JPS593671B2 - drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a drying chamber in which a transport carrier to which a substance to be dried is attached is dried while being lowered, a mechanism for separating the dried substance from the transport carrier, and a mechanism for separating the dried substance from the transport carrier. A screw conveyor is provided for conveying the material to be supplied to the drying chamber, and a member for passing the separated dry material and guiding the conveying carrier to the screw conveyor is configured in the shape of an inverted truncated cone. The drying device is provided around the lower end side of the screw conveyor, and the drying device is provided with a vertical path for lowering the conveying carrier under its own weight above the member.

In the above-mentioned drying apparatus, in order to send the transport carriers after drying substance separation to the screw conveyor, a configuration is adopted in which the removal member is formed into an inverted truncated conical shape and is provided around the carrier supply area on the lower end side of the conveyor. The transport carriers from which the substances have been separated are picked up and sequentially introduced into the conveyor as they move along the member.

However, conventionally, the upper edge of the supply port of the screw conveyor is located above the circumferential edge of the component, and the gap between the upper edge of the supply port of the screw conveyor and the component is small. Because it had become quite large, in reality, among the carriers that are filled between the spiral rotor blades protruding downward from the cylinder of the conveyor, the carriers that are separated from the member are picked up, and the tilted picked up is caused by the force exerted by the member. Due to the combination of these actions, the carriers are introduced into the conveyor from a vertical route by taking a short path away from the parts, with dry substances still attached to some parts, and as a result, the carriers tend to accumulate at the starting end of the screw conveyor. , especially when the material to be dried is thermoplastic.
Dry substances accumulated at the starting end of the screw conveyor are thermally melted due to overdrying, and the occurrence of adhesion between parts and carriers, conveyor and carriers, or between carriers is observed, causing equipment malfunction. There was found.

Furthermore, as a result of the short-circuit movement of the carrier, the carrier near the member cannot be smoothly moved, resulting in a decrease in the efficiency of separation and recovery of dry substances.

The present invention has been made based on the above-mentioned results, and in the drying device described above, the upper edge position of the supply port of the screw conveyor is configured to be lower than the upper peripheral edge position of the member. It is characterized by

That is, with the arrangement described above, the upper edge of the conveyor feed port and the spacing between the parts are such that the carrier is prevented from short-circuiting from the vertical path to the screw conveyor without being subjected to sufficient dry material stripping action. In addition, it can be made to have an appropriate size in accordance with the diameter of the carrier, and as a result, the detection effect on the carrier supporting dry substances can be ensured, improving the recovery rate of dry substances and ensuring smooth operation of the device over a long period of time. It cannot be maintained for a long time.

In particular, when the cylindrical wall part connected to the upper edge of the supply port of the screw conveyor is configured to have a downwardly expanding shape, at the lower end side of the vertical path connected to the conveyor supply port, the carriers around the cylindrical wall in the vertical path are The path can be curved in the circumferential direction, and the inclined plucking counteracts the component force action of the member, further reducing the amount of carriers that take a short path, and improving the action of dry substance plucking. I can do it.

Next, an example will be described in detail based on illustrative figures.

The drying device 1 includes a screw conveyor 2 that lifts the carriers A, and a material to be dried that adheres to the carriers A following the end of the lifting path by this conveyor 2. Supply device 3, carrier A to which the substance to be dried is attached...
A device 4 for dispersing and supplying... While lowering a large number of carriers A... from the dispersion supplying device 4, the carriers A... It consists of a drying chamber 6 for drying the carriers A, and a mechanism 8 for scraping and supplying the carriers A with the dry substances attached to the separating mechanism 7, and the conveyor 2 is used to collect the carriers A...
At the end of the lifting route of the carrier A..., the substance to be dried is attached to the carrier A..., and this is distributed and supplied to the drying chamber 6 to dry the substance to be dried, and the dried substance is transferred to the carrier A... It is configured to continuously dry and recover the substance to be dried by repeating the cycle of separating the dry substance from ... and transferring it to the recovery device 9 and supplying the carrier A ... to the conveyor 2. has been done.

The separation mechanism 7 separates the helical rotor blade 1 from the rotary cylinder body 10.
1 of a conveyor 2 configured to be relatively rotatable; The second
It consists of a separation mechanism 14, of which the second separation mechanism 14 is
It acts to further separate the carrier A from which the dry substance has been peeled off in advance in the first separation mechanism 13, and allows the separated dry substance to pass through slits and small holes that prevent the carrier A from flowing down. At the same time, for guiding the transport carriers A to the conveyor 2, the member 15 is formed into an inverted truncated cone shape, and the truncated end is covered with a bottom plate 17 connected to the rotating shaft 16. The carrier is connected to the drying device cylinder 1a in a state where it is located at the lower end side of the conveyor 2, and the material enters the inverted conical space of the member 15 to form the carrier supply port of the conveyor 2. The cylindrical wall 18 is connected downwardly from the cylindrical body 12 with the cylindrical wall portion at the lower end in the shape of a lower sandwich, and the lower end side of the cylindrical wall 18, that is, between the upper edge of the supply port and the member 15. A passage is formed through which at least one carrier 4, preferably about three carriers A, pass through, so that the extraction is carried out above the member 15, and the transport carrier is placed above the cylindrical wall portion. The carriers A... are transported to the conveyor supply port by forming a vertical path due to the fall of their own weight, and a path that curves outward in the cylindrical wall section by expanding downward. The second separation mechanism 14 is configured to increase the chances of the average introduction and detection of the carrier A to the member 15.

In addition, in the case of a configuration in which the first separation mechanism 13 is driven by a drive system separate from the conveyor 2, or the first separation mechanism itself is not provided, the cylindrical body 10 of the conveyor 2 is extended and It is also possible to use the cylindrical wall 18 as described above.

Further, the bottom plate 17 may be configured to be rotatable relative to the rotating shaft 16, and the bottom plate 17 may be integrally connected to the gripping member 15.

[Brief explanation of the drawing]

The drawings show an embodiment of the drying device according to the present invention, with FIG. 1 being an overall vertical sectional side view and FIG. 2 being a detailed view of the main parts. 2...Screw conveyor, 6...Drying chamber, 7...Separation mechanism, 15...Detected member, A...Transportation carrier .

Claims (1)

[Claims] 1. A drying chamber 6 is provided in which the transport carrier A on which the substance to be dried is attached is dried while being lowered, and the dried substance is separated from the transport carrier A. A mechanism 7 is provided, and a screw conveyor 2 is provided for transporting the separated transport carrier A to be supplied to the drying chamber 6, and a screw conveyor 2 is provided for transporting the separated transport carrier A to supply it to the drying chamber 6. A member 15 is configured to have an inverted truncated conical shape and is provided around the lower end side of the screw conveyor 2 to guide the material A to the screw conveyor 2, and the member 15 is provided around the lower end side of the screw conveyor 2. Conveyance carrier A is placed above 15.
The drying device is provided with a vertical path for lowering the material under its own weight, and is characterized in that the position of the upper edge of the supply port of the screw conveyor 2 is configured to be lower than the position of the upper peripheral edge of the member 15. drying equipment. 2. The drying device according to claim 1, characterized in that a cylindrical wall portion connected to the upper edge of the supply port of the screw conveyor 2 is configured in a downwardly expanding shape.