管道式微孔增氧装置的增氧性能研究

Study on oxygenation performance of pipeline microporous oxygenation device

为了评价不同进气量和进气压力对管道式微孔增氧装置增氧性能的影响,参照SC/T 6051—2011《溶氧装置性能试验方法》中的标准测试方法,在3个进气压力条件下开展不同进气量的室内清水增氧试验。结果显示:在相同进气量条件下,降低进气压力可取得较好的增氧性能;在相同进气压力条件下,装置的氧质量转移系数和增氧能力随着进气量增大而增大,氧利用率和动力效率则呈下降趋势,但在进气压力为0.2 MPa时,其氧利用率和动力效率下降幅度较缓。综合考虑增氧能力和运行能耗等因素,装置的进气参数可设置为进气压力0.2 MPa、进气量0.064~0.081m^(3)/h,在该条件下增氧能力达到29.79~34.36 g/h,氧利用率达到29.83%~32.32%,动力效率达到7.67~8.31 kg/(kW·h)。研究表明,进气量对装置的增氧性能有较大的影响,合理控制进气量对于提高增氧性能、降低增氧装置能耗具有重要意义。

To evaluate the influence of different intake air volumes and pressure on the oxygenation performance of the pipeline microporous aerator,the indoor clean water oxygenation test with different intake air volumes was carried out under three intake pressure conditions with reference to the standard test method in SC/T 6051-2011 Test method for the performance of oxygenator.The results show that under the condition of the same intake volume,reducing the intake pressure can achieve better oxygenation performance,under the same intake pressure condition,the oxygen mass transfer coefficient and oxygenation capacity of the device increase with the increase of air inlet volume,and the oxygen utilization rate and power efficiency show a downward trend.However,when the air inlet pressure is 0.2 MPa,the oxygen utilization rate and power efficiency decrease slowly.Considering the factors such as oxygenation capacity and operating energy consumption,the air inlet parameters of the device can be set as the air inlet pressure of 0.2 MPa,and the air inlet volume of 0.064 m^(3)/h-0.081 m^(3)/h.Under this condition,the oxygen increasing capacity reaches 29.79-34.36 g/h,the oxygen utilization rate reaches 29.83%-32.32%,and the power efficiency reaches 7.67 kg/(kW·h)-8.31 kg/(kW·h).The research shows that air intake has a great influence on the oxygenation performance of the device.Reasonable control of the air intake is of great significance to improving the oxygenation performance and reducing the energy consumption of the oxygenation device.