A continuous entrainment thin material layer microwave evaporation method and device

Abstract

The invention provides a continuous entrainment thin material layer microwave evaporation method and device, using a pair of rotating upper and lower nip rollers, through two endless filter belts, the solid-liquid mixture is sandwiched between the filter belts Between them, the structure of the upper filter belt, the solid-liquid mixture material layer and the lower filter belt is formed, and the microwave resonator is passed through the microwave resonant cavity in a horizontal back-and-forth layer-by-layer transport mode, so that the material in the pair of sandwich layers The solid-liquid mixture material liquid absorbs microwave energy in a uniform thin layer state and is heated and evaporated. At the same time, the evaporation rate is increased by circulating loading on the nozzle of the separated material liquid, and the sealing structure of the material inlet and outlet is used to improve the evaporation rate. The vacuum degree in the evaporator makes the feed liquid efficiently transform into gas phase at a lower temperature. In addition, due to the use of multi-layer transport state, the specific surface area of ​​heat exchange is increased, the evaporation device is compact, and the area utilization rate is high. With the condensation and gas-liquid separation device, distillation and extraction operations can be realized.

Description

technical field [0001] The invention relates to the technical field of evaporative separation or concentration of solid-liquid mixtures, and more specifically relates to a continuous entrainment thin material layer microwave evaporation method and device. Background technique [0002] Liquid molecules have a tendency to escape or volatilize from the surface of the liquid phase due to molecular motion, and this tendency increases with the increase of temperature. Utilizing the difference in volatilities of the components in the liquid mixture or solid-liquid mixture, the volatile liquid phase in the liquid mixture or solid-liquid mixture is heated to gasification, so that the liquid becomes vapor, which is called evaporation. [0003] During the evaporation process, the volatile components are concentrated in the vapor, and the less volatile components (including the solid phase) are also concentrated in the remaining liquid, which realizes the separation of different compone...

AI Technical Summary

Problems solved by technology

The existing problem is that since the single-layer conveyor belt is used, not only the thickness and uniformity of the accumulation layer are not controlled, but also the upper surface of the conveyor belt can only be used to carry the material, and the material can only be transported through the narrow and long cylindrical cracker at one time. warehouse, the area utilization rate of the device is too low, and at the same time, its open inlet and outlet, it is also difficult to form a vacuum in the cylindrical cracking chamber, which is not conducive to decompression evaporation

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