JP2709998B2 - Multi-stage filtration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a multi-stage filtration apparatus in which a set of a stock solution tank and a filtrate tank placed thereunder are stacked in a plurality of stages. This type of filtration device is mainly used in the chemical industry, food industry and the like to separate solids in a liquid.

[0002]

2. Description of the Related Art Conventionally, in this filtration device, a stock solution tank and a filtrate tank which are stacked in a plurality of stages are connected to each other by a slide plate having a long hole, and a series of these tanks are raised. For this purpose, the uppermost tank was connected to a cylinder device or the like. When replacing the filter paper provided between the stock solution tank and the filtrate tank, each tank was lifted to open between the tanks, and the work was performed by the gap.

FIG. 5 shows a single stage in a conventional double-stage filtration apparatus, wherein 1 is a stock solution tank, 2 is a filtrate tank, and 3 is a filter medium belt provided around the filtrate tank. The filter medium belt is hung on rollers 4, 5, and one of the rollers 4 is a driving roller. Filter paper 6
Is supported on the filter medium belt 3 and is pressed between the stock tank 1 and the filtrate tank 2 together with the filter medium belt, and is filtered by passing the liquid introduced from the stock tank, and the filtered liquid is filtered from the filtrate tank. Be taken out. Therefore, the filter medium belt 3 is also a seal material.

When the filter paper 6 is set, the filter paper 6 is fed to the filter medium belt 3 by a paper feeder with the undiluted solution tank 1 and the filtrate tank 2 open.
The upper part is sent to a position where it covers the filtrate tank 2 and cut by a cutter. This operation is performed for each stage. When the setting of the filter paper is completed, each tank is pressed by a cylinder device, etc., and the space between the stock solution tank and the filtrate tank in each stage is sealed.
Then, the undiluted solution is introduced and filtration is performed. The filtrate of each stage accumulates in the filtrate tank and flows out therefrom to another tank or the like. The filter medium was replaced by draining all the filtrate, lifting each tank, driving the filter medium belt 3 by driving the roller 4, and peeling off the filter paper thereon with a scraper.

[0005]

In the conventional structure, the setting and replacement of the filter paper are performed through the filter medium belt 3. Therefore, when a liquid having a high viscosity is filtered, the filter paper adheres to the filter medium belt, and the separation becomes difficult. Further, the filter medium belt adhered to the filtrate tank 2, and the movement of the filter medium belt deteriorated. Further, in this type of filtration device, since the pressing of the laminated tanks is performed with a force of several tons, traces of the sealing gasket remain on the filter medium belt 3 and the stop position of the filter medium belt is not fixed. Since such traces are generated at positions shifted from the previous traces, there is a problem in that liquid leaks from a portion where the traces are in contact, and sealability is reduced.

[0006] An object of the present invention is to solve the above-mentioned problems of the prior art. Therefore, it is an object of the present invention to allow a filter paper to be discharged smoothly in a multi-stage filter, and another object is to provide a filter. To improve the controllability.

[0007]

A feature of the multistage filtration device according to the present invention is that in a filtration device in which a set of a stock solution tank and a filtrate tank are stacked in a plurality of stages, a linear drive is performed along one side of the filtrate tank 2. Guide rails 8 are provided along the other side of the device 7 and facing it, with their linear drives and guide rails.
A clamp 11 is attached to a connecting member 9 provided over the filter, and the filter paper 6 held by the clamp is moved by the linear driving device via the connecting member. Further filter media 14 for supporting the filter paper is fixed on the filtrate tank.

[0008]

Function One end of the linear drive device 7 provided in the filtrate tank, A
With the connecting member 9 at the position, the filter paper is fed to the position of the connecting member by the paper feeding device, and is held by the clamp 11. Next, the connecting member is stopped at a substantially intermediate position B beyond the filtrate tank by the operation of the linear drive device, the filter paper is cut by the cutter, and the filter paper is set on the filter medium on the filtrate tank. After the filtration is completed, the connecting member is moved to the other end and the position C together with the filter paper by the operation of the linear drive device, the clamp is released, and the filter paper is discharged.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The double-stage filtration apparatus according to the present invention is also configured such that a set of a stock solution tank and a filtrate tank is stacked in a plurality of stages, and the tanks in each stage are pressed by a cylinder device or the like and lifted when the filter paper is replaced. The stock solution is filtered at each stage by passing through a filter paper provided between the stock solution tank and the filtrate tank.

FIGS. 1 to 3 show an embodiment of the present invention. As shown, a linear drive unit such as an air cylinder 7 is provided along one side of a filtrate tank 2 in this filtration apparatus. A guide rail 8 is provided and installed on the other side of the filtrate tank facing the same. These air cylinders 7
The guide rails 8 are parallel to each other, and are respectively arranged near the filtrate tank 2.

A connecting member 9 is provided at right angles to the air cylinder 7 and the guide rail 8, and one end of the connecting member is fixed to a movable portion of the air cylinder 7 and the other end of the connecting member is shown in FIG. As shown in FIG. 2, it is configured to be movable along a guide rail 8 via a slider 10. Therefore, the connecting member 9 is operated by the air cylinder 7 and linearly reciprocates beyond the filtrate tank 2 in the same posture. The connecting member 9 is preferably formed of a flat plate, but may be formed of another member such as a rod.

As shown in FIGS. 1 and 2, the connecting member 9 is provided with clamps 11 for holding the filter paper 6, and in the illustrated example, a pair of clamps 11 are provided at both ends of the connecting member. However, in some cases, one wide clamp may be used. FIG. 4 shows an example of such a clamp, in which a pair of clamp members 12 which can be moved up and down one another to grip or release the leading edge of the filter paper.
And these clamp members are driven by the air cylinder 13.

Further, this filter device is provided with a filter medium 14 serving to support the filter paper 6, and the filter medium is fixed to the upper surface of the filtrate tank 2 by a fixing bracket, for example, a fixing screw 15 as shown in FIG. You. Therefore, the conventional filter medium belt is not used. Therefore, when each tank is pressed, a gasket 16 such as a metal gasket below the stock solution tank 1 pressurizes the filter medium 14 with the filter paper 6 placed on the filter medium 14, and the gasket is applied to the filter medium. The contact position is constant.

When the filter paper 6 is set at a predetermined position, the connection member 9 is supplied with one end of the air cylinder 7 or the guide rail 8, that is, as shown in FIG. The filter paper is supplied to the position of the clamp 11 of the connecting member 9 by the paper feeding device in a state where the filter paper is placed at the position A closest to the paper device, and the driving device 13 of each clamp is operated to grip the filter paper. Next, the air cylinder 7 is operated to transfer the connecting member 9 and the filter paper 6 from the position A to the position B where the connecting member 9 is located in the middle of the guide rail 8 beyond the filtrate tank 2. At this time, the end of the connecting member 9 opposite to the air cylinder 7 is guided by the guide rail 8. The filter paper is then cut by a cutter to the length used for filtration. This operation is performed in each stage.

[0015] Filtration is carried out by pressing the tanks of each stage as in the prior art. When the filtration is completed, each tank is lifted to open between the undiluted liquid tank and the filtrate tank, and the filter paper 6 used for the filtration is moved to the other end C of the guide rail 8 together with the connecting member 9 by the air cylinder 7. Then, the clamp 11 is released and the filter paper is discharged. Next, the connecting member 9 is connected by the air cylinder 7.
Is returned to the initial A position, and the next cycle is started.

In the above embodiment, an air cylinder is used as the linear drive device. However, another mechanism or device may be used, such as a ball screw or a rack drive.
A pinion or the like may be used.

[0017]

As described above, according to the present invention, the filtered filter paper is peeled off from the filter medium on the filtrate tank by being moved while being clamped by the clamp, so that it can be easily peeled. In addition, since the paper discharge device and the filter medium are separated, the filter paper can be easily discharged without any problem such as the filter medium belt adhering to the filtrate tank. Further, when pressed, the gasket presses the filter medium, but since the contact position is constant, there is no gap due to a shift in the contact position, and the seal is suitably sealed and no liquid leakage occurs. In addition, the replacement of the filter medium is easy because it is performed only by attaching and detaching the fixing bracket.

[Brief description of the drawings]

FIG. 1 is a plan view showing a part of a multistage filtration device according to an example of the present invention.

FIG. 2 is a cross-sectional view taken along line DD of FIG.

FIG. 3 is a sectional view showing a single-stage seal portion of the filtration device.

FIG. 4 is an elevation view of an example of a clamp used in the apparatus of the present invention.

FIG. 5 is a side view showing a single stage of a conventional similar filtering device.

[Explanation of symbols]

 2 Filtrate tank 6 Filter paper 7 Linear drive 8 Guide rail 9 Connecting member 11 Clamp 14 Filter media

Claims (2)

(57) [Claims] 1. A multi-stage filtration device, wherein a set of a stock solution tank and a filtrate tank is laminated in a plurality of stages and is filtered by a filter paper disposed between the stock solution tank and the filtrate tank in each stage. A linear drive provided along one side of the filtrate tank, a guide rail provided along the other side of the filtrate tank facing the one side, the linear drive and the guide rail A multi-stage filtration device comprising: a connection member provided across the device and moved by the linear drive device; and a clamp attached to the connection member and gripping the filter paper. 2. A multi-stage filtration apparatus according to claim 1, multi-stage filtration apparatus filter medium for supporting the filter paper is characterized in that it is fixed on the filtrate tank.