涡旋混凝低脉动沉淀技术在海港水厂的应用

依据惯性效应理论对海港水厂斜管池、平流池的混合反应沉淀工艺进行常规技术强化改造。结果表明 ,斜管池改造后 ,反应时间由 2 5min缩短为 8 5min ,沉淀池负荷达 3 5mm/s以上。净产水量达到 10 0万m3 /d ,较原设计 (5 0万m3 /d)提高 10 0 % ,较原实际运行水量 (3 0万m3 /d)提高 2 30 % ,同时沉淀池出水控制在 3NTU以下。平流池改造后 ,反应时间由 35min缩短为 12 5min ,净产水量达到 5 5万m3 /d ,较原设计水量 (3 5万m3 /d)提高 5 7 1% ,同时沉淀池出水控制在 3NTU以下 ;改造后混凝剂单耗较改造前降低 30 %。实践表明 ,微涡旋的离心惯性效应是絮凝的动力学致因 ,以此为依据的涡旋混凝低脉动沉淀技术有效地改善了常规给水处理工艺的絮凝沉淀动力环境 ,并具有效率高、水质好、成本低的特点。

Optimal operation of cascaded hydroelectric power plants in the power market

An improved network flow algorithm, which includes the minimum cost network flow and the same period network flow, is proposed to solve the optimization of cascaded hydroelectric power plants in a competitive electricity market. The typical network flow is used to find the feasible flow and add the discharge water to different cascaded hydroelectric power plants at the same step. The same period network flow is used to find the optimal flow and add the power output at a different step. This new algorithm retains the advantages of the typical network flow, such as simplicity and ease of realization. The result of the case analysis indicates that the new algorithm can achieve high calculation precision and can be used to calculate the optimal operation of cascaded hydroelectric power plants.