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为了预测紫外反应器的消毒效率,提高模拟的准确度,对两种紫外光强模型进行了比较分析。利用CFD技术,采用数值模拟的方法,对线源和柱源两种光强模型进行了光强分布以及消毒效率的模拟,并采用生物实验进行了验证。结果表明:与柱源模型相比,线源模型在近灯管处强度高42.3%,在1.2 cm处二者趋于一致;针对同一管式紫外反应器,透光率为95%时,线源模型的模拟结果偏大,柱源结果偏小;透光率为80%时,线源及柱源模型的模拟结果都偏大,流量及模型影响较小,透光率成为主要影响因素。综合比较,柱源模型适用于小型管式紫外灯消毒数值模型的开发。
In order to predict the disinfection efficiency of UV reactor and improve the simulation accuracy, two kinds of UV intensity models were compared and analyzed. The CFD technique and the numerical simulation method were used to simulate the light intensity distribution and disinfection efficiency of the two light intensity models of the source and the column source, and the biological experiment was used to verify the model. The results show that compared with the column source model, the line source model has a high intensity of 42.3% near the lamp and the same at 1.2 cm. For the same tubular UV reactor, when the light transmittance is 95% The simulation results of the source model are larger and the results of the column source are smaller. When the light transmittance is 80%, the simulation results of the source and column source models are too large, the influence of the flow and the model is small, and the transmittance is the main factor. Comprehensive comparison, column source model for small tube UV lamp disinfection numerical model development.