JPS5850125B2 - filtration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filtration device, and more particularly to a sand filtration device that washes contaminated F sand and reuses it cyclically.

The present inventor developed a ``rotary filtration device with multiple filtration chambers that can separate sand'' as a filtration device for purifying polluted water containing solid matter such as livestock excrement, and previously registered a utility model. An application was filed (Utility Application No. 129957/1983).

As a result of further research, the present inventor completed a circulating sand filtration device that washes and reuses the contaminated P sand after separation.

The present invention will be further explained below with reference to drawings showing one embodiment thereof.

1 is a wet cyclone disposed at the top of the apparatus of the present invention, which separates sand and floc-containing water.

A diffusion chute 3 is connected to the lower part of the wet cyclone 1 via a valve 2.

An inclined sheep 4 is installed below the diffusion chute 3,
This dehydrates the sand that contains water.

Below the inclined sheave 4, a washed sand storage tank 5 with a vibrating discharger 6 attached to a part of the lower hopper is installed, and washed P sand is stored in this washed sand storage tank 5.

A water sprinkling pipe 7 is installed below the washed sand storage tank 5 and communicates with a coagulation tank 9 via a valve 8, thereby sprinkling polluted water onto the washed sand of a filter 10 installed below. be.

The specific structure of the filter 10 does not matter as long as it is a sand filter that can separate P sand, but for example, the roll 110
Side wall plates 12 are attached to both ends, and the space formed by the roll 11 and the side wall plates 12 is partitioned radially with respect to the roll axis by an appropriate number of partition plates 13 to form a plurality of filtration chambers, and each filtration chamber is further divided into upper and lower stages. A mesh body 14 attached to the lower chamber forms three compartments, and a P liquid discharge port 15 is formed on the side wall plate of the lower compartment, and a middle compartment is filled with a lubricant 16, and is located directly above the roll 11. /r4 Sand layer 17 in the upper chamber of the overchamber
It is preferred to use a rotary filter formed by a filter.

Below the filter 10 (C is a dirty sand receiving tank 18 for receiving P sand contaminated by filtration), a part of the lower hopper of this tank 18 is equipped with a vibrating discharger 19 similar to the washed sand storage tank 5. is attached.

20 is a water collector that temporarily collects the F liquid discharged from the discharge port 15, and is attached to the dirt storage tank 18 by a support 21. This water collector 20 is further equipped with a guide pipe. 22 are connected in series, and the F liquid is guided to a predetermined location.

A sand washing tank 23 is installed below the sludge receiving tank 18, and inside the sand washing tank 23, a submersible pump 24 connected to the wet cyclone 1 located at the top of the apparatus of the present invention via a lift pipe 25 is installed. It's been done.

This submersible pump 24 is used not only to lift the mixture of P sand, flocs and water to the wet cyclone 1, but also to separate the flocs adhering to the F sand, so a pump that generates a vortex is used.

Examples of submersible pumps that generate vortex flow include those equipped with Francis blades, diagonal flow blades, axial flow blades, oven blades, etc. at the bottom.

Similarly, the sand washing tank 23 has a taper of 1/'C45° or more on the tank wall so that the sand is concentrated in the center, and a clean water inflow pipe 26 and a waste water discharge pipe 27 are attached to the upper part of the tank wall. There is.

Further, 28 is a discharge pipe for discharging the floc-containing water separated by the wet cyclone 1, and in this embodiment, it is connected to the sand washing tank 23, but it is not necessarily limited to this.

When connecting the drain pipe 28 to the sand washing tank 23, it is necessary to cut the drain pipe once at an appropriate position to adjust the pressure.

Furthermore, 29 is a guide pipe for water dewatered by the inclined sheep 4fC, which is connected to the drain pipe 28.

Next (C) The operation of the device of the present invention will be explained.

1. First, if the polluted water containing flocs is supplied from the coagulation tank 9 to the sand layer of the filter 10 by opening the valve 8 and spraying it through the water sprinkling pipe 7, filtration is performed, and as time passes, the sand layer gradually becomes flocs, etc. is occluded by

At that time, close the valve 8, stop watering, and remove the filter 10.
is rotated at 1 with the next filtration chamber at the top, new P sand is supplied from the sand storage tank 5 to the filtration chamber to re-form the sand layer, and polluted water is again sprinkled with the watering pipe 7.

In this case, for example, an overflow port 30 is bored in the upper side wall of each filtration chamber of the filter 10, and a water level switch 32 is connected to the overflow pipe 31.
is connected to the built-in box 33, and connects the liquid level switch 32, a timer 34 for controlling the rotation of the filter, and a filter rotation stopper (electromagnetic type) 35.
If this is connected to the valve (electromagnetic type) 8a, and further the filter rotation stopper 35 and the limit switch 36 are connected, and the limit switch 36 and the vibration ejector 6 are connected, these operations can be performed automatically.

That is, as the sand layer 17 is blocked by flocs, the water level rises, and eventually water overflows from the overflow port 30 and begins to flow into the liquid level switch box 33 through the overflow pipe 31.

When the water level in the box reaches a certain level, the switch is activated, the FA rotation timer 34 is started, and watering is stopped at the same time.

During this time, water is drained according to the set time of the timer 34, and after draining, the filter rotation stopper 35 is released and a motor (not shown) is driven to rotate the filter 10.
is rotated.

Next, when the next filtration chamber of the filter 100 reaches the upper part, the limit switch 36 is activated and the 100 rotations of the filter are stopped. At the same time, the stopper 35 is turned on and the vibration ejector 6 of the sand storage tank 5 is activated, and a new Feed a fixed amount of F sand (control the operating time of the vibrating ejector with a timer to supply a fixed amount of sand.

) After that, drain the water in the liquid level switch box 33,
The interlocking of the valve 8a is released, the polluted water is sprinkled again, and the filtration is restarted.

In this case, the opening and closing of the valve 36 of the liquid level switch box is also automatically controlled by a timer or the like.

On the other hand, the contaminated F sand is removed from the hopper 18 by 100 rotations of the filter.
When it reaches a certain amount, it is discharged into the lower sand washing tank 23 by the vibration discharger 19.

The contaminated sand is separated into sand and floc by the rotation of the submersible pump 1240 blades, which generates a vortex and a mixed phase of water and sand, and the sand particles rub against each other and against the tank wall.

However, in order to prevent the submersible pump from clogging, the sand washing tank 23 is first filled with tap water, and after driving the submersible pump first, the sand is dropped into the tank, which is heavy for vehicles.

Next, by operating the submersible pump 24, the sand and floc rise together with water through the lifting pipe 25, and flow into the wet cyclone 1 in the upper part.

Here, the sand and floc-containing water are separated, and only the sand is discharged and dropped from the lower part of the cyclone, through a diffusion chute 3, into an inclined sheave 4.

The floc-containing water passes from the outlet of the cyclone 1 through the drain pipe 28 that has been cut at the optimum position, and returns to the sand washing tank 2.
Return to within 3.

The water dewatered by the inclined sheave 4 is also passed through the guide pipe 2.
The waste water is returned to the sand washing tank 23 via the drain pipe 28 via the sand pipe 9 and is used for circulation.

At this time, sewage equivalent to the amount of clean water flowing in from the clean water inflow pipe 26 at the bottom of the sand washing layer 23 is discharged from the sewage discharge pipe 27 at the top of the tank and returned to the raw water storage tank (not shown).

The sand dewatered by the inclined sheave 4 is then stored in the sand storage tank 5 and reused as F sand.

As described in detail above, according to the P filtration apparatus of the present invention, it is possible to separate the F sand blocked by pollutants, wash it in an extremely difficult time, and then reuse it, thereby achieving efficient F sand.
It is an extremely practical invention that allows the use of sand and allows for fully automatic filtration of polluted water by incorporating a switch system.

[Brief explanation of drawings]

The drawings show one embodiment of the filtration device of the present invention, and FIG. 1 is a schematic front view of the same, and FIG. 2 is an enlarged view of the filter portion thereof. 1... Wet cyclone, 3... Diffusion chute, 4...
... Inclined sieve, 5 ... Washing sand storage tank, 6 ... Vibration discharger, 7 ... Sewage discharge pipe, 9 ... Coagulation tank, 10.
...filter, 16...F agent, 17...sand layer, 18.
... Dirty sand receiving tank, 19 ... Vibration discharger, 23 ... Sand washing tank, 24 ... Submersible pump, 25 ... Lifting pipe, 28 ... Drainage pipe, 29 ... Dehydration guide pipe.

Claims (1)

[Claims] 1 A separator that separates sand and floc-containing water, a dehydrator disposed below this separator and dewatering the water-containing sand separated by the separator, and a dehydrator disposed below this dehydrator,
a washed sand storage tank that stores F sand dehydrated by the dehydrator;
A sewage sprinkling pipe is disposed below the washing sand storage tank of the filtration device and sprinkles polluted water onto the P sand of the filter; It is a rotary filter, in which side wall plates are attached to both ends of the roll, and the space formed by the roll and the side wall plates is partitioned radially with respect to the roll axis by an appropriate number of partition plates to form a plurality of filtration chambers. The three-ward room is made up of a net-like structure with two tiers of rooms, upper and lower.
It was constructed by forming a filtrate outlet on the side wall plate of the lower compartment, filling the middle compartment with F agent, and forming a sand layer in the upper compartment of the filtration chamber located directly above the roll. and a dirty sand receiving tank which is arranged below the rotary filter and receives F sand of the rotating filter contaminated by filtration, A filtration system consisting of a sand washing tank equipped with a submersible pump for washing sludge from the sludge receiving tank, and a lifting pipe connecting the submersible pump of the sand washing tank and the sand-flocc containing water separator. Device.