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Only few data exist for experimental studies on ignition and combustion of boron particles with initial oxide thickness. The oxidation, ignition and combustion characteristics including the onset temperatures, weight gain, apparent activation energy, emission spectra during combustion, and ignition delay time of crystalline boron powders with different initial oxide thickness (x0) were studied by...
This study developed a new model of low NOx combustion for the direct flow of pulverized coal, which enabled the relationships among gas temperature, oxygen concentration, time consumption, and distance to be investigated. A model of the ignition and combustion zone was discussed in detail. It was shown that the gas temperature and the oxygen concentration change with the distance. The proper position...
This study developed a new model for the low NOx ignition for the direct flow of pulverized coal, which enabled the influence of the primary air and internally recirculated flue gas (RFG) on NOx formation to be investigated. A model of the preignition zone was discussed in detail. Three new parameters, the Local Stoichiometric Ratio of Volatiles(LSRV), the Virtual Temperature of Ignition (VTI) and...
Induction-heating ignition burner for the pulverized coal fired boiler is introduced. Some experiments were conducted on an experimental set-up, which includes alternative current power system, induction-heating system, pulverized coal and air supplier system, and measurement system to study the ignition process of coal powder and air mixture stream. Some results are presented. An industrial induction-heating...
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