Supercritical extraction separation kettle, extraction system and extraction method

Abstract

The invention discloses a supercritical extraction separation kettle, an extraction system and an extraction method. The supercritical extraction separation kettle comprises a kettle body and a top cover, and further comprises an annular extraction layer, an annular porous medium layer and a cyclone separator which are sequentially arranged in the kettle body in a sleeved mode from outside to inside. On one hand, such an annular layered structure enables an extraction agent to complete extraction in an internal rotation flowing mode, so a contact area between the extraction agent and an objectto be extracted in the flowing process of the extraction agent is increased, and extraction yield is greatly increased; on the other hand, the space utilization rate in the extraction kettle is increased, and the common wall flow problem in the supercritical extraction process is avoided; meanwhile, a flow field in the extraction separation kettle is more uniform and stable by designing the orientation of air inlet holes and arranging an arc-shaped flow guiding plate. The supercritical extraction separation kettle of the invention has three functions including extraction, pressure reduction,and separation and purification, and can realize high-quality and high-efficiency bioactive component extraction and cyclic reutilization of the extraction agent.

Description

technical field [0001] The invention relates to the technical field of supercritical extraction, in particular to a supercritical extraction separation kettle, an extraction system comprising the extraction separation kettle, and an extraction method for extracting biologically effective components at low temperature using the extraction system. Background technique [0002] When the pressure and temperature of the fluid exceed the value corresponding to its critical point, the fluid enters a supercritical state. At this time, the force between the fluid molecules is between the liquid and the gas molecules, and the fluid will simultaneously exhibit a high temperature similar to that of a liquid. Density, good solubility and fluidity, as well as low viscosity and good diffusivity similar to gas, can be used as a very ideal extraction agent. At present, more than 90% of the supercritical extraction process is carried out using carbon dioxide, the main reason is that the criti...

AI Technical Summary

Problems solved by technology

The currently used supercritical extraction circulation device mainly has the following problems: ①The extraction, separation, and purification processes require many components, and the actual circulation takes up a lot of space; ②The traditional hollow belt extraction kettle has low space utilization and direct flow The structure is easy to form wall flow and reduce the flow stability; ③The parts are complicated and the disassembly process is cumbersome

It is the existence of these problems that the extraction efficiency in actual production is greatly limited

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