Experimental Study on a Hot‐Oxygen Burner in a Bench‐Scale Gasifier

The direct-ignition technology of an entrained-flow coal-water slurry gasifier with hot-oxygen burner (HOB) is presented. Experimental tests were carried out using diesel oil and coal-water slurry in a bench-scale entrained-flow opposed multi-burner (OMB) gasifier. Using a CCD camera equipped with high-temperature endoscope, flame images inside the gasifier were recorded and subsequently processed. The results show that the HOB diesel flame is more stable than the normal two-channel burner flame typically used. Entrained-flow coal-water slurry gasifiers can start up using the HOB directly without a higher preheated wall temperature. An HOB can potentially save gasifier preheating time and operation costs and enables a wide range of future applications.

[1]  Qinghua Guo,et al.  Experimental investigations on temperature distributions of flame sections in a bench-scale opposed multi-burner gasifier , 2009 .

[2]  Yong Yan,et al.  Monitoring and characterisation of pulverised coal flames using digital imaging techniques , 2002 .

[3]  Takeshi Yokomori,et al.  Electrostatic probe measurement in an industrial furnace for high-temperature air conditions , 2007 .

[4]  Ryoichi Tanaka,et al.  The potential of visualization for studies on flames and furnaces , 1994 .

[5]  Wei‐Xing Zhou,et al.  Multifractal detrended fluctuation analysis of combustion flames in four-burner impinging entrained-flow gasifier , 2007, 0710.5214.

[6]  原田 道昭,et al.  2008 Gasification Technologies Conference , 2009 .

[7]  Qinfeng Liang,et al.  Impinging Flame Characteristics in an Opposed Multiburner Gasifier , 2013 .

[8]  C. Cheung,et al.  Heat transfer characteristics of an impinging inverse diffusion flame jet -Part I: Free flame structure , 2007 .

[9]  Kakeru Fujiwara,et al.  Experimental study on the unique stability mechanism via miniaturization of jet diffusion flames (microflame) by utilizing preheated air system , 2013 .

[10]  C. Shaddix.  Coal combustion, gasification, and beyond: Developing new technologies for a changing world , 2012 .

[11]  Qinfeng Liang,et al.  The investigations of temperature distributions in an opposed multi-burner gasifier , 2011 .

[12]  W. Blasiak,et al.  Effect of operating conditions on tar and gas composition in high temperature air/steam gasification (HTAG) of plastic containing waste , 2006 .

[13]  E. Lester,et al.  Characterisation of residual carbon from entrained-bed coal water slurry gasifiers , 2007 .

[14]  Gunnar Heskestad,et al.  Turbulent jet diffusion flames: consolidation of flame height data , 1999 .

[15]  Kunio Yoshikawa,et al.  High temperature air combustion boiler for low BTU gas , 1999 .

[16]  Franz Mayinger,et al.  Experimental Investigation of Supersonic Flame Stabilisation based on Fuel Self‐Ignition , 2000 .

[17]  Seik Park,et al.  Experimental investigations of the effect of coal type and coal burner with different oxygen supply angles on gasification characteristics , 2011 .

[18]  G. Nathan,et al.  The influence of geometric nozzle profile on the global properties of a turbulent diffusion flame , 2007 .

[19]  S. Takeda,et al.  A pre-heating vaporization technology of coal-water-slurry for the gasification process , 2007 .

[20]  C C Pian,et al.  Development of a high-temperature air-blown gasification system. , 2001, Bioresource technology.

[21]  Alan Williams,et al.  Combustion characteristics of lignite-water slurries , 1998 .

[22]  Qinghua Guo,et al.  Three-Dimensional Temperature Distribution of Impinging Flames in an Opposed Multiburner Gasifier , 2012 .