The testing and performance analysis of 260t/h CFB boiler for co-combustion of crop stalk and coal

摘要

Experiment on co-combustion of crop stalk and coal is carried out in a 260t/h CFB boiler, and the performance of the CFB boiler is tested under 4 mixing ratios of crop stalk to coal, 0%, 10%, 20% and 30%. The results show that under the 4 mixing ratios, the CFB boiler could run safely and stably with 85% MCR and the boiler thermal efficiency is almost the same. With the increase of mixing ratio, the amount of ash entering the boiler decreases accordingly. In order to meet the need for furnace ash, boiler drains ratio shall be reduced accordingly. With the increase of mixing ratio, the CO content in flue gas at the furnace outlet increases sharply from 98 ∼ 310 ppm, and the flue gas temperature at furnace outlet also increases, while emissions of SO2 decrease apparently.