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中文摘要：
本文发展一种基于电感耦合等离子体（ICP）技术的烟气镉和锌的在线测量方法,连续测定煤燃烧烟气中镉和锌的瞬时浓度,从而全面跟踪镉和锌的挥发释放过程。实验得到优化的ICP（功率1400W）进气流速为：样品气体,0.03L/min;氩气,0.16 L/min。在线测量系统与流化床实验装置配备在一起,对煤燃烧烟气中镉和锌的浓度进行在线测量。温度对重金属的蒸发有很大影响,温度增加有利于其蒸发,但不是呈线性关系。重金属与飞灰颗粒在高温下反应生成稳定化合物,从而抑制了重金属的挥发。该技术对于研究燃烧过程重金属的释放和控制过程,是一种有用的工具。
英文摘要：
An inductively coupled plasma atomic emission spectrometer was developed to continuously analyze the concentrations of cadmium and zinc in order to track the metal release process during coal combustion.The optimum values of the gas flows for the 1400 W power generator are 0.03 L/min for the sample gas and 0.16 L/min for Ar.This system was implemented by coupling it to a fluidized bed reactor.Temperature significantly influences the metal vaporization process.The higher the temperature is,the higher the metal vaporization,although the vaporization is not proportional to temperature.The formation of stable compounds could decrease the metals vaporization.The on-line detection system is of significant value for understanding metal behavior in combustion and in pollution control devices.
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