JPS5481443A - Deaerator exhaust petrieving system - Google Patents

Abstract

PURPOSE:To effectively utilize energy having been held in exhaust in a deaerator by retrieving steam and heat in the exhaust in such a way that the exhaust in the deaerator actuates a gland steam condenser. CONSTITUTION:If the internal pressure of a dearating chamber 401, for example, is made to be driven at 10 atmospheric pressure, working vapor pressure of a gland steam efector 703 is set to be able to work at lower pressure than the internal pressure of the deaerating chamber, such as 7 atmospheric pressure. Then, in case where the internal pressure of the deaerating chamber stands at less than 7 atmospheric pressure, exhaust in the deaerating chamber 401 sent from the deaerating chamber 401 into an exhaust retrieving pipeline 802 is retrieved through a regulating valve 803 into a condenser 200, in the meantime, the working steam of the gland steam ejector 703 is safely driven with a regulating valve 805 made to be open by a starting steam pipe 806. When the internal pressure of the deaerating chamber 401 has risen at more than 7 atmospheric pressure, signals from a pressure detector 807 closes the regulating valves 803, 805, and opens a regulating valve 801, while exhaust in the deaerating chamber 401 is being worked as working steam, to be able to be retrieved with use of a gland steam condensor 700.