Huntsman Tioxide, the manufacturers of Titanium Dioxide which is used to provide the white pigment colouring in a wide range of products, from toothpaste to paint, selected npower cogen to build and operate a CHP scheme to meet the future energy demands of the production site.
The £18 million CHP scheme is based on a Cyclone gas turbine generator and supplementary/ auxiliary fired waste heat recovery boiler combined with a steam turbine with backup auxiliary boilers. The plant, which has completely replaced the life expired steam production facilities at Tioxide, Grimsby, entered full commercial operation in July 2003.
The 13MW gas turbine, 55 tonnes per hour waste heat recovery boiler and 9MW steam turbine generator operates with an overall efficiency in excess of 80% compared with around 36% for a conventional power station and 56% for a CCGT. The heat and electrical efficiencies achieved qualify the scheme as ‘Good Quality CHP’ under DEFRA’s ‘CHP Quality Assurance Programme’.
The scheme’s fuel efficiency and the contract terms result in significant savings for Huntsman Tioxide on their annual energy expenditure. They also benefited from replacing the old steam plant with a new utilities plant on their site without major capital expenditure. Meanwhile, the environment gains from Huntsman Tioxide’s use of CHP technology to replace the existing boiler plant, ensuring the site meets its internal target to reduce emissions of SOx and NOx by 70% from the 2000 baseline.