400-ton/hour-level supercritical boiler generator set with middle primary reheating back pressure

The utility model relates to a 400-ton/hour-level supercritical boiler with intermediate primary reheating backpressure generator set, which comprises a 400-ton/hour-level supercritical primary reheating boiler, a superheater and a reheater, wherein the superheater and the reheater are positioned on the boiler; the output end of the superheater is communicated with a first steam input port of a backpressure steam turbine; an output shaft of the back pressure type steam turbine is connected with an input shaft of the generator, the back pressure type steam turbine is provided with a first steam output port communicated with a steam input port of the reheater, and a steam output port of the reheater is communicated with a second input port of the back pressure type steam turbine; the back pressure turbine is provided with output ports for supplying heat to the outside, and the output ports are the first steam output port, the steam extraction port and the second steam output port respectively. The device has th