A kind of supercritical extraction kettle capable of continuous feeding and discharging and extraction method

Abstract

The invention provides a supercritical fluid extraction kettle with a function of continuous feeding and discharging. An extraction kettle body is arranged on a support, a water bath cylinder is arranged outside the extraction kettle body, a top cover is arranged on the top of the extraction kettle body, at least two feeding pipes, feeding valves are arranged on the feeding pipes, feeding end covers of the feeding pipes are installed at the ends of the feeding pipes, a push rod with a push plate at the lower end is arranged in the center of the top cover, a push rod gear is arranged on the push rod, the push rod gear is meshed with a motor gear on an output shaft of a motor, the tail end of the push rod is connected with a piston rod of a hydraulic oil cylinder, and the hydraulic oil cylinder is connected with a hydraulic pump through an electromagnetic valve. At least two dreg discharging pipes are arranged on the bottom of the extraction kettle body, dreg discharging valves are arranged on the dreg discharging pipes, dreg discharging end covers with outlet pipes are arranged at the ends of the dreg discharging pipes, and filter layers are arranged between the dreg discharging pipes and the dreg discharging end covers. The supercritical fluid extraction kettle is simple in structure, convenient to operate and capable of achieving continuous extraction, saving manpower and material resources and being applied and popularized to the field of supercritical fluid 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 capable of continuously feeding and discharging materials and an extraction method. 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 ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of cumbersome operations such as shutdown, pressure release, cover opening, secondary charging, and re-pressurization when taking out the slag during the extraction process of the existing supercritical extraction device, and provides a Supercritical extraction kettle and extraction method with reasonable design, simple structure, high extraction efficiency and convenient operation, which can continuously feed and discharge materials

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