METHOD AND APPARATUS FOR COLLECTING SURFACE LAYER OF LIQUID

摘要

A method for collecting a surface layer of a liquid into confined area, method including forming confined area by means of wall structure and moving some of surface layer of liquid into confined area by means of a flow of air directed into confined area through an opening made into wall structure of confined area so that amount of substance in surface layer of the liquid increases in confined area in comparison with surroundings. The bottom edge of opening made into wall structure of confined area is arranged to be below surface level of liquid outside confined area whereas its top edge is substantially above surface level of liquid outside confined area. The surface level of liquid inside confined area is arranged to be kept substantially on same level with surface level of liquid outside by providing a continuous liquid flow connection through lower portion of confined area into surroundings.

主权项

1. A method and apparatus for collecting a surface layer of a liquid into a confined area, the method comprising forming the confined area by means of a wall structure and moving some of the surface layer of the liquid into the confined area by means of a flow of air directed into the confined area through an opening made into the wall structure of the confined area so that the amount of substance in the surface layer of the liquid increases in the confined area in comparison with the surroundings, the opening formed to the wall structure of the confined area having its bottom edge below the surface level of the liquid outside the confined area and its top edge substantially above the surface level of the liquid outside the confined area and that the surface level of the liquid in the confined area is maintained substantially on a same level with the surface level of the liquid outside by providing a continuous liquid flow connection through the bottom part of the confined area into the surroundings, wherein re-circulating partly or totally the flow of air directed into the confined area through the opening into the confined area.