Energy and economy savings in the process of methanol synthesis unsig Pinch technology

Abstract

A heat exchanger network (HEN) for the process of methanol synthesis has been studied by pinch design analysis. Great economic and energy savings were realized by the pinch analysis in comparison to the existing plant. Also, it was found that it is possible to reduce the requirements for the consumption of utilities. The HEN was reconstruded by adding new heat exchangers. In order to produce new HEN, the capital costs had to be increased, but the total cost trade-off between the capital and energy costs will be decrease by 30 %.

U ovom radu je pokazano kako se primenom Pinch metodologije na rekonstrukciju postojeće mreže razmenjivača toplote, u posmatranom industrijskom postrojenju mogu dobiti znatne energetske i ekonomske uštede. Proučavan je proces sinteze metanola i prikazana je mogućnost smanjenja troškova vezanih za energetske zahteve u procesu pre svega vezanih za korišćewe pomoćnih toplotnih izvora. Dobijeni rezultat ukazuje da je za rekonstrukciju neophodno uvođenje novih razmenjivača toplote, što povećava kapitalne troškove same mreže ali ukupni troškovi, koji obuhvataju kapitalne i energetske troškove, su smanjeni za oko 30 %.