The present situation of heat supply for Zhengzhou cogeneration unit and the new technology of waste heat utilization based on absorption heat transfer are introduced. It is found that through the heat supply transformation and waste heat recovery of the pure coagulation unit

the heat supply capacity of cogeneration will reach 5 613 MW and the heating area will be 120 million m

2

. The cogeneration will meet the long-term growing demand of Zhengzhou’s urban heat supply and realize urban clean heating.