Extraction device

Abstract

The invention discloses an extraction device comprising an emulsifying machine (1) and a phase-splitting apparatus (2). The emulsifying machine (1) is provided with an emulsifying machine inlet (3) and an emulsifying machine outlet (4), the phase-splitting apparatus (2) is provided with a mixed phase inlet (5), a heavy phase outlet (6) and a light phase outlet (7), the emulsifying machine inlet (3) is connected with an extracted object inlet (8) and a solvent inlet (9), and the emulsifying machine outlet (4) is connected with the mixed phase inlet (5) of the phase-splitting apparatus. When multistage extraction devices are combined, the light phase outlet of the phase-splitting apparatus in the extraction device at the current level is connected with the solvent inlet of the extraction device at the next level through a pipeline provided with a pump, and the heavy phase outlet of the phase-splitting apparatus in the extraction device at the next level is connected with the extracted object inlet of the extraction device at the current level through the pipeline provided with the pump. The invention has high extraction efficiency, small size, less occupied area, simple operation and capability of saving apparatus investment and running cost.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to an extraction device. Background technique [0002] Extraction is a way to achieve mass transfer between two liquid phases in the chemical industry. At present, the chemical equipment used in the extraction process in wet phosphoric acid purification is mainly as follows: multi-stage mixing-settling tank, which is a typical step-by-step contact liquid Liquid mass transfer equipment, each stage includes a mixer and a clarification tank. The main disadvantages of this equipment are: horizontally arranged multi-stage mixing-mixing tanks occupy a large area, each stage is equipped with a stirring device, and the fluid The flow between stages generally needs to be transported by pumps, and the equipment cost and operating cost are relatively large; in the sieve plate tower, the light and heavy phases flow countercurrently in the tower, and the two phases are in cross-flow contact on ...

AI Technical Summary

Problems solved by technology

[0002] Extraction is a way to achieve mass transfer between two liquid phases in the chemical industry. At present, the chemical equipment used in the extraction process in wet phosphoric acid purification is mainly as follows: multi-stage mixing-settling tank, which is a typical step-by-step contact liquid Liquid mass transfer equipment, each stage includes a mixer and a clarification tank. The main disadvantages of this equipment are: horizontally arranged multi-stage mixing-mixing tanks occupy a large area, each stage is equipped with a stirring device, and the fluid The flow between stages generally needs to be transported by pumps, and the equipment cost and operating cost are relatively large; in the sieve plate tower, the light and heavy phases flow countercurrently in the tower, and the two phases are in cross-flow contact on each tray. The mass efficiency is relatively high, but its internal structure is complex, the production cost is high, and internal cleaning is difficult; the packed tower, the packed tower structure is relatively simple, but the efficiency is low, and it cannot be used for materials with solid particles and easy scaling; pulse packing Tower and pulse sieve plate tower, in order to improve the two-phase contact condition and strengthen the mass transfer process, mechanical energy is added to the packed tower and sieve plate tower to cause pulsation, and the generation of pulsation is usually realized by reciprocating pump or compressed air. This type of equipment The mass transfer efficiency is high, but the production cost is high, the internal cleaning is difficult, and the operating cost is high; the vibrating sieve plate tower, the inner sieve plate of the vibrating sieve plate tower is fixed on a central shaft, driven by the crank connecting rod mechanism, the tower is driven by Equipment materials are limited, large-scale is difficult, and operating costs are high

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