Continuous supercritical fluid extraction device with flat rotation type feeding opening

Abstract

The invention discloses a continuous supercritical fluid extraction device with a flat rotation type feeding opening. The extraction device comprises a bottom frame, wherein the bottom frame is provided with a main shaft; at least three extraction kettles are uniformly distributed in the circumferential direction which takes the main shaft as the axis; the extraction kettles are connected with the main shaft by radial rods; the main shaft is internally provided with a cavity; the cavity is internally provided with a vertical rod; the lower end of the vertical rod is connected with a motor; the upper end of the vertical rod is connected with a feeding machine; a feeding opening of the feeding machine and the vertical rod are coaxially arranged. The device is compact and reasonable in structure; energy can be greatly saved and the consumption can be greatly reduced; a pipeline line is simplified and factory space is saved; the utilization rate and the extraction efficiency of supercritical carbon dioxide are obviously increased.

Description

technical field [0001] The invention relates to a supercritical fluid extraction device, in particular to a continuous supercritical fluid extraction device with a parallel-rotating feeding port. Background technique [0002] In the industrial production of biomass liquid fuel extraction, the supercritical fluid extraction method is often used to extract the material. The main working method is to inject carbon dioxide that reaches the supercritical temperature and supercritical pressure into the extraction kettle. The material inside is extracted. In the supercritical state, the supercritical carbon dioxide is contacted with the substance to be separated, so that it selectively extracts the components of polarity, boiling point and molecular weight in sequence. The extraction performance of the method is high, the obtained product has no residue doping, is of high quality, and the price of carbon dioxide is economical and affordable, so the extraction technology has been w...

AI Technical Summary

Problems solved by technology

[0006] First of all, since the extraction kettle is large in size and made of steel, it is heavy, and the spindle needs to drive all the extraction kettles to rotate together when it is working, so the power consumption of the spindle motor is extremely high, resulting in excess capacity in the extraction operation and increased Economic cost and energy consumption

[0007] Second, because the kettle body rotates horizontally during the extraction operation, the solvent inlet and outlet pipes, pressure relief pipes and other pipes connected to the outside of the extraction kettle must also rotate accordingly. In order to avoid collisions between the pipes or between the pipes and other parts of the device, The design of each pipeline line is very complicated, and it takes up a large space in the factory building. It is also very difficult to repair if a certain part of the pipeline fails.

[0008] Third, during the extraction process, each extraction kettle needs to complete a complete set of procedures of "feeding, extraction, and discharging" under the feeder before it can be the turn of the extraction kettle at the next station to carry out the extraction work, reducing the internal pressure of the kettle. The utilization rate of carbon dioxide and production efficiency are also greatly affected

[0009] Fourth, although quick opening and closing valves or joints can be set on the top cover and the bottom cover of the extraction kettle to realize the rapid opening and closing of the top cover and the bottom cover, the feeding and unloading time is still long, which is different from that of the prior art. Compared with the progress is not very obvious

[0010] Fifth, since the supercritical carbon dioxide circulates in each kettle body after connecting the extraction kettles in series, the supercritical carbon dioxide fluid in the kettle body will partially leak out during the opening and closing process of the top cover and the bottom cover of the extraction kettle body, resulting in supercritical carbon dioxide in the kettle body. The pressure and temperature of the carbon dioxide fluid change greatly, which affects the utilization rate of the supercritical carbon dioxide fluid

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