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Patent Searching and Data


Title:
CLEANING SYSTEM FOR SAND FILTRATION LAYER
Document Type and Number:
WIPO Patent Application WO/2014/091828
Kind Code:
A1
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.

Inventors:
INUI MASAKI (JP)
NIIZATO HIDEYUKI (JP)
INOUE TAKAYUKI (JP)
YANAGIMOTO YOUICHI (JP)
OIWA TADAO (JP)
MIMURA HITOSHI (JP)
Application Number:
PCT/JP2013/078977
Publication Date:
June 19, 2014
Filing Date:
October 25, 2013
Export Citation:
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Assignee:
HITACHI SHIPBUILDING ENG CO (JP)
NAGAOKA KK (JP)
International Classes:
B01D24/46; B01D29/66; E03B3/04
Foreign References:
JP2012246711A2012-12-13
JPS58137409U1983-09-16
JPS5159966U1976-05-12
JPH07289813A1995-11-07
JP2000186351A2000-07-04
JPS5845708A1983-03-17
JP2013075268A2013-04-25
JP2013181371A2013-09-12
Attorney, Agent or Firm:
MIZOGAMI, Tetsuya et al. (JP)
Tetsuya Mizogami (JP)
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