射流式泡沫分离器中气水比对水处理效率的影响  

Effect of gas-water ratio on the water treatmentefficiency in jet foam fractionators

作　　者：姜浩 柳瑶 宋协法[1] 李贤 董登攀[1] 黄志涛[1,3] JIANG Hao;LIU Yao;SONG Xiefa;LI Xian;DONG Dengpan;HUANG Zhitao(Fisheries College,Ocean university of China,Qingdao 266003,China;Marine College,Shandong University,Weihai 264209,China;Norwegian Institute for Water Research,Bergen 5006,Norway)

机构地区：[1]中国海洋大学水产学院,山东青岛266003 [2]山东大学海洋学院,山东威海264209 [3]挪威水研究所,挪威卑尔根5006

出　　处：《渔业现代化》2024年第4期73-81,共9页Fishery Modernization

基　　金：国家重点研发计划项目“水产养殖工厂养殖模型及智能管控平台研发(2022YFD2001701)”。

摘　　要：循环水养殖具有节能、节水、环保等优点,是国际先进的养殖模式代表之一。泡沫分离器作为循环水养殖系统的重要设备,其结构设计、操作管理对系统的净水效果有重要影响。目前泡沫分离器运行调节管理参数大多依靠经验,缺乏理论支撑。以应用较广的射流式泡沫分离器为研究对象,采用计算流体力学(CFD)方法,探究射流式泡沫分离器在不同气水比条件下(1∶2、1∶2.5、1∶3)泡沫的产生效率;采用实机试验探查不同气水比对悬浮颗粒物去除效率的影响。CFD结果显示气水比为1∶2.5时,泡沫分类器产生的气泡数量最多;实机试验结果显示,当气水比为1∶2、1∶2.5、1∶3时,泡沫分离器对固体颗粒的去除效率分别为35.23%±0.77%、44.85%±0.81%、44.52%±0.58%,其中气水比1∶2.5、1∶3的泡沫分离器相比于气水比1∶2的泡沫分离器固体颗粒去除率显著性提高。综上,射流式泡沫分离器气水比建议设定为1∶2.5,可获得较优颗粒物去除率及较好的出泡效果。本研究为优化泡沫分离器的运行参数提供了新的思路。Recirculating aquaculture,characterized by its energy and water efficiency and environmental friendliness,stands as one of the representative models of advanced aquaculture practices both domestically and internationally.As a crucial component of recirculating aquaculture systems,the foam fractionator significantly influences the system's water purification effectiveness through its structural design and operational management.Currently,the adjustment and management of operational parameters for foam fractionators primarily rely on empirical approaches,lacking theoretical support.This study focuses on widely applied jet-type foam fractionators and employs computational fluid dynamics (CFD) to investigate the foam generation efficiency under different gas-to-water ratios (1 ∶ 2,1 ∶ 2.5,1 ∶ 3).Furthermore,experimental trials explore the impact of different gas-to-water ratios on the removal efficiency of suspended particulate matter.The CFD results indicate that the foam classifier produces the highest number of bubbles when the gas-to-water ratio is set at 1 ∶ 2.5.The experimental results reveal that the foam fractionator's removal efficiency for solid particles at gas-to-water ratios of 1 ∶ 2,1 ∶ 2.5 and 1 ∶ 3 is 35.23%±0.77%,44.85%±0.81% and 44.52%±0.58%,respectively.The foam fractionators with gas-to-water ratios of 1 ∶ 2.5 and 1 ∶ 3 exhibit a significant improvement in solid particle removal compared to the foam fractionator with a gas-to-water ratio of 1 ∶ 2.Based on these findings,it is recommended to set the gas-to-water ratio for jet-type foam fractionators at 1 ∶ 2.5 to achieve optimal particle removal efficiency and substantial foam generation.This study provides novel insights for optimizing the operational parameters of foam fractionators.

关 键 词：射流式泡沫分离器 气水比 悬浮物去除率 数值模拟 

分 类 号：S969.38[农业科学—水产养殖]