| 摘要 |
PURPOSE:To prevent the increasing of a tube wall surface temperature and liquefaction of handling gas by a method wherein intermediate gas cooled by an intermediate heat exchanger is heated up to such a temperature as one not liquefied even under an expansion at a labyrinth part and supplied to a compressor at a high pressure. CONSTITUTION:CO2 gas compressed by a compressor 1 is supplied by an intermediate heat exchanger 3, a part of this gas is mixed with gas bypassed through the intermediate heat exchanger 3 and cooled by it, adjusted to show a certain specified temperature and further sent to a high pressure side compressor 2. An amount of cooling water and an amount of bypassed gas are adjusted by a temperature controller 5 and a temperature controller 7 in such a way as a temperature of the cooling gas becomes a certain temperature. The temperature controller 5 sets CO2 temperature to a minimum temperature not generating any liquefaction and the temperature controller 7 sets its temperature to a minimum temperature not generating any liquefaction even if CO2 gas is expanded. With such an arrangement, it is possible to prevent any occurrence of stress corrosive cracking of the heat exchanger tube and further to extend a life of the tube.
|
