INTEGRA O ENERGéTICA DA ETAPA DE EXTRA O DE óLEO DE SOJA UTILIZANDO ANáLISE PINCH

In this paper, a case study of energy integration in extraction phase in a soybean oil factory was performed. Based on the thermal potential change, two hot and two cold currents were selected from a set of streams of soybean oil extraction phases. A first hot current (Q1) transports crude oil with 110 and 80oC as input and output temperatures, respectively, while the second one (Q2) transports water that comes out from a boiler with a 90°C input temperature and it needs to be reduced to 55°C output temperature. A first cold current (F1) transports water that comes out from a decanter and it needs to be heated from 40 to 90°C, while the second one (F2) transports a oil-hexane (70% - 30%) mixture with 60°C input and 90°C output temperatures. The Pinch Analysis was chosen as a synthesis methodology for the heat exchanger network synthesis. A cost analysis was carried out, verifying a 79,6% steam consumption economy, after the pinch analysis-based energy integration, performing a 77,5% (5.3% overall consumption of plant) annual total cost reduction and showing a utilities investment return on three months.