FEATURE BOILERS, PUMPS & VALVES


Producing renewable energy from food waste N


ot only can Arjun Infrastructures’ power plant in London generate 17MW of


renewable energy from food waste, but it can also utilise fats, oils and greases (FOG). “This is a first-of-a-kind plant,” explained Phil


Jones, director at 2OC, which developed the plant and now manages it on behalf of Arjun. However, joining up assets that haven’t previously been linked together before has presented many engineering challenges. Originally specified by Jacobs Engineering, the


two 90kW lubrication pumps for the Combined Heat and intelligent Power (CHiP) plant had to be installed by main contractor J. Murphy and Sons in a very tight space. In addition, the pumps had to go below ground, beneath the plant’s engine. David Brown, from pump manufacturer Börger,


commented: “We designed a special base frame so that the very robust EL1550 Classic pumps could be mounted vertically into the small footprint (just 3m by 4m) – and then, for easy servicing, lifted out and put on their side.” Producing enough energy for approximately


40,000 homes, Arjun’s power station presents no shortage of high temperatures for its assets to cope with. As a result, the Börger pumps had special cooling radiators for the gearboxes and motors installed to meet demands. However, with the Börger pumps and the need to make all of the new power plant’s equipment


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work together efficiently and economically, came a demanding, non-extendable, deadline. Jones said: “I can’t deny that the pressure was


well and truly on. We had to meet the deadline for all-important government ROCs (Renewables Obligation Certificates) that support large-scale renewable electricity projects in the UK. To get the plant off on the right operational and financial footing, we had to make things happen to hit that deadline. We could not take our time.” However, the construction contractors’


engineers were initially concerned about the noise and vibration of the two Börger pumps. Brown explained: “It didn’t help us or 2OC that,


due to the space limitations, the pipework for one pump was straight whilst the other one was more complex – so had to cope with some pressure loss. Ultimately, we ran a test in Germany with 2OC in attendance to show that the pumps were performing fine. As it turned out, the vibration was down to nothing more than extra torque being required. Later, after another 500 hours running time, an inspection confirmed that there were no issues.” It was also decided to change the pump’s


removable rotor tips from rubber to a fully stainless-steel solid rotor design because of the high temperatures. Together with the stainless- steel pump-head, it now means that there is almost zero maintenance required.


  THIS IS MARTA...MARTA RECENTLY JOINED FULTON!


And because Marta has recently joined the company as service supervisor, she wants to introduce herself and remind you that Fulton offers more than just heat transfer solutions and multi-award-winning steam boilers. In fact, Fulton’s aftercare portfolio includes:


• steam boiler installation and commissioning • City & Guilds accredited boiler operator training to INDG436 & BG01-R2 • water treatment service provision and training to BG04 & EN12953 • boiler practical and fault fi nding training • boiler and water treatment service contracts • steam trap surveys • technical boiler house risk assessments • site mass balance assessments and system design • boiler spares and repair


Want to know more? Then email aftercare@fulton.co.uk. Built by J. Murphy and Sons, Arjun’s power plant


sees 75GWh of the electricity sold to Thames Water for its Beckton sewerage processing plant (home to 64 Börger pumps), whilst the remaining 55GWh is purchased by Centrica. Heat from the engine is supplied to the adjacent


gas pressure reduction station owned by Cadent (with whom Börger also has pumps in a very important application), largely replacing old gas boilers that used to pre-heat the gas – whilst heat recovery cycles of the CHiP technology increase the thermal efficiency of the Arjun plant. Jones concluded: “Our pursuit of getting this


unique power station where it needs to be has not been easy, but very much in line with what government is promoting we now have a very neat and efficient plant. This includes the Börger pumps, which are proving very efficient, reliable and easy to maintain thus far.”


Börger T: 01902 798977


Home of the award-winning | E The World’s Best Steam Boiler 


www.fulton.co.uk +44 (0)117 972 3322 aftercare@fulton.co.uk


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