微孔曝气增氧机的增氧能力试验

为探究微孔曝气增氧机对氧气的传递效果,从研究增氧能力出发,依据SC/T6009-1999增氧机增氧能力试验方法的标准检测程序,以直径为10m的标准室内水池作为试验平台,试验水温为20℃、气压为101.325kPa、初始溶氧浓度为0mg/L;试验用水为清水,将微孔曝气增氧机与射流式增氧机进行对比试验研究。研究结果表明,微孔曝气增氧机能有效增加水体底部溶解氧,与1.5kW射流式增氧机相比,射流式增氧机的增氧能力平均值为2.4kg/h,微孔曝气增氧机布管长度为20m时,增氧能力平均值为0.25kg/h,布管长度为42m时,增氧能力平均值为0.40kg/h,布管长度为98m时,增氧能力平均值为1.12kg/h,布管长度为200m时,增氧能力平均值为1.55kg/h,所以在目前试验布管密度条件下,增氧能力可以超过射流式增氧机。在进气口压力相同的情况下,微孔曝气增氧机增氧速度随着布管长度增加而增加。

The oxygen-enriched capacity experiment of micropore aerator

In order to investigate the actual oxygen transfer effect of micropore aerator,a comparative experimental study on micropore aerator and aerator was carded out for their aeration ability utilizing the laboratory 10 m diameter standard tank containing clean water as a testing platform,at the water temperature 20℃,atmospheric pressure 101.325 kPa and the initial DO level 0 mg/L,and following the standard testing procedure--"SC/T 6009-1999,the test method of oxyen-enriched capacity for aerator". The result shows micropore aerator can efficiently increase the DO level at the bottom area of aquaculture waters. Compared with the 1.5Kw aerator with the average aerating capacity of 0.66 kg/h,the average aeration capacity of micropore aerator with 20 m laying pipe is 0.25 kg/h,0.40 kg/h for 42 m,1.12 kg/ h for 98 m,and 1.55 kg/h for 200 m. Its oxygen-enriching capacity can exceed jet aerator at the pipe laying density of our current experiment. In the case of the same air inlet pressure,the oxygen-enriching velocity of micropore aerator increases with the increasing of the pipe length.