Marine nuclear power direct-current evaporator water-feeding deep-deoxygenizing system and method

The invention relates to marine nuclear power direct-current evaporator water-feeding deep-deoxygenizing system and method. The system comprises a condenser bubbling and deoxygenizing device, a low-pressure heater, a deoxygenator, an oxygen membrane removing device and a dosing device, wherein the bubbling and deoxygenizing device is integrated into a condenser and is connected with dead steam, and meanwhile, the condenser is further connected with the low-pressure heater through a condensate pump; the low-pressure heater is connected with the dead steam, and meanwhile, the low-pressure heateris connected with an injection port of the deoxygenator; the deoxygenator is connected with extracted steam from a turbine or fresh steam, and meanwhile, the deoxygenator is connected with an water supply system; the dosing device is connected with the water supply system; the oxygen membrane removing device is integrated into a balanced water tank; and the balanced water tank is connected with the condenser. According t