JPH0222682B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" This invention relates to the improvement of a filter used for filtering water in a garden pond or cooling water in an air conditioner in a building. The purpose is to provide a filter machine that is convenient for installation and handling such as backwashing of materials by using extremely lightweight granular foam stay rolls.

[Prior Art] Conventionally, sand filters and cassette-type filters are well known as filters used for filtering cooling water for garden ponds and air conditioners.

For example, as a sand filter,
For those using cassette type materials, there is Utility Model Publication No. 57-48487.

[Problems to be solved by the invention] However, because the sand used in sand filter machines is heavy, it is difficult to install them in high places such as the roof of a building, and even if they are installed in a low place as a sealed type,
A large amount of washing water is required to wash the material, and the washing power is also large. In addition, the cassette type is difficult to recycle when the material becomes clogged.
They are usually disposable and are uneconomical.

``Means for Solving the Problems'' Therefore, in this invention, an extremely lightweight material made of polystyrene foam or the like is used as the material to facilitate handling, and when cleaning and regenerating the material, a small amount of water is used. In addition to making it possible to regenerate with a small amount of power, by making the tank a closed type, the excess water from the tank installed at a low position can be easily sent to the cooling tower installed on the roof. In addition, the water from a garden pond located far away from the filter can be circulated.The gist of this system is to fill an airtight tank with flotation material and collect the water on the top wall of the airtight tank. In a filter machine equipped with a nozzle and a supply port for the stock solution to be filtered at the bottom and a stirring blade for the material, the supply port for the stock solution is used to double as a drainage pit for cleaning waste water of the flotation material. Branch the drain pipe for cleaning the floating material from the stock solution supply pipe connected to the supply port,
This branched drain pipe 8 and the drain pit form a U-shaped pipe.

``Operation'' When pond water, etc. to be filtered is injected into the closed tank from the bottom of the tank configured as described above, the floating material is pushed up to the top wall in a compacted manner, causing overlayering. form. and,
While the pond water passes through the overlayer, impurities in the pond are removed and the pond water is taken out through the water collection nozzle. In other words, for example, if the overpressure is set to 1 kg/cm ² , excess water can be supplied to a high place of about 7 meters. etc. can be sent to. In this way, when the overlayer becomes clogged, the supply of pond water is stopped and the water in the closed tank is stirred by a stirring blade, thereby loosening the clogged material. The impurities that are stuck inside the wood are separated from the wood. Therefore, by letting the wastewater in the tank flow through the supply hole and into the drain pipe,
Only contaminants can be taken out. At this time, it would be more effective if backwash water is injected from the water collection nozzle, but this backwash water is not necessarily necessary, and the amount of water in the closed tank is sufficient.

``Example'' This invention will be described in more detail with reference to the attached drawings. In FIG. 1, reference numeral 1 is a closed tank which is a tank, 2 is a flotation material, and 3 is installed on the top wall of the closed tank 1. This water collection nozzle 3
As shown in FIG. 2, a portion of which is enlarged, a large number of rings each having a trapezoidal cross section are stacked to form a cylindrical shape.
Reference numeral 4 indicates a stirring blade made of a material provided at the bottom of the closed tank 1, and reference numeral 5 indicates a drainage pit, which also serves as a supply port for the stock solution. A supply pipe 6 for stock solution is connected to the bottom thereof. 7 is its feed pump. (See FIG. 4 A to B) Further, a drain pipe 8 for washed waste water is connected to the bottom of the drain pit 5.

The mechanism configured in this way is, for example, a third
It is used for cooling water in the cooling tower 9 of an air conditioner as shown in the figure.
To explain based on A to D, first, when over-operating, as shown in Figure 4-A, the pump 7
Then, the raw water supplied to the closed tank 1 via the supply pipe 6 and the drain pit 5 pushes up the flotation material 2 and forms an overlayer in the upper part of the closed tank 1. Then, while the supplied stock solution passes through this superlayer, impurities are captured and taken out from the water collection nozzle 3 to the outside of the machine.

In this way, when the overlayer becomes clogged due to continued operation, the supply of the stock solution is stopped and the inside of the tank is stirred by the stirring blade 4, as shown in Fig. 4-B. , the clogged material layer diffuses in the tank as shown in the figure, and the material and impurities are separated. still,
The timing for cleaning this material may be determined by detecting a rise in pressure within the tank 1 or by using a timer after a certain period of time has elapsed, and these operations can of course be performed automatically.

Next, when the stirring is stopped, the impurities separated from the wood settle to the bottom of the tank due to the difference in specific gravity, as shown in FIG. 4-C. Therefore, as shown in FIG. 4-D, by opening the drain valve 8, only the foreign matter can be taken out from the drain pipe 8.

That is, when this turbid water is drained, the flotation material 1 floats in the liquid and is first taken out of the machine from the settled contaminants. By stopping the drainage when the water reaches the bottom of the tank, it is possible to prevent the material from flowing out. As an automatic stop means for this drainage, in the example shown,
The pit 5 provided at the bottom of the drain pipe 8 and the drain pipe 8 form a U-shaped pipe. If the amount of water in the sealed tank 1 as described above is not sufficient for cleaning, the material can be cleaned by stirring the clogged material layer and then draining the turbid water while supplying cleaning water from the water collection nozzle. can be thoroughly washed. In this case,
By maintaining the liquid level in the sealed tank 1 high, it is possible to prevent the material from flowing away, but by raising the upper opening of the drain pipe 8 forming the U-shaped pipe, automatic It is possible to prevent material from being washed away. In addition to the amount of water in the sealed tank 1, by injecting cleaning water from the water collection nozzle 3,
The water collection nozzle is backwashed, allowing for more effective regeneration of the wastewater.

``Effects of the Invention'' As detailed above, the permeator according to the present invention uses extremely lightweight materials and a pressurized sealed tank, so compared to conventional ones that use sand as the material, It can be easily installed in any desired location such as a garden or building without any restrictions on the installation location.In particular, when the material becomes clogged, it can be regenerated without using a conventional sand filter. This type of conventional permeable material requires only a small amount of water and power, and is economical because the overlayer can be easily regenerated compared to those using conventional cassette type materials. This method has solved all of the problems.

[Brief explanation of drawings]

FIG. 1 is a side view of a superstructure according to the present invention, partially cut away. Fig. 2 is an enlarged vertical cross-sectional side view of a part of the water collecting nozzle, Fig. 3 is a drawing of a cooling water overflow sheet of a cooling tower using a filter according to the present invention, and Fig. 4- FIGS. 4A to 4B are longitudinal sectional side views showing the operating state of the overmachine according to the present invention, respectively. Explanation of symbols, 1... Sealed tank, 2... Floating material, 3... Water collection nozzle, 4... Stirring blade, 5... Drain pit, 6... Supply pipe, 8... Drain pipe.

Claims (1)

[Claims] 1. A floating material 2 is filled in a sealed tank 1, a water collection nozzle 3 is provided on the top wall of the sealed tank 1, and a supply port 5 for the undiluted solution to be filtered and a water collection nozzle 3 are provided at the bottom of the tank 1. In the filter machine equipped with two stirring blades 4, the stock solution supply port 5 doubles as a drainage pit for cleaning waste water of the flotation material 2, and a stock solution supply pipe 6 connected to this supply port 5 is used. , a superfloating machine using a flotation material in which a drain pipe 8 for cleaning waste water of the flotation material 2 is branched, and this branched drain pipe 8 and the drainage pit 5 form a U-shaped pipe. 2. A filter machine using a flotation material according to claims 1 and 2, wherein the height of the branched drain pipe 8 is made substantially equal to the height of the supply port 5 for the stock solution. 3. An overflow machine using a flotation material according to claim 1, wherein the top wall has one water collection nozzle 3, which is detachable from the top wall.