Abstract:

This paper took a 300 MW condensing power plant heating reform as an example. According to the parameters of heat user, two different renovation plans between reheat cold section and reheating section were analyzed. The results show that steam form reheating section through temperature reduction and pressure reduction is more fitting for the heating load and can meet the different heating demand. Furthermore, the economic performance was also analyzed. The unit can reduce the coal consumption of power generation by 7.22 g/(kW·h) under average extraction conditions, equivalent to 11 921 t every year. Considering the income of coal saving, the project investment payback period is 2.94 years, which has good economic benefits.

Key words: industrial heating, reheat cold section, reheating section, pressure and temperature reducing