JPS6245467B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for efficiently drying moist powder and granular materials containing water or other volatile liquids using hot air to make them smooth.

Drying equipment that blows hot air has been known for some time, but it consumes a large amount of thermal energy and is expensive, and blowing high-temperature hot air is not preferable depending on the nature of the material to be dried. Something happened. For example, the configuration of the vibrating continuous drying apparatus described in Japanese Patent Application Laid-Open No. 57-82681 will be explained according to FIG. 7. In the figure, 1' is a cylindrical case in which multiple short cylinders are stacked. The outer circumferences of perforated plates 2', 3', and 4' are fixed inside each short cylinder, and each perforated plate is arranged in multiple stages at equal intervals, and a tightening band 8' is attached to the stacked part of each short cylinder. to form a cylindrical case. A material supply port 6' is provided at the center of the top cover of the cylindrical case 1', and a hot air discharge port 5' is provided near the outer periphery. A hot air inlet 7' is attached to the side wall of the lowermost bottom case which does not have a perforated plate. A material discharge port 15' is provided on the lower circumferential wall of the cylindrical case 1', which is located on the upper surface of the lowest perforated plate 4', and a material discharge pipe 16' is connected to the material discharge port 15'. There is. At the center of the lower surface of the bottom of the cylindrical case 1' is an upper
Vibration motor 1 with unbalanced weight underneath
0' is installed. The bottom of the cylindrical case 1 is elastically supported by a frame 11' via a plurality of springs 9'. The perforated plates 2', 3' on the upper stage are provided with a drop passage to the lower stage. That is, a rectangular drop opening 14' is provided in the radial direction of the perforated plates 2', 3', and a drop tube 12' is provided on the lower surface of the drop opening 14.
The upper end is welded to form a square prism, and the lower end is a nearly vertical opening. This lower end opening is located above the center of the lower perforated plates 3', 4'. Further, a sealing plate 13' is provided at the lower end of the opening, and this is a rubber plate.The upper end of the sealing plate 13' is fixed to the upper side of the opening, and the lower part thereof is swingable. Normally, the lower end of the drop tube 12' is closed by gravity. It's becoming blocked. A vibration motor 10' on the lower surface of the bottom of the cylindrical case 1 gives a three-dimensional turning motion to the cylindrical case 1' by its rotation and the operation of the upper and lower unbalanced weights. However, in this lever device, while the cylindrical case 1' is driven by the vibration motor 10', the powder to be dried is continuously supplied through the material supply port 6', and the hot air inlet 7' is connected to a flexible tube (not shown). Hot air is supplied into the bottom of the cylindrical case 1' in communication with a hot air source through the cylindrical case 1'. The hot air sequentially ascends through the small holes in the perforated plates 4', 3', and 2', and is discharged to the outside from the hot air outlet 5'. During this time, the powder and granules supplied fall onto the center of the uppermost perforated plate 2'.
The hot air rising from below prevents the powder from falling through the small holes, and in this state, the powder is moved from the center to the outer periphery by driving the vibration motor 10'. As a result, when it reaches the drop opening 14', it falls inside the drop tube 12', passes through the lower end opening, pushes out the blocking plate 13', and falls into the center of the lower perforated plate 3'. .

However, this conventional vibrating continuous drying apparatus has the following drawbacks. That is, in this case, the powder to be dried supplied from the material supply port 6' is conveyed sequentially over the perforated plates 2', 3', and 4' and reaches the material discharge port 15', regardless of the degree of dryness. , exposure to high-temperature hot air for long periods of time may result in chemical changes such as destruction of nutrients due to high temperatures. Of course, this can be countered by lowering the temperature of the hot air, but in this case, if the powder to be dried supplied in this device has a high moisture content, it may be discharged from the material discharge port 15' in an undried state. Therefore, its control was extremely difficult. Furthermore, this device has a problem in that when a high-moisture powder mass is supplied, it tends to clog the drop tube 12' and cause malfunction.

The present invention aims to provide a drying device capable of effectively drying an object in a short period of time by blowing hot air onto the object from below while applying three-dimensional vibration to the object. A container is supported through several coil springs, a motor is fixed vertically at the center of the lower part of the container, and a weight is attached to an eccentric position of the rotating shaft of the motor. A perforated plate is arranged horizontally, hot air is supplied to the space below the perforated plate,
Powder for drying is placed on the perforated plate, and an outlet is provided in the ceiling of the container through which the dried powder is discharged together with hot air.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a cylindrical base, 2 is several coil springs provided at intervals on its upper surface, and 3 is a cylindrical base.
is a container supported via the coil spring.
An electric motor 6 is fixed vertically at the center of the lower part of the container 3 with a mounting ring 4 and a mounting rod 5, and a weight 8, 8 is attached removably. The container 3 includes a bottomed cylindrical lower body 3b having a bottom plate 3a and a perforated plate 9.
A right cylindrical intermediate body 3c that supports a hole inside, a right cylindrical upper body 3d that supports a perforated plate 9b inside, and a cap-like lid 3e are respectively connected to an annular connecting band 10a,
By clamping the flanges on the upper and lower edges with 10b and 10c, they are stacked upwardly and connected together. An intake pipe 11 is provided in the space below the perforated plate 9a. The intake pipe is the second
As shown in the figure, two circular pipes 11a and 11b formed with a large diameter and a small diameter are connected to each other in a communicating manner, and air outlets 12, 12... are provided on the upper surface of the pipes, and air supply is provided protruding from both sides. The openings 13, 13 are made to project outward from the side wall of the lower body 3b. The perforated plate 9a is a circular plate having a large number of ventilation holes of about 7 mm in diameter, and radially formed protrusions 14, 14, . . . on the upper surface as shown in FIG. The perforated plate 9a is fixed to a bracket 15 protruding from the inner wall surface of the intermediate body 3c by screws 16 as shown in FIG. Further, the perforated plate 9b has many ventilation holes with a diameter of about 20 mm, which is larger than the perforated plate 9a, and has protrusions on the upper surface like the perforated plate 9a.
It is similarly fixed to the inner wall surface of d with screws 17. At the center position of the lid body 3e is an input port 1 for supplying the material to be dried.
8 is formed. Reference numeral 19 indicates an outlet provided a little distance from the inlet 18, and 20 indicates a strainer plate suspended between the inlet 18 and the outlet 19. Note that a conical body 27 is provided in the input port 18 in order to uniformly drop the material to be dried onto the perforated plate 9b.

FIG. 6 shows the overall arrangement of this drying device system, in which 21 is a tank containing the material to be dried;
22 is a screw conveyor that supplies the material to be dried to the input port 18, 23 is a fan, and 24 is a fan 2.
A hot air generating furnace heats the air supplied from 3 to about 250° C. and sends it to the air supply ports 13, 13, 25 is a bag filter connected to the discharge port 19, and 26 is its intake blower.

In the hot air drying apparatus for powder and granular materials configured as described above, the material to be dried is placed on the perforated plate 9b of the container 3, and the weights 8, 8 are rotated at high speed by the drive of the electric motor 6.
Vibrations and agitation are applied to the electric motor 6 due to the unbalance, and the container 3 vibrates three-dimensionally. Therefore, the material to be dried on the perforated plate 9b moves in a spiral manner and collides with the radial protrusions, crushing the mass and causing fine particles to fall from the ventilation holes onto the lower perforated plate 9a. On the other hand, the air outlet 12 of the intake pipe 11,
The hot air blown from the porous plate 9a passes through the ventilation holes of the porous plate 9a from bottom to top, dries the particles that have fallen from the porous plate 9b, and blows them up. Therefore, the powder and granules that have become smooth are discharged from the exhaust port 19 together with hot air, and are collected by the bulk filter 25. Note that the material to be dried can be continuously supplied from the input port 18.

As described above in the embodiments, in the powder hot air drying apparatus according to the present invention, hot air is blown up from below to the vibrating powder and granules, and the powder and granules are shaken in the hot air, so that the particles come into contact with the hot air. The drying process is very active and the powder can be dried efficiently in a short period of time. Therefore, a sufficient drying state can be obtained even at a relatively low hot air temperature, making it suitable for drying powdery materials that are sensitive to high temperatures, and requiring less heat, resulting in energy savings. The material to be dried on the perforated plate is finely crushed and as it dries, it is discharged from the exhaust port in the ceiling along with hot air, so that it is not discharged undried, and at the same time, it is not over-dried. It has the advantage that overheating is prevented and control is very easy.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a longitudinal cross-sectional view, Figure 2 is a cross-sectional view taken along the line X-X in Figure 1, Figure 3 is a cross-sectional view taken along the Y-Y line in Figure 1, Figure 4 is a partially enlarged view of Figure 1, and Figure 5 is a cross-sectional view taken along the line Y-Y in Figure 1. The figure is a sectional view taken along the Z--Z line in FIG. 4, and FIG. 6 is a layout diagram of the entire system.
FIG. 7 is a longitudinal sectional view showing an example of a conventional drying device. 1... Base, 2... Coil spring, 3... Container,
6... Electric motor, 7... Rotating shaft, 8... Weight, 9
a, 9b...perforated plate, 11...intake pipe,
12...Blowout port, 13...Air supply port, 18...Inlet port, 19...Outlet port.

Claims (1)

[Claims] 1 A container is supported on a base via several coil springs, an electric motor is fixed vertically at the center of the lower part of the container, and a weight is attached to an eccentric position of the rotating shaft of the electric motor. In the container, horizontal perforated plates are arranged in multiple stages with the upper layer being coarse and the lower layer being fine. An intake pipe is provided to supply hot air to the space below the perforated plate, and the perforated plate is installed in the ceiling of the container. A hot air drying device for powder and granular material, characterized in that an input port for introducing powder and granular material for drying onto a plate and an outlet for discharging the dried powder and granular material together with hot air are opened a little apart from each other. .