Electric heating biconical vacuum dryer

Abstract

The invention discloses an electric heating biconical vacuum dryer, which comprises a biconical container. A layer of electric heating plate is covered on the surface of the biconical container, and heat preservation cotton is arranged outside the electric heating plate. The electric heating plate adopts a ceramic plate or a cast aluminum plate arranged between inner and outer casings of the biconical container, heating wires are arranged in the electric heating plate, and the ceramic plate or the cast aluminum plate is easy to disassemble or change. A binding post is arranged on one side of the central axis of the biconical container, and a rotary conducting ring is fixed on the outer wall of the container on the side. A vacuum tube used for exhausting air is arranged on the other side of the central axis of the biconical container, and an evacuated housing made of a stainless steel sintered filter screen is arranged on the vacuum tube in a suction position where the vacuum tube is led into the tail end, which is used for filtering impurities and exhausting air into the container so as to ensure that material is at a vacuum state. The electric heating biconical vacuum dryer performs drying through an electric heating mode, overcomes the disadvantage that the temperature rise effect is poor because formerly conduction oil is used for heating for a long time and oil dirt is generated, and has the advantages that the temperature rise speed is high after improvement, the electric heating biconical vacuum dryer is convenient to regulate and control and simple to operate, and the service life is long.

Description

technical field

[0001] The invention relates to a dryer, in particular to an electric heating double-cone vacuum dryer. Background technique

[0002] The heat medium used in existing double-cone vacuum dryers is generally hot water, low-pressure steam or heat-conducting oil. The heat is transferred to the material to be dried through the inner shell. Driven by power, the tank body rotates slowly, and the material in the tank continuously Mixing, so as to achieve the purpose of strengthening drying. When using the above-mentioned hot water, low-pressure steam or heat-conducting oil medium for heat transfer, the temperature tends to drop after long-term use, resulting in a large amount of heat loss. This kind of dryer usually uses non-woven fabric to pass through the filter screen, which is easy to cross-contaminate the dried materials and affect the purity of the materials. Contents of the invention

[0003] In order to overcome the defects of the above-mentioned prior ar...

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