DESIGN AND OPTIMIZATION OF HEAT EXCHANGE NETWORK AND EXERGY ANALYSIS FOR METHANATION PROCESS OF COAL-GAS
DOI:
https://doi.org/10.52292/j.laar.2019.284Keywords:
Methanation, Heat exchange network, Exergy analysis, Pinch analysis, Heat energy diagramAbstract
It has the significant meaning to design an energy-efficient heat exchange network (HEN) for the methanation process in the coal-gas industry in China. In this work, HENs are set up to produce multiple saturated steams with different pressure levels by software design and manual retrofit methodology based on pinch analysis, and evaluated from the economic and exergetic viewpoints. The result shows that high pressure steam (312℃, 10Mpa, 13000kg/h) and medium pressure saturated steam (175℃, 0.9Mpa, 500kg/h) can be cogenerated by the optimal HEN with lower exergy loss and economic cost as well as higher exergy efficiency.
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