The invention relates to a device and a method for measuring the liquid film thickness and hydrodynamic behavior in a falling film microchannel by using a stereomicroscope. The device includes stereomicroscope, falling film microchannel, injection pump, peristaltic pump, cooling circulating pump, constant temperature tank and data acquisition and processing unit. The measurement method is as follows: Firstly, the blank falling film channel is scanned by stereomicroscope, and the two-dimensional cross-sectional coordinates of the channel are obtained, which are used as the baseline. Then the injection pump is used to feed the falling film system. When the liquid phase is stable, the falling film channel is sampled again by stereomicroscope. The result is compared with the baseline information collected for the first time. The apparent liquid film thickness can be obtained according to the difference of the sectional ordinates obtained twice. The falling film liquid substrate is used. The thickness of the liquid film in the falling film channel can be obtained by correcting the thickness of the membrane. At the same time, the device can also be used to observe the hydrodynamic behavior of liquid phase relative to microchannel wetting behavior and liquid flow pattern in microchannel. The measuring device and method have the advantages of easy installation, simple operation, non-contact measurement and high measuring accuracy.
【技术实现步骤摘要】
一种利用体视显微镜测量降膜微通道内液膜厚度及流体力学行为的装置及方法
本专利技术涉及测量降膜微通道内液膜厚度及流体力学行为的装置与方法,尤其涉及一种利用体视显微镜测量微通道内液膜厚度及流体力学行为的装置及方法。
技术介绍
降膜微反应器属气液微反应器范畴,是一种新型连续接触式气液传质设备,具有比表面积大、传递速率高、温度控制精确等优点,适用于强放热、快速反应。目前已成功应用于氟化、磺化、光催化、臭氧化等反应过程中[JaèhnischaK,BaernsaM,HesselbV,etal.Directfluorinationoftolueneusingelementalfluorineingas/liquidmicroreactors[J].JournalofFluorineChemistry,2000;105:117-28;MullerA,CominosV,HesselV,etal.Fluidicbussystemforchemicalprocessengineeringinthelaboratoryandforsmall-scaleproduction[J].ChemicalEngineeringJournal,2005;107(1-3):205-14;FabryDC,HoYA,ZapfR,etal.BluelightmediatedC–HarylationofheteroarenesusingTiO2asanimmobilizedphotocatalystinacontinuous-flowmicroreactor[J].GreenChem,2017;19( ...
【技术保护点】
1.一种利用体视显微镜测量降膜微通道内液膜厚度及流体力学行为的装置,其特征在于,包括体视显微镜(2)、降膜微反应器(3)、注射泵(4)、蠕动泵(6)、冷却循环泵(5)、恒温槽(7)和数据采集与处理器(1)等,其中体视显微镜(2)与数据采集与处理器(1)连接。
【技术特征摘要】
1.一种利用体视显微镜测量降膜微通道内液膜厚度及流体力学行为的装置,其特征在于,包括体视显微镜(2)、降膜微反应器(3)、注射泵(4)、蠕动泵(6)、冷却循环泵(5)、恒温槽(7)和数据采集与处理器(1)等,其中体视显微镜(2)与数据采集与处理器(1)连接。2.如权利要求1所述的测量装置,其特征在于,所述显微镜(2)为体视显微镜,显微镜的最大分辨率为0.1μm~20μm,最大放大倍率20×~2000×,光学变倍范围0.5×~40×。3.如权利要求1所述的测量装置,其特征在于,所述体视显微镜(2)传感器类型为CMOS或CCD,光源为LED光源或其他可照明光源。4.如权利要求1所述的测量装置,其特征在于,所述降膜微反应器(3)微通道宽0.1mm~10mm,深0.1mm~3mm。5.一种基于权利要求1所述降膜微通道内液相成膜厚度及流体力学行为测量方...
【专利技术属性】
技术研发人员:唐盛伟,杨永昌,张涛,王丹,
申请(专利权)人:四川大学,
类型:发明
国别省市:四川,51
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