A multi-layer extrusion supercritical extraction kettle

Abstract

A multi-layer extrusion supercritical extraction kettle is provided with a water bath cylinder on a support, 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 the support is arranged at the bottom of the outer cylinder. The upper end of the side wall of the outer cylinder is provided with an air inlet pipe, 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 inner wall of the inner cylinder is smooth, the bottom of the inner cylinder is provided with an inner cylinder bottom cover, and the inner cylinder There is an inner cylinder seal on the contact surface between the bottom cover and the inner wall of the outer cylinder, the inner cylinder is filled with materials, a filter layer is arranged between the bottom cover of the inner cylinder and the material, a filter layer is arranged on the top of the material, and a thrust plate is arranged on the top of the filter layer , the thrust plate is connected with the piston end of the hydraulic cylinder through the thrust spring unit penetrating the top cover, a top cover seal is arranged between the thrust spring unit and the top cover, and the hydraulic cylinder is connected with the hydraulic pump through a solenoid valve; the invention has a simple structure , Easy to operate, no need to turn over the inner cylinder, save manpower and material resources, and can be popularized 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 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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