Studi Numerik Pengaruh Variasi Sudut Tilting Burner Arah Negative Pada Co-Firing Biomassa Terhadap Potensi Slagging Dan Fouling Pada Tangentially Fired Pulverized Coal Boiler PLTU 300 MW

Kurniawan, Wahyu Tri Laksono (2026) Studi Numerik Pengaruh Variasi Sudut Tilting Burner Arah Negative Pada Co-Firing Biomassa Terhadap Potensi Slagging Dan Fouling Pada Tangentially Fired Pulverized Coal Boiler PLTU 300 MW. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangkit Listrik Tenaga Uap (PLTU) berbahan bakar batubara masih menjadi sumber utama pembangkit listrik, namun emisi karbon yang dihasilkan memberikan dampak signifikan terhadap lingkungan serta ketersediaan Low Rank Coal (LRC) di Indonesia sangat melimpah sehingga diperlukan solusi yang lebih ramah lingkungan, salah satunya melalui penerapan metode co-firing biomassa. Studi numerik ini menganalisis pengaruh variasi sudut kemiringan negative (tilting) burner tangensial, dengan burner D dan E diarahkan ke bawah dan sebagian tetap horizontal dengan variasi presentase batubara nilai kalor rendah pada kondisi co-firing biomassa ( terhadap distribusi temperatur, profil kecepatan, emisi gas buang (CO₂, CO, SO₂,), serta evaluasi potensi slagging dan fouling pada boiler PLTU 300 MW tipe Tangentially Fired. Menggunakan simulasi Computational Fluid Dynamics (CFD) dengan perangkat lunak ANSYS Fluent. Metode yang digunakan adalah direct premixed, Percampuran biomass dengan baturbara dengan presentase batu bara 3% dan 5%. sedangkan variasi sudut elevasi burner diterapkan pada -5°, dan -10° pada burner elevasi D dan E. Selain itu,penelitian ini juga mempertimbangkan nilai Higher Heating Value (HHV) sebesar 3800 kcal/kg. Hasil simulasi menunjukkan bahwa peningkatan sudut tilting negative menggeser zona pembakaran ke bawah,penurunan temperatur FEGT dan outlet untuk semua variasi HHV 3800 kcal/kg+3% biomassa maupun variasi HHV 3800 kcal/kg+5% biomassa. Dari sisi emisi, HHV 3800 kcal/kg+3% biomassa sudut tilt mampu menurunkan fraksi massa CO₂ di outlet menjadi, namun meningkatkan emisi CO menjadi yang mengindikasikan pembakaran kurang sempurna. Lalu, emisi SO2 sudut tilt mengalami penurunan. Analisis slagging dan fouling berdasarkan temperatur leleh abu (AFT) menunjukkan bahwa slagging tidak terjadi karena temperatur gas maksimum masih di bawah batas fluid temperature ash, sementara risiko fouling lebih dominan.
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coal-fired Steam Power Plants (CFPPs) remain the primary source of electricity generation. however, the carbon emissions they produce have significant environmental impacts. In addition, Indonesia possesses abundant reserves of Low Rank Coal (LRC), creating opportunities to implement cleaner technologies such as biomass co-firing. This numerical study investigates the effect of negative tangential burner tilting, in which burners D and E are directed downward while the remaining burners remain horizontal, on the temperature distribution, flue gas velocity profile, flue gas emissions (CO₂, CO, and SO₂), and the slagging and fouling potential in a 300 MW tangentially fired boiler under biomass co-firing conditions. Computational Fluid Dynamics (CFD) simulations were performed using ANSYS Fluent. The direct premixed method was employed by mixing biomass with coal at biomass co-firing ratios of 3% and 5%, while the burner tilting angles were varied at -5° and -10°. In addition, the fuel Higher Heating Value (HHV) was maintained at 3800 kcal/kg. The simulation results show that increasing the negative burner tilting angle shifts the combustion zone downward, leading to lower Furnace Exit Gas Temperature (FEGT) and economizer outlet temperatures for both the HHV 3800 kcal/kg + 3% biomass and HHV 3800 kcal/kg + 5% biomass cases. In terms of emissions, the HHV 3800 kcal/kg + 3% biomass case with negative burner tilting reduced the outlet CO₂ mass fraction but increased CO emissions, indicating less complete combustion, while SO₂ emissions decreased with increasing negative tilting angle. Furthermore, the slagging and fouling analysis based on Ash Fusion Temperature (AFT) indicates that slagging is unlikely to occur because the maximum flue gas temperature remains below the ash fluid temperature, whereas the risk of fouling is more dominant.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Co-firing, Boiler, Tilting, HHV, Biomassa, Co-firing, Boiler, Tilting, HHV, Biomass
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Wahyu Tri Laksono Kurniawan
Date Deposited:	04 Aug 2026 09:46
Last Modified:	04 Aug 2026 09:46
URI:	http://repository.its.ac.id/id/eprint/143469

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