JPH0221908A - Water cleaning device - Google Patents

Abstract

PURPOSE:To miniaturize the water cleaning device by forming the upper part of a filter tank to a conical shape, circumferentially providing a settling tank to the outer periphery of the conical surface and introducing raw water into the settling tank from the lower part of the tank. CONSTITUTION:The raw water flowing into the lower part of the settling tank 7 from an introducing pipe 9 is subjected to the flocculation and settlement of turbid matter in the settling thank 7, by which the turbidity is removed from the water. The rising flow of the supernatant overflows from the inner peripheral top end wall of the settling tank 7 via a check valve 23 into the filter tank 1. The filtrate obtd. by the filtration is taken out through a filter water pipe 4 from the bottom to the outside. The filtrate of the initial period is removed through a filtrate discharge pipe 5. Cleaning water is supplied from a cleaning water pipe 6 to the bottom of the filter tank 1 at the time of backwashing in the filter tank 1. The size of the water cleaning device is miniaturized in this way and the effective utilization of the device to another application is possible.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a water purification device.

Conventional technology Various structures have been proposed and implemented for water purification devices in the past.
In any of these water purification devices, a sedimentation basin and a filtration basin are connected in a plane through a trough.

Problems to be Solved by the Invention Conventional water purification devices generally consist of a sedimentation basin and a filtration basin connected two-dimensionally via a trough, as described above. This was uneconomical, as it required a large amount of land and also required a wide distribution network.

The present invention was devised in view of the problem of slanting,
The object of the present invention is to provide a water purification device that is compact and extremely economically advantageous by intensively combining a sedimentation tank and a rapid filtration tank.

Means for Solving the Problems The structure of the present invention for achieving the above object will be explained using FIGS. 1 and 2 corresponding to the embodiment. The upper part is formed into a conical surface 2 such as a cone or pyramid that tapers upward, and a sedimentation tank 7 is provided around the outer periphery of the conical surface 2, and raw water is introduced from the bottom of the sedimentation tank 7. The system is characterized in that the supernatant water is allowed to overflow into the filtration tank 1 from the inner peripheral upper end wall of the settling tank 7, and the filtered water is taken out from the bottom of the filtration tank 1.

Function: The water purification device according to the present invention has the upper part of the filtration tank 1 formed into a conical surface 2 such as a cone or pyramid that tapers upward.
Since the sedimentation tank 7 is provided around the outer periphery of the conical surface 2, the filtration tank 1 and the sedimentation tank 7 can be integrated into a three-dimensional structure without restricting their respective functions. , it is possible to realize an extremely compact water purification facility.

Embodiments Below, embodiments of the present invention will be described with reference to the drawings.
The figure shows an example structure suitable for a small-sized water purifier, and FIG. 2 illustrates an example structure suitable for a large-sized water purifier.

In FIG. 1, reference numeral 1 denotes a filter tank that contains crushed stone, sand, or other suitable filter material. It is formed into a conical surface 2 such as a cone or pyramid that tapers upward, and a tubular portion 3 is connected above the conical surface 2. A filtration water pipe 4, a filtration drain pipe 5, and a washing water pipe 6 are connected to the bottom of the filtration tank 1 in branches.

A sedimentation tank 7 is provided around the outer periphery of the conical surface 2 and the annular portion 3 in the upper part of the filtration tank 1, and its planar shape may be circular, square, or any other shape. The sedimentation tank 7 has a pointed bottom 8, a raw water inlet pipe 9 is connected to an arbitrary point near the pointed bottom 8, and a sludge drainage valve 10 is provided at an arbitrary point on the pointed bottom 8. Reference numeral 11 denotes a guide wall installed along the inner circumferential wall 12 of the settling tank 7 with a predetermined gap, and is configured to guide slurry to the pointed bottom 8 of the settling tank 7 during backwashing of the filter tank 1. 13 and 14 are check valves.

In the above configuration, the raw water flowing into the lower part of the settling tank 7 from the raw water introduction pipe 9 is clarified by coagulating and precipitating the turbidity in the settling tank 7, and the rising water flow of the supernatant water is allowed to settle through the check valve 13. The filtrated water that overflows the inner peripheral upper end wall of the tank 7 and flows into the filtration tank 1 and is filtered in the filtration tank 1 is taken out to the outside through the filtration water pipe 4 from the bottom thereof. The filtered water at the initial stage of operation is removed through the filter drain pipe 5.

When backwashing the inside of the filtration tank 1, wash water is supplied to the bottom of the filtration tank 1 from the wash water pipe 6. Here, since the upper part of the filtration tank 1 is formed into a conical surface 2, the upward flow velocity of the backwashing water flow in the filtration tank 1 increases successively, so that the apparent loss of the filtration material such as the sand layer due to the backwashing waterflow increases. The chiller that has passed through the expansion height H does not settle and overflows the upper end of the tubular part 3 with an upward flow, is guided to the guide wall 11 via the check valve 14, and settles along the inner circumferential wall 12 of the settling tank 7. The heavy powder accumulates at the pointed bottom 8 of the sedimentation tank 7, and the slurry can be completely removed from the mud removal valve IO.

FIG. 2 shows an embodiment suitable for a large-sized water purification device, in which the tubular portion 3 of the embodiment suitable for a small-sized water purification device is omitted, and its basic structure (
This is the same as above, and corresponding components are therefore indicated by the same reference numerals as in the above embodiment, and their functions are also the same as above.

Effects of the Invention The present invention is as in the -L era, and the sedimentation tank 7 and the filtration tank 1 are integrated into a unit without restricting the functions of each, so it can be made extremely compact and there is no need for a trough. The facility land area for this type of water purification device can be reduced to about one-third compared to the conventional one, and the water distribution pipe network can be set up within a small area, which is extremely economically advantageous.

Therefore, it is possible to increase the possibility of locating water purification facilities even within the city, and it has excellent effects such as making it possible to effectively use the existing water distribution pipe network for other purposes in the future, especially in the overall urban water supply plan. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. The figure is a longitudinal sectional view showing another embodiment.

Claims (1)

[Claims] A cone tapering upward at the top of the filtration tank 1;
Formed into a conical surface 2 such as a pyramid, a settling tank 7 is provided around the outer periphery of the conical surface 2, raw water is introduced from the lower part of the settling tank 7,
A water purification device characterized in that supernatant water is caused to overflow and flow into the filtration tank 1 from the inner peripheral upper end wall of the settling tank 7, and filtered water is taken out from the bottom of the filtration tank 1.