Gas-liquid mass transfer device

Abstract

Belonging to the field of gas-liquid mass transfer devices, the invention discloses a gas-liquid mass transfer device. The device comprises: a tower body, two or more mass transfer unit groups, an independent liquid collector and an independent liquid receiving disc. The top of the tower body is provided with a gas outlet and a liquid inlet, and the bottom is provided with a liquid outlet and a gas inlet. The independent liquid collector and the independent liquid receiving disc are positioned at the bottom of the tower body. Each mass transfer unit group consists of a liquid collector, a liquid receiving disc, a liquid distributor and a mass transfer area from top to bottom, and the mass transfer unit groups are in up-down arrangement inside the tower body. The bottom of each liquid receiving disc is provided with small holes. When the device operates, the gas-liquid two-phase flow direction shows overall counter-flow and local co-current flow, that is to say, a gas flows into the tower body from the bottom and flows out from the top, while a liquid flows into the tower body from the top and flows out from the bottom. And in each mass transfer area, the gas and the liquid are in top-down co-current contact for mass transfer. The special flow state combines respective advantages of counter-flow and co-current flow, a large mass transfer driving force and complete and stable gas-liquid contact can be realized simultaneously, the mass transfer rate can be improved, and the mass transfer effect can be ensured.

Description

Technical field [0001] The invention relates to a gas-liquid mass transfer device, in particular to a gas-liquid mass transfer device including distillation and absorption (or desorption) mass transfer processes, belonging to the field of gas-liquid mass transfer devices. Background technique [0002] The separation of homogeneous mixtures is an important process in the chemical industry. The basis of separation is based on the difference in physical properties of different components in the system, so that certain components or certain components are transferred from one phase to another. To achieve the purpose of separation. Distillation and absorption (or desorption) are typical chemical unit operations that achieve separation. Although the two are separation processes based on different principles, that is, the distillation operation is based on the difference in the volatility of the substance, and the absorption (or desorption) operation is based on the difference in the s...

AI Technical Summary

Problems solved by technology

However, due to the inherent defects of counter-current and parallel-current operations, the further improvement of the performance of tower equipment is subject to insurmountable restrictions.

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