Stirring and heating type drum dryer

Abstract

The invention discloses a stirring and heating type drum dryer. The stirring and heating type drum dryer comprises a drying drum, a scraping knife and a liquid material disc. The drying drum comprises an outer drum body. An inner drum body which is rotationally matched with the outer drum body and is coaxial with the outer drum body is arranged in the outer drum body. 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 drum body from inside to outside. A medium cavity used for storing a heat conduction medium is arranged between the outer drum body and the inner drum body. A stirring structure for stirring the heat conduction medium is evenly and annularly distributed on the peripheral wall of the thin wall heat conduction layer and comprises stirring teeth arranged on the peripheral wall of the thin wall heat conduction layer in an array manner. The bottom of the outer drum body is located in the liquid material disc. A knife edge of the scraping knife is tightly attached to the outer surface of the outer drum body. The stirring and heating type drum dryer has the beneficial effects that the heat conduction efficiency is high, and heating is uniform.

Description

technical field [0001] The invention belongs to the technical field of drying equipment, in particular to a stirring and 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 ad...

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

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