煤粉炉喷钙脱硫过程的总体模型与模拟

A set of numerical models was proposed for modeling the furnace sorbent injection processes. The release of sulphur from coal/char as H2S was assumed in linear with burn rate and sulphur yields of char. The reaction of H2S with O2 was modeled by eddy-dissipation model. The heat-up and calcination of sorbent were assumed to instantaneous. A singlegrain model was used to model the sulphation and sintering of sorbent particle. These models were incorporated into a 3-D program for predicting the performance of the pulverized coal furnace. The predicted capturing rate of SO2 for a pilot scale furnace is about 30 percent at Ca/S of 2.5, which coincide with experimental results.