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Design and optimization of a new tube aeration device
Aquaculture International ( IF 2.9 ) Pub Date : 2020-01-22 , DOI: 10.1007/s10499-020-00507-2
Chenglin Zhang , Benben Song , Jianjun Shan , Qi Ni , Fan Wu , Shiming Wang

With the intensification and industrialization of aquaculture, there is an urgent need for new high-performance aeration devices and energy-saving aeration technology to achieve oxygen saturation. Based on the oxygen transfer equation between air and water two-phase and the Venturi principle, a new tube aeration device was designed, developed, and tested in an attempt to solve these problems. The structural parameters affecting the aeration performance were identified and examined, and optimization experiments were undertaken to enhance the design of this aeration and oxygenation energy-saving technology. The key structural parameters were determined to be the air-water mixing distance, the height of the air hole under the water surface, the ratio of the entrance diameter to the throat diameter, the spiral mixing structure, and the air inlet size. These parameters, together with the airflow rate, influenced the aeration efficiency. Within certain limits, the larger the ratio of the entrance to the throat, the larger the air inlet size was, the more adequate the airflow rate was, and the greater the height of the air hole under the water surface was, the greater the oxygenation efficiency was. However, the additional length and the addition of a spiral mixing structure increased the head loss, reduced the airflow rate, and reduced the aeration and oxygenation efficiency.



中文翻译:

新型管式曝气装置的设计和优化

随着水产养殖的集约化和工业化,迫切需要新的高性能曝气设备和节能曝气技术以实现氧饱和度。基于空气和水两相之间的氧气转移方程和文丘里原理,设计,开发和测试了一种新型的管式曝气设备,以解决这些问题。确定并检查了影响曝气性能的结构参数,并进行了优化实验,以增强该曝气和氧合节能技术的设计。确定关键的结构参数是空气-水混合距离,水表面下的气孔高度,入口直径与喉道直径之比,螺旋混合结构以及进气口尺寸。这些参数与气流速率一起影响了曝气效率。在一定范围内,入口与喉咙的比例越大,进气口的尺寸越大,气流速率就越合适,并且在水面下的气孔高度越大,氧合越大。效率了。然而,增加的长度和增加的螺旋混合结构增加了压头损失,降低了空气流速,并降低了曝气和充氧效率。氧合效率越高。然而,增加的长度和增加的螺旋混合结构增加了压头损失,降低了空气流速,并降低了曝气和充氧效率。氧合效率越高。然而,增加的长度和增加的螺旋混合结构增加了压头损失,降低了空气流速,并降低了曝气和充氧效率。

更新日期:2020-01-22
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