Filtration drying method and filtration drying apparatus

Abstract

To provide a filtration drying method and a filtration drying apparatus, capable of shortening a time required from the start of a filtration step to the completion of a drying step.SOLUTION: A filtration drying method executed by using a filtration drying apparatus 10 includes: a filtration preparation step of preparing a material to be processed containing a solid and a liquid in a housing space S of a container 12; a filtration step of filtering the material to be processed through a filter part 18 provided in the container 12; a peeling step of detaching, in a stationary state, a solid W1 captured by the filter part 18 and adhering to an adhesion surface 142 including inner surfaces of the filter part 18 and the container 12, from the adhesion surface 142; and a drying step started after the start of the peeling step, in which the solid W1 peeled from the adhesion surface 142 is heated and dried while being stirred. The peeling step includes a step of heating and drying a contact region X in contact with the adhesion surface 142 on a surface of the solid W1.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a filtration and drying method and apparatus for filtering a material to be treated with a filter section and drying solid matter captured by the filter section while stirring it. [Background technology]

[0002] An example of a conventional filtration / drying apparatus is described in Patent Document 1. The filtration / drying apparatus described in Patent Document 1 includes a tank body, a filtration device (filter unit) provided on the bottom wall of the tank body, an agitator provided inside the tank body, and a heating jacket provided on the peripheral wall of the tank body. The filtration device includes a filter cloth and a porous filter plate that supports the filter cloth. The agitator includes a rotating shaft, an agitator blade provided on the rotating shaft, a rotation drive device for rotating the rotating shaft, and an elevation drive device for raising and lowering the rotating shaft.

[0003] When treating a material using the filtration and drying apparatus described in Patent Document 1, a drying process is carried out following a filtration process. In the filtration process, the material is introduced into the tank body, and liquid contained in the material is discharged through the filter cloth and porous filter plate. As a result, solids contained in the material are deposited as a cake layer on the surface of the filter cloth and adhere to the tank body, etc. In the drying process, the rotating shaft is rotated by the rotary drive device and raised and lowered by the lift drive device. In addition, a heat medium is introduced into the heating jacket. As a result, the solids in the cake layer are scraped off and stirred by the stirring blades, and heated and dried by the heat supplied from the heating jacket.

[0004] In the filtration and drying apparatus described in Patent Document 1, the solid matter constituting the cake layer can be scraped off with the stirring blades, but the solid matter adheres to the surface to which it is attached (such as the filter cloth or the inner surface of the tank body) via the liquid contained in the material to be treated, so it is not easy to remove the solid matter from the surface to which it is attached. Therefore, there has been a demand for a method to smoothly remove the solid matter from the surface to which it is attached, thereby shortening the time required from the start of the filtration process to the end of the drying process. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-155216 Summary of the Invention

[0006] An object of the present invention is to provide a filtration and drying method and a filtration and drying apparatus that can shorten the time required from the start of the filtration step to the end of the drying step.

[0007] In order to achieve the above-mentioned object, the filtration and drying method of the present invention is characterized by comprising a filtration preparation step of preparing a material to be treated, which includes solid matter and liquid matter, in the storage space of a container; a filtration step of filtering the material to be treated using a filter section provided in the container; a peeling step of peeling the solid matter captured by the filter section and attached to a surface to be treated, which includes the inner surfaces of the filter section and the container, from the surface to be treated in a stationary state; and a drying step that is started after the start of the peeling step and heats and dries the solid matter that has been peeled from the surface to be treated while stirring, and the peeling step includes a step of heating and drying the contact area on the surface of the solid matter that is in contact with the surface to be treated.

[0008] Generally, solid matter captured by the filter adheres to the receiving surface, which includes the inner surface of the filter and the container, and since the captured solid matter contains liquid and has a certain degree of adhesiveness, it is difficult to remove the solid matter from the receiving surface.

[0009] In the above-described filtration and drying method, the contact area of ​​the solid material surface that comes into contact with the surface to be adhered is heated and dried, thereby removing the liquid from the contact area, and the solid material can be easily peeled off from the surface to be adhered while left stationary. Furthermore, in the drying step, the solid material can be efficiently dried by heating it while stirring it. Therefore, the drying step can be started smoothly and the time required from the start of the filtration step to the end of the drying step can be shortened.

[0010] Another feature of the filtration and drying method according to the present invention is that the peeling step includes a step of heating and drying the contact area that has come into contact with the inner surface of the container.

[0011] Generally, the solid matter captured by the filter portion contains liquid matter and has a certain degree of stickiness, making it particularly difficult to peel the solid matter from the smooth inner surface (adhered surface) of the container.

[0012] In the above-mentioned filtration and drying method, the contact area of ​​the surface of the solid material that comes into contact with the inner surface of the container (the surface to be adhered) is heated and dried, thereby removing the liquid from the contact area, and the solid material can be easily peeled off from the inner surface of the container.

[0013] Another feature of the filtration and drying method of the present invention is that the peeling process includes an inner surface heating process in which the inner surface of the container, which becomes the surface to be adhered, is heated by heating the wall portion of the container from the outer surface side of the container.

[0014] In this filtration and drying method, the wall of the container is heated from the outer surface side of the container, so that by utilizing the outer surface of the container, it is easy to attach a heating means such as a jacket to the container.

[0015] Another feature of the filtration and drying method of the present invention is that it includes a peeling and holding step of holding the container in a peeled state in an area vertically below the filter portion in the storage space, ensuring at least a portion of a drying area for accommodating the solid material during the drying step, and the peeling step is performed with the container in the peeled state.

[0016] In this filtration and drying method, the solid matter peeled off from the inner surface (adhesion surface) of the filter part can be dropped into the drying area by gravity, so that the drying process can be started smoothly.

[0017] In order to achieve the above-mentioned object, the filtering and drying apparatus of the present invention is characterized in that it comprises a container having a storage space for storing a material to be treated, which includes solid matter and liquid matter; a filter section provided in the container for filtering the material to be treated; a peeling means for peeling the solid matter captured by the filter section and attached to a surface to be treated, including the inner surfaces of the filter section and the container, from the surface to be treated in a stationary state; and a heating and drying means for heating and drying the solid matter peeled from the surface to be treated, wherein the peeling means has a peeling heating device for heating a contact area on the surface of the solid matter attached to the surface to be treated that comes into contact with the surface to be treated, and the heating and drying means has a stirring device for stirring the solid matter peeled from the surface to be treated, and a drying heating device for heating the solid matter being stirred by the stirring device.

[0018] In this filtering and drying apparatus, the contact area of ​​the solid material surface that comes into contact with the surface to be adhered is heated and dried, thereby removing the liquid from the contact area, and the solid material can be easily peeled off from the surface to be adhered. Furthermore, during drying, the solid material is heated in a drying heater while being stirred in a stirrer, thereby efficiently drying the solid material. Therefore, the drying process can be started smoothly and the time required from the start of the filtering process to the end of the drying process can be shortened.

[0019] Another feature of the filtration and drying apparatus of the present invention is that the peeling heating device has an internal heating device configured to heat the internal surface of the container, which becomes the surface to be adhered, by heating the wall portion of the container from the outer surface side of the container.

[0020] In this filtration and drying apparatus, the wall of the container is heated from the outer surface side of the container, so that by utilizing the outer surface of the container, it is easy to attach an internal heating device such as a jacket to the container.

[0021] Another feature of the filtration and drying apparatus according to the present invention is that the peeling heating device has a microwave generating device that generates microwaves for dielectrically heating the solid matter adhering to the attachment surface.

[0022] In this filtration and drying device, the entire solid matter (including the contact area) adhering to the surface to be adhered can be quickly heated by dielectric heating, thereby shortening the time required to peel off the solid matter.

[0023] Another feature of the filtration drying device according to the present invention is that it comprises a solid matter discharge port provided in the container for discharging the heated and dried solid matter to the outside of the storage space, and a container state changer for changing the state of the container, wherein the container has a cylindrical peripheral wall portion extending in a vertical direction, an upper wall portion provided at an upper end of the peripheral wall portion so as to close an upper opening, and a lower wall portion provided at a lower end of the peripheral wall portion so as to close a lower opening, the filter portion and the solid matter discharge port being provided in the peripheral wall portion, and at least a part of the drying heating device being provided in the lower wall portion, and When the container is in a filtering state for performing a filtration process, the filter section is arranged at the vertically lower part of the container; when the container is in a peeling state for performing a peeling process, the lower wall section is arranged at the vertically lower part of the filter section; when the container is in a drying state for performing a drying process, the lower wall section is arranged at the vertically lower part of the container, and a dry area for storing the solid material is secured in the vertically lower area of ​​the storage space; and when the container is in a discharge state for performing a discharge process, the solid material discharge outlet is arranged at the vertically lower part of the container.

[0024] In this filtration / drying device, when the container is in a peeling state for performing the peeling process, the lower wall is positioned vertically below the filter, allowing the lower wall to receive solids peeled from the inner surface (the surface to be adhered) of the filter, allowing the drying process to begin smoothly. Furthermore, since the filter and solids discharge port are provided on the peripheral wall, a large installation space for the drying heating device can be secured in the lower wall, increasing design flexibility. Furthermore, in both processes, a clean area where no treated material is present can be secured vertically above the storage space, preventing the treated material from adhering to the clean area and preventing adverse effects caused by the treated material adhering to that area.

[0025] Another feature of the filtration and drying apparatus of the present invention is that the agitator has an agitator blade arranged in the drying area and a drive shaft inserted into a shaft through hole formed in the upper wall portion.

[0026] This filtration and drying device ensures a clean area where no treated material is present at the position where the axial through hole is formed, thereby preventing the treated material from adhering to the axial through hole and preventing the sealing ability of the axial through hole from being impaired. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a front view showing a configuration of a filtering device according to an embodiment. [Figure 2] FIG. 2 is a rear view showing the configuration of the filtration and drying device according to the embodiment. [Figure 3] 3 is a cross-sectional view taken along line III-III in FIG. 1, illustrating the configuration of the filtration and drying device according to the embodiment. FIG. [Figure 4] FIG. 2 is a piping diagram showing a piping system of the filtration and drying device according to the embodiment. [Figure 5] 5(A) is a plan view showing the configuration of the main parts of the filtration and drying device, (B) is a cross-sectional view taken along line VB-VB in FIG. 5(A) showing the configuration of the main parts of the filtration and drying device, and (C) is an enlarged view of the VC portion in FIG. 5(B). [Figure 6] FIG. 2 is a process diagram showing each step of the filtration and drying method according to the embodiment. [Figure 7] 10A is a diagram showing a charging step and a charging and holding step. [Figure 8] (B-1) is a diagram showing the dissolving step and the filtration preparation holding step, and (B-2) is a diagram showing the crystallization step and the filtration preparation holding step. [Figure 9] (C) shows the filtration step and the filtration retention step. [Figure 10] (D) shows the peeling step and the peeling and holding step. [Figure 11] (E) is a diagram showing the drying step and the dry holding step, and (F) is a diagram showing the discharge step and the discharge holding step. [Figure 12] FIG. 10 is a partial cross-sectional view showing the configuration of a filtration and drying device according to another embodiment. [Figure 13] FIG. 10(A) is a diagram showing a first modified example of the peeling step, and FIG. 10(B) is a diagram showing a second modified example of the peeling step. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, a filtration drying apparatus and a filtration drying method according to an embodiment of the present invention will be described with reference to the drawings.

[0029] (Filtration and drying device according to an embodiment) FIG. 1 is a front view showing the configuration of a filtration drying apparatus 10 according to an embodiment. FIG. 2 is a rear view showing the configuration of the filtration drying apparatus 10. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 showing the configuration of the filtration drying apparatus 10. FIG. 4 is a piping diagram showing the piping system of the filtration drying apparatus 10. FIG. 5(A) is a plan view showing the configuration of the main parts of the filtration drying apparatus 10, and FIG. 5(B) is a cross-sectional view taken along line VB-VB in FIG. 5(A) showing the configuration of the main parts of the filtration drying apparatus 10. FIG. 5(C) is an enlarged view of a portion VC in FIG. 5(B).

[0030] In the following description, the directions of "front, back, left, right, up, and down" correspond to the directions indicated by arrows in the drawings. The front view (FIG. 1) is a view of the filtration and drying apparatus 10 as seen from the front, and the rear view (FIG. 2) is a view of the filtration and drying apparatus 10 as seen from the rear.

[0031] The filtration drying apparatus 10 shown in Figures 1, 2, 3, and 4 is an apparatus for performing each step (Figure 6) of a filtration drying method described below in a chemical plant or the like. As shown in Figure 3, the filtration drying apparatus 10 includes a container 12 having a storage space S for storing a workpiece W (Figure 7(A)), and a first jacket 14, a second jacket 16, a filter unit 18, and an agitator 20 provided in the container 12. Furthermore, as shown in Figure 4, the filtration drying apparatus 10 includes a container state change unit 22 and a control unit 24.

[0032] As shown in FIG. 5(B), the container 12 has a cylindrical peripheral wall 26 extending in the vertical direction, a disk-shaped upper wall 28 provided at the upper end of the peripheral wall 26 to close the upper opening, and a disk-shaped lower wall 30 provided at the lower end of the peripheral wall 26 to close the lower opening. The peripheral wall 26, the upper wall 28, and the lower wall 30 are formed of a metal such as stainless steel, and together they form a cylindrical, bottomed "wall" of the container 12. That is, in this embodiment, the peripheral wall 26, the upper wall 28, and the lower wall 30 each constitute a wall of the container 12 that defines the storage space S. Here, the "vertical direction" refers to the vertical direction when the axis L (FIG. 7(A)) of the container 12 is positioned parallel to the vertical direction, and does not refer to the vertical direction. Therefore, if the container 12 is tilted with respect to the vertical direction, the "vertical direction" becomes a direction that intersects with the vertical direction.

[0033] A solid matter discharge port 32 is formed in a forward-facing portion of the lower part of the peripheral wall portion 26 for discharging solid matter W1 (FIG. 11(F)) that has been captured by the filter portion 18 and then heated and dried to the outside of the storage space S. A cylindrical first discharge nozzle 34 made of a metal such as stainless steel is provided at the solid matter discharge port 32 so as to protrude outward. An annular flange 34a is formed at the tip of the first discharge nozzle 34, and a first lid portion 36 is detachably attached to the tip.

[0034] The first lid portion 36 has a disk-shaped lid plate portion 36a and a cylindrical core 36b with a bottom joined to one surface of the lid plate portion 36a. The core 36b is arranged to fill the internal space of the first discharge nozzle 34, and the lid plate portion 36a is fixed to the flange 34a using a first clamp 38.

[0035] A liquid discharge port 40 is formed in a rearward-facing portion of the lower part of the peripheral wall 26, for discharging the liquid (filtrate) of the workpiece W filtered in the filtration step (FIG. 9(C)). A cylindrical second discharge nozzle 42 made of a heat-conductive metal such as stainless steel is provided at the liquid discharge port 40 so as to protrude outward. An annular flange 42a is formed at the tip of the second discharge nozzle 42, and a second lid 44 is detachably attached to it. As shown in FIG. 5(C), an annular protrusion 42b is formed on the inner circumferential surface of the base end of the second discharge nozzle 42.

[0036] The base end of the second discharge nozzle 42 is joined to the inner periphery of the liquid material discharge port 40 by welding or the like, and the protrusion 42b is connected to the peripheral wall 26 via the base end of the second discharge nozzle 42. Therefore, the base end and protrusion 42b of the second discharge nozzle 42 are part of the wall of the container 12, just like the peripheral wall 26, the upper wall 28, and the lower wall 30.

[0037] The second lid portion 44 shown in Fig. 5(B) has a disk-shaped lid plate portion 44a, and a discharge pipe connection hole 46 is formed in the lower part of the lid plate portion 44a. The lid plate portion 44a is fixed to the flange 42a using a second clamp 48. As shown in Fig. 4, the upstream end of a discharge pipe 50 is connected to the discharge pipe connection hole 46.

[0038] As shown in Figure 5(B), a shaft through-hole 52 through which the drive shaft 116 of the agitator 20 is inserted is formed in the center of the upper wall 28, and an inlet 54 for introducing the workpiece W (Figure 7(A)) into the storage space S and an instrument mounting hole 56 are formed in a portion off the center of the upper wall 28. A cylindrical nozzle 58 is connected to the inlet 54, and a lid 60 is detachably attached to the tip of the nozzle 58. A gauge 62 such as a pressure gauge is attached to the instrument mounting hole 56.

[0039] As shown in FIG. 5(A), two sight window mounting holes 64a, 64b and two pressurization hose connection holes 66a, 66b are formed in a portion of the upper wall portion 28 that is off the center. Sight windows 68a, 68b are attached to the sight window mounting holes 64a, 64b. As shown in FIG. 4, the downstream ends of pressurization hoses 70a, 70b are connected to the pressurization hose connection holes 66a, 66b. The upstream ends of the pressurization hoses 70a, 70b are connected to a gas source 74 that discharges a pressurization gas such as nitrogen gas via an on-off valve 72. The on-off valve 72 is electrically connected to the control unit 24, and the on-off valve 72 is controlled in response to a control signal provided by the control unit 24.

[0040] As shown in Figure 5(B), a first jacket 14 is provided on the peripheral wall portion 26 of the container 12 as a heating device for heating the workpiece W (Figures 8(B-1), 10(D), and 11(E)) that comes into contact with the peripheral wall portion 26.

[0041] The first jacket 14 has a jacket body 76 formed along the outer surface of the peripheral wall portion 26, and a first heat medium flow path 78 through which a heat medium flows is formed between the peripheral wall portion 26 and the jacket body 76. As shown in Fig. 5(A), a heat medium inlet 80a and a heat medium outlet 80b are provided in the jacket body 76 at an interval.

[0042] As shown in Fig. 4, the downstream end of a first heat medium supply pipe 82a is connected to the heat medium inlet 80a, and the upstream end of a first heat medium discharge pipe 82b is connected to the heat medium outlet 80b. The upstream end of the first heat medium supply pipe 82a is connected to a discharge port 84a of a pump 84. A hot water source 88 is connected to a suction port 84b of the pump 84 via an on-off valve 86 and the like, and a cold water source 92 is connected to the suction port 84b of the pump 84 via an on-off valve 90 and the like. Therefore, when the on-off valve 86 is opened and the on-off valve 90 is closed, hot water is supplied to the first jacket 14 (Fig. 5(B)). On the other hand, when the on-off valve 86 is closed and the on-off valve 90 is opened, cold water is supplied to the first jacket 14.

[0043] 4, the control unit 24 is electrically connected to the pump 84, and the pump 84 is driven or stopped in response to a control signal given from the control unit 24. The control unit 24 is also electrically connected to the on-off valves 86, 90, and the on-off valves 86, 90 are controlled in response to a control signal given from the control unit 24. The type of heat medium is not limited to hot water and cold water, and steam, temperature-controlled gas, etc. may also be used.

[0044] As shown in Figure 5(B), a second jacket 16 is provided on the lower wall portion 30 of the container 12 as a heating device for heating the workpiece W (Figures 8(B-1), 10(D), and 11(E)) that comes into contact with the lower wall portion 30.

[0045] The second jacket 16 has a jacket body 94 formed along the outer surface of the lower wall portion 30, and a second heat medium flow path 96 through which the heat medium flows is formed between the lower wall portion 30 and the jacket body 94. The jacket body 94 is provided with a heat medium inlet 98a and a heat medium outlet 98b (FIG. 5(A)) spaced apart from each other.

[0046] 4, the downstream end of a second heat medium supply pipe 100a is connected to the heat medium inlet 98a, and the upstream end of a second heat medium discharge pipe 100b is connected to the heat medium outlet 98b. The upstream end of the second heat medium supply pipe 100a is connected to the discharge port 84a of the pump 84. Therefore, the pump 84 can supply the same type of heat medium to the first jacket 14 and the second jacket 16 simultaneously.

[0047] The first jacket 14 and the second jacket 16 are a "heating device for peeling" for heating the contact area X of the solid material W1 (FIG. 10(D)), and are also a "heating device for drying" for heating and drying the solid material W1 (FIG. 11(E)). In addition, the first jacket 14 and the second jacket 16, in cooperation with the pump 84, the on-off valves 86 and 90, the control unit 24, etc. shown in FIG. 4, constitute a "peeling means" for peeling the solid material W1 (FIG. 10(D)) from the attachment surface 142, and also constitute a "heating and drying means" for heating and drying the solid material W1 (FIG. 11(E)).

[0048] When a heat medium is supplied to the first jacket 14 and the second jacket 16 shown in FIG. 5(B), the peripheral wall 26 and the lower wall 30 of the container 12 are heated or cooled by the heat medium. In addition, the upper wall 28 connected to the peripheral wall 26, and the base end and protrusion 42b of the second discharge nozzle 42 are heated or cooled. In other words, the entire wall of the container 12 that constitutes the storage space S is heated or cooled. As a result, heat exchange occurs between the workpiece W (FIGS. 8(B-1), 10(D), and 11(E)) accommodated in the storage space S and the wall of the container 12, and the workpiece W is heated or cooled.

[0049] As shown in Figure 5(C), a filter unit 18 is provided on the peripheral wall 26 via the second discharge nozzle 42. The filter unit 18 is a member for filtering the material to be treated W (Figure 8(C)), and has a filter cloth 104 placed in an opening 102 on the base end side of the second discharge nozzle 42, and a support 106 that supports the filter cloth 104 inside the second discharge nozzle 42.

[0050] The support 106 has a filter plate portion 108 that contacts the surface of the filter cloth 104 facing outward from the storage space S, and a cylindrical clamping portion 110 that cooperates with the protrusion 42b of the second discharge nozzle 42 to clamp the outer periphery of the filter cloth 104. The entire support 106 is made of a heat-conducting metal such as stainless steel.

[0051] The filter plate section 108 is formed with a size that allows it to close the opening 102 of the second discharge nozzle 42, and is formed with a plurality of through holes 108a for passing liquid (filtrate) contained in the material to be treated W. The clamping section 110 is formed integrally with the filter plate section 108, and an annular groove 112 is formed in the outer circumferential surface of the clamping section 110. An O-ring 114 that seals the gap between the inner circumferential surface of the second discharge nozzle 42 and the outer circumferential surface of the clamping section 110 is attached to the groove 112.

[0052] As shown in Figure 5(C), the inner peripheral surface of the second discharge nozzle 42 and the outer peripheral surface of the support 106 that constitutes the filter section 18 face each other. Therefore, when the peripheral wall section 26 of the container 12 is heated by the heat medium supplied to the first jacket 14 (Figure 5(B)), the heat is transferred from the second discharge nozzle 42 to the support 106, heating the entire support 106 and the filter cloth 104 in contact with the filter plate section 108.

[0053] The stirring device 20 shown in Figure 5(B) is a device for stirring the workpiece W (Figures 8(B-1), (B-2), Figures 11(E), (F)) in the storage space S, and has a drive shaft 116, a stirring blade 118, and a drive motor 120.

[0054] The drive shaft 116 is a rod-shaped member that extends in the axial direction of the container 12 in the accommodation space S. The lower end of the drive shaft 116 is disposed close to the lower wall portion 30, and the upper end of the drive shaft 116 is inserted into a shaft through-hole 52 formed in the upper wall portion 28 and disposed so as to protrude outside the accommodation space S. The drive shaft 116 may be inserted directly into the shaft through-hole 52, or may be inserted via a sleeve pipe (not shown) attached to the shaft through-hole 52.

[0055] The mixing blade 118 has a fixed part 118a fixed to the tip of the drive shaft 116, and a plurality of blade members 118b provided on the fixed part 118a.

[0056] The drive motor 120 is attached to the upper surface of the upper wall portion 28 via a mounting base 122, and the rotation shaft (not shown) of the drive motor 120 is connected to the upper end of the drive shaft 116. As shown in Fig. 4, the control unit 24 is electrically connected to the drive motor 120, and the drive motor 120 rotates or stops in response to a control signal given from the control unit 24.

[0057] As shown in Figures 1 and 2, the container state change unit 22 is a member for changing the state of the container 12, and has a pair of stands 124a, 124b arranged on both the left and right sides of the container 12, a pair of bearing units 126a, 126b, a pair of rotating shafts 128a, 128b, and a rotating operation unit 130.

[0058] Each of the pair of mounts 124a, 124b is configured by joining a rod-shaped base 132 having a rectangular cross section and a rod-shaped support 134 also having a rectangular cross section in an inverted T shape. The base 132 is arranged to extend in the front-to-rear direction, and the support 134 is arranged to extend in the vertical direction. Bearings 126a, 126b are provided at the upper ends of the support 134, 134 that constitute each of the mounts 124a, 124b.

[0059] Each of the pair of rotation shafts 128a, 128b is a rod-shaped member having a common rotation center that extends in the left-right direction in a horizontal plane. The left end of the right rotation shaft 128a is joined to the right side surface of the container 12, and the right end of the left rotation shaft 128b is joined to the left side surface of the container 12. The right end of the right rotation shaft 128a is rotatably supported by bearing portion 126a, and the left end of the left rotation shaft 128b is rotatably supported by bearing portion 126b.

[0060] The rotation operation unit 130 is a part that changes the inclination angle of the container 12 by rotating the right-side rotation shaft 128a, and has a gear unit 136 incorporated in the right-side bearing part 126a, a drive motor 138 for inputting a rotational force to the input end of the gear unit 136, and a manual handle 140 for inputting a rotational force to the input end of the gear unit 136. The output end of the gear unit 136 is connected to the right-side rotation shaft 128a.

[0061] 4, the control unit 24 is electrically connected to the drive motor 138, and the drive motor 138 rotates or stops in response to a control signal given from the control unit 24. The container state changing unit 22 of this embodiment is configured to execute each holding process shown in FIG. 6 in response to a control signal given from the control unit 24.

[0062] The rotation operation unit 130 may be configured to change the tilt angle of the container 12 by rotating the left rotation shaft 128b. Also, the user may change the tilt angle of the container 12 by turning the manual handle 140 to rotate the rotation shaft 128a.

[0063] 4 is a device that controls each electrical device for operating the filtering and drying apparatus 10, and is configured by a microcomputer (not shown) that includes a CPU, ROM, RAM, a timer, etc. The ROM stores operation programs for each electrical device.

[0064] (Filtration and drying method according to an embodiment) Fig. 6 is a process diagram showing each step of the filtration and drying method according to the embodiment. Fig. 7(A) is a diagram showing the charging step and charging and holding step. Fig. 8(B-1) is a diagram showing the dissolving step and filtration preparation and holding step, and Fig. 8(B-2) is a diagram showing the crystallization step and filtration preparation and holding step. Fig. 9(C) is a diagram showing the filtration step and filtration and holding step. Fig. 10(D) is a diagram showing the peeling step and peeling and holding step. Fig. 11(E) is a diagram showing the drying step and drying and holding step, and Fig. 11(F) is a diagram showing the discharge step and discharge and holding step.

[0065] 6, when filtering and drying the workpiece W using the filtering and drying apparatus 10, the processing of the workpiece W involves a loading step, a dissolving step, a crystallization step, a filtration step, a peeling step, a drying step, and a discharging step, in this order. Furthermore, the holding of the container 12 involves a loading and holding step, a filtration preparation and holding step, a filtration and holding step, a peeling and holding step, a drying and holding step, and a discharging and holding step, in this order. In other words, the filtering and drying method according to this embodiment includes seven processing steps for the processing of the workpiece W and six holding steps for holding the container 12. The processing steps and holding steps are performed in parallel in correspondence with each other.

[0066] The term "processing target W" refers to the entire substance processed in each processing step. The processing target W may be in a state containing both solid and liquid matter, a state containing only solid matter, or a state containing only liquid matter.

[0067] The "container state" shown in Fig. 6 is a state related to the attitude of the container 12, and the state of the container 12 corresponding to each processing step is shown in a conceptual diagram in Fig. 6. In each holding step, the control unit 24 (Fig. 4) controls the drive motor 138 of the container state changing unit 22 to appropriately switch the state of the container 12 and hold the container 12 in the switched state.

[0068] 6 refers to the state of the agitator blades 118, specifically, either rotating or stopped. The control unit 24 (FIG. 4) controls the drive motor 120 of the agitator 20 to appropriately switch the state of the agitator 20 according to each processing step and to maintain the switched state.

[0069] 6 refers to the supply state of the heat medium (hot water or cold water) to the first jacket 14 and the second jacket 16. The control unit 24 (FIG. 4) controls the pump 84 and the on-off valves 86 and 90 to appropriately switch the supply state of the heat medium according to each treatment step and to maintain the switched state.

[0070] The "filtration preparation step" shown in Fig. 6 is a step of preparing a workpiece W containing solid matter and liquid matter in the filtration preparation region M (Figs. 8(B-1), (B-2)) of the container 12 in a filtration preparation state, and includes a dissolving step and a crystallization step. That is, in this embodiment, the workpiece W containing solid matter and liquid matter, which is the object to be filtered, is prepared by the dissolving step and the crystallization step.

[0071] Each processing step and each holding step will be described below with reference to Figures 6, 7, 8, 9, 10, and 11. The area indicated by dashed hatching in the figures is a clean area Q where no workpieces W are present during any of the steps from the loading step to the discharging step and at any transitions between these steps. In other words, the filtration and drying apparatus 10 is configured to perform all of the steps from the loading step to the discharging step while maintaining the clean area Q in the accommodation space S.

[0072] 5(A) and (B), in this embodiment, the shaft through-hole 52, the inlet 54, the meter mounting hole 56, the sight glass mounting holes 64a, 64b, and the pressurizing hose connection holes 66a, 66b are formed in the upper wall portion 28 of the container 12, and it is necessary to prevent the workpiece W from adhering to these. Therefore, in each holding step, the control unit 24 (FIG. 4) controls the drive motor 138 of the container state changing unit 22 so as to ensure a clean region Q in the region in the storage space S where these are located.

[0073] The control unit 24 (FIG. 4) starts control operations for each processing step and each holding step in response to an input signal from a drive switch operated by the user, and stops control operations for each processing step and each holding step in response to an input signal from a stop switch operated by the user. The user operates the drive switch and the stop switch while visually checking the condition inside the storage space S through the viewing windows 68a, 68b.

[0074] (Feeding process and feeding and holding process) 6 and 7(A) is a step of putting the workpiece W into the storage space S of the container 12. When the putting step is performed, the putting and holding step is started before the putting step.

[0075] As shown in Fig. 7(A), in the loading and holding step, the control unit 24 (Fig. 4) controls the drive motor 138 of the container state change unit 22 to hold the container 12 in the loaded state. Here, the loaded state is a state of the container 12 in which the axis L extends vertically. In this embodiment, the loading step is performed with the container 12 in the loaded state.

[0076] As shown in Fig. 6, in the loading step, the control unit 24 (Fig. 4) controls the drive motor 120 to stop the agitator 20, and controls the pump 84 and the on-off valves 86 and 90 to stop the supply of the heat medium. As shown in Fig. 7(A), the user loads the workpiece W into the storage space S from the nozzle 58 of the container 12, and then attaches the lid 60 (Fig. 8(B-1)) to the nozzle 58. In this embodiment, the workpiece W loaded into the storage space S includes a liquid material and a solid material.

[0077] (Dissolution process and filtration preparation holding process) The dissolving process shown in Figures 6 and 8 (B-1) is a process of dissolving solid matter of the workpiece W introduced into the storage space S into a liquid to produce a solution. When the dissolving process is carried out, the filtration preparation holding process is started before the dissolving process.

[0078] As shown in Fig. 8(B-1), in the filtration preparation holding step, the control unit 24 (Fig. 4) controls the drive motor 138 of the container state changing unit 22 so as to switch the state of the container 12 from the loading state to the filtration preparation state and to hold the container 12 in the filtration preparation state. In this embodiment, the control unit 24 controls the drive motor 138 of the container state changing unit 22 so as to rotate the container 12, which is in the loading state shown in Fig. 7(A), 45 degrees counterclockwise from the state shown in the figure and stop it. Therefore, the inclination angle of the container 12 with respect to the horizontal plane becomes 45 degrees.

[0079] Here, the filtration preparation state is a state in which a filtration preparation region M for preparing a treatment object W (object to be filtered) containing solid matter is secured in an area vertically below the filter unit 18 in the storage space S, and a clean region Q is secured in an area vertically above the filter unit 18 in the storage space S. In the filtration preparation state, the stirring blades 118 of the stirring device 20 are arranged in the filtration preparation region M. The dissolving process is performed in the container 12 in the filtration preparation state.

[0080] Note that "vertically below filter unit 18" means below filter unit 18 in the vertical direction, and does not mean only directly below the filter unit. Also, "vertically above filter unit 18" means above filter unit 18 in the vertical direction, and does not mean only directly above the filter unit.

[0081] As shown in Fig. 6, in the dissolving step, the control unit 24 (Fig. 4) controls the drive motor 120 to put the agitator 20 into a rotating state, and also controls the pump 84 and the on-off valves 86 and 90 to put the heat medium into a hot water supply state. Then, the workpiece W in the filtration preparation area M shown in Fig. 8 (B-1) is heated by the hot water supplied to the first jacket 14 and the second jacket 16 and agitated by the agitating blades 118, and the solid matter contained in the workpiece W is efficiently dissolved in the liquid.

[0082] The inclination angle of the container 12 in the filtration preparation holding step is not limited to 45 degrees and can be changed as appropriate. However, in order to prevent solid matter contained in the material W from adhering to the filter section 18 in the subsequent crystallization step, the inclination angle needs to be determined so that a filtration preparation region M can be secured in an area vertically below the filter section 18. Furthermore, in order to prevent the material W from adhering to the shaft through-hole 52, the inlet 54, the instrument mounting hole 56, the sight glass mounting holes 64a, 64b, and the pressurization hose connection holes 66a, 66b formed in the upper wall section 28, the inclination angle needs to be determined so that a clean region Q can be secured in the area where these are located.

[0083] (Crystallization process and filtration preparation process) The crystallization process shown in Figures 6 and 8 (B-2) is a process for precipitating solid matter from the liquid matter of the workpiece W. When the crystallization process is performed, the filtration preparation holding process, which was started before the dissolving process, is continued. The crystallization process is performed in the container 12 in the filtration preparation state.

[0084] As shown in Fig. 6, in the crystallization step, the control unit 24 (Fig. 4) controls the drive motor 120 to rotate the agitator 20, and controls the pump 84 and the on-off valves 86 and 90 to supply cold water as the heat medium. This cools the solution in the filtration preparation region M, causing solid matter to precipitate. That is, the control unit 24 in this embodiment performs "cooling crystallization," which crystallizes solid matter by cooling the workpiece W.

[0085] (Filtration process and filtration retention process) The filtration process shown in Figures 6 and 9(C) is a process in which the workpiece W, which contains solid matter and liquid matter, is filtered by the filter unit 18, thereby discharging the liquid matter contained in the workpiece W from the second discharge nozzle 42 and capturing the solid matter contained in the workpiece W. When the filtration process is performed, the filtration retention process is started before the filtration process. In the following description, the solid matter captured by the filter unit 18 in the filtration process will be referred to as "solid matter W1."

[0086] As shown in Fig. 9(C), in the filtration holding step, the control unit 24 (Fig. 4) controls the drive motor 138 of the container state changing unit 22 to switch the state of the container 12 from the filtration preparation state to the filtration state and hold the container 12 in the filtration state. In this embodiment, the control unit 24 controls the drive motor 138 of the container state changing unit 22 to rotate the container 12, which is in the filtration preparation state shown in Fig. 8(B-2), 90 degrees clockwise from the state shown in the figure and stop it. Therefore, the inclination angle of the container 12 with respect to the horizontal plane becomes 45 degrees.

[0087] Here, the filtering state refers to a state in which the filter unit 18 is disposed vertically below the container 12, and a clean area Q is secured in an area vertically above the filter unit 18 in the accommodation space S. The filtering process is performed with the container 12 in the filtering state.

[0088] As shown in Fig. 6, in the filtration step, the control unit 24 (Fig. 4) controls the drive motor 120 to stop the agitator 20, and also controls the pump 84 and the on-off valves 86 and 90 to stop the supply of the heat medium. The control unit 24 also controls the on-off valve 72 to supply pressurizing gas from the gas source 74 to the storage space S through the pressurizing hose connection holes 66a and 66b. The pressurizing gas then presses the workpiece W against the filter cloth 104 of the filter unit 18, and liquid matter contained in the workpiece W passes through the filter cloth 104 and is discharged to the outside of the storage space S. Furthermore, solid matter W1 contained in the workpiece W is captured by the filter unit 18.

[0089] As shown in Figure 9(C), the solid matter W1 captured by the filter unit 18 adheres to an adhesion surface 142 including the inner surfaces of the filter unit 18 and the container 12. Here, the inner surface of the filter unit 18 mainly refers to the surface of the filter cloth 104 facing the inside of the storage space S, and the inner surface of the container 12 refers to the inner surface of the wall of the container 12. The adhesion surface 142 does not mean a narrow range of surface to which the solid matter W1 actually adheres, but rather means a wide range of surface to which the solid matter W1 is expected to adhere.

[0090] The inclination angle of the container 12 in the filtration and retention step is not limited to 45 degrees and can be changed as appropriate. However, in order to prevent the material W from adhering to the shaft through-hole 52, the feed port 54, the instrument mounting hole 56, the sight glass mounting holes 64a, 64b, and the pressurizing hose connection holes 66a, 66b formed in the upper wall portion 28, the inclination angle must be determined so as to ensure a clean area Q in the area where these are located.

[0091] (Peeling process and peeling and holding process) 6 and 10(D) is a process of separating the solid matter W1 captured by the filter unit 18 and attached to the attachment surface 142 from the attachment surface 142 in a stationary state. Here, "stationary state" means a state in which the solid matter W1 is left stationary without being stirred. When the peeling process is performed, the peeling and holding process is started before the peeling process.

[0092] As shown in Fig. 10(D), in the peeling and holding step, the control unit 24 (Fig. 4) controls the drive motor 138 of the container state change unit 22 to switch the state of the container 12 from the filtration state to the peeling state and hold the container 12 in the peeling state. In this embodiment, the control unit 24 controls the drive motor 138 of the container state change unit 22 to rotate the container 12, which is in the filtration state shown in Fig. 9(C), 90 degrees counterclockwise from the state shown in the figure and stop it. Therefore, the inclination angle of the container 12 with respect to the horizontal plane becomes 45 degrees.

[0093] Here, the peeling state refers to a state in which at least a portion of a drying region N for accommodating solid matter W1 during the drying process is secured in a region vertically below the filter portion 18 in the storage space S, the lower wall portion 30 is disposed vertically below the filter portion 18, and a clean region Q is secured in a region vertically above the filter portion 18 in the storage space S. The peeling process is performed with the container 12 in the peeling state. In this embodiment, at least a portion of the drying region N is secured in a region vertically directly below the filter portion 18 in the storage space S. The peeling process is performed with the container 12 in the peeling state.

[0094] As shown in Fig. 6, in the peeling step, the control unit 24 (Fig. 4) controls the drive motor 120 to stop the agitator 20, and controls the pump 84 and the on-off valves 86 and 90 to supply hot water as the heat medium. The heat medium supplied to the first jacket 14 and the second jacket 16 shown in Fig. 10(D) heats the adhesion surface 142, and the contact area X on the surface of the solid object W1 that comes into contact with the adhesion surface 142 is heated and dried. In other words, the peeling step includes a step of heating and drying the contact area X on the surface of the solid object W1 that comes into contact with the adhesion surface 142.

[0095] When the contact area X dries, the liquid matter is removed from the contact area X, and the solid matter W1 is peeled off from the receiving surface 142 and falls or slides toward a region vertically below the receiving space S.

[0096] In this embodiment, hot water is supplied to the first jacket 14 and the second jacket 16 provided outside the container 12, and the wall of the container 12 is heated from the outer surface side by the hot water, thereby heating the inner surface of the container 12. In other words, the peeling process of this embodiment includes an "inner surface heating process" in which the inner surface of the container 12, which becomes the attachment surface 142, is heated by heating the wall of the container 12 from the outer surface side of the container 12. Focusing on the filtration and drying apparatus 10, the first jacket 14 and the second jacket 16 constituting the "peeling heating device" function as an "inner surface heating device" configured to heat the inner surface of the container 12, which becomes the attachment surface 142, by heating the wall of the container 12 from the outer surface side of the container 12.

[0097] (Drying process and dry keeping process) 6 and 11(E) is a process of heating and drying the solid matter W1 peeled off from the attachment surface 142 while stirring it. When the drying process is performed, the drying and maintaining process is started before the drying process.

[0098] 11(E), in the dry holding step, the control unit 24 (FIG. 4) controls the drive motor 138 of the container state changing unit 22 so as to switch the state of the container 12 from the peeled state to the dry state and to hold the container 12 in the dry state. In this embodiment, the control unit 24 controls the drive motor 138 of the container state changing unit 22 so as to rotate the container 12, which is in the peeled state shown in FIG. 10(D), 45 degrees clockwise from the state shown in the figure and stop it.

[0099] Here, the dry state is a state in which a dry region N for storing solid matter W1 is secured in a region vertically below the storage space S, the lower wall portion 30 is disposed vertically below the container 12, and a clean region Q is secured in a region vertically above the dry region N in the storage space S. The dry state in this embodiment corresponds to the loading state. In the dry state, the agitator blades 118 of the agitator 20 are disposed in the dry region N. The drying process is performed with the container 12 in a dry state.

[0100] 6, in the drying step, the control unit 24 (FIG. 4) controls the drive motor 120 to rotate the agitator 20, and controls the pump 84 and the on-off valves 86 and 90 to supply hot water as the heat medium. Then, the solid material W1 in the drying region N shown in FIG. 11(E) is heated by the hot water supplied to the first jacket 14 and the second jacket 16 and agitated by the agitator blades 118.

[0101] In this embodiment, since the drying state is the same as the loading state, the upper surface of the lower wall portion 30 is horizontal, and the solid material W1 can be easily placed on this upper surface with a uniform thickness. Therefore, in combination with the second jacket 16 provided on the lower wall portion 30, the solid material W1 can be dried efficiently.

[0102] (Discharge process and discharge holding process) 6 and 11(F) is a process of discharging the solid matter W1 of the workpiece W, which has been captured in the filtering process and dried in the drying process, from the first discharge nozzle 34. When the discharge process is performed, the discharge holding process is started before the discharge process.

[0103] As shown in Fig. 11(F), in the discharge holding step, the control unit 24 (Fig. 4) controls the drive motor 138 of the container state changing unit 22 to switch the state of the container 12 from the dry state to the discharge state and hold the container 12 in the discharge state. In this embodiment, the control unit 24 controls the drive motor 138 of the container state changing unit 22 to rotate the container 12, which is in the dry state shown in Fig. 11(E), 45 degrees counterclockwise from the state shown in the figure and stop it. Therefore, the inclination angle of the container 12 with respect to the horizontal plane becomes 45 degrees.

[0104] Here, the discharge state refers to a state in which the solid discharge outlet 32 ​​is located vertically below the container 12, and a clean area Q is secured in an area vertically above the solid discharge outlet 32 ​​in the storage space S. The discharge step is performed with the container 12 in a dry state.

[0105] As shown in Figure 11(F), in the discharging step, the user removes the first lid portion 36 (Figure 5(B)) from the tip of the first discharging nozzle 34. As shown in Figure 6, in the discharging step, the control unit 24 (Figure 4) controls the drive motor 120 to put the agitator 20 into a rotating state, and controls the pump 84 and the on-off valves 86 and 90 to stop the supply of the heat medium.

[0106] The inclination angle of the container 12 in the discharge and holding step is not limited to 45 degrees and can be changed as appropriate. However, in order to discharge the dried solid matter from the solid matter discharge outlet 32, the inclination angle needs to be determined so that the solid matter discharge outlet 32 ​​is located at the lowest part of the container 12.

[0107] (Effects of the embodiment) The filtration-drying apparatus 10 and the filtration-drying method of this embodiment have the above-described configuration and can achieve the following effects: In the peeling step shown in Fig. 10(D), the contact area X on the surface of the solid material W1 that is in contact with the attachment surface 142 is heated and dried, thereby removing the liquid from the contact area X, and the solid material W1 can be easily peeled off from the attachment surface 142 while left stationary.

[0108] In the drying step shown in FIG. 11(E), the solid material W1 is heated in the first jacket 14 and the second jacket 16 while being stirred by the stirring device 20, whereby the solid material W1 can be dried efficiently.

[0109] Therefore, the drying process can be started smoothly, and the time required from the start of the filtering process to the end of the drying process can be shortened.

[0110] In the peeling process shown in Figure 10 (D), the contact area X on the surface of the solid material W1 that comes into contact with the adhesion surface 142 on the inner surface of the container 12 is heated and dried, thereby removing the liquid from the contact area X, and therefore the solid material W1 can be easily peeled off from the inner surface of the container 12.

[0111] In addition, this peeling process includes an "internal heating process" in which the internal surface of the container 12, which becomes the attachment surface 142, is heated by heating the wall of the container 12 from the outer surface side of the container 12 using the first jacket 14 and the second jacket 16. In other words, the first jacket 14 and the second jacket 16 function as an "internal heating device," so that by utilizing the outer surface of the container 12, the first jacket 14 and the second jacket 16 can be easily attached to the container 12.

[0112] In the peeling and holding process shown in Figure 10 (D), the container 12 is held in a peeled state in an area vertically below the filter section 18 in the storage space S, ensuring at least a portion of the drying area N for storing the solid matter W1 during the drying process.Therefore, when the peeling process is performed, the solid matter W1 peeled from the inner surface (adhered surface) of the filter section 18 can fall by gravity into the drying area N, allowing the drying process to begin smoothly.

[0113] As shown in Figure 10 (D), when the container 12 is in a peeling state for performing the peeling process, the lower wall portion 30 is positioned vertically below the filter portion 18, so that the solid matter W1 peeled off from the inner surface (adhesion surface) of the filter portion 18 can be received by the lower wall portion 30, allowing the drying process to be started smoothly.

[0114] In the filtration preparation process shown in Figures 8(B-1) and (B-2), a filtration preparation area M is secured in an area vertically below the filter section 18 in the storage space S, and the material to be treated S containing solids and liquids is prepared in the filtration preparation area M, thereby preventing the solids contained in the material to be treated W from adhering to the filter section 18 and thus preventing a decrease in filtration performance.

[0115] 5(A) and 5(B) are provided on the peripheral wall 26, a large installation space for the second jacket 16 on the lower wall 30 can be secured, increasing the degree of freedom in design. Furthermore, in either process, a clean region Q where no workpieces W are present can be secured in the region vertically above the accommodation space S, so that the workpieces W can be prevented from adhering to parts within the clean region Q, thereby preventing adverse effects caused by the workpieces W adhering to those parts.

[0116] (Modification of filtration and drying device) The present invention is not limited to the filtration and drying apparatus 10 of the above embodiment, and various modifications are possible without departing from the scope of the present invention. That is, in the above embodiment, the container 12 is formed in a cylindrical shape with a bottom, but the shape of the container 12 is not limited to a cylindrical shape with a bottom, and may be formed in a spherical shape, an ellipsoid shape, a rectangular parallelepiped shape, or the like.

[0117] In the above embodiment, the solid discharge outlet 32 ​​and the liquid discharge outlet 40 are formed to face in opposite directions. However, they may be formed to face in the same direction or to face in directions intersecting each other in a plan view. In the latter case, in the container state change unit 22, two rotation centers for rotating the container 12 may be disposed to intersect each other in a plan view. When performing the filtration preparation step and the discharge step shown in FIG. 6, the container 12 may be rotated about one of the rotation centers so that the solid discharge outlet 32 ​​is positioned vertically below the container 12. When performing the filtration step shown in FIG. 6, the container 12 may be rotated about the other rotation center so that the liquid discharge outlet 40 and the filter unit 18 are positioned vertically below the container 12.

[0118] In the above embodiment, the axial through-hole 52, the inlet 54, the instrument mounting hole 56, the sight glass mounting holes 64a, 64b, and the pressurization hose connection holes 66a, 66b are formed in the upper wall portion 28 of the container 12, but at least one of these may be omitted or may be formed in the peripheral wall portion 26.

[0119] Furthermore, holes, recesses or protrusions having functions different from those of the shaft through-hole 52, the input port 54, the instrument mounting hole 56, the sight glass mounting holes 64a, 64b and the pressurizing hose connection holes 66a, 66b may be formed in the upper wall portion 28 or the peripheral wall portion 26, or may be formed in a member configured inside the storage space S. Even in these cases, by ensuring a clean area Q in the area where the holes, recesses or protrusions are located, it is possible to prevent adverse effects caused by the workpiece W adhering to the holes, recesses or protrusions.

[0120] In the above embodiment, the shaft through hole 52, through which the drive shaft 116 of the agitator 20 is inserted, is formed in the upper wall portion 28 of the container 12. However, the shaft through hole 52 may be formed in a wall portion (not shown) that separates the interior of the storage space S. In other words, the wall portion of the container 12 in which the shaft through hole 52 is formed is not limited to the one that separates the interior and exterior of the storage space S, but may also be an internal wall that separates two regions within the storage space S. When the container 12 has an internal wall, the attachment surface 142 shown in FIG. 10(D) may include the surface of the internal wall. In this case, the internal wall and the peripheral wall portion 26 may be configured to be continuous in order to transfer heat to the attachment surface 142 of the internal wall.

[0121] Furthermore, instead of the agitator 20 of the above embodiment, an agitator that rotates the container 12 or an agitator that includes a gear box (power transmission unit) disposed in the storage space S may be used. Even when the shaft through hole 52 is formed in the inner wall portion or when the agitator includes a gear box, by ensuring a clean area Q in the area where the shaft through hole 52 or the gear box is located, it is possible to prevent adverse effects caused by the workpiece W adhering to the shaft through hole 52 or the gear box.

[0122] In the above embodiment, the first jacket 14 and the second jacket 16 as the "drying heating device" are provided on the peripheral wall portion 26 and the lower wall portion 30, but it is sufficient that at least a portion of the "drying heating device" is provided on the lower wall portion 30, and the first jacket 14 (drying heating device) provided on the peripheral wall portion 26 may be omitted.

[0123] In the above embodiment, the first jacket 14 and the second jacket 16 are used as heating means constituting the "heating device for peeling," but the type of heating means is not particularly limited, and for example, an electric heater, an electromagnetic induction heating device, or a microwave heating device may be used. Furthermore, two or more of these may be used in combination, or at least one of these may be used in combination with a jacket.

[0124] Fig. 12 is a partial cross-sectional view showing the configuration of a filtration and drying device 144 according to another embodiment. The container 12 shown in Fig. 12 is in a peeling state for carrying out the peeling step.

[0125] 12 includes a microwave generator 146 as a heating means, a microwave irradiation window 148 provided in the upper wall portion 28 of the container 12, and a waveguide 150 for guiding the microwaves generated by the microwave generator 146 to the microwave irradiation window 148. The microwave generator 146 is a device that generates microwaves for dielectrically heating the solid matter W1 attached to the attachment surface 142.

[0126] When the peeling process is performed using this filtering / drying device 144, microwaves generated by a microwave generator 146 are irradiated toward the workpiece W through a microwave irradiation window 148. The workpiece W then vibrates and generates heat upon receiving the microwaves, and the contact area X of the solid material W1 is heated and dried, resulting in peeling from the attachment surface 142. This filtering / drying device 144 allows the entire solid material W1 attached to the attachment surface 142 (including the contact area) to be quickly heated by dielectric heating, thereby shortening the time required to peel the solid material. Furthermore, because there is no need to heat the walls of the container 12 (the peripheral wall 26 and the lower wall 30), the "internal heating device" consisting of the first jacket 14 and the second jacket 16 can be omitted.

[0127] (Modification of filtration and drying method) The present invention is not limited to the filtration and drying method of the above embodiment, and various modifications are possible without departing from the scope of the present invention. In other words, in the above embodiment, "cooling crystallization" is used as the crystallization step shown in FIG. 6 , in which a solid is precipitated by cooling the workpiece W. However, instead of this, "evaporative crystallization" may be used, in which a solid is precipitated by heating the workpiece W and evaporating a liquid. Furthermore, "vacuum crystallization" may be used, in which a solid is precipitated by depressurizing the storage space S and evaporating a liquid. When "vacuum crystallization" is used, the gas in the storage space S may be sucked under negative pressure through the discharge pipe connection hole 46, or may be sucked under negative pressure through another hole with the discharge pipe connection hole 46 closed.

[0128] In the above embodiment, the dissolving step and the crystallization step shown in Fig. 6 are performed in the container 12 in a state of preparation for filtration, but the dissolving step may be performed outside the container 12. In this case, the dissolving step shown in Fig. 6 may be omitted, and a solution prepared by dissolving the solid matter of the workpiece W in a liquid matter may be introduced into the storage space S in the introduction step.

[0129] The dissolving step may also be performed in the container 12 in the loaded state or in another state. When the dissolving step is performed in the container 12 in the loaded state, the material to be treated W adheres to the filter portion 18, but in the dissolving step, the solid matter of the material to be treated W is dissolved in the liquid matter, so that adverse effects are unlikely to occur.

[0130] 6 is performed in the container 12 in the loading state, but the loading step may also be performed in the container 12 in the filtration preparation state or in another state. When the loading step is performed in the container 12 in the filtration preparation state, there is no need to switch the state of the container 12 when transitioning to the filtration preparation step, and therefore the transition can be made smoothly.

[0131] In the above embodiment, the filtration preparation step shown in Fig. 6 includes a dissolving step and a crystallization step, but in the filtration preparation step, the workpiece W containing solid matter may be prepared in the filtration preparation region M from the beginning. In other words, the crystallization reaction step including the dissolving step and the crystallization step may be omitted. Also, the workpiece W containing solid matter from the beginning may be prepared in the storage space S of the container 12 in the loaded state. In this case, the loading step simultaneously becomes the filtration preparation step.

[0132] FIG. 13(A) is a diagram showing a first modified example of the peeling step. In the above embodiment, the drying step is performed after the peeling step shown in FIG. 6. However, as shown in FIG. 13(A), the peeling step and the drying step may be performed partially in parallel. That is, the drying step may start after the start of the peeling step, and the end of the drying step may be later than the end of the peeling step or may be the same as the end of the peeling step. That is, even during the drying step, solid matter W1 adhering to the adhesion surface 142 may remain. Therefore, the peeling step may be continued to peel the solid matter W1 from the adhesion surface 142 in a stationary state where the agitation force of the agitator blade 118 does not reach the solid matter W1. In this case, the peeling step performed in parallel with the drying step may be performed in the container 12 in a dry state.

[0133] Fig. 13(B) is a diagram showing a second modified example of the peeling step. In the above embodiment, the peeling step shown in Fig. 6 is performed with the container 12 in the peeled state, but as shown in Fig. 13(B), the peeling step may also be performed with the container 12 in a state where the drying region N is not secured in the region vertically below the filter portion 18 (for example, the same state as the loaded state). Even in this case, the contact region X on the surface of the solid matter W1 can be heated and dried to peel the solid matter W1 from the attachment surface 142, thereby allowing the drying step to be started smoothly. [Explanation of symbols]

[0134] L...shaft, Q...clean area, S...storage space, M...filtration preparation area, N...drying area, W...object to be treated, W1...solid matter, X...contact area, 10...filtration drying device, 12...container, 14...first jacket, 16...second jacket, 18...filter section, 20...agitator, 22...container state change section, 24...control section, 26...peripheral wall section, 28...upper wall section, 30...lower wall section, 32...solid matter discharge port, 34...first discharge nozzle, 34a...flange, 36...first lid section, 36a...lid plate section, 36b...core, 38...first clamp, 40... Liquid discharge port, 42...second discharge nozzle, 42a...flange, 42b...projection, 44...second lid portion, 44a...lid plate portion, 46...discharge pipe connection hole, 48...second clamp, 50...discharge pipe, 52...shaft through hole, 54...inlet, 56...meter mounting hole, 58...nozzle, 60...lid portion, 62...meter, 64a, 64b...sight window mounting hole, 66a, 66b...pressurization hose connection hole, 68a, 68b...sight window, 70a, 70b...pressurization hose, 72...opening / closing valve, 74...gas source, 76...jacket body, 78...first heat medium flow path, 8 0a...heat medium inlet, 80b...heat medium outlet, 82a...first heat medium supply pipe, 82b...first heat medium discharge pipe, 84...pump, 84a...discharge port, 84b...suction port, 86...on / off valve, 88...hot water source, 90...on / off valve, 92...cold water source, 94...jacket body, 96...second heat medium flow path, 98a...heat medium inlet, 98b...heat medium outlet, 100a...second heat medium supply pipe, 100b...second heat medium discharge pipe, 102...opening, 104...filter cloth, 106...support, 108...filter plate portion, 108a...through hole, 110...clamping portion, 112...groove , 114...O-ring, 116...drive shaft, 118...mixing blade, 118a...fixing part, 118b...blade member, 120...drive motor, 122...mounting base, 124a, 124b...frame, 126a, 126b...bearing part, 128a, 128b...rotating shaft, 130...rotating operation part, 132...base, 134...support, 136...gear unit, 138...drive motor, 140...manual handle, 142...surface to be adhered, 144...filtration drying device, 146...microwave generator, 148...window for microwave irradiation, 150...waveguide.

Claims

1. a filtration preparation step of preparing a treatment object containing solid matter and liquid matter in an accommodation space of a container; a filtering step of filtering the object to be treated using a filter unit provided in the container; a peeling step of peeling the solid matter captured by the filter unit and attached to a target surface including the inner surface of the filter unit and the container from the target surface while the solid matter is left stationary; a drying step that starts after the start of the peeling step and heats and dries the solid matter peeled off from the attachment surface while stirring, The filtration and drying method, wherein the peeling step includes a step of heating and drying a contact area of ​​the surface of the solid object that has come into contact with the surface to be adhered.

2. The filtration and drying method according to claim 1 , wherein the peeling step includes a step of heating and drying the contact area that is in contact with the inner surface of the container.

3. The filtration and drying method according to claim 2 , wherein the peeling step includes an inner surface heating step of heating the inner surface of the container, which serves as the attachment surface, by heating the wall portion of the container from the outer surface side of the container.

4. a peeling and holding step of holding the container in a peeled state in which at least a portion of a drying area for accommodating the solid matter during the drying step is secured in a region vertically below the filter portion in the accommodation space, The filtration and drying method according to claim 1 , wherein the peeling step is performed with the container in the peeled state.

5. a container having a storage space for storing a material to be treated, the material including a solid and a liquid; a filter section provided in the container for filtering the material to be treated; a peeling means for peeling the solid matter captured by the filter and attached to a receiving surface including the inner surface of the filter and the container from the receiving surface in a stationary state; a heating and drying means for heating and drying the solid matter peeled off from the surface to be adhered, the peeling means has a peeling heating device for heating a contact area of ​​the surface of the solid matter adhered to the attachment surface, the contact area coming into contact with the attachment surface, The heating and drying means of the filtration and drying apparatus includes a stirring device for stirring the solid material peeled off from the surface to be adhered, and a drying heating device for heating the solid material stirred by the stirring device.

6. The filtration and drying apparatus according to claim 5, wherein the peeling heating device has an inner surface heating device configured to heat the inner surface of the container, which becomes the surface to be adhered, by heating the wall portion of the container from the outer surface side of the container.

7. 6. The filtering and drying apparatus according to claim 5, wherein the heating device for peeling has a microwave generator that generates microwaves for dielectrically heating the solid matter adhering to the attachment surface.

8. a solid matter discharge port provided in the container for discharging the heated and dried solid matter to the outside of the storage space; a container state change unit for changing the state of the container; The container has a cylindrical peripheral wall portion extending in the vertical direction, an upper wall portion provided at an upper end of the peripheral wall portion so as to close an upper opening, and a lower wall portion provided at a lower end of the peripheral wall portion so as to close a lower opening, the filter portion and the solid discharge port are provided on the peripheral wall portion, At least a part of the drying heater is provided in the lower wall portion, When the container is in a filtering state for performing a filtering step, the filter unit is disposed in a vertically lower portion of the container, When the container is in a peeling state for performing a peeling step, the lower wall portion is disposed vertically below the filter portion, When the container is in a dry state for performing a drying step, the lower wall portion is disposed at a vertically lower portion of the container, and a dry region for accommodating the solid material is secured in a vertically lower region of the accommodation space, 8. The filtering and drying apparatus according to claim 5, wherein the solid discharge port is disposed vertically below the container when the container is in a discharge state for carrying out the discharge step.

9. 9. The filtering and drying apparatus according to claim 8, wherein the agitator comprises an agitator blade disposed in the drying area and a drive shaft inserted into a shaft through-hole formed in the upper wall portion.

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