JPH0585406U - Continuous filtration device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to remove the lumps of suspended fine particles that precipitate at the bottom of the filtration chamber to the outside of the filtration chamber. [Structure] A stirring mechanism that stirs suspended fine particles settled at the bottom in a filtrate chamber 11 of a filter tank 1 in which a rotating filter body 2 is disposed, and in conjunction with it, spontaneously discharges or sucks suspended fine particles of a lump. It is characterized in that a drainage mechanism 4 for removing the liquid is provided outside the filtration chamber 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a continuous filtration device for a suspension that accurately and easily filters a suspension containing suspended fine particles to separate it into a filtrate and suspended fine particles.

[0002]

[Prior Art]

 A large number of filter bodies in which filter pieces and liners are alternately fitted on the rotating shaft are sequentially arranged in the filter tank, and the suspension particles are filtered by the rotation of the filter body and suspended fine particles that precipitate at the bottom of the filter tank. Those equipped with an agitator by means such as injection of pressurized water from an injection nozzle or rotation of a propeller have been disclosed and put to practical use.

However, even if the suspended fine particles that have settled at the bottom of the filtration tank in the apparatus are crushed by a stirrer, they cannot be completely crushed but float as lumps and are pushed up to the rotary filter body. In some cases, this may cause damage to the filter body, which may prevent continuous filtration.

[0004]

[Problems to be solved by the device]

 The mass of suspended fine particles settled at the bottom of the filtration tank is taken out of the filtration tank in that state.

[0005]

[Means for Solving the Problems]

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

[0006]

【Example】

 The drawing 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 liquid supply port 13 is suspended in the upper part of the filtration chamber 11 at the front part (right side in FIG. 1). The fine particle discharge port 15 has a stirrer 3 including a jet nozzle 31 for jetting pressured water toward the rear part and a water supply valve 32 for the fine particle, and a drain port 40 and its drain valve 41 in the jet direction of the jet nozzle 31. Each of the drainage mechanisms 4 is provided 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 linked, and the drainage valve 41 is opened at the same time as 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. It is related that the suction device operates (when the drain valve 41 is opened) or stops in conjunction with opening and closing.

The filter body 2 is composed of a disc-shaped filter piece 21 and a liner 22 having a diameter smaller than that of the filter piece 21 and combined with each other and fitted around a rotary shaft 24. The filter piece 21 is parallel to the central axis. Thus, a plurality of filtrate guide passages 23 (four in the figure) are bored on the same circumference.

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 combined so as to face the liner 22 and arranged in a straight line. Are arranged in the filtration chamber 11 at appropriate intervals and one end of the filtrate guide passage 23 of the filter body 2 is connected to the filtration chamber 12.

Here, the filter body 2 may be arranged in the filtration chamber 11 in combination with the filter body 2 in the vicinity of the outlet 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, 17 is an opening / closing lid for closing the discharge port 12, and 25 is a drive provided at one end of the rotary shaft 24. The gear wheels are shown respectively.

Next, the operation of the device of the present invention will be described. First, the discharge port 15 is closed with the lid 17, the suspension is put in from the liquid supply port 13, and then the whole filter body 2 is rotated in the direction of the arrow in FIG. At this time, the suspension is discharged from the filtration chamber 1 through the filtrate guide passage 23 from the gap between the filter pieces 21, 21 to the filtrate chamber 13 and the filtrate outlet port 14. 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 suspended fine particles and the suspension liquid from the liquid supply port 13 is prevented from flowing out of the discharge port 15 by the suspended fine particle layer, the lid 17 is opened to suspend the suspended fine particle layer. Is advanced by the subsequent suspended fine particle layer and is sequentially discharged from the discharge port 15.

When this operation is continuously performed for a long time, when the suspended fine particles having a large specific gravity settle at the bottom of the filtration chamber 11, the water supply valve 32 of the agitator 3 is opened to release the pressure water from the injection nozzle 31. Is sprayed to stir the precipitate of suspended fine particles, and at the same time, the drainage valve 41 of the drainage mechanism 4 is opened, and the lump of the precipitate is discharged from the drainage port 40 by gravity (the suction device is continuously connected). When tied, it is forcibly sucked) and taken out from the filtration chamber 11. In addition, the outflow amount of the suspension mixed with the aggregate 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 suspended in the filtration tank 1. The liquid is full. It is also 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 supply port 13.

[0014]

[Effect of the device]

 As described above, the filtration device of the present invention is provided with a drainage mechanism at the bottom of the filtration chamber, which works in conjunction with a stirring tool, thereby removing the particles of suspended fine particles that could not be agitated and hindering the filtering action. This has the effect of preventing the damage of the filter body and is essential for the continuous filtration 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 Reference Signs] 1 Filtration tank 2 Filter body 3 Stirrer 4 Drainage mechanism 13 Liquid supply port 14 Filtrate outlet 15 Discharge port 21 Filtrate 22 Liner 23 Filtrate guide path 24 Rotating shaft

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 filter pieces and liners alternately fitted around a rotating shaft, in each filter body. 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 port and a discharge port for suspended particulates and has a stirring tool for the precipitated suspended particulates at the bottom of the filtering tank. A continuous filtration device having a mechanism.