基于小型化二氧化碳传感器校准装置的高效控制条件研究  

Research on Control Conditions of Efficient Calibration of Seawater Carbon Dioxide Sensor Based on Water-Gas Exchange

作　　者：沈小涵 郑旻辉 魏进燕 王奎[3] SHEN Xiaohan;ZHENG Minhui;WEI Jinyan;WANG Kui(Key Laboratory of Marine Ecosystem Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;Zhejiang Province Key Laboratory of Offshore Engineering Environment and Ecological Safety,Hangzhou 310012,China;College of Oceanography,Zhejiang University,Zhoushan 316021,China)

机构地区：[1]自然资源部第二海洋研究所自然资源部海洋生态系统动力学重点实验室,浙江杭州310012 [2]浙江省近海海洋工程环境与生态安全重点实验室,浙江杭州310012 [3]浙江大学海洋学院,浙江舟山316021

出　　处：《海洋技术学报》2025年第1期1-10,共10页Journal of Ocean Technology

基　　金：浙江省“尖兵”研发攻关计划项目(2024C03035,2022C03044)。

摘　　要：针对当前海水二氧化碳传感器校准方法存在装置体积庞大、校准效率低下等不足,基于水气交换思路自主设计了小型化校准控制装置,对比分析了校准介质、水气交换方式、水气体积比例等因素对校准调节效率和校准环境维持的影响,并探讨了使用氮气进行可预测调节的可行性。结果表明:天然海水因无法达到平衡状态而不适合作为校准介质,自来水、超纯水和人工海水在数据波动情况、达到稳定耗时和最终平衡浓度方面无明显区别,皆可作为校准介质;喷淋和复水方式均可大幅提高水气混合效率,鼓气、喷淋、复水三者共用时的水气混合效率最高;通过减小校准器内水体体积或气体体积,以及在总体积一定时降低水体占比,均可提升水气混合效率;使用氮气基于时长及流速调控进行可预测的水体混合调节具备可行性。本文明确了各参数设置差异对于校准效率和校准环境维持的影响,验证了氮气调控的可预测性,为后续建立完整、高效、自动化的海水二氧化碳传感器校准方案提供了数据支持。In view of the shortcomings of the current calibration method of seawater carbon dioxide sensor,such as the large size of the device and the low calibration efficiency,a miniaturized calibration control device is independently designed based on the idea of water-gas exchange.The influence of the calibration medium,the water-gas exchange method,the water-gas volume ratio and other factors on the calibration adjustment efficiency and the maintenance of the calibration environment is compared and analyzed,and the influence of the calibration adjustment efficiency and the maintenance of the calibration environment is discussed.The feasibility of using nitrogen gas for predictable adjustment is discussed.The results show that natural seawater is not suitable as a calibration medium because it cannot reach an equilibrium state,tap water,ultrapure water and artificial seawater have no obvious differences in data fluctuations,the time it takes to achieve stability and the final equilibrium concentration,they can all be used as calibration medium.Spraying and rehydration methods can greatly improve the efficiency of water-vapor mixing,the water-vapor mixing efficiency is the highest when the three are shared:bulging,spraying and rehydration,by reducing the volume of water or gas in the calibrator and reducing the proportion of water at a certain time in the total volume,the water-vapor mixing efficiency can be improved.It is feasible to use nitrogen for predictable water mixing based on time and flow rate regulation.The paper clarifies the impact of the differences in the setting of various parameters on the calibration efficiency and the maintenance of the calibration environment,verifies the predictability of nitrogen regulation,and provides data support for the subsequent establishment of a complete,efficient and automated calibration scheme for seawater carbon dioxide sensors.

关 键 词：二氧化碳传感器 水气交换 校准控制条件 校准效率 

分 类 号：X853[环境科学与工程—环境工程]