Experimental study on semi-coke particle ignition characteristics

In order to design a combustion system that meets the semi-coke combustion characteristics,the energy utilization efficiency is further improved on the premise of ensuring the safety of the system.In this paper,a multi non-premixed flat-flame Hencken burner system combined with a vibrated de-agglomeration particle feeder was used to investigate the effect of ambience temperature and the oxygen fraction on the semi-char ignition characteristic time.The experimental results shows when the normalized signal strength of 0.1 is selected as the ignition point,the characteristic ignition time of the semi-coke is about 10 ms; Increasing the ambient temperature accelerates the chemical reaction rate of the semi-coke surface and shortens the ignition time,and ignition time at 1 800 K is less than 1 200 K for about 4 ms; the increase will also shorten the ignition time of the semi-coke.The ignition time at an oxygen concentration of 10% is reduced by about 2 ms from 20%; the size of the burner changes due to the change in the ignition characteristic time is about 0.15 meters.