JPS6252233B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of drying a slurry-like material to be dried while being finely crushed by three-dimensional vibration of a container, thereby producing a uniform and fine powder without any lump-like aggregates. The present invention relates to a vibratory crushing and drying method capable of drying in a dry state.

Conventionally, a vibration drying method has been known as a method for drying materials containing a large amount of moisture, but as is well known, this vibration drying method uses vibration to move the material to be dried in multiple stages from the top to the bottom while blowing hot air. Since drying is carried out by drying, not only does drying take a relatively long time, but the equipment becomes large and the equipment and operating costs increase significantly, resulting in high drying costs.

An object of the present invention is to eliminate such conventional drawbacks and to provide a new vibratory crushing and drying method capable of drying a slurry-like material to be dried into a fine powder state free of any aggregates. It is.

In the vibratory crushing and drying method of the present invention, the top lid is provided with an inlet for the material to be dried and an outlet for the dried material. At the same time, a supply pipe with a large number of hot air outlets is provided in the space below the perforated plate to form a container, and the material to be dried in the form of a slurry is introduced onto the perforated plate from the supply port, and the container is Vibrating three-dimensionally, the material to be dried is crushed into powder by the raised ridges of the perforated plate, while hot air is blown upward from the hot air outlet to the top of the perforated plate, and the material is crushed into powder by the wind pressure. The material to be dried is blown upward and dried while being discharged from the discharge port.

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 a plurality of coil springs provided on the upper surface of the base at appropriate intervals, and 3 is a container supported via the coil springs 2. At the center of the lower part of the container 3, an electric motor 6 with a mounting ring 4 and a mounting rod 5 is fixed vertically.
A rotating shaft 7 protruding from the electric motor 6 in both vertical directions;
Weights 8, 8 are detachably attached to eccentric positions of 7.

The container 3 has a bottomed cylindrical lower body 3b having a bottom plate 3a and a cylindrical upper body 3d having an inverted funnel-shaped top lid 3c, stacked on top of each other, and the flanges on the upper and lower edges of each are connected to the connecting band 9. Therefore, they are integrally sandwiched and connected. The outer periphery of a perforated plate 10 is fixed inside the upper body 3d, and a hot air supply pipe 11 is provided in the inner space of the lower body 3b located below the perforated plate 10. As shown in FIG. 2, the perforated plate 10 has a circular plate with a large number of ventilation holes 12 having a diameter of about 7 mm, and radially raised protrusions 13 on the upper surface. Further, as shown in FIG. 3, the supply pipe 11 is formed by connecting two annular pipes 11a and 11b formed into a large diameter and a small diameter so as to communicate with each other.
Air supply ports 14, 14 protruding from both sides thereof are positioned to protrude outward from the side wall of the lower body 3b. Further, a closing plate 15 for preventing leakage of hot air is fixed above the supply pipe 11, and a large number of blow-off ports 16 for the supply pipe 11 are provided passing through the closing plate 15.
In the top lid 3c of the upper body 3d, an input port 17 for the material to be dried is formed at the center, and a discharge port 18 for the dried material is provided near the outer periphery.

FIG. 4 shows the layout of the entire system for carrying out the method of the present invention. In the figure, 19 is a hopper into which the material to be dried in the form of slurry is input, and 20 is connected to the input port 17 and is inside the hopper 19. 22 is a hot air generating furnace that sends hot air of 400°C to 600°C to the air supply ports 14, 14, and 23 is connected to the discharge port 18. The dust collectors are shown below.

According to the present invention, the motor pump 21 is operated while giving a three-dimensional vibrational motion to the container 3 through the rotation of the electric motor 6 and the action of the unbalanced weights 8, 8 provided on the rotating shafts 7, 7. The material to be dried in the form of slurry in the hopper 19 is continuously supplied onto the perforated plate 10 while the hot air generating furnace 2
2 supplies hot air at 400° C. to 600° C. to the supply pipe 11, and blows the hot air upward from the air hole 12 of the perforated plate 10 through the blower outlet 16. The material to be dried supplied onto the perforated plate 10 is prevented from falling through the ventilation holes 12 by the wind pressure of the hot air, and first, the contained moisture is rapidly sublimated and dehydrated by the heat retained in the perforated plate 10 and the hot air. At the same time, it aggregates to form a nodule, and then this nodule moves in a spiral manner due to the three-dimensional vibration of the container 3 and collides with the radial raised ridges 13 of the perforated plate 10 or is generated inside the container 3. It is gradually broken down into fine pieces by turbulence. By repeating this crushing action, the slurry-like material to be dried becomes fine powder and is blown upward by the pressure of the hot air blown out from the outlet 16 through the ventilation hole 12 into the container 3.
It floats in the air and comes into active contact with the hot air, further promoting drying. Then, only the powder that has been completely dried and has a reduced specific gravity is sequentially discharged from the discharge port 18 along with the hot air, and is collected by the dust collector 23. In addition, those in a lump state or those in a powder state that have not been sufficiently dried are further crushed into fine particles or continued to be dried, and finally become a complete powder and collected in the dust collector 23. .

As described in detail above, according to the vibratory crushing and drying method of the present invention, the material to be dried is dried while being finely crushed by the three-dimensional vibration of the container and the blowing of hot air. Since the drying material is discharged from the outlet provided in the top lid using wind pressure, even materials with high water content and cohesive properties, such as slurry-like materials, are not formed into lumps. The powder can be dried into a fine and uniform powder without any aggregates.

In addition, according to the method of the present invention, there is no need to provide multiple perforated plates as in the conventional vibration drying method, so not only does the container and other incidental equipment not become large, but the material to be dried and the hot air are kept close to each other. It has great effects such as being able to dry in a short time upon contact.

[Brief explanation of the drawing]

The figures relate to the present invention; FIG. 1 is a longitudinal sectional view of the container, FIG. 2 is a sectional view taken along line X--X in FIG. Figure 4 is a layout diagram of the entire system. 3... Container, 3c... Top lid, 10... Perforated plate, 1
1... Supply pipe, 13... Raised protrusion, 16... Air outlet, 1
7...Input port, 18...Discharge port.

Claims (1)

[Claims] 1. The top lid is provided with an input port for materials to be dried and an outlet for dried materials, and inside, a perforated plate with raised protrusions on the upper surface is arranged horizontally, and a space below the perforated plate is provided. A supply pipe with a large number of hot air outlets perforated therein is provided to form a container, and a slurry-like material to be dried is introduced onto the perforated plate from the supply outlet, and
The container is vibrated three-dimensionally and the material to be dried is crushed into powder by the raised protrusions of the perforated plate, while hot air is blown out above the perforated plate from the hot air outlet, and the material is crushed into powder by the wind pressure. A vibratory crushing and drying method characterized in that the material to be dried is blown upward and dried while being discharged from a discharge port.