Multilayer disc type centrifugation and gravity film forming and differential speed pressure reduction low-temperature evaporation device

Abstract

The invention relates to a multilayer disc type centrifugation and gravity film forming and differential speed pressure reduction low-temperature evaporation device, which comprises a tube body, a center shaft, a plurality of rotary conical surface disc assemblies and fixed conical surface disc assemblies, wherein the rotary conical surface disc assemblies and the fixed conical surface disc assemblies are in separated and laminated arrangement; a material liquid feeding connecting pipe and an evaporation gas guide-out connecting pipe are arranged above the tube body; a heating gas guide-in connecting pipe is arranged under the tube body; the material liquid alternately forms continuous film layer flowing on the inner surfaces of the rotary and fixed conical surface discs so that the saturated vapor pressure value of the film layer solution is improved; the gas on the surface of the material liquid film layer in a conical annular gap between the separated rotary and fixed conical surface discs form a sliding difference speed for reducing the pressure on the film layer gas-liquid interface, so that the solution with the saturated vapor pressure value with the environment pressure lower than the film layer solution can be favorably evaporated. The multilayer disc type centrifugation and gravity film forming and differential speed pressure reduction low-temperature evaporation device has the advantages that the volatile ingredient low-temperature and efficient evaporation of the material liquid can be realized; through being matched with a condensing and gas-liquid separating device, the distillation and extraction operation can be realized.

Description

technical field [0001] The invention relates to the technical field of evaporative separation or concentration of liquid mixtures, and more specifically relates to a low-temperature evaporation device for multi-layer disc centrifugal and gravity film formation and differential decompression. 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, the volatile liquid phase in the liquid mixture is heated to vaporize, so that the liquid becomes vapor, that is, the so-called evaporation. [0003] During the evaporation process, the volatile components are concentrated in the vapor, and the less volatile components are also concentrated in the residual liquid, which realizes the separation of different components to a certain extent. The greater...

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Problems solved by technology

However, most of the film evaporators in the prior art are vertical, and the flow rate of the feed liquid in the evaporator cylinder is relatively fast, which easily leads to insufficient evaporation of volatile components, which affects the evaporation effect to a certain extent.

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