Steam generators cut energy usage
Published: 13 July 2012 - Heather Ramsden
Babcock Wanson ESM Steam Generators – the first steam generators to be used with the HJ Heinz Group – have been installed into Heinz's Dundalk facility in Ireland as part of a strategy to reduce energy consumption.
Producing frozen ready meals primarily for the UK, the Dundalk plant is a large steam user, using steam in the cooking process and to heat water for wash down. The plant had been using a large old firetube boiler. But, as part of a 12-month plan to improve energy efficiency across all operations including the steam boiler system, the decision was made to switch to two Babcock Wanson ESM7000 sequence controlled steam generators complete with high efficiency economisers. These have been installed into the new boiler house.
A coil type steam generator, the ESM provides operating efficiencies of circa 96-97 per cent overall and low emissions. It utilises modern controls to maintain a close ratio between the burner firing rate and water input with inverter drive of both the combustion air and feed water pumps. This ensures close control of both steam output and steam quality and lowest practicable consumption of electrical power.
Heinz’s Dundalk plant has already recently achieved certification under the Energy Agreements Programme (EAP) to IS393:2005 and is expecting further efficiency improvements with the ESM Steam Generators in place. In addition, the ESM7000s will also better match the steam load than the previous system was able to accommodate.
Further benefits include improved safety (the chance of a pressurised water explosion is virtually eliminated), simplicity of control, a compact size and quieter, cleaner and cooler operation.
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