JPS5849767Y2 - "Filtration" device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a filtration device for filtering and purifying tap water and other water for use.

Conventionally, upflow filtration devices require a blower for air cleaning and a pump for water cleaning to clean the filtration tank, and as the filtration area increases, larger capacity blowers and pumps are required, and accompanying problems arise. This increased the area of the pump room, which was a problem in terms of equipment and energy saving measures.

The purpose of the present invention is to eliminate these conventional drawbacks and provide a device that can omit the pump dedicated to cleaning water by adding a cleaning water tank, reduce equipment costs, and simplify operation. It is.

The present invention provides a washing water tank equipped with a constant water level control mechanism at a higher location than a filtration tank equipped with a filter layer, and a raw water inflow distribution tank located at a higher location, and connects the inflow distribution tank and the filtration tank with a valve. The inflow distribution tank and the washing water tank are communicated through a pipe with a valve, and the washing water tank and the filtration tank are communicated with each other through a washing water introduction pipe with a valve. It is something to do.

To explain one embodiment of the present invention with reference to the drawings, the filter medium layer 2
The inflow distribution tank 3 connected to the filtration tank 1 is divided into an inflow section 6 and a distribution rack 7 by a partition wall 5 having a fixed or movable weir 4.

A cleaning water tank 8 equipped with a constant water level control mechanism 9, such as a float valve or an electrical or mechanical controller, to maintain a constant water level.
is arranged higher than the filtration tank 1, and the inflow distribution tank 3 is arranged higher than the washing water tank 8.

The distribution conduit 7 of the inflow distribution tank 3 and the lower part of the filter medium layer 2 of the filtration tank 1 are communicated by an inflow pipe 11 having a valve 10, and the inflow section 6 of the inflow distribution tank 3 and the washing water tank 8 are connected to each other under constant water level control. The washing water tank 8 and the lower part of the filter layer 2 of the filtration tank 1 are connected to each other by a pipe 13 having a valve 12 connected to the mechanism 9, and the washing water tank 8 and the lower part of the filter medium layer 2 of the filtration tank 1 are connected to each other by a washing water inlet pipe having a valve and having a different diameter, that is, a large pipe having a valve 14. A large-diameter wash water inlet pipe 15 and a small-diameter wash water inlet pipe 15' having a valve 14' communicate with each other.

Further, the inflow distribution tank 3 is equipped with a pump (not shown) for raising raw water.

In the figure, 16 is an air supply pipe having a valve 17.

A trough 18 is provided in the filtration tank 1 while maintaining a head difference with the washing water tank 8.

19 is a treated water outflow part.

During filtration, raw water enters the inflow section 6 of the inflow distribution tank 3, overflows the weir 4, flows from the distribution culvert 7 through the inflow pipe 11, and flows upward through the filter layer 2 of the filtration tank 1. The suspended solids are captured by the filter layer 2 and become treated water, which is discharged from the 1-rough 18 to the outside of the system.

In this case, valve 10 is open and valves 12, 14, 14', 17 are closed.

On the other hand, when performing cleaning, first, the inflow valve 10 is closed, the valves 12, 14' and 17 are opened, air is introduced from the air supply pipe 16, and cleaning water is introduced by gravity from the cleaning water introduction pipe 15'. The filter medium layer 2 is washed with air and water (low flow rate), and then the valves 17 and 14' are closed, the valve 14 is opened, and washing water is introduced under natural flow from the washing water introduction pipe 15 to wash with water (large flow rate). Do the following.

Filtration can then begin by closing valve 14 and opening valve 10.

In this embodiment, the above-mentioned filtration tank 1 has been explained using an example of an upflow type filtration tank having an inflow part at the bottom and an outflow part at the top, but it can also be applied to a gravity type filtration tank. Although two valves are shown, one can be installed if a flow rate control valve is attached.

Furthermore, a float valve may be used to maintain a constant water level in the washing water tank 8, and a plurality of filtration tanks and a distribution channel may be communicated.As described above, according to the present invention, an inflow distribution tank is installed. By using the system as a pump for raising raw water to the inflow distribution tank, a dedicated pump for cleaning water can be omitted, reducing space and maintenance and safety efforts. Cleaning is performed by natural flow, which simplifies operation. There is an advantage that one inflow distribution tank can be applied to a plurality of filtration tanks, and moreover, the equipment area can be greatly reduced, and filtration can be performed at an economical cost.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1...filtration tank, 2...filtration layer, 3...
...Inflow distribution tank, 6...Inflow section, 7...
...Distribution culvert, 8...Washing tank, 9...
・Constant water level control mechanism, 11...Inflow pipe, 13...
...Piping, 15°15'...Washing water introduction pipe.

Claims (1)

[Scope of utility model registration request] 1. A washing water tank equipped with a constant water level control mechanism is provided at a higher location than a filtration tank equipped with a filter layer, and a raw water inflow distribution tank is arranged at a higher location, and the inflow distribution tank and the filtration tank are connected to an inflow pipe with a valve. The inflow distribution tank and the washing water tank are communicated with each other through a pipe with a valve, and the washing water tank and the filtration tank are communicated with each other through a wash water introduction pipe with a valve. 2. The inflow distribution tank is divided into an inflow part and a distribution rack by a partition wall equipped with a weir, the distribution channel communicating with a filtration tank, and the inflow part communicating with a washing water tank. A filtration device according to claim 1, which is a utility model. 3. The washing water introduction pipe is made up of two pipes with different pipe diameters, and each pipe communicates the washing water tank and the filtration tank.Claim 1 of the claims for registration of a utility model. Or the filtration device according to item 2. 4. The utility model registration claim according to claim 1, 2 or 3, wherein the filtration tank is a plurality of tanks, each of which is in communication with the inflow distribution tank. Filtration device. 5. Utility model registration claim 1, wherein the filtration tank is an upflow type filtration tank with an inflow part at the bottom and an outflow part at the top;
The filtration device according to item 2, 3, or 4. 6. The filtration device according to claim 1, 2, 3, or 4, wherein the filtration tank is a gravity filtration tank.