Waste Heat Recovery for Power Generation in Cement plants

Energy audit is a technique used to evaluate the thermal energy performance of the pyroprocessing unit in cement plant. Thermal energy audit in cement plant allows reduction of specific energy consumption and also optimizing the process. For this purpose, waste heat in process should be minimized. Thermal energy audit operation is performed by effort to balance total energy input with its output. In new studies, additional methods for more energy conservation on basis of thermal energy audit are investigated. A good example for this saving opportunity is waste heat recovery from kiln exhaust gases and cooler discharge gas. The results shown that the kiln and cooler exhaust gases are the major sources of thermal energy losses, amounting to 23.81% and 14.72%, respectively. Waste heat recovery from two streams output for power generation has been investigated. WHRSG can recover waste heat and produce super heated vapor for generation of 6 MW of electricity, which could lead to annual power savings of 4.32 * 104 MWh/year..

Keywords:

Waste Heat Recovery , Cement Plant , Energy Balance , Mass Balance , Energy Audit