Vacuum belt drier

Abstract

The invention discloses a vacuum belt drier. The vacuum belt drier comprises a drying bin, a belt conveyor, a heating plate, a vacuum unit, discharging valves and an air guide pipe, wherein one end ofthe air guide pipe is fixedly connected to an exhaust port of the drying bin, the other end of the air guide pipe is fixedly connected to the vacuum unit, the discharging valves are arranged on a feeding port and a discharging port of the drying bin, the belt conveyor is installed in the drying bin, the heating plate is installed below an upper layer conveying belt of the belt conveyor, a heat conduction pipe of a heating device of the heating plate is a straight pipe so that water scale and oil dirt can be conveniently removed through a descaling device, and a heat conduction working mediumdoes not generate water scale and oil dirt during long-time heat conduction and heating inside the heating plate. According to the vacuum belt drier, the heat conduction medium carrying heat energy isused for performing heat conduction and heat dissipation on materials on the upper layer conveying belt through the heating plate, the heat conversion efficiency is high, moreover, the loss is low, the heat conduction and heat exchange speed is improved, the effective utilization rate of heat energy conduction and heat exchange is high, the drying uniformity of the materials is improved, the material drying efficiency is improved, and the material drying effect are optimized.

Description

technical field [0001] The invention relates to a belt dryer, in particular to a vacuum belt dryer. Background technique [0002] The belt dryer is a continuous operation vacuum drying equipment. The current main heating method of the belt dryer is to pass hot water, water vapor mixture or other flowing heating medium into the heating plate under the conveyor belt. The material is on the material conveyor belt. On the upper side, the conveyor belt carries the materials through the heating zone of the heating plate in turn at the set speed, and the heating medium (water, heat transfer oil) in the heating plate below the conveyor belt transfers heat to the materials on the conveyor belt through the heating plate, and the material absorbs The heat evaporates the water, and the water vapor is sucked away by the vacuum system, and the dried material is discharged out of the drying chamber, and the whole drying process is carried out in the vacuum chamber. When the heat-conductin...

AI Technical Summary

Problems solved by technology

When the heat-conducting medium (water, heat-conducting oil) in the heating plate flows and conducts heat in the heating plate for a long time, scale and oil will form on the plate inside the heating plate. The internal structure of the heating plate is complicated, and the scale and oil on the plate of the heating plate It is not easy to clean and descale, and the heating plate with scale and oil will affect the conduction and heat transfer of heat energy

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