Fe_2O_3和K_2CO_3对钙基添加剂脱硫脱硝的影响

Effects of Fe_2O_3 and K_2CO_3 on Desulfurization and Denitrification by Calcium-Based Additives

在研究焦炭燃烧过程中使用钙基添加剂固硫的基础上,探讨了Fe_2O_3或K_2CO_3对CaO脱硫脱硝的影响。实验结果表明:添加剂的种类对焦炭燃烧过程中排放的SO_2和NO的浓度及总量均有一定的影响;加入Fe_2O_3或K_2CO_3替代部分CaO后,焦炭燃烧过程中排放的SO_2和NO比单独加入CaO时均有所下降;向焦炭中分别混合3.0%(w)CaO),1.5%(w)CaO+1.5%(w)Fe_2O_3,1.5%(w)CaO+1.5%(w)K_2CO_3的添加剂时,焦炭的SO_2排放总量分别降低了69.93%,75.98%,79.98%,NO排放总量分别降低了64.38%,79.73%,84.14%;加入Fe_2O_3或K_2CO_3后,钙基添加剂的表面性质发生了变化,同时增加了反应的活性中心数,因而复合添加剂能更有效地进行脱硫脱硝。

Based on researches of sulfur fixation with calcium-based additives in coke combustion process, the effects of Fe2O3 and K2CO3 on desulfurization and denitrification by CaO were investigated. The experimental results show that： The concentration and total amount of SO2 and NO emitted in coke combustion process can be affected by the type of additives; After CaO is partly replaced with Fe2O3 and K2CO3, SO2 and NO emitted in coke combustion process is declined than that by only CaO; When the coke is mixed with the additives of 3% （w） CaO, 1.5% （w） CaO＋1.5% （w） Fe203, 1.5% （w） CaO＋1.5% （w） K2CO3, the total emission amount of SO2 is reduced by 69.93%, 75.98%, 79.98%, and that of NO is decreased by 64.38%, 79.73%, 84.14%, respectively; With the addition of Fe203 or K2CO3, the surface properties of calcium-based additive are changed and the number of active center is increased, therefore the complex additive can improve desulfurization and denitrification effectively.