Multicage-type device for filtering ballast water for automatically controlling sequential backwashing and method for same

Abstract

The present invention relates to a device for filtering for treating ballast water by means of a filtering method, and to a method for controlling same, and more particularly, to a multicage-type device for filtering ballast water which automatically controls sequential backwashing and a method for same. In the multicage-type device for filtering ballast water, an automatic cleaning portion in each filtering device, in which differential pressure of at least a specific range with respect to pressure inside a body is generated, from a plurality of filtering units in the device for filtering, is sequentially actuated under the control of a control portion, thereby allowing smooth backwashing by preventing increase of back pressure during backwashing of foreign substances, and increasing repair / maintenance efficiency by installing a second pressure sensor for measuring pressure inside a filter in each of the filtering units via a pressure measurement aperture that penetrates an upper portion cover plate that covers a filter inlet aperture on an upper portion of the body.

Description

technical field [0001] The present invention relates to a filter device and its control method for treating ballast water in a filtering manner, in particular to a multi-cage ballast water filter device and its control method for automatic control of sequential backwashing. Under the control of the control part, the water-carrying filter device drives the automatic cleaning part sequentially for the filter units whose pressure and the internal pressure of the body have a differential pressure above a certain range among the multiple filter units of the filter device, so as to prevent the back pressure from increasing during the foreign matter backwashing process. Backwashing can be carried out smoothly; the efficiency of maintenance is improved by installing the second pressure sensor to measure the pressure inside the filter of each filter unit through the pressure measuring hole of the upper cover plate, which covers the filter on the upper part of the body Introduce the hol...

AI Technical Summary

Problems solved by technology

[0011] Moreover, in the process of backwashing each filter unit of the existing filter device, the components used in the backwash device will collide with each other and be damaged or be damaged by accumulated foreign matter. The means that can fundamentally solve this problem are insufficient. The device also does not have a technical structure that can solve the problem caused by the ballast water placed inside the filter device when it is out of service, or the problem related to the air tightness of the filter that prevents the flow of unfiltered ballast water

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