Experimental study of particle evolution characteristics below the burner plane in an impinging entrained-flow gasifier

Based on the bench-scale opposed multi-burner (OMB) coal-water slurry (CWS) impinging entrainedflow gasifier and the visualization imaging systems, the evolution characteristics of particles below the burner plane of gasifier are studied. Image post-processing algorithms and statistical methods are used to analyze and discuss the particle velocity, particle size distribution and particle spatial distribution of the particle group, as well as the volatile flame area and shape of the single particle. The average velocity of particles in the impinging-flow zone is slightly greater than that in the recirculation-flow zone. Compared with the particles in the recirculation-flow zone, the SMD of particles and the particle concentration in the impinging-flow zone are smaller. As the particles move downward along the axial direction of the gasifier, the occurrence frequency of particles in the impinging-flow zone increases. (c) 2022 Elsevier Ltd. All rights reserved.

Automated summary

In this study, the evolution characteristics of particles below the burner plane of a bench-scale opposed multi-burner (OMB) coal-water slurry (CWS) impinging entrained-flow gasifier were investigated using visualization imaging systems. Image post-processing algorithms and statistical methods were used to analyze particle velocity, size distribution, spatial distribution, volatile flame area, and shape. The results showed that the velocity of particles in the impinging-flow zone was slightly greater than that in the recirculation-flow zone, and the particle size and concentration in the impinging-flow zone were smaller compared to those in the recirculation-flow zone. The occurrence frequency of particles in the impinging-flow zone increased as they moved downward along the axial direction of the gasifier.