Combustion Characteristics and NO x Emission through a Swirling Burner with Adjustable Flaring Angle

Yafei Zhang, Rui Luo, Yihua Dou and Qulan Zhou
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Yafei Zhang: Mechanical Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Rui Luo: Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710032, China
Yihua Dou: Mechanical Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Qulan Zhou: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Energies, 2018, vol. 11, issue 8, 1-14

Abstract: A swirling burner with a variable inner secondary air (ISA) flaring angle β is proposed and a laboratory scale opposed-firing furnace is built. Temperature distribution and NO x emission are designedly measured. The combustion characteristics affected by variable β are experimentally evaluated from ignition and burnout data. Meanwhile, NO x reduction by the variable β is analyzed through emissions measurements. Different inner/outer primary coal-air concentration ratios γ , thermal loads and coal types are considered in this study. Results indicate that β variation provides a new approach to promote ignition and burnout, as well as NO x emission reduction under conditions of fuel rich/lean combustion and load variation. The recommended β of a swirling burner under different conditions is not always constant. The optimal β opt of the swirling burner under all conditions for different burning performance are summarized in the form of curves, which could provide reference for exquisite combustion adjustment.

Keywords: swirling burner; flaring angle; fuel rich/lean combustion; low load; combustion adjustment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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