Technologies and application of waste heat recovery in petrochemical plants for cogeneration district heating

Discusses the feasibility of comprehensive cascade utilization of the low grade waste heat recovery in the petrochemical industry. Analyses the types, capacity and characteristics of the waste heat resources. Taking a cogeneration power plant as an example, designs a technological scheme, combining direct heat exchange of high grade waste heat with absorption heat pump recovery of low grade waste heat. The engineering test results show that the energy saving effect of waste heat utilization is obvious，contributing to social economic benefits and environmental protection.