JPH0710230Y2 - Freeze vacuum dryer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention freezes a material to be dried, sublimates water in a state of maintaining a normal vacuum degree, and condenses and collects it in a trap for drying. Among the freeze-vacuum drying devices to be used, the present invention relates to a freeze-vacuum drying device in which a drying chamber is provided in a cylindrical shape inside a trap chamber in which a trap is installed.

[Prior Art] Usually, the freeze-vacuum drying apparatus A of the above-described embodiment has a cooling surface a ... Also serving as a heating surface for supplying heat to the material to be freeze-dried, as shown in FIGS. 1 and 2. , A vertical cylindrical body 1 along a vertical plane, and a partition of a drying chamber b accommodating the vertical cylindrical body 2 is formed to collect water vapor sublimated from the material to be freeze-dried by heating. A trap (steam condensing device) 3 for keeping a vacuum is arranged on the peripheral surface of the vertical cylinder lock body 2 forming the partition wall of the drying chamber b, and the outer periphery thereof is surrounded by an outer cylinder-shaped machine wall 4, A trap chamber c is formed between the machine wall 4 and the vertical cylindrical body 2 forming the partition wall of the drying chamber.

The freeze-vacuum drying device A of this embodiment has the brine nozzles 20 and 21 provided in the vertical cylindrical body 2 which is a partition of the drying chamber b.
Thus, the antifreeze heat transfer fluid is circulated in the space between the inner peripheral surface of the vertical tubular body 2 and the outer peripheral surfaces of the many cylindrical bodies 1 ... The material liquid to be dried is supplied from a supply pipe 10 into a large number of cylinders 1 arranged in parallel with each other until it reaches a predetermined level, and is frozen on a cooling surface a that also serves as a heating surface of the inner wall surface of each cylinder 1. When the freezing progresses into a cylindrical shape, the unfrozen material liquid to be dried is dropped from the supply pipe 10 to leave a cylindrical frozen layer in the cylindrical body 1. In this state, the trap 3 is supplied with a supply port 30 and Evacuation that circulates the refrigerant liquid from a discharge port (not shown in the drawing), and connects the inner cylindrical drying chamber b and the trap chamber c that surrounds it to a vacuum exhaust pipe 40 provided on the machine wall 4. The normal vacuum degree is maintained by the operation of the system, and in this state, the outer peripheral surfaces of the vertical cylindrical body 2 and the cylindrical body 1 ... In the drying chamber b. By the antifreeze heat transfer medium fluid circulating in the space between the two, the frozen material to be dried is heated to the extent that it does not melt, sublimates water from the material to be dried, and it is condensed and collected in the trap 3. , The material to be dried is freeze-dried.

Then, when this freeze-drying is completed, the bottom lid 22 of the drying chamber b is opened by the operation of the opening / closing operation mechanism 23, and each cylindrical body 1 ...
The material to be dried, which has been dried inside, is dropped into a hopper 5 which is continuously provided below the drying chamber b, and is used to collect it from a lower port 50 thereof into a desired container h.

[Problems to be Solved by the Invention] By the way, the freeze-vacuum drying apparatus A of this embodiment has a drying chamber b.
By being installed in the inside of the trap chamber c formed in an outer cylinder shape, an advantage that the space occupied by the entire apparatus can be reduced is obtained, but the material to be dried after freeze-drying is taken out, When the material liquid to be dried is again poured into the cylindrical bodies 1 ... In the drying chamber b, and it is frozen and the freeze-drying is repeated, when it is continuously operated, the ice condensed in the trap 3 is thawed and eliminated. Since it is necessary to restore the function of the trap 3 in advance, it is necessary to wait for the injection and connection of the material to be dried while the ice condensing in the trap 3 is thawed. There is a problem of increasing loss.

The present invention has been made to solve this problem, and has a simple configuration, and injects a material liquid to be dried into each cylindrical body in a drying chamber arranged in an inner cylindrical shape in an outer cylindrical trap chamber. It is intended to provide a new means for allowing the freezing process to be carried out during the melting process of the ice condensing in the trap in the trap chamber, with the resulting humidification by steam being cut off. .

[Means for Solving the Problem] In the present invention, as a means for achieving this object, a cooling surface which also serves as a heating surface for supplying heat to the material to be freeze-dried is a vertical direction along the vertical surface. Many cylinders,
The partition walls can be stored in parallel in a drying chamber that has a vertical tubular shape, and the vapor that sublimes from the material to be dried can be condensed and collected on the outer periphery of the vertical cylindrical body, and the frozen ice layer can be melted and removed. In a freeze vacuum drying apparatus in which a trap is provided and the outer circumference of the trap is surrounded by an outer cylindrical machine wall that forms a trap chamber, the end of the opening on the upper end side of the vertical cylindrical body that forms the partition of the drying chamber A ring-shaped valve seat is installed on the edge, and a valve element of a size that only closes the opening is placed above and below the upper end opening of the vertical tubular body below the ceiling wall of the machine wall of the trap chamber. The present invention proposes a freeze-vacuum drying device which is movably provided and is provided with a valve which is brought into close contact with the valve seat when the valve body moves downward.

Example Next, an example will be described in detail with reference to the drawings. The reference numerals used in the drawings are the same as those of the conventional means for the components having the same effect.

FIG. 3 is a vertical side view of a freeze-vacuum drying apparatus A according to the present invention. In FIG. 3, 1 ... is a vertical cooling surface a that also serves as a heating surface for supplying heat to the material to be dried. A plurality of cylinders oriented in the direction, 2 is a vertical tubular body forming a drying chamber b for accommodating them, 3 is a trap arranged on the peripheral surface of the vertical tubular body 2, 4 is the trap An outer cylindrical machine wall that surrounds the outer periphery of 3 together with the vertical cylinder lock body 2 that forms the drying chamber b to form a trap chamber c, and 10 denotes a large number of cylindrical bodies 1 arranged in parallel in the drying chamber b. A supply pipe for supplying a liquid material to be dried, 20 and 21 are antifreezing heat in a space formed between the inner peripheral surface of the vertical cylindrical body 2 and the outer peripheral surfaces of a large number of cylindrical bodies 1 ... A brine nozzle for circulating a medium fluid, 22 is a drying chamber b
Bottom lid, 23 is an opening / closing mechanism of the bottom lid 22, 30 is a supply port and a discharge port (not shown in the drawing) for switching the refrigerant and the heat medium to the trap 3 for circulation, and 40 is a vacuum exhaust system. A vacuum exhaust pipe communicating with the above, 5 is a hopper, 50 is a lower opening of the hopper 5, and h is a container, and these are the same as those of the conventional means. The supply pipe 10 for supplying the liquid material to be dried into the inside of the cylindrical body 1 forms an ice film on the cooling surface a which also serves as the heating surface of the cylindrical body 1 before supplying the liquid material to be dried. In order to cope with the case of being formed (when the material to be dried to be frozen tends to adhere to the cooling surface a which also serves as the heating surface), it is connected to the water supply pipe in a switchable manner, and the upper surface side of the bottom lid 22 is connected. Is provided with a support 22a for supporting the frozen material to be dried.

Further, w is a valve seat provided in the opening 2a on the upper end side of the vertical tubular body 2, and 6 is a valve body suspended from the lower surface of the ceiling wall 4a of the machine wall 4 of the trap chamber c.

The valve seat w is a normal seal member formed by attaching a normal seal material in a ring shape to the edge of the opening 2a on the upper end side of the vertical cylindrical body 2. The valve seat w is made of a metal material in the form of an annular seat and is attached to the edge of the opening 2a.
There is a case where it is provided in the valve and is configured as the valve y.

The valve body 6 is formed in a plate shape having a size that closes only the opening 2a on the upper end side of the vertical tubular body 2, and the center of the valve body 6 is located above the opening 2a on the upper end side of the vertical tubular body 2. The upper end side of the valve shaft 60, which is arranged so as to be aligned and is provided in the central portion on the upper surface side, is placed in the trap chamber c.
The machine wall 4 has a through hole provided in the central portion of the ceiling wall 4a and is fitted with airtightness, and a projecting end projecting above the ceiling wall 4a is provided on the upper surface side of the ceiling wall 4a. Cylinder device
By connecting to the rod 61, above the opening 2a on the upper end side of the vertical tubular body 2 below the ceiling wall 4a, the opening is formed.
It is hung on the ceiling wall 4a so that it can freely move up and down with respect to 2a.

When the valve body 6 descends by the operation of the hydraulic cylinder device 61 and closes the opening 2a on the upper end side of the vertical cylindrical body 2, the annular valve seat w provided in the opening 2a A valve y made of a sealing material is provided in an annular shape at the abutting portion.

As shown in FIG. 4, the valve body 6 is formed in a hollow flat box shape, and a water conduit 70 is installed inside the valve body. Is connected to the inner end side of the connecting pipe 71 protruding to the upper surface side (or side surface side) of the valve body 6, and the outer end side of the connecting pipe 71 penetrates the machine wall c of the trap chamber c in a watertight manner. It is connected to a water supply pipe 72 guided to the outside through a flexible water supply hose 73. A large number of cleaning nozzles 74, which communicate with the above-mentioned water conduit 70, are provided in the drying chamber b at the inner side of the valve y provided in the annular shape on the lower surface side of the valve body 6. The cylinders 1 are arranged so as to correspond to a large number of cylinders 1 to be installed, and are installed so as to project downward. The ceiling wall 4a of the machine wall 4 forming the partition wall of the trap chamber c is formed as a removable lid plate, and the valve body 6 is assembled to the lid plate.

The embodiment apparatus configured as described above operates as follows.

When the material to be dried injected into each of the cylindrical bodies 1 is frozen and the freeze-drying process is performed, the valve body 6 is raised as shown in FIG.

As a result, a sufficient steam flow path for guiding the steam sublimated from the material to be dried inside the cylindrical bodies 1 ... In the drying chamber b to the trap 3 is provided on the lower surface of the valve body 6 and the vertical tubular body 2. Is formed between the upper edge of the opening 2a and the edge of the opening 2a.

What is the water vapor flow path formed between the valve body 6 and the edge of the opening 2a of the vertical tubular body 2 by the rise of the valve body 6 that narrows the flow path with the trap 3. Therefore, only by slightly raising the valve body 6, the drying chamber b and the trap chamber c shown in FIGS. 5 to 8 are separately formed and communicated with each other via the valve v. It becomes possible to form a much wider flow path than the conventional means.

Next, the dried material to be dried is taken out by the opening operation of the bottom lid 22, and subsequently, when freeze-drying a new material to be dried, first, the ice condensed in the trap 3 is melted and removed. To do. This melting and removal of ice is performed by lowering the valve body 6 to seal the opening 2a on the upper end side of the vertical cylindrical body 2 and circulating the heat medium in the trap 3 in that state to the trap 3 It can be done by giving it to the frozen ice.

The heating for melting and removing the ice condensed in the trap 3 is not limited to passing the heat medium through the trap 3. Needless to say, known means that has been conventionally used, such as passing heated steam through the trap chamber c or equipping a heating means and operating it, may be used.

The melting and removal of the ice condensed in the trap 3 by heating is
By closing the opening 2a on the upper end side of the vertical tubular body 2 with the valve body 6, the vertical chamber is accommodated with the trap chamber c for containing the trap 3 and the many cylindrical bodies 1 for injecting the material to be dried. Form 2
Since the drying chamber b surrounded by is airtightly blocked, the steam generated when the ice is melted can be blocked from the drying chamber b.

Further, when the process of melting and removing ice from the trap 3 is performed, at the same time, the process of supplying the material liquid to be dried into each of the cylindrical bodies 1 in the drying chamber b and freezing it is performed. . This step can be performed without being humidified by the water vapor generated in the trap chamber c by hermetically blocking the drying chamber b from the trap chamber c.

At this time, when it is necessary to form an ice film before freezing the material liquid to be dried, first, the process of supplying water to freeze it to form an ice film is performed.

As a result, the steps of pouring and freezing the material liquid to be dried can be performed during the step of removing ice from the trap 3.

Next, FIG. 9 is a perspective view of an essential part of another embodiment.

This embodiment shows a deforming means for providing the valve body 6 so as to be vertically movable. That is, the valve body 6 is pivotally attached at one end of the peripheral edge thereof to the rim of the opening 2a on the upper end side of the vertical tubular body 2 by the hinge 80 so that the vertical movement of the valve body 6 is This is an example in which the hinge 80 is rotated about its center. The center of the hinge 80 is rotated by appropriate means such as rotating the hinge 80 by a driving means. Further, in this embodiment, the water vapor flow path opened by the upward rotation of the valve body 6 is wide on the rotating end side of the valve body 6 and narrow on the side close to the hinge 80. 2 is eccentrically arranged on the side of the hinge 80 and arranged in the trap chamber c, and a large number of traps 3 arranged in the trap chamber c are arranged on the side opposite to the hinge 80. Since the remaining structure is the same as that of the above-described embodiment, detailed description thereof will be omitted.

In this embodiment, the valve body 6 operates in the same manner as the above embodiment.
The up and down movement of can be driven by the hinge 80,
The driving means can be made extremely small.

[Advantages of the Invention] As described above, the freeze-vacuum drying apparatus according to the present invention configured as described above includes the trap chamber c accommodating the trap 3.
And a drying chamber b accommodating the cylindrical body 1 for injecting the material liquid to be dried, the opening on the upper end side of the vertical cylindrical body 2 surrounding the drying chamber b.
Since 2a is closed by the valve body 6 to be airtightly shut off, the valve body 6 airtightly shuts off the trap chamber c and the drying chamber b from each other, so that each cylinder in the drying chamber b is closed. The process of injecting the material liquid to be dried into the body 1 and freezing is performed during the melting process of the ice condensed in the trap 3 in the trap chamber c in a state where the humidification by the steam generated thereby is blocked. Like Moreover, since the valve body 6 is substantially provided, the structure is not complicated.

[Brief description of drawings]

FIG. 1 is a vertical side view of the conventional means, FIG. 2 is a horizontal cross-sectional view of the above-mentioned device with a part of the main part omitted, FIG. 3 is a vertical side view of an apparatus of an embodiment of the present invention, and FIG. Longitudinal side view of the body, No. 5
FIG. 6, FIG. 7, FIG. 7 and FIG. 8 are explanatory views of another conventional means,
FIG. 9 is a perspective view of an essential part of another embodiment of the device of the present invention. Explanation of reference symbols A ... Freezing vacuum drying device, a ... Cooling surface b ... Drying chamber, c ... Trap chamber, h ... Container, v.
Valve w …… Valve seat, y …… Valve, 1 …… Cylinder body 10 …… Supply pipe, 2 …… Vertical cylindrical body, 2a …… Opening 20 ・ 21 …… Brine nozzle, 22 …… Bottom lid 22a …… Support, 23 …… Opening / closing mechanism, 3 …… Trap 30 …… Supply port, 4 …… Machine wall, 4a …… Ceiling wall 40 …… Vacuum exhaust pipe, 5 …… Hopper, 50 …… Lower port 6 …… Valve disc, 60 …… Valve shaft, 61 …… Hydraulic cylinder device 70 …… Water conduit, 71 …… Connection pipe, 72 …… Water supply pipe 73 …… Water supply hose, 74 …… Cleaning nozzle, 80 …… Hinge

Claims (4)

[Scope of utility model registration request] 1. A number of cylindrical bodies 1 ... In which a cooling surface a also serving as a heating surface for supplying heat to a material to be freeze-dried has a vertical direction along a vertical surface, and a partition is a vertical cylindrical body 2 for drying. A trap 3 is stored in parallel in the chamber b, and the outer periphery of the vertical cylindrical body 2 is provided with a trap 3 capable of condensing and collecting water vapor sublimated from the material to be dried and heating and melting the frozen ice layer. , That trap 3
In a freeze-vacuum drying apparatus in which the outer circumference of the vertical cylindrical body 2 is surrounded by an outer cylindrical machine wall 4 forming a trap chamber c, a valve is provided at the edge of the opening 2a on the upper end side of the vertical cylindrical body 2 forming the partition of the drying chamber b. The seat w is installed in an annular shape, and is of a size that shields only the opening 2a above the upper opening 2a of the vertical tubular body 2 below the ceiling wall 4a of the machine wall 4 of the trap chamber c. A freeze-vacuum drying apparatus in which a valve body 6 is provided so as to be movable up and down, and a valve y which is brought into close contact with the valve seat w when the valve body 6 is moved downward. 2. A valve body 6 is formed in a flat box shape, a water supply hose 73 is connected to an upper surface side or a side surface of the valve body 6, and a water conduit for connecting the water supply hose 73 to the inside of the valve body 6. The freeze-vacuum drying apparatus according to claim 1, wherein 70 is provided, and a large number of cleaning nozzles 74 ... Which communicate with the water conduit 70 are provided on the lower surface side of the valve body 6. 3. The valve body 6 is a ceiling wall of the machine wall 4 of the trap chamber c.
The freeze-vacuum drying device according to claim 1, which is suspended vertically on 4a. 4. The valve body 6 is provided with an opening 2a on the upper end side of the vertical cylindrical body 2.
2. A hinge-like connection to the rim portion of the to make it movable up and down.
The freeze-vacuum drying device described.