Waste heat recovery and power generation in cement works

In cement plant, about 90% of total energy is used as heat energy in the clinker calcination process. Out of total heat consumed in the clinker calcination process, more than 35% of heat is discharged as waste heat to the surroundings without utilization. Therefore, a great deal of energy is wasted, and the heat pollution in the workplace is serious. In this study, a waste heat recovery (WHR) captive power plant will be installed to effectively utilize the low temperature waste heat of the exit gases from Suspension Preheater (SP) and Air Quenching Chamber (AQC). The Greenhouse Gases (GHG) emission reductions due to recovery of heat and displacement of fossil fuel by generation of steam and electricity are considered as emission reductions of the project activity. The analyses are conducted based on using the methodology of Clean Development Mechanism(CDM).It is found that the expected annual power generation is 58,500MWh. The project will displace an equivalent amount of annual power currently drawn from the grid, leading to emission reductions of approximately 52,878 tons CO 2 equivalent annually.