低浓度VOCs气体漩涡燃烧分解过程的数值模拟研究

Numerical Simulation Study on the Decomposition Process of Low-concentration VOCs by Vortex Combustion

常规RTO设备治理VOCs废气需长期大量投入助燃天然气,显著提高了能耗和成本。利用数值模拟方法,从浓度提升和燃烧组织两个方面,评估了VOCs的氧化放热与高温分解过程,并组织优化了燃烧室内的流动与燃烧,提出了漩涡燃烧方法,配合VOCs浓缩技术,可以仅依靠被处理的VOCs自身的氧化放热,能量自维持地实现低浓度VOCs的高效分解,从而为VOCs治理中摆脱对助燃天然气的依赖奠定理论基础。

During the treatment of VOCs by RTO equipment,the demand of natural gas largely increased the energy consumption and cost.In the present work,numerical simulation was carried out to evaluate the heat release and VOCs de⁃composition in the oxidation reactions,and to study the effects of concentration increasement and combustion organization.Vortex combustion was proposed based on the study,and coupling with concentration technology,complete decomposition of VOCs could be realized only relied on its own exothermic oxidation.It would establish the theoretical foundation for the VOCs treatment to get rid of the dependence on natural gas.