为了解决煤中痕量卤素-溴的燃烧产物排放造成的污染,通过固定床管式炉煤燃烧试验,研究了燃煤过程中添加钙基质(CaO)作为固溴剂对溴化物析出的影响。结果表明:钙基质(CaO)能够有效地降低燃煤过程中溴化物的排放量;采用预混与喷射相结合的方式向锅炉中添加固溴剂能够最大限度的吸收燃煤过程中析出的溴化物,减少溴化物的排放量。此外,钙基固溴剂的脱溴效率还受燃烧温度、停留时间、钙基固溴剂(CaO)的添加量、燃烧气氛等因素的影响,燃煤过程中控制合理的钙基质与溴化物的反应条件有利于提高钙基质的脱溴效率。
In order to solve emissions pollution problem of the trace halogen-bromine in coal combustion product,through fixed bed tube furnace coal combustion experiment,studied the impact on the precipitation of bromide while adding calcium matrix( CaO) as a solid bromide in the process of coal combustion.Results indicate that calcium substrate( CaO) can effectively reduce the amount of bromide,and it can absorb bromide to the maximum and reduce the emissions of bromide while the combination of pre-mixing and injection is used to add the strengthened bromide to the boiler in the process of coal combustion.In addition,the debromination efficiency of calcium bromide fixing agent is influenced by combustion temperature,retention time,quantity of calcium base solid bromide( CaO),and combustion atmosphere.The influence of such factors as the reasonable control of calcium in the process of coal matrix and the reaction conditions of bromide is helpful to improve the efficiency of calcium matrix debromination.