JP2001219197A - Excretion residue removing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent such a phenomenon that the receiving port of a hopper is clogged with excretion residue and excretion residue becomes impossible to discharge from the excretion residue discharge port of a dehydrator. SOLUTION: Washing water C is ejected to the receiving port of the hopper 5 from a hopper washing nozzle 10 to wash off the excretion residue hooked with the receiving port of the hopper 5. The screw 6b the dehydrator 6 is intermittently rotated to avoid such a state that the excretion residue S accumulated on this side of the excretion residue discharge port 6c of the dehydrator is repeatedly shorn by the rotation of the screw to become pasty. By this constitution, when an inflow period of raw water W containing a large amount of excretion residue is continued, it can be prevented that the excretion residue S is bridged over the receiving port of the hopper to clog the receiving port. When the inflow period of raw water 41 almost containing no excretion residue is continued, it can be prevented that the excretion residue S' can not be discharged from the excretion residue discharge port 6c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing sewage, and more particularly, to preventing sewage from being clogged in a receptacle of a hopper and preventing sewage from being discharged from a sewage outlet of a dehydrator. The present invention relates to a residue removing device.

[0002]

2. Description of the Related Art FIG. 3 is a schematic structural view showing a conventionally known residue removing apparatus. FIG. 4 is a schematic sectional view of the drum screen. The sewage removing apparatus 500 includes a raw water introduction pipe 1 that introduces inflow raw water W containing garbage (garbage such as vegetable waste, feces lump, paper waste, etc.) and drops the inflow trough 1a into the inside of the drum screen 2; A drum screen 2 in which wires are arranged in a cylindrical direction, the drum screen 2 being rotated by a drum motor 2a in a direction opposite to the falling direction of the inflow raw water W to separate filtered water F into residue S, and an outer peripheral surface of the drum screen 2 A washing nozzle 3 for spraying washing water C, a filtered water tank 4 for receiving the filtered water F dropped from the drum screen 2, and a drainage guide 2 b of the drum screen 2, which is discharged from the inside of the drum screen 2. A hopper 5 for receiving the falling residue S, and a screw 6b for rotating the falling residue S from the hopper 5 by a dehydrating motor 6a A dehydrator 6 which presses against a small-diameter residue discharge port 6c against gravity and dewaters by pressing, a dewatering drain receiver 7 for receiving dewatered water from the residue S, and discharge from the residue discharge port 6c The apparatus includes a waste receiving basket 8 for storing the dewatered residue S 'that has been dropped and dropped, and a control device 50 for controlling the rotation of the drum motor 2a and the dehydrating motor 6a.

[0003]

The amount of the residue contained in the inflowing raw water W is not constant and varies with time. That is,
If there is a period during which the inflow raw water W containing a large amount of residue is flowing,
There is also a period during which the inflow raw water W containing almost no residue remains.

[0004] If the inflow raw water W containing a large amount of scum continues to flow, in the above-described conventional scum removal device 500, a large amount of scum continues to drop from the drum screen 2 to the receiving port of the hopper 5, so that the hopper There was a problem that a bridge may be caused at the receiving port of No. 5 and clogged.

On the other hand, when the period of inflow of the inflowing raw water W containing almost no residue continues, in the above-described conventional residue removing apparatus 500, the previously introduced residue S should be pushed out by rotating the screw 6b. Since the subsequent residue S is not supplied,
The previously introduced residue S stays in front of the residue discharge port 6c, and is repeatedly sheared by the rotation of the screw 6b to form a paste, which serves as a lubricant, and thereafter, new residue S is supplied. However, there is a problem that the scum cannot be discharged from the sewage discharge port 6c because the sewage is not able to proceed against gravity due to slippage.

Accordingly, a first object of the present invention is to provide an apparatus for removing residue, which can prevent residue from being clogged in a receptacle of a hopper. A second object of the present invention is to
An object of the present invention is to provide a residue removing device which can prevent residue from being unable to be discharged from a residue discharge port of a dehydrator.

[0007]

According to a first aspect of the present invention, there is provided a drum screen for separating influent raw water containing sewage into filtered water and separating the sewage, and a sewage discharged from the drum screen and falling. A residue removing device comprising: a receiving hopper; and a dehydrator that pushes the residue that has fallen from the hopper to a residue discharge port with a screw against the gravity and dewaters by pressing the residue. And a hopper cleaning nozzle for injecting water. In the sewage removing apparatus according to the first aspect, since water is jetted from the hopper cleaning nozzle to the hopper, the scum trapped in the receiving port of the hopper is immediately washed away and no bridging occurs. Therefore, even if the inflow raw water containing a large amount of scum continues to flow, the scum does not clog the receptacle of the hopper. In addition, since the residue remaining in the dehydrator is washed with the water injected into the hopper, the residue can be dewatered and the residue can be cleaned.

According to a second aspect, the present invention provides the residue removing apparatus according to the first aspect, further comprising control means for intermittently performing the water injection. provide. In the residue removal device according to the second aspect,
Since the injection of water from the hopper cleaning nozzle to the receiving port of the hopper is performed intermittently, cleaning water can be saved.

In a third aspect, the present invention relates to a drum screen for separating inflow raw water containing sewage as filtered water into sewage, a hopper for receiving the sewage discharged from the drum screen and falling, and a hopper for the hopper. And a dewatering device that presses against the gravitational force with a screw toward a residue discharge port and dewaters by squeezing the residue, and a control means for intermittently rotating the screw. And a residue removing device. In the residue removal device according to the third aspect, since the screw of the dehydrator is intermittently rotated, even if the residue remains in front of the residue discharge port, the time for receiving the shear by the rotation of the screw is reduced, and the paste-like state is reduced. Therefore, slippage does not occur when a new residue is supplied, and the residue can be suitably discharged from the residue discharge port.

[0010] In a fourth aspect, the present invention provides a drum screen for separating inflow raw water containing sewage as filtered water into sewage, a hopper for receiving sewage discharged from the drum screen and falling, and a hopper for the hopper. And a dewatering machine that presses against the gravity with a screw to drain the debris that has fallen from the hopper and dewaters by pressing the debris, and a hopper cleaning nozzle that injects water into the hopper. And a control means for intermittently injecting the water and intermittently rotating the screw are provided. In the residue removing apparatus according to the fourth aspect, since water is jetted from the hopper cleaning nozzle to the receiving port of the hopper, the residue caught in the receiving port of the hopper is immediately dropped and no bridge occurs. Therefore, even if the inflow raw water containing a large amount of scum continues to flow, the scum does not clog the receptacle of the hopper. Since the water is intermittently injected from the hopper cleaning nozzle to the receiving port of the hopper, cleaning water can be saved. Furthermore, since the screw of the dehydrator is intermittently rotated, even if the residue remains in front of the residue discharge port, the time of shearing by the rotation of the screw is reduced, and it becomes difficult to form a paste. Does not slip when supplied, and the residue can be suitably discharged from the residue discharge port. In addition, since the residue remaining in the dehydrator is washed with the water injected into the hopper, the residue can be dewatered and the residue can be cleaned.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited by this. FIG. 1 is a schematic sectional view showing a residue removing device according to one embodiment of the present invention. The sewage removal apparatus 100 introduces the inflow raw water W containing the sewage and removes the inflow trough 1.
a into a drum screen 2 and a drum in which a wedge wire is arranged in a cylindrical direction, and is rotated by a drum motor 2a in a direction opposite to the falling direction of the inflowing raw water W to form filtered water F and residue. A drum screen 2 that separates S from the drum screen 2, a drum cleaning nozzle 3 that injects cleaning water C to the outer peripheral surface of the drum screen 2, a filtered water tank 4 that receives filtered water F dropped from the drum screen 2, A hopper 5 for receiving the residue S discharged from the inside of the drum screen 2 and dropped by the residue discharge guide 2b of the screen 2;
A dewatering machine 6 that pushes the residue S that has fallen from the bottom by a screw 6b that is rotated by a dehydration motor 6a to a small diameter discharge port 6c against gravity and dewaters by pressing the same;
Dehydration drain receiver 7 for receiving dehydrated water from the residue S
The washing water C is sprayed toward the sludge receiving basket 8 containing the dewatered sludge S ′ discharged from the sludge discharging port 6 c and dropped, and the inclined surface of the receiving opening of the hopper 5, and washed. A hopper cleaning nozzle 10 and a hopper cleaning valve 10a for injecting a part of the water C into the dehydrator 6, a control for controlling rotation of the drum motor 2a and the dehydration motor 6a, and opening and closing of the hopper cleaning valve 10a. And an apparatus 20.

FIGS. 2A and 2B show the control device 20.
FIG. 4 is an exemplary diagram of a time chart illustrating opening / closing control of the hopper cleaning valve 10a and rotation control of the spin-drying motor 6a according to the first embodiment. In FIG. 2A, the hopper cleaning valve 10a alternately repeats, for example, a "closed" state for 10 minutes and an "open" state for 30 seconds. In addition, the dehydration motor 6a alternately repeats, for example, a "pause" state for 10 minutes and an "operation" state for 30 seconds. Here, the hopper cleaning valve 10a is first set to the "open" state, and the residue S is flushed from the hopper 5 with the cleaning water to a position where it is caught by the screw 6b of the dehydrator 6. Next, after the washing water contained in the residue S flows out to the dewatering drain receiver 7, it is preferable to “drive” the dehydrating motor 6 a, that is, to operate the dehydrator 6. In FIG. 2B, the hopper cleaning valve 10a alternately repeats, for example, a "closed" state for 3 minutes and an "open" state for 30 seconds. In addition, the dehydration motor 6a alternately repeats, for example, a "pause" state for 10 minutes and an "operation" state for 30 seconds. Here, the dehydrator 6
The residue S staying inside the hopper 5 is repeatedly washed with the washing water jetted to the hopper 5, and then dehydrated, so that the discharged residue S ′ can be made cleaner. In addition, the introduction of the inflow raw water W and the drum motor 2
The rotation of a is performed continuously. Further, the ejection of the washing water C from the drum washing nozzle 3 may be continuous or intermittent. When the injection of the cleaning water C from the drum cleaning nozzle 3 is intermittent, an independent valve for that purpose may be provided, or the hopper cleaning valve 10a may be shared.

(Example) Inflow raw water W is domestic wastewater that has passed through a sedimentation basin and a coarse screen in the first stage.
0 mg / l and turbid component 200 mg / l. The residue S discharged from the drum screen 2 is composed of kitchen waste 9
8%, hair 0.4%, paper 1.5%, plastics 0.4%
1% and the water content was 92-95%. The hopper cleaning valve 10a alternately repeats a "closed" state for 10 minutes and an "open" state for 30 seconds, and slightly deviates the timing from the "closed" state. The "run" state for a second was alternately repeated. Slag residue S ′ discharged from the residue discharge port 6c of the dehydrator 6
Had a moisture content of 75 to 85%. After operating continuously for three months, the residue S did not clog the receptacle of the hopper 5. Further, there was no possibility that the residue S ′ could not be discharged from the residue discharge port 6 c of the dehydrator 6.

[0014]

According to the residue removing device of the present invention, it is possible to prevent the residue from being clogged in the receiving port of the hopper when the inflowing raw water containing a large amount of residue continues. Further, it is possible to prevent the residue from being unable to be discharged from the residue discharge port of the dehydrator when the inflow raw water containing almost no residue remains.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a residue removing device according to an embodiment of the present invention.

FIG. 2 is a time chart showing opening / closing control of a hopper cleaning valve and rotation control of a dewatering motor in the residue removing apparatus according to one embodiment of the present invention.

FIG. 3 is a schematic configuration diagram showing an example of a conventional residue removing apparatus.

FIG. 4 is a schematic sectional view of a drum screen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Raw water introduction pipe 1a Inflow trough 2 Drum screen 2a Drum motor 2b Drain discharge guide 3 Drum washing nozzle 4 Filtration water tank 5 Hopper 6 Dehydrator 6a Dehydration motor 6b Screw 6c Drain discharge outlet 7 Dehydration drain receiver 8 Drain receiver basket 10 Hopper cleaning nozzle 10a Hopper cleaning valve 20 Control device 100 Scum removal device C Wash water F Filtration water S Scum (before dehydration) S 'Scum (after dehydration W Inflow raw water

Continuing from the front page (72) Inventor Sumiichi Sona 5-48-16 Sakuragaoka, Setagaya-ku, Tokyo Waterworks Kiko Co., Ltd. (72) Inventor Yasumasa Kondo 5-48-16, Sakuraoka, Setagaya-ku, Tokyo Waterworks Kiko Stock Company F term (reference) 4D026 BA03 BB01 BC24 BC26 BC30 BF06 BF19 BF20 BF22 4D059 AA01 AA07 BE26 BK17 CB17 EB20

Claims (4)

[Claims] 1. A drum screen for separating inflow raw water containing sewage as filtered water into a sewage, a hopper receiving the sewage discharged from the drum screen and falling, and a sewage falling from the hopper. And a dewatering device for dewatering by pressing against a gravitational force with a screw toward a residue discharge port and dewatering by pressing, wherein a hopper washing nozzle for spraying water to the hopper is provided. Waste residue removal device. 2. The residue removing device according to claim 1, further comprising control means for intermittently injecting the water. 3. A drum screen that separates inflow raw water containing sewage as filtered water into sewage, a hopper that receives the sewage discharged from the drum screen and falls, and a sewage that drops from the hopper. And a dewatering device that depresses against the gravity by a screw toward a residue discharge port and dehydrates by squeezing the residue, wherein a control means for intermittently rotating the screw is provided. Waste residue removal device. 4. A drum screen which separates inflow raw water containing sewage as filtered water into sewage, a hopper which receives the sewage discharged from the drum screen and falls, and a sewage which falls from the hopper. A dewatering device that includes a dewatering machine that presses against a gravitational force by a screw toward a residue discharge port and dewaters the hopper by squeezing the hopper, and a hopper cleaning nozzle that sprays water to the hopper; And a control means for intermittently rotating the screw.