Low-pressure drain cooler regenerative system and generator set

The utility model provides a low-pressure drain cooler regenerative system and a generator set. The low-pressure drain cooler regenerative system utilizes the heat of drain water of a low-pressure heater. A low-pressure drain cooler system heats low-pressure drain water of the low-pressure heater, and after the drain water is heated to be vaporized, the produced steam is guided back to the low-pressure heater. The low-pressure drain cooler regenerative system can solve the problem that water is not drained smoothly between low-pressure heaters, and the purposes of indirectly heating condensation water, reducing the steam extraction amount and improving set economical efficiency can be achieved.