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The manufacturing technique of helical surfaces is one of important tasks in developing single screw hydraulic machines. Using vector and matrix theory, a geometric relationship of contact points located at the contiguous curve between the spiral curved surface of workpiece and the disk-shaped milling-tool rotary camber, is analyzed thoroughly. The common point equation and the perpendicular equation...
To improve the safety of sewage recycle, The catalytic ozonation mechanism and oxidation kinetics of fulvic acid and nonylphenol ethoxylates (NPnEO) were studied using TiO2/AC /Iron as a catalyst of catalytic oxidation. The results show that: compared with the ozone oxidation alone, the removal of organisms in catalytic ozonation was higher, after the reaction 20min, the removal of COD in fulvic acid...
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