Flue gas dewatering system

The invention relates to a flue gas dewatering system. In the existing desulfurization system, flue gas takes away a great amount of water after passing through the desulfurization system and waste of water is caused. The flue gas dewatering system provided by the invention comprise a water tank (2), a cooling coil (4), a water pan (5), a demister (6), a chimney (7) and a cooling medium system (17), wherein the cooling coil (4) is arranged in a flue at the lower portion of the chimney (7), the demister (6) is arranged above the chimney, the water pan (5) is located below the demister (6), the water pan (5) is connected with the water tank (2) outside the chimney through a connecting pipe, the inlet and outlet of the cooling coil (4) are connected to the cooling medium system (17), and the inlet of the cooling coil (4) and the cooling medium system (17) are provided with cooling water pumps (15) to enable cooling medium to cyclically flow in the cooling coil (4) and the cooling medium system (17). By using the flue gas dewatering system, a great amount of water is saved.