Análise técnico econômica do processo de armazenamento e transferência de monoisopropilamina

Abstract

This work is a study case of an agrochemical plant where there was a significant loss, scrap factor, of monoisopropylamine (MIPA) due the evaporation process of this material. One of the main points identified in this process is that the temperature of the MIPA storage tanks is averages 33,7 °C. The atmospheric boiling point of MIPA is 32 °C, hence the high loss percentage of this product. Analyzing MIPA’s scrap factor in the last four years it was found an average of 1,38% of losses in this period due evaporation. To overcome this problem, it is proposed a system to cool MIPA to temperatures below its boiling point. The chosen temperatures were 25 °C, 18°C e 11°C and the energy balance for those temperatures were calculated considering the MIPA’s mass flow rate of 0,42 kg/s. Then, an analysis of the of the heat exchanger available at the plant was done and the results pointed a necessity for a new equipment that had a higher nominal capacity. A decrease in the loss by evaporation at 25 °C, 18°C e 11°C were evaluated at de 27%, 45% e 59%, respectively. The payback period for this investment to recover all the funds invested was around three years proving the economic value of this project.