#TITLE_ALTERNATIVE#

• Main Author: AGNI DWI HARMASTUTI ( NIM :15311004 ), EUGENIA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21996
• Institution: Institut Teknologi Bandung

Power plants have an important role in in supplying electric energy in Indonesia. The rise of electric energy demand in Indonesia cause the increase of power plants developments, in particular for coal power plant. XYZ power plant is one of coal power plants and it is the biggest plant in Indonesia. In addition to positive benefits of power plants for the infrastucture development in Indonesia, coal power plant might also has negative impacts for environment, typically for air pollution like gas emissions of SO2 (Sulfur Dioxide). While, in Indonesia, especially in XYZ plant, there is no optimum SO2 controller yet. The concentration of SO2 in the gas emitted from boiler unit 7th in XYZ plant has reach 3.999 mg/Nm3. This value exceed the quality standard in Regulation of the Minister of Environment No. 21 of 2008, that is 750 mg/Nm3. Therefore, to control the quite high emissions of SO2, the requirement of planning FGD (Flue Gas Desulphurization) is important. The system of FGD is lime scrubbing, consist of lime processing (lime bunker, grinding mill, and lime slurry tank), SO2 scrubbing (packed column), effluent hold tank, gypsum centrifuge, also wastewater treatment (thickener) and belt filter press as dewatering unit. The designing procedur resulting the dimensions of the packed column, that is diameter of 7 m and height of 11 m with 25 nozzles, vane mist eliminator and using Raschig-rings 2 inch as packing material. The design of effluent hold tank has width dimension of 7 m and depth dimension of 2,5 m. Lime requirement to reduce SO2 concentration is 389 kg/day. This system will consume about 14.860 kW of electricity. This air pollution control is expected to be 81,25% of SO2 removal, where the emissions concentration from power plant is compared with the quality standard.