Aplikasi Analisis Pinch untuk Menurunkan Konsumsi Steam di Bagian Process House Pabrik Gula

https://doi.org/10.22146/jrekpros.4940

Daniyanto(1*)

(1) 
(*) Corresponding Author

Abstract



Salah satu indikator efisiensi energi pabrik gula adalah Steam on Cane (SOC). SOC menunjukkan pemakaian steam tiap berat tebu. Semakin kecil SOC, efisiensi energi pabrik gula semakin baik. Sumber bahan bakar utama pabrik gula adalah bagasse. Bagasse merupakan ampas hasil ekstraksi tebu. Pabrik gula yang efisien akan memiliki SOC kurang dari 50%. Nilai SOC lebih dari 50% menyebabkan pabrik gula harus menggunakan tambahan bahan bakar selain bagasse. Jika SOC kurang dari 40 % berat tebu maka pabrik gula bisa melakukan kogenerasi dan menghasilkan listrik untuk dijual. Penelitian ini bertujuan untuk menurunkan SOC dengan cara menurunkan konsumsi steam di process house melalui inovasi konfigurasi proses dengan analisis pinch.
Hasil penelitian menunjukkan bahwa analisis pinch bisa digunakan untuk menurunkan konsumsi uap di pabrik gula. Penggunaan uap evaporator dari unit multiple effect evaporator akan mampu menurunkan konsumsi uap bagian process house. Perubahan konfigurasi proses memberikan penurunan SOC sebesar 8,8% dari kondisi semula. Uap evaporator 2 bisa digunakan untuk sumber panas pemanas 1 dan pemanas 2, uap evaporator 1 untuk sumber pemanas vacuum pan dan exhaust steam hanya digunakan untuk pemanas 1 dan vacuum pan.

Kata kunci: efisiensi energi, steam on cane, kogenerasi, konfigurasi proses, analisis pinch.

The energy efficiency of sugar factory can be indicated by variable steam on cane (SOC). SOC is defined as weight of steam consumption per weight of crushed cane. The smaller the SOC, the energy efficiency of sugar mills is better. The main source of fuel in sugar mill is bagasse. The sugar factory will be efficient if SOC is less than 50%. If SOC value is more than 50%, it will cause additional fuel other than bagasse. If SOC is less than 40%, the cane sugar mill can do cogeneration and produce electricity for sale. This study aims to reduce SOC by reducing steam consumption in the process house through configuration process innovation with pinch analysis.
The results showed that pinch analysis could be used to reduce steam consumption in sugar mill. Utilization of steam from evaporator could reduce steam consumption in the process house. The change in process configuration could provide SOC decrease by 8.8% from its former state. Steam produced by evaporator 2 could be used as heat source for heater 1 and heater 2, meanwhile steam produced by evaporator 1 as a heat source for vacuum pan. Exhaust steam could be used only for heater 3 and vacuum pan.

Keywords: energy efficiency, steam on cane, cogeneration, process configuration, pinch analysis.

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DOI: https://doi.org/10.22146/jrekpros.4940

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