JP2007029926A - Filter dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter dryer capable of sufficiently upgrading a workability. <P>SOLUTION: A filter dryer excellent in maintainability is provided by making a fixing means among the filter dryer which measures a hydraulic pressure of pipes connected to the upper chamber of a hydraulic cylinder, a tank main body and a lower cover, a means for fixing a filter plate to the lower cover and a component of the filter plate as desired. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a filter dryer.

Conventionally, as shown in FIG. 4, the filtration dryer usually includes a tank body 1x having an opening at the bottom and a lower lid 8x that closes the opening from below, and a stirring blade is provided in the tank. The raw material slurry is filtered by a filtration part 60x formed on the upper surface side of the lower lid 8x, and is deposited as a cake above the filtration part 60x, and is processed into a powder product through steps of spreading, washing, drying and discharging. The filter 60x is conventionally constituted by a filter plate 10x in which a filter medium 11x is arranged on the upper surface and integrated in a plate shape. In the filter plate 10x, the filter medium 11x is usually laminated and integrated on a metal plate having a large number of holes. The filter 60x is formed by fixing the filter plate 10x on the lower lid 8x with a large number of screws 50x and fixing it to the upper surface side of the lower lid 8x. The lower lid 8x closes the opening from below by being fixed to the tank body 1x with a clamp 40x or the like.
Further, in the filter dryer, the tank wall usually has a jacket structure portion 14x in order to heat the slurry, cake or powder. In such a filter dryer, the lower lid 8x is fastened with a clamp 40x in order to seal the tank body 1x. However, the clamp 40x is heavy and large so that the work efficiency at the time of attachment and removal is lowered.

  For this filter dryer, there has been a conventional request to increase its operation work efficiency. For example, a filter dryer equipped with a stirring blade that can be rotated by a motor and can be moved up and down by a hydraulic cylinder in a tank body. In order to ensure efficient operation in each process such as filtration, spreading, washing, drying, and discharging, the stirring blades are moved up and down at high speed in the space inside the tank body where there is no cake, while in the spreading and drying processes, etc. The operator visually observes the inside from the viewing window provided on the main body, and after the operator adjusts the position of the stirring blade by operating the switch to the position where the stirring blade contacts the cake, the rotation direction and rotation of the stirring blade The speed was switched. However, since the conventional means is based on manual operation by an operator, a series of operations is very complicated, and in recent years, development of a filter dryer capable of automatically operating all processes has been requested. Yes.

On the other hand, in Patent Document 1, the upper chamber of the hydraulic cylinder for lowering the agitating blade and the lower chamber of the hydraulic cylinder for raising the agitating blade are connected to the lower chamber among the pipes respectively connected from the hydraulic unit. It is described that it is possible to detect that the stirring blade has contacted the cake by measuring the hydraulic pressure of the pipe.
However, in the conventional filter dryer, since the contact between the cake and the stirring blade is detected by measuring the hydraulic pressure of the pipe connected to the lower chamber of the hydraulic cylinder, the sensitivity is not sufficient, for example, A soft cake has a problem that it is difficult to sufficiently detect the contact.

Also, with this filter dryer, for example, when changing the type of powder to be filtered and dried, after all the previous powder is discharged, cleaning such as opening the lower lid and washing the inside is performed. It is done.
Therefore, work for adjusting the position of the agitating blade described above, that is, workability for maintenance work such as cleaning when switching materials as well as workability during operation is also demanded.
However, as described above, in the conventional filter dryer, the lower lid is fastened to the tank body using a clamp. Therefore, the heavy weight is heavy and the large-sized clamp is removed, the lower lid is opened and the cleaning is performed. After the cleaning is completed, the clamp must be attached again, and the workability when cleaning is lowered.

Further, as described above, since the filtering part is formed by screwing the filter plate to the lower lid, the filter plate is attached to the lower lid in order to clean the bottom surface side of the filter plate. All screws must be removed. Moreover, after completion | finish of cleaning operation | work, it is necessary to implement screwing of a filter plate again, and much effort is required for cleaning operation | work.
Furthermore, since the filter section is usually composed of a filter plate made of a metal perforated plate and formed integrally with a filter medium or the like, a heavy filter plate is handled during cleaning work. The work requires a lot of work. In addition, filter cloth and sintered wire mesh are used as the filter medium. When a sintered wire mesh is used, the metal perforated plate and the sintered wire mesh are usually welded. It has the disadvantage that the location is limited.
Therefore, from these facts, the conventional filter dryer is not sufficiently improved in workability of maintenance work such as cleaning.

  As described above, in the conventional filter dryer, it is difficult to accurately detect the cake surface, so it is difficult to sufficiently improve the operation efficiency, and the workability for maintenance is sufficiently improved. Not. That is, the conventional filter dryer has a problem that it is difficult to sufficiently improve the workability.

Japanese Patent No. 3066299

  In view of the above-described conventional problems, an object of the present invention is to provide a filter dryer that can sufficiently improve workability.

  As a result of intensive studies on improving the workability of the filter dryer, the present inventors have determined that the hydraulic pressure of the pipe connected to the upper chamber is higher than that of the pipe connected to the lower chamber of the hydraulic cylinder. It was found that the contact between the cake and the stirring blade can be grasped more accurately by measuring. In addition, the present inventors maintain the filter dryer by making the means for fixing the tank body and the lower lid in the filter dryer, the means for fixing the filter plate to the lower lid, and the configuration of the filtration part desired. As a result, the present invention was completed.

  That is, in order to solve the above-mentioned problem, the invention according to claim 1 relating to the filtration dryer of the present invention is characterized in that the tank body 1 is internally provided with a stirring blade 6 that can be rotated by a driving means and can be moved up and down by a hydraulic cylinder 3. The hydraulic path through which the hydraulic oil of the hydraulic cylinder 3 flows is the upper chamber A of the hydraulic cylinder 3 that lowers the stirring blade 6 and the lower side of the hydraulic cylinder 3 that raises the stirring blade 6. In order to detect the pipes 16, 17 connected to the chamber B, the hydraulic unit 18 connected to the other end of the pipes 16, 17, and the cake 20 accumulated in the tank body 1, the stirring blade 6 The pressure measuring device 19 provided in the pipe 16 to which the upper chamber A is connected and the driving means are controlled so that the reaction force received by the stirring blade 6 from the cake 20 when the cake 20 is contacted can be detected. Rotation control means C, The pressure measuring device 19 detects an increase in the pressure of the hydraulic oil in the pipe 16, and when the pressure rises above a preset value, the supply amount of the hydraulic oil from the hydraulic unit 18 to the upper chamber A of the hydraulic cylinder 3 The rotation control means C controls at least the rotation direction or the rotation speed by a detection signal from the pressure measuring device 19.

  Moreover, the invention according to claim 2 relating to the filter dryer uses a filter plate 10 in which a filter medium 11 having a planar shape is arranged on the upper surface portion and formed into a plate shape so as to allow liquid to pass through in the thickness direction. The filtration part 60 is formed at the bottom of the tank body 1, and the material to be filtered introduced into the tank body 1 is filtered by the filter medium 11, and the filtrate is passed to the lower surface side of the filtration part 60. The filtration dryer 60 is configured to be separable into a lower surface side and an upper surface side.

Further, according to the third aspect of the present invention relating to the filter dryer, the filter plate 10 having a planar shape on which the filter medium 11 having a planar shape is arranged and having a plate shape so as to allow liquid to pass through in the thickness direction is provided. A filtration dryer that is arranged at the bottom of the tank body 1 and is configured such that the material to be filtered introduced into the tank body 1 is filtered by the filter plate 10 and the filtrate is passed to the lower surface side of the filter plate 10. The tank body 1 has an opening at the bottom, and a lower lid 8 that closes the opening from below is used. By closing the lower lid 8, the filter plate 10 is lowered. The tank body 1 is formed with an abutting portion 1 a that contacts the upper surface side of the filter plate 10 so as to be sandwiched between the lid 8 and the tank body 1 and fixed on the upper surface side of the lower lid 8. It is characterized by.
According to a fourth aspect of the present invention, the contact portion is formed on the inner peripheral edge of the opening by projecting the inner peripheral edge of the opening toward the center of the opening. It is characterized by that.

  The invention according to claim 5 relating to the filter dryer includes a tank body 1 in which a flange portion is formed on the outer periphery of the lower end portion and an opening is formed in the bottom, and a lower lid 8 that closes the opening from below. The lower lid 8 is screwed to the flange portion of the tank body 1 so that the opening is closed, and the lower lid 8 has a flange portion of the tank body 1 at the periphery. A screwing portion that can be screwed is formed.

  According to the first aspect of the present invention relating to the filter dryer, it is possible to more accurately detect the contact between the cake and the stirring blade, and it is difficult to detect the contact between the cake and the stirring blade. Even with a soft cake or the like, contact with the stirring blade can be detected, and manual labor can be reduced. Therefore, the workability of the filter dryer can be improved.

  According to the invention described in claim 2 related to the filtration dryer, since the filtration unit is configured to be separable into the lower surface side and the upper surface side, the weight of the filtration unit is dispersed on the lower surface side and the upper surface side. Therefore, the workability can be improved as compared with the conventional integrated filtration unit. Moreover, the lower surface side can be constituted by a support member such as a resin mesh instead of the conventional metal porous plate, and the weight of the filtration part can be reduced. Furthermore, by making the lower surface side of the filter medium separable, it becomes easy to wash the filter medium from the lower surface side. Therefore, the maintenance work can be improved, and the workability of the filter dryer can be improved.

According to invention of Claim 3 which concerns on a filter dryer, it is attached to a tank main body so that a filter plate can be pinched | interposed by a lower cover and a tank main body by closing a lower cover, and it can fix on a lower cover upper surface side. Since the abutting portion that abuts on the upper surface side of the filter plate is formed, the filter plate can be clamped and fixed between the lower lid and the tank body on the upper surface side of the lower lid by closing the lower lid. Therefore, the trouble for screwing the filter plate to the lower lid can be reduced. That is, the maintenance work can be improved, and the workability of the filter dryer can be improved.
Furthermore, according to invention of Claim 4, since the inner peripheral part of the opening part of a tank main body protrudes in the opening part center direction, the contact part is formed in the inner peripheral part of the opening part. Further, it is not necessary to sandwich the filter plate other than the peripheral portion, and the filtration can be carried out using substantially the entire surface excluding the peripheral portion of the filter plate. And it can suppress that the structure of a tank main body becomes complicated.

  According to the fifth aspect of the present invention, the flange is formed on the outer periphery of the lower end of the tank body having an opening formed at the bottom, and the lower lid is screwed to the flange of the tank body. In order to close the opening portion, a screwing portion that can be screwed to the flange portion of the tank body is formed at the peripheral edge portion of the lower lid, so that fixing by a clamp can be omitted. That is, when cleaning, it is not necessary to remove and attach a clamp that is heavy and heavy, and the lower lid can be opened and closed by tightening and tightening a screw that is easier to handle than the clamp. Accordingly, the filter dryer can improve maintenance work such as cleaning, and can improve the workability of the filter dryer.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a bell-shaped housing body, which has a rotating shaft 4 that is driven to rotate by a motor 2 and can be moved up and down by a hydraulic cylinder 3 at the center of the tank, and is provided at the lower end of the rotating shaft 4. A stirring blade 6 composed of a plurality of blades 5 is internally provided. The hydraulic cylinder 3 is of a double-acting piston type, and its rod 7 is connected to the rotating shaft 4 of the stirring blade 6 as shown in FIG.

In FIG. 2, reference numeral 15 denotes a hydraulic path through which hydraulic oil of the hydraulic cylinder 3 flows. The hydraulic path 15 is connected to pipes 16 and 17 connected to the upper chamber A and the lower chamber B of the hydraulic cylinder 3, and the pipe 16 , 17, and a pressure measuring device 19 provided in the pipe 16. The pressure measuring device 19 detects an increase in the pressure of the hydraulic oil in the pipe 16 in advance. When the pressure rises above a set value, the supply amount of hydraulic oil from the hydraulic unit 18 to the upper chamber A of the hydraulic cylinder 3 can be reduced or stopped to a certain amount. At this time, the signal from the pressure measuring device 19 is detected by the programmable controller every 0.5 seconds, for example, and the pressure fluctuation noise is removed using the average value of the previous five detected values to accurately detect the cake surface. Detection can be performed.
By using a high-sensitivity sensor for the pressure measuring device 19, the cake surface can be detected more accurately.

  8 is a lower lid for closing the lower opening of the tank body 1, a filtrate outlet 9 is provided at the center thereof, and a filter plate 10 is disposed on the lower lid 8, so that a filtration unit 60 is provided. Is formed.

The filtration unit 60 includes a filter plate 10 and a resin mesh 22 as a support member, and is configured to be separable from the filter plate 10 on the upper surface side and the support member on the lower surface side. As shown in FIG. 3, the filter plate 10 has a peripheral portion 10a and a central portion 10b, and a filter medium 11 made of a sintered wire mesh is disposed in the central portion 10b. Moreover, the peripheral part 10a of the said filter plate 10 is formed with a metal, and the said filter medium 11 is welded to this peripheral part 10a. A resin mesh 22 is used as a support member for the filter medium 11 on the lower surface side of the filter medium 11.
Such a filter plate 10 can be reduced in weight to, for example, one-third or less of a conventional filter plate in which a metal porous plate is welded and integrated to the lower surface side of the filter medium 11. Moreover, the sintered wire mesh and the metal perforated plate are not welded, the sintered wire mesh that is the filter medium 11 and the peripheral portion 10a are welded, and the lower surface side of the filter medium 11 is simply provided with a resin mesh 22 on the lower surface. Since the resin mesh 22 on the side is separable, it can be cleaned from the back side of the sintered wire mesh, and the cleaning property is good.
Moreover, when using a filter cloth as a filter medium instead of the sintered wire mesh, for example, a thin plate such as punching metal is disposed in the central portion 10b of the filter plate 10, and the outer peripheral end of the thin plate and the filter plate 10 The thin plate can be held by engaging with the peripheral edge portion 10a, the resin mesh 22 can be arranged on the lower surface side of the held thin plate, and the filter cloth can be laminated on the thin plate.

Further, by closing the lower lid 8, the tank body 1 has a lower end opening so that the filter plate 10 is sandwiched between the lower lid 8 and the tank body 1 and fixed on the upper surface side of the lower lid 8. An abutting portion 1 a that abuts on the upper surface side of the filter plate 10 is formed by protruding the inner peripheral edge portion toward the center of the opening.
Further, the filter plate 10 is fixed by closing the lower lid 8 by using a screw 30 to connect a main body flange 1b formed on the outer periphery of the lower end of the tank main body 1 and a screwing portion 8a formed on the peripheral edge of the lower lid 8 with a screw 30. It is done to fix. That is, by this screwing, the lower end opening of the tank body 1 is closed from below with the lower lid 8, and the filter plate 10 on the lower lid 8 has its peripheral edge 10 a connected to the inner peripheral edge (contact part 1 a of the tank main body). ) And is fixed on the lower lid 8.

  A powder discharge device 12 is provided on the lower side surface of the tank body 1 and has a valve body (not shown) opened and closed by a hydraulic cylinder 13. Reference numeral 14 denotes a jacket structure provided on the outer peripheral surface of the tank body 1.

  This embodiment is configured as described above, and the raw material slurry charged into the tank body 1 is filtered by pressurizing the inside of the tank body 1, and the filtrate produced at that time passes through the filter plate 10. While being discharged to the outside from the filtrate outlet 9 of the lower lid 8, the solid content (cake 20) in the raw material slurry remains in the tank body 1 in a wet state.

  Next, in order to spread the cake 20, the stirring blade 6 is rotated by the motor 2 while being lowered by the hydraulic cylinder 3, but the blade plate 5 of the stirring blade 6 is located in the space 21 where the cake 20 does not exist. At this time, a large amount of hydraulic oil is supplied from the hydraulic unit 18 to the upper chamber A of the hydraulic cylinder 3 via the pipe 16 in order to lower the stirring blade 6 at a high speed, so that work efficiency is improved. The same applies to the case where the stirring blade 6 is raised.

  Thereafter, when the stirring blade 6 descends and contacts the upper surface of the cake 20, the stirring blade 6 receives a reaction force from the cake 20, and the pressure of the hydraulic oil in the pipe 16 increases. In this case, when the pressure rise of the hydraulic oil becomes larger than the set value, the pressure measuring device 19 detects this pressure rise and is fed from the hydraulic unit 18 to the upper chamber A of the hydraulic cylinder 3 in conjunction with this. The supply amount of hydraulic oil to be reduced to a certain amount or stopped, the descending speed of the stirring blade 6 is reduced or stopped, and then the rotation direction and the rotation speed are switched by the rotation control means C of the stirring blade 6. It is done. As the rotation control means C, for example, a control means such as a programmable controller can be employed. When switching the rotation direction and rotation speed by the rotation control unit C, the switching of the stirring blade 6 is linked to the rotation control unit C that controls the rotation of the stirring blade 6 by a detection signal from the pressure measuring device 19. This is performed by the motor 2. In this way, the rotational direction, rotational speed, and descending speed of the stirring blade 6 are appropriate for the spreading process.

  When the position of the cake surface is detected in this way, the stirring blade 6 is operated by switching to an ascending / descending speed, rotation direction, and rotation speed appropriate for the next process.

  When such a spreading process is completed, a washing jacket is sprayed on the spread cake 20 to remove foreign substances contained in the cake 20, and the heating jacket is decompressed in the tank body 1 after the washing process. In the drying process in which the heating medium is introduced into the drying process 14 and the stirring blade 6 is rotated, the stirring blade 6 is moved up and down to promote cleaning and drying. In each of these processes, the lifting speed of the stirring blade 6 is the same as that described above. Control is performed in the same manner as in the spreading process.

And the powder after drying is discharged | emitted from the tank main body 1 using the powder discharge apparatus 12. FIG.
The operation of cleaning the inside of the tank body 1 after discharging the powder is performed by removing the screws 30 that are screwed to the screw fixing portions 8a of the lower lid 8 and the flange portions 1b of the tank main body 1 to position the lower lid. This is done by moving it downward.

  At this time, the lower lid 8 is fixed to the tank body 1 by screwing using the flange portion 1b of the tank body 1 and the screwing portion 8a of the lower lid 8 instead of the conventional clamp. Therefore, it is not necessary to remove or attach a clamp having a large weight and a large size, and the lower lid can be opened and closed by tightening or loosening a screw that is easier to handle than the clamp. Accordingly, the filter dryer can improve maintenance work such as cleaning, and can improve the workability of the filter dryer.

  Further, conventionally, the clamp is fixed at a position where the jacket structure is not formed by extending the tank wall to a position where the jacket structure is not required, that is, a position lower than the filter plate. Therefore, when cleaning the inside of the tank, there is a possibility that the space between the lower end of the tank body 1 and the lower lid 8 is narrowed by the extension of the tank wall, thereby reducing workability. Since the lower lid 8 is fixed to the tank body 1 not by a conventional clamp but by screwing the flange portion 1b of the tank body 1 and the screwing portion 8a of the lower lid 8, There is no need to extend the wall downward, and the space between the lower end of the tank body 1 and the lower lid 8 can be made wider than before, and the workability such as cleaning work inside the filter dryer may be reduced. Can be suppressed.

  Further, when opening the lower lid 8, the lower lid 8 fixes the filter plate 10 that is abutted against the abutting portion 1 a formed at the lower end opening of the tank body 1 and is fixed on the lower lid 8. Is released. Therefore, as in the past, the filter plate 10 can be removed from the lower lid 8 without removing a large number of screws, and the filter medium 11 and the like can be easily cleaned.

Moreover, since the filter plate 10 is lighter than the conventional one, it is easy to handle.
As a result, the workability of a series of filter dryers can be improved.

  In the above embodiment, the pressure measuring device 19 as a detecting means is provided in the hydraulic path 15 of the hydraulic cylinder 3, but the detecting means is not limited to this. For example, the rod 7 and the rotating shaft of the hydraulic cylinder 3 are not limited thereto. A pressure element may be attached between the pressure element 4 and the detection element, and the ascending / descending speed of the stirring blade 6 may be controlled by a control means such as the hydraulic unit 18 in conjunction with the pressure element. In short, it is only necessary to be a detecting means capable of detecting the reaction force received by the stirring blade 6 from the cake 20 when the stirring blade 6 contacts the cake 20.

  Further, in the present embodiment, the cake 20 is detected and the hydraulic unit 18 as the lifting control means and the rotation control means C are configured so that the lifting and lowering speed, the lifting speed, the rotation direction, and the rotation speed of the stirring blade 6 can be changed. There is no need to change up and down and rotation, and it is sufficient that at least one of up and down, up and down speed, rotation direction or rotation speed can be changed. Further, the control means for the raising and lowering and rotating operation of the stirring blade 6 may be installed separately as shown in FIG. 2, or may be installed integrally. In short, it is only necessary to control elevation and rotation.

  Furthermore, the drive means that can rotate and lift the stirring blade 6 is not limited to the motor 2 and the hydraulic cylinder 3 of the above embodiment.

  As described above, the present invention detects the reaction force received by the stirring blade from the cake when the stirring blade comes into contact with the cake, so that the cake can be detected reliably and accurately. For example, it is possible to switch the agitating blade up / down, up / down speed, rotation direction, rotation speed, etc. to operating conditions corresponding to each step by a control means linked to the detection means.

Therefore, it is not necessary for the operator to change the raising / lowering speed, elevating speed, rotation direction, rotation speed, etc. of the stirring blade by manual operation each time, so that the work efficiency can be improved and all processes from filtration, spreading to discharging are performed. It is also easy to automate.
In addition, since the entire configuration of the detection device according to the present invention is extremely simple as described above, there is also a practical effect that it can be manufactured easily and inexpensively.

  In addition, the structure of each part of the filtration and drying apparatus such as the tank body 1 and the stirring blade 6 can be arbitrarily changed within the range intended by the present invention.

  For example, in the present embodiment, the case where a resin mesh is used as the support member in terms of being excellent in weight reduction of the filtration portion has been described as an example. However, in the present invention, the support member is not limited to the resin mesh, and metal It is also possible to use something like a mesh made. Furthermore, it is also within the scope of the present invention to use other members so that the filtration part can be separated into the upper surface side and the lower surface side.

The partial cross section front view of the filter dryer which shows one Embodiment of this invention. Explanatory drawing which shows an example of the cake surface detection apparatus of a filtration dryer. The principal part expanded sectional view of the filter dryer of one Embodiment. The principal part expanded sectional view of the filter dryer which shows a prior art example.

Explanation of symbols

1: tank body, 1a: contact part, 3: hydraulic cylinder, 6: stirring blade, 8: lower lid, 8a: screwing part, 10: filter plate, 11: filter medium, 14: jacket structure part, 20: cake 22: Resin mesh, 30: Screw, 60: Filtration part

Claims (5)

A filtration dryer in which a tank body (1) is equipped with a stirring blade (6) that can be rotated by a driving means and can be moved up and down by a hydraulic cylinder (3),
The hydraulic path through which the hydraulic oil in the hydraulic cylinder (3) flows is an upper chamber (A) for lowering the stirring blade (6) and the hydraulic cylinder (3) for raising the stirring blade (6). ) (16), (17) connected to the lower chamber (B), a hydraulic unit (18) connected to the other end of the pipes (16), (17), and a tank body ( 1) When the stirring blade (6) comes into contact with the cake (20) to detect the cake (20) accumulated in the inside, the reaction force received by the stirring blade (6) from the cake (20) can be detected. The pressure measuring device (19) provided in the pipe (16) to which the upper chamber (A) is connected, and the rotation control means (C) for controlling the driving means are provided, and the pressure measuring device ( 19) When the pressure of hydraulic oil in the pipe (16) is detected and the pressure rises above a preset value Decreases or stops the amount of hydraulic oil supplied from the hydraulic unit (18) to the upper chamber (A) of the hydraulic cylinder (3) to a certain level, and rotates in response to a detection signal from the pressure measuring device (19). The filter dryer, wherein the control means (C) controls at least the rotational direction or rotational speed. A filter part (60) formed by using a filter plate (10) formed in a plate shape so that a filter medium (11) having a planar shape is disposed on the upper surface part and allows liquid to pass through in the thickness direction is provided in the tank body (1 ) An object to be filtered formed in the bottom and introduced into the tank body (1) is filtered by the filter medium (11), and the filtrate is passed through the lower surface side of the filter (60). A filter dryer,
The filter dryer (60) is configured to be separable into a lower surface side and an upper surface side. A filter plate (10) having a planar shape is disposed on the upper surface portion, and a filter plate (10) formed in a plate shape so as to allow liquid to pass through in the thickness direction is disposed on the bottom of the tank body (1). 1) a filter drier configured so that the material to be filtered introduced into 1) is filtered by the filter plate (10) and the filtrate is passed to the lower surface side of the filter plate (10);
The tank body (1) has an opening at the bottom, and a lower lid (8) for closing the opening from below is used. By closing the lower lid (8), the filter plate ( 10) is held between the lower lid (8) and the tank body (1) and fixed on the upper surface side of the lower lid (8), the tank body (1) has an upper surface of the filter plate (10). The filtration dryer characterized by the contact part (1a) contact | abutted to the side being formed.   The filtration dryer according to claim 3, wherein the contact portion (1a) is formed on the inner peripheral edge of the opening by causing the inner peripheral edge of the opening to protrude in the center of the opening.   A tank body (1) having a flange (1b) formed on the outer periphery of the lower end and an opening formed on the bottom, and a lower lid (8) for closing the opening from below are used. A lid (8) is screwed to the flange portion (1b) of the tank body (1) to close the opening, so that the lower lid (8) has a peripheral portion of the tank body (1). A filter dryer having a screwing portion (8a) that can be screwed to the flange portion (1b).

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