Evaluation of Slagging and Fouling Indices in Boilers, for Steam Power Plant

Prima Aryandi, Jusfarida Jusfarida, Hendra Bahar, Avelyn Shintya Sari, Fairus Atika Redianto Putri, Korchnoi Pasaribu

Abstract

Coal acts as the primary fuel for the boiler at PLTU to support the combustion process. The boiler serves as the main steam generator in this coal-fired power plant. During combustion, coal produces ash that deposits and leads to slagging and fouling, two conditions that reduce boiler efficiency and performance. This study analyses how slagging and fouling affect the performance of Boiler at PLTU. Using a quantitative approach, the research evaluates coal quality data (proximate and ultimate analyses), ash compound content, sulphur levels, and calculates slagging and fouling indices in relation to boiler performance. The results show that the slagging index ranges from 0.15 to 0.77 and the fouling index from 0.19 to 0.48, indicating a low to moderate tendency. When these indices are at their lowest, boiler efficiency reaches 88.05% (direct method) and 86.09% (indirect method). At their highest, efficiency drops to 78.25% and 78.65%, respectively. This decline increases coal consumption for electricity generation. These findings highlight the need for regular inspection of ash content and coal quality to reduce the negative effects of slagging and fouling on overall boiler performance.

Keywords

Boiler Efficiency; Coal; Fouling; Power Plant; Slagging

Full Text:

PDF

References

Brotowati, S. (2018). Peningkatan kualitas batubara subbituminus mallawa menjadi batubara bituminus. Intek: Jurnal Penelitian, 5(1), 34–38. https://doi.org/10.31963/intek.v5i1.197

Dhafin Umara. (2025). Analisis peran na, k, ca, dan fe terhadap potensi slagging dan fouling pada pembakaran lignit, Sub-Bituminus, dan ampas tebu. Akta Kimia Indonesia, 10(2), 82–97. https://doi.org/10.12962/aki.v10i2.8869

Edy Sarwono, & Indra Saputra. (2023). Pemakaian metode ASME PTC 4.1 Pada evaluasi performa (efisiensi) boiler pulverized firing di pembangkit listrik tenaga uap (PLTU). Radial Jurnal Ilmiah Sains Dan Rekayasa, 1(1), 51–60. https://doi.org/10.62024/radial.v1i1.6

Fadhilla Inaswara, Sudia, B., & Sisworo, R. R. (2022). Analisis pengaruh fouling dan slagging terhadap kinerja boiler subcritical pada PLTU moramo. Enthalpy Jurnal Ilmiah Mahasiswa Teknik Mesin, 6(2), 50–50. https://doi.org/10.55679/enthalpy.v6i2.19344

Hasan Basri, M., Tijaniyah Tijaniyah, & Moyo, R. (2023). Slaging analysis based on boiler wall temperature at PLTU paiton unit 3. Jurnal Ilmiah Teknik Elektro Komputer Dan Informatika, 9(2), 363–374. https://doi.org/10.26555/jiteki.v9i2.26202

Ika Yuliyani, Indriyani Sumitra, & Muna Indrayana. (2021). Evaluasi indeks slagging dan fouling pada boiler batubara jenis lignit dan bituminus. Jurnal Rekayasa Mesin, 16(3), 299–299. https://doi.org/10.32497/jrm.v16i3.2393

Imam Muzaki, & Aqli Mursadin. (2019). Analisis efisiensi boiler dengan metode input– output DI PT. japfa comfeed indonesia Tbk. UNIT banjarmasin. Scientific Journal of Mechanical Engineering Kinematika, 4(1), 37–46. https://doi.org/10.20527/sjmekinematika.v4i1.50

Jurnal, R. T. (2018). Pengaruh fouling terhadap LAJU perpindahan panas PADA superheater boiler CFB PLTU sebalang. Power Plant, 6(1), 48–57. https://doi.org/10.33322/powerplant.v6i1.72

Lukitari, E. S. V. (2023). Sustainable life cycle analysis (LCA) approach and reduction of Potential slagging, fouling and corrosion problems in Boilers of Power generation systems at Coal - fired power plants.

International Journal of Science and Research (IJSR), 12(1), 1123–1129. https://doi.org/10.21275/sr23126120029

Nanda Kumara. (2021, August 24). Studi pengaruh heat rate terhadap kinerja pada pltu biomassa DI pt. harjohn timber. Academia.Edu; Faculty of Engineering, Universitas Tanjungpura. https://www.academia.edu/90197985/studi_pengaruh_heat_rate_terhadap_kinerja_pada_pltu_biomassa_di_pt_harjohn_timber

Nurakhmi Qadaryati, Praditya, D. T., Hidajat, W. K., & Indriyani Martiningtyas. (2019). Penentuan lingkungan pengendapan batubara berdasarkan karakteristik dan maseral batubara di PT x, kabupaten nunukan, kalimantan utara. Jurnal Geosains Dan Teknologi, 2(3), 107–107. https://doi.org/10.14710/jgt.2.3.2019.107-116

Pahlevi, R., Thamrin, S., Ahmad, I., & Nugroho, F. B. (2024). Masa depan pemanfaatan batubara sebagai sumber energi di Indonesia. Jurnal Energi Baru Dan Terbarukan, 5(2), 50–60. https://doi.org/10.14710/jebt.2024.22973

DOI: https://doi.org/10.31284/j.jtm.2026.v7i2.9214

Refbacks

  • There are currently no refbacks.