ARTA, Mochamad Zainudin Ade and Widayat, Widayat and Muchammad, Muchammad (2024) ANALISIS CO-FIRING BAHAN BAKAR JUMPUTAN PADAT (BBJP) DAN BATUBARA TERHADAP PERFORMA PADA PULVERIZED COAL BOILER. Masters thesis, UNIVERSITAS DIPONEGORO.

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Abstract

Untuk mereduksi emisi Gas Rumah Kaca (GRK), Pemerintah Indonesia mengajukan kebijakan untuk mengaplikasikan teknologi berbasis Energi Terbarukan (EBT) di PT PLN (Persero) dengan menerapkan co-firing di PLTU batubara. Co-firing merupakan metodologi dimana biomassa dimasukkan sebagai sumber bahan bakar tambahan dalam sistem pembakaran di dalam boiler PLTU berbahan bakar batubara. Untuk mengetahui karakteristik co-firing biomassa BBJP dilakukan pengujian terhadap PLTU jenis Pulverized Coal Boiler dan uji laboratorium untuk mendapatkan informasi karakteristik biomassa BBJP melalui Analisis Proksimat (Proximate Analysis) dan Analisis Ultimate (Ultimate Analysis). Adapun uji karakteristik co-firing untuk mengetahui pengaruh co-firing terhadap arus motor pulverizer, coal flow, pulverizer oulet temperature, AFR pulverizer, NPHR (Net Plant Heat Rate), Specific Fuel Consumption (SFC) dan emisi. Metode yang digunakan yaitu direct co-firing dengan komposisi biomassa BBJP sebesar 0-5%. Hasil pengujian menunjukkan bahwa Gross Caloric Value (as received) dan Hardgrove Grindability Index (as received) biomassa BBJP 2.637 Kcal/kg dan 20,09. Hasil uji terhadap Arus Pulverizer, pulverizer outlet temperature, AFR pulverizer mengalami kenaikan seiring peningkatan persentase biomassa BBJP. Sebaliknya untuk coal flow mengalami penurunan ketika persentase biomassa BBJP mengalami peningkatan. Hasil uji co-firing biomassa BBJP mampu menghemat pemakain batubara dibandingkan coal-firing. Hasil uji Specific Fuel Consumption (SFC) co-firing biomassa BBJP 5% sebesar 0,59 dengan produksi listrik netto 552.566 kWh dan NPHR 2.593 kcal/kWh. Selain itu co-firing biomassa BBJP 5% mampu mereduksi emisi karbon dioksida sebesar 148.381 ton/tahun terhadap coal-firing.
Kata Kunci : co-firing, coal-firing, biomassa, pulverizer, Specific Fuel Consumption

To reduce Greenhouse Gas (GHG) emissions, the Government of Indonesia has proposed a policy to apply Renewable Energy (RE) based technologies at PT PLN (Persero) by implementing co-firing in coal-fired power plants. Co-firing is a methodology where biomass is included as an additional fuel source in the combustion system inside the boiler of a coal-fired PLTU. To determine the co-firing characteristics of BBJP biomass, tests were carried out on Pulverized Coal Boiler type PLTU and laboratory tests to obtain information on the characteristics of BBJP biomass throughProximate Analysis and Ultimate Analysis. The co-firing characteristics test to determine the effect of co-firing on pulverizer motor current, coal flow, pulverizer oulet temperature, AFR pulverizer, NPHR (Net Plant Heat Rate), Specific Fuel Consumption (SFC) and emissions. The method used is direct co-firing with BBJP biomass composition of 0-5%. The test results showed that the Gross Caloric Value (as received) and Hardgrove Grindability Index (as received) of BBJP biomass were 2,637 Kcal/kg and 20.09. The test results of Pulverizer Flow, pulverizer outlet temperature, AFR pulverizer increased as the percentage of BBJP biomass increased. Conversely, the coal flow decreased when the percentage of BBJP biomass increased. BBJP biomass co-firing test results can save coal usage compared to coal-firing. The Specific Fuel Consumption (SFC) of 5% BBJP biomass co-firing is 0,59 with net electricity production of 552.566 kWh and NPHR of 2.593 kcal/kWh. In addition, 5% BBJP biomass co-firing is able to reduce carbon dioxide emissions by 148.381 tons/year against coal-firing.
Keywords: co-firing, coal-firing, biomass, pulverizer, Specific Fuel Consumption

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