing unit into crushed residue and separated water,
A circulation path for circulating the separated water separated in the separation section to the mixing section,
A water replenishing unit for replenishing the mixing unit with water ,
A residue transfer device, wherein a flow of the separated water for transferring residue is formed in the mixing section . The residue transfer device according to claim 2 , wherein the water supply unit can store water. The control unit for controlling the water level in the mixing unit, characterized by comprising a forth bookmarks residue conveying device to one of claims 1 to 3.

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