| 摘要 |
PURPOSE: A degassing system is provided which removes dissolved gases of industrial and power plant boilers and water circulation systems so as to prevent corrosion of metal, thereby improving performance of facility. CONSTITUTION: In a degassing system which removes through a vent the noncondensed gas from which dissolved gas is separated in the supplied water by heating supplied water supplied into a degassing vessel(70) through a water supplying piping(61) using steam and mixing the heated supplied water with high pressure steam, thereby lowering partial pressure of a noncondensed gas in the water, the degassing system comprises a heat recovery water tank(90) into which the dissolved gas and steam are supplied through a supply pipe connected to the vent; a vent pipe(93) one end of which is exposed to the outer part of the heat recovery water tank, the other end of which is received inside the heat recovery water tank, and on the outer circumferential surface of which a vent hole(92) are formed at arbitrary positions inside the heat recovery water tank; a discharge pipe(94) which has a smaller diameter than the vent pipe(93), one end part of which is connected to the vent tube with spaced apart from the inner circumferential surface of the vent pipe in a certain distance, one end of which is positioned at a position lower than the vent hole(92), and other end of which is exposed to the outer side of the heat recovery water tank; and a built-in water supply pipe(91) which is connected to the water supplying piping(62) by passing through the heat recovery water tank in a certain pattern, wherein supplied water supplied to the degassing vessel is supplied through the built-in water supply pipe inside the heat recovery water tank, and the dissolved gas inside the heat recovery water tank is exhausted through the vent hole.
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