JP3215202B2 - Filtration and drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration / drying apparatus used for filtering and drying a slurry stock solution in a manufacturing process of pharmaceuticals and the like.

[0002]

2. Description of the Related Art A specific example of the above-mentioned filtration and drying apparatus is described in, for example, Japanese Patent Application Laid-Open No. 61-21708. In the apparatus, as shown in FIG. 9, a filter plate 72 is provided on the bottom side of a filter device main body 71, and a slurry-like stock solution injected from the top of the main body 71 is filtered by the filter plate 72. The filtrate is supplied to the bottom plate 7 covering the lower side of the main body 71.
The liquid is discharged to the outside of the main body 71 through a liquid drain pipe 74 provided in the apparatus 3.

[0003] The cake on the filter plate 72 generated by the above-described filtration process is then washed with a washing liquid sprayed from the upper portion of the main body 71 in a shower shape.
The drying is performed by supplying the drying gas into the main body 71. The dried cake is raked down at the center of the main body 71 by rotating and lowering the stirring blades 75 provided in the main body 71, and the filter plate 72 and the bottom plate 7 are collected.
3 is collected to the outside through a cake discharge pipe 76 extending downward through the central portion. In the cake discharge pipe 76, the valve is maintained in a closed state during the filtration / drying process,
An on-off valve 77 that is opened at the time of recovery is provided.

By the way, in the structure in which the cake discharge pipe 76 is provided at the center of the filter plate 72 as described above, this portion cannot be formed as a filtration region, and the effective filtration area is reduced by that amount, and the filtration efficiency is reduced. . For this reason, as shown in FIG. 10, for example, a filtration / drying apparatus having a structure in which a cake discharge port 83 covered with a detachable sealing lid 82 is provided on a side portion of a main body 81 is conventionally known. In such a device, it is possible to provide a filter plate 85 on the bottom plate 84, which is almost equivalent to the entire cross section inside the main body 81, so that a wide filtration area can be obtained and the filtration efficiency is improved.

[0005] In the above-described apparatus, when the undiluted solution is injected into the main body 81 and filtration and drying are performed in substantially the same manner as in the above-described conventional example, the sealing lid 82 is removed and the cake collection chute (not shown) is removed. It is attached to the cake outlet 83. Then, the cake deposited on the filter plate 85 is scraped to the side by lowering while rotating the stirring blade 86, whereby the cake passes through the cake outlet 83 to the above-mentioned cake collecting chute. Discharged and collected.

[0006]

However, in the above-mentioned apparatus, since much time and labor is required for attaching and detaching the cake collecting chute, which is performed every time filtration and drying are completed, sufficient productivity is obtained. There is a problem that it cannot be obtained. Further, when the sealing lid 82 is removed, dust in the surrounding atmosphere flows into the main body 81, or the inside of the cake collection chute has the same atmosphere.
There is also the problem that the cleanliness of the cake is reduced, which makes it impossible to obtain a highly pure product. In particular, even if the entire apparatus is provided in, for example, a clean room, since the attachment and detachment of the cake collection chute is performed manually by a source of dust, the cleanliness cannot be sufficiently improved. Has become.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a filtration / drying apparatus capable of improving cleanliness and improving productivity. It is in.

[0008]

According to a first aspect of the present invention, there is provided a filtration and drying apparatus comprising: a filter plate provided in a substantially hermetically sealed main body; A filter drying device comprising a cake discharge port penetrating the body wall of the main body so as to discharge the cake generated on the filter plate to the side of the main body by performing filtration of the undiluted solution, A cake collection chute for covering the cake discharge port from the side and collecting cake discharged from the main body through the cake discharge port is provided. The cake collection chute has a lid for opening and closing the cake discharge port. An opening / closing lid driven by the driving means is provided, and an injection nozzle for injecting a sterilizing liquid and a drying gas for sterilizing and washing and drying the inside of the cake collection chute is provided in the cake collection chute. It is characterized in that it is.

According to a second aspect of the present invention, there is provided the filtration / drying apparatus according to the first aspect, wherein the lid driving means has a shaft connected to the opening / closing lid through the inside of the cake collecting chute. Is characterized in that a cover member made of a stretchable and corrosion-resistant material surrounding the shaft portion is provided in a region where the shaft portion reciprocates in the cake collection chute.

According to a third aspect of the present invention, there is provided the filtration and drying apparatus according to the second aspect, wherein the cake discharge port is provided with a tapered valve seat surface whose diameter becomes larger toward the cake recovery chute. A tapered valve portion is provided on the tip end side of the lid so that when the opening / closing lid is pushed toward the main body by the driving means, the lid is in close contact with the valve seat surface over the entire circumference to close the cake discharge port. It is characterized by having.

According to a fourth aspect of the present invention, there is provided the filtration and drying apparatus according to the third aspect, wherein the drying gas is supplied to a gap between the cake discharge opening and the opening / closing lid which is generated when the opening / closing lid approaches the cake discharge opening. It is characterized in that a gas blow means for ejecting and detaching the adhered powder is provided.

[0012]

According to the first aspect of the present invention, there is provided a filtration and drying apparatus.
With the cake collection chute provided on the side of the main body, which is always connected to the main body, and by opening and closing the lid, the filtration and drying of the undiluted solution and the subsequent collection of the cake can be repeated. Therefore, the productivity is improved and the process from filtration and drying to the collection of the cake can be performed in a closed system that is isolated from the surrounding atmosphere, resulting in contamination of dust from the surrounding atmosphere. Instead, a higher purity product can be produced.

Further, in the above, the cake collecting chute is provided with an injection nozzle for injecting a sterilizing liquid and a drying gas for sterilizing the inside of the cake collecting chute and drying the inside thereof. Sterilization for maintaining a high state can also be performed without removing the main body from the main body.As a result, the time required for sterilization of the cake collection chute is shortened, and a decrease in the operation rate is suppressed. Also, productivity can be improved.

[0014] In the filtration and drying apparatus according to the second aspect,
Since the shaft of the driving means is surrounded by a cover member made of a stretchable and corrosion-resistant material in the cake collecting chute,
Dust, lubricating oil and the like generated from the surface of the reciprocating shaft do not scatter in the cake collecting chute, thereby maintaining high purity of the cake collected in the cake collecting chute. Can be.

[0015] In the filtration and drying apparatus according to the third aspect,
When the valve portion of the opening / closing lid comes into contact with the tapered valve seat surface of the cake discharge port over the entire circumference, the cake discharge port is closed to hermetically close the main body. When such an opening / closing portion is sealed with, for example, an O-ring, it is necessary to provide an O-ring groove into which the O-ring is fitted. The remaining cake, sterilized liquid, etc. remain and deteriorate over time to lower the cleanliness. On the other hand, by performing sealing at the tapered surface contact as described above,
Since there is no need to provide a concave groove or the like, a high cleanliness can be maintained.

[0016] In the filtration and drying apparatus according to claim 4,
When the opening / closing lid approaches the cake outlet, the drying gas injected from the gas blowing means spirals over the entire circumference along a tapered gap between the outer peripheral surface of the opening / closing lid and the inner peripheral surface of the cake outlet. Will flow into the main body in the shape of a circle. By this gas flow, if powder adheres to the tapered sealing surfaces of the valve seat surface of the cake discharge port and the valve portion of the opening / closing lid, the powder is removed and sent into the main body. As a result, it is possible to reliably maintain the sealing property at the close contact surface between the valve portion and the valve seat surface in the closed state thereafter. As a result, a decrease in the operation rate caused by stopping the operation due to a defective seal is suppressed, so that the productivity can also be improved.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 3, the filtration and drying apparatus of this embodiment includes a main body 1 for filtering and drying a slurry stock solution and a cake collecting chute for collecting cake discharged from the main body 1 after filtration and drying. (Hereinafter, abbreviated as a chute) 2.

The main body 1 is provided with a bell jar-shaped main body wall portion 3 in which a cylindrical main body body plate 3a and an upper end plate 3b are integrally connected. ,
A bottom plate 4 that covers the opening from below is attached. A jacket body plate 3c is provided concentrically outside the body body plate 3a except for the mounting portion of the chute 2, and the body 1 is provided between the jacket body plate 3c and the body body plate 3a.
When it is necessary to maintain the inside at a predetermined temperature, a heating or cooling medium circulation flow path 3 through which a heating or cooling medium is circulated.
d is formed. The lower end of the main body wall 3 is
The bottom plate 4 is formed as a ring-shaped bottom plate mounting portion 5 to be screwed from below, and the lower end of the main body plate 3a is provided on the inner peripheral side of the upper surface of the bottom plate mounting portion 5, and the jacket body plate is provided on the outer peripheral side of the upper surface. The lower ends of 3c are joined.

A substantially disk-shaped filter plate 6 is horizontally mounted on the bottom side of the main body 1, and a stirring blade 7 is disposed above the filter plate 6. The stirring blade 7 is attached to a lower end of a stirring shaft 7a vertically penetrating the center of the upper head plate 3b. The stirring shaft 7a is supported by a stirring blade driving unit 8 provided above the upper head plate 3b. Have been.

The stirring blade driving unit 8 covered with the driving unit cover 9 has a stirring shaft 7a rotatable and vertically movable while maintaining the airtightness in the main body 1 at a position close to the upper head plate 3b. Is provided with a mechanical seal portion 8a for supporting
In addition, a stirring shaft 7 is provided above the mechanical seal portion 8a.
a is provided with a hydraulic motor 8b for rotationally driving a. Further, as shown in FIG. 4, hydraulic blade cylinders 8c, 8c for stirring blades for vertically moving the stirring shaft 7a are provided, and by operating these hydraulic cylinders 8c, 8c,
As shown in FIG. 3, the stirring blade 7 moves up and down between a lower limit position close to the upper surface of the filter plate 6 from above and an upper position indicated by a two-dot chain line in the figure. In order to prevent the lubricating oil, dust and the like from being scattered into the main body 1 from the stirring shaft 7a which is rotated and moved up and down while sliding in the stirring blade driving section 8, the stirring blade driving section in the main body 1 is used. 8 and the stirring blade 7
A bellows 7b is provided to extend and retract around the stirring shaft 7a. The bellows 7b is made of a heat and corrosion resistant material such as stainless steel.

As shown in FIG. 5, a stock solution supply pipe 11, a drying gas supply pipe 12, cleaning liquid supply pipes 13, and a steam supply pipe 14 are attached to the upper end plate 3b around the drive section cover 9. Through these, a slurry-like undiluted solution, a drying gas such as nitrogen gas or air, a cleaning liquid, and pure steam for sterilizing the inside of the main body 1 are supplied into the main body 1 respectively. In addition, the upper end plate 3b includes
Upper viewing window 15 for viewing the inside of main body 1 from above
Etc. are further provided.

On the other hand, a supply pipe 16a and a discharge pipe 16 for externally circulating a heating or cooling medium through the heating or cooling medium circulating passage 3d are provided on the outer surface of the jacket body plate 3c.
b, and two mounting arms 17 are attached to opposing portions in such a manner as to extend horizontally horizontally. As shown in FIG. 4, column-shaped main body legs 18 extending downward as shown in FIG. 4 are respectively connected to the distal ends of the installation arms 17 so that the main body 1 is at a predetermined height from the installation floor surface. Held in a raised position.

As shown in FIGS. 6 (a) and 6 (b), the filter plate 6 disposed on the bottom side in the main body 1 has a ring-shaped filter plate ring member (filter material support member) 21. It is formed with a structure in which a thin filter material 22 is stretched so as to cover the upper opening. Further, inside the filter plate ring body 21, ribs 23 for supporting the filter medium 22 from below are provided in a lattice shape.

The filter medium 22 is made of a porous material having an average pore diameter of about 5 μm, for example, a sintered body of stainless steel (SUS316), and is formed in a thin plate having a thickness of about 2 mm. On the other hand, as shown in FIG. 7, on the upper surface of the filter plate ring body 21, there is formed a filter material mounting surface 21a having a shape recessed downward while slightly leaving the outer peripheral side. The filter medium 22 has a state in which the outer peripheral side is fitted into the filter medium mounting surface 21a from above,
The outer peripheral end is joined to the filter plate ring body 21 by welding, and the filter medium 22 is finished so that the upper end surface on the outer peripheral side of the filter plate ring body 21 is flush.

In the above structure, a surface area of the filter medium 22 inside the inner peripheral surface of the filter plate ring 21 is a filtration area through which liquid can flow downward from above through the filter medium 22. And in the above, the filter plate ring body 21
In order to form a filtration area on the lower surface of the filter medium 22, a filter area forming groove is further recessed on the filter medium mounting surface 21a so that a filter area is formed outside the inner peripheral surface of the filter medium. 2
1b, and a filtrate recovery groove 21c extending from the filtration area forming groove 21b to the inner peripheral surface of the filter plate ring body 21 is formed. The bottom surfaces of the grooves 21b and 21c are formed in a shape integrally connected and inclined downward inward. As shown in FIG. 6 (a), the filtration area forming groove 21b is formed in a circular shape over the entire circumference of the filter plate ring body 21, and the filtrate recovery grooves 21c. They are provided radially at intervals.

The outer peripheral side of the upper surface of the filter plate ring 21 is
As shown in FIG. 7, a tapered surface 21d having a taper angle of about 45 ° is formed, and the pressed surface 21d is provided with an O-ring groove 21e in an annular shape. on the other hand,
As shown in FIG. 6 (a), a filter plate mounting screw hole 2 drilled upward is formed on the lower end surface of the filter plate ring body 21.
Are formed at appropriate intervals in the circumferential direction.

As shown in FIG. 3, the bottom plate 4 has an annular bottom plate ring 24 on the outer peripheral side thereof.
4, a lower end plate surface 25 whose center side is curved downward.
Are formed continuously. A filtrate discharge pipe 26 communicating with the inside of the main body 1 and extending downward is provided at a central portion of the lower end plate surface 25, and around the filtrate discharge tube 26 on the lower surface of the lower end plate surface 25, At the lower end, four bottom plate legs 27 each having casters 27a are attached.

The bottom plate 4 having the above-mentioned shape is attached to the bottom plate attaching portion 5 at the lower end of the main body body wall portion 3 from below with the filter plate 6 placed on the upper surface thereof. The structure will be described with reference to FIG.

As shown in the figure, the inner peripheral surface of the bottom plate mounting portion 5 is located at the lower end of the inner peripheral surface of the main body plate 3a.
A two-step taper surface of a downwardly expanding shape, that is, a two-step taper surface of a taper pressing surface 5a having a taper angle of about 45 ° and a taper fitting surface 5b having a taper angle of about 3 ° are sequentially formed. It is formed in a continuous shape. The lower end of the main body body plate 3a is welded to the inner peripheral side of the upper end of the bottom plate mounting portion 5, so that the welding joint strength is not reduced by the taper processing for forming the tapered pressing surface 5a. The tapered pressing surface 5a is provided at a position slightly lower than the welding line of the main body body plate 3a to the bottom plate mounting portion 5. As a result, the upper end of the tapered pressing surface 5a has a shape protruding slightly toward the center from the inner peripheral surface of the main body plate 3a as an inward projection 5c.

On the other hand, the bottom plate ring body 24 of the bottom plate 4 is
A filter plate mounting portion 24a having a substantially rectangular cross-sectional shape, and a flange portion 2 extending radially outward at a lower end side of the filter plate mounting portion 24a.
4b. Filter plate mounting part 2
4a has an inner and outer diameter corresponding to the filter plate ring body 21. Therefore, the filter plate 6
The filter plate mounting screw 28 is placed on the upper surface of the filter plate mounting portion 24a, and the distal end portion of the filter plate fastening screw 28 inserted from below the filter plate mounting portion 24a is screwed into the filter plate mounting screw hole 21f of the filter plate ring body 21. Thereby, it is fixed on the bottom plate 4.

The bottom plate 4 to which the filter plate 6 is fixed as described above
Is a bottom plate fastening screw 29 which is inserted through the flange portion 24b with the filter plate mounting portion 24a fitted from below into the tapered fitting surface 5b of the bottom plate mounting portion 5 of the main body wall portion 3.
Thereby, it is fastened and fixed to the lower end surface of the bottom plate mounting portion 5.
In this fixed state, the pressed surface 21d on the upper surface outer peripheral side of the filter plate 6 is in close contact with the tapered pressing surface 5a of the bottom plate mounting portion 5 from below, and the pressed surface 21d is lower than the tapered pressing surface 5a. The shape of the filter plate ring body 21 of the filter plate 6 and the shape of the bottom plate ring body 24 of the bottom plate 4 with respect to the vertical dimension of the bottom plate mounting portion 5 are set so that the pressing force in the direction acts. In this state, the upper surface of the filter plate 6 is set so as to be flush with the upper surface of the inward projection 5c at the upper end of the bottom plate mounting portion 5.

As shown in FIG. 5, four bottom plate elevating cylinders 44 are attached to the outer periphery of the main body wall 3 in the vertical direction. As shown in FIG. 3, a main body 1 is provided at each lower end of the bottom plate lifting cylinders 44.
, Each of which is directed toward the center of the bottom plate, is mounted on the bottom plate support 44a.
Is placed. As a result, the bottom plate fastening screw 2
By operating the bottom plate elevating cylinders 44... In a state in which the bottom plate 9 is removed, the bottom plate 4 is lowered from the position of fastening to the lower end of the main body wall 3.

On the other hand, as shown in FIG. 1, a cake opening 31 having a circular opening shape is formed in the main body wall 3 so as to penetrate the bottom wall of the main body wall 3 in the horizontal direction. Have been. The cake outlet 31 is provided at a position where the lower edge thereof is flush with the upper surface of the filter plate 6. And
The chute casing 32 of the chute 2 is attached to the main body plate 3a so as to cover the cake discharge port 31 from the side. The inside of the chute casing 32 is formed as a cake collection chamber 33 communicating with the inside of the main body 1 through the cake discharge port 31, and a cake outlet 32 a is provided at a lower end of the chute casing 32. A cap 34 functioning as a blind lid is attached to the cake outlet 32a at times other than when the cake is removed.

A lid opening / closing unit casing 35 is further attached to the chute casing 32 at a position on the side opposite to the cake discharge port 31. In the lid opening / closing unit casing 35, as shown in FIG. A lid opening / closing hydraulic cylinder (lid driving means) 36 is provided in the portion, and guide rods 37 are provided on both sides of the lid opening / closing hydraulic cylinder 36.
Are provided respectively.

The guide rods 37, 37 and a cylinder rod (shaft) 36a of the lid opening / closing hydraulic cylinder 36 shown in FIG.
Means extending through the chute casing 32 to the inside of the cake collection chamber 33 toward the main body 1,
An opening / closing lid 38 for opening / closing the cake discharge port 31 is attached. The opening / closing lid 38 is driven horizontally by the lid opening / closing hydraulic cylinder 36 in the cake collecting chamber 33 in a direction of coming and going with respect to the cake discharge port 31. Note that the cylinder rod 36a and the guide rods 37 of the lid opening / closing hydraulic cylinder 36 are connected to the opening / closing lid 38 and the chute casing 32.
Bellows (cover member) 36b made of a heat-resistant and corrosion-resistant material such as a stretchable stainless steel plate installed between
37a and 37a (see FIG. 2).
Thus, the surface of the cylinder rod 36a and the surfaces of the guide rods 37 are not exposed in the cake recovery chamber 33.

As shown in FIG. 1, a tapered valve portion 38a is provided on the main body 1 side of the opening / closing lid 38 so that the diameter becomes smaller toward the main body 1 side. The cake discharge port 31 is formed on the main body 1 side with a tapered valve seat surface 31a in which the distal end side of the valve portion 38a is fitted over the entire circumference. Thereby, the lid opening / closing hydraulic cylinder 36 is operated to advance the opening / closing lid 38, and the valve portion 38a is moved to the valve seat surface 31a.
, The cake discharge port 31 is closed. Note that, for example, PFA (Tetrafluoroethylen
e-perfluoroalkylether copolymer) lining 38b is provided, whereby the valve portion 38a and the valve seat surface 31 are provided.
In addition to maintaining good sealing performance in the state of contact with the surface a, the powder attached to the surface of the opening / closing lid 38 can be easily removed.

The valve seat surface 3 at the cake discharge port 31
The cake collection chamber 33 side than 1a is formed as a tapered separation portion 31b slightly larger in diameter than the valve portion 38a,
It opens to the cake collection chamber 33 side. Thereby, the lower edge of the cake discharge port 31 has a shape that is entirely inclined downward from the inner peripheral surface side of the main body 1 toward the cake collection chamber 33 side. In the closed state, the separation portion 31b
Has a shape slightly separated from the outer peripheral surface of the opening / closing lid 38, and an outlet port of an outlet blow pipe (gas blowing means) 39 for guiding air or steam from outside and jetting the air into the separated portion 31b. Is open.

On the other hand, as shown in FIG. 2, on the inner peripheral surface of the chute casing 32, a central lid opening / closing hydraulic cylinder 3 is provided.
The blow nozzle (injection nozzle) 41 in the chute whose injection direction is adjustable so as to surround the cylinder rod 36a, etc.
Are provided, for example, five chute casings 3
When air is supplied to the injection gas introduction pipe 42 provided on the outer surface of the chute 2, the air is guided to the blow nozzles 41 in each chute through a gas guide path 43 (see FIG. 1) along the outer surface of the chute casing 32. Are sprayed into the chute casing 32 from these nozzles 41.

In the filtration / drying apparatus having the above configuration, first,
An operation state in the filtration drying process will be described. When performing this process, as shown in FIG. 3, the bottom plate 4 on which the filter plate 6 is mounted is fixed to the bottom of the main body wall 3, and the opening / closing lid 38 of the chute 2 is positioned at the forward position. Then, the cake discharge port 31 is closed. On the other hand, the stirring blade 7 is located at an upper position indicated by a two-dot chain line in the figure.

In this state, when a predetermined amount of a slurry-like stock solution is injected into the main body 1 through the stock solution supply pipe 11, this stock solution is filtered by the filter material 22. The filtrate flowing down through the filter medium 22 is supplied to the filtrate discharge pipe 2 of the bottom plate 4.
The liquid is discharged from the main body 1 through 6 and sent to a filtrate collection tank (not shown).

In this filtration, in addition to the region inside the inner peripheral surface of the filter plate ring body 21 in the filter medium 22 and the peripheral side on the filter plate ring body 21, the filtration is performed in the upper portion of the filtration region forming groove 21 b. Then, the filtrate flows to the space inside the inner peripheral surface of the filter plate ring body 21 through the filtration area forming groove 21b and the filtrate recovery groove 21c. As described above, the filtration is performed also in the region on the filter plate ring body 21 and the effective filtration area is widened, so that the filtration can be completed in a shorter time and efficient filtration is performed.

When the above-mentioned filtration process is substantially completed, a deposit of powder, a so-called cake, remains on the filter plate 6.
Then, the cleaning liquid subjected to the dust-free and aseptic treatment is supplied in a shower shape into the main body 1 through the cleaning liquid supply pipe 13,
Thereby, the cake is washed. Thereafter, a dust-free and sterile nitrogen gas or air heated to a predetermined temperature is supplied from above to the main body 1 through the drying gas supply pipe 12, and the cake and the filter material 2 on the filter plate 6 are supplied.
2 and is discharged from the filtrate discharge pipe 26 to the outside of the main body 1. By continuing this hot air blowing for a predetermined time, the cake is dried.

After the above-mentioned drying process is completed, the process proceeds to a process of collecting cake from the inside of the main body 1. At this time, the cap 34 is removed from the cake outlet 32a at the lower end of the chute 2,
Instead of the cap 34, the cake outlet 32a
For example, a collection bag made of a polyethylene sheet or the like is mounted. Then, the lid opening / closing hydraulic cylinder 36 is operated to retreat the opening / closing lid 38 and open the cake discharge port 31. At the same time, the rotation of the stirring blade 7 starts,
Lower gradually from the upper position. When the stirring blade 7 reaches the position of the cake on the filter plate 6, the cake is scraped laterally from its upper layer side, and thereby discharged through the cake discharge port 31 into the chute 2. The cake discharged into the chute 2 falls under its own weight in the chute casing 32 and is collected in the collection bag attached to the cake outlet 32a.

When the stirring blades 7 are lowered to the lower limit position and the collection of the cake in the main body 1 is completed, the inner surface of the chute casing 32 in the chute 2 and Dust-free and sterile air is injected through the above-described chute blow nozzle 41 in order to peel off the powder adhering to the outer surface of the opening / closing lid 38 and the bellows 36b / 37a. As a result, the powder separated from the surface of the chute casing 32 falls in the direction of the cake outlet 32a and is collected in the collection bag in the same manner as described above.

When the collection of the cake is completed, the opening / closing lid 38 is advanced to close the cake discharge port 31, and thereafter,
The processing from the injection of the undiluted solution into the main body 1 is repeated. In addition,
As described above, the lid 38 is advanced to move the
Air blow through the outlet blow pipe 39 is performed until immediately before the is closed. Due to the air flow at this time, in particular, the valve portion 38a and the cake discharge port 31
If powder adheres to each surface with the valve seat surface 31a, the powder is removed. In addition, as the opening / closing lid 38 approaches the valve closing state, the space between the gaps becomes narrower, so that the flow rate of the blow air becomes faster, so that the adhered powder can be more reliably removed. The sealing property at the contact surface between the valve portion 38a and the valve seat surface 31a is reliably maintained.

Before performing the above-mentioned filtration and drying treatment, pure steam is supplied into the main body 1 and the chute 2 through the steam supply pipe 14 and the blow nozzle 41 in the chute to sterilize the inside of the apparatus. Thereby, high cleanliness in the filter drying device is maintained.

As described above, in the above embodiment, the chute 2 having the opening / closing lid 38 for opening / closing the cake outlet 31 is attached to the cake discharge port 31.
When the filtration / drying process in the inside is completed, the opening / closing lid 38 is subsequently opened so that the cake can be collected from the main body 1. As a result, the workability has been greatly improved, and the productivity has been improved.In particular, since the filtration and drying processing to recovery are performed in a closed system that is not exposed to the external atmosphere, Thereby, a product with high cleanliness can be produced.

The above-mentioned chute 2 is provided with an in-chute blow nozzle 41 for injecting a pure steam and a cylinder rod 36 of a hydraulic cylinder 36 for opening and closing the lid.
Since the sliding parts in the cake recovery chamber 33 such as the a and the guide rod 37 are surrounded by the bellows 36b and 37a, the inside can be sterilized while being attached to the main body 1, As a result, workability such as sterilization can be greatly improved, and high cleanliness can be maintained. In addition, the time required for the sterilization process is shortened, and the operation rate is improved, thereby also improving the productivity.

Further, the closed state of the cake discharge port 31 is a structure in which the tapered valve portion 38a of the opening / closing lid 38 is brought into contact with the entire circumference, and in this case, the seal portion has an O-ring recess. There is no need to provide an entry groove or the like, and as a result, there is no contamination caused by cake or sterilizing solution remaining in the recessed portion, so that high cleanliness can be maintained.

After the cake is collected, the dry gas is sprayed through the outlet blow pipe 39 to remove the adhered powder, so that the sealing property can be maintained reliably. As a result, as a result, a decrease in the operation rate due to the stoppage of the operation due to the sealing failure is suppressed, so that the productivity can also be improved.

On the other hand, the filter plate 6 placed on the bottom plate 4
The filter plate ring body 21 has a tapered pressed surface 21d.
Is mounted in the main body 1 while being pressed between the tapered pressing surface 5 a of the main body wall 3 and the bottom plate 4. There is no gap between the outer peripheral surface and the peripheral surface. Therefore, the contamination caused by the residual liquid which has conventionally occurred in the fitting gap at this portion is eliminated, and the processing apparatus has a high cleanliness.

[0052]

As described above, in the filtration and drying apparatus according to the first aspect of the present invention, the filter plate is disposed in the substantially closed main body, and the filtration of the stock solution injected into the main body is performed. In order to discharge the cake generated on the filter plate to the side of the main body, a cake collecting chute is provided from the side to cover a cake discharge opening penetrating the body wall of the main body. An opening / closing lid driven by lid driving means is provided to open and close the outlet, and a spray nozzle for spraying a sterilizing liquid and a drying gas for sterilizing and washing and drying the inside of the cake collection chute is provided in the cake collection chute. This is the configuration provided.

With the above configuration, the cake collection chute is always connected to the main body, and by operating the above-mentioned opening / closing lid, the filtration and drying of the undiluted solution and the subsequent collection of the cake can be repeated. Therefore, while improving productivity, from filtration and drying to cake recovery,
Since the processing can be performed in a closed system that is isolated from the surrounding atmosphere, dust from the atmosphere does not enter, and thus a product with higher purity can be produced. Further, the cake collection chute is provided with an injection nozzle for injecting a sterilizing liquid and a drying gas for sterilizing, washing, and drying the inside thereof, so that the cleanliness in the cake collection chute is maintained at a high level. Sterilization can be performed without removing from the main body, as a result,
The time required for the sterilization of the cake collection chute is also shortened, and a decrease in the operation rate is suppressed.
There is an effect that productivity can be improved.

According to a second aspect of the present invention, there is provided the filtration and drying apparatus, wherein the lid driving means includes a shaft portion penetrating through the cake collecting chute and connected to the opening / closing lid, and the shaft portion reciprocates in the cake collecting chute. The region is provided with a cover member made of a stretchable and corrosion-resistant material surrounding the shaft portion.

As a result, dust and lubricating oil generated from the surface of the shaft reciprocating in the cake collecting chute are not scattered into the cake collecting chute, and as a result, are collected into the cake collecting chute. The effect is that the cake to be prepared can be maintained at a high purity.

According to a third aspect of the present invention, in the filter / drying device, a tapered valve seat surface having a diameter larger toward the cake collecting chute is provided at the cake discharge port, and the opening / closing lid is provided at a tip end of the opening / closing lid. When the driving means is pushed toward the main body by the driving means, a tapered valve portion is provided which comes into close contact with the valve seat surface over the entire circumference and closes the cake discharge port.

As a result, since the cake discharge port is sealed around the tapered surface with the opening / closing lid, there is no need to provide a concave groove or the like in this seal portion. Since the liquid is not contaminated, high cleanliness can be maintained.

According to a fourth aspect of the present invention, the filter and drying device injects a dry gas into a gap between the cake discharge port and the opening / closing lid, which is generated when the opening / closing lid approaches the cake discharge port, to peel off the adhered powder. Is provided with a gas blow means for the air.

As a result, powder adhering to the tapered sealing surfaces of the valve seat surface of the cake discharge port and the valve portion of the opening / closing lid is
It is removed by the drying gas injected from the gas blowing means. As a result, it is possible to reliably maintain the sealing property at the close contact surface between the valve portion and the valve seat surface in the closed state thereafter, and as a result, a reduction in the operation rate due to stopping the operation due to a defective seal is suppressed. Therefore, this also has the effect that productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a cake discharge port side in a filtration and drying apparatus according to one embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a cake discharge port side in the filtration and drying apparatus.

FIG. 3 is a longitudinal sectional view showing the overall configuration of the filtration and drying apparatus.

FIG. 4 is a partially cutaway side view of the filtration and drying apparatus.

FIG. 5 is a partially cutaway plan view of the filtration and drying apparatus.

FIGS. 6A and 6B show a filter plate incorporated in the filtration and drying apparatus, wherein FIG. 6A is a plan view and FIG. 6B is a longitudinal sectional view.

FIG. 7 is an enlarged sectional view showing a structure on an outer peripheral side of the filter plate.

FIG. 8 is a partial cross-sectional view showing an attachment structure of a bottom plate and a filter plate to a main body wall portion in the filtration and drying apparatus.

FIG. 9 is a longitudinal sectional view showing a conventional filtration and drying apparatus.

FIG. 10 is a partial cross-sectional view showing another conventional filtration and drying apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Chute (cake recovery chute) 3 Main body wall part 6 Filtration plate 31 Cake discharge port 31a Valve seat surface 36 Hydraulic cylinder for lid opening / closing (lid driving means) 36a Cylinder rod (shaft part) 36b Bellows (cover member) 38 Opening / closing lid 38a Valve 39 Outlet blow pipe (gas blow means) 41 Blow nozzle (injection nozzle) in chute

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification code FI B01D 29/04 520E 520Z 530D (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 29/01-29/075 B01D 29/94 C02F 11/12-11/16 F26B 5/12

Claims (4)

(57) [Claims] 1. A filter plate is provided in a substantially closed main body, and a cake formed on the filter plate is discharged to the side of the main body by filtering a stock solution injected into the main body.
What is claimed is: 1. A filtration / drying apparatus comprising a cake discharge port penetrating through a body wall of a main body, wherein the cake discharge port is covered from the side and the cake discharged from the main body through the cake discharge port is collected. A cake collecting chute is provided. The cake collecting chute is provided with an opening / closing lid driven by lid driving means to open and close the cake discharge port, and for sterilizing, washing, and drying the inside of the cake collecting chute. A filtration and drying apparatus, wherein an injection nozzle for injecting a sterilizing liquid and a drying gas is provided in the cake collection chute. 2. The apparatus according to claim 1, wherein said lid driving means includes a shaft portion penetrating through the cake collecting chute and connected to the opening / closing lid, and surrounds the shaft portion in a region where the shaft portion reciprocates in the cake collecting chute. The filtration and drying apparatus according to claim 1, further comprising a cover member made of a stretchable and corrosion-resistant material. 3. The cake discharge port is provided with a tapered valve seat surface whose diameter becomes larger toward the cake collection chute, and the opening / closing lid is moved to the main body side by the driving means at the tip end of the opening / closing lid. 3. The filtration / drying apparatus according to claim 2, further comprising a tapered valve portion which is brought into close contact with the valve seat surface over the entire periphery when pushed to close the cake discharge port. 4. A gas blow means for injecting a dry gas into a gap between the cake discharge port and the opening / closing lid, which is generated when the opening / closing lid approaches the cake discharge port, to peel off adhered powder. The filtration / drying apparatus according to claim 3, wherein: