印染污泥与煤在循环流化床上混烧实验
Experiments on co-combustion of dyeing sludge and coal in a circulating fluidized bed
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摘要: 印染污泥热值较低，直接燃烧较为困难，需要添加辅助燃料进行混燃。通过对印染污泥与煤在循环流化床中混烧实验研究，发现印染污泥着火特性较差，启动时需将炉温提升至800℃以上，加入的污泥才能进行燃烧；污泥与煤在循环流化床中可以实现充分燃烧，温度在800~900℃之间均匀稳定，燃烧效率超过95%；混烧工况下烟气SO2含量高，在炉内加石灰石后脱硫效果显著，可以实现达标排放。Abstract: Dyeing sludge with low heat value is difficult to combust directly，so auxiliary fuel is required. Experiments on co-combustion of dyeing sludge and coal were made in a circulating fluidized bed and it was shown that ignition characteristics of dyeing sludge was bad. At start-up stage， the dyeing sludge added could not combust until the furnace temperature was higher than 800℃. When the furnace temperature was kept in the range of 800～900℃stably，sludge and coal could burn completely and the combustion efficiency was greater than 95%. In the co-combustion without desulphurization condition，the SO2 content in flue gas was high. After limestone was added，SO2 emission decreased remarkably and the flue gas could meet emission standards.
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Key words:
- dyeing sludge /
- co-combustion /
- combustion efficiency /
- flue gas emissions
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