EXPERIMENTAL STUDY ON IGNITION BEHAVIOR OF SUPERFINE PULVERIZED COAL AND AIR MIXTURE FLOW

Refiring of superfine pulverized coal is a newly developed low NO_x combustion mode, compared with combustion mode of pulverized coal with normal particle size, the new mode has many advantages as in the following: good results of stable combustion; high efficiency of combustion; high ratio of burnout; and high comprehensive economic performance etc.. Through tests, the ignition behavior of superfine pulverized coal and air mixture has been studied. Results show that the combustion perfomance of fine and superfine pulverized coal has been remarlkably improved, the firing index obviously decreased, and the reduction ratio of NO_x being enhanced to some extent.