JPH0741129B2 - 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 filtration device in which a cylindrical filter medium is closed in a bag shape and then a stock solution is supplied into the filter medium for compression filtration.

[0002]

2. Description of the Related Art Heretofore, various types of filters have been proposed as this type of filter. For example, after closing the lower end opening of the tubular filter medium, supply the undiluted solution from the upper end opening, press the filter plate horizontally to press the filter medium to press and filter the cake in the filter medium, after the filtration, There is one configured to open the lower end opening of the filter medium and discharge the cake in the filter medium.

[0003]

However, with the structure described above, when the stock solution is generally supplied to the filter medium, the stock solution is likely to be accumulated in the lower part of the filter medium, and the stock solution is less likely to be accumulated in the upper part of the filter medium as compared with the lower part. When filtering, by simply moving the pressing plate horizontally to press and filter the cake in the filter medium, the water content of the cake in the filter medium differs between the upper and lower parts, and a cake with a uniform water content can be produced. There was a problem that I could not.

Therefore, an object of the present invention is to solve the above problems, and to provide a filtration device capable of producing a cake having a more uniform water content.

[0005]

In order to achieve the above object, the present invention provides a substantially uniform water content in the filter medium by adopting a structure in which the pressing member can be inclined and pressed against the filter medium. Produce a cake having.

That is, a tubular filter medium, a support frame for suspending and supporting the tubular filter medium, a support frame provided on the support frame, and
A first opening for closing the lower end opening of the filter medium by opening the lower end opening after closing the lower end opening of the filter medium while filtering the lower end opening of the filter medium to form a bag shape A closing member, a second closing member which is provided in the support frame and closes the upper end of the filter medium, and the stock solution which is stored and the upper and lower end openings are closed by the first and second closing members. A pressing member that presses the filter medium to perform squeeze filtration, a pressing member support member that supports the pressing member in a swingable manner with respect to the support frame, and that is movable in a direction toward and away from the filter medium, Equipped on the support frame,
And a pressing member driving member that is pivotally connected to and connected to the upper and lower sides of a portion of the pressing member that is swingably supported by the pressing member supporting member, and that moves the pressing member in a direction toward and away from the filter medium. , Are provided.

Further, in the above structure, the pressing member supporting member is composed of rails provided on the supporting frame and rollers arranged on both side surfaces of the pressing member and moving on the rails. You can also do it.

Further, in the above structure, the pressing member driving member may be configured such that the tip of the piston rod is fixed to the support frame and the cylinder case moves with respect to the support frame.

Further, in the above construction, the first closing member and the second closing member fix the filter medium opening closing pressing plate to the tip of each piston rod, and between the pressing plate and the support frame. It is also possible to sandwich the opening of the filter medium and close it.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
It will be described in detail based on.

As shown in FIGS. 1 and 2, the filter device according to the present embodiment suspends and supports a square tubular filter medium 1 on a support frame 2 in a stretched state via a suspension member (not shown). A first closing cylinder 3 whose lower end opening is a first closing member
After being closed by driving, the stock solution is supplied into the filter medium 1 through the upper end opening of the filter medium 1, and the upper end opening of the filter medium 1 is closed by driving the second closing cylinder 5 as the second closing member. The pressing plate 4 as a pressing member drives the upper and lower pressing cylinders 6 and 7 to press the filter medium 1 containing the undiluted solution to perform squeeze filtration, while the first closing cylinder 3 causes the lower end of the filter medium 1 after the filtration is completed. The closing operation of the portion was released, the lower end portion was opened, and the cake in the filter medium 1 was generally discharged below the filter medium.

The filter medium 1 is generally made of a cloth made of polypropylene fiber and has a rectangular cylindrical shape. The material of the fibers constituting the filter medium, the thickness of the fibers, the roughness of the mesh and the like are appropriately selected according to the properties of the stock solution to be filtered. Therefore, the material of the fiber may be cotton or the like other than synthetic resin. Further, after reinforcing a synthetic resin sheet with a cloth as a backing, a large number of pores can be opened in the sheet, and the sheet can be used in the same manner as the cloth. The size of the pores can be formed to a desired size depending on the properties of the stock solution. The filter medium 1 is detachably supported on the support frame 2 via a vibration imparting spring or a cylinder.

Filtering devices are arranged on the support frame 2 on the left and right sides in FIGS. 1 and 2, respectively. In other words, two filtration devices are arranged so that one support frame 2 is also used. In each of the filtering devices, the second closing cylinder 5 and the upper pressing cylinder 6 are arranged on the upper side of the support frame 2 along the horizontal direction, respectively, and the lower pressing cylinder 7 and the first closing cylinder 3 are provided at the lower part of the support frame 2. Place each along the horizontal direction. At the central portion of the support frame 2 in each filter device, the vertical pressing cylinders 6 and 7 are sandwiched on both sides of the support frame 2,
The rails 8 are arranged respectively.

The first closing cylinder 3 has a piston rod 3a, and a push plate 3b having a circular cross section at the tip thereof.
2 is fixed, and the concave portion 2 formed in the lower end portion of the fixing plate 2c fixed to the end surface of the support frame 2 on the filter medium side in FIG.
Both ends of the push plate 3b are fitted into the inside of a.
Therefore, the lower end portion of the filter medium 1 is sandwiched between the pressing plate 3b and the fixed plate 2c, and both ends of the pressing plate 3b are fitted into the recesses 2a. I am trying to close it.

The second closing cylinder 5 has a piston rod 5a having a push plate 5b formed in a circular shape in a longitudinal section at a tip thereof.
Is fixed, and the fixed plate 2c of the support frame 2 in FIG.
Both ends of the push plate 5b are fitted in the recess 2b formed at the upper end of the. Therefore, the filter medium 1 is attached to the pressing plate 5b.
The upper end of the filter medium 1 is sandwiched between the fixed plate 2c and the fixed plate 2c, and both ends of the pressing plate 5b are fitted into the recesses 2b to close the upper end of the filter medium 1.

Rollers 16, 1 are provided on both sides of the pressing plate 4.
6 are arranged, the rollers 16 and 16 roll on the rails 8 and 8, and the pressing plate 4 is moved by the driving of the pressing cylinders 6 and 7 in the contacting / separating direction with respect to the filter medium, that is, along the horizontal direction.

The upper and lower pressing cylinders 6 and 7 fix the tip ends of their piston rods 6a and 7a to the filter medium side of the support frame 2, and the cylinder cases 6b and 7b have arms 6c, 6c, 7c, respectively on their both side surfaces. Fix 7c. The tips of these arms 6c, 6c, 7c, 7c are pivotally attached to the upper part and the lower part of the pressing plate 4, in other words, vertically so as to sandwich the roller 16, via pins 14, 14, 15, 15 respectively. Connect to plate 4. The arms 6c, 6c, 7
The cylinders 10 and 10 are provided with the rollers 10 and 10 on the cylinder case mounting portions via the pins 11 and 11, and the rollers 10 and 10 are also provided on the side surface of the cylinder case. Further, rails 9 and 9 are fixed to the outer side of the cylinder cases 6b and 7b of the pressing cylinders 6 and 7 along the horizontal direction of the support frame 2 so that the rollers 10 on both sides of the cylinder cases 6b and 7b, respectively.
10 rolls on the rail 9. The pressing cylinders 6 and 7 are configured to be driven separately. Therefore, since the piston rods 6a, 7a are fixed to the support frame 2 by the driving of the pressing cylinders 6, 7, the cylinder cases 6b, 7b with respect to the support frame 2, the rails 9, 9 on the rollers 10 ,. 10 moves, arm 6
The pressing plate 4 moves so as to come into contact with and separate from the filter medium 1 via c, 6c, 7c and 7c. Therefore, the pressing plate 4 is the filter medium 1
When moving toward, the filter medium 1 is sandwiched between the pressing plate 4 and the fixed plate 2c of the support frame 2 to press the filter medium 1, and the cake in the filter medium 1 is pressed to the pressing plate 4, the support frame 2, and the fixed plate 2c. Squeeze between and to squeeze and filter.

On the other hand, although not specifically shown, a filtrate receiving member and a cake collecting member are provided in the space below the supporting frame 2 so as to collect the filtrate or cake discharged from the filter medium 4. preferable.

According to the above structure, as shown in FIGS. 1 and 2, the first closing cylinder 3 is driven to drive the filter medium 1 while the filter medium 1 is suspended and supported in the support frame 2 by a spring or the like in the shape of a rectangular tube.
Close the lower end opening of the.

Then, the undiluted solution is supplied into the bag-shaped filter medium 1 with the lower end closed by an undiluted solution supply pipe through the upper end opening of the filter medium 1 for filtration. As this stock solution,
For example, there are various liquids such as a liquid containing a solid content of about 0.1 to 2%, and a liquid containing a solid content of several% or more suitable for performing filtration with a filtering device. The filtrate dropped from the filter medium 1 at the time of supplying the stock solution is received by the filtrate receiving member or the like and is recovered by a filtrate recovering member or the like not shown.

Then, as shown in FIGS. 3 and 4, the second
The closing cylinder 5 is driven to close the upper end opening of the filter medium 1.

Next, the vertical pressing cylinders 6 and 7 are driven to move the pressing plate 4 from the solid line position I to the alternate long and short dash line position II in FIG. 4, and the pressing plate 4 and the fixing plate 2 of the support frame 2 are moved.
The filter medium 1 is gradually pressed between c and c to squeeze the cake in the filter medium 1. At this time, the pressing plate 4 has the rollers 16 and 1 on both sides.
When 6 rolls on the rails 8 and 8, it moves in the direction of coming into contact with the filter medium 1. In this case, generally, the stock solution is more likely to collect in the lower part than in the upper part of the filter medium 1 due to its own weight, and the lower part of the pressing plate 4 first comes into contact with the lower part of the filter medium 1 which is swollen by the stock solution to start pressing. At this time, since the pressing cylinders 6 and 7 are driven separately, the lower pressing cylinder 7 receives a resistance force to press the stock solution in the lower portion of the filter medium 1, but the upper pressing cylinder 6 contacts the filter medium 1. The upper part of the pressing plate 4 moves to the filter medium side with respect to the lower part,
It inclines as shown by the dashed-dotted line II in FIG. When tilted in this way, the upper part of the pressing plate 4 contacts the filter medium 1 as well as the lower part to start pressing filtration. Finally, the pressing plate 4 drives and moves the pressing cylinders 6 and 7 to the position shown by the chain double-dashed line III in FIG. 4, and press-filters the stock solution in the filter medium 1.

After the squeeze filtration is completed, the pressing cylinders 6 and 7 are driven in reverse to release the squeezing of the filter medium 1 by the pressing plate 4. Further, the first and second closing cylinders 3 and 5 are driven in reverse to open the upper and lower end openings of the filter medium 1 (see FIGS. 1 and 2),
The cake in the filter medium 1 is dropped below the filter medium by its own weight, and the cake collecting member collects the dropped cake.

Next, when the cake is collected, the first closing cylinder 3 is driven to close the lower end opening of the filter medium 1 again in preparation for the next filtration.

According to the above embodiment, the pressing plate 4 is suspended and supported by the rails 8 and 8 by the rollers 16 and 16 on both sides of the pressing plate 4, and the cylinder case 6 of the pressing cylinders 6 and 7.
By connecting the tips of the arms 6c and 7c connected to b and 7b to the pressing plate 4 via the pivot pins 14 and 15,
By driving the pressing cylinders 6 and 7, the pressing plate 4 can be swung around the rollers 16 and 16, and the pressing plate 4 can be tilted according to the shape of the filter medium 1 containing the stock solution. Therefore, even when the cake is accumulated in the lower part of the filter medium 1 than in the upper part thereof, the press plate 4 is inclined according to the shape of the filter medium 1 and the undiluted solution in the filter medium 1 can be pressed to perform squeeze filtration. A cake having a small thickness in the upper part of the filter and a cake having a large thickness in the lower part of the filter medium can be produced as cakes having substantially the same water content. In addition, the filter chamber constituted by the above-mentioned tubular filter medium 1 has an entire effective filtration area around the entire circumference of the filter chamber as compared with a filter chamber formed between a pair of filter cloths arranged between adjacent filter plates. In addition, since the shape of the filter chamber can be freely changed, there is a large degree of freedom, and there are various effects such as easy rocking of the filter medium as a whole, and easy peeling of the cake from the filter medium. It is possible to significantly improve the filtration efficiency as compared with the above-mentioned filtration device. Also,
The filter medium 1 can be formed into a bag shape by simply sandwiching the lower end portion of the filter medium 1 between the push plate 3b and the fixed plate 2c of the first closing cylinder 3, while the reverse drive of the cylinder 3 causes the lower end portion of the filter medium 1 to move. When the pinch is released, the opening of the lower end of the filter medium 1 is forcibly opened by the weight of the cake, and the cake is discharged. Therefore, the opening / closing structure of the lower end of the filter medium 1 is very simple. Become. In addition, the filter medium 1 having the above-mentioned square tube shape
The filter chamber constituted by the filter chamber has an entire effective filtration area in its entire circumference as compared with the filter chamber formed between a pair of filter cloths arranged between the adjacent filter plates. Since the shape can be freely changed, it has a large degree of freedom, and has various effects such as easy swinging of the filter medium as a whole, and the cake is easily separated from the filter medium 1. Compared with the filter plate type filter device, The filtration efficiency can be greatly improved.

The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example,
The filter medium 1 is not limited to a rectangular cylinder, and may be any polygonal shape such as a triangular cylinder or a pentagonal cylinder. Further, the first and second closing cylinders 3 and 5 and the pressing cylinders 6 and 7 may be air cylinders or hydraulic cylinders, and the same operation can be performed by other known driving means. Also,
The pressing action of the pressing cylinders 6 and 7 on the filter medium 1 is as follows.
The filter medium 1 is not limited to be pressed from one direction, and the filter medium 1 may be pressed from two directions.

[0027]

According to the structure of the present invention, the pressing member is hung and supported on the pressing member supporting member and is swingable around the hanging supporting portion, and the pressing member driving member is pivotally attached to the pressing member. By this, the pressing member driving member drives the pressing member to swing freely around the suspension supporting portion by the pressing member supporting member, and the pressing member rotates around the suspending supporting portion according to the shape of the filter medium containing the stock solution. It is possible to tilt to. Therefore, even when the cake is accumulated in the lower portion than the upper portion in the filter medium, the pressing solution can be pressed according to the shape of the filter medium while pressing the undiluted solution in the filter medium to perform squeeze filtration. It is possible to produce a cake having a large water content and a cake having a large thickness below the filter medium.

[Brief description of drawings]

FIG. 1 is a plan view of a filter device according to an embodiment of the present invention in a state where a filter medium is not closed.

FIG. 2 is a side view of the filter device according to the above-described embodiment of the present invention in a state where the filter medium is not closed.

FIG. 3 is a plan view of the filter device according to the embodiment of the present invention in a state where the filter medium is closed.

FIG. 4 is a side view of the filtering device according to the above-described embodiment of the present invention in a state where the filtering medium is closed.

[Explanation of symbols]

1 Filter Material, 2 Support Frame, 3 First Closing Cylinder, 3b
Push plate, 4 push plate, 5 second closing cylinder, 5b push plate,
6,7 pressing cylinder, 8,9 rail, 10 roller, 11 pin, 12 rail, 13 roller, 14,
15 pins, 16 rollers.

Claims (4)

[Claims] 1. A tubular filter medium (1) and the tubular filter medium (1).
A support frame (2) for suspending and supporting the filter material (1), and a bottom end opening of the filter material (1) closed to form the filter material (1) into a bag shape, and after filtration , Closing the lower end opening of the filter medium (1) to open the lower end,
A first closing member (3) for discharging the cake in the filter medium
A second closing member (5) provided on the support frame (2) and closing the upper end of the filter medium (1), and the stock solution contained in the first and second closing members (3). ，
5) A pressing member (4) for pressing and filtering the filter medium (1) whose upper and lower end openings are closed, and swinging the pressing member (4) with respect to the support frame (2). A pressing member supporting member (8, 16) which is suspended and supported on the filtering member (1) and is movable in the contacting and separating direction with respect to the filter medium (1); and the supporting frame (2), and in the pressing member (4), A pressing member supporting member (8, 16) is pivotally connected to the upper and lower sides of a portion which is swingably supported by the pressing member supporting member (8, 16), respectively, and moves the pressing member (4) in a direction toward and away from the filter medium (1). And a member driving member (6, 7). 2. The pressing member supporting members (8, 16) are
The rail (16) provided on the support frame (2) and the rail (1) arranged on both side surfaces of the pressing member (4).
6) Consists of a roller (8) moving above.
The filtration device according to. 3. The pressing member driving member (6, 7) has a piston rod (6a, 7a) whose tip is the support frame (2).
Fixed to the cylinder case (6b, 7b)
The filter device according to claim 1 or 2, wherein the filter moves relative to the support frame (2). 4. The first closing member (3) and the second closing member (5) fix a filter medium opening closing pressing plate (3b, 5b) to the tip of each piston rod (3a, 5a), The opening of the filter medium (1) is sandwiched between the push plates (3b, 5b) and the support frame (2) so as to be closed.
The filtration device according to any one of 1 to 3.