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旧设计数据存在的问题过去,天然锰砂滤池的管式大阻力排水系统的设计是依据快滤池管式大阻力排水系统的设计数据进行计算的(《给水排水设计手册》第5册)。设计前,首先要确定滤池的反冲洗强度,以此值进行计算。快滤池的反冲洗强度为12～15升/米~2·秒,天然锰砂滤池的反冲洗强度为14～30升/米~2·秒(大多数天然锰砂除铁水厂采用的反冲洗强度为17～24升/米~2·秒),远远大于快滤池的反冲洗
Problems in the old design data In the past, the design of a pipe-type large-resistance drainage system for a natural manganese sand filter was based on the design data of a fast filter pipe-type large-resistance drainage system (Water Supply and Drainage Design Manual, Volume 5). . Before designing, we must first determine the backwash intensity of the filter tank, and calculate this value. The backwash intensity of the fast filter tank is 12 to 15 liters/meter~2 seconds, and the backwash strength of the natural manganese sand filter is 14 to 30 liters/meter~2 seconds (most natural manganese sands are used in addition to the molten iron plant. The backwash intensity is 17 to 24 liters/meter~2 seconds, which is far greater than the backwash of the fast filter tank.