EVAPORATOR FOR PURIFYING BLEED WATER IN STEAM-GENERATION INSTALLATION AT NUCLEAR POWER STATION Russian patent published in 1997 - IPC

FIELD: nuclear-power engineering. SUBSTANCE: invention makes it possible to perform thermal purification of salt-containing liquid superheated in relation to pressure of medium in steam space of apparatus and to provide required parameters of secondary steam under all allowed pressures within wide loading range. Inside casing of evaporator, on its upper bottom, separator and secondary steam-collection and steam-offtake chamber are placed and, under them, in steam space, connection pipes to supply bleed water are disposed. In lower part of steam space, bleed water-collection chamber is placed and, below it, water-distribution chamber is coaxially mounted. Water space of apparatus casing includes heating unit in the form of bundle of vertical pipes enclosed in cylindrical shell. Over heating unit, immersed perforated sheet in the form of truncated cone or truncated polyhedral pyramid is disposed which has central plane, peripheral inclined part, and raised edge. Evaporated solution- collection and discharge chamber is placed in lower part of water space of casing. EFFECT: enhanced efficiency of process. 3 cl, 2 dwg