Internal heating type drum dryer

Abstract

The invention discloses an internal heating type drum dryer which comprises a drum drying bin, a gear ring, a heating tank, a feeding device, an exhaust device, a three-way device, a support, a driving device, a medium, supporting wheels and a heat insulation layer. The drum drying bin is driven by the driving device, the drum drying bin is supported by the supporting wheels on the support to moverotationally, the drum drying bin comprises a drum, spiral blades, a heating pipe and fixing strips; and the heating pipe comprises a metal pipe, a heat conducting working medium and a heating device. The lower half part of the drum drying bin is immersed in a medium in the heating tank, the heat dissipation area of a heater with the heating strips is increased by 8-35 times, the heat conductingworking medium carries out heat conduction and exchange of liquid-vapor phase change in an inner cavity of the pipe, the heat energy in the heating tank carries out heat conduction heating on materials through a drum body in the drum of the drum drying bin and the heating pipe on the drum body, and the drying quality of the materials in the drum drying bin is uniform. The material drying efficiency is improved, the material drying effect is optimized, and environment-friendly drying and energy conservation; environmental protection are achieved.

Description

technical field [0001] The invention relates to a tumble dryer, in particular to an internal heating tumble dryer. Background technique [0002] At present, the heat exchange of the drum drying chamber of the drum dryer on the market mostly uses the secondary heat exchange of the heat exchanger as hot air, and the drum drying chamber uses hot air to heat the material by heat conduction, but their heaters are large in size and small in heat dissipation area. Inefficient use. The heating tube of the tubular drum drying bin and the cylinder welding joint of the drum drying bin are also susceptible to air leakage damage caused by welding stress and stress generated by corrosion products. The heating tube is worn by the material during the drying process of heat conduction and heat exchange materials. , there is a leakage of a heating tube, the heating tube is not easy to repair, resulting in the drum drying chamber of the entire drum dryer cannot be used normally. [0003] The...

AI Technical Summary

Problems solved by technology

The heat conduction area of ​​the lower end of the heating pipe is limited, and the metal plate surface of the pipe head with a small heat exchange area only inputs a small amount of heat. The heat conduction working medium has a limited heating area, which affects the heat conduction of heat energy to the heat conduction working medium in the inner cavity of the tube. Heating, resulting in insufficient total heat energy of the heat-conducting working medium, causing the heating tube to fail to output a large amount of heat energy, and the materials in the drum cannot get enough heat energy, which affects the drying speed of the materials in the drum dryer

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