Single-row high-pressure heater system for secondary reheating unit of 1000 MW grade

The utility model discloses a single-row high-pressure heater system for a secondary reheating unit of the 1000 MW grade. The single-row high-pressure heater system comprises a plurality of high-pressure heaters sequentially connected in series through water supply pipelines. Water drain openings of the high-pressure heaters are sequentially connected in series. The system water supply pipelines, steam extraction pipelines and heater water drain pipelines are of one-way types, compared with two-row high-pressure heaters, the system is simple, the pipelines are reduced, valves in a pipe system are reduced, thermo-technical measuring points and control are relatively simple, operation control is relatively convenient, the steam extraction pipelines and the water supply pipelines of all the high-pressure heaters are relatively short, resistance is small, and the benefit is brought to thermal loss of a steam turbine; moreover, single-side operation can not be achieved through the two-row high-pressure heaters, and the advantage of the single-row high-pressure heaters is obvious in the aspect of the technology.