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近年来,移动罩滤池等新型过滤装置的相继出现,标志着我国过滤技术取得了进一步的发展。实践表明,这些装置具有不少优点,但也存在着不少问题。为了切实解决这些问题,首先应对其净水机理、水力特性等进行分析,以便为进一步探讨解决这些问题提供理论依据。本文仅就其中几个主要的,带共性的问题从理论上作一点分析,以期和大家共同讨论。一、气阻移动罩滤池为恒水头变滤速滤池,水流在滤层孔隙中的运动属非稳定流动。但是,随着过滤过程的延续,滤层截污量将逐渐增
In recent years, the emergence of new filtration devices such as mobile hood filters has marked the further development of filtration technology in China. Practice shows that these devices have many advantages, but there are also many problems. In order to effectively solve these problems, we must first analyze its water purification mechanism, hydraulic properties, etc., in order to provide a theoretical basis for further discussion and solution to these problems. This article only analyzes some of the major issues that share commonalities in theory, in order to discuss them with everyone. 1. The air-resistance moving hood filter is a constant-head variable-speed filter, and the movement of the water in the pores of the filter is unsteady. However, with the continuation of the filtration process, the amount of filter interception will gradually increase