DEAERATION-DISTILLATION HEAT-EXCHANGER Russian patent published in 2001 - IPC

FIELD: heat engineering. SUBSTANCE: deaeration-distillation heat-exchanger has housing with annular space defined by two coaxially arranged tubes and incorporating evaporate cooler, deaerated water cooler and steam-and-water heater, which are successively positioned from bottom to top. Mentioned parts of heat-exchanger are made in the form of tubes which are arranged in annular space and are in fluid communication one with another via transition chambers. Incorporated in heat-exchanger cavity and arranged from top to bottom are: deaeration expansion chamber, primary steam condensate expander and evaporate separator, which are separated one from another by partition walls. Deaeration expansion chamber having common wall with steam-and-water heater is communicated via basic water through windows: from top with steam-and-water heater and from bottom with deaerated water cooler. Lower part of steam-and-water heater is communicated via condensate pipeline with primary steam condensate expander, which is equipped with branch pipe for discharging condensate and branch pipe for discharging secondary steam to bubbler arranged in lower part of deaeration chamber. Evaporate and noncondensed gas discharge device is made in the form of annular chute provided with baffle-type separator and facing inward to bubbler, and discharge branch pipes, whose lower ends are positioned in evaporate separator communicated to evaporate cooler via windows formed in common wall. Heat-exchanger is further provided with branch pipes for supplying and discharge of water and steam. Heat-exchanger of such construction may be used in heat electric power stations, boiler rooms etc. EFFECT: reduced metal usage per unit of deaerated water and condensate, improved quality of deaeration through the usage of secondary bubbling steam. 4 cl, 6 dwg