细菌湿法烟气脱硫试验研究初探

EXPERIMENTAL RESEARCH IN FGD BY LIQUID BIOCHEMICAL WAYS

寻找有效、经济的烟气脱硫技术是减轻电厂SO2排放的关键所在。该文提出了一种利用微生物技术与过渡元素金属离子催化作用相结合的新型的烟气脱硫方法,并在呼和浩特电厂进行了中试试验研究。试验结果表明此法的脱硫效率可以达到80％左右。试验中摸索出了一些影响细菌湿法脱硫效率的关键因素,如吸收液中细菌的数量、吸收液pH值、气液比及吸收液含氧量等,为理论上进一步探讨细菌微生物法脱硫的机理和最终工业化应用打下基础。此外,技术经济性分析表明,由于该方法的成本消耗低,可望有良好的经济效益。

To find an economical and efficient FGD (flue gas desulfurization) technology is a key factor of decreasing the SO2 emission from power plants. This paper presents a new way of FGD that combines the microorganism technology and catalysis of transition metal ion. The pilot-scale experiment was conducted in Hohehot Power Plant. The results show that desulfurization efficiency of this way could reach above 80 percent. Some key factors affecting desulfurization efficiency were found, such as the quantity of bacteria, the pH value of absorbent, the ratio of liquid to gas and oxygen concentration in absorbent etc, which has laid a foundation for farther discussing the desulfurization mechanism of this way and future industrial trial in power stations. Moreover, the paper also simply introduced the economical performance of this FGD technology.