微也民陶瓷膜过滤的阻塞状况及再生方法

通过对平板陶恣膜为过滤介质的动态旋叶压滤机的微波实验，研究了阻塞系数Ｋ的影响；对陶瓷膜的再生效率进行了探讨，提出了有效的再生方法；显示了用瓷膜作为动态旋叶压滤机过滤介质的优越性。     

微孔陶瓷膜过滤(二)——清洁陶瓷膜的纯膜阻力与阻塞

利用毛细管模型推导出双层陶瓷膜纯膜阻力并经实验得出其中的参数；通过以陶瓷膜为过滤介质的功态旋叶压滤机中的微滤实验，研究了阻塞系数Ｋ的影响因素     

微孔陶瓷膜过滤(三)——陶瓷膜的使用寿命、再生方法、预敷操作及其与有机膜的对比

以平板陶瓷膜为过滤介质的动态旋叶压滤机进行微滤实验，对陶瓷膜的使用寿命、阻塞情况、再生效率、预敷效果等进行了探讨，提出了有效的再生方法，并与有机膜进行了对比实验，得到了对工程实际有指导意义的一些初步结论，显示了用陶瓷膜作为动态旋叶压滤机过滤介质的优越性。     

微孔陶瓷膜过滤

微孔陶瓷膜过滤＊天津大学许莉朱企新王淑娥鲁淑群前言膜分离是近期发展迅速的新型分离技术，已在处理气体或液态混合物分离、化工产品和生物制品的提纯、食品工业、废水再生、废气处理、湿法洽金和石油化工产品分离等方面崭露头角。用于膜分离的陶瓷膜与有机膜相比，具有...     

臭氧对陶瓷膜过滤特性的影响

为了提高陶瓷膜的通量和过滤效果,采用臭氧-陶瓷膜组合工艺对水厂源水进行试验,研究了臭氧对陶瓷膜通量和过滤效果的影响。试验发现:在源水中投加臭氧可使陶瓷膜通量有一定程度的增加,且膜孔径越大其增加幅度越明显。对于10 nm陶瓷膜,臭氧投加量为1 mg.L-1时通量最大,增加约25%～30%;对于100 nm陶瓷膜,臭氧投加量5 mg.L-1时通量最大,增加约40～55%。随着臭氧投加量的增大和运行时间的延长,10 nm和100 nm陶瓷膜的出水浊度基本不受影响,出水浊度均稳定,约0.07～0.10 NTU。投加臭氧对10 nm、100 nm陶瓷膜去除源水中UV254均有一定促进作用,10 nm陶瓷膜对UV254的去除率可增加约9%～18%,100 nm陶瓷膜对UV254的去除率可增加约3%～7%。     

陶瓷膜过滤技术的应用

简要叙述了GL陶瓷膜过滤的工艺流程、工作原理及应用效果。     

动态微孔膜过滤特性研究

以旋叶膜滤机作为过滤设备对光合细菌发酵液为过滤物料进行了动态微孔膜过滤特性的研究。将膜技术与动态过滤技术相结合是膜分离技术的一个热点,集二者各自的优点,对其进行研究和开发,既有理论意义,又有实用价值。在实验中研究了操作条件如转速、压力、浓度对微孔膜过滤速率的影响。过滤速率的衰减基本可分为2个阶段,即速率下降阶段和稳态过滤阶段。     

陶瓷膜过滤技术在煤制乙二醇工艺中的应用

介绍了陶瓷膜过滤技术在煤制乙二醇工艺中应用,通过试验和分析,采用微孔陶瓷膜过滤器较好的解决了煤制乙二醇过程中微细颗粒精密过滤技术难题,提升煤制乙二醇成品的品质。     

陶瓷膜过滤受污NHD脱碳液的改进工艺研究

通过添加配料对受污NHD脱碳液中固体杂质进行改性处理,然后采用陶瓷膜对添加配料后的受污NHD脱碳液进行净化处理,研究了配料种类、添加量及跨膜压差等因素对过滤性能的影响,确定了添加配料后陶瓷膜过滤受污NHD脱碳液的最佳操作条件.试验结果表明:在室温、操作压力为0.10MPa的条件下,选用配料a、其添加质量分数为0.2%时,对受污NHD脱碳液进行净化处理,处理后受污NHD脱碳液的固体杂质去除率可达94.5%,且NHD脱碳液的吸收性能未变.     

陶瓷膜微滤的影响因素及膜污染再生探讨

对无机陶瓷膜这种近年来广泛应用的新型膜分离技术的发展和现状进行了介绍。无机陶瓷膜较有机膜及一般分离技术具有无可比拟的优势,在环保,化工,医药,食品饮料等领域发挥着日益重要的作用。对各个因素影响机理进行了探讨。在膜过滤的过程中不可避免的发生膜污染,利用单一或复合清洗剂使被污染膜恢复膜通量。     

Novel low pressure drop and easy regeneration ceramic whisker membrane for submicron particulate matter filtration

Aiming to efficiently remove submicron particulate matter (PM), a low pressure drop ceramic whisker membrane was prepared via precursor solution dip coating followed by high temperature firing. Aluminum nitrate 9-Hydrate and boric acid were used as the precursors for the formation of aluminum borate. A highly porous film comprising interconnected single phase 9Al₂O₃·2B₂O₃ whiskers of high aspect ratio, was successfully formed on an alumina support. Flue gas filtration tests indicated that as-fabricated ceramic whisker membrane exhibited outstanding filtration performance. More than 95 % PM in 0.3–1 µm was removed by using the as-prepared ceramic whisker membrane, and the pressure drop after three rounds of back blow regeneration remained stably at approximate only 1.3 times of the air pressure drop. This work provided a feasible approach to the preparation of a novel ceramic membrane with low pressure drop, and a novel strategy for high efficiency removal of submicron PM.     

复杂混合液的动态膜滤装置及其膜滤速率研究

本文从阻力理论出发，分析了旋叶式动态膜滤装置在对复杂混合液膜滤过程中的各种膜滤阻力的形成，影响因素及其变化规律，通过对多种复杂混合液的膜滤实验总结，建立了适于描述复杂混合液膜滤速率的数学模型，为工业复杂混合液的分离纯化和浓缩提供了一条新的途径。     

陶瓷膜在染料及漂染废水处理中的应用

考察了以陶瓷膜为过滤介质的旋叶压滤机对絮凝后的废水进行处理的过滤速率及其影响因素,进行了动态过滤与终端过滤的比较,以及陶瓷膜与有机膜在废水处理效果上的对比研究。     

Experiment and calculation of filtration processes in an external-loop airlift ceramic membrane bioreactor

Air sparging is recognized as an effective way to increase permeate flux in membrane filtration processes. The application of air sparging with an external-loop airlift ceramic membrane bioreactor was studied at different gas flow rates, biomass concentrations and suction pressures. A 180% increase in permeate flux was obtained while filtering a 2 g/L activated sludge wastewater suspension with the airlift cross-flow operation for U_g=0.21 m/s. The mechanism of flux enhancement in the case of slug flow in tubular membrane was discussed. The region near the gas slug was divided into three different zones: falling film zone, wake zone and remaining liquid slug zone. Air sparging significantly lowered cake thickness and consequently cake resistances for the wake region and the falling film region. A novel model combining hydrodynamic of gas-liquid two-phase flow and cake resistance was developed to simulate the process. The model was validated with experimental data with an error of 8.3%.     

旋叶动态膜滤技术在酶制剂生产中菌-酶分离过程的应用研究

通过旋叶式动态膜滤机装置的实验,利用核孔膜α 淀粉酶发酵液和２７０９碱性蛋白酶发酵液进行了菌 酶分离。实验结果表明,动态膜滤技术在酶制剂生产中直接用于酶发酵液除菌是可行的     

Electrically active and 3D porous TiO2-x ceramic scaffolds for bone tissue regeneration

Bone healing can be significantly improved by applying electrical stimuli in the injured region. Thus, electrically active scaffolds with 3D structure are of interest as bone graft substitute materials. Such materials can locally deliver electrical current to the cells in the bone defects and in the same time ensure space for new bone formation. Present study is focused on preparation of novel highly porous and electrically active TiO_2-x ceramic scaffolds via polymer replica method. Scaffolds showed fully open and interconnected pore structure with porosity above 95%. Thermal treatment of the scaffolds under high vacuum conditions was realized to obtain nonstoichiometric TiO_2-x scaffolds and as a result electrical conductivity significantly increased from ∼10⁻⁹ mS/m to ∼40 mS/m. In vitro studies confirmed that scaffolds are cytocompatible and enhances cell spreading. Thus, TiO_2-x scaffolds holds a potential to be used in bone tissue regeneration as an electrical stimuli supplier enhancing bone healing process.     

联箱式陶瓷滤管排的脉冲喷吹系统的研究

对共用一个喷嘴和引射器的联箱式陶瓷滤管排的喷吹性能进行了实验研究并得出结论,认为扩压管式引射器动态性能优于文氏管引射器和直管引射器,且喷嘴至引射器有一最佳距离     

我国无机陶瓷滤膜研究现状与应用前景

本文介绍了我国无机陶瓷滤膜的研究情况,并对陶瓷滤膜的分类和制备技术以及膜污染和防止作了简要描述;同时,对陶瓷膜分离技术在生产、生活中的应用状况,我国陶瓷滤膜的应用前景作了简要分析。     

Preparation and filtration testing of diatomite filtering layer by acid leaching

Ceramic membrane filter consisting of the filtration layer obtained from natural diatomite particles (finer than 50 μm) by coating onto a large porosity support made of quartz-based materials was fabricated. The coating was achieved by pressure filtration at 5 bar and later sintering applied at 600 °C. The sintered product was leached by the hot acid solution (5 M HCl; 75 °C) for 1 h. The characteristic skeletal structure of diatomite (fine microscopic pores) could be obtained without deforming the structural integrity of coating. Filtration response of the filter was tested in dead-end and periodic pressure filtration modes. The filtered particles were of calcite (finer than 1.5 μm) obtained from a marble factory wastewater stream. The diatomite leaching increased the filtration capacity of the filter media more than two times. The filtrate has high clarity (0.1 NTU turbidity). The coating maintained structural stability during a filtration process performed at 5 bar and backflushing of 4 bar.