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本文简述国内外关于沉淀模拟的基本理论,并探讨了周边进水式沉淀池处理城市污水的沉淀模拟方法。研究得出:城市污水中所含的凝聚性悬浮质点,在沉淀中的凝聚沉淀过程是以梯度凝聚为主,对于梯度凝聚沉淀过程的模拟,除按等速流原则违模和水质条件相似外,还必须使流入沉淀池的进水SS浓度和沉淀池尺寸的平方根成反比,即要实现公武C_o模/C_o原=(l_o原/l_o模)~(1/2)根据这一指导思想,进行了实验性质的模型对比试验和现场测定,通过对模型中水流流态的观察、对比测定模型与假想原型的水力特性参数和沉淀效率,验证了以上公式有足够的正确性和实用价值。
This article briefly describes the basic theory of sedimentation simulation at home and abroad, and discusses the sedimentation simulation method for the treatment of urban sewage in the surrounding influent sedimentation tank. The study concludes that the cohesive suspended particles contained in the municipal sewage, the cohesion and sedimentation process in the sedimentation is dominated by gradient condensation, and the simulation of the gradient condensation precipitation process is similar except that the mold and water quality conditions are similar according to the principle of constant velocity flow. It is also necessary to make the influent SS concentration flowing into the sedimentation tank inversely proportional to the square root of the sedimentation tank size, ie to achieve the Gongwu C_o model/C_o original = (l_o original/l_o model) ~(1/2) according to this guiding ideology, Experimental comparative experiments and on-site measurements were carried out. The accuracy and practical value of the above formula were verified by observing the flow patterns of the water in the model and comparing the hydraulic characteristics of the model with the hypothetical prototype.