基于循环脱毒技术的高浓度消毒液在线监控系统

Real-time High Density Disinfectant Control System Based on Recurrence-detoxification

次氯酸克拉克电极在高浓度次氯酸的环境中容易中毒,失去检测稳定性,因此,该系统利用自来水进行间断性清洗,在电极深度中毒之前将次氯酸从电极电解液中清除,达到在检测过程中循环退毒的效果,从而维持测试的稳定性。实验显示,在300 ppm(1 ppm=10-6)的次氯酸环境中进行为期60 s的浓度测试,通过180 s的自来水退毒就可有效达到退毒要求。在电极稳定工作的基础上,基于系统硬件开发出相应算法,以弥补退毒过程采样频率过低而给消毒系统稳定所带来的影响。现场测试结果表明:该系统可以达到使用要求,维持消毒池次氯酸浓度在±5 ppm的范围区间。

Based on the reality that the Clark electrode is intended to be poisoned to lose test reliability in high density Hypochlorous acid circumstance,a recurrence detoxification method was used to detoxify the electrode in advance.In this system,tap water was used to clean the sensor electrode to remove Hyposchlorous acid from electrode electrolyte,which can meet measurement detoxification requirements and maintain measurement stability.Research showed that when the sensor electrode was used to test Hypochlorous acid at 300 ppm with 60 s,detoxification effects can be well maintained by tap water with time range of 180 s.Based on the system hardware platform with reliable Clark electrode,an algorithm was developed to compensate the potential unstable density control due to low signal sampling frequency.Online field tests show that the system can reach the requirements and maintain the Hypochlorous acid concentration at the range of ±5 ppm.