RU1836609C - Drum type for thermosensitive granular materials - Google Patents

Abstract

Usage: the invention relates to the technique of vacuum drying bulk materials and can be used in food enterprises and other industries of the processing industry to increase the productivity of the dryer. SUMMARY OF THE INVENTION: The housing is provided with a vacuum system. The drum is equipped with several spiral inserts located at a certain distance from each other, forming a loading slot. External turns of spiral inserts are fixed on the inner surface of the drum. Unloading points are located under the last turns. 3 ill.

Description

The invention relates to techniques for vacuum drying bulk materials and can be used in food processing plants and other processing industries.

An object of the invention is to increase the productivity of a dryer.

In FIG. 1 shows a general view of a drum dryer; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a section along BB in FIG. 2.

The installation comprises a cylindrical housing 1 connected to the vacuum pump and the condenser of water vapor through the pipe 2, loading and unloading bins 3 and 4, connected to the vacuum system through the pipes 5 and 6 and connected to the housing 1 by valves 7 and 8, respectively, a horizontal drum 9, equipped with spiral perforated inserts 10 with discharge chutes 11, infrared heaters 12, a wet material storage 13 with a cd ujHeck feeder 14, a dried material storage 15.

The dryer operates as follows.

Bulk material through the shutter 7 from the pre-evacuated loading hopper 3 by gravity enters the evacuated housing 1 into the screw feeder 14, which is then fed into the drive 13 and from there through the slot 16 between the spiral inserts falls on the inner surface of the outer coil of the spiral insert 10, which is currently in front of the slit 16. When the drum 9 is rotated at an angular speed of 0.01-0.05 rpm, each spiral insert 10 through the slit 16 will pass through the slit 16 under the drive 13 A serving of wet product.

With further rotation of the drum 9, the material rolled along the turns of the spiral inserts 10 under the infrared heaters 12 is transferred to the inner turns and dried. From domestic

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turns, the product enters the discharge chutes, which are inclined towards the discharge side, through which it is poured into the accumulator 15 connected by a shutter 8 to the discharge hopper 4. Water vapor and non-condensing gases are sucked off by a vacuum pump.

Installation Advantages:

continuous drying process, increased productivity;

intense heat and mass transfer;

rational use of the internal volume of the drum;

the possibility of a mild drying mode.

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Claims (1)

SUMMARY OF THE INVENTION A drum dryer for heat-sensitive bulk materials, comprising a housing with loading and unloading devices in which the drum is mounted to rotate about its longitudinal axis, infrared heaters, characterized in that, in order to increase productivity, the housing is equipped with a vacuum system, the drum is equipped with several spiral inserts located at a certain distance from each other, forming a gap for loading, and the outer turns of the spiral inserts are closed epleny on the inner surface of the drum, and under the last winding disposed unloading chutes. i KB & QUM pump 10 YU To the lcd pump " Phi Figure 2 Figz