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Journal : AUSTENIT

THE ENHANCEMENT OF TEMPERATURE IN BOILER BY STEAM INJECTION Septiana, Iriani Reka; Daniar, Rima; Puspa, Dilia; Kholidah , Nurul
AUSTENIT Vol. 15 No. 2 (2023): AUSTENIT: October 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i2.7043

Abstract

The boiler is equipment widely used in various industrial sectors such as power plants, fertilizer plants, paper mills, and others. The combustion chamber is an important part of the boiler which can determine the quality of the steam product. The main problem has happened in combustion chambers such as unburned hydrocarbon/carbon loss which is called fouling. Fouling has occurred in many boilers, which use coal or oil as fuel for the production of steam and decreases boiler performance. The purpose of this research is to increase temperature by adding steam injection to reduce fouling to compare with and without steam injection. Two indicators that have the potential to enhance heat transfer are the elevation in temperature and the reduction in fouling percentage. The variables in this research were air flow of 15 L/min, 17,5 L/min, and 20 L/min and steam injection pressure of 2 bars, 3 bars, and 4 bars. The maximum temperature enhancement was 37,5% in 15 L/min of air flow at a steam injection pressure of 2 bars and 3 bars. The maximum fouling abatement was 78,57% in 15 L/min at a steam injection pressure of 4 bars.
PERFORMANCE ANALYSIS OF BIO-BRIQUETTING MACHINE WITH SCREW EXTRUDER TYPE BASED ON QUALITY OF BIO-BRIQUETTES Puspa, Dilia; Yerizam, Muhammad; Zamheri, Ahmad; Wardhana, Agum Try
AUSTENIT Vol. 15 No. 2 (2023): AUSTENIT: October 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i2.7218

Abstract

he purpose of this study is to design a bio-briquetting machine with screw extruder type to convert biomass into higher density based on quality standard of charcoal briquette SNI 01-6235-2000 and SNI 19-4791-1998. The machine had production capacity of 30 kg/hour, equipped with the motor of 1 HP which transmitted to the machine through pulley and belt, and also has cutter which rotates continuously. The raw materials of the bio-briquette were using bagasse and coconut shells. There are 6 parameters that are used to test the quality of bio-briquette such as calorific value, inherent moisture, ash content, dependability pressure, volatile matter content, and fixed carbon content. The bio-briquette was made from the raw materials using amylum adhesives with ratio 30:70:30. With feed as 5 kg, the machine produced 50 pieces of bio-briquette. The machine could produce good bio-briquettes such as calorific value of 6,511.3 cal/g, inherent moisture of 1.97%, ash content of 5.88%, volatile matter of 27.71%, fixed carbon content of 64.99% and compressive strength was 16.98 kg/cm2.