PROBLEM TO BE SOLVED: To provide a filter device which has a cleaning effect capable of being stably used for a long period while preventing breakage due to usage thereof, and to provide a ballast water treatment apparatus using the filter device.SOLUTION: A filter device is manufactured by using a pleat filter in which filter base material having folds so as to repeat mountain parts and valley parts are formed into such a cylindrical shape that the ridge line direction of the folds are set as the axial direction, as a filter membrane. Therein, the pleat filter can be rotated around a cylinder shaft of the cylindrical shape as the center, a nozzle which is disposed opposite to the outer circumferential surface of the pleat filter and ejects liquid toward the outer circumferential surface is provided and, when the pleat interval on the outer circumference side folds is p, the length of the ridge line direction effective for filtration is h, the opening width vertical to the ridge line direction on the opening part of the nozzle is W and the length of an opening in the ridge line direction is L, the following relations are satisfied: 4p≤W, and h/5≤L≤h/2.
【課題】使用による破損を防止しつつ、長期間安定して使用することが可能な洗浄効果を備えた濾過装置、およびそれを用いたバラスト水処理装置を提供する。【解決手段】山部と谷部を繰り返すように折り目を有するフィルター基材を前記折り目の稜線方向を軸方向とする円筒形状としたプリーツフィルターを濾過膜とする濾過装置であって、前記プリーツフィルターは前記円筒形状の円筒軸を中心に回転可能であり、前記プリーツフィルターの外周面に対向して設けられ、前記外周面に向けて液体を噴出するノズルを備え、前記プリーツフィルターの外周側折り目におけるプリーツ間隔をp、濾過に有効な前記稜線方向の長さをhとし、前記ノズルの開口部における前記稜線方向に垂直な開口幅をW、前記稜線方向の開口長さをLとしたとき、4p≰Wであり、かつh/5≰L≰h/2の関係を満たす濾過装置とした。【選択図】 図11
FILTER DEVICE, BALLAST WATER TREATMENT APPARATUS USING THE SAME AND TREATMENT METHOD OF BALLAST WATER
濾過装置、それを用いたバラスト水処理装置およびバラスト水の処理方法
2015-07-06
Patent
Electronic Resource
Japanese
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