Method and device for high-temperature ultrahigh-pressure reheating waste heat power generation

The invention relates to the technical field of environmental protection equipment, in particular to a method and a device for high-temperature ultrahigh-pressure reheating waste heat power generation. The method comprises the following steps that an induced draft fan is utilized to send 1000-1170 DEG C ascension pipe high-temperature flue gas generated in the coke production line productive process to a high-temperature ultrahigh-pressure reheating waste heat boiler through a gas collecting pipeline for heat exchange to generate 13.7 MPa and 540 DEG C high-temperature ultrahigh-pressure steam, and a generator set is used for generating electricity. According to the method and the device for the high-temperature ultrahigh-pressure reheating waste heat power generation, the high-temperatureultrahigh-pressure reheating waste heat power generation technology is adopted to replace an existing 3.82 MPa and 450 DEG C medium-temperature medium-pressure waste heat power generation technology,and the power generation steam consumption rate is about 3 kg/kWh, so that the system energy utilization efficiency is improved by 30% or above, and the boiler type structure and the part configuration of the high-temperature ultrahigh-pressure reheating waste heat boiler is reasonable; high-efficiency heat transfer components are adopted, and a steam reheating device is arranged so that the system energy utilization efficiency can be effectively improved; partial medium-pressure steam can be extracted for reheating by an intermediate stage of a steam turbine and then is returned to the steamturbine to do work so that the system heat cycle efficiency can be effectively improved.