JPH04251185A - Vibrating reduced pressure drying machine - Google Patents

Abstract

PURPOSE:To provide a vibrating reduced pressure drying machine, effecting highly efficient drying effect, by providing the title machine with an effective mixing power through batch system. CONSTITUTION:A drum 32 is slanted downwardly toward a discharging port 41 and a vibrating motor is provided so as to be biased to one side with respect to the axial direction of the drum 32 while the discharging port 41 is closed by a gate means 48 and the vibrating motor 60 is driven to vibrate the drum 32. This vibrating force has the component of vibrating force in a slanted direction with respect to the axial center of the drum 32.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibratory vacuum dryer.

0002

[Prior art and its problems] For example, Japanese Patent Publication No. 55-37
No. 944 discloses the following vibration dryer. That is, as shown in FIGS. 9 to 11, a cylindrical drum 1 is closed with lids 2 and 3 on both sides to form a sealed structure, and a jacket 4 is uniformly attached to the inner peripheral wall. A heat medium is introduced into this through an inlet 5, and is guided to the outside through a heat medium outlet 6.

The drum 1 is supported by an elastic support mechanism 7 that elastically supports the drum 1 almost horizontally, and this is composed of a pair of front and rear arms 8 and a coil spring 9, and supports the drum 1 so as to vibrate. Further, a material supply port 11 is formed in one of the upper walls of the drum 1, and a flexible cylinder 12 is connected to the material supply port 11.
, material is supplied from a hopper 14 via a rotary valve 13, and dried material is supplied to the other lower wall via a material outlet 15, a flexible cylinder 16, and a rotary valve 17. I try to drain it outside. Further, a vibration generator 20 made of a vibration motor or the like is provided directly below the axis of the drum 1, as clearly shown in FIG.

The conventional dryer is constructed as described above. When the vibration generator 20 is driven, the material M to be dried in the drum 1 undergoes a rolling motion as shown by the loop line A. The material is dried by exchanging heat with the heat medium introduced into the jacket 4, but in this conventional example, the material is continuously supplied from the hopper 14, and the material is fed to a dam installed near the lid 2 that can move up and down. Material discharge port 1 beyond plate 18
5. The liquid is discharged to the outside via the flexible tube 16 and the rotary valve 17.

As described above, the material M to be dried is transferred to the drum 1.
As shown in Fig. 10, the material M is dried in the drum 1 through a stirring motion as shown by the trajectory of line A, but in reality, the material M is dried in the drum 1 as shown by the trajectory of dashed line B. It should rise along the inner wall to perform stirring action also on the right side in the figure with respect to the axis G of. Furthermore, in reality, it is unlikely that a height as high as that shown by lines A and B can be obtained.

FIG. 11 shows another example of this prior art, in which the drum 1 is provided with a plurality of pipes 21 through which a plurality of heat mediums pass, thereby increasing the heat transfer area. However, since the position is below the level of the weir plate 18, there is no problem with this, but it will not have any effect unless it is placed only in this area.

[0007] In addition, even in the conventional example described above, when the material M evaporates moisture, it is discharged to the outside through the exhaust port 19; However, if a large amount of moisture is rapidly vaporized from the material M to be dried, the moisture will accumulate in the drum 1, which will reduce the drying effect of the material M to be dried.

[0008]

Problems to be Solved by the Invention The present invention has been made in view of the above problems, and can be dried efficiently no matter what amount of moisture the material contains, and even if it provides the same vibrational force as the conventional example. It is an object of the present invention to provide a batch type vibratory vacuum dryer that can provide a more effective stirring force and obtain a more efficient drying action.

[0009]

[Means for Solving the Problems] The above object is to provide a closed container supported so as to vibrate, a means for heating the inside of the closed container, a supply port for a material to be dried formed in the closed container, and a discharge port for the material. an outlet; a gate means for freely opening and closing the outlet;
A gas outlet formed in a part of the airtight container, an exhaust device connected to the gas outlet, a rotating shaft provided offset to one side with respect to the axial direction of the airtight container, and the rotation. a circular excitation force generator having an unbalanced weight fixed to a shaft, the closed container is inclined downwardly toward the discharge port with respect to the horizontal line, and the rotating shaft is connected to the closed container. is inclined at a predetermined angle with respect to the axis of the material, and when the circular excitation force generating device is driven to dry the material supplied from the drying material supply port, the material discharge port is closed by the gate means. This is achieved by a vibratory vacuum dryer characterized in that the material is discharged to the outside by opening the gate means after a predetermined drying process is carried out.

0010

[Operation] The closed container is biased to one side with respect to its axial center, and its rotating shaft is excited by a circular excitation force generator installed at a predetermined angle with respect to the axial center.
The material to be dried inside it is dried along its inner wall than conventionally.
The inside of the closed container is heated by the means that heats the inside of the closed container while moving in a three-dimensional manner by receiving a transfer force in the axial direction while drawing a locus in which the transfer force is applied upward and a large stirring force is applied. In addition, the inside of the container is forcibly exhausted from the gas outlet by the exhaust device, so even if moisture or liquid vaporizes from the material to be dried, the air is efficiently taken in by the exhaust device, and the material to be dried in the sealed container is Drying can be done more efficiently than before. Furthermore, by liquefying the gas discharged from the gas outlet outside, not only the moisture but also the solvent that dissolved the material to be dried can be recovered, making it possible to effectively utilize resources.

[0011] The above is carried out with the gate means closing the material discharge port, but when the desired degree of dryness is obtained, the gate means is opened and the dried material is discharged to the outside from this discharge port. be able to. At this time, when the transfer direction due to the vibration force component in the diagonal direction with respect to the axis of the closed container is toward the material discharge port, the material can be smoothly discharged from the material discharge port by this circular excitation force generator. However, if the side opposite to the material discharge port is receiving a transfer force due to the diagonal vibration force component of the circular excitation force generator, it is tilted toward the material discharge port. The dried material can be easily discharged to the outside from the material discharge port due to the gravity action caused by this inclination. The transfer force due to the vibration force component in the diagonal direction with respect to the axis of the closed container is the transfer force to the side opposite to the discharge port, and if the discharge of the material from the discharge port is delayed, this circular excitation force will be generated. All you have to do is stop the device.

As described above, the material is heated three-dimensionally by the heating means while being stirred in the closed container, so that the material can be dried uniformly and quickly, and the liquid that is generated from the material can be dried evenly and quickly. and moisture can be efficiently sucked in by the exhaust device.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vibration vacuum dryer according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 1, the present vibratory vacuum dryer is indicated as 30 as a whole, and this vibratory vacuum dryer main body 31 is equipped with a metal cylindrical drum 32, and a heat insulating material made of a heat insulating material is provided on the inner surface of the drum 32. Furthermore, a steam jar 34 (corresponding to the jacket 4 of the conventional example) is attached over the entire inner circumferential wall. This steam jar 34 includes a boiler 35, a control valve 36, and a pressure reducing valve 39.
A heat medium is supplied through the. This is steam jar 3
4 and is discharged to the outside from a steam trap 42. Further, from the boiler 35, the heat medium is introduced in a pressurized state into the steam jar 34 attached to the inner wall of the drum 32 of the vibration vacuum dryer main body 31. The pressure inside the main body 31 of the vibrating vacuum dryer is measured by a pressure gauge 38.

The drum 32 has a pair of front, rear, left and right supports 43a,
43a and 43b, 43b and springs 44a, 44a, 4
4b, 44b on the base 100, that is, the drum 32 is supported so as to be able to vibrate. Interposed below the springs 44a, 44a and 44b, 44b are liners L1, L2, which cause the drum 32 to slope downwardly with respect to the horizontal line H--H in FIG. This angle of inclination is adjusted depending on the thickness of the liners L1 and L2, and is set to 2 degrees in this embodiment. Further, a supply port 40 for supplying the material to be dried is formed at one end of the upper wall of the drum 32, and a material discharge port 41 is formed below the one end wall. Material discharge port 41
can be opened and closed by a gate means 48. Furthermore, an exhaust gas outlet 49 is formed on the other side of the upper wall, and a filter is disposed inside this outlet. The exhaust port 49 connects to a heat exchanger 54 with a heat insulating material attached to the inner wall surface via a bellows pipe 50.
A refrigerator 55 is disposed above it. Refrigerant is supplied into the heat exchanger 54 from here. A solvent recovery vessel 56 is provided below the heat exchanger 54, and a solvent discharge valve 57 is attached to the bottom wall of the solvent recovery vessel 56. An exhaust system 59 mainly consisting of a vacuum pump 58 is installed on the upper wall of the heat exchanger 54.
is provided, so that the interior space of the vibrating vacuum dryer main body 31 is always forcibly evacuated via the heat exchanger 54 and the bellows pipe 50.

According to this embodiment, as shown in FIG. 4, a portion of the outer circumferential wall surface of the drum 32 that is offset to the left in the figure from the vertical center line D-D passing through the axis C of the drum 32 A vibration electric motor 60 is attached.

The vibration electric motor 60 has a known configuration, but
Semicircular unbalanced weights W, W are fixed to both ends of the rotating shaft 60a, and the rotation of these weights generates centrifugal force, which is applied to the drum 32.

The vibration electric motor 60 is attached to the frame 45 with a liner L3 interposed therebetween, and this liner L3 allows the rotating shaft 60a of the vibration electric motor 60 to be connected to the drum 3.
Although it is inclined with respect to the axis C-C of No. 2, it is disposed parallel to the floor surface H-H, that is, horizontally. A circular excitation force is generated by the rotation of the unbalanced weights W, W, but this circle is
in a vertical direction.

Vibratory vacuum dryer 30 according to an embodiment of the present invention
is constructed as described above, and its operation will be explained next.

This embodiment can be applied to various materials to be dried; for example, organic materials containing certain organic solvents, such as acrylic resins, resin additives, and food additives, are dried. Let me explain the case.

[0021] Such a material is shown in FIG.
from there into the internal space of the drum 32. Once the supply reaches a certain level, the supply will be stopped. Gate means 48 closes the outlet 41. and vibration electric motor 60
When driven, the supplied material M moves as shown by R in FIG. That is, the material M is subjected to a force that moves it toward the top along the inner peripheral wall surface of the drum 32, and when it reaches a certain height, it falls downward by natural fall as shown by the arrow. By repeating such a movement, a stirring movement shown by the R line is performed.

Further, the material is subjected to a transfer force along the axis C--C of the drum 32, and moves in that direction according to the direction of inclination of the vibration component of the vibration motor 60 with respect to the axis. drum 3
2 is sealed at both ends by lids 32a and 32b, so when one reaches 32a, this lid 3
It receives a force rising along the inner wall surface of the drum 32, and when it rises to a certain point, it falls downward, stirring in the clockwise or counterclockwise direction in a plane perpendicular to the axis C-C of the drum 32. In addition to the force, the inner wall surface of this lid 32a also receives a stirring force, and since the material is conveyed one after another toward this lid 32a, there is a reaction by this lid 32a and a downward tilt of the drum 32. receives a force that moves it in the opposite direction. Therefore, when the lid 32b on the opposite side is reached, this lid 32b is subjected to the pressing force of the material transferred one after another, and is subjected to a stirring action similar to the stirring action on the one lid 32a, and the drum 32 is again moved. Due to the vibration component of the vibration motor 60 in a diagonal direction with respect to the axis C-C of the drum 32 along the axial direction C-C, a transfer force is applied in this direction and further reaches one lid 32a, thereby stirring as described above. Receive power. In the end, the material is stirred three-dimensionally within the drum 32 by the stirring force caused by the movement along the axial direction C-C and the stirring force in a plane perpendicular to the axial center.
During this time, the inside of the drum 32 is heated by steam. The above steps are performed with the gate means 48 closing the material discharge port.

On the other hand, the heat medium is supplied from the boiler 35 to the valve 3.
6. The steam is supplied to the steam jar 34 inside the drum 32 via the pressure reducing valve 39 to uniformly heat the inside space. The material M subjected to the above stirring action is uniformly heated,
Moisture and various solvents will vaporize from now on, but this will occur in the exhaust system 5.
9, the vaporized gas is forcibly exhausted through the bellows pipe 50, and the vaporized gas immediately passes through a filter to remove dust and the like, and the vaporized gas is supplied to the heat exchanger 54. Here, the solvent is separated by heat exchange with the refrigerant from the refrigerator 55 and recovered in the solvent recovery device 56. This is appropriately discharged to the outside via a valve 57.

After completing the predetermined drying action, the gate means 4
8 will be opened. At this time, the vibrating electric motors 60a and 60b are still driven and are subjected to the agitation action as described above within the drum 32, but with this movement, the drum body 32 moves toward the discharge port 41 with respect to the horizontal line according to this embodiment. Since the drum 32 is inclined downwardly by two degrees, the dried material in the drum 32 is sequentially discharged to the outside from the discharge port 41 as shown by the arrow. Further, when the gate means 48 is closed and the drying operation as described above is performed, the material tends to be unevenly distributed to the right in FIG. Due to the stirring action, the force is uniformly distributed within the drum 32 and does not have any adverse effect on the drying action. Note that the downward inclination angle of the drum 32 toward the discharge port 41 with respect to the horizontal line and the direction α of the circular vibration force of the vibrating motor 60 are preferably adjusted depending on the filling rate of the material to be dried in the drum 32, for example, about 30%. At a filling rate of , as in this embodiment, the 2 degree slope can be efficiently stirred and dried, and when the desired drying effect is obtained, it can be smoothly discharged to the outside by opening the gate means 48. .

In other words, in this embodiment, a certain amount of material is dried in a batch manner, but in general, there is no such batch-type processing apparatus that tilts the drum downward with respect to the horizontal line. Although it is desirable to adjust the angle of the downward inclination depending on the filling rate, according to this embodiment, the thicknesses of the liners L1 and L2 may be appropriately adjusted to obtain an appropriate stirring action.

Furthermore, this type of batch drying process often takes several hours at a time, and opening and closing the gate means 48 each time is not so troublesome.

The vibrating vacuum dryer 30 according to the first embodiment of the present invention is constructed and operates as described above, but the material to be dried is subjected to a large three-dimensional stirring action and is separated from the drying material. Since the moisture and liquid gas that has been removed is forcibly exhausted by the exhaust system 59, the drying effect can be greatly improved compared to the conventional method.

5 to 8 show a vibratory vacuum dryer according to a second embodiment of the present invention, parts corresponding to those in the first embodiment are given the same reference numerals, and detailed explanation thereof will be given below. Omitted. That is, according to this embodiment, the dryer main body is indicated by 61 as a whole, and a vibrator 63 according to the present invention is provided on one side of the peripheral wall portion of the drum main body 62. Further, the drum main body 62 is tilted downward several degrees in the figure and is supported so as to be able to vibrate by anti-vibration springs 66a, 66b, 67a, and 67b disposed on support columns 64a, 64b, 65a, and 65b. A supply port 40 through which material to be dried is supplied is formed at the left end of the drum body 62 in FIG.
Further, a discharge port 41 for discharging this dried material is provided at the right end.

The drum body 62 is reinforced with ribs 70 on its peripheral wall, and its right end is partially closed with a lid 71.

Next, the details of the vibrator 63 are shown in FIG.
This will be explained with reference to FIG.

The vibrator 63 according to the present invention is a circular vibrator that generates a circular vibration force, and an electric motor 84 is fixed on a pedestal 83 disposed on the side of the drum body 62. It is a driving source. A first link 85 connected to a universal joint mechanism at both ends thereof is connected to a rotating shaft 84a of the electric motor 84. That is, the electric motor 84
The rotating shaft 84a is connected to a first link 85 via a universal joint 86a, and its left end is connected to a first support shaft 89 via a universal joint 86b. This first support shaft 89 is fitted into inner races of a pair of bearings 88a and 88b fixed on both sides of a mounting plate 87 attached to the drum body 62, and has an approximately A semicircular unbalanced weight 90a is fixed, and an unbalanced weight 90b having the same shape as the unbalanced weight 90a is fixed to the other end of the first support shaft 89.

The first support shaft 89 is further connected to a second link 91 and a second support shaft 95 via universal joints 92a and 92b, which are attached to a mounting plate 93 attached to the peripheral wall of the drum body 62. It is inserted into and fitted into the inner races of a pair of bearings 94a and 94b provided on both sides, and unbalanced weights 9 having the same shape as the aforementioned unbalanced weights 90a and 90b are attached to both ends thereof.
6a and 96b are fixed. The rotational axis X-X of the vibrator 63, which is made up of the support shafts 89, 95, links 85, 91, etc., is parallel to Q-Q in FIG.
- It is inclined by α degrees with respect to C. In other words, it is horizontal.

The vibration vacuum dryer main body 61 according to the second embodiment of the present invention is constructed as described above, and its operation will be explained next.

Although not shown in the drawings, it is assumed that some kind of powdery material to be dried is fed from the material supply port 40. When the electric motor 84 is driven, the rotational force of the rotating shaft 84a rotates a pair of unbalanced weights 90a, 90b via the universal joints 86a, 86b and the first link 85, and further rotates the unbalanced weights 90a, 9.
The unbalanced weights 96a and 96b fixed to both ends of the second support shaft 95 connected via the first support shaft 89, the universal joints 92a and 92b, and the second link 91 that fix 0b rotate in the same way. Driven. Note that the rotation of the unbalanced weights 90a, 90b, 94a, and 94b generates a centrifugal force, that is, a circular excitation force, around their rotation axes, that is, the axes of the support shafts 89 and 95, as will be described later. In this mode, the drum body 62 vibrates due to the excitation force. A rotating shaft 84a of the electric motor 84 is coupled to unbalanced weights 90a and 90b via universal joints 86a and 86b, and a first
Since the support shaft 89 is connected to unbalanced weights 96a and 96b via universal joints 92a and 92b, almost no vibration of the drum body 62 is transmitted to the electric motor 84, and stable rotational driving can be continued. Can be done.

It is clear that the same effects as in the first embodiment can be obtained in this embodiment as well. In other words, the material is subjected to a three-dimensional stirring action within the drum body 62, allowing efficient and uniform heating and drying.

Although each embodiment of the present invention has been described above, the present invention is of course not limited to these, and various modifications can be made based on the technical idea of the present invention.

For example, in the example, the solvent evaporates from the material,
Although this is collected, it may be only water, and in this case as well, it not only increases the drying effect but also prevents moisture from being introduced into the exhaust system 59 and protects it. be.

Furthermore, the means for heating the closed container is not limited to the steam jar 34, but may be an electric heating coil disposed inside or an induction heating means disposed outside.

[0039]

[Effects of the Invention] As described above, according to the vibration vacuum dryer of the present invention, even if the material to be dried contains a large amount of water or liquid, it is possible to efficiently and quickly dry the material. can. Although this is carried out in a batch manner, even after the desired drying has been performed, the material can be smoothly discharged to the outside without using any conveying means. In other words, the entire dryer can be made simple.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a piping system of a vibration vacuum dryer according to a first embodiment of the present invention, with a vibration mechanism not shown.

FIG. 2 is a side view of a main body of the dryer.

FIG. 3 is a front view of the main body of the dryer.

FIG. 4 is a schematic front view for explaining the operation of the above embodiment.

FIG. 5 is a side view of a main body of a vibratory pressure reducer according to a second embodiment of the present invention.

FIG. 6 is a plan view of the same.

FIG. 7 is a front view of the same.

FIG. 8 is a partially enlarged front view of the main part.

FIG. 9 is a partially cutaway side view of a conventional vibration heating dryer.

FIG. 10 is a front view of the same.

FIG. 11 is a front view showing another example.

[Explanation of symbols]

30 Vibration vacuum dryer 31 Vibration vacuum dryer body 32 Drum 34 Steam jar 40 Supply port 41 Discharge port 48 Gate means 49 Exhaust gas inlet 60 Vibration electric motor 61　Vibration vacuum dryer body 62 Drum 63 Vibrator

Claims (1)

[Claims] A closed container supported so as to vibrate, a means for heating the inside of the closed container, a material supply port and a discharge port for the material formed in the closed container, and a gate means for freely opening and closing the discharge port. , a gas outlet formed in a part of the sealed container, an exhaust device connected to the gas outlet, a rotating shaft provided offset to one side with respect to the axial direction of the sealed container; a circular excitation force generator having an unbalanced weight fixed to a rotating shaft, the sealed container being inclined downwardly toward the outlet with respect to the horizontal line, and the rotating shaft It is inclined at a predetermined angle with respect to the axis of the container, and when the circular excitation force generating device is driven to dry the material supplied from the material supply port, the discharge port of the material is controlled by the gate means. A vibratory vacuum dryer characterized in that the gate means is closed and the material is discharged to the outside after a predetermined drying process is performed.