Low temperature waste heat recovery and utilization of cooling water system in boiler slag cooler

Circulating fluidized bed (CFB) boiler slag contains a large amount of waste heat, which is gradually becoming a hotspot of waste heat recovery and utilization research. Taking an actual project in Qingdao as an example, designs two waste heat recovery schemes for meeting the temperature requirement of cooling water in the slag cooler (80 ℃/30 ℃). Adopts two absorption heat pumps for scheme 1 and one centrifugal heat pump plus plate heat exchanger for scheme 2. The economic analysis results show that the scheme 1 is better and is finally selected in the project.