All six units are served by an independent wet limestone-gypsum flue gas desulphurisation (FGD) plant, which was installed between 1988 and 1996.
This diverts gases from the boilers and passes them through a limestone slurry, which removes at least 90% of the sulphur dioxide (SO₂).
This is equivalent to removing over 250,000 tonnes of SO₂ each year.
The process requires 10,000 tonnes of limestone a week, sourced from Tunstead Quarry in Derbyshire.
A byproduct of the process is gypsum, with 15,000 tonnes produced each week.
This goes to be used in the manufacture of plasterboard.
The gypsum is sold exclusively to British Gypsum, and it is transported by rail to their plants at Kirkby Thore (on the Settle-Carlisle Line), East Leake (on the former Great Central Main Line) and occasionally to Robertsbridge (on the Hastings Line).
DB Cargo UK transport the gypsum.
All six units are served by an independent wet limestone-gypsum flue gas desulphurisation (FGD) plant, which was installed between 1988 and 1996. This diverts gases from the boilers and passes them through a limestone slurry, which removes at least 90% of the sulphur dioxide (SO₂). This is equivalent to removing over 250,000 tonnes of SO₂ each year. The process requires 10,000 tonnes of limestone a week, sourced from Tunstead Quarry in Derbyshire. A byproduct of the process is gypsum, with 15,000 tonnes produced each week. This goes to be used in the manufacture of plasterboard. The gypsum is sold exclusively to British Gypsum, and it is transported by rail to their plants at Kirkby Thore (on the Settle-Carlisle Line), East Leake (on the former Great Central Main Line) and occasionally to Robertsbridge (on the Hastings Line). DB Cargo UK transport the gypsum.
Drax Power Station