MULTICAGE-TYPE APPARATUS FOR FILTERING BALLAST WATER FOR AUTOMATICALLY CONTROLLING SIMULTANEOUS REVERSE CLEANING AND METHOD FOR SAME

摘要

The present invention relates to an a multi-cage type ballast water filtering apparatus having a function of automatically controlling simultaneous backwashing, and a method of automatically controlling the simultaneous backwashing. The apparatus includes a body, and filtering units connected to each other to form a packaged structure in the body. Each filtering unit includes a filter filtering ballast water, and an automatic washing unit backwashing the filter. The apparatus further includes a first pressure sensor measuring the pressure in space between the body and the filters, and a second pressure sensor installed on each of some of the filtering units to measure the pressure in the filter of the corresponding filtering unit. When a difference between pressures measured by the first and second pressure sensors exceeds a predetermined range, the automatic washing units of all of the filtering units are simultaneously operated.

主权项

1. A multi-cage type ballast water filtering apparatus having a function of automatically controlling simultaneous backwashing, the apparatus comprising:
a body into or from which ballast water is drawn or discharged; and a plurality of filtering units connected to each other to form a packaged structure in the body, wherein each of the filtering units comprises a filter filtering ballast water that flows through the body, and an automatic washing unit backwashing the filter to remove foreign substances adhering to the filter, the apparatus further comprising: a first pressure sensor measuring a pressure in space between the body and the filters; a second pressure sensor installed on each of some of the filtering units, the second pressure sensor measuring a pressure in the filter of the corresponding filtering unit; and a control unit operating the automatic washing units of all of the filtering units when a difference between a pressure value measured by the first pressure sensor and a pressure value measured by the second pressure sensor exceeds a predetermined range.