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飞灰流化床燃烧脱碳的试验研究

DOI: 10.13334/j.0258-8013.pcsee.2014.26.002, PP. 4454-4461

Keywords: 循环流化床,飞灰,脱碳特性,燃烧

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Abstract:

飞灰回燃脱碳效率较低,导致回燃后飞灰仍不能满足综合利用的要求。文中基于飞灰的冷态流化特性,在自行设计的纯然飞灰的热态试验台上进行了燃烧脱碳试验。试验结果表明:CFB飞灰能够在流化床内连续稳定燃烧,维持炉内燃烧的最小截面热负荷约为0.4MW/m2,对应的临界飞灰含碳量为18%。密相区温度和运行床压对飞灰脱碳均有一定的影响。飞灰燃烧后在底渣的增重份额很小,最大不超过15%。试验系统的最大脱碳效率约为75%,远远高于飞灰回燃的脱碳效率。

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