There is a common mismatch between heating supply and demand parameters for industrial heating retrofits of pure condensing thermal power units

and the benefits of thermal power plants can be improved by adopting a reasonable matching scheme of supply and demand parameter. Aiming at the phenomenon of energy mismatch caused by the excessively high extraction parameters of the unit in the industrial heating scene

considering that it is suitable for high-parameter industrial heating

this paper proposes a scheme of using the centripetal turbines for cascade utilization of extraction steam. Taking the industrial heating transformation of a domestic 330 MW cogeneration unit as an example

the thermal system model was constructed to comprehensively evaluate the performance indicators changes of the system from three aspects: thermal performance

exergy environment and economic performance. We also comprehensively compared the effect of upgrading the direct heat reduction and pressure reduction method to the radial turbine power generation steam energy cascade utilization scheme. The calculation results show that under the same heating parameters

compared with the traditional method of temperature reduction and pressure reduction

the comprehensive benefits of the industrial heating steam energy cascade utilization scheme based on centripetal turbine power generation is significant. The specific performance is that under rated conditions

the gross coal consumption rate for power generation can be reduced by 0.89 g/(kW·h)

the extraction exergy efficiency can reach 97.66%

and the direct economic benefit is relatively increased by 1.04%

and the carbon transaction cost relative reduction of 0.34%. In addition

the relative advantages of all aspects performance of the system will expand with the increase of the amount of steam extracted by the system for industrial heating.