Multi-layer extrusion type supercritical extraction kettle

Abstract

The invention belongs to a multi-layer extrusion type supercritical extraction kettle. A water bath cylinder is arranged on a bracket, an outer cylinder is arranged in the water bath cylinder, an inner cylinder is arranged in the outer cylinder, and an oil outlet pipe penetrating through the bracket is arranged at the bottom of the outer cylinder; an air inlet pipe is arranged at the upper end ofthe side wall of the outer cylinder; a top cover is arranged at the top of the outer cylinder, an outer cylinder seal is arranged between the top cover and the outer cylinder, the inner wall of the inner cylinder is smooth, an inner cylinder bottom cover is arranged at the bottom end of the inner cylinder, an inner cylinder seal is arranged on the contact surface of the inner cylinder bottom coverand the inner wall of the outer cylinder, the inner cylinder is filled with materials, a filter layer is arranged between the inner cylinder bottom cover and the material, the filter layer is arranged at the top of the material, and a thrust plate is arranged at the top of the filter layer; and the thrust plate is connected with the piston end of a hydraulic cylinder through a thrust spring unitpenetrating the top cover, and a top cover seal is arranged between the thrust spring unit and the top cover, and the hydraulic cylinder is connected with a hydraulic pump through an electromagnetic valve. The multi-layer extrusion type supercritical extraction kettle is simple in structure and easy to operate, the inner cylinder is not required to be overturned, manpower and material resources are saved, and the multi-layer extrusion type supercritical extraction kettle can be 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 multi-layer extrusion 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, supercr...

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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 multi-layer extrusion supercritical extraction kettle with reasonable design, simple structure, high extraction efficiency and convenient operation

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