RECTIFYING COLUMN STRIPPING UNIT Russian patent published in 2002 - IPC

FIELD: heat-and-mass exchange technique; construction of rectifying columns; rectifying columns of chemical and petrochemical industries. SUBSTANCE: stripping unit includes hot-water boiler, circulating line and still bottoms discharge line; connected to still bottoms discharge line is counter-flow film evaporator whose upper chamber is connected with inlet admitting vapors to rectifying column. Film evaporator ensures stripping of low-boiling components from bottoms liquid. Return of vapors to column ensures redistribution of concentrations towards reduced boiling point, thus increasing productivity. EFFECT: increased productivity. 1 dwg