JP4146055B2 - Screen residue processing system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screen residue processing system, and in particular, the screen residue collected at a sewage treatment plant can be reliably crushed and washed hygienically with a compact facility, and easy to maintain. The present invention relates to a screen residue processing system.
[0002]
[Prior art]
Conventionally, screen residue collected at a sewage treatment plant or the like is conveyed from a belt conveyor C to a storage hopper H through a washing machine W, a dehydrator D, and a belt conveyor CO as shown in FIGS. I am doing so.
[0003]
[Problems to be solved by the invention]
As described above, the conventional screen residue processing system uses the belt conveyors C and CO for conveying the screen residue, so that not only the installation space is increased, but the bad smell generated from the screen residue is not There was a problem of deteriorating the environment.
In order to prevent this odor, it is conceivable to cover the belt conveyor with a cover. However, the belt conveyors C and CO used for transporting the screen residue are long and difficult to seal, which is expensive. When covered with a cover, there is a problem that a new problem arises that it takes time to check and repair consumable members such as rollers.
In addition, the belt conveyors C and CO have a screen residue left on the scraper Cs, which requires regular cleaning, and the screen residue that cannot be removed by the scraper on the tray provided below the belt return side. As a result, the cleaning equipment is indispensable, and a large installation space is required.
[0004]
Further, as shown in FIG. 11, water supply nozzles 21 and 22 are disposed in the treatment tank 2 in which the crusher S is disposed at the upper portion, and a jet pump J for conveying the screen residue is disposed at the lower portion. A screen residue processing system has been proposed.
However, in this screen residue processing system, since the crusher S is installed at the upper part of the processing tank, there is a risk of water scattering and water leakage. Since the amount of pumped water is small, the amount of water overflowing from the treatment tank 2 is large, so the flowing trough cannot be used, and a belt conveyor is inevitably used for transporting the screen residue. There was a problem that the capacity of the electric motor for driving the pump was increased.
[0005]
Furthermore, as shown in FIG. 12, a screen residue treatment system in which a stirrer 4 and a submersible pump P are arranged in a treatment tank 2 in which a crusher S is arranged at the upper part has been proposed.
However, in this screen residue treatment system, the crusher S is installed at the top of the treatment tank, so that it is not possible to use running troughs that may cause water scattering or water leakage. The belt conveyor must be used, and the submersible pump P disposed in the treatment tank 2 is likely to be clogged, screen residue adheres to the pump and cable, and regular cleaning is required. There was a problem of becoming.
[0006]
In view of the problems of the conventional screen residue processing system, the present invention can cleanly clean and clean the screen residue collected at a sewage treatment plant or the like with a compact facility. Another object is to provide a screen residue processing system that is easy to maintain.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the screen residue treatment system of the present invention provides a screen residue collected from a sewage treatment plant by providing a primary washing part, a crushing part and a secondary washing part in an integrally structured tank. It is characterized by comprising a processing tank that receives and receives crushing and cleaning of the screen residue, and a transfer pump that is disposed outside the processing tank and conveys the screen residue after crushing and cleaning to the outside of the processing tank.
[0008]
In this screen residue processing system, the primary cleaning unit, the crushing unit, and the secondary cleaning unit are provided in one processing tank in a compact manner, so that the screen residue to which sludge adheres can be crushed and cleaned. It can be performed consistently in a small space, and the crushing section is installed and installed in the treatment tank, so it is possible to use a running trough, and the screen residue is crushed and washed reliably with compact equipment. In combination with the fact that a transfer pump for conveying the screen residue after crushing and washing to the outside of the processing tank is disposed outside the processing tank, maintenance is facilitated.
[0009]
In this case, water supply nozzles can be disposed on the upstream side wall and bottom of the primary cleaning section of the treatment tank.
[0010]
As a result, the screen residue can be surely subjected to the first cleaning with the cleaning water sprayed from the water supply nozzle, and the screen residue can be smoothly transferred toward the crushing portion by preventing the precipitation of the screen residue. .
[0011]
In addition, a disc-type crusher configured by arranging a plurality of crushing units each having a plurality of disc-shaped cutters fixed to a rotating shaft so that the disc-shaped cutters of the crushing units overlap with each other is disposed in the crushing section of the processing tank. Can be set.
[0012]
Thereby, a loss head is small and the amount of water used for the washing | cleaning of a 2nd washing | cleaning part of a back | latter stage can be ensured.
[0013]
In this case, a disc-type screen constructed by arranging a plurality of screen units each having a plurality of discs fixed to a rotating shaft at the introduction portion of the crushing portion of the processing tank so that the discs of adjacent screen units overlap each other. The disc of the screen unit of the disc type screen adjacent to the disc type crusher and the disc-shaped cutter of the crushing unit of the disc type crusher can be arranged so as to overlap each other.
[0014]
As a result, the screen residue can be reliably guided to the crusher and crushed, and the amount of water used for cleaning the second-stage secondary washing section can be more reliably ensured.
[0015]
Moreover, a stirrer can be arrange | positioned in the upstream of the suction pipe connection part of the transfer pump of the secondary washing | cleaning part of a processing tank.
[0016]
As a result, the screen residue can be reliably cleaned, and the screen residue can be prevented from being blocked by diffusing the screen residue in water, so that the screen residue after crushing and washing can be smoothly conveyed out of the processing tank. it can.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a screen residue processing system according to the present invention will be described below with reference to the drawings.
[0018]
1 to 4 show a first embodiment of a screen residue processing system according to the present invention.
This screen residue processing system includes a flowing water trough 1 for transporting screen residue collected at a sewage treatment plant to a treatment tank 2, a treatment tank 2 for crushing and washing the screen residue, and a transfer disposed outside the treatment tank 2. It comprises a pump 5, a transfer pipe 6 and a screen residue separator 7.
[0019]
The flowing water trough 1 used to transport the screen residue to the treatment tank 2 is simple in structure, has no consumable parts, and is low in cost. Therefore, it contains a lot of moisture and sludge, is unsanitary, and has a bad odor. It is excellent for hygienically transferring screen residue that tends to occur.
[0020]
The treatment tank 2 connected to the running water trough 1 is divided into a primary washing unit 2a, a crushing unit 2b, and a secondary washing unit 2c from the connection side of the running water trough 1, and the running water trough is divided into the inside. Various devices described below are arranged so that cleaning and crushing of the screen residue containing a large amount of water and sludge supplied from 1 can be performed in an integrated manner.
[0021]
The water supply nozzles 21, 22, and 23 are disposed in the primary cleaning unit 2 a of the treatment tank 2, whereby the screen residue containing sludge is first washed by the cleaning water sprayed from the water supply nozzles 21, 22, and 23. In addition to subsequent washing, precipitation of solids is prevented and the screen residue is smoothly transferred toward the crushing part 2b.
And it is preferable to install the water supply nozzles 21, 22, and 23 on the side wall and bottom of the upstream side (side on which the screen residue is introduced) of the primary cleaning unit 2a. In this case, FIG. As shown, it is more preferable that the cleaning water sprayed from the water supply nozzles 21, 22, 23 is installed in different directions.
[0022]
A crusher 3 is installed in the crushing part 2b provided at a substantially central position of the processing tank 2, and the crusher 3 crushes the screen residue into a predetermined size, and then the screen residue is removed from the secondary washing part 2c. In the second cleaning unit 2c, the crushed screen residue is cleaned.
[0023]
In this embodiment, the crusher 3 installed in the crushing section 2b is a two-axis rotary crusher, more specifically, two crushing units in which a plurality of disk-shaped cutters 32 are fixed to the rotary shaft 31. 30 is a disc-type crusher configured by arranging the disc-shaped cutters 32 of the crushing unit 30 so as to overlap each other, and this crusher 3 is used to remove all the screen residue sent from the primary cleaning unit 2a. In order to be surely crushed, it is arranged between the guide plates 24, 24 arranged in a substantially C shape.
Thereby, a loss head is small and the amount of water used for the washing | cleaning of the 2nd washing | cleaning part 2c of a back | latter stage can be ensured.
[0024]
The crushing part 2b is configured as described above, and a plurality of pieces are provided in the introduction part of the crushing part 2b as in the second embodiment of the screen residue processing system of the present invention shown in FIGS. A disk-type screen 3A is provided, in which a plurality of screen units 30A each having a disk 32A fixed to a rotary shaft 31A are arranged so that the disks 32A of adjacent screen units 30A overlap each other. The disc 32A of the screen unit 30A of the disc-type screen 3A adjacent to the biaxial rotary crusher 3 composed of the same disc-type crusher and the disc-shaped cutter 32 of the crushing unit 30 of the crusher 3 are arranged so as to overlap each other. Can be configured.
Accordingly, the screen residue can be reliably guided to the crusher 3 and crushed, and the amount of water used for cleaning the second-stage secondary cleaning unit can be more reliably ensured.
Here, the disc type screen 3A is arranged in the oblique direction with respect to the water flow, and one guide plate 24 is arranged in the oblique direction on the upstream side of the disc type screen 3A, and the other guide plate 25 is arranged therefrom. It is arranged in the oblique direction on the downstream side, and the screen residue is guided to the crusher 3 by the guide plates 24, 25 and the disk type screen 3A, crushed, and transferred to the secondary cleaning section 2c. .
[0025]
Since the other configuration of the screen residue processing system of the second embodiment is the same as that of the first embodiment, the first embodiment will be described below again.
[0026]
In addition, the secondary cleaning section 2c of the processing tank 2 is provided with a stirrer 4 at a substantially intermediate position upstream of the connection section of the suction pipe 51 of the transfer pump 5, thereby reliably cleaning the screen residue. At the same time, the screen residue is diffused in water to prevent the transfer pump 5 from being blocked, and the screen residue can be smoothly transferred toward the screen residue separator 7.
[0027]
The stirrer 4 installed in the secondary cleaning unit 2c is configured to mechanically stir the screen residue in water and rotate a stirring blade 41 formed to perform cleaning by a motor 42. As shown in FIG. 4, it is installed on the side walls on both sides of the treatment tank 2, whereby the screen residue crushed in the crushing part 2b is forcibly stirred with the washing water present in the secondary washing part 2c, After washing, the screen residue is sucked into the transfer pump 5 through the suction pipe 51 in a state where the screen residue is diffused in water.
[0028]
In the treatment tank 2, an overflow portion 26 can be formed at an appropriate position as necessary.
[0029]
The transfer pump 5 disposed outside the processing tank 2 is a non-blocking pump, and its suction pipe 51 is connected to the lower position of the secondary cleaning part 2c of the processing tank 2, thereby being crushed and washed. It is possible to suck the screen residue together with the washing water.
[0030]
A transfer pipe 6 is connected to the discharge side of the transfer pump 5, and this transfer pipe 6 is connected to a screen residue separator 7 that separates the screen residue and washing water.
The transfer pipe 6 is generally a pipe-shaped one.
[0031]
Then, after separating the screen residue and the washing water in the screen residue separator 7, the screen residue is dehydrated by the dehydrator 8 connected to the screen separator 7 until the water content becomes a predetermined moisture content. Store it and take it out on a truck as appropriate.
[0032]
【The invention's effect】
According to this screen residue processing system, the primary cleaning unit, the crushing unit, and the secondary cleaning unit are provided in a single processing tank in a compact manner. Washing can be performed consistently in a small space, and the crushing section is installed in the treatment tank, so it is possible to use running water troughs, and the screen residue is reliably crushed and washed with compact equipment. In addition to the fact that a transfer pump that transports the screen residue after crushing and cleaning to the outside of the processing tank is installed outside the processing tank, maintenance is easy. Can do.
[0033]
In addition, by disposing the water supply nozzles on the upstream side wall and bottom of the primary cleaning unit of the treatment tank, the screen residue can be surely subjected to the primary cleaning with the cleaning water sprayed from the water supply nozzle. The screen residue can be smoothly transferred to the crushing part by preventing the precipitation of the screen residue.
[0034]
In addition, a disc-type crusher configured by arranging a plurality of crushing units each having a plurality of disc-shaped cutters fixed to a rotating shaft so that the disc-shaped cutters of the crushing units overlap with each other is disposed in the crushing section of the processing tank. By installing, the loss head is small, and the amount of water used for the cleaning of the second-stage secondary cleaning unit can be secured.
[0035]
In this case, a disc-type screen constructed by arranging a plurality of screen units each having a plurality of discs fixed to a rotating shaft at the introduction portion of the crushing portion of the processing tank so that the discs of adjacent screen units overlap each other. By arranging and arranging the disc of the screen unit of the disc type screen adjacent to the disc type crusher and the disc-shaped cutter of the crushing unit of the disc type crusher so as to overlap each other, the screen residue can be securely attached to the crusher. While being able to guide and crush, the amount of water used for the washing | cleaning of the 2nd washing | cleaning part of a back | latter stage can be ensured more reliably.
[0036]
In addition, by arranging a stirrer upstream of the suction pipe connecting part of the transfer pump of the secondary cleaning part of the treatment tank, the screen residue can be reliably washed and diffused in the water. As a result, the transfer pump can be prevented from being blocked, and the screen residue after crushing and washing can be smoothly conveyed out of the processing tank.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment of a screen residue processing system according to the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a cross-sectional view of a processing tank.
FIG. 4 is a plan view of the same.
FIG. 5 is a sectional view of a processing tank of a second embodiment of the screen residue processing system of the present invention.
FIG. 6 is a plan view of the same.
7A and 7B show a disk type crusher and a disk type screen, where FIG. 7A is a plan view and FIG. 7B is a front view.
FIG. 8 is a front view of a conventional screen residue processing system.
FIG. 9 is a plan view of the same.
FIG. 10 is an explanatory diagram of a belt conveyor.
FIG. 11 is an explanatory diagram of a screen residue pressure feeding system using a jet pump.
FIG. 12 is an explanatory diagram of a conventional screen residue processing system in which a crusher and a submersible pump are installed in one processing tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flowing trough 2 Processing tank 2a Primary washing part 2b Crushing part 2c Secondary washing part 3 Disc type crusher 3A Disc type screen 4 Stirrer 5 Transfer pump 6 Transfer pipe 7 Screen residue separator 8 Dehydrator 9 Storage hopper

Claims (5)

A treatment tank configured to receive a screen residue recovered from a sewage treatment plant and to crush and wash the screen residue by providing a primary washing unit, a crushing unit, and a secondary washing unit in an integrated tank; A screen residue processing system comprising: a transfer pump disposed outside the processing tank and transporting the screen residue after crushing and cleaning to the outside of the processing tank. 2. The screen residue treatment system according to claim 1, wherein a water supply nozzle is disposed on the side wall and the bottom of the treatment tank in the upstream side of the primary cleaning part. In the crushing part of the treatment tank, a disc type crusher configured by arranging a plurality of crushing units with a plurality of disc-shaped cutters fixed to the rotating shaft so that the disc-shaped cutters of the crushing units overlap each other is arranged. The screen residue processing system according to claim 1 or 2. At the introduction part of the crushing part of the processing tank, a disc type screen is arranged in which a plurality of screen units each having a plurality of discs fixed to a rotating shaft are arranged so that the discs of adjacent screen units overlap each other. The screen residue processing according to claim 3, wherein a disk of a screen unit of a disk type screen adjacent to the disk type crusher and a disk-shaped cutter of a crushing unit of the disk type crusher are arranged so as to overlap each other. system. The screen residue treatment system according to claim 1, 2, 3, or 4, wherein a stirrer is disposed upstream of the suction pipe connection portion of the transfer pump of the secondary cleaning portion of the treatment tank.

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