Heat Integration in Sugar Plant "Case Study” Assalaya Sugar Factory, Sudan

Abstract

The main objective of this study is to reduce steam consumption in sugar plant, the reduce of steam consumption means reduce bagass consumption as fuel. The target of this process to divert this steam for generated electrical power shared with national net. The gain from this process is manufacturing sugar from cane with less cost depending on the by-product benefit and increase the profitability. Heat integration is a subdivision of a wider field of process integration, which is an efficient approach that allows industries to increase their profitability through reduction in energy, water and raw materials consumption, reduction in greenhouse gas (GHG) emissions and waste generation. Heat integration analysis principally the data which given and matches cold and hot process streams, then stream data extraction after determine temp approach (ΔTmin), when running of Heat Integration Net (HINT) technology software, generation of temp interval and cascade diagram ,Composite curve and construction of heat exchanger were appearing. The result of this study was, heat energy integration of Assalaia Sugar factory was carried out using pinch technology with HINT software. The minimum approach temperature of 20°C was used and the pinch point was found to be 120, 100°C for both hot and cold streams respectively. The hot utility requirements for the Company before (traditional) and after pinch analysis approach were found to be 1800 kW and the number of heat exchangers minimum 14 and installed are 3 and remaining is 12 heat exchangers. The important recommendation of this study was, the boiling of sugar in process house is under vacuum, that means in different of pressure and less temp of steam made boiling this process and maintain the sugar from the losses.