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提出了给水管网二次加氯二级优化模型,第一级是以满足管网余氯覆盖条件下加氯点数最少为优化目标的加氯点选址优化;第二级是引入用水量权重因子的加氯量优化。结合我国南方某县城管网实例对模型进行分析和验证,结果表明,二次加氯可以降低管网加氯量并使余氯均匀分布,与常规加氯方案(2个加氯点)相比,实例中最优二次加氯方案(4个加氯点)的加氯量减少了39.0%,余氯浓度波动标准差最大值由0.76 mg/L降到0.38 mg/L;而且二次加氯点数存在经济取值区间,在该区间内加氯量随着加氯点数的增多而显著降低。
The second-level optimization model of secondary chlorination of water supply network is proposed. The first level is to optimize the chlorination point location with the least chlorination points under the condition of the residual chlorine coverage in the pipeline. The second level is to introduce water weight Chlorine factor optimization. The model was analyzed and verified with an example of pipeline network in a county in southern China. The results showed that secondary chlorine addition can reduce the amount of chlorine in the pipe network and make the residual chlorine evenly distributed. Compared with the conventional chlorine program , The chlorination amount of the optimal secondary chlorination scheme (4 chlorination points) in the example was reduced by 39.0% and the maximum standard deviation of the residual chlorine concentration was reduced from 0.76 mg / L to 0.38 mg / L; and the secondary addition There is an economic value range for the number of chlorine points, in which the amount of chlorine increases significantly as the number of chlorination points increases.