Wilton power stations

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Wilton power stations
Wilton power station.JPG
Wilton power station viewed from Lackenby
Wilton power stations
CountryEngland
Location Middlesbrough
Coordinates 54°35′22″N1°07′07″W / 54.5894°N 1.1185°W / 54.5894; -1.1185
StatusPeak operational
Commission date 1953
Wilton 10: 2007
Operator(s)
Thermal power station
Primary fuel Coal
Secondary fuelOil and Gas
Tertiary fuelBiomass
Power generation
Nameplate capacity 227 MW
External links
Website www.sembutilities.co.uk/utilities/power.html
Commons Related media on Commons
[ edit on Wikidata]

The Wilton power station refers to a series of coal, oil, gas and biomass fired CHP power stations which provide electricity and heat for the Wilton International Complex, with excess electricity being sold to the National Grid. It is located on the Wilton site in Redcar and Cleveland, south of the town of Middlesbrough in North East England. The station has provided for the site since opening in 1952, when it was operated by ICI. The station is currently owned and operated by SembCorp Industries.

Contents

It comprises a variety of generating sets, with units of different ages and various fuels. The station is currently mainly coal and oil fired, but also has a CCGT unit. Wilton 10 was opened at the station in 2007, the UK's first ever large scale biomass only power station. The power station's total generating capacity across all of its units is 227  megawatts. There are plans to build another plant, Wilton 11, a waste to energy plant.

History

Wilton Power Station has been generating electricity and providing steam to the plants on the Wilton International complex since March 1952. A secondary turbine commissioned at the station in November 1951 is still operating there today. [1] For a long time the station was operated by Imperial Chemical Industries (ICI), but they sold the station to American company Enron in November 1998. [2] In early 2002 Enron went bankrupt, and the station was sold to SembCorp. [3]

The station has been approved as a "Good quality" combined heat and power plant under the CHPQA registration scheme. This means that despite burning fossil fuels like coal and oil, the station is exempt from the Climate Change Levy, a tax which otherwise would have been put on the fuels supplied to the station and the electricity generated by it. [4]

Specification

Wilton Power Station is a 197  megawatt (MW) fossil fuel power station, which is currently in constant operation. [5] [6] Over the years, nine boilers have been in operation at the station. [7] In the 1970s the station had a generating capacity of 300 MW and produced 1,200 tonnes of steam per hour. In this period the station was burning waste from the chemical site, byproducts such as: liquid petroleum gas, tars, waste lubricating oils, emulsion residues, waste from aromatic and olefin plants and hydrogen gas from the nylon plant. [8] There are currently three generating sets in operation at the station, two of which are fired by coal, the other of which is a gas turbine fuelled by natural gas. [4] [6] [9] Each of the two coal-fired generating sets are powered by a high pressure boiler, which are each capable of producing a continuous maximum rate of 280 tonnes per hour of steam, at 1,700  psig. Each boiler is then connected to a 33 MW turbine generator. Intermediate pressure steam is then either diverted and fed to other plants in the complex, or sent to three secondary generating sets. After the secondary generating sets, low pressure steam can then be distributed to plants in the complex. Boiler Number 6, one of the coal boilers, was mothballed in 1997, however in 2001 it was refurbished and restored to operation. In 2002, one of the secondary turbines was replaced by a newer unit. In the same year, an automation project involving the boilers, turbines and ancillary equipment was completed. [4]

Operations

Coal is brought to the power station by rail to the Wilton rail delivery terminal and unloaded at the station using a merry-go-round system. [6] The coal is provided by a small number of opencast mines in Northumberland. [10]

Electricity is generated for the major plants on the Wilton complex at 11  kilovolts (kV) and distributed throughout the complex using one of the largest privately owned distribution systems in the world. This system is connected to the National Grid so that surplus electricity can be distributed using four National Grid owned transformers at 66 kV and 275 kV. On top of this, the station produces around 4,000,000 tonnes of steam per year for the plants on the complex. [4]

In late 2003, plans to install a 40 MW gas turbine at the station were finally fulfilled, after they were put off because of then owner Enron's bankruptcy. The gas turbine installation was completed in 2004, and it replaced an oil-fired boiler at the station, resulting in reduced emissions from the station. [3] [4] However, the station has retained the flexibility to fire oil as a backup to coal and gas. [3]

In October 2003, SembCorp applied to the Environment Agency for permission to burn 110,000 tonnes of cow fat (tallow) from the carcasses of animals slaughtered during the BSE Crisis of 1996. [11] [12] The tallow bought was a large portion of the 200,000 tonne stockpile stored on farms in Merseyside and near London. The tallow was brought to the station by road tanker from Merseyside. At the power station it was stored in a tanker, awaiting burning. Following consultation and a 10,000 tonne trial burn between March and May 2004, permission for the burning of the tallow was granted in August 2004. [12] Following a £55 million boiler overhaul in 2005, the station began co-firing biomass. [7]

Wilton 10

SembCorp announced plans to build the UK's first wood-only burning power station in March 2005. [13] The Wilton 10 Power Station (so called because it was the tenth boiler constructed at the Wilton Power Station) cost £30 million to construct and was built alongside the other Wilton Power Station units. [5] [7] It began generating electricity in September 2007, but was officially opened on 12 November 2007 by Energy Minister Malcolm Wicks. [13] 400 people were employed in the station's construction and there are 15 permanent jobs at the station. [5] The station burns 300,000 tonnes of a combination of sustainable wood, sawmill waste and otherwise unusable wood offcuts a year to produce 30  megawatts  (MW) of electricity, as well as 10 MW of thermal energy in the form of steam, which is piped for use in the rest of the Wilton complex. [5] [7] [13] It operates separately from the fossil fuel power station. [5] 80,000 tonnes of waste wood is supplied to the station each year from neighbouring company UK Wood Recycling. [14]

Wilton 11

On 9 August 2010, Sembcorp announced they were teaming up with SUEZ UK to build a £200 million waste to energy plant alongside the current plants, known as Wilton 11. The plant would treat up to 400,000 tonnes of waste a year to generate 35 MW of electricity. Between 150 and 200 jobs were created in construction, and around 50 permanent jobs created when the plant was completed. There is a possibility that the plant could be supplied with waste using the site's already existing rail link. [14] The plant began operation in late May 2016 and burns the compacted domestic waste of Merseyside brought by rail from Knowsley, near Liverpool. [15] The plant generates enough power for 63,000 homes.

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References

  1. ↑ Race, Steve (4 December 2001). "A power station at the heart of manufacturing industry on Teesside is celebrating 50 years of operation early next year". Evening Gazette . Retrieved 29 December 2008.
  2. ↑ Strong, Justin (27 November 1998). "Ici Continues Sell-off Policy - Wilton Plant Sold To Enron". The Journal. Retrieved 28 December 2008.
  3. 1 2 3 King, Graeme (18 October 2003). "£20m plan does staff a power of good". The Journal. Retrieved 28 December 2008.
  4. 1 2 3 4 5 "Power". SembCorp Industries. Archived from the original on 3 May 2008. Retrieved 29 December 2008.
  5. 1 2 3 4 5 "Wood Burning Power Station at Wilton 10, United Kingdom" . Retrieved 26 November 2008.
  6. 1 2 3 "Spotlight on Wilton" (PDF). p. 8. Retrieved 29 December 2008.
  7. 1 2 3 4 Pardo, Matthew (7 December 2004). "Poweringup". Evening Gazette . Retrieved 28 December 2008.
  8. ↑ Skeet, T.H.H. (19 July 1974). "PRODUCTION OF HEAT AND ELECTRICITY FROM WASTE ETC". Parliamentary Debates (Hansard) . Retrieved 2 September 2009.
  9. ↑ "Beyond Conventional Utilities and Singapore". 2004. Archived from the original on 6 October 2011. Retrieved 29 December 2008.
  10. ↑ Wilkinson, Frances (June 2005). "Planning for coal" (PDF). p. 19. Retrieved 29 December 2008.
  11. ↑ Pardo, Matthew (23 October 2003). "'Pong probe' into fat burner". Evening Gazette . Retrieved 29 December 2008.
  12. 1 2 "Tallow Burning at Wilton - a Briefing". 28 August 2004. Archived from the original on 9 August 2003. Retrieved 29 December 2008.
  13. 1 2 3 Jelly, Jim (12 November 2007). "Powered by nature". Evening Gazette . Retrieved 28 December 2008.
  14. 1 2 "SITA and Sembcorp plan £200m Teesside EfW". 10 August 2010. Archived from the original on 14 March 2012. Retrieved 16 December 2010.
  15. ↑ Branch Line News No 1271, Branch Line Society, 17 December 2016
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