Reheater for ultra-supercritical double reheat unit

The utility model belongs to the field of ultra-supercritical double reheat large-scale thermal power generating units, and relates to a method for enabling the heat exchange area required by double reheat to be matched with a thermodynamic system, in particular to a reheater for an ultra-supercritical double reheat unit. Through the adoption of the arrangement scheme, the heating surface required by the reheater is reduced, the reheater can be reasonably matched with the thermodynamic system, and exhaust steam of a water-feeding pump steam turbine is absorbed by adopting a hybrid heater, so that the heat exchange area is reduced, and the initial investment of a power plant is reduced; the steam extraction heat of the water-feeding pump steam turbine is recycled to the thermodynamic system finally, so that the economical efficiency of the power plant is improved. Therefore, by virtue of the scheme provided by the utility model, the reduction of the initial investment of the power plant and the improvement of the running benefit of the power plant are facilitated.