Engineering design and performance experiment of speece cone for the aquaculture vessel
Ensuring the appropriate dissolved oxygen concentration in the aquaculture water is crucial to the healthy growth of cultured fish.In order to meet the oxygen demand requirements for high-density aquaculture with super large water capacity of aquaculture vessel.According to the double membrane theory and Fick's law,as well as the testing standards for the oxygenation capacity of aerators,a speece cone size model was designed and its oxygen enhancement performance tests were conducted.The experiment results show that the dissolved oxygen concentration at the outlet of the speece cone reaches 40 mg/L,and the supersaturated dissolved oxygen is close to 400%,achieving ultra-high saturation dissolved oxygen.Under the conditions of an oxygen intake rate of 7.6 m3/h and an oxygen cone operating pressure of 0.07-0.25 MPa,the oxygenation capacity is not significantly affected by the operating pressure.However,the optimal intake rate range is significantly affected by the operating pressure.The higher the operating pressure,the less likely it is to form large bubbles on the water surface when the oxygen intake rate increases,thus maintaining a higher oxygen utilization rate.When the oxygen intake is greater than 6.5 m3/h and the operating pressure is between 0.07 MPa and 0.25 MPa,each aquaculture cabin is equipped with one speece cone of this structural size to meet the oxygen demand of the aquaculture cabin.The oxygenation capacity of this speece cone is significantly higher than other oxygenation devices,and its power efficiency is also higher than most oxygenation devices,which is suitable for oxygenation of aquaculture vessel.This study provides basic data for the engineering design and stable and efficient operation of the oxygen enrichment equipment of aquaculture vessel.
aquaculture vesselhigh density aquaculturespeece coneoxygen increasing abilityoperating pressure