Self-tightening multi-layer supercritical extraction kettle

Abstract

The invention discloses a self-tightening multi-layer 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, an oil outlet pipe penetrating through the bracket is arranged at the bottom of the outer cylinder, an inner cylinder bottom cover is arranged at the bottom end of the inner cylinder, a filter layer is arranged between the inner cylinder bottom cover and a material, a filter unit is arranged at the top of the material, a check valve is arranged on thefilter unit, a filter layer is arranged at the lower end of the filter unit, filter layer seals are arranged between the filter layers and the inner cylinder, an air inlet pipe is arranged on the sidewall of the outer cylinder, the upper edge of the inner cylinder is machined to be in a zigzag shape to ensure the smooth entry of gas into the inner cylinder, an inner cylinder seal is arranged between the inner cylinder bottom cover and the inner bottom of the outer cylinder, a top cover is arranged at the top of the outer cylinder, and an outer cylinder seal is arranged between the top cover and the outer cylinder. The self-tightening multi-layer supercritical extraction kettle is simple in structure and convenient to operate, the inner cylinder does not need to be turned over, manpower and material resources are saved, and the self-tightening multi-layer supercritical extraction kettle 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 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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