METHOD AND DEVICE FOR SEPARATING CARBON DIOXIDE FROM AN EXHAUST GAS OF A FOSSIL-FIRED POWER GENERATING PLANT

摘要

The invention concerns a separating device (1) for carbon dioxide. The separating device (1) substantially comprises an absorption unit (2), for taking up flue gas from a fossil-fired power generating plant, a desorption unit (4) and a heat exchanger (5). The heat exchanger (5) is connected on the primary side in a feeding manner via an inlet-side return line (6) to the desorption unit (4), and in a discharging manner via an outlet-side return line (7) to the absorption unit (2). On the secondary side, the heat exchanger (5) is connected in a feeding manner via an inlet-side feed line (8) to the absorption unit (2) and in a discharging manner via an outlet-side feed line (9) to the desorption unit (4). Furthermore, a first bypass line (10) is provided, by which the inlet-side return line (6) is connected to the outlet-side feed line (9), such that an at least largely closed first circuit is formed with the desorption unit (4), and moreover a second bypass line (11) is provided, by which the inlet-side feed line (8) is connected to the outlet-side return line (7), such that an at least largely closed second circuit is formed with the absorption unit (2).