INLINE pH MEASUREMENTS AND INSTALLATION TECHNIQUES FOR INDUSTRIAL SCRUBBERS

摘要

Proper operation of an industrial scrubber requires an accurate pH measurement in order for the scrubber to perform to specification. Inline pH electrodes are frequently the target of replacement due to improper readings and poor performance. Sensor installation, including orientation, depth, pipe velocity and other factors can significantly impact the accuracy of the reading, the life expectancy of the sensor and the maintenance requirements. This paper will explore optimization of these conditions giving the user a better understanding on how to improve scrubber performance. Sensor fouling or coating can be a concern; therefore, automatic in-place cleaning will be discussed. The use of digital sensors can provide diagnostic feedback on sensor wear, reference fouling and glass impedance to improve the accuracy and lifetime of the sensor. The use of both inline and off-line analyzers will be reviewed along with the sample conditioning challenges encountered.