PURPOSE: To provide a deaeration method for removing selectively only a dissolved gas of such a type as not required from a liquid containing a few different types of dissolved gas at low initial and running costs and under a simple constitution as well as a device using this method.
CONSTITUTION: A liquid to be treated is allowed to pass through one side of a gas permeable membrane, while another type of gas than the type to be removed is allowed to pass through the other side of the membrane. Thus a dissolved gas is removed as a selective deaeration method. As a selective deaeration device embodying this method, a a feeder line 12 of a liquid to be treated is connected to one end of a deaeration module 10 equipped with a gas permeable membrane 11, and a discharge line 13 is connected to the other end. Further, one side of the gas permeable membrane 11 is a liquid phase side for the introduction of a liquid to be treated, and the other side is a gas phase side for the introduction of a gas. A gas feeder line 14 for feeding a gas of any other type than the type to be removed is connected to the gas phase side of the gas permeable membrane 11.
YAMASHITA MASAZUMI
KUBOI JUN
