| 摘要 |
The invention relates to a process for retaining carbon dioxide from spent gases and to a plant for carrying out the process. According to the invention, the process consists in neutralizing the gases with a 2M solution of sodium and potassium carbonate with bicarbonate formation, followed by the thermal decomposition of the solution, at a temperature of 80...110°C, with release of COwhich is partially condensed and dried at a pressure of 2 bar, the carbon dioxide being released by pressure reduction and temperature increase up to 120°C, after which it is compressed and stored. The plant claimed by the invention consists of a tank (2) in which the neutralizing solution is prepared, a pressure pump (3) which sends the 2M solution to a spent gas mixing zone (5) of a centrifugal scrubber (1) representing the absorption column, where the mixture is pulverized through a nozzle (7), the CO-containing solution being discharged at the bottom of the scrubber, passed through a filter (9) and an exchanger (10) and entering the top part of a desorption column (11), wherefrom the resulting flow of CO-rich vapour is passed through a condenser (12) and a drier (13) to the compression and storing zone. |
