独居石酸浸尾气两级串联吸收塔气液两相流的数值模拟研究

利用Fluent软件对独居石酸浸氯化氢尾气两级串联吸收塔的气液两相流进行了模拟计算。在总风量为2 169 m³/h,其中氯化氢气体量109 m³/h的工况下考察了吸收塔内气液两相流的速度、压力及氯化氢气体浓度分布。模拟结果表明,两级填料塔串联吸收后氯化氢尾气的浓度为37 mg/m³,满足排放要求,验证了设计的两级串联吸收塔吸收氯化氢尾气方案的可行性。

Numerical Simulation of Gas-liquid Two-phase Flows in Two Stage Series Absorption Tower of Tail Gas Produced from the Process of Acid Leaching Monazite

The gas-liquid two-phase flows in two hydrogen chloride absorption columns which are connected in series are simulated by using Fluent software. Under the condition of the ventilation quantity of the tail gas being 2 169 m³/h and 109 m³/h of which is hydrogen chloride, the gas-liquid flow rate, pressure and hydrogen chloride distribution in the adsorption columns are investigated. The simulation results show that after the hydrogen chloride is adsorbed by two stage series adsorption columns, the concentration of it is 37 mg/m³, which meets the pollutant release standard and indicates that the scheme of that the hydrogen chloride is adsorbed by the two stage series adsorption columns is feasible.