FREME system reduces Abbey's gas consumption
A
Spirax Sarco product story
Edited by the Engineeringtalk editorial team
Oct 30, 2008
A heat recovery system from Spirax Sarco has helped Abbey Corrugated to win the Carbon Trust Standard.
The installation of the Spirax Sarco system reduced the amount of gas burnt in Abbey's boiler by almost a quarter.
Abbey produces 160 million square metres of corrugated board a year at its site in Blunham, Bedfordshire.
It uses most of its plant steam to heat the plates and rollers in its three corrugators.
The skid-mounted FREME (Flash Recovery Energy Management Equipment) system from Spirax Sarco recovers the energy in condensate and flash steam from around the plant and uses it to preheat the feed water to the boiler.
Supplying hotter feed water reduces the amount of energy the boiler needs to raise steam.
First, hot condensate passes into a separation vessel where some of it flashes off as steam.
Next, the condensate and the flash steam each pass through a separate plate heat exchanger where they heat the pressurised feed water.
The flash steam also condenses.
The two streams then recombine before returning to the boiler feedtank.
Before the project, water entered the boiler at around 68 or 70C.
It now arrives at between 138 and 142C.
Abbey has managed to reduce its overall carbon emissions by around 15 per cent during a four-year campaign.
The Carbon Trust Standard aims to promote credible reductions in carbon emissions.
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