INLINE pH MEASUREMENTS AND INSTALLTATION TECHNIQUES FOR INDUSTRIAL SCRUBBERS

摘要

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