【简答题】某水力搅拌絮凝反应池,水力停留时间20min,水头损失0.30m,水温20°C。该反应池的平均G值(水的动力粘度计为1.002×10^-3)为( )S^-1
【简答题】阅读理解 Jiujiang Bridge is well-known in Guangdong. It lies between Jiujiang and Heshan. It's the main road to reach Guangzhou. The bridge was built in September, 1985. It was finished about three years ...
【单选题】某水厂絮凝拟采用机械反应池,单池流量Q=10800m 3 /d,水力停留时间20min,分三级搅拌,每级容积相同,搅拌强度采用第一级G=60s -1 ,第二级G=40s -1 ,第三级G=20s -1 ,水温20℃(水温20℃时,水的黏度为1.002×10 -3 Pa·s,取搅拌效率η 1 =0.75,传动效率η 2 =0.8),则该池第二级搅拌机所需电机功率为()。
【单选题】某水力搅拌絮凝反应池,水力停留时间20min,水力损失0.35m,水温20℃。则该反应池的平均温度G值和GT值为(水温20℃时,水的黏度为1.002×10 -3 Pa·S,密度为998.2kg/m)()。