(398f) Energy Saving Design Methodology of Preheating Section for Gas Membrane Separation Based On Self-Heat Recuperation
AIChE Annual Meeting
Wednesday, November 10, 2010 - 10:35am to 11:00am
In this research, a design methodology of a preheating section for gas membrane separation based on self-heat recuperation technology to reduce the energy consumption is developed. This design is consisted of the following three steps; 1) the heating load in the preheating section is evaluated, 2) the process is divided into the functions to balance the heating and cooling load, and 3) the process heat is recuperated and exchanged with the process self heat based on self-heat recuperation technology for providing an internal heat circulation to reduce the energy consumption.
In the process designed by the proposed methodology, the heat of the effluent streams from membrane separation unit is recuperated by compressors and exchanged with the heat of feed stream by using the self-heat recuperation technology. As a result, not only the latent heat but also the sensible heat of the process stream are circulated in the process and the process energy required can be drastically reduced, especially in the case that the phase change occurs during preheating section.
The simulation result demonstrates that the energy consumption of the process based on the proposed design methodology in an industrial application is less than 1/3 ofthat of the conventional counterpart.