微波动态解吸参数对碱式硫酸铝再生的影响

Influence of Microwave Dynamic Desorption Parameters on Regeneration of Basic Aluminum Sulfate

碱式硫酸铝解吸法脱硫作为一种脱硫剂可再生并富产高纯SO_(2)的再生法脱硫技术受到了国内外广泛关注。为强化热解吸性能,在微波动态解吸系统下研究了微波功率、脱硫富液流量对解吸性能的影响。结果表明,微波持续作用下动态解吸系统运行稳定并显示出很好的解吸效果。脱硫富液在解吸瓶中可稳定维持在目标解吸温度,而在解吸液缓冲瓶中得到较低温度水平以排除热解吸的影响。在一定的脱硫富液流量和微波功率条件下,高微波功率和脱硫富液流量对解吸性能的促进作用明显,解吸终点解吸率达到72.26%和71.64%以上,解吸速率达到1.874 5×10^(-4) mol/(L·min)和2.443 5×10^(-4) mol/(L·min)以上。高微波功率下升温速率、解吸率、解吸速率有明显提升,微波解吸非热效应更为突出。高脱硫富液流量提高了循环倍率,使微波的有效作用时间延长,这对解吸率和解吸速率的提高有利。

Basic aluminum sulfate desorption desulfurization,as a renewable desulfurizer and rich in high-purity SO_(2),had attracted extensive attention at home and abroad.In order to enhance the desorption performance,the effects of microwave power and desulfurization rich liquid flow on desorption performance were studied under the microwave dynamic desorption system.The results show that the dynamic desorption system operated stably and has good desorption effect under the continuous action of microwave.The desulfurization rich liquid can be stably maintained at the target desorption temperature in the desorption bottle,while a lower temperature level can be obtained in the desorption buffer bottle to eliminate the influence of thermal desorption.Under certain desulfurization rich liquid flow and microwave power,high microwave power and desulfurization rich liquid flow could significantly promote the desorption performance.The desorption ratio at the desorption end point reaches more than 72.26%and 71.64%and the desorption rate reaches more than 1.8745×10^(-4) mol/(L·min)and 2.4435×10^(-4) mol/(L·min).Under high microwave power,the heating rate,desorption ratio,and desorption rate are significantly improved,and the non-thermal effect of microwave desorption is more prominent.High desulfurization rich liquid flow increases the circulation ratio and prolongs the effective action time of microwave,which is beneficial to the improvement of desorption ratio and desorption rate.