煤粉炉喷钙脱硫过程的总体模型与模拟

MODELING AND SIMULATION OF IN FURNACE DE-SO_x PROCESS BY DRY SORBENT INJECTION

1前言我国燃煤中约有三分之一用于火力发电，减少火电厂SO。排放是治理酸雨和SO。污染的重中之重。炉内喷钙脱硫结合尾部增湿活化技术（LIFAC）因流程简单、投资省、运行费用低而且效率较高，特别适用于燃烧中、低硫煤锅炉的改造，是一种具有广泛应用前景的技术［1］本文?..

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.