Vacuum belt drier with material stirring function

Abstract

The invention discloses a vacuum belt drier with a material stirring function. A drying bin, a belt conveyor, a heating device, a vacuum unit, an unloading valve, a feeding hopper, an air guiding pipe, a stirring device, material guiding plates and a material guiding side plate are included. One end of the air guiding pipe is fixedly connected to an exhaust port of the drying bin, and the other end of the air guiding pipe is fixedly connected to the vacuum unit. The material guiding side plate is arranged at the lower end of the heating device. Heat conduction media carrying heat energy conduct heat conduction and dissipation on materials on an upper-layer conveying belt through the heating device, the stirring device and a lower heating plate at the same time, the heat conversion efficiency is high, consumption is little, the heat conduction and exchange speed is increased, and the conduction heat exchange effective usage rate of the heat energy is high. Under the transmission inertiaaction of the conveying belt and guidance of the stirring device for the materials, when the materials move, original static stacking of the materials is changed, overturning moving of the materialswithin the left-right narrow range is conducted, heat radiation and heat conduction heating on different positions of the materials through the heat energy can be improved, the material drying efficiency is improved, and the material drying effect is optimized.

Description

technical field [0001] The invention relates to a vacuum belt dryer, especially a vacuum belt dryer with the function of stirring materials. Background technique [0002] The vacuum belt dryer is a continuous operation vacuum drying equipment. The current main heating method of the vacuum belt dryer is to feed hot water, water vapor mixture or other flowing heat transfer medium into the heating plate under the upper conveyor belt. On the material conveyor belt, the conveyor belt carries the material through each heating zone in turn at a set speed, and the heat transfer medium (steam, hot water) in the heating plate under the upper conveyor belt transfers heat to the material on the conveyor belt through the heating plate. The material absorbs heat to evaporate the moisture, 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. [0003] Since the...

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Problems solved by technology

[0003] Since the lower heating plate of the vacuum belt dryer is installed under the upper conveyor belt, the conduction heat of the lower heating plate (the material is on the upper surface of the upper conveyor belt) will be due to the single-sided contact of the material with the heat medium (conveyor belt) in the later stage of drying. , the drying rate of the material on the upper surface is slow, and the material on the upper conveyor belt is dried by static conveying stacked together, which will cause uneven drying of the material and affect the drying effect of the material

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