Apparatus and method for purifying a liquid

摘要

For purifying a liquid, the liquid is caused to evaporate in a cyclone in a recirculation circuit. Vapor is discharged via a discharge channel in which a compressor is included. In a heat exchanger downstream of the compressor, supplied vapor condenses and heat thereby released is transferred to liquid in the recirculation circuit. A liquid inlet of the cyclone is placed and directed for delivering a jet having a directional component tangential with respect to an inner surface of the cyclone. The liquid inlet has a section shaped such that in operation the delivered jet is a flat jet having a cross section which in a direction parallel to a nearest generatrix of the inner surface of the cyclone is greater than in a direction perpendicular thereto. The jet contacts the inner surface of the cyclone before drop formation occurs in the jet. A method for purifying a liquid is also described.

主权项

1. A method for purifying a liquid, comprising:
in a recirculation circuit recirculating the liquid through a cyclone, wherein the liquid flows over an inner surface of a circumferential wall of the cyclone, a portion of the liquid evaporates and is discharged via a vapor outlet which extends through an upper wall of the cyclone and another portion of the liquid is discharged through a liquid outlet in a lower end of the cyclone; compressing the discharged evaporated portion of the liquid; causing a portion of the discharged evaporated portion of the liquid to condense; and causing heat released in the condensing of the portion of the discharged evaporated portion of the liquid to be transferred to the liquid which is recirculated in the recirculation circuit; wherein the liquid is introduced from a liquid inlet into the cyclone in form of a liquid jet having a directional component tangential with respect to a portion of the inner surface of the circumferential wall of the cyclone that is situated closest to the liquid inlet; wherein the liquid jet is a flat jet with a cross section which in a direction parallel to a nearest generatrix of the inner surface of the circumferential wall of the cyclone has a greater dimension than in a direction perpendicular thereto; wherein speed, location, orientation and shape of the liquid jet are such that it contacts the inner surface of the circumferential wall of the cyclone without drop formation occurring in the jet; wherein temperature of the liquid in the liquid jet and pressure in cyclone are such that in the liquid no boiling occurs; and wherein the liquid flows in a helical line over the inner surface of the circumferential wall of the cyclone.