JP2631582B2 - Horizontal filter plate type 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 a horizontal filter plate type filter in which a filter medium such as filter paper is horizontally held between a stock plate and a filtrate plate below the plate.

[0002]

2. Description of the Related Art Conventionally, this type of filtration device has been suitably used for filtering relatively expensive liquids such as resin liquids or liquids which are difficult to filter, and filter paper can be used as a filter medium. It has features that can be performed automatically.

[0003] This filtration device is constructed in a single-stage (single-plate type) or a multi-stage type. In each case, as shown in FIG. A filtrate plate 2 to be placed, a filter medium 3 horizontally held between the stock plate and the filtrate plate, a pipe 4 for introducing a stock solution to be filtered is connected to the stock plate 1, and the filtrate plate 2 is connected to the filtrate plate 2. Is a pipe 5 for taking out the filtered liquid (filtrate).
Is connected.

The pipe 5 is usually connected to a tank 6 for temporarily storing a filtrate. Reference numeral 7 denotes a tank for receiving the undiluted solution, and the undiluted solution in this tank is introduced into the undiluted solution plate 1 by a pump 8 via a pipe 9 and a pipe 4 connected to the discharge side. A valve 10 is installed in the pipe 9. Reference numeral 11 denotes a pipe for sending gas for removing the filter medium into the stock solution plate 1, and a valve 12
Is provided. In addition, a cylinder 13 is provided in the filtration device, and the cylinder plays a role of pressing the stock solution plate 1 with the filter medium 3 interposed between the filtrate solution plate 2 and lifting the stock solution plate 1 when the filter medium is replaced.

[0005] The stock solution to be filtered is introduced into the stock solution plate 1,
The filtrate is filtered by passing through a filter medium 3 set therein, and the filtrate flows down to the filtrate plate 2, is taken out by the pipe 5, and flows into the filtrate tank 6. The filter medium 3 is placed on a conveyor having a liquid-permeable flat conveying surface, and when the filtration capacity decreases with the passage of the filtration time, gas is introduced into the stock plate to facilitate the separation of the filter medium from the stock plate. The stock plate 1 is lifted by the cylinder 13 and is replaced with a new filter medium by the operation of the conveyor.

[0006]

When the stock solution to be filtered is not sticky or weak, the cylinder 1 must be replaced when the filter medium is replaced.
When the stock solution 1 is lifted by the operation of 3, the filter medium 3 peels off from the lower end surface of the stock solution plate, and can be moved together with the conveyor without any problem, and can be replaced. However, when the stock solution is a viscous solution, the stock solution plate 1 is lifted. However, the filter media remains attached without being completely peeled off, and therefore cannot be moved by the conveyor, which hinders the replacement of the filter media. There was a point.

An object of the present invention is to solve the above-mentioned problems of the prior art. Therefore, even when a stock solution such as a viscous liquid which is difficult to peel is handled, the filter medium is appropriately peeled from the stock solution plate, and An object of the present invention is to provide a horizontal filter plate type filter device which enables automatic replacement.

[0008]

A horizontal filter plate type filtration apparatus according to the present invention is configured to horizontally sandwich a filter medium between a stock plate and a filtrate plate thereunder, and to remove the filter medium from the stock plate. A pair of annular packings 17 are fixed to the lower end surface of the stock solution plate at an interval to facilitate peeling, and a communication hole 18 is formed in the stock solution plate to feed a pressurized gas into the space 20 between the packings. It is characterized by being.

[0009]

In this filter device, gas is introduced into the stock solution plate when the filter material is replaced, but a pair of packings are further interposed between the lower end surface of the stock solution plate and the filter material. The pressurized gas is sent into the space 20 of the above, so that the gas pressure separates the filter medium from the lower end face of the stock solution plate, and the filter medium is peeled off.

[0010]

1 and 2 show an embodiment of the present invention. As shown in the drawing, this filtration device is basically the same as the conventional one, and has a stock plate 1 and a filtrate disposed thereunder. FIG. 1 exemplifies a two-stage type plate comprising a plate 2 and a filter medium 3 sandwiched between the plates. The filtrate plate 2 is connected to a pipe 5 for removing the filtrate. 2, a filtrate tank 6, a stock solution tank 7, a pump 8, and a connection pipe 9 between the pump and the pipe 4 are provided. Further valve 1
Pipe 1 for sending gas for removing the filter medium into the stock solution plate 1 through
1. Tightening cylinder 13 and the like are installed. In the drawing, 14 is a conveyor for transporting the filter medium, 15 is a shoe for removing the filter medium in relation to the conveyor, and 16 is a conveyor motor.
It is.

As shown in FIG. 2, a horizontal filter plate type filtration device according to the present invention has a pair of annular packings 17 fixed to the lower end surface of the stock plate 1 in contact with the upper surface of the filter medium 3 at intervals. In addition, a communication hole 18 is formed in the stock solution plate so that the pressurized gas is introduced into the space between the pair of packings.

As is clear from FIG. 1, the stock plate 1 is usually square in outer shape, has a square annular shape with a certain width at the lower end face, and has a filtrate plate 2 corresponding thereto. Is similarly formed in a square annular shape.
Further, a pair of packings 17 are also arranged and fixed in a square annular shape along the lower end surface of the stock solution plate, so that one packing is on the inner peripheral side and the other packing is on the outer peripheral side, and the interval between them is appropriate. The interval may be as small as several centimeters, for example, but is preferably the same on each side of the ring.

The pair of packings 17 are preferably made of the same material and have the same cross-sectional shape. The cross-sectional shape may be arbitrary. However, in the case of a square cross-section as shown in FIG. It has a cross-sectional shape with dimensions of about 6 to 12 mm. These packings are usually made of a material such as Teflon, polypropylene, vinyl chloride, etc., and are respectively fitted in grooves formed along the lower end surface of the stock solution plate 1 and fixed with an adhesive or the like. There is also.

The pressurized gas is injected into a space 20 between the pair of packings 17, specifically, an annular space between the lower end surface of the stock solution plate 1 and the upper surface of the filtrate plate 2 and surrounded by the pair of packings 17. Although a single communication hole 18 may be provided, a plurality of communication holes 18 are preferably provided as shown in FIG. 2, and the role of separating the filter medium from the lower end surface of the stock solution plate by the pressure of the supplied gas. To fulfill. Air is usually used as the pressurized gas, and in one example, a pressure of about 1.9 atm is used. The communication hole 18 is connected via a pipe 19 to a pressure gas source (not shown), that is, a compressor or a pressure gas tank. The pressure gas source may be common to the gas introduced into the stock solution plate 1 via the pipe 4.

In many cases, filter paper is used as the filter medium 3, and a Teflon coating belt conveyor having a liquid-permeable conveying surface is used as the conveyor 14 in one example. The filter medium is placed on such a conveyor, so that the filter medium is clamped between the stock plate 1 and the filtrate plate 2 together with the conveyor surface, and when the filter medium is replaced, it is moved by the conveyor 14 and is provided at the folded position. Transferred by port 15.

At the time of filtration, the filter medium 3 is sandwiched between the lower end surface of the stock solution plate 1 and the upper surface of the stock solution plate 2 via a pair of packings 17. 1, is filtered by passing through a filter medium 3, and is discharged from a filtrate plate 2 through a pipe 5 to a filtrate tank 6.

When the filtration capacity decreases with the passage of the filtration time, the pump 8 is stopped and the introduction of the undiluted solution is stopped by operating the valve, and the gas is introduced into the undiluted solution plate 1 through the gas pipe 11. Then, the packing 1 is passed through the communication hole 18 by the pipe 19.
The pressurized gas is fed into the space 20 between the spaces 7. The gas introduced between the packings acts between the lower end face of the stock plate and the filter medium without leaking, so that the filter medium 3 is separated from the lower end face by gas pressure,
Peel off. The separated filter medium is taken out by the conveyor 14. A new filter medium set on the conveyor again is set at the filtration position, and the next filtration operation is performed.

[0018]

According to the present invention, therefore, according to the present invention, when the filter medium is replaced, gas pressure acts between the packing between the lower end face of the stock plate and the filter medium, and the filter medium is separated from the lower face of the stock plate by the pressure. Can be appropriately separated from the undiluted solution plate. Therefore, the filter medium can be automatically replaced without any trouble, and especially when the viscous liquid is filtered, the filter medium can be automatically replaced, thereby greatly improving workability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a horizontal filter plate type filtration device according to the present invention.

FIG. 2 is a cross-sectional view showing a main part of the filtration device according to the present invention.

FIG. 3 is a cross-sectional view partially showing a conventional horizontal filter plate type filtration device of the same type.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Undiluted plate 2 Filtrate plate 3 Filter material 17 Packing 18 Communication hole

Claims (1)

(57) [Claims] 1. A stock solution plate, a filtrate plate disposed therebelow, and a filter medium horizontally and interchangeably sandwiched therebetween.
In a horizontal filter plate type filtration device in which the stock solution introduced into the stock plate is filtered by the filter medium and taken out of the filtrate plate, a pair of annular packings are fixed at a lower end surface of the stock plate at intervals. A horizontal filter plate-type filtration device, further comprising a communication hole formed between the pair of packings for supplying pressurized gas to the stock solution plate.