Continuous belt-clamping type thin material layer microwave evaporation method and device

Abstract

The invention provides a continuous belt-clamping type thin material layer microwave evaporation method and a continuous belt-clamping type thin material layer microwave evaporation device. A solid and liquid mixture is oppositely clamped between two endless filtering net belts by a pair of upper clamping roller and lower clamping roller which revolve to form an oppositely clamping material layer structure of the upper filtering net belt, a solid and liquid mixture layer and the lower filtering net belt; through a microwave resonant cavity in a horizontal reciprocating and layer-by-layer raising transportation way, the solid and liquid mixture material liquid in the oppositely clamped material layer absorbs microwave energy in a uniform thin layer state to be heated and evaporated; meanwhile, the evaporation capacity is improved by circularly loading a nozzle of isolation material liquid, the vacuum degree in an evaporator is improved by a feeding and discharging sealing structure, and the material liquid is effectively translated to gas phase at a relatively low temperature. Furthermore, due to the adoption of the oppositely clamping material layer in a multi-layer transportation state, the heat exchange specific surface area is increased; due to the fact that an evaporation device is compact, the area utilization rate is high; distillation operation and extraction operation can be realized by matching the evaporation device with a condensation and gas-liquid separation device.

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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