摘要：A new flue gas desulphurization (FGD) technology was developed to absorb SO2 by using citrate solution as absorbing agent, with hollow fiber membrane and ultrasonic *** treatment and membrane technology were introduced into the process of *** cavitation and its enhancement of the mass transfer process were *** using the self-designed reactor,the effects of ultrasonic treatment on the stability of citrate solution and hollow fiber membrane for FGD were *** results showed that under the condition of frequency 20 kHz, citrate concentration 0.5 mol·L-1 and pH 4.5, the absorption of sulfur dioxide from flue gas in the hollow fiber membrane module could be enhanced by ultrasonic treatment, but the solution could be heated up,which caused inhibition of *** the process of ultrasonic treatment,citrate solution and hollow fiber membrane remained stable.

摘要：采用中空纤维膜接触器对柠檬酸盐溶液吸收模拟烟气中SO2的行为进行了研究.考察了柠檬酸盐溶液浓度、溶液pH值对膜吸收效果的影响,对比了不同中空纤维膜材料的吸收效果,考察了吸收液中硫酸根的生成情况.研究结果表明:增大柠檬酸盐浓度有利于提高SO2的吸收速率和容量;吸收液pH值越高,吸收效果越好;疏水性中空纤维膜吸收效果优于亲水性膜;吸收液中硫酸根离子浓度随时间基本呈线性增加,增加的速率约为0.192 g/(L.h).

摘要：该文作者针对新冠病毒疫情期间其所在学校的网络在线教学授课门数、上课人数、开课率、到课率、教学平台和教学方式使用等情况进行了梳理、统计和分析,并对当前网络在线教学提出了几点思考,希望有助于网络在线教学质量的改进和提升。