Perspectives: Plant InSites

Correctly Contend with Control Valve Leakage

Carefully consider how to deal with low flow rates on level control

By Andrew Sloley, Contributing Editor
Mar 19, 2015

A wastewater plant needed to reduce its emissions of volatile organic compounds. Troubleshooting identified excess light hydrocarbons in the water as the culprit. The water came from a common wastewater collection header shared by two distillation columns. Samples from different points on the header isolated the possible problem source as being the overhead system of one of two towers. Both had the same configuration (Figure 1).

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