Open AccessThe design of swirl burner in a pulverized coal gasifier by numerical analysis
Author(s) -
Qin Dachuan,
Bing Li,
Mingquan Wang,
Chao Yang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/733/1/012014
Subject(s) - pulverized coal fired boiler , wood gas generator , combustor , mechanics , coal , combustion , materials science , large eddy simulation , flow (mathematics) , waste management , chemistry , engineering , turbulence , physics , organic chemistry
In this paper, the eddy-dissipation-concept model is used to simulate the influence of burners of different structures on the performance of gasifier. The effects of the annular inner and outer passage, annular air passage and annular pulverized coal passage on the spatial distribution of flow field, temperature field and grouping field in gasifier were investigated. The simulation results show that pulverized coal can obtain higher carbon conversion rate by going through the annular outer passage of the burner. As the number of air swirl S increases, the high temperature flame in the gasifier becomes more dispersive and the temperature gradient becomes smaller. The high temperature flame zone in the gasifier is more diffuse when pulverized coal goes through the annular outer channel than the annular inner channel, which can reduce the temperature of the high-temperature flame zone.