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combustion mechanism development and cfd simulation for the prediction of soot emission during flaring

Frontiers of Chemical Science and Engineering 2016年第4期10卷 459-471页

作者： Anan Wang Helen H. Lou Daniel Chen Anfeng Yu Wenyi Dang Xianchang Li Christopher Martin Vijaya Damodara Ajit Patki Dan F. Smith Department of Chemical Engineering Lamar University Beaumont TX 77710 USA SINOPEC Safety Engineering Institute Qingdao 266000 China Department of Mechanical Engineering Lamar University Beaumont TX 77710 USA Department of Chemistry Lamar University Beaumont TX 77710 USA

Industrial Flares are important safety devices to bum off the unwanted gas during process startup, shutdown, or upset. However, flaring, especially the associated smoke, is a symbol of emissions from refineries, oil gas fields, and chemical processing plants. How to simultaneously achieve high combustion efficiency （CE） and low soot emission is an important issue. Soot emissions are influenced by many factors. Flare operators tend to over-steam or over-air to suppress smoke, which results in low CE. How to achieve optimal flare performance remains a question to the industry and the regulatory agencies. In this paper, regulations in the US regarding flaring were reviewed. In order to determine the optimal operating window for the flare, different combus- tion mechanisms related to soot emissions were summar- ized. A new combustion mechanism （Vsoot） for predicting soot emissions was developed and validated against experimental data. Computational fluid dynamic （cfd） models combined with Vsoot combustion mechanism were developed to simulate the flaring events. It was observed that simulation results agree well with experimental data.

关键词： flare soot emission combustion mechanism,cfd simulation

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