Backwashing device moving type filtration device, backwashing device, backwashing method

摘要

PROBLEM TO BE SOLVED: To dispense with a building for covering the whole filtration pond, in a backflow washing device movable type filtration device having a filtration pond.SOLUTION: A backflow washing device movable type filtration device includes a filtration pond for executing backflow washing processing with respective filtration sections by a backflow washing device for moving between the respective filtration sections by partitioning a filter material layer into a plurality of filtration sections in the longitudinal direction of a filtration pond by a partition plate and a clean water conduit for storing clean water provided by the filtration pond, and in the backflow washing device movable type filtration device, a raw water conduit and the filtration pond are partitioned by a first partition wall, and the first partition wall is provided with a raw water inflow hole, and a clean water chamber for flowing out the clean water provided by filtration-processing, is provided under the filter material layer, and the filtration pond and the clean water conduit are partitioned by a second partition wall, and a lower part of the second partition wall is provided with a clean water catchment pipe for connecting the clean water chamber and the clean water conduit, and an upper part of the second partition wall is provided with a backflow washing pump arranged in the clean water conduit in backflow washing time and a pipe moving opening for moving a surface wash water supply pipe along the longitudinal direction of the filtration pond.SELECTED DRAWING: Figure 3