PENGARUH POLA PENUMPUKAN DAN TINGGINYA TUMPUKAN BATUBARA TERHADAP POTENSI TERJADINYA PEMBAKARAN SPONTAN

Abstract

PT PLN UPK Nagan Raya is located in Suak Puntong village, Kuala Pesisir sub-district, Nagan Raya district, NAD. PT PLN UPK Nagan Raya is a company engaged in the PLTU industry which uses coal as the main fuel. The coal used in PT PLN UPK Nagan Raya comes from the companies PT Bukit Asam and PT Tiga Daya Energi. Due to the very large PLTU needs, the need for a large volume storage area, PT PLN UPK Nagan Raya has a stockpile with an area of 21,852 m2. Using the FIFO (first in first out) stacking method with Chevcon (truncated pyramid) and Chevron (cone) stacking patterns. Chevcon stacking area is 1181.4 m2 with a base length of 53.7 m, base width of 22 m, stack height of 8 m and stack volume of 3,825.86 m3, while Chevron stacking area is 3,120.9 m2 with a width of 63.5 m, height of 8 m, and stack volume of 8,322.48 m3. Coal piles are routinely checked for temperature every day, with heights of 2 meters, 4 meters and 6 meters. The chevron stacking pattern has a higher temperature than the chevcon stacking pattern. The average temperature of the chevcon pile with a height of 2 meters is 42.3˚C, a height of 4 meters is 47.1˚C and a height of 6 meters is 48.2˚C. While the temperature of the chevron stacking pattern with a height of 2 meters is 47˚C, the height of 4 meters is 50˚C and the height of 6 meters is 51.3˚C. With an average daily temperature of 29.9˚C. In coal piles, routine temperature checks are carried out, in coal piles there is a significant increase in temperature from the first day of accumulation with an initial temperature of 34˚C and the highest temperature in the pile is 59˚C. Coal piles that have spontaneous combustion have a temperature of 312˚C. Spontaneous combustion is triggered by the fire triangle, namely heat, air and fuel, not only these three elements can trigger spontaneous combustion but also the quality of coal