Abstract: The pure oxygen oxygenation system with an oxygen cone as the gas-water mixing device has high oxygen dissolution efficiency, but it needs to generate a certain amount of pure oxygen and energy consumption. This paper uses relevant principles such as material balance to scientifically design the flow of pure oxygen gas into the oxygen cone and the flow of aquaculture water, analyze its operating costs, and discuss key design issues. The results show that: when the oxygen cone with a certain cone structure size is used, when the flow rate of pure oxygen gas is 14.6 L/min and the flow rate of aquaculture water is 1327.3 L/min (the water circulation volume of the aquaculture system is 79.6 m3/h), the oxygen can be 81.88%～89.07% utilized. The higher dissolved oxygen efficiency of the cone provides 1026.8-1116.9g/h of dissolved oxygen in the aquaculture system, which fully meets the dissolved oxygen demand of the recirculating aquaculture of Litopenaeus vannamei with a culture water body of 300 m3 and a culture density of 6kg/m3. The oxygen consumption of the oxygen cone is 1252.7 g/h and the power consumption is 2.9 kWh. This design provides support for improving the technical performance of the pure oxygen aeration system and promoting the wide application of pure oxygen aeration in high-density recirculating aquaculture.

Key words: recirculating aquaculture system, oxygen cone, operating parameters

摘要： 以氧锥为气水混合装置的纯氧增氧系统溶氧效率高，但需产生一定气耗及能耗。本研究运用物质平衡等相关原理，对通入氧锥纯氧气体流量、养殖水体流量进行科学设计，分析其运行成本，并讨论设计关键问题。结果显示：采用一定锥体结构尺寸氧锥，当通入其纯氧气体流量为14.6 L/min、养殖水体流量为1 327.3 L/min（养殖系统水循环量79.6 m3/h）时，能充分利用氧锥81.88%～89.07%高溶氧效率，提供1 026.8～1 116.9 g/h养殖系统需氧量，完全满足养殖水体300 m3、养殖密度6 kg/m3的凡纳滨对虾循环水养殖溶氧量需求。氧锥运行耗氧1 252.7 g/h，耗电2.9kWh。研究表明，本设计对提高纯氧增氧系统技术性能，推进纯氧增氧在高密度循环水养殖中广泛应用提供支持。

关键词: 循环水养殖系统, 氧锥, 运行参数