Pollutant emission characteristics of tobacco curing system in multi-fuel premixed combustion

被引：0

作者：

Wu Z. ^{[1
]}

Hua Y. ^{[1
]}

Duan L. ^{[1
]}

机构：

[1] School of Energy and Environment, Southeast University, Nanjing

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 03期

关键词：

Emission characteristics; NO[!sub]x[!/sub; Numerical simulation; Tobacco curing system;

D O I：

10.3969/j.issn.1001-0505.2022.03.004

中图分类号：

学科分类号：

摘要：

For an in-depth grasp of the emission characteristics of multi-fuel premixed combustion and deal with the energy shortage, a tobacco curing system in the multi-fuel premixed combustion was designed. Combustion pollutant emissions were studied by a computational fluid dynamics(CFD) method. The extended methane three-step reaction mechanism and the eddy dissipation conceptual (EDC) model were used to ensure the accuracy of CFD, and the probability density function (PDF) of temperature and composition fluctuations was used to study the NOx emission characteristics under turbulent flow conditions. The effects of the fuel ratio and the combustion temperature on CO and NOx emissions were analyzed. The results show that with the increase of H2 content in the fuel, the combustion temperature rises, a large amount of thermal NOx remain in the high temperature area, and the NOx emission at the outlet increases. As the CO content in the fuel increases, the N2O-intermediate generation rate increases and the NOx emission at the outlet increases. In multi-fuel premixed combustion, thermal NO and fast NO account for 95.2% of NO emissions; when the volume fraction of hydrogen in the fuel is between 5% and 10%, increasing the content of hydrogen can reduce CO emissions. © 2022, Editorial Department of Journal of Southeast University. All right reserved.

引用

页码：446 / 454

页数：8

共 20 条

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