In order to realize cascade utilization of energy in the heating system

in view of the problem that the heat load of industrial users does not completely match the heat consumption for activated carbon regeneration

the steam-air heater has been installed in flue gas desulpherization and denitration demonstration unit for No.2coal-fired generation unit in a thermal power plant. Steam becomes primary heat source to realize activated carbon regeneration. Steam extracted from the turbine heats circulating hot air in the FGD unit firstly

then supplies remaining heat energy to different terminals outside the plant after desuperheating. Hereby this article thoroughly describes how to select control valve in steam supply system

so as to realize coupling control of heat energy between two different users. The rationality of this design has been verified during actual operation of the demonstration project

and it provides a reference for the selection of control valves in future engineering practices.