JPH09168705A - Vacuum filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a device and its control by stationarily arranging both of a first section in which a material to be treated is sucked in vacuum and of a second section that alternates with the first section and is free from performance of suction in vacuum in a vacuum filter in which the material to be treated on filter cloth is stirred by a stirring device. SOLUTION: In the case of filtrating work, filter cloth is turned and moved by a moving device 4. In the horizontal part 1A of the filter cloth, firstly while the filter cloth is stopped in a section A, a material P to be treated is supplied on the filter cloth. Simultaneously, the vacuum shut-off valve 7 of suction pipe 10 connected to a vacuum tray 5 of the section A is opened and the material P to be treated on the filter cloth is sucked in vacuum to perform solid-liquid separation. Then, a vacuum release valve 8 is opened to release suction in vacuum. Thereafter, the material P to be treated is moved in a section B by traveling the filter cloth and stopping it and stirred by a stirring device 19 and action of a scraping up blade 28 and washed by washing liquid supplied from a washing pipe and thereafter arranged in the next section A and again sucked in vacuum and treated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum filtration apparatus mainly used in the fields of organic / inorganic chemistry, food and pharmaceutical industries, for filtering and washing a solid-liquid separated material to be treated from a mixture. .

[0002]

2. Description of the Related Art Conventionally, as this kind of vacuum filtration device,
For example, the one described in Japanese Patent Publication No. 5-69562 is known. In the vacuum filtration device described in this publication, the upper part of the endlessly wound filter cloth is allowed to continuously run horizontally at a constant speed,
Under the filter cloth, vacuum trays that form a dehydration area and plate-like bodies that are non-vacuum areas are alternately provided so as to be capable of reciprocating along the moving direction of the filter cloth. While the plate-like body moves as the filter cloth moves, suction filtration and dehydration of the object to be processed are performed by the vacuum tray, while the vacuum is released when the filter cloth moves in the opposite direction. Has been done. Then, on the filter cloth, within a range of movement of the plate-like body which is a non-vacuum region, a stirring device and a water supply device, in which a scraping tool is attached around a rotation shaft, are fixedly provided. In addition, it is also possible to provide the plate-like body in the non-vacuum region with a compressed air portion for supplying compressed air to the object to be processed through the filter cloth. Further, the dehydration zone is divided into a vacuum filtration section and a washing section.

[0003] In the vacuum filtration device configured as described above,
The object to be treated supplied onto the filter cloth is dehydrated to a certain degree by being vacuum-sucked in the vacuum filtration section in the first dehydration zone, gelled, and then washed in the washing section, and then the non-vacuum The area is subjected to a stirring operation by a stirring device, and if necessary, water is supplied from a water supply device and repulped. Then, the rate-controlling layer that increases the filtration resistance, which is formed in the object to be treated by the dehydration operation and is fixed, is destroyed by the stirring and water supply operations, and the inclusion water that has been taken into the porous structure of the object to be treated is Since it is in a state where it can be easily taken out to the outside, the second
By further washing and dehydrating the object to be processed in the dehydration region of the above, according to the vacuum filtration device having the above-mentioned configuration, even the object to be processed which contains the hardly filterable object or the substance having the porous structure is processed. Therefore, it is possible to obtain a high cleaning and dehydrating effect. Further, by providing the above-mentioned compressed air portion on the plate-like body and ejecting it onto the object to be treated simultaneously with the stirring operation, it is possible to further improve the stirring effect.

[0004]

However, in the vacuum filtration device having the above structure, the vacuum tray and the plate-like body are controlled to move at the same speed in accordance with the filter cloth continuously traveling at a constant speed. After that, and after the vacuum suction of the vacuum tray is released at the stroke end, these must be quickly returned to their original positions, which inevitably complicates the structure of the apparatus. Further, in the above vacuum filtration device,
A stirring device is fixedly provided for the object to be processed on the filter cloth that continuously runs, and the object to be processed is agitated by the scraping tool attached to the rotating shaft. You can pass by without stirring well,
There is a possibility that the washing and dehydrating effect may be non-uniform because the stirring state of the object to be treated may vary between the portion scraped by the scraping tool and the portion not scraped. Further, a large movement resistance of the object to be treated on the filter cloth continuously running always acts on the scraping tool and the rotating shaft, which may damage the stirring device.

The present invention has been made under such a background, and in a vacuum filtration device for agitating an object to be treated on a filter cloth by an agitator, the structure of the device is simplified, damage is prevented, and an object to be treated is treated. An object of the present invention is to provide a vacuum filtration device which has a high washing and dehydrating effect in combination with the repulping effect due to stirring by achieving uniform filtration and stirring of the material, and which is inexpensive.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems and to achieve the above object, the present invention is directed to a bottom of a filter cloth that can be intermittently run at a predetermined distance in a substantially horizontal direction. In addition, a first section in which the object to be treated supplied on the filter cloth is vacuum-sucked and a second section in which the vacuum suction is not performed are first and last in the running direction of the filter cloth. The sections are alternately provided in a fixed manner so that the width in the running direction is equal to the distance interval of the intermittent running of the filter cloth, and the second section is vacuum-sucked in the first section. The agitating device for agitating the object to be treated is provided in the second section so as to be capable of reciprocating along the running direction of the filter cloth and capable of being brought into contact with and separated from the filter cloth.

Therefore, according to the vacuum filtration device having such a configuration, the vacuum tray for vacuum-sucking the object to be processed in the first section, and the plate-shaped body (no vacuum) for which vacuum suction is not performed in the second section. It is not necessary to reciprocate with the tray), and while the filter cloth that runs intermittently is stopped, the first
It is possible to uniformly vacuum-dissolve the object to be processed in the section, and to stir the object to be processed in each section by the reciprocating stirring device in the second section. Further, when the filter cloth travels and the object to be processed moves, it is possible to prevent the movement resistance of the object to be processed from acting on the agitator by separating the agitator from the filter cloth.

Here, in order to more effectively agitate the object to be treated by the agitator, the agitator is embedded in the object to be treated on the filter cloth as the agitator comes in contact with the filter cloth. It is desirable to stir the object to be processed by supplying compressed air to the object to be processed from the agitation pipe to be processed, whereby the object to be processed is moved by the movement of the agitation pipe as the stirrer reciprocates. Is efficiently agitated, and compressed air is supplied directly into the object to be processed from this stirring pipe, which further promotes stirring of the object to be processed, and the drying capacity of the compressed air is Since the surface tension of is weakened, the dehydration effect can be further improved. Also, when such a configuration is adopted,
An agitating pipe is provided so as to cross the running direction of the filter cloth, and a scraping blade that tapers toward the moving direction is provided on the moving direction side of the agitating device in the object to be processed. In this case, the stirring pipe can more uniformly stir the object to be treated, and the scraping blade can further reduce the action of the resistance from the object to be treated due to the movement of the stirring device.

Further, since it is possible to avoid the movement resistance of the object to be processed from acting on the stirring device as described above, as the stirring device, a rotary shaft is provided so as to traverse the running direction of the filter cloth. Even if a scooping tool is provided on the outer circumference of the rotary shaft, damage to the stirring device can be suppressed, and moreover, it is possible to promote uniform stirring by reciprocating the stirring device.

On the other hand, if a plurality of the second sections are provided under the filter cloth and the agitator is provided in each of the second sections, the second section is provided along the running direction of the filter cloth. Alternating with 1 section, dehydration, stirring, dehydration, stirring,
By repeating such operations as dehydration, the cleaning and dehydrating effect can be further improved. When such a configuration is adopted, the agitator provided in each second section is integrally interlocked with each other so that the agitator can reciprocate along the traveling direction, thereby further simplifying the device structure. In addition to being able to achieve, it is possible to uniformly stir the object to be treated in each second section. Furthermore, if the above-mentioned stirring device is integrally provided with a cleaning device for supplying a cleaning liquid to the object to be processed on the filter cloth, this cleaning device can be reciprocated as the stirring device reciprocates. The cleaning liquid can be evenly and uniformly supplied to the cleaning liquid.

[0011]

1 to 3 show a first embodiment of the present invention.
FIG. In these drawings, reference numeral 1 denotes an endless belt-shaped filter cloth that is sequentially wound around a plurality of return rolls 3 provided on the base 2, and the filter cloth 1 is provided on the upper side of the base 2. The wound portion is arranged so as to extend in the horizontal direction, while the lower portion is provided with a moving device 4 for intermittently moving the filter cloth 1 so as to circulate clockwise in the drawing. As the filter cloth 1 goes around, the horizontal portion 1 of the upper portion of the filter cloth 1
A is intermittently run at a predetermined distance in the running direction indicated by reference sign F in the figure. Under the horizontal portion 1A of the filter cloth 1, three vacuum trays 5 ... And two non-vacuum trays 6 and 6 are provided toward the running direction F side of the filter cloth 1.
The vacuum trays 5 are provided at the beginning and at the end alternately, that is, the trays 5, 6, 5, 6, 5 are fixed to the base 2 in this order.

Here, each vacuum tray 5 is connected to a suction pipe 10 provided with a vacuum shutoff valve 7 and a vacuum release valve 8 and connected to a vacuum source 9. Further, the non-vacuum trays 6 are plate-like members whose upper surfaces are flush with the upper surfaces of the vacuum trays 5, and the width of the filter cloth 1 in the traveling direction F is set to be equal to the width of the vacuum trays 5. Has been done. Then, the three vacuum trays 5 form a first section A for performing vacuum suction of the object P to be processed on the filter cloth 1, and the two non-vacuum trays 6 arranged between these sections. A second section B ... Is formed without vacuum suction. Of the return rolls 3 ..., the return roll 3A around which the filter cloth 1 is wound on the side of the horizontal direction 1A of the filter cloth 1 in the running direction F has a workpiece P that has been washed and dehydrated. A knife 11 is provided for separating the filter cloth 1 from the filter cloth 1.

Further, the moving device 4 is provided with a carriage 13 which is capable of traveling on a rail 12 provided on the base 2 along the traveling direction in the lower portion of the filter cloth 1, and a filter cloth for the carriage 13. 1 is provided above and below, and a pair of sandwiching members 14A and 14B that are vertically arranged with a sandwiching cylinder (not shown) interposed therebetween to sandwich and sandwich the filter cloth 1 therebetween. The cylinder rod 1
One end of 5A is connected to the upper sandwiching member 14A, and is composed of a moving cylinder 15 that moves the carriage 13 together with the sandwiching members 14A and 14B along the traveling direction of the filter cloth 1, and the sandwiching members 14A and 14B are provided. By repeating the operation of moving the carriage 13 forward with the carriage 13 in the traveling direction while the filter cloth 1 is clamped, and then moving backward with respect to the traveling direction while the clamping is released, as described above. Is intermittently circulated, and the horizontal portion 1A of the upper part thereof is intermittently traveled in the traveling direction F at predetermined distance intervals. The distance at which the filter cloth 1 travels intermittently by the moving device 4 is set to be equal to the width of each of the vacuum tray 5 and the non-vacuum tray 6 in the traveling direction F.

A cleaning pipe 16 is attached to the other end of the cylinder rod 15A of the moving cylinder 15, and the lower part of the filter cloth 1 is interlocked with the movement of the carriage 13 and the holding members 14A and 14B. It is possible to move back and forth along the direction of travel. Further, a cleaning nozzle 16A is provided at the tip (right end in FIG. 1) of the cleaning pipe 16 so as to be located immediately above the filter cloth 1 running on the lower side of the base 2, and the cleaning pipe 16 is also provided. A cover 17 is provided in the moving range of the cleaning nozzle 16A as the cleaning nozzle 16A moves forward and backward, so as to cover the lower part of the running filter cloth 1 in the middle. The filter cloth 1 after the object P is peeled off by the knife 11 is cleaned while the cleaning liquid is jetted and the cover 17 prevents the scattering.

On the other hand, rails 18 are provided above the base 2 in parallel along the running direction F of the filter cloth 1, and the rails 18 are provided in the two second sections B, B, respectively. Correspondingly, a stirring device 19 for stirring the object P to be treated on the filter cloth 1,
19 are provided. As shown in FIGS. 2 and 3,
These agitating devices 19 and 19 are respectively attached to a body plate 21 provided on the rail 18 via wheels 20 so as to be able to travel along the rail 18 so as to be suspended from the body plate 21. A rectangular parallelepiped frame type bracket 23 is provided via 22. A plurality of (four in the present embodiment) agitation pipes 24 are provided on the lower surface of the bracket 23 in a direction perpendicular to the traveling direction of the filter cloth 1. In the second section B, the vacuum-free tray 6 is mounted in parallel with the upper surface of the vacuum-free tray 6 so as to cross the filter cloth 1 in the traveling direction F at intervals. Further, a compressed air supply source 27 is connected to one end of each of the stirring pipes 24 through a flexible hose 25 and a pressure adjusting valve 26, and each stirring pipe 24 has a large number of openings facing downward. The ejection holes 24A are formed at intervals.

Here, of the stirring pipes 24, ..., the traveling direction F side of the stirring pipe 24 provided on the most traveling direction F side (right side in FIG. 2) of the filter cloth 1 is the traveling direction F side. A plate-shaped scraping blade 28 having a right-angled triangular cross section whose upper surface is inclined downward is attached to the lower portion of the stirring pipe 24 so as to taper toward the bottom. In addition, on the upper lower surface of the bracket 23,
A plurality of cleaning pipes 29 are located horizontally above the object P to be processed on the filter cloth 1 and are perpendicular to the running direction F of the filter cloth 1 in the same manner as the stirring pipe 24, in the running direction F. The cleaning pipes 29 are mounted at intervals, and a cleaning liquid supply source 31 is connected to one end of each of the cleaning pipes 29 through a flexible hose 30, and each cleaning pipe 29 is opened downward. A large number of ejection holes 29A are formed at intervals to form the cleaning device 32 in the present embodiment. Further, cylindrical guide pipes 33 ... Are erected at the four corners of the upper surface of the bracket 23, while guide bars 34 that are inserted into the guide pipes 33 are provided on the lower surface of the body plate 21. , These guide pipes 33 ... And guide bars 34 ...
The bracket 23 is vertically moved with respect to the filter cloth 1 by being guided by the.

Furthermore, the upper portions of the two stirring devices 19 and 19 having such a structure are connected to a connecting bar 36 via a connecting bracket 35, and one end of the connecting bar 36 is provided with the filter cloth 1. The cylinder rod 3 of the moving cylinder 37 provided horizontally on the base 2 toward the rear side in the traveling direction F.
The tip of 7A is connected, and when the cylinder rod 37A of this moving cylinder 37 moves in and out, both stirring devices 1
9 and 19 are integrally interlocked via the connecting bar 36, and reciprocally move along the rail 18 in the second sections B and B, that is, along the traveling direction F of the filter cloth 1. It is done like this. Further, in the present embodiment, the stirring device 19 on the rear side (left side in FIG. 1) in the traveling direction F of the filter cloth 1 is provided with the inlet 38 for supplying the object P to be processed onto the filter cloth 1. Therefore, the moving cylinder 37
With the reciprocating movement of the agitating devices 19, 19, the inlet 38 also reciprocates along the traveling direction F of the filter cloth 1 to supply the object P to be treated onto the filter cloth 1.

In the thus constructed vacuum filtration device, as described above, the filter cloth 1 has the horizontal portion 1A on the upper side thereof at a predetermined distance interval according to the widths of the first and second sections A and B. The moving device 4 is configured so as to intermittently travel in the traveling direction F.
Thus, the orbiting movement is intermittently performed in the clockwise direction in FIG. Then, the horizontal portion 1A of the filter cloth 1
In the first, the first first on the rear side in the traveling direction F.
In the section A, while the filter cloth 1 is stopped, the inlet 38, which reciprocates in conjunction with the stirring devices 19 and 19 by the moving cylinder 37, moves in the traveling direction F on the first section A. While being moved toward, the object to be treated P is supplied and spread on the filter cloth 1 located on the first section A. At the same time, the vacuum tray 5 in the first section A
The vacuum shut-off valve 7 of the suction pipe 10 connected to is opened and the vacuum release valve 8 is closed, so that the object to be treated P supplied onto the filter cloth 1 is vacuum-sucked and solid-liquid separated. It The opening / closing operations of the vacuum shutoff valve 7 and the vacuum release valve 8 are simultaneously performed in the other two vacuum trays 5 and 5.

Next, by closing the vacuum shutoff valve 7 of the suction pipe 10 and opening the vacuum release valve 8, the vacuum tray 5 is opened to the atmospheric pressure and the vacuum suction is released. Thereafter, the moving device 4 causes the filter cloth 1 to run in the running direction F at a predetermined distance and then stop, so that the object P to be vacuum-sucked in the first section A is the next first one. Move to the second section B. While the filter cloth 1 is running, the stirring device 1 provided in the second sections B, B
9 and 19 are moved to a position on the rear side in the traveling direction F of each of the second sections B and B by the moving cylinder 37, and the bracket 23 thereof is pulled up by the pressing cylinder 22. It is designed so as not to interfere with the running of No. 1. In addition, during this time, the injection port 38 that has moved to the running direction F side on the first section A for the first time is provided with the stirring device 19 by the moving cylinder 37.
With the movement of 19 to the rear side in the traveling direction F, the first section A returns to the position on the rear side in the traveling direction F.

Then, for the object P to be treated on the filter cloth 1 which has moved to the second sections B, B, the first first
In parallel with the supply of the processing object P in the section A and the vacuum suction of the processing object P in each of the first sections A, the stirring operation of the processing object P by the stirring devices 19 is performed.
That is, first, the bracket 23 of the stirring device 19 located on the rear side in the traveling direction F of the second section B is lowered by the pressing cylinder 22, and the stirring pipes 24 and the scraping blade 28 at the lower end thereof are placed on the filter cloth 1. Of the stirring pipe 24, compressed air from the supply source 27 from the ejection holes 24A of the stirring pipes 24, and supply source 31 from the ejection holes 29A of the cleaning pipes 29 of the cleaning device 32. The cleaning liquids from are supplied to the objects to be processed P, respectively. Then
From this state, the main body plate 21 is moved by the moving cylinder 37.
As the object moves along the rail 18 toward the traveling direction F, the object to be processed P located on the second section B is supplied with the cleaning liquid from the cleaning device 32, and the scraping blade 2
8 is stirred up, and is further bubbled and stirred by the compressed air supplied from the stirring pipe 24 of the stirring device 19.

When the stirrer 19 moves in this way and reaches the running direction F side of the second section B, the pressing cylinder 22 is pressed.
As a result, the bracket 23 rises, and the stirring pipes 24 and the scraping blade 28 are pulled up from the object P to be processed. At this time, the objects to be treated P attached to the stirring pipes 24 and the scraping blades 28 are washed away by the cleaning liquid supplied from the cleaning pipes 29 and returned to the filter cloth 1. In accordance with this, the vacuum suction is released in each of the first sections A ... Then, the filter cloth 1 is further moved by the moving device 4 by a predetermined distance, and the agitated and washed objects in the second sections B, B are removed. The processed material P is the first section A, A next to it.
It is placed in and vacuum sucked again. Further, in parallel with this, the stirring devices 19 and 19 of the second sections B and B and the inlet 38 of the first section A of the first section are moved to the rear side in the traveling direction F by the moving cylinder 37, respectively. Return to the position. Therefore, by sequentially repeating such operations, the workpiece P supplied from the inlet 38 is vacuum suctioned, washed / stirred, vacuum sucked, washed / washed in the first and second sections A. The operations such as stirring and vacuum suction are alternately received, and then the edge of the horizontal portion 1A of the filter cloth 1 on the running direction F side is scraped off by the knife 11 and discharged.

As described above, according to the vacuum filtration device having the above-described structure, first, the vacuum trays 5 in the first section A in which the object P to be processed is vacuum-sucked, and the second part for cleaning and stirring the object P to be processed. , And the non-vacuum trays 6 of the section B are fixed, and there is no need to perform operations such as moving these in accordance with the traveling of the filter cloth 1 and rapidly returning to the original position as in the conventional case. Thus, the structure of the device can be simplified and its control can be facilitated. Further, the horizontal portion 1 of the filter cloth 1
A travels intermittently at a predetermined distance interval, and in the first section A, the vacuum trays 5 suck the object P to be processed in vacuum, and in between the second sections A are alternately arranged. In the section B ..., the object P to be treated is uniformly agitated and repulped entirely by the agitator 19 moving in the second section B, so that a part where the filtration and the agitation process are not uniform occurs. Can be prevented.

Further, in the vacuum filtration device having the above construction, the stirring device 19 is reciprocally movable in this way, and
The pressing cylinder 22 allows the filter cloth 1 to be brought into and out of contact with the filter cloth 1, and the stirring pipes 24 and the like of the stirring device 19 can be lifted from the object to be processed P while the filter cloth 1 is running. Therefore, it is possible to prevent a situation in which the stirring device 19 interferes with the object P to be processed on the running filter cloth 1 and the smooth running of the filter cloth 1 is hindered. On the other hand, since the movement resistance from the traveling object P does not act, it is possible to prevent the occurrence of damage due to the movement resistance. Therefore, according to the present embodiment, even though the structure is simple, the cost is relatively low, and the durability is high, it is possible to perform uniform filtering and stirring operations on the object to be processed. It becomes possible to provide a filtration device capable of performing efficient vacuum filtration by the repulp effect by the operation. Moreover, since the stirring device 19 that reciprocates is equipped with the cleaning device 32, the cleaning liquid can be evenly and uniformly supplied to the object to be processed P as in the stirring operation. The destruction of the rate-controlling layer of
The repulp effect can be improved.

Further, in this embodiment, the stirring device 19 is used.
While the stirring pipes 24 provided in the above are buried in the object P to be processed by the pressing cylinder 22, the stirring device 19 is moved, and compressed air is supplied from the stirring pipes 24, so that the stirring pipes 24 are provided. Due to the stirring effect and the foaming effect of the compressed air, it becomes possible to stir the object P more efficiently. In particular, the foaming effect of the compressed air is that the compressed air is jetted directly from the stirring pipes 24 embedded in the processed object P, instead of supplying the compressed air to the processed object through a filter cloth as in the conventional case. Further, the stirring efficiency can be further improved, and a high repulping effect can be obtained. Moreover, in the present embodiment, the stirring pipes 24 are provided so as to cross the traveling direction of the filter cloth 1, and the scraping blade 28 is provided on the traveling direction F side thereof, whereby the object P to be processed is provided. Is subjected to the bubbling and stirring action of the compressed air when it is scraped up by the scraping blade 28 to the upper side of the stirring pipes 24, so that more efficient stirring can be promoted. Further, it is possible to obtain an advantage that the scraping blade 28 can relatively reduce the resistance received from the workpiece P when the stirring device 19 moves.

Furthermore, in the present embodiment, the two second sections B and B are alternately arranged with the three first sections A ..., and the stirring devices provided in the respective second sections B and B are arranged. 19, 19 are connected by a connecting bar 36, and can be reciprocally moved integrally by a moving cylinder 37. Therefore, the object to be treated P, which has been supplied onto the filter cloth 1, vacuum-sucked, then washed and stirred, and then vacuum-sucked and once filtered, is washed and stirred again and vacuum-sucked to wash. While the dehydration efficiency can be further enhanced, the structure of the device can be prevented from becoming complicated, and the above-described effect of providing a low-cost device can be sufficiently maintained. Further, in the present embodiment, the movable operations such as the movement of the filter cloth 1, the reciprocating movement of the stirring device 19, and the raising and lowering of the bracket 23 of the stirring device 19 are all performed by the pressure devices such as the moving cylinders 15 and 37 and the pressing cylinder 22. ,
For example, since there are no moving parts such as motors that are driven by electric devices, these power sources should be integrated into a pressure supply source to further simplify the structure of the device and facilitate maintenance and inspection. You can

In the present embodiment, as described above, the filter cloth 1 is held by the holding members 14A and 14B of the moving device 4, and then the filter cloth 1 is moved by the moving cylinder 15 to run on the horizontal portion 1A thereof. Although it is made to travel intermittently in the direction F, as a means for running the filter cloth 1 similarly using a pressure device such as a cylinder, for example, the return roll 3A on the running direction F side of the horizontal portion 1A, The lower part of the filter cloth 1 on the traveling direction F side (left side in FIG. 1) can be moved back and forth horizontally by a moving cylinder, and an adjusting roll for preventing the slack of the filter cloth 1 is appropriately provided. When the return roll 3A or 3B advances, the vacuum suction is released and the filter cloth 1 is moved integrally, and while the return roll 3A or 3B is retracted, the vacuum suction is performed. Filter cloth is fed to the underside of the base 2 1
You may make it move by pulling. Furthermore, although the above-mentioned effect is impaired, for example, the above-mentioned return roll 3
The filter cloth 1 may be run by connecting A to a motor or the like and rotating and driving it intermittently.

Further, in this embodiment, the horizontal portion 1 of the filter cloth 1 is
On the rear side of the traveling direction F in A, the inlet 38 for supplying the object to be treated P onto the filter cloth 1 is the first second section B.
Is connected to a stirring device 19 provided in the moving cylinder 3
It is possible to reciprocate by interlocking with the two stirring devices 19, 19 by 7. However, by adopting such a configuration, the object P to be processed can be supplied onto the filter cloth 1 in a uniform thickness. On the contrary, if it becomes difficult, the inlet 38 may be separated from the agitator 19 and may be independently reciprocated by another moving cylinder or the like. Furthermore, the stirring device 19
Alternatively, while the filter cloth 1 is stopped, the object P may be reciprocated once or plural times in the second section B.

Next, FIGS. 4 and 5 show a stirring device 41 according to a second embodiment of the present invention.
Throughout the drawings, the same parts as those of the first embodiment shown in FIG. In the stirring device 41 of the second embodiment, the main body plate 2
In place of the stirring pipe 24 of the first embodiment, a rotary shaft 43 rotatably driven by a drive device 42 such as a motor is attached to a bracket 23 that is vertically movable through a pressing cylinder 22. 1 is horizontally provided so as to traverse the traveling direction F of 1, and a spiral screw blade 44 is formed on the rotating shaft 43. Here, this screw blade 4
4 constitutes a scraping tool in the present embodiment, and particularly in the present embodiment, a pair of blade portions 44A, 44 which bisect the axial length of the rotary shaft 43 and twist in opposite directions.
B.

However, even in the vacuum filtration device using such a stirring device 41, the bracket 23 is directed toward the filter fabric 1 by the pressing cylinder 22 of the stirring device 41 while the intermittently running filter fabric 1 is stopped. As a result, the screw blades 44 of the rotary shaft 43 are submerged in the object P to be processed arranged in the second section B. Then, the rotating shaft 43 is rotated by the driving device 42, the workpiece P is scraped up by the screw blades 44, and the stirring device 41 is moved by the moving cylinder 37, so that the rotating screw blades 44 move to the first position. In the section B of 2, the object P is agitated in the traveling direction F. Further, in the stirrer 41 that has moved to the end of the second section B on the traveling direction F side in this way, the screw blades 44 are pulled up from the workpiece P by the pressing cylinder 22, and then the filter cloth 1 is moved. In the meantime, it is returned to its original position by the moving cylinder 37. At least while the screw blades 44 are stirring the object P to be processed,
The cleaning liquid is ejected from the cleaning pipe 29 of the cleaning device 32,
While being supplied to the object P to be processed, the object P to be processed attached to the rotary shaft 43 and the screw blades 44 is washed away.

Therefore, also in the vacuum filtration device of the second embodiment, as described above, the stirring device 41 can be reciprocated along the traveling direction F of the filter cloth 1 and can be contacted with and separated from the filter cloth 1. By so doing, it is possible to uniformly and evenly stir the object P to be processed arranged in the second section B, and the movement resistance of the object P to be processed when the filter cloth 1 is moved is agitating device. It is possible to prevent the stirring device 41 from being damaged and the like by avoiding acting on 41. Of course, the structure of the apparatus can be simplified by providing the first section A in which the object P to be vacuum-sucked and the second section B in which the object P is agitated are fixed. .

Further, in the second embodiment,
Since the stirring device 41 directly scrapes up and stirs the object to be treated P by the screw blades 44 provided on the rotating shaft 43, the object P to be aggregated in a lump and the like can be It is possible to surely stir it by breaking it down and to sufficiently spread the cleaning liquid from the cleaning device 32. Moreover, in the present embodiment, the screw blade 44 is composed of a pair of blade portions 44A and 44B whose twist directions are opposite to each other,
Therefore, the object P is not biased toward one side of the rotating shaft 43 and is not agitated, and it is possible to promote more uniform agitation. In the present embodiment,
The screw blades 44 are thus paired with the pair of blade portions 44A,
44B, but these blades 44A, 4
You may make it provide multiple 4B.

Instead of using such screw blades 44, a flexible plate-like body is formed at the tips of a plurality of support plates 45 protruding from the rotary shaft 43 as shown in FIG. The scraping tool 46 is detachably attached, or as shown in FIG. 6B, a linear body or a linear elastic body 4 is spirally attached to the tip of a support 47 provided at an appropriate interval on the rotary shaft 43.
8 or the rotary shaft 43 as shown in FIG.
Alternatively, a plurality of scraping rods 49 may be provided radially along the axial length. Further, in the scraping bar 49, as shown in FIG. 6D, a plurality of protrusions 50 ... Are attached to the peripheral surface in a dot shape, a ring shape, or a spiral shape.
As shown in FIG. 6 (e), a scraping rod 51 is attached to the tip of the scraping rod 49, or as shown in FIG.
2 may be attached.

Further, instead of the screw blades 44, as shown in FIG. 6G, a spiral screw rod 54 is provided along the lengthwise direction of the rotary shaft 43 via a support rod 53. Or, as shown in FIG.
The plurality of scraping rods (plates) 55 held by the rotary shaft 4
3 may be provided in parallel with each other, or obliquely and superposed on each other, and a plurality of spiral screw rods 56 held by the support rod 53 may be provided as shown in FIG. They may be appropriately provided so as to overlap with each other and rotate in the same direction or different directions. Further, one stirring device 41 may be provided with a plurality of rotary shafts 43 provided with the above-mentioned scraping tool. In this case, each rotary shaft 43 is provided.
The scraping tools provided on the same may be of the same kind or different from each other.

On the other hand, in the above-described first embodiment, the stirring device 19 is provided in each of the two second sections B, B which are alternately provided between the three first sections A. However, one of the second sections B and B may be provided with the stirring device 19 of the first embodiment, and the other may be provided with the stirring device 41 of the second embodiment. Good. Further, in this way, the stirring device 1
The number of second sections B in which the object P is agitated by 9, 41 is not limited to two, and may be one or three or more depending on the properties of the object P, filtration conditions, and the like. You may.

[0035]

As described above, in the present invention, the first section in which the object to be processed is vacuumed and the second section in which the vacuum suction is not performed are alternately arranged. Therefore, it is not necessary to reciprocate the vacuum tray or the non-vacuum tray according to the running of the filter cloth, which simplifies the structure of the device and its control, while the intermittently running filter cloth is stopped. Further, since the vacuum suction is performed in the first section and the reciprocating stirrer is used in the second section to stir the object to be treated, these treatments are performed on the filter cloths located in the respective sections. It is possible to apply it uniformly to the processed material. Moreover, since this stirring device can be brought into and out of contact with the filter cloth, by moving the stirring device away from the filter cloth when the filter cloth travels, the movement resistance of the object to be treated on the filter cloth is agitated. It is possible to avoid such a situation that acts on and causes damage. Therefore, according to the present invention, it is possible to perform a high repulping operation and obtain a high washing and dewatering effect with a relatively inexpensive and highly durable filtration device.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged side sectional view of a second section B of the embodiment shown in FIG.

3 is an enlarged cross-sectional view of the second section B of the embodiment shown in FIG. 1 as seen from the running direction F side of the filter cloth 1. FIG.

FIG. 4 is an enlarged side sectional view of a second section B showing the second embodiment of the present invention.

5 is an enlarged cross-sectional view of the second section B of the embodiment shown in FIG. 4 as seen from the running direction F side of the filter cloth 1. FIG.

FIG. 6 shows a stirring device 4 according to a second embodiment of the present invention.
It is a figure which each shows the modification of 1 scraping tool.

[Explanation of symbols]

 1 Filter cloth 1A Horizontal part of filter cloth 1 Moving device 5 Vacuum tray 6 Non-vacuum tray 19,41 Stirring device 22 Pressing cylinder 24 Stirring pipe 28 Scraping blade 29 Washing pipe 32 Washing device 37 Moving cylinder 43 Rotating shaft 44 Screw blade (Scraping tool) P Object to be processed A First section B Second section F Running direction of the horizontal portion 1A of the filter cloth 1

Claims (6)

[Claims] 1. A first section for vacuum-sucking an object to be treated, which is supplied onto the filter cloth, under the filter cloth that can intermittently run at a predetermined distance in a substantially horizontal direction. The second section in which the vacuum suction is not performed is alternated so that the first section is the first section and the last section is the first section along the running direction of the filter cloth, and the width of each of the running directions is the same as that of the filter cloth. It is fixedly provided so as to be equal to the distance distance of the intermittent running, and in the second section, a stirring device for stirring the object to be vacuumed in the first section is provided. The vacuum filtration device is provided so as to be capable of reciprocating along the traveling direction of the filter cloth in the section of (1) and being capable of being brought into and out of contact with the filter cloth. 2. The stirrer is provided with a stirrer pipe which is embedded in the object to be treated on the filter cloth when the stirrer is separated from and in contact with the filter cloth. The vacuum filtration device according to claim 1, wherein the object to be processed is agitated by supplying compressed air to the object to be processed. 3. The stirring pipe is provided so as to cross the traveling direction of the filter cloth, and the stirring pipe has a moving direction side in the object to be processed of the stirring device. The vacuum filtration device according to claim 2, further comprising: a scraping blade that is tapered toward the end. 4. The stirring device is provided with a rotary shaft so as to cross the traveling direction of the filter cloth, and a scraping tool is provided on the outer periphery of the rotary shaft. The vacuum filtration device according to 1. 5. A plurality of the second sections are provided under the filter cloth, and the agitator is provided in each of the second sections, and the agitators are integrally formed. The vacuum filtration device according to any one of claims 1 to 4, wherein the vacuum filtration device is capable of reciprocating along the traveling direction in an interlocking manner. 6. The cleaning device for supplying a cleaning liquid to the object to be treated on the filter cloth is integrally provided in the stirring device, according to any one of claims 1 to 5. Vacuum filtration device.