Self-heating roller dryer

Abstract

The invention discloses a self-heating roller dryer. The self-heating roller dryer comprises a drying roller, a scraper and a feed liquid plate; the drying roller comprises an outer cylinder, an inner cylinder which is matched with the outer cylinder in a rotating mode and is coaxial with the outer cylinder is arranged inside the outer cylinder, a heat insulation layer, an electrical heating layer and a thin-wall heat conduction layer are sequentially arranged on the peripheral wall of the inner cylinder from inside to outside, heat conduction media are arranged in a cavity between the outer cylinder and the inner cylinder, and a groove used for containing the heat conduction media is annularly and uniformly formed in the peripheral wall of the thin-wall heat conduction layer; the bottom of the outer cylinder is located in the feed liquid plate, and a blade of the scraper is closely attached to the outer surface of the outer cylinder. The self-heating roller dryer can meet the use requirements and effectively improve the heat exchange efficiency.

Description

technical field [0001] The invention belongs to the technical field of drying equipment, in particular to a self-heating drum dryer. Background technique [0002] The drum drying device is a normal-pressure drying equipment that heats the liquid material or slurry attached to the outer wall of the cylinder by heat conduction to vaporize the water. When the drum rotates slowly, the material adheres to the outer surface of the drum in the form of a film, the water is vaporized and scattered in the surrounding air, and the dry material attached to the outer wall is scraped off by the scraper in the form of flakes and falls into the discharge port. Because the heat transfer method of the drum drying device is from the inside to the outside, it has the advantages of uniform material distribution, thin material layer, large temperature gradient and high heat utilization rate, and is widely used in chemical production. [0003] The existing drum heating device generally adopts a h...

AI Technical Summary

Problems solved by technology

Although the heat-conducting oil-type drum drying device can meet the use requirements to a certain extent, it is difficult to discharge the low-temperature heat-conducting oil trapped between the outer cylinder and the inner cylinder in time, resulting in the temperature between the outer cylinder and the inner cylinder Uneven, the drying effect is not good, which is not conducive to energy saving and emission reduction

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