紫外光降解反应器去除氯苯气体模型的建立与应用

Establishment and Application of Gaseous Chlorobenzene UV-Photodegradation Model

从光化学反应过程出发,基于线性光源球面辐射能量分布(LSSE),以反应器内部空间的辐射能吸收密度、空塔停留时间、进口浓度等为主要参数,建立了气相环境中紫外光化学反应器去除氯苯的数学模型.结果表明,建立的模型能很好地模拟和预测紫外光化学反应器对氯苯气体的去除性能.氯苯气体的紫外光化学反应表现出一级反应动力学的特征.该模型包含了紫外光降解反应器设计的主要参数,同时被用于预测了反应器在不同进口浓度和不同空塔停留时间条件下的出口氯苯浓度,进而获得不同进口浓度达标排放所需要的最小空塔停留时间,为气相污染物的紫外光降解反应器的设计与运行提供了重要的理论指导.

This work was attempted to provide a model to describe the performance of an UV photochemical reactor to remove gaseous chlorobenzene. Based on photochemical process and linear source sphere emission（LSSE） irradiation energy distribution, the model established in this study indicated that the performance of the reactor was dependent on the local volumetric rate of energy absorption （LVREA） inside reactor, the empty bed residence time and the inlet concentration. Moreover, the model was used to predict the outlet concentrations under the operating conditions of various inlet chlorobenzene concentrations and empty bed residence time. Finally, the model shows theory significance for the engineering design and operation of the UV photochemical reactor.