JPH0356764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a filter press that has a pair of filter cloths between adjacent filter plates and winds up or unwinds the filter cloths.

Conventional technology Conventionally, a pair of filter cloths suspended from a drive shaft placed above the filter plates are sandwiched between adjacent filter plates, and when the frame is closed, the filter plates are tightened to separate the pair of filter cloths between the adjacent filter plates. Filtration is performed by supplying the stock solution between the filter cloths, and when the frame is opened, the filter plate is opened to discharge the cake between the filter cloths, and the pair of filter cloths are lowered by the rotation of the drive shaft to perform filtration. There is one in which a filter cloth unwinding device located below the plate is configured to unwind the filter cloth (Japanese Patent Publication No. 37928/1983).

Problems to be Solved by the Invention However, in the structure described above, when the pair of filter cloths are lowered by the rotation of the drive shaft, they are lowered at the same speed at the same time, so the cake sticks tightly between the pair of filter cloths. In some cases, the problem was that it was difficult to separate this cake from each filter cloth.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a filter press capable of reliably peeling off a cake stuck between a pair of filter cloths from the filter cloths in order to solve the above-mentioned problems.

Means for Solving the Problems In order to achieve the above object, the present invention provides the following advantages: When unwinding a pair of filter cloths between adjacent filter plates, the unwinding speeds of the pair of filter cloths are made different from each other.
The structure was such that the cake stuck between both filter cloths was forcibly peeled off from the filter cloths. That is, a pair of filter cloths is arranged between adjacent filter plates, a filter cloth winding device for suspending and supporting the pair of filter cloths is arranged above the filter plate, and the pair of filter cloths are unwound downward. A filter cloth rewinding device is disposed below the filter plate, and the filter cloth rewinding device rewinds the pair of filter cloths below the filter plate, while the filter cloth winding device rewinds the pair of filter cloths to the adjacent filter plate. In the filter press configured to wind up the filter cloths to a predetermined position between the filter cloths, the filter cloth rewinding device is configured to make the unwinding speeds of the pair of filter cloths different from each other when unwinding the filter cloths.

In the above configuration, the filter cloth rewinding device includes a pair of filter cloth rewinding shafts each having a pair of filter cloth rewinding shafts connected to each other at the lower ends of the pair of filter cloths between the adjacent filter plates and having different filter cloth rewinding shaft diameters. The pair of filter cloths may be unwound by rotating the cloth unwinding shaft in the filter cloth rewinding direction.

In the above configuration, the filter cloth winding device may be configured to integrally and simultaneously wind up the pair of filter cloths to the predetermined position when winding up the filter cloths.

Further, in the above configuration, the filter cloth winding device includes a filter cloth positioning drive pulley and a pair of filter cloth winding drive pulleys, each having a different diameter dimension.
and a hoisting shaft for rotating these drive pulleys, the diameter of the drive pulley for filter cloth positioning is the largest among the drive pulleys, and the drive pulley for filter cloth positioning has a winding shaft that rotates the adjacent filter plate. The upper portions of the pair of filter cloths between them are connected via string-like members, and both filter cloths are simultaneously wound up. Among the pair of filter cloths between the filter plates, the upper part of one of the filter cloths connected to the filter cloth unwinding shaft having a larger diameter is connected via a string-like member, and the pair of filter cloths are wound Of the upper drive pulleys, the drive pulley with the smaller diameter is connected to the filter cloth unwinding shaft of the other of the pair of filter cloths between the adjacent filter plates, which is connected to the filter cloth unwinding shaft with the smaller diameter. It is also possible to configure the upper part to be connected via a string-like member.

In the above configuration, each of the filter plates is constituted by a frame having a space penetrating therein in the thickness direction of the filter plate, and the pair of filter cloths sandwiching each of the filter plates are formed by each frame of each filter plate. are arranged on both sides in the thickness direction of the frame to surround the space formed inside the frame, and the winding and unwinding operations of the filter cloths are performed outside of the filter plates. You can also do it.

Further, in the above configuration, each of the pair of filter cloths between the adjacent filter plates is provided with a stock solution supply port, and a through hole communicating with the stock solution supply port is provided at the periphery of the stock solution supply port. Equipped with a stock solution supply plate,
When the filter plates are tightened, the stock solution supply ports of each of the filter cloths and the through holes of each of the stock solution supply plates form a communication tube for stock solution supply, and the stock solution is supplied between a pair of filter cloths between adjacent filter plates. Each surface of the plate has protrusions, and when the filter plate is tightened, the protrusions come into contact with the opposing stock solution supply plate,
It is also possible to form a gap that communicates with the communication pipe between both stock solution supply plates.

Furthermore, in the above configuration, each of the filter plates is
Consisting of a filter bed and a frame surrounding the filter bed, a pair of filter cloths sandwiching the filter plate are arranged on both sides in the thickness direction of each frame of each filter plate, and are configured to sandwich the filter bed. You can also.

Effects and Effects of the Invention In the above configuration, after a plurality of filter plates are tightened to perform filtration work, when the cake held between a pair of filter cloths between adjacent filter plates with the filter frames opened is discharged. , a pair of filter cloths between adjacent filter plates is lowered by driving the filter cloth rewinding device. At this time, by making the unwinding speeds of the pair of filter cloths different from each other, it is possible to forcibly separate the cake stuck between the pair of filter cloths from each filter cloth, thereby improving cake discharge performance. I can do it. Further, in the filter cloth rewinding device, if the pair of filter cloths is configured to be unwound by filter cloth rewinding shafts having different shaft diameters, the unwinding speeds of the pair of filter cloths can be made different from each other even with a simple structure. be able to.

Furthermore, in the above filter cloth winding device, when winding up a pair of filter cloths, by winding up both filter cloths at the same time, the pair of filter cloths can be reliably positioned at predetermined positions at the same time between adjacent filter plates. It is possible,
This simplifies the work of positioning the filter cloth. Therefore, for example, the positions of the stock solution supply ports of each filter cloth can be easily matched, and the stock solution in the filter chamber between each pair of filter cloths can be stably supplied.

Furthermore, if the filter cloth with a faster filter cloth unwinding speed is connected to the filter cloth positioning drive pulley, which has a large winding and unwinding amount, in the filter cloth winding device, when the filter cloth is unwinded, the filter cloth winding device The amount of unwinding of the filter cloth relative to the filter cloth is increased, the filter cloth is smoothly unwound onto the filter cloth unwinding shaft, and overload can be effectively prevented from being applied to the filter cloth.

Examples Examples according to the present invention will be described in detail below with reference to FIGS. 1 to 5.

As shown in FIG. 1, the filter press according to the present embodiment has side beams 4, 4 installed between both sides of a front stand 1 and a rear stand 3, which support a main plate 2. A large number of filter plates 5, . The pair of handles 5f, 5f are slidably placed on the side beams 4, 4 so as to be movable in the front and back direction, and the movable plate 7 is moved by a drive piston 8 supported on the rear stand 3. The filter plates 5, . . . , 5 are tightened by driving the filter plates 5, .
5 at predetermined intervals. In this filter press, the filter plate 5,
..., 5 above each pair of filter cloths 16, 16.
A filter cloth hoisting device 31 is disposed connected to the upper part of the filter cloths 16 to suspend and support the filter cloths 16, 16, and below the filter plates 5, . . .
A filter cloth rewinding device 32 connected to the lower part of the filters 6, 16 and rewinding both the filter cloths 16, 16 downward is arranged, and the filter cloth rewinding device 32 rewinds the filter cloths 16, . . . , 16 below the filter plates. On the other hand, the filter cloth winding device 31 winds up each filter cloth 16 to a predetermined position between the adjacent filter plates 5, 5.

As shown in FIGS. 2 and 3, the filter plate 5 includes a frame 5a having a space 5b penetrating therein in the thickness direction of the filter plate, and a frame 5a arranged on both sides of the frame 5a in the thickness direction. A pair of filter cloths 16, 16 are sandwiched between adjacent frames 5a, 5a, and the filter cloths 16, 1 are sandwiched between adjacent frames 5a, 5a.
Filtration is performed by pressurizing the stock solution into the filtration chamber 33 between 6 spaces,
While the cake is held in the filter chamber 33 between the filter cloths 16, 16, the filtrate is collected in the space 5b in each frame 5a through each filter cloth 16, 16, and the filtrate is guided to the lower part of the frame 5a. Configure to collect.

The frame body 5a is a member whose horizontal cross section and vertical cross section are approximately pentagonal in shape, and has inclined surfaces 5c, 5c on the inner surface which are inclined from the center in the thickness direction to both sides, respectively. The above-mentioned handles 5f, 5f are provided at the upper end of the side surface of each frame 5a, and the above-mentioned handles 5f, 5f are installed on the side beams 4, 4, which are installed on the sides between the front and rear stands 1, 3 of the filter press, respectively.
The frame bodies 5a are suspended and supported by each frame body 5a being slidably mounted, and the back and forth movement of each frame body 5a is guided. The above frame body 5
A filtrate collection port 5d penetrating in the thickness direction is formed at each lower part of the side surface of the frame 5a, and a space 5 formed inside the frame 5a is formed at each lower corner of the frame 5a.
A communication hole 5e that communicates b with the filtrate collection port 5c.
form.

Each of the filter cloths 16 is formed by appropriately selecting from various conventionally known materials.
A filter cloth hanging rod 18 is fixed to the upper end, and the filter cloth hanging rod 18 is connected to the filter cloth winding device 31, while the lower end of each filter cloth 16 is locked to the filter cloth rewinding device 32. Each of the filter cloths 16 is arranged at the front and rear of the frame 5a of the filter plate 5, and covers both sides of the frame 5a in the thickness direction (both sides in the front and rear direction of the filter press).
sandwich the space 5b formed inside a. Each filter cloth 1
A circular stock solution supply port 16a is formed at a position slightly above the center of the frame 5a of No. 6, and an annular stock solution supply plate 34 is fixed to the periphery of the stock solution supply port 16a. This stock solution supply plate 34
As shown in FIGS. 4 and 5, a pair of filter cloths 16,
16, a top plate 34a facing the other filter cloth 16 opposite to the filter cloth 16 to which the stock solution supply plate 34 is attached and having a large number of cylindrical protrusions 34b on its surface;
The front plate 34a is generally constituted by a back plate 34c fixed to the filter cloth 16 with the filter cloth 16 in between.
Through holes 34d and 34 are provided in both plates 34a and 34c.
e respectively, the stock solution supply port 16 of the filter cloth 16
a and constitutes a communication pipe for supplying the stock solution.

On the other hand, the filter cloth winding device 31 has a pair of left and right winding shafts 9, 9 each having a polygonal cross-section, supported between both upper sides of the front stand 1 and rear stand 3, respectively. A polygonal cylindrical member 20 is fitted between the filter plates so as to be slidable in the axial direction, and three first, second, and
While fixing the third drive pulleys 21, 22, 23, one end of each hoisting shaft 9 is connected to the bevel gear transmission mechanism 14.
It is connected to a motor 13 with a speed reducer through the motor 13, and the hoisting shafts 9, 9 are synchronously rotated in the forward and reverse directions by the forward and reverse drive of the motor 13. The cylinder member 20
are mutually connected to cylinder members 20 adjacent to each other along the axial direction by a connecting link 6, and the cylinder member 20 adjacent to the movable plate 7 is connected to the support member 7 of the movable plate 7.
A is connected with a connecting link 6. The axial length of the cylinder member 20 is such that the first drive pulley 21 is positioned above the space between the adjacent filter plates 5 when each filter plate 5 is tightened. Among the driving pulleys 21, 22, and 23, the driving pulley 21 with the largest diameter dimension, that is, the first driving pulley 21 for positioning the filter cloth has a first wire 24 as a string-like member whose lower end is locked to a connecting rod 35. wrap around it. This connecting rod 35 is connected to the filter cloth hanging rods 18, 18 at the upper ends of the pair of filter cloths 16, 16 between the adjacent filter plates 5, 5 through a pair of auxiliary wires 36, 36. Of the remaining drive pulleys 22 and 23, the second drive pulley 22 on the left side in FIG.
Filter cloth hanging rod 18 at the upper end of the left filter cloth 16 among 16
A second wire 25 serving as a string-like member having a fixed lower end is wound around the wire. The remaining drive pulley 23, that is, the third drive pulley 23 having the smallest diameter on the right side in FIG. A third wire 26 serving as a string-like member having a fixed lower end is wound around the wire 18.

Further, the filter cloth rewinding device 32 is configured as follows. That is, a pair of left and right inverted L-shaped fittings 19, 19 are attached to the lower surface of the frame 5a of each filter plate 5, and a first filter cloth unwinding roller serving as a filter cloth unwinding shaft is installed between the right and left fittings 19, 19. 27 and a second filter cloth rewinding roller 28 are rotatably arranged. The filter cloth rewinding diameter dimension (outer diameter dimension) of the first filter cloth rewinding roller 27 is larger than the filter cloth rewinding diameter dimension (outer diameter dimension) of the second filter cloth rewinding roller 28 , and this first filter cloth rewinding roller 27 In this step, the lower end of the filter cloth 16 on the left side in FIG. 2 of the pair of filter cloths 16, 16 between the adjacent filter plates 5, 5 is locked. Further, the second filter cloth rewinding roller 2
8, of the pair of filter cloths 16, 16, the second
Lock the lower end of the filter cloth 16 on the right side in the figure. As shown in FIG. 3, one of the fittings 19 on the sides of the first and second filter cloth rewinding rollers 27, 28 is provided with a spring that constantly biases both the rollers 27, 28 in the rewinding direction. A filter cloth rewinding spring device 30 with built-in filter cloth rewinding spring devices 30
is installed. the pair of fittings 19,
19 and the two filter cloth rewinding rollers 27, 2
8 is provided with a cleaning pipe 42 having a large number of upward and bifurcated cleaning nozzles 43, . 1 Filter cloth rewinding roller 27
A washing water avoidance plate 29 is provided to prevent washing water from falling on the water. The cleaning pipe 42 connects the cleaning nozzle 4
A pair of filter cloths 16, 16 between adjacent filter plates 5, 5 facing filter plates 3, . . . , 43 are cleaned.

The above configuration operates as follows.

That is, a large number of filter plates 5, .
Tighten 5 to the front stand side. At this time, each support member 7a on the upper part of the movable plate 7 is
Since the cylindrical members 20, . , ..., 5 along the axial direction toward the front stand.

When the filter plates 5, ..., 5 are tightened, the protrusions 34 of the stock solution supply plate 34 attached to each filter cloth 16
b, ..., 34b butt against each other along the thickness direction of the filter plate, and the top plate 34a of the stock solution supply plate 34
and between the protrusions 34b and 34b that abut against each other.
A gap is formed between the stock solution supply port 16a of each filter cloth 16 and the through holes 34d, 3 of each stock solution supply plate 34.
4e communicate with each other to form a communication pipe for supplying the stock solution. This communication pipe also communicates with each of the above-mentioned spaces. Therefore, the stock solution is transferred from the stock solution supply port 16a of each filter cloth 16, that is, the communication pipe, to the filter chamber 33 formed between the pair of filter cloths 16, 16 between the adjacent filter plates 5, 5 through the above-mentioned gap. The stock solution is filtered through each filter cloth 16 to separate it into a cake and a filtrate. The cake is held as it is in the filter chamber 33 between the pair of filter cloths 16, 16, while the filtrate passes through each filter cloth 16, enters the inside of the frame 5a, and is guided downward by the filter cloths 16, 16. As the filtrate flows down or falls within the frame 5a, the filtrate is guided to the lower part of the frame 5a and passes through the communication hole 5e of the frame 5a to the filtrate recovery port 5.
d and is collected.

When discharging the cake, the movable plate 7 retreats, and each cylindrical member 20 connected to each support member 7a via a communication link 6 retreats along each hoisting shaft 9. At this time, the filter plate 5 connected to the movable plate 7 by a connecting link (not shown) also begins to move backward. When all the filter plates 5, .
The large cake held between the two will fall due to its own weight. Then, the motor 13 is driven to rotate the hoisting shafts 9, 9 synchronously, and each drive pulley 2
1, 22, 23, each wire 24, 2
Loosen 5 and 26. Then, a pair of filter cloths 16,1
Since the filter cloths 6 are constantly urged in the rewinding direction by the filter cloth rewinding rollers 27 and 28, each filter cloth 16 begins to descend. At this time, the first filter cloth rewinding roller 27
Since the unwinding diameters of the filter cloth rewinding roller 28 and the second filter cloth rewinding roller 28 are different from each other, the pair of filter cloths 16, 16 between the adjacent filter plates 5, 5 do not descend at the same speed at the same time, but as shown in FIG. A pair of filter cloths 1 between adjacent filter plates of
6, 16, the left filter cloth 16 is the right filter cloth 16
It descends and rewinds faster than the Therefore, the cake that was stuck between the pair of filter cloths 16, 16 was
It is forcibly separated from each filter cloth 16 and falls downward due to its own weight. During this filter cloth rewinding operation, since the second driving pulley 22 has a larger diameter than the third driving pulley 23, the amount of unwinding of the wire 25 is greater than the amount of unwinding of the wire 26 that the third driving pulley 23 rewinds. is large, and each filter cloth 16 on the left side is easily rewound by the first filter cloth rewinding roller 27. At this time, the first drive pulley 21 is connected to the second drive pulley 2.
2, and the amount of unwinding of the wire 24 is large, so the unwinding operation of the filter cloths 16, 16 is not inhibited. When each filter cloth 16 is rewound by each filter cloth rewinding roller 27, 28 and rewound to such an extent that each stock solution supply plate 34 contacts the rollers 27, 28, the leftmost adjacent filter in FIG. As shown between the plates, the filter cloth 1 on the right side of the pair of filter cloths 16, 16
The filter cloth hanging rod 18 of No. 6 is the filter cloth hanging rod 1 of the filter cloth 16 on the left side.
8, and the connecting rod 36 is located at an intermediate position between the filter cloth hanging rods 18, 18. In this state, the driving of the motor 13 is stopped. If necessary, the cleaning nozzles 43,..., 43 of the cleaning pipe 42 can be used to clean the filter cloths 16, 1.
6 washing is performed.

Next, when each filter cloth 16 is positioned at a predetermined position between adjacent filter plates, the motor 13
3 is reversely driven, and the winding shafts 9, 9 are rotated in the opposite direction. Then, each of the drive pulleys 21, 22, 2
3 rotates in the opposite direction to wind up each wire 24, 25, 26. At this time, since the diameter of the first drive pulley 21 is larger than that of the other drive pulleys 22 and 23, the amount of winding of the wire 24 is large, and the connecting rod 35 connected to this wire 24 is connected to the other filter cloth hangers. stick 1
It is pulled upward faster than 8,18. Then,
Both filter cloth hanging rods 18,
18 is raised together with the connecting rod 35, and the pair of filter cloths 16, 16 are raised simultaneously, and the motor 13 is stopped by the operation of the limit switch, and the filter cloths 16, 16 are moved between the adjacent filter plates 5, 5. position. When the filter cloth hanging rods 18, 18 rise as the connecting rod 35 rises, the other wires 2
5 and 26 become loose, but eventually the filter cloth 1
6, 16 are located at the predetermined positions, the second
As shown between the second adjacent filter plates 5, 5 from the right in the figure, both the filter cloth hanging rods 18, 18 are located at the same position along the vertical direction, and the filter cloth hanging rods 18, 18 are located at the same position along the vertical direction.
The wires 25 and 26 that are locked to the wires 25 and 26 are also in a state where there is no slack. In the filter cloth unwinding state, the left filter cloth hanging rod 1 of the pair of filter cloth hanging rods 18, 18 is
8 was located below the filter cloth hanging rod 18 on the right side, but based on the diameter dimensions of the second and third drive pulleys 22 and 23, the filter cloth 16 on the left side was wound up more than the filter cloth 16 on the right side. This is because, since the amount is large, the difference in the time of unwinding the filter cloth disappears and the filter cloths are located at the same position. After that, the movable plate 7 moves the filter plate 5,
..., 5, and perform the next filtration work.

According to the above embodiment, the following effects can be obtained.

That is, when a plurality of filter plates 5, ..., 5 are tightened to perform filtration work, and then the filter plates 5, ..., 5 are opened to discharge the cake, a pair of filters between adjacent filter plates 5, 5 is removed. The cloths 16, 16 are lowered by driving the filter cloth rewinding device 32. At this time, the unwinding speeds of the pair of filter cloths 16, 16 are made to be different from each other, so that even if the cake sticks tightly between the pair of filter cloths 16, 16 and is difficult to peel off from the filter cloths 16, 16, However, by unwinding the pair of filter cloths 16 and 16 at different speeds, the cake is removed from the filter cloth 1.
The cake can be forcibly peeled off from the cakes 6 and 16, and the cake discharge performance can be improved. Also,
In the filter cloth rewinding device 32, the filter cloth rewinding rollers 27 and 28 are configured to have different unwinding diameter dimensions, so that even with a simple structure, the pair of filter cloths 1
The unwinding speeds of 6 and 16 can be made different from each other.

In addition, in the filter cloth winding device 31, when winding up the pair of filter cloths 16, 16, both filter cloths 16, 1 are simultaneously driven by rotation of the first drive pulley 21.
6 is rolled up, the pair of filter cloths 16, 16 can be reliably positioned simultaneously at a predetermined position between the adjacent filter plates 5, 5, and the filter cloths 16, 1
This simplifies the positioning work in step 6. That is, if the filter cloth 1 is moved not by the first drive pulley 21 but by the second and third drive pulleys 22 and 23, respectively.
When winding up the filter cloths 16, 16, the positions at which the pair of filter cloths 16, 16 are wound up differ from each other between the adjacent filter plates 5, 5 due to the elongation of the filter cloths 16, 16. The positioning work for aligning the positions becomes extremely complicated. On the contrary,
If both filter cloths 16, 16 are simultaneously wound up by the first drive pulley 21, the above problem will not occur.
Therefore, the positions of the stock solution supply ports 16a of each filter cloth 16 can be easily matched, and each pair of filter cloths 1
The filtrate can be stably supplied to the filter chamber 33 between 6 and 16. Note that when the filter cloths 16, 16 are unwinded, the amount of unwinding of the wire 24 of the first drive pulley 21 is always larger than the amount of unwinding of the other wires 25, 26. There is no adverse effect on the return operation.

In addition, the filter cloth 16 has a faster filter cloth unwinding speed,
Since the filter cloth winding device 31 is connected to the first driving pulley 21 which has a large winding and unwinding amount, the amount of unwinding of the wire 24 unwinding from the first driving pulley 21 during the filter cloth winding operation is reduced. The filter cloth 16 is smoothly rewound onto the first filter cloth rewinding roller 27, and overload can be effectively prevented from being applied to the filter cloth 16.

Further, each drive pulley 21, 2 is attached to the cylinder member 20.
2, 23, by moving together with the filter plates 5, 5 of the cylindrical member 20, the filter plates 5, 23 are provided.
..., 5 during the opening/closing operation of the drive pulleys 21, 2.
2, 23 can be easily made to follow each filter plate 5, and no overload is applied to the wires 24, 25, 26 or the filter cloths 16, 16.

In addition, in the filter cloth winding device 31, the drive pulleys 21, 22, 23 have different diameter dimensions, so that even with a simple structure, the amount of winding and unwinding of the pair of filter cloths 16, 16 can be ensured. can be made different from each other.

Note that the present invention is not limited to the above embodiments, and various other embodiments can be implemented.

For example, although the filter plate 5 described above has no filter bed within the frame body 5a, the present invention can also be applied to a filter press having a filter plate with a filter bed integrally formed within the frame body 5a. Can be applied.

Further, the filter cloth winding device 31 includes a pair of second winding shafts in addition to the pair of winding shafts 9, 9, and the second winding shafts are connected to the first drive pulleys 21, 2.
1, and drive pulleys 2 having different diameters as described above are fitted to the hoisting shafts 9, 9.
2 and 23 may be fitted together. In this case, by making the drive speeds of the winding shafts 9, 9 and the second winding shaft different, the pair of filter cloths 16, 16 are simultaneously rolled up, while the amount of unwinding of the pair of filter cloths 16, 16 is controlled. It may be possible to rewind with different values. Furthermore, in this modification, the drive pulleys 22, 23
It is also possible to provide the same effects as in the above embodiment by providing the drive pulleys on separate hoisting shafts, making the diameter dimensions of each drive pulley the same, and making the rotational speeds of the hoisting shafts different.

Further, in the filter cloth rewinding device 32, each of the filter cloth rewinding rollers 27, 28 always rotates the filter cloths 16, 1
Instead of rotationally biasing the filter cloths 16 in the rewinding direction, the filter cloths 16 may be driven to rewind during rewinding to perform the rewinding operation of the filter cloths 16, 16. Further, instead of making the unwinding diameter dimensions of the filter cloth rewinding rollers 27 and 28 the same, the rotational driving forces of both rollers 27 and 28 are made different from each other, so that different unwinding speeds are generated in the filter cloths 16 and 16. You can also do this.

Further, the stock solution supply port 16a of each filter cloth 16 and the stock solution supply plate 34 may be arranged at any location on the filtration surface inside the frame, and the center part of the upper or lower part of the frame 5a may be placed upwardly or The frame body 5a may be curved and protruded downward in a U-shape, and the stock solution supply port 16a and the stock solution supply plate 34 may be provided within the protruding portion of the frame body 5a. Further, the shape of the frame 5a is not limited to a rectangular shape, but may be any shape such as a circle.

[Brief explanation of drawings]

FIG. 1 is a side view of a filter press according to an embodiment of the present invention, FIGS. 2 and 3 are an enlarged side view of essential parts of the filter press and a cross-sectional view taken along the line -- in FIG. 2, and FIGS. 4 and 5 are 5A and 5B are a front view and a cross-sectional view taken along the line - in FIG. 4, respectively, of the stock solution supply plate attached to the filter cloth of the filter press. 1, 3...front, rear stand, 2...main board,
4... Side beam, 5... Filter plate, 5a... Frame, 5b... Space, 5c... Inclined surface, 5d... Filtrate collection port, 5f... Handle, 6... Connecting link, 7
...Movable plate, 9...Hoisting shaft, 13...Motor, 1
4...Bevel gear transmission mechanism, 16...Filter cloth, 16a...
...Standard solution supply port, 18... Filter cloth hanging rod, 19... Fixture, 20... Cylindrical member, 21, 22, 23... First, second, third drive pulley, 24, 25, 26...
...first, second, and third wires, 27, 28...first and second filter cloth rewinding rollers, 29...washing water avoidance plate,
30... Spring device for filter cloth rewinding, 31... Filter cloth winding device, 32... Filter cloth rewinding device, 33... Filter chamber,
34...Stock solution supply plate, 34b...Protrusion, 34d,
34e...Through hole, 35...Connecting rod, 36...Auxiliary wire, 42...Cleaning pipe, 43...Cleaning nozzle.

Claims (1)

[Claims] 1. A pair of filter cloths 16, 1 between adjacent filter plates 5, 5
A filter cloth winding device 31 for suspending and supporting the pair of filter cloths 16, 16 is disposed above the filter plate 5, and a filter cloth winding device 31 for suspending and supporting the pair of filter cloths 16, 16 is disposed above the filter plate 5. The device 32 is disposed below the filter plate 5, and the filter cloth rewinding device 32 rewinds the pair of filter cloths 16, 16 below the filter plate, while the filter cloth winding device 31 rewinds the pair of filter cloths 16. ,1
6 to a predetermined position between the adjacent filter plates 5, 5, the filter cloth unwinding device 32 adjusts the unwinding speed of the pair of filter cloths 16, 16 to each other when unwinding the filter cloths. A filter press characterized by being configured to be different. 2 The filter cloth rewinding device 32 has the adjacent filter plate 5,
A pair of filter cloth unwinding shafts 27 and 28 are provided, each of which has a pair of filter cloth unwinding shafts 27 and 28 connected to the lower ends of the pair of filter cloths 16 and 16, respectively, and having different filter cloth unwinding shaft diameters.
The filter press according to claim 1, wherein the pair of filter cloths 16, 16 are rewound by rotation of the filter cloths 7, 28 in the filter cloth unwinding direction. 3 The filter cloth winding device 31, when winding up the filter cloth,
The filter press according to claim 1 or 2, wherein the pair of filter cloths 16, 16 are integrally and simultaneously rolled up to the predetermined position. 4 The filter cloth winding device 31 includes a filter cloth positioning drive pulley 21 and a pair of filter cloth winding drive pulleys 22, 23, each having a different diameter, and a winding device for rotating these drive pulleys 21, 22, 23. and an upper shaft 9, the drive pulley 2 for positioning the filter cloth.
The diameter dimension of 1 is the largest among the drive pulleys 21, 22, 23, and the drive pulley 21 for filter cloth positioning has an upper part of the pair of filter cloths 16, 16 between the adjacent filter plates 5, 5. are connected to each other via a string-like member 24 so that both filter cloths 16, 16 are simultaneously wound up, and the pair of filter cloth winding drive pulleys 2
The drive pulley 22, which has a larger diameter among the filter plates 5 and 23, is provided with the pair of filter cloths 1 between the adjacent filter plates 5 and 5.
The upper part of one of the filter cloths 16 connected to the filter cloth rewinding shaft 27 having a larger filter cloth rewinding shaft diameter is connected via a string-like member 25, and the pair of filter cloth winding drives Among the pulleys 22 and 23, the drive pulley 23 having a smaller diameter has the adjacent filter plate 5,
5, the upper part of the other filter cloth 16 connected to the filter cloth unwinding shaft 28 having the smaller diameter of the filter cloth unwinding shaft is connected via a string member 26. The filter press according to claim 2. 5 Each filter plate 5 is constituted by a frame 5a having a space 5b penetrating in the thickness direction of the filter plate, and the pair of filter cloths 16, 16 sandwiching each filter plate 5 are The spaces 5b are arranged on both sides of each frame 5a in the thickness direction and formed inside the frame 5a.
5. The filter press according to claim 1, wherein the winding and unwinding operations of each of the filter cloths 16 are performed outside of each of the filter plates. 6. Each of the pair of filter cloths 16, 16 between the adjacent filter plates 5, 5 is provided with a stock solution supply port 16a,
In addition, a stock solution supply plate 34 having through holes 34d and 34e communicating with the stock solution supply port 16a is provided on the periphery of the stock solution supply port 16a, so that the stock solution supply port 16a of each filter cloth 16 can be connected to the stock solution supply port 16a of each filter cloth 16 when the filter plate is tightened. The through holes 34d and 34e of each stock solution supply plate 34 form a communication pipe for stock solution supply, and the stock solution supply plate 3 faces each other between a pair of filter cloths 16, 16 between adjacent filter plates 5, 5.
4 has protrusions 34b on each surface of the filter plate, and when the filter plate is tightened, the protrusions 34b come into contact with the opposing stock solution supply plate 34, thereby creating a space between the stock solution supply plates 34, 34 that communicates with the communication pipe. A filter press according to claim 5, which is adapted to form a filter press. 7 Each of the above filter plates is composed of a filter bed and a frame surrounding the filter bed, and the pair of filter cloths sandwiching the filter plate are arranged on both sides in the thickness direction of each frame of each filter plate. Claims 1 to 4 sandwiching the filter bed
The filter press described in any of the paragraphs.