JPH072010Y2 - Continuous filtration device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a continuous filtration device for a suspension, in which a suspension containing suspended fine particles is accurately and easily filtered to separate into a filtrate and suspended fine particles. .

[0002]

2. Description of the Related Art A large number of filter bodies in which filter pieces and liners are alternately fitted on a rotating shaft are sequentially arranged in a filter tank, and the suspension is filtered by rotating the filter bodies and at the bottom of the filter tank. A suspension equipped with a stirring tool by means of spraying pressurized water from a spray nozzle or rotating a propeller has been disclosed and put to practical use.

However, even if the suspended fine particles settled at the bottom of the filter tank in the apparatus are crushed by an agitator, they may not be completely crushed and may float as a lump and be pushed up by the rotary filter body. However, this may cause damage to the filter body, which sometimes causes a situation in which continuous filtration cannot be performed.

[0004]

The problem is to take out the lump of suspended fine particles settled at the bottom of the filtration tank to the outside of the filtration tank in that state.

[0005]

Therefore, a drainage mechanism is provided for taking out the lump of suspended fine particles settled at the bottom of the filtration tank to the outside of the filtration tank in that state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows one embodiment of the device of the present invention, which will be described in detail. The device of the present invention comprises a filter tank 1 and a filter body 2.

The filtration tank 1 is divided into a filtration chamber 11 and a filtrate chamber 12, and a suspension supply port 13 is provided at an upper portion of the filtration chamber 11.
At the front (right side in FIG. 1) of the suspended fine particles.
The agitating device 3 including a jet nozzle 31 and a water supply valve 32 for jetting pressure water toward the rear portion to the bottom, and a drainage mechanism 4 including a drainage port 40 and a drainage valve 41 in the jetting direction of the jet nozzle 31. And the filtrate outlet 12 is provided in the filtrate chamber 12. Further, the water supply valve 32 of the agitator 3 and the drainage valve 41 of the drainage mechanism 4 are interlocked with each other, and the drainage valve 41 is opened at the same time when the water supply valve 32 is opened or after a while. Here, a suction device (not shown) such as a pump may be connected to the drain valve 32 via the drain pipe 42 to forcefully drain the liquid. The suction device operates in conjunction with opening and closing (drainage valve 41
(When open) or stop.

The filter body 2 comprises a rotating shaft 2 formed by alternately combining disc-shaped filter pieces 21 and liners 22 having a diameter smaller than that of the filter pieces 21.
The filter piece 21 has a plurality of filtrate guide passages 23 (four in the figure) formed on the same circumference in parallel with the central axis.

A large number (five in the figure) of the filter bodies 2 are arranged adjacent to each other, and the filter pieces 21 of the adjacent filter bodies 2 are liner 22.
And are arranged in a straight line so as to be opposed to each other, and are arranged in the filtration chamber 11 at appropriate intervals in the vertical direction and the filter body 2
One end of the filtrate guide passage 23 is connected to the filtrate chamber 12.

The filter body 2 may be arranged in the filtration chamber 11 in combination with the filter body 2 in the vicinity of the discharge port 15 in FIG.

In the figure, reference numeral 16 is a sealing member provided near the forefront filter body 2 and the vicinity of the discharge port 15, and 17 is the discharge port 12.
The opening / closing lid for closing and the driving gear 25 provided at one end of the rotary shaft 24.

Next, the operation of the device of the present invention will be described. First,
After closing the discharge port 15 with a lid 17 and inserting the suspension from the liquid supply port 13, the whole filter body 2 is rotated in the arrow direction in FIG. At this time, the suspension flows from the filtrate chamber 13 through the filtrate guide path 23 through the gap between the filter pieces 21 to the filtrate outlet port 14.
And is discharged to the outside of the filtration tank 1. On the other hand, the suspended fine particles are stacked on the outer circumference of the filter piece 21 and are transferred toward the discharge port 15 by the rotation thereof. When the discharge port 15 is filled with the suspended fine particles, and the suspension from the liquid supply port 13 is blocked by the suspended fine particle layer from flowing out from the discharge port 15, the lid 17 is opened to form the suspended fine particle layer. The particles are advanced by the subsequent suspended fine particle layer and sequentially discharged from the discharge port 15.

When this operation is continuously performed for a long time, when the suspended particulates having a large specific gravity are deposited on the bottom of the filtration chamber 11, the water supply valve 32 of the agitator 3 is opened to supply the pressure water from the injection nozzle 31. The precipitate of the suspended fine particles is jetted to stir, and the drain valve 41 of the drain mechanism 4 is opened at the same time, and the lump of the precipitate is naturally discharged from the drain port 40 by gravity (a suction device is connected. In this case, suction is forcibly performed and the product is taken out from the filtration chamber 11. In addition, the outflow amount of the suspension mixed with the lump of the precipitate from the drainage mechanism 4 is smaller than the supply amount of the suspension from the supply port 13, and the suspension is always in the filtration tank 1. Is full. Further, it is possible to completely stir the suspension discharged from the drainage mechanism 4 in a separate step and supply it again to the filtration chamber 11 from the liquid supply port 13.

[0014]

As described above, the filtering device of the present invention is provided with a drainage mechanism interlocking with a stirring tool at the bottom of the filtering chamber to remove agglomerates of suspended fine particles that cannot be stirred. In addition, it has the effect of hindering the filtering action and preventing damage to the filter body, and is essential for the continuous filtering action.

[Brief description of drawings]

FIG. 1 is a front sectional view of the device of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

[Explanation of sign]

 DESCRIPTION OF SYMBOLS 1 Filter tank 2 Filter body 3 Stirrer 4 Draining mechanism 13 Liquid supply port 14 Filtrate outlet 15 Discharge port 21 Filtrate 22 Liner 23 Filtrate guide path 24 Rotation axis

Claims (1)

[Scope of utility model registration request] 1. A suspension outlet and a filtrate outlet connected to a filtrate guide passage having a plurality of filter bodies each of which has a filter piece and a liner alternately fitted around a rotating shaft. A drainage device interlocked with the operation of a stirring tool in a filtering device that is sequentially arranged in a filtration tank equipped with a mouth and a discharge port for suspended fine particles and has a stirring tool for the precipitated suspended particles at the bottom of the filtration tank. A continuous filtration device having a mechanism.