Study On Heat Exchange Network Of Atmospheric And Vacuum Distillation Unit

This article is based on a certain petrochemical company 3.5 million tons/year atmospheric and vacuum distillation unit of process planning and design of the data, collecting and distributing control system(DCS) of calibration report and operation data acquisition device, the use of Aspen software for simulating process flow and heat exchange network design optimization, optimization of heat exchange network in order to realize the global energy in chemical process optimization.Flow chart of the early stage of the modeling, the drawing principle, proper adjustment of the actual process, the full process simulation with Aspen plus software. Then, to extract the heat flow of process flows and utilities stocks, using Aspen Energy Analyzer using pinch technology to its heat exchange network is optimized.Heat exchange network optimization in this paper, first the device operating conditions are optimized, including the decompression tower pressure optimization scheme optimization, reduction of vacuum system, heat exchanger type selection optimization; Then heat-exchange network optimization design input conditions are reasonable extraction in the process simulation software, through the analysis of the pinch analysis, many utilities to optimize and determine the limit of heat transfer heat exchange network conditions, through the study of the condition of multiple heat exchange network solution problem diagnosis, using comparative analysis and the engineering practice, got this device, the optimal heat exchanger network.