Cleaning system for sand filtration layer

Abstract

[Problem] To provide a more compact cleaning apparatus for a sand filtration layer, and reduce the scale of operations and the running costs. [Solution] The cleaning system (1) is designed for use in a seawater permeation intake apparatus (5) for intake of seawater having permeated through a sand filtration layer (2) and a supporting gravel layer (3) on the seabed through intake pipes (4) buried in the supporting gravel layer (3), in order to remove from the sand filtration layer (2) suspended matter that could cause clogging. The system is provided with: diffuser tubes (7) buried in the sand filtration layer (2) and having air holes (6); and a compressed air delivery means (8) for feeding air into the diffuser tubes (7). The filtration sand of the sand filtration layer (2) is agitated by jetting air from the air holes (6), removing suspended matter that has become admixed or deposited in the sand filtration layer (2). [Effect] As compared with conventional systems that inject water or seawater into a sand filtration layer, the cleaning equipment can be more compact, and the scale of operations and running costs can be reduced.

Description

technical field [0001] The present invention relates to a cleaning system for a filter sand layer, which removes suspended substances that cause mesh clogging from the filter sand layer of a seawater infiltration water intake facility installed on the seabed. Background technique [0002] For example, in a seawater desalination plant, in order to obtain clean seawater with less impurities, a supporting gravel layer and a filter sand layer are installed on the seabed, and the seawater infiltrating into these layers is taken from the seawater infiltrating through the water intake pipe buried in the supporting gravel layer. Water intake equipment (for example, the patent document 1 figure 1 ). [0003] If the osmosis water intake method implemented using this seawater osmosis water intake device continues to draw water, suspended substances such as sediment and plankton (hereinafter simply referred to as "suspended substances") that cause the mesh clogging of the filter sand l...

AI Technical Summary

Problems solved by technology

Therefore, the cleaning equipment is enlarged, the project scale is enlarged, and the operating cost is also increased.

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