氮氧化物尾气吸收塔的方案优化研究

The Study of Optimization of Nitrogen Oxide Tail Absorption Tower

尾气吸收塔用于高放废液玻璃固化过程中的氮氧化物尾气吸收,是整个系统的关键设备之一。本文针对塔内尾气吸收过程的基本单元,利用空气-氨气-水对两种不同规格的孔板开展实验,研究了气液两相通过孔板的传质效率,阐明了开孔直径和液相流量对吸收率的影响规律。结果表明:吸收率随开孔直径的增大而降低;随液相流量的增大而增大。为高放废液玻璃固化尾气吸收塔的方案优化提供了参考。

Tail gas absorption tower is one of the key equipment of the whole system, which is used to absorb nitrogen oxide tail gas in the vitrification process of gas solidification of high-level radioactive liquid waste. Aiming at the basic unit of tail gas absorption process in the tower, this paper carried out experiments on two kinds of orifice plates with different specifications by using air ammonia water, studied the mass transfer efficiency of gas-liquid two-phase passing through the orifice plate, and expounded the influence law of orifice diameter and liquid flow on the absorption rate. The results show that the absorptivity decreases with the increase of orifice diameter and increases with the increase of liquid flow. It provides a reference for the scheme optimization of the high-level radioactive liquid waste vitrified tail gas absorption tower.