| 摘要 |
PURPOSE:To perform the self-feeding of carbon dioxide used in preparing potable water, by providing a gas extraction apparatus and a dissolving and absorbing apparatus to the confluent pipe communicated with the gas extraction pipe connected to each condenser in the high temp. stage side of an evaporation type seawater desalting apparatus so as to successively arrange both apparatuses on the downstream side. CONSTITUTION:Evaporators 4 each equipped with a flash box 1, a demister 2 and a condenser 3 are connected in a multi-stage fashion and seawater is introduced into the condenser 3 of each evaporator 4 from one end side thereof and withdrawn from the other end side thereof and, after heated by a main heater, evaporated while sent to the flash box 1 of each evaporator 4 in the other end side thereof. Gas extraction pipings 5 are respectively arranged to the steam sides of the condensers 3 of plural evaporators 4 in the high temp. stage side H being the other end side thereof and met to form a confluent pipe 6 while the ejector 8 connected to a water supply pipe 7 is provided to said confluent pipe 6 and a pipeline 9 is connected to a dissolving tank 10 where carbon dioxide is dissolved and absorbed from non-condensible gas containing carbon dioxide.
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