Conjoined balanced-pressure continuous extraction device capable of controlling bubble size of air-assisted solvents

Abstract

The invention discloses a conjoined balanced-pressure continuous extraction device capable of controlling the bubble size of air-assisted solvents, and relates to the field of solvent extraction. Theextraction device is divided into an upper region and a lower region by a bubble redistribution plate: for the upper region, a lower liquid phase (water phase) storage region is sequentially providedwith a venting air outlet, a solvent phase outlet and a water phase outlet from top to bottom; for the lower region, an air-assisted solvent bubble generating portion is internally provided with a magnetic stirring device; the bottom of the air-assisted solvent bubble generating portion is connected with an air pump and a solvent pump through a pipeline; an air inlet connected with the air pump islower than a solvent inlet connected with the solvent pump in position, and the air inlet is smaller than the solvent inlet in diameter to form a nested structure; the bubble redistribution plate isof a replaceable structure, and the pore size and density of the bubble redistribution plate can be designed and regulated according to the working system. The extraction device has the advantages that efficient separation in continuous extraction of the air-assisted solvents can be achieved, and the extraction device is simple in structure, and convenient and rapid to mount and maintain.

Description

technical field [0001] The invention relates to the field of solvent extraction in the field of chemistry and chemical engineering, in particular to a continuous extraction device with one body and the same pressure, which can control the size of gas-assisted solvent bubbles. Background technique [0002] Extraction technology is a relatively traditional separation technology, usually liquid-liquid extraction, widely used in petrochemical, metallurgical environmental protection, pharmaceutical and biochemical engineering fields. However, with the advancement of chemical and chemical production levels, the requirements for separation technology are getting higher and higher. The specific performance is that the separation system is becoming more and more complex, the properties of the separation target components are getting closer, and the concentration of the components to be separated is getting closer and closer. Therefore, some new extraction techniques are constantly em...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a continuous extraction device and operation method with continuous pressure and controllable gas-assisted solvent bubble size. Firstly, the device is assisted by the gas phase to entrain the extraction solvent to increase the contact area between the extraction phase and the extracted phase. Thereby reducing the amount of extractant, especially suitable for the enrichment of ionic precious metal substances and hydrophobic organic substances in the ultra-dilute solution system; at the same time, the solvent extraction phase and the extracted phase of the equipment are in the same pressure system, which solves the problem of the central point of the tower kettle during the amplification process. The problem of excessive pressure ensures that the bubbles of the extractant are evenly distributed in the extracted phase; finally, the equipment has a simple structure and is easy to install, which greatly reduces the cost of equipment assembly and operation and maintenance, and can effectively improve the separation effect of the lower liquid phase

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