45-year-old boiler feed pumps replaced for cost of refurbishment

Published:  20 July, 2020

Power generation plants rely on boiler feed pumps to deliver a reliable and consistent flow of water to the boilers, which create the steam that powers the turbine, which creates electricity. After 45 years in service the boiler feed pumps needed to be replaced and Sulzer says it managed to achieve a return on investment of just over two years.

Reducing the amount of waste that goes into landfill is an important environmental consideration and one that is being supported by waste-to-energy plants, which use the material to create electricity. These plants help to increase sustainable energy production and they are supported by Sulzer, which offers many products and services that can improve efficiency and reliability.

A major UK waste-to-energy plant was experiencing considerable reliability issues with its six boiler feed pumps. Routine maintenance involved a complete refurbishment every two years and the costs for this work were increasing. Sulzer only became involved after one of its turbine specialists was discussing current issues with the maintenance manager.

Dale Jarvis, business development engineer with Sulzer, explained: “I had been working with this plant for some time, providing support for the steam turbine, and during one visit the discussion turned to the boiler feed pumps. Knowing that Sulzer has considerable expertise in boiler feed pumps, I invited one of my colleagues to visit the plant and see what we could offer.”

The plant has six boiler feed pumps that have been operating since the site was commissioned over 45 years ago. Over the years, the pumps have been regularly maintained, but more recently, they have required major refurbishments to keep them operational.

Having established the specifications of the old pumps, it was possible to source new pumps that would exactly match the original performance characteristics of the old pumps but with improved efficiency. Sulzer’s proposal was to replace two pumps each year, allowing the plant to spread the cost of the project and also appreciate the benefits of the new pumps before committing to the next stage of the installation. The financial benefits were obvious from the outset. The cost of each new pump was only marginally more than the refurbishment costs of the equipment it replaced, giving a return on investment of just over two years.

Sulzer has so far installed four of its MBN50 high pressure 9-stage pumps, which are primarily designed for power generation applications and provide efficient and reliable service in this demanding environment. The performance of each pump has been tailored to the application to ensure optimum efficiency and reliability.

For further information please visit: www.sulzer.com

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