erfan ziarifar - M.Sc in chemical engineering
sorosh zarinabadi - science board member of islamic azaduinversity ahvaz branch
maryam hosseini - young researchers club islamic azad university of north tehran branch
amirhossein tarighaleslami - scientific board member of islamic azad university

In this article the optimum blow down stream of a heat exchanger that named E-2413 in stripping part in amirkabir petrochemical olfin plant by observing effictive variables in this process is gained and the we optimized it . This heat exchanger after a period of working needs to over haul or basic repairing cause of low operation efficiency . a large number of researchers had some work on this title of problems in some petrochemical plants and now we present a research including an appropriate anticipation of the required time for operation of this part of unit. finally a model in this relation will be offered so that amount of waste behavior of system or blow down will be anticipated. this article deals with waste water exchanger of amir kabir petrochemical Iran company stripping tower that is located in bandar imam special region and all information and data for medeling are available in this article. in this article some studies are performed between april 2009 to december 2009. obviously the error of this model is reasonable and acceptable.

heat exchanger , stripping tower, blow down