Abstract
A column is an important heat and mass transfer equipment, which can be used for distillation, absorption, gas stripping, extraction and other transfer separation process. The commonly used columns include plate columns and packed columns, which are operated under the gravity and have the problems of flooding, furrow flow or bias flow. In this paper, a new column, the swirl tube column, is presented. The swirl tube column is firstly combined super-gravity field (centrifugal force field) with column equipment to enhance mass transfer and absorption process. Through the full-field simulation of a two-stage swirl tube column and experiment, the fluid mechanics performance such as the velocity field and pressure field, pressure drop and flooding critical condition in the swirl tube column, as well as the influence of flowrate and gas-liquid ratio on the absorption performance are studied. Results show that the swirl tube in the column can generate swirling flow, and the flooding problem can be effectively avoided by properly controlling the ratio of liquid to gas, and the absorbing efficiency of the one-staged swirl tube column can reach more than 61%. It is an innovation structural optimization of traditional column equipment. Which has high research and industrial production value.
Highlights
Columns can be used for closing contact between gas-liquid or liquid-liquid phases to achieve the purpose of transfer and separation of components such as distillation, absorption, desorption, extraction drying and so on
The plate column is mainly composed of a cylindrical column body and a plurality of horizontal trays, and the gas-liquid contact mass transfer mainly occurs on the tray plate
The hydrodynamic performance of the swirl tube column mainly refers to the flow state of the gas-liquid two phases in the swirl tube, and various factors affecting the mass transfer and separation performance of the swirl tube, such as the pressure drop, the split ratio and the operating parameters
Summary
Columns can be used for closing contact between gas-liquid or liquid-liquid phases to achieve the purpose of transfer and separation of components such as distillation, absorption, desorption, extraction drying and so on. Compared with the conventional rectification column, the fully thermally coupled rectification column has certain advantages in terms of energy saving and capital cost saving. He mainly considered energy saving and cost saving, and the efficiency of mass separation was not effectively guaranteed. The gas-liquid phase separation process is enhanced to cause the droplets to smash onto the column wall, flow
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