FIELD: mechanical engineering. SUBSTANCE: drain sleeve is formed by semiconical walls forming tunnel in their turn for steam relative to underlying outlet zone which is formed by chute and outlet chamber for enhancing efficiency of transfer of mass. Discharged steam is directed to liquid drained from drain sleeve and may pass through steam tunnel. EFFECT: enhanced stability of steam and liquid flow due to effective release of entrapped liquid and gas. 40 cl, 7 dwg
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