Extraction kettle with fluid distributor

Abstract

The invention relates to an extraction kettle with a fluid distributor, aiming at solid raw materials, in particular raw materials prone to be hardened with small grain diameter. The device has the advantages of balancing flow field distribution in the extraction kettle, intensifying the mass transfer effect and improving extraction effect with low cost and low device improving cost. The invention adopts the technical scheme that the extraction kettle with the fluid distributor comprises a cylinder with an inlet and an outlet, the cylinder is internally provided with the fluid distributor which comprises a main shaft pipe and at least a layer of branch pipes; the top end of the main shaft pipe is sealed and the bottom is opened and connected with the inlet of the cylinder; each layer of branch pipes at least comprises a branch pipe perpendicular to the main shaft pipe and communicated with each other inside; a plurality of through holes penetrating through the upper and lower walls or the left and right walls of the branch pipe are arranged on the branch pipe at intervals; and the rear end of the branch pipe is sealed.

Description

technical field [0001] The patent of the present invention relates to the field of supercritical fluid extraction, in particular to an extraction kettle for extracting solid raw materials (such as crushed particles and powders of various natural products such as plant flowers, Chinese medicinal materials, and economic crops). Background technique [0002] Supercritical fluid extraction technology is a new chemical separation technology developed in the past 30 years. A fluid is said to be in a supercritical state when its temperature and pressure are above its critical temperature and pressure. The fluid in the supercritical state, its gas-liquid interface disappears, no longer divided into gas and liquid, the properties of the fluid become uniform, and have some characteristics of gas and liquid at the same time. For example, the density of supercritical fluid is equivalent to that of liquid, the viscosity is still close to that of gas, and the diffusion coefficient is bet...

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Problems solved by technology

When extracting solid raw materials, the existing shortcomings are: the supercritical fluid directly enters the kettle from the inlet of the extraction kettle to contact and mass transfer the raw materials, and after the raw materials are crushed and packed into the extraction kettle in a stacked manner, as the particle diameter decreases, Small, easy to form a high-density bed, block the flow channel of the supercritical fluid, form a "channel flow" phenomenon, and increase the flow resistance, reduce the mass transfer efficiency, increase the pretreatment cost of raw materials, and due to incomplete extraction resulting in wastage of raw materials

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