STUDY OF HEAVY METALS CONDENSATION BY CONSIDERING VARIANT CONDITIONS OF INCINERATOR COOLING ZONE
The adhesion of heavy metals as they flow to the cooling surface of FBC (fluidized bed combustor) has been investigated under laboratory conditions. Model wastes spiked with mixture of Pb, Zn and Cu were used. The vaporizing ratio of these metals was kept as constant by fixing the reaction gas composition under 1223 K. Then the condensation behavior of these heavy metals was investigated by varying the tail gas composition and operational parameters such as Cl/S ratio and quenching rate. The results indicate that Cl/S ratio remarkably influence the partition and chemistry of the heavy metals. Increasing H2O concentration in the tail gas makes heavy metals condense in the form of sulfate instead of chloride at relatively low temperature section (573 K). In addition, quenching rate of tail gas also plays an important role on the redistribution of heavy metals between sulfate and chloride. The unavailability of equilibrium calculation for the quenching mode and some differences between the experimental and calculation results imply the complexity of the adhesion process of heavy metals.
heavy metals fluidized bed combustor chlorine incineration quenching rate
Yi Cheng Atsushi Sato Yoshihiko Ninomiya
Department of Applied Chemistry, Chubu University, Kasugai, Aichi 487-8501,Japan
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
434-440
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）