Acid conductivity monitoring at demineralization plant: an important performance parameter

摘要

The acid conductivity measurement is universally adopted for the monitoring of water-steam cycles as it can detect low level of contaminant on a continuous basis. This paper discusses the monitoring of acid conductivity at the inlet of the demineralization plant for assessing the output of the ion exchangers. An observation of data collected over a period of 14 months shows a strong correlation between output between regeneration (OBR) and acid conductivity. OBR is inversely proportional to acid conductivity with a correlation coefficient of -0.907. A drastic change in acid conductivity was observed when water level of the freshwater reservoir went below a depth of 3.8 m. The present study was undertaken with the intention to develop a simple and rugged method to measure the performance of ion exchangers in service and to find out the root cause of change in water quality after the freshwater reservoir level drops below a certain depth.