DEAERATING METHOD AND CONDENSER

PURPOSE:To permit deaeration without using steam and reduce the cost of installation by a method wherein condensed water is heated by an electric heating device upon starting a plant and the like to contrive deaeration. CONSTITUTION:Upon starting a plant, a circulating water pump is started at first and subsequently a condensed water pump 6 is started to recirculate condensed water 13 in a condenser 1 into the condenser 1 through a feed water system 5, a condensed water recirculating system 7 and a spray tube 8. Then, the condensed water 13, dropped on the ceiling plate 9 of the condenser 1, is passed through a hot well, employed as a passage by a hot well partitioning plate 10, to recirculate it. An air extracting device 3 is operated under this condition whereby air in the condenser 1 is extracted to deaerate the condensed water. The condensed water 13, reserved in the hot well of the condenser is heated by an electric heating device 14 attached to the bottom plate of the condenser 1 whereby the temperature of the condensed water is increased and deaeration is promoted. According to this method, prominent deaeration effect can be expected through an inexpensive installation.