摘要
根据曝气过程中氧转移的有关理论,推导出需气量的表达式;并通过曝气过程中能量消耗的分析,导出动力消耗的表达式.通过计算分析得出,在一定的条件下,曝气器有最优孔径.一般水深在4 m左右,曝气器的最优孔径最小.一定孔径的曝气器,存在最佳安装水深,最佳安装水深随曝气器孔径的增大而增长.水深较小时,宜选用孔径较小的曝气器;水深较大时,宜选用孔径较大的曝气器.一般情况下,采用浅水曝气是不利的.
The equation of air demand was derived from the theory of oxygen transfer in aeration. By analysis of power consumption, the equation of power consumption was obtained. There exists the optimum aperture of aeration under some circumstance. The optimum aperture of an aerator is smallest at the water depth of 4 m. A given aperture has a correspondingly optimum water depth. The optimum water depth increases as the aperture of the aerator increases. Aerator with smaller apertures should be selected when water depth is low, and aerators with bigger apertures should be selected when water depth is high. Generally. shallow water aeration is not of high efficiency.
基金
安徽省"十五"科技攻关项目(01013024)资助
关键词
曝气器
最优孔径
动力消耗
氧转移效率
最佳水深
aerator
optimum aperture
power assumption
oxygen transfer efficiency
optimum water depth
