Supercritical extraction kettle for extracting low-fat material

Abstract

The invention discloses a supercritical extraction kettle for extracting a low-fat material. According to the supercritical extraction kettle, a water bath cylinder is arranged on a bracket; an outercylinder 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; a gas inlet pipe is arranged at the upper end of the side wall of the outer cylinder; an extraction agent is diffused from top to bottom; extracted grease is discharged from the oil outlet pipe; a top cover is arranged at the top of the outer cylinder; a projection at the lower end of the top cover is connected to the upper end of a thrust spring unit; the lower end of the thrust spring unit isconnected to a thrust round table; 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 cover and the inner wall of the outer cylinder; the inner cylinder is filled with a material; and a filtering layer is arranged between the inner cylinder bottom cover and material. According to the invention, the supercritical extraction kettle is simple in structure and convenient to operate, saves 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 supercritical extraction kettle for low-fat material extraction. 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. Therefor...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem that in the extraction process of the existing supercritical extraction device, with the continuous reduction of the oil content of the raw material, the secondary loosening of the raw material structure occurs in the middle of the extraction, which leads to the rapid dissipation of the extraction agent and the reduction of the extraction efficiency. The disadvantage is to provide a supercritical extraction kettle for fat extraction of low-fat materials with reasonable design, simple structure, high extraction efficiency and convenient operation

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