ENGINE & TURBINE TECHNOLOGY
carry out the switch-over would be kept to a minimum. Using the measurements taken during the initial investigation, the Sulzer team engineered a fully customised pump with the hydraulic design based on its MD series. Te aim was to deliver the same performance with improved efficiency, which was achieved through the optimised design. In addition to the plug-and-play boiler feed pump, Sulzer also supplied automatic recirculation (ARC) valves, drive couplings, seals and some additional lube oil pipework. Te turn-key project saw Sulzer deliver all of the design and manufacturing aspects as well as supplying the ancillaries and civil works, ensuring peace of mind for the customer and enabling the plant engineers to focus on their core operations.
TWO-WEEK TURNAROUND Once the shutdown was in place, Sulzer’s field service team started the process of removing the original pumps and installing the replacements. Te drop- in design enabled this process and the commissioning to be completed in just
two weeks, to the great satisfaction of the plant’s operations team.
Although some additional lubrication piping was required, the remainder of the surrounding infrastructure was unchanged. Tis was in contrast to the proposal from the OEM that would have required considerable changes to the base plate as well as the suction and discharge pipework. In terms of investment, Sulzer’s solution was 50% of the amount required for a new pump replacement from the OEM. Sulzer’s turnkey solution also included a training package for the operations and maintenance teams that involved both hands-on and theoretical learning that would help maintain optimum performance for the new pumps. However, of greater importance to the power plant was the timeframe in which the project was completed. Achieving the project delivery within the shutdown period was of crucial commercial importance.
RELIABILITY FOR THE FUTURE Te custom pumps from Sulzer have been in operation for two years and
periodic vibration measurements have consistently returned values of just 2mm/s – well within the acceptable range and a considerable improvement on the original pumps. Furthermore, the efficiency of the pumps has been greatly improved, thanks to the modern hydraulic design and precision manufacturing. Te new boiler feed pumps have
ensured uninterrupted operational continuity for the power plant and allowed the maintenance team to focus efforts on other areas in need of optimisation.
New pumps installed and commissioned
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