The antifreezing method of 330MW direct air cooling cogeneration unit operating in winter, especially in the extreme cold weather, is still in experience accumulation and exploration period. According to the existing operation mode,  continuous optimization and adjustments,such as raising the back pressure of units, starting the standby vacuum pump and exit isolation column, are made to meet the winter antifreezing requirements and overcome the code winter.

direct air cooling, operation and adjustment, antifreezing