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Ceramic membrane microfiltration process aluminum powder pigment industry generated 200 # containing impurities solvent oil, microfiltration process operating parameters affect the concentration behavior of membrane fouling mechanism and membrane flux recovery and industrial design, expanding the ceramic membrane microfiltration solvent oil. The membrane pore size 0.2, 0.5 and 0.8 m ceramic membrane containing impurities solvent oil microfiltration behavior. Ceramic membranes for membrane pore size 0.2, the choice does not add the water and the 0.5% (omega) two solid to liquid water, the time of the inspection operation, transmembrane pressure, cross-flow velocity, temperature, and Aluminum Content on membrane flux and rejection rate the results showed that: do not add water than add water feed liquid membrane flux increased significantly; operation time, the membrane flux gradually decreased to a stable, aluminum powder interception rate increases rapidly to 100%; transmembrane pressure increase large temperature increases are making steady flux increases; cross-flow velocity increases, the stable flux first increased and then stabilized; higher content of aluminum powder, the lower membrane flux. Suitable operating parameters for the transmembrane pressure 0.16 MPa, Cross-flow velocity of 3.9 m / s, temperature 40 ° C. Membrane pore size of 0.5 and 0.8 m ceramic membrane, similar conclusion ceramic membrane with the membrane pore size 0.2, optimal transmembrane pressure of 0.12 MPa and 0.10 MPa, respectively. Study of three ceramic membrane enrichment process, found that: With the increase of the concentration factor, the membrane flux decreased rapidly to a flat stage, followed by rapid reduce; aluminum powder interception rate increases rapidly to 100%, isostearic acid and sodium oleic acid retention rate increased slightly, the purified solvent oil is clear and transparent. Study on the mechanism of membrane fouling, contamination by electron microscopy and energy dispersive analysis the membrane results showed that: membrane fouling occurs mainly at the membrane surface, and the main component is aluminum powder and an organic substance. Explore the membrane fouling resistance, found that membrane fouling resistance (Rf) play a crucial role in flux decline. Pollution membrane chemical cleaning, 0.15% (omega) detergent solution and 0.25% (omega) nitric acid solution gradually cleaning, 0.2 ceramic membrane flux can revert to 94.9% of the new membrane flux; 0.15% (omega) detergent solution, 0.25% (omega) nitric acid solution, and 0.5% sodium hydroxide solution (ohms) 0.3% sodium hypochlorite solution (omega) sequentially cleaning the, 0.5 ceramic membrane flux can be restored to more than 97.8%. Recoil operation on the membrane flux, recoil can effectively improve the membrane flux and flux recover to more than 94% of the initial flux. Completely blocked correction model, and compared with other blocking model to fit the set of experimental data, it is found that the correlation coefficient of the correction model was above 0.99. Ceramic membrane purification solvent oil microfiltration process of industrial design, analyze its economic benefits, found: annual processing 1,000 tons of solvent oil, the membrane pore size of 0.2 ceramic membrane, the total membrane area of ??1.92 m2, to meet industrial requirements; design two strings and process, has a good economy.
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