Experimental study of the particle deposition characteristics in an entrained flow gasifier

•Particle deposition characteristics are studied based on a hot model gasifier.•Advanced visualization techniques are applied in this study.•Particle deposition characteristics are classified into four different types.•Statistical results of deposition characteristics are obtained for the first time.

With the development and operation of the bench-scale opposed multi-burner gasification system and the application of advanced visualization techniques, the particle deposition characteristics in a gasifier has been studied. The particle deposition characteristics are mainly divided into four different types: particles impact and adhere, particles impact and rebound, particles detach after adherence, and particles impact and break up. The high-temperature and low-temperature particle deposition characteristics are discussed separately. The probability of low-temperature particle impact and adhere (39.50%) is approximately the same as that of impact and rebound (45.50%), and the proportion of adhered particles detach from refractory wall is 12.50%. The probability of high-temperature impact and adhere is 75.70%, which is much higher than that of impact and rebound (21.10%), whereas only 0.80% of high-temperature particles detach after adherence. The proportion of particle break up is almost the same for both high- and low-temperature particles, with a percentage of ~2.50%.