Retrofit of the drive system for circulation pumps in chemical plants
Replace throttling control with variable frequency drive to adjust the pump operating point based on actual flow, while simultaneously evaluating bypass and protection configurations.
This article isExample, used to explain methods and processes; does not represent confirmed client partnerships or project outcomes.
This scenario involves a circulating water system for a chemical plant. The original design used valve throttling to regulate flow, causing the pump to operate long-term away from its optimal efficiency point. The retrofit objective is to replace the drive and control systems in stages without interrupting production.
Implementation begins with recording operational data and verifying load curves, followed by determining the inverter capacity and bypass configuration. During commissioning, verify performance in flow increments to confirm that pressure and flow meet process requirements after switching to variable-speed operation.
The key to this retrofit lies in the downtime window and bypass logic. We recommend defining switch steps, protection settings, and emergency response plans during the design phase to avoid disrupting the main workflow during commissioning.
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