JPH0558761B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application 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 to perform filtration.

BACKGROUND ART Conventionally, this type of filtration device has been known to have various structures. For example, after closing the lower end opening of the cylindrical filter material, filtration is performed by supplying the stock solution from the upper end opening, and after filtration, the lower end opening of the filter material is opened and the cake inside the filter material is discharged. There is something configured.

Problems to be Solved by the Invention However, with the structure described above, when discharging the cake, the lower end opening of the filter medium is simply opened, so there is a problem that the cake attached to the filter medium cannot be discharged. . In order to solve this problem, it is possible to manually apply vibrations to the filter medium, but the vibration application process is complicated and there are problems in that it is difficult to apply vibrations to the entire filter medium in large filtration equipment. It was hot.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a filtration device that can smoothly discharge cake from a filter medium in order to solve the above problems.

Means for Solving the Problems In order to achieve the above object, the present invention has a structure in which the filter medium is suspended and supported via a vibration imparting member capable of imparting vibration to the filter medium, so that vibration can be easily imparted to the filter medium. . That is, a cylindrical filter medium, a support member that suspends and supports the cylindrical filter medium, and a support member that is interposed between the filter medium and the support member to hold the filter medium in an expanded state and apply vibration to the filter medium when discharging the cake. a vibration imparting member that closes the lower end opening of the filter medium to form the filter medium into a bag-like shape, and after filtration, unblocks the lower end opening of the filter medium to open the lower end; and a first closing member for discharging the cake.

In the above configuration, a second closing member that closes the upper end of the filter medium and the filter medium in which the stock solution is stored and whose upper and lower end openings are closed by the first and second closing members are pressed to perform compression filtration. It can also be configured to include a pressing member that performs this.

Further, in the above configuration, the vibration applying member may include a spring and a vibration applying cylinder, and may be configured to apply vibration to the filter medium by driving the vibration applying cylinder and the urging force of the spring.

Further, in the above configuration, the filter medium can be configured to include a polygonal cylindrical filter medium body and a connecting member that connects the filter medium body and the vibration imparting member.

Moreover, in the said structure, it can also be comprised so that it may include the stock solution supply member which supplies stock solution into the said filter medium from the upper end opening of the said filter medium whose lower end part was closed.

Effects of the Invention In the above structure, after the opening at the lower end of the filter medium is closed with the first closing member, the stock solution is supplied into the filter medium from the opening at the upper end of the filter medium using the stock solution supplying member to perform filtration. After the filtration is completed, the first closing member is driven to open the lower end opening of the filter medium, and the cake held within the filter medium is discharged.
When discharging this cake, the vibration imparting member
Vibrations are applied to the filter medium to remove cake attached to the filter medium.

Further, in the above structure, in which the second closing member and the pressing member are provided, the first closing member closes the lower end opening of the filter medium, and the stock solution supplying member supplies the stock solution into the filter medium. The upper end opening of the filter medium is closed with the second closing member, and the cake inside the filter medium is squeezed through the filter medium with the pressing member to perform press filtration.

Effects of the Invention According to the above configuration, since the vibration imparting member can apply vibration to the filter medium when discharging the cake, the cake attached to the filter medium can also be separated from the filter medium and smoothly discharged. Emission efficiency can be improved. In addition, the device equipped with the above-mentioned pressing member can squeeze the cake inside the filter medium, and can further improve the filtration efficiency of the stock solution. Furthermore, compared to a filter chamber formed between a pair of filter cloths arranged between adjacent filter plates, the filter chamber composed of the above-mentioned cylindrical filter medium has an effective filtration area that covers the entire periphery of the filter chamber. In addition, since the shape of the filter chamber can be changed freely, there is a large degree of freedom, and the filter medium as a whole has various effects such as being easy to shake and the cake is easy to peel off from the filter medium. Filtration efficiency can be significantly improved compared to filtration devices.

Examples Examples according to the present invention will be described in detail below with reference to FIGS. 1 to 9.

As shown in FIGS. 1 to 3, the filtration device according to this embodiment has a rectangular cylindrical filter medium 1 suspended from a support frame 2 serving as a support member in an expanded state via a vibration imparting member. After the opening at the lower end of the filter medium 1 is closed by driving the first closing cylinder 3 as a first closing member, the stock solution is supplied into the filter medium 1 from the opening at the upper end of the filter medium 1 using a stock solution supplying member. The upper end opening is closed by driving the second closing cylinder 5, and the pressing member is driven, that is, the pressing plate 4b is driven by the pressing cylinder 4 to press the filter medium 1 containing the stock solution to perform squeeze filtration. After the filtration is completed, the first closing cylinder 3 releases the closing operation of the lower end of the filter medium 1, opens the lower end, and discharges the cake inside the filter medium 1 below the filter medium. It was roughly configured to impart vibration.

As shown in FIG. 4, the filter medium 1 includes a filter body 1c formed into a rectangular cylindrical shape from a cloth made of polypropylene fibers, an upper end portion of the filter body 1c,
It is composed of support strings 1a, 1b, and 1d as connecting parts that are integrally sewn to the outer surfaces of the middle part and the lower end part. The material of the fibers constituting this filter medium body 1c,
The thickness of the fibers, the coarseness of the mesh, etc. are appropriately selected depending on the properties of the stock solution to be filtered. Therefore, the material of the fibers may be synthetic resin or cotton. Furthermore, after reinforcing a synthetic resin sheet with cloth as a backing, it is also possible to punch a large number of pores in the sheet and use it in the same way as cloth. The size of these pores can be formed to a desired size depending on the properties of the stock solution. Two first support cords 1a, . , 1b are sewn. Further, at the upper end of the filter medium main body 1c, hanging support strings 1d and 1 extending in a U-shape upward in the axial direction of the filter medium are provided.
Sew d.

As shown in FIGS. 1 to 3, the filter medium 1 is attached to the support frame 2 assembled into a rectangular frame shape, and the corners of the filter medium 1 are rotated around its axis by 90 degrees from the corners of the support frame 2. They are supported so that their phases are shifted from each other. FIG. 1 is a front view of the filtration device, FIG. 2 is a right side view of the filtration device, and FIG. 3 is a plan view of the filtration device. The support frame 2 is provided on the front and back sides of the support frame 2.
An upper frame 2a, a middle frame 2b, and a lower frame 2c, which are installed horizontally at the upper, middle, and lower parts of the frame, respectively, are provided with upper and lower frames 2d, 2d, which are provided so as to extend along the vertical direction. Each upper and lower frame 2d is provided with a pair of rolling rollers 22, 22 at both upper and lower ends thereof, and the supporting frame 2d is
It is possible to move along the horizontal direction with respect to the upper frame 2a and the lower frame 2c. Each of the upper and lower frames 2d rotatably supports rollers 18, 21, 20, and 19 at both upper and lower ends, at the middle part, and at the upper part between the middle part and the upper end, and slightly below the middle part. A vibration applying cylinder 17 is provided through a tension spring 16. The first support string 1a at the upper end of the filter medium 1 is connected to the lower end through the upper roller 18, and the first support string 1a at the intermediate portion is connected to the lower end through the roller 20 at the intermediate portion and the roller 19 at a slightly upper portion of the intermediate portion. The first support string 1a of
are respectively engaged with one end of the spring 16 via the lower roller 21 and the upper roller 19, and the other end of the spring 16 is engaged with the piston rod of the cylinder 17. This spring 16 prevents overload from acting on the first support string 1a connected to the cylinder 17. Further, on the right side of the support frame 2, rollers 9, 10, and 11 are rotatably provided at the upper end, middle, and lower end of the side surface, respectively, and one end is supported near the rollers 9, 10, and 11. Tension springs 8, 8, 8 fixed to frame 2
are provided, and the second support string 1b is connected to the respective rollers 9,
10 and 11, respectively, to the other ends of the tension springs 8 at the upper, middle, and lower ends. Further, on the left side surface of the support frame 2, vibration applying cylinders 12, 13, and 14 are provided along the horizontal direction at the upper end, middle, and lower end, respectively, and the piston rods 12a, 13a, 14a of each cylinder 12, 13, 14 are Each of the first support strings 1a at the upper, middle, and lower ends of the filter medium main body 1c is locked at the tip. Therefore, the spring 8 and the cylinders 12, 13, 14, and 17 constitute the vibration imparting member. Therefore, the filter medium 1 is always stretched horizontally within the support frame 2 by the biasing forces of the cylinders 12, 13, 14, 17, 17 and the springs 8, . The cylinders 12, 13, 14,
Vibration is applied to the filter medium 1 by driving the filters 17 and 17 back and forth. Four filter medium hanging frames 6, 6, 6, 6 extending upward in the vertical direction are provided at the upper end of the support frame 2, and two filter medium hanging frames 6, 6 are provided on each of the front side and the back side.
Support rails 7 are fixed horizontally between them. Rolling rollers 15, 15 are provided on these pair of support rails 7, 7 so as to be able to roll freely, and the above-mentioned hanging support strings 1d, 1d are respectively locked to the rolling rollers 15, 15, so that the support frame 2 The filter medium 1 is suspended and supported.

On the left side surface of the support frame 2, a second closing cylinder 5 is provided on the upper frame 2a, a pressing cylinder 4 is provided on the middle frame 2b,
The first closing cylinders 3 are fixed to the lower frame 2c along the horizontal direction. In the first closing cylinder 3, a push plate 3b having a pentagonal shape in a vertical cross-sectional front view is fixed to the tip of the piston rod 3a, and the inner surface of the lower frame 2c on the right side facing the tip of the push plate 3b is fixed to the tip of the piston rod 3a. The push plate receiving portion 24 is fixed. Therefore, the first closing cylinder 3 is driven to sandwich and press the lower end of the filter medium 1 between the press plate 3b and its receiving portion 24, thereby closing the opening at the lower end of the filter medium 1. In the second closing cylinder 5, a push plate 5b having a pentagonal shape in a vertical cross-sectional front view is fixed to the tip of the piston rod 5a, and the inner surface of the upper frame 2a on the right side facing the tip of the push plate 5b is fixed to the tip of the piston rod 5a. The push plate receiving portion 23 is fixed. Therefore, by driving the second closing cylinder 5, the pushing plate 5b is
The upper end of the filter medium 1 is sandwiched and pressed between the receiving portion 23 and the receiving portion 23 to close the upper end opening of the filter medium 1. The pressure cylinder 4 has a pressure plate 4 at the tip of a cylinder case 4a that houses the piston rod.
b is supported, and the cylinder cake 4a moves toward the filter medium 1 with respect to the piston rod by driving the press cylinder 4, and presses the press plate 4b from the left side of the filter medium 1 toward the right side, thereby removing the cake inside the filter medium 1. Pressing plate 4
b and the support frame 2 to perform compression filtration.

On the other hand, the support frame 2 is supported by struts 30, . That is, a pair of sprockets 26,
A chain 27 is hung between 26 and the filtrate receiving tray 25 is locked to the chain 27. By the way, chain 2
7, the filtrate receiving tray 25 moves between a filtrate receiving position A below the filter medium 1 in the support frame 2 and a retracted position B retracted from below the filter medium 1. Further, below the filtrate receiving tray 25, there is a cake recovery conveyor 29 for recovering the cake.
The conveyor 29 collects the cake that has fallen from the filter medium 1 under its own weight and conveys it to a predetermined location. In addition, in FIG. 2, 32 is a guide plate that guides the cake that has fallen from the filter medium 1 onto the conveyor 29.

The stock solution supply member has a stock solution supply pipe 33 above the filter medium 1 as shown in FIG. is supplied to the filter chamber.
There are various types of stock solution, such as a liquid containing about 0.1 to 2% solids, or a liquid containing several % or more of solids suitable for filtering with a filter press.

According to the above configuration, as shown in FIG. 5, the spring 8 and the cylinders 12, 13, 14,
At 17, the filter medium 1 is suspended and supported in the shape of a square cylinder.

Next, as shown in FIG. 6, the first closing cylinder 3 is driven to close the lower end opening of the filter medium 1.
At this time, the piston rod 14a of the vibration applying cylinder 14 at the lower end is connected to the second support string 1b of the filter medium 1.
Move it to the right in the diagram to prevent overload from acting on it. Further, the filtrate receiving tray 25 is moved from the retracted position B to the filtrate receiving position A by driving the chain 27, so that it can receive the filtrate.

Next, as shown in FIG. 7, the stock solution is supplied into the bag-shaped filter medium 1 whose lower end is closed through the stock solution supply pipe 33 of the stock solution supply member through the opening at the top end of the filter medium 1. Perform filtration. At this time, filter medium 1
The dripped filtrate is received by the filtrate receiving tray 25 and collected by the filtrate collection member 28.

Next, as shown in FIG. 8, the second closing cylinder 5 is driven to close the upper end opening of the filter medium 1.
At this time, the piston rod 12a of the vibration imparting cylinder 12 at the upper end is connected to the second support string 1b of the filter medium 1.
Move it to the right in the diagram to prevent overload from acting on it.

Next, as shown in FIG.
is driven to move the filter medium 1 between the press plate 4b and the support frame 2.
is gradually pressed to squeeze out the cake 34 inside the filter medium 1. At this time, the piston rod 13a of the intermediate vibration applying cylinder 13 moves to the right in the figure so as not to apply an overload to the second support string 1b of the filter medium 1.

Next, after the squeeze filtration is completed, as shown in FIG. 5, the pressure cylinder 4 is reversely driven to release the compression of the filter medium 1 by the pressure plate 4b, and the filtrate receiving tray 25 is moved from the filtrate receiving position A to the retracted position B. move it. Further, the first and second closed cylinders 3 and 5 are reversely driven to open the openings at both upper and lower ends of the filter medium 1, and the cake 34 inside the filter medium 1 is caused to fall below the filter medium by its own weight, and is collected by the conveyor 29. At this time, the vibration applying cylinders 12, 13, 14, and 17 are driven to apply vibration to the filter medium 1, and the vibration applied to the filter medium 1 causes the spring 8 to repeatedly contract and increase the vibration. Gives vibration to the whole body. The vibration applying cylinders 12, 13, 14 and the vibration applying cylinder 17 are driven alternately, thereby causing the filter medium 1 to
Vibration can be applied to the entire filter medium by being pulled alternately from 90 degrees different directions. The above vibration imparting cylinder 1
2, 13, and 14 are driven, the filter medium 1 moves in the left-right direction in FIG.
2, ..., 22 to prevent overload from acting on the filter medium 1 by moving it relative to the support frame 2. Due to the vibration application, the cake 34 attached to the filter medium 1
The filter medium 1 is also separated from the filter medium 1 and falls, and is collected by the conveyor 29. When the collection of the cake 34 is completed, the first closing cylinder 3 is driven to close the lower end opening of the filter medium 1, as shown in FIG. 6, again in preparation for the next filtration.

In the above filtration, when squeeze filtration is not performed, the stock solution is supplied to the filter medium 1 whose lower end opening is closed, and when the filtration work is completed, the filtrate receiving tray 25 is moved to the retracted position B, and the above-mentioned The first closed cylinder 3 is reversely driven to open the lower end opening of the filter medium 1, and the cake discharge operation is performed while applying vibration to the filter medium 1 with the vibration applying member.

According to the above embodiment, since the vibration imparting member applies vibration to the filter medium 1 when discharging the cake, the cake 34 attached to the filter medium 1 can also be smoothly discharged, and the cake 34 can be smoothly discharged. Emission efficiency can be improved. Further, by driving the pressing cylinder 4, the cake 34 in the filter medium 1 can be squeezed by the pressing plate 4b, and the filtration efficiency of the stock solution can be further improved. Further, while the filter medium 1 can be formed into a bag-like shape by simply sandwiching the lower end of the filter medium 1 between the push plate 3b of the first closing cylinder 3 and its receiving portion 24, the filter medium 1 can be formed into a bag-like shape by reversely driving the cylinder 3. If you release the pinch at the bottom edge,
Since the lower end opening of the filter medium 1 is forcibly opened by the weight of the cake 34 and the cake 34 is discharged, the opening/closing structure of the lower end of the filter medium 1 becomes very simple. Moreover, if the vibration applying cylinders 12, 13, 14 and the vibration applying cylinder 17 are driven alternately, the filter medium 1 can be moved between the cylinders 12, 1
The directions in which the filter media 3 and 14 and the cylinder 17 are pulled, that is, the direction of vibration, change alternately by 90 degrees, making it possible to apply sufficient vibration to the filter medium 1. Also,
When the filter medium 1 is locked to the vibration imparting cylinders 12, 13, 14, 17 and the spring 8 via the support strings 1a, 1b, if the filter medium 1 is removably locked, for example, by tying, the support strings 1a, 1b can be tied. By untying it, the connection between the cylinder and the spring can be easily released. Moreover, the filter chamber composed of the square cylindrical filter medium 1 is compared with the filter chamber formed between a pair of filter cloths arranged between adjacent filter plates.
The entire periphery of the filter chamber is the effective filtration area, and the shape of the filter chamber itself can be changed, so there is a large degree of freedom, and the filter medium as a whole is easy to oscillate, so that the cake 34 does not peel off from the filter medium 1. It has various effects such as ease of use, and can significantly improve filtration efficiency compared to a filter plate type filtration device.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in various other ways. For example, the spring 8 and cylinders 12, 13, 14, 17 that support the filter medium 1 are connected to the support strings 1a, 1b.
It may be configured so that it is directly connected to the filter medium main body 1c without going through it. Further, depending on the length of the filter medium 1 in the vertical direction, the support points of the filter medium 1 and the number of support strings at each point can be arbitrarily increased or decreased. Further, as a support structure for the filter medium 1, one corner of the filter medium 1 is fixed to the support frame 2, and the corner opposite to this fixed corner is connected to the vibration imparting cylinders 12, 13, 1.
4, and the remaining two corners are supported by springs 8, and the vibration applying cylinders 12, 13, 1
4 may be configured to apply vibration to the filter medium 1. Alternatively, the filter medium 1 may be suspended and supported only by a spring, and the filter medium 1 may be struck at a predetermined time to apply vibrations. Further, the filter medium 1 is not limited to a square cylinder, but may have any polygonal shape such as a triangular cylinder or a pentagonal cylinder. In addition, the first and second closing cylinders 3 and 5 and the pressing cylinder 4
may be an air cylinder or a hydraulic cylinder, and other known drive means may be used to perform the same action. Further, the pressing action of the pressing cylinder 4 on the filter medium 1 is not limited to pressing from one direction, but may press the filter medium 1 from two directions.

[Brief explanation of drawings]

1 to 3 are a front view, a right side view, a plan view, and a fourth filtration device showing a filtration device according to an embodiment of the present invention, respectively.
The figure is a schematic perspective view of the filter medium, and FIGS. 5 to 9 are partially sectional side views showing the operating state of the filter device, respectively. DESCRIPTION OF SYMBOLS 1... Filter medium, 1a... First support string, 1b... Second support string, 1c... Filter medium main body, 1d... Support string for hanging, 2... Support frame, 2a... Upper frame, 2b...
...Middle frame, 2c...Lower frame, 3...First closing cylinder, 3b...Press plate, 4...Press cylinder, 4b...
...Press plate, 5...Second closing cylinder, 5b...Press plate, 6...Filter medium hanging frame, 7...Support rail, 8...
Spring, 9, 10, 11, 18, 19, 20, 21
... Roller, 12, 13, 14, 17 ... Vibration applying cylinder, 15 ... Rolling roller, 16 ... Spring, 22 ... Rolling roller, 23, 24 ... Pressure receiver, 25 ... Filtrate receiver , 26... sprocket, 27... chain, 28... filtrate collection member,
29... Conveyor, 30... Support, 31... Installation floor, 32... Guide plate, 33... Stock solution supply pipe, 34
……cake.

Claims (1)

[Scope of Claims] 1. A cylindrical filter medium 1, a support member 2 that suspends and supports the cylindrical filter medium 1, and a support member 2 that is interposed between the filter medium 1 and the support member 2 to hold the filter medium 1 in an expanded state. At the same time, vibration imparting members 8, 12, 13, 14, and 17 apply vibration to the filter medium 1 during cake discharge; and a first closing member 3 which releases the blockage of the opening at the lower end of the filter medium 1 to open the lower end and discharge the cake inside the filter medium. 2 a second closing member 5 for closing the upper end of the filter medium 1; a second closing member 5 for storing the stock solution;
The filtration device according to claim 1, further comprising a pressing member 4 that presses the filter medium 1 whose upper and lower end openings are closed by the closing members 3 and 5 to perform compressive filtration. 3 The vibration imparting member 8, 12, 13, 14, 1
7 is a spring 8 and vibration applying cylinders 12, 13, 1
4, 17, the vibration applying cylinders 12, 1
3, 14, and 17 and the urging force of the spring 8 to impart vibration to the filter medium 1. The filter device according to claim 1, wherein vibration is applied to the filter medium 1 by driving of the filters 3, 14, and 17 and the biasing force of the spring 8. 4 The filter medium 1 has a polygonal cylindrical filter body 1c.
, the filter medium main body 1c and the vibration imparting members 8, 1
Connecting member 1 that connects 2, 13, 14, 17
A filtration device according to any one of claims 1 to 3, comprising: a and lb. 5. Claims 1 to 4, comprising a stock solution supplying member 33 that supplies stock solution into the filter medium 1 from an opening at the top end of the filter medium 1 whose bottom end is closed.
The filtration device according to any one of paragraphs.