BALLAST WATER TREATMENT DEVICE
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United States of America Patent
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Issued Date -
Jun 1, 2017
app pub date -
Nov 15, 2016
filing date -
Dec 1, 2015
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Abstract
Provided is a ballast water treatment device with which filter clogging can be effectively eliminated by backwash using a simple configuration. The ballast water treatment device is provided with: a filter 52; an introduction line L1; a line L11through which the ballast water W2 filtered by the filter 52 flows; a flow rate adjustment unit (valve V12) for adjusting the flow rate of the ballast water W2 that flows through the line L11; and a flow rate control unit (control unit 9) for controlling the flow rate adjustment unit V12. The flow rate control unit 9, in a situation where the filtering capability of the filter 52 is decreased, controls the flow rate adjustment unit V12 so as to increase the pressure on a secondary side of the filter 52 by decreasing the flow rate of the ballast water W2, and the filter 52 is then subjected to backwash with the pressure on the secondary side of the filter 52 having been increased.
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