Flash steam recovery saves cardboard maker £40,000 per year 28 June 2013

A Spirax Sarco flash steam recovery system is saving Jardin Corrugated Cases nearly £40,000 per year and has reduced the plant's CO2 emissions by 282 tonnes per year.

What's more, the Ely, Cambridgeshire-based plant is reporting that the whole project was financed by an interest-free loan through the Carbon Trust.

A spokesperson for Jardin explains that flash steam had been escaping from its 11,000 sq metre manufacturing site for some time, wasting energy and creating a poor environmental image.

Spirax Sarco designed, installed and commissioned a flash steam recovery system, and applied for the Carbon Trust loan on behalf of Jardin Corrugated Cases.

The system saves 2.8 tonnes of CO2 per £1,000 spent, significantly beating the Carbon Trust's loan criterion of a minimum two tonnes per £1,000 spent.

At the heart of the new installation is a Spirax Sarco FREME (flash recovery energy management equipment) system that captures all usable heat in the condensate from the steam system, returning it to the boiler.

FREME works by passing returning condensate through a heat exchanger where it heats the boiler feed water – with heating on the high-pressure side of the boiler feed pumps, so the system can safely heat the water to more than 100°C without boiling and causing pump cavitation.

Spirax Sarco also provided automatic boiler blowdown controls with heat recovery, boiler feedtank insulation and a packaged pump system to ensure that all condensate from the main corrugator is returned for recovery.

As well as the savings in energy and carbon dioxide emissions, Jardin reports that the system is saving water and water treatment chemical costs. It also means no more manual blow downs every day.

Brian Tinham

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Spirax Sarco Ltd

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