The gangue filter media was modified by the titanium dioxide (TiO 2 ) through the liquid phase deposition method. Some influence factors of photocatalytic activity were investigated, including the mole ratio of initial solution, the water bath temperature, the deposition time, the calcination temperature and the heat preservation time of calcination. The morphology of the film was examined by SEM, EDS and crystallite structure by X-Ray Diffraction (XRD). The SEM, EDS and XRD data showed that new TiO 2 crystal was found in the modified filter media. And the specific surface area of the modified filter media greatly increased. By the orthogonal experiment, the optimum parameters of modification were (NH 4 ) 2 TiF 6 :H 3 BO 3 = 1:2, water bath temperature of 80 °C, deposition time of 5 h, calcination temperature of 500 °C, and 1 h heat preservation time of calcination. Under above conditions, the heavy nitrogen wastewater of 1589.94 mg/L COD and 18750 times chroma was treated by the modified filter media. After 1 h catalytic reaction, the decolorization rate and COD removal rate reached 65.89 and 47.87%, respectively.
This paper studied the efficiency of the oilfield water injection system by using the water injection system theory, fluid mechanics theory, and graph theory and optimization design technology. According to the actual conditions, the paper established the mathematical model of Wuliwan oilfield pipe network. Based on the actual data of production, energy distribution of oilfield water injection system was analyzed. Making the unit energy consumption of water injection lowest as the goal, solves through this mathematical model obtain the optimized pumping plan, thus the reasonably distribution of flooding energy, the enhancement pipe network system efficiency, reduces the system energy consumption. It supplies one scientific support for the Wuliwan oilfield to improve the level of flooding system management.
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