Extraction apparatus

Abstract

The invention discloses an extraction apparatus, belongs to the technical field of extraction, and is designed for solving the problem of nonuniform distribution of extractant in the prior apparatus. The extraction apparatus comprises an air chamber and a first solvent chamber which is sleeved outside the air chamber, the air chamber and the first solvent chamber are placed in a second solvent chamber, the first solvent chamber is used for containing a light phase extractant, the second solvent chamber is used for containing a heavy phase liquid to be extracted, the first solvent chamber and a extractant source which is positioned outside the solvent chamber are communicated, and the air chamber and a gas source which is positioned outside the second solvent chamber are communicated; a side wall of the air chamber is circumferentially and uniformly provided with several gas outlets, a side wall of the first solvent chamber corresponding to the position of the gas outlets is uniformly provided with several first outlets, and each gas outlet is communicated to the inner side of the corresponding first outlet or into the first outlet. In the extraction apparatus, oil gas bubble generation points are uniformly distributed, so that the extractant can be uniformly distributed in the liquid to be extracted with good extraction effects.

Description

technical field [0001] The invention relates to the technical field of chemical separation devices, in particular to an extraction device. Background technique [0002] Solvent extraction is an important chemical separation technology, which has the advantages of high separation efficiency and easy operation, and is widely used in petrochemical, pharmaceutical, hydrometallurgy, environmental treatment and other fields. The solvent extraction process involves the reaction and mass transfer process between the two immiscible liquid phases. To achieve uniform mixing of the two immiscible liquid phases, one of the phases must be uniformly dispersed into the other phase. This provides a larger two-phase contact area. Traditional extraction equipment is divided into three categories: mixing-clarifying extraction tank, tower extractor, and centrifugal extractor. These equipment can realize the two phases of water and oil that are immiscible in the extraction process are mixed firs...

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Problems solved by technology

However, the realization of this method depends on the condensation rate of kerosene hot steam in the aqueous solution, and the thickness of the oil film on the surface of the generated bubble-in-oil dispersed phase cannot be controlled, and a stable bubble-in-oil dispersed phase cannot be obtained.

Although the existing technology also proposes a technical solution using a nested structure of inner and outer tubes, the inner tube blows gas and the outer tube supplies the oil phase, and disperses the small-volume oil phase with air bubbles, which can directly produce an oil film coated with an oil film in the aqueous solution Bubble-containing dispersed phase, the dispersion state of the small-volume oil phase in the large-volume water phase is easy to control artificially. However, the oil bubble distribution generator proposed in it cannot or is difficult to achieve uniform distribution of the oil chamber and the air chamber. In actual operation It is difficult to get evenly dispersed oil bubbles in

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