摘要
耦合太阳光催化氧化和有机膜分离技术,设计了一种新型太阳光催化氧化-膜分离三相流化床反应装置(简称反应装置),并对平均粒径0.22μm颗粒状TiO2催化剂在反应装置中的悬浮性能进行了研究。结果表明:增加TiO2投加量和光催化反应区曝气量均使TiO2悬浮浓度升高、直至最大平衡悬浮浓度,同时TiO2沉积现象亦随之变得严重,最佳曝气量和TiO2投加量分别为0.30 m3·h-1和10.00 g。气冲洗使反应装置中TiO2悬浮浓度保持恒定,且适宜的气冲洗时间和气冲洗时间间隔分别为10 s和40 min。连通管上的阀门全开时膜分离器中TiO2悬浮浓度始终大于半开时的,而气冲洗前管式反应器中TiO2悬浮浓度在阀门全开时小于半开时的;膜出水对TiO2悬浮性能的影响很小。
Coupling with the technology of solar photocatalysis and organic membrane separation, a new type of three-phase fluidized bed reactor of solar photocatalysis-organic membrane separation was designed; and the TiO2 suspension performance in the reactor, which the average diameter is 0.22 μm, were investigated. The results show that TiO2 suspension concentration increase with the TiO2 dosage and aeration flux of the photocatalysis area until its maximum equilibrium suspension concentration, but TiO2 deposits phenomenon becomes serious at the same time. The optimal values of the aeration flux and TiO2 dosage are 0.30 m^3.h^-1 and 10.00 g respectively. Air rinsing in recycle pipe makes TiO2 suspension concentration invariable and the best time and intervals of the air rinsing are 10 s and 40 min respectively. TiO2 suspension concentration in the membrane separation reactor is always higher when the connection pipe valve is full open compared with half open. However, the concentration in the lube reactor before air rising is lower under the condition of full open. TiO2 suspension performance is hardly influenced by the membrane effluent.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2014年第4期764-770,共7页
Journal of Chemical Engineering of Chinese Universities
基金
天津市应用基础及前沿技术研究计划重点项目(11JCZDJC24900)
中空纤维膜材料与膜过程省部共建国家重点实验室培育基地开放基金(201022)
关键词
太阳光催化氧化
膜分离
悬浮浓度
反应装置
solar photocatalytic oxidation
membrane separation
suspension concentration
reactor
