Title:
A slowdown washing filter and a method for filtering the same
Document Type and Number:
Japanese Patent JP6185382
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a natural equilibrium type filtration apparatus comprising a slowdown washing mechanism that can complete a construction only for a drain sewer to complete the construction at a low cost in a short period of time.SOLUTION: A natural equilibrium type filtration apparatus of this invention comprises a filter basin 2 where a filter medium layer 40 is arranged, a filtration drain sewer 3 into which filtrate water having passed through the filter medium layer 40 flows, a drain sewer 4 connected to the filter basin 2 with a drain siphon 50, and a discharge valve or discharge gate 41 arranged in the drain sewer 4 to discharge the drain water in the drain sewer 4. The natural equilibrium type filtration apparatus of this invention further has a control part 15 that previously determines an opening of the discharge valve or discharge gate 41 which is at a flow speed at which a filter medium constituting the filter medium layer 40 does not get fluidized during backflow washing for flowing filtrate water back into the filter medium layer 40 and makes the opening control of the discharge valve or discharge gate 41 on the basis of the predetermined opening.
Inventors:
Chiba Mamoru
Koji Kashimada
Tomoko Sanma
Koji Kashimada
Tomoko Sanma
Application Number:
JP2013261236A
Publication Date:
August 23, 2017
Filing Date:
December 18, 2013
Export Citation:
Assignee:
Watering Co., Ltd.
International Classes:
B01D24/46; B01D24/02
Domestic Patent References:
| JP2012045459A | ||||
| JP3169308A | ||||
| JP1262907A | ||||
| JP3026308U | ||||
| JP2006088031A | ||||
| JP2001252506A | ||||
| JP11226311A | ||||
| JP3038205A |
Attorney, Agent or Firm:
Isamu Watanabe
Tetsuya Hirosawa
Tetsuya Hirosawa
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