A self-tightening multi-layer supercritical extraction kettle

Abstract

A self-tightening multi-layer supercritical extraction kettle, a water bath cylinder is arranged on a bracket, an outer cylinder is arranged inside the water bath cylinder, an inner cylinder is arranged inside the outer cylinder, and an oil outlet pipe penetrating the bracket is arranged at the bottom of the outer cylinder. The bottom of the inner cylinder is provided with an inner cylinder bottom cover, a filter layer is provided between the inner cylinder bottom cover and the material, a filter unit is provided on the top of the material, a check valve is provided on the filter unit, and a filter layer is provided at the lower end of the filter unit. There is a filter layer seal between the layer and the inner cylinder, an air inlet pipe is arranged on the side wall of the outer cylinder, and the upper edge of the inner cylinder is processed into a sawtooth shape to ensure that the gas enters the inner cylinder smoothly. The inner cylinder is sealed, the top of the outer cylinder is provided with a top cover, and the outer cylinder is sealed between the top cover and the outer cylinder; the invention has simple structure, convenient operation, no need to turn the inner cylinder, saves manpower and material resources, and can be extended and applied to the field of supercritical extraction .

Description

technical field [0001] The invention belongs to the technical field of physical separation devices or equipment, and in particular relates to a self-tightening multilayer supercritical extraction kettle. Background technique [0002] Supercritical fluid refers to when the substance is in a state above its critical temperature and critical pressure. At this time, the gas in this state is pressurized, and the gas will not be liquefied, but its density will increase. It has properties similar to liquid, while retaining the performance of gas . Supercritical fluid has the advantages of both gas and liquid. Its density is close to that of liquid, its solubility is strong, its viscosity is similar to that of gas, and its diffusion coefficient is much larger than that of ordinary liquid, which is conducive to mass transfer. In addition, supercritical fluid has zero surface tension, and it is easy to permeate and diffuse into the micropores of the extracted material. Therefore, su...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing supercritical extraction device in the extraction process, the extraction efficiency decreases continuously with the thickening of the filter cake layer, and the rapid dissipation of the extraction agent due to the secondary loosening of the raw material structure in the middle of the extraction, Provide a self-tightening multi-layer supercritical extraction kettle with reasonable design, simple structure, high extraction efficiency and convenient operation

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