| 摘要 |
In a CO2 collecting system with the use of an absorbing liquid, by focusing on heat that has a small temperature difference and is difficult to be effectively utilized, effective use of the heat of the CO2 collecting system with the use of the absorbing liquid is attained. By focusing on the quantity of heat in which the temperature of a lean liquid obtained after heat exchange between an absorbing liquid (lean liquid), from which CO2 is desorbed, and an absorbing liquid (rich liquid), in which CO2 is absorbed, is reduced up to the temperature at which CO2 is absorbed, water from a condenser is used as a refrigerant of the lean liquid. Furthermore, the difference in temperature between the water from the condenser and the lean liquid obtained after the heat exchange between the lean liquid and the rich liquid is caused by a heat pump that compresses and expands the medium with another medium, resulting in easy heat exchange. The water from the condenser is successively heated by using bleed steam from a steam turbine by a plurality of low pressure water supply heaters connected in series. The water from the condenser is branched, and one is supplied to an inlet port of the low pressure water supply heater on the uppermost stream, while the other is supplied to an inlet port of the low pressure water supply heater on the lowermost stream among the plurality of low pressure water supply heaters after being subjected to high temperature treatment with the heat pump. |
