JPH10216419A - Sewage cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a backwahing type filtration method having possibility of causing trouble to downstream and to lower sewage cleaning cost. SOLUTION: In this device, a sewage inflow tank 10 and a cleaned water outflow tank 12 are made in fluid communication with each other, and the fluid communication part is closed by a plane part 28b of a filter 28 in the shape of a long-length belt consisting of cloth, nonwoven fabric or water insoluble paper. By a level sensor 32, a rise in the level of the sewage in the sewage inflow tank caused by clogging of the plane part, and by a detection signal thereof, a winding motor 30 is driven to wind up the plane part of the filter on a filter winding part 26 and also unwind an unused part 28a of the filter from a filter unwinding part 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage purifying apparatus used for purifying dirty water such as a pond in a golf course, an artificial pond in a shrine or a park.

[0002]

2. Description of the Related Art Water from reservoirs at golf courses, artificial ponds at shrines and parks, etc. is circulated to some extent, but is not replaced for a long period of time. It's easy to do. In addition, the nutrients of these influents dissolve in the water, and eutrophication produces algae such as blue-green algae, which significantly impairs the beauty of the pond.

[0003] As a method for removing pollutants and algae mixed in water, there are a method of removing pollutants and the like by coagulating or decomposing the same using chemicals, and a method of removing pollutants and the like by microorganisms. The most reliable method is to physically remove contaminants and algae by using a filtering material. As a physical removal method using this filter material, a filter material such as silica sand or ceramic is used, and when the filter material becomes dirty due to the adsorption of pollutants or algae, the water is caused to flow backward and is absorbed by the filter material. A backwashing filtration method in which contaminated substances and algae are removed by washing and a filter material is repeatedly used is most widely used.

[0004]

However, the backwashing filtration method involves a high concentration of pollutants and algae if the sewer for draining the backwash water is not fully equipped near the filtration device. The backwash water will flow downstream, which will cause annoyance to the downstream area. On the other hand, in order to prevent the dirt from being pressed against the downstream region, the filter medium adsorbing the pollutants and algae may be disposed of together with the filter medium, but this significantly increases the cost of purifying the sewage.

The present invention has been made in view of the above circumstances, and does not employ a backwashing filtration method that may cause trouble to a downstream region, and can reduce wastewater purification costs by reducing wastewater purification costs. It is intended to provide a purification device.

[0006]

According to the present invention, a sewage inflow tank having a sewage introduction section for introducing sewage and a purified water outflow tank having drainage means for discharging purified water are communicated with each other in a flow path manner. A filter feeding portion in which an unused portion of a long band-shaped filter made of fabric, nonwoven fabric or water-insoluble paper is wound in a roll so as to be able to be fed at a partition between the sewage inflow tank and the purified water outflow tank; A filter take-up section, from which the filter that has been fed out from the feed-out section and used for filtering sewage is wound, and a filter take-up section that is fed out of the filter pay-out section and is not taken up by the filter take-up section. The filter is provided so that the communicating portion between the tank and the purified water outflow tank is closed, and a winding drive means for winding the filter is installed in the filter winding section, and A water level detecting means for detecting a rise in the level of sewage in the sewage inflow tank caused by clogging of a flat portion of the filter before being fed from the filter feeding portion and wound by the filter winding portion; When the rise in the level of the sewage in the sewage inflow tank is detected by the water level detecting means, the winding drive means is driven by the detection signal, and clogging is performed by the winding drive means. The flat portion of the filter is wound around the filter winding portion, and an unused portion of the filter is fed out from the filter feeding portion.

[0007] In the sewage purification apparatus according to the present invention, sewage flows into the sewage inflow tank through a sewage inflow tank from a pond, a shrine, and an artificial pond in a park. Passing through the flat portion of the filter before being fed out from the filter feeding portion provided in the partition portion between the sewage inflow tank and the purified water outflow tank and wound by the filter winding portion,
At this time, pollutants and algae in the sewage are removed by filtration with a filter. The water purified by removing pollutants and algae while passing through the filter flows into the purified water outflow tank through the communication part between the wastewater inflow tank and the purified water outflow tank, and from the purified water outflow tank. It is discharged out of the device by the discharging means. While such a water purification process is being repeatedly performed, the flat portion of the filter that has been unwound from the filter unwinding unit and has not been wound up by the filter winding unit may have a fabric, a nonwoven fabric, or water due to pollutants and algae adsorbed thereon. Insoluble paper causes clogging. If the flat part of the filter is clogged, the flow state of water from the inside of the sewage inflow tank to the inside of the purified water outflow tank deteriorates, and the water level of the sewage in the sewage inflow tank gradually rises. When the water level of the sewage in the sewage inflow tank rises to a predetermined position, the water level detecting means detects an increase in the water level due to clogging of the flat portion of the filter, and the detection driving signal drives the winding driving means. Then, the clogged filter flat portion is wound around the filter winding portion by the winding driving means, and an unused portion of the filter is fed out from the filter feeding portion. When the unused portion of the filter is fed out of the filter feeding section, the sewage in the sewage inflow tank again passes through the flat portion of the filter, passes through the communicating portion between the sewage inflow tank and the purified water outflow tank, and enters the purified water outflow tank. , The water level of the sewage in the sewage inflow tank decreases, the winding drive means stops, and the winding and unwinding operations of the filter stop. In this way, the sewage purification process is continuously performed while the winding and unwinding of the filter are automatically performed at intervals of time.

[0008]

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an embodiment of the present invention, and is a perspective view showing the entire configuration of a sewage purification apparatus with a part thereof broken. This sewage purification device is configured by connecting a sewage inflow tank 10 and a purified water outflow tank 12 in series, and is installed around a pond. A sewage introduction pipe 14 for introducing sewage from a pond is connected to the sewage inflow tank 10.
4 are disposed inside the sewage inflow tank 10.
Further, the purified water outflow tank 12 is connected to a purified water recirculation pipe 16 for discharging purified water and returning it to the pond, and a submersible pump 18 is installed at the inner bottom of the purified water outflow tank 12. One end of the purified water recirculation pipe 16 is connected to the discharge port of the submersible pump 18.

The sewage inflow tank 10 and the purified water outflow tank 12
A communication window 22 is formed in the partition wall 20, and the sewage inflow tank 10 and the purified water outflow tank 12 communicate with each other through the communication window 22 in a flow path manner. I have. On the sewage inflow tank 10 side of the partition wall 20, a filter feeding section 24 and a filter winding section 26 are arranged at a distance. An unused portion 28a of a long strip-shaped filter 28 is wound in a roll shape so as to be able to be fed out in the filter feeding portion 24, and a filter after being used for filtering sewage is provided in the filter winding portion 26. The used portion 28c of is wound up,
The communication window 22 of the partition wall 20 is completely closed by the flat portion 28b of the filter before being fed out from the filter feeding portion 24 and wound up by the filter winding portion 26. The filter 28 is made of a relatively inexpensive filter material such as a fabric, a nonwoven fabric, or a water-insoluble paper.

The filter winding section 26 is provided with a winding motor 30 for winding the used portion 28c of the filter. Further, in the sewage inflow tank 10, the flat portion 28b of the filter is clogged, and the flow state of water from the sewage inflow tank 10 to the purified water outflow tank 12 is deteriorated. When the water level rises, a water level sensor 32 that detects the rise of the water level is provided. When the water level sensor 32 detects a rise in the water level of the sewage, the winding motor 30 is driven by the detection signal to wind up the used portion 28c of the filter, and the water level of the sewage in the sewage inflow tank 10 decreases. When the water level sensor 32 is turned off, the winding motor 30 stops.

The sewage purification processing by the sewage purification apparatus having the above-described configuration is performed as follows. That is, sewage containing pollutants and algae flows from the ponds, the shrines of the golf courses, the artificial ponds of the parks, etc. through the sewage introduction pipe 14 into the sewage inflow tank 10. The sewage that has flowed into the sewage inflow tank 10 passes through a filter flat surface 28 b disposed to close the communication window 22 of the partition wall 20, and at this time, pollutants and algae in the sewage are filtered by the filter 28. The water removed and purified by the action flows into the purified water outflow tank 12 through the communication window 22. The purified water that has flowed into the purified water outflow tank 12 is discharged from the purified water outflow tank 12 through the purified water return pipe 16 by the submersible pump 18 and returned to the pond.

As the sewage purification process is continuously performed, the flat portion 28b of the filter 28 made of cloth, nonwoven fabric or water-insoluble paper is gradually clogged by adsorption of pollutants and algae. Then, the flat portion 28 of the filter
With the clogging of b, the flow state of water from the inside of the sewage inflow tank 10 to the inside of the purified water outflow tank 12 is deteriorated, and the level of the sewage in the sewage inflow tank 10 is normally A. The water level gradually rises. When the level of the sewage in the sewage inflow tank 10 rises and finally reaches the height B, the water level sensor 3
2, the rise in the water level is detected. Water level sensor 32
Detects that the level of the sewage in the sewage inflow tank 10 has reached the height B, the detection signal is sent to the winding motor 3
0, and the winding roller 30 is driven. Then, the flat portion 2 of the clogged filter is moved by the winding motor 30.
8b is wound up by the filter winding section 26, and the unused portion 28a of the filter is fed out from the filter feeding section 24. When the unused portion 28a of the filter is fed out from the filter feeding portion 24 and the clogging of the flat portion 28b of the filter is eliminated, the sewage in the sewage inflow tank 10 passes through the flat portion 28b of the filter again and forms the partition wall 20. Communication window 22
To flow into the purified water outflow tank 12. When the flow state of the water from the sewage inflow tank 10 to the purified water outflow tank 12 is improved, the water level of the sewage in the sewage inflow tank 10 starts to decrease, and the water level sensor 32 is turned off. Water level sensor 32
Is turned off, the winding motor 30 stops, the winding and unwinding operations of the filter 28 stop, and the water level of the sewage drops to near the original height of A. As described above, when the flat portion 28b of the filter is clogged, the used portion 28c of the filter is automatically wound on the filter winding portion 26 and the unused portion 28a of the filter is fed from the filter feeding portion 24. Meanwhile, the purification process of the sewage is continuously performed by the unmanned operation.

In the above embodiment, the water level sensor 32
When the water level sensor 32 is turned off and the water level sensor 32 is turned off, the winding motor 30 stops when the water level sensor 32 is turned off. The winding motor 30 is driven for a certain period of time from the time when the rise of the water level is detected,
The drive and take-up of the filter 28 may be performed by the length of the filter flat portion 28b by one drive of the take-up motor 30.

[0015]

When the sewage treatment apparatus according to the present invention is used, the water does not flow backward due to the repeated use of the filter medium as in the backwashing filtration method. There is no inconvenience, and relatively inexpensive materials such as cloth, nonwoven fabric or water-insoluble paper are used as the filtering material. Therefore, even if the filter is disposable, the cost of purifying the sewage is low. When the clogging of the filter occurs, the clogging of the clogged portion and the feeding of the unused portion are automatically performed by detecting the clogging, so that unattended operation of the device is possible and no labor is required. . Further, the structure of the device is simple, and handling, maintenance and inspection are easy.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention and showing an entire configuration of a sewage purification device in a partially broken state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sewage inflow tank 12 Purified water outflow tank 14 Sewage introduction pipe 16 Purified water return pipe 18 Submersible pump 20 Partition window 22 Communication window 24 Filter feeding part 26 Filter winding part 28 Filter 28a Unused part of filter 28b Flat part of filter 28c Used part of filter 30 Winding motor 32 Water level sensor

Claims (1)

[Claims] 1. A sewage inflow tank having a sewage introduction section for introducing sewage and a purified water outflow tank having drainage means for discharging purified water are fluidly communicated with each other, and the sewage inflow tank and the purified water outflow are connected to each other. A filter feeding portion in which an unused portion of a long band-shaped filter made of cloth, nonwoven fabric or water-insoluble paper is wound into a roll so as to be able to be fed, and a sewage is fed out from the filter feeding portion. The filter take-up portion where the filter after being used for filtration is taken up is separated from the sewage inflow tank and the purified water outflow tank by the flat portion of the filter which is taken out from the filter take-out portion and is not taken up by the filter take-up portion. The communication portion is disposed so as to be closed, and the filter winding portion is provided with winding driving means for winding the filter, and the sewage inflow tank is provided with the filter feeding portion. A water level detecting means for detecting a rise in the water level of the sewage in the sewage inflow tank caused by clogging of the flat portion of the filter before being taken out from the filter and being wound by the filter winding section is installed. When the rise of the water level of the sewage in the sewage inflow tank is detected, the winding drive unit is driven by the detection signal, and the flat portion of the filter clogged by the winding drive unit is wound around the filter winding unit. And an unused portion of the filter is fed out from the filter feeding section.