微波热处理再生颗粒状活性炭的研究

Study on regeneration of granular activated carbon by microwave thermal treatment

本文利用微波热处理法,分别在大气和氮气气氛两种情况下快速再生了已经充分吸附SO2的颗粒状活性炭.微波热处理过程中,应用红外热成像技术,采集了样品的一系列热图像,直观显示了温度分布,表明热处理的最高温度仅为300℃.将再生产物用于模拟烟气脱硫实验,结果表明大气气氛下,微波再生活性炭的脱硫性能还不及原炭的一半;换以氮气气氛隔绝空气后,其脱硫性能提升到原炭的97%.隔绝空气条件下的微波热处理再生法比传统热再生方法,降低了处理温度、极大缩短了再生时间,体现了高效、低能耗两大优势.

In this paper a typical commercial granular activated carbon which is fully SO2 adsorbed is re-generated by microwave heating under ambient atmosphere condition and nitrogen gas atmosphere condi-tion,respectively.A series of thermal images of the sample are captured during the microwave heating with infrared thermography technology.It showed temperature distribution visually and the highest temperature is only 300℃.The product is used to simulate flue gas desulfurization（FGD）experiments. The results indicated that the desulfurization performance of the product under ambient atmosphere con-dition is less than half of the virgin activated carbon.While isolated from the air using nitrogen gas flow,it rises to 97% of the virgin activated carbon.Compared to conventional thermal regeneration,mi-crowave thermal regeneration reduced the processing temperature and time.These revealed two signifi-cant advantages of the microwave thermal regeneration：high efficiency and low energy consuming.