REDESIGN OF AIR POLLUTION CONTROL SYSTEM FOR SULFUR DIOXIDE GAS EMISSION AT PLTU A

• Main Author: Factria Utami, Deananda
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/54027
• Institution: Institut Teknologi Bandung

PLTU A is a steam power plant that uses coal as fuel to generate electricity. The resulting electricity capacity is 660 MW for unit 1 at PLTU A. The rate of use of coal to reach this capacity is 275,132.5 kg/hour. The sulfur content of the coal used is 0.63%. Based on the results of CEMS measurements, the concentration of sulfur dioxide (SO2) emitted before going through the existing FGD was 1,375,481 mg/Nm3. Even though unit 1 of PLTU A already had FGD with limestone absorbent, the highest emission concentration of SO2 after going through the FGD was 540.07 mg/Nm3. This concentration almost exceeds the quality standard of SO2 emissions from thermal power plants in the Minister of Environment and Forestry Regulation No. 15 of 2019, attachment 1, which is 550 mg/Nm3. Therefore, it is necessary to redesign the existing SO2 control system so that the resulting emissions do not pass the quality standard and the efficiency or reliability of the FGD at unit 1 of PLTU A increases. The designed FGD system consists of a limestone processing unit, scrubber, and waste handling. The choice of absorbent is done by weighting method. The selected absorbent is limestone which can remove SO2 up to 97%. Based on the design results, the planned investment cost for the selected system is IDR 32,894,072,387. Meanwhile, the planned budget for operational costs is IDR 5,954,680,229 per year.