PRODUCTS & APPLICATIONS PUMPS, VALVES & ACTUATORS
AS CUNNING AS A FOX
PUMP REPLACEMENT ROI IN JUST TWO YEARS
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 six boiler feed pumps at a UK waste-to- energy plant needed to be replaced due to reliability issues, and Sulzer managed to achieve an impressive return on investment of just over two years. Dale Jarvis, business
Like its namesake, AUMA’s new PROFOX is not only cunning and adaptable, but also hardy. Aimed at applications requiring fast and precise positioning, flexibility and future- proof interfaces, the smart and compact PROFOX series is suitable for all industry sectors, including water treatment, and the process industries. Cunning: Built-in intelligence makes
PROFOX equally suited to both simple open-close duty and challenging modulating applications. Motor speed is adjustable, ensuring fast and precise positioning without overrun. Soft start and soft stop functionality increases valve lifetime. Operating costs are low, thanks to high mechanical efficiency and low standby consumption. Innovative diagnostics ensure long- term availability and future-proof PROFOX actuators for IIoT applications. Adaptable: AUMA PROFOX actuators
work with gate, butterfly, ball and globe valves. There are multi-turn versions for torques of 10 – 100Nm and part-turn versions delivering 32 – 600Nm. A linear actuator will follow soon. Host system integration is flexible; PROFOX actuators support the most common communication protocols and are prepared for future evolutions. Compact design allows PROFOX actuators to fit tight spaces. Hardy: High-quality metal housing
with IP67 protection (IP68 optional) and AUMA’s corrosion protection ensure that PROFOX actuators have a long life at temperatures from –30°C to +70°C. PROFOX actuators are simple and
easy to use. Installation and commissioning are fast using either the integral pushbuttons or an intuitive app. The FOX-EYE indicator light and a position indicator on the housing show the actuator status at any time, even from a distance.
AUMA Actuators
www.profox.auma.com
16 JUNE 2020 | PROCESS & CONTROL
development engineer with Sulzer, said: “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.” Sulzer’s turnkey solution
included the removal of the legacy equipment and the installation and commissioning of new pumps. 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. Jarvis said: “Our site services
team only needed ten days on site to remove the old pump, modify the pipework slightly and install the new equipment. This ensured that the plant always had sufficient capacity and no downtime was associated with the project. After the first two pumps
were installed, the plant manager decided to continue with the project and four pumps have now been replaced. The installation of the remaining two will take place next year. “The annual running costs have
dropped dramatically, and the maintenance team is now able to spend more time looking after other important equipment. The whole project has been completed on time without any disruption to the operation of the plant and is on target for completion next year,” Jarvis concluded.
Sulzer
www.sulzer.com
THE SHAPE OF THINGS TO COME IN WASTE TREATMENT
Landia aerators are playing an important role in the success of Yorwaste’s Harewood Whin Leachate Treatment plant, which has been upgraded by Phoenix Engineering. Managing over half a million tonnes of waste per year in Yorkshire, Yorwaste brought in Phoenix Engineering to carry out detailed process studies, and then to design and construct a major refurbishment of the plant. Jonty Olufsen,
managing director of Phoenix Engineering, said: “We designed a new lagoon arrangement to focus on treating higher strength leachates within the landfill, which were a problem for the previous treatment plant system. During the winter, the existing mechanical floating aerators meant the lagoon could only operate at around 5˚C, when to achieve the most effective biological treatment, it should have been more like 20˚C.” He added: “It is a complex
application due to the oval shape of the (1400m3
) lagoon. We
worked long and hard with Landia to find the best way to heat the biological mixed liquor and keep it warm during the winter
months. It was imperative that the contents of the lagoon would be aerated and mixed properly.” Comprising a Landia Chopper
Pump and venturi nozzle, four Landia 18.5kW AirJets were installed to provide thorough mixing and aeration. With its effective knife system, the Landia Chopper Pump ensures that the
propeller mixer’s job is to act as a brake, slowing down the movement in the lagoon. A consistent temperature of around 20˚C is now maintained throughout the winter. The second lagoon (also 42m x
24m with rounded ends) has been converted for raw leachate balancing, allowing for controlled blending of incoming leachates. For both lagoons, full process controls have now been installed, with a new sodium hydroxide storage and dosing system for pH control. The refurbishment
includes the installation of a new electrical control and automation system with control building, remote IO
aerator does not get clogged due to contaminants in the leachate. During the settlement period
of the leachate treatment plant, any movement in the lagoon had to be stopped as quickly as possible before the start of the next cycle to ensure suitable time for settling. So, in the 42m x 24m (approx.)
lagoon, a 3kW submersible propeller mixer from Landia was also installed. This small mixing unit runs for just a short time - only starting up when the AirJets stop. Aimed against the flow, the
and control panels. Speaking for Yorwaste, Callum
Duff, Landfill Restoration and Aftercare manager, said: “From start to finish, Phoenix Engineering worked with us to deliver a first-class refurbishment. With the Landia aerators and mixer, they have shown their keenness and capability to ensure that the leachate is treated with optimum efficiency.”
www.landiaworld.com
www.phoenix-engineers.co.uk
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