Floatation arrangement

Claim 1

An arrangement for floatation of solid particles from liquids such as from sewage, particularly for separating of coal from a conditioned pulp, the arrangement comprising conditioning means from which a pulp flows in a predetermined direction; a pulp supplying conduit extending from said conditioning means; gasifying means having a gasifying surface extending parallel to the pulp flow direction and provided with a bubble generator; a gas supplying conduit; and separating means having substantially upright conical container for foam formation and a level controlling element, arranged laterally of said separator means for adjusting the level of the pulp in said separating means said gasifying means including a plurality of gasifying devices arranged in a ring-shaped manner around said conical container and each connected with said pulp supplying and gas supplying conduits so that when the pulp is supplied from said conditioning means via said pulp supplying conduit and said gas is supplied via said gas supplying conduit into each of said gasifying devices solid particles of the pulp adhere to gas bubbles produced in said gasifying devices and thus-formed gas bubbles-solid particles complexes are supplied into said separating means, said bubble generator of each of said gasifying devices is formed of at least one pipe composed of an elastic and porous synthetic plastic material, extending transversely to the flow direction of the pulp.