Heat Integration and Retrofit of Distillation Unit

Distilation unit is used as a case study in this work. three units of this plant, atmospheric and vacuum units and S.R.G. unit, were focused to reduce energy consumption. Data and information are collected from Esfahan refinery and commercial simulation software, Aspen Tech provision is used to simulate unmeasured data and determine thermodynamic properties. Grand composite curve are used as tools to study the energy integration. Distillation unit consists of seven distillation columns, 21 hot and 10 cold streams. For this unit the optimum ∆Tmin determine 33◦C. According to process integration, the modification of Distillation unit can be achieved by adding new heat exchanger. Four heat exchanger were chosen to be used for unit. The maximum heat recovery can save about 9.2464% of overall energy consumption in furnace and cold utility consumption reduce.

Keywords:

Pinch analysis , Energy recovery , Process , Heat exchanger network , Distillation unit