Weiher power plant
| Weiher power plant | |||
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| location | |||
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| Coordinates | 49 ° 20 '7 " N , 7 ° 1' 50" E | ||
| country | Germany | ||
| Waters | Saar | ||
| Data | |||
| Type | Steam power plant | ||
| Primary energy | Fossil energy | ||
| fuel | Hard coal | ||
| power | 656 megawatts electrical 30 megawatts thermal |
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| owner | Steag Power Saar GmbH | ||
| operator | Steag Power Saar GmbH | ||
| Start of operations | 1918 or Block III: 09/24/1976 |
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| Chimney height | 232 m | ||
| Website | www.steag.com | ||
The Weiher power plant is a German hard coal power plant . It lies with Quiigart in Saarland . The operator and owner of the power plant is Steag Power Saar GmbH .
Performance and architecture
The power plant has an electrical output of over 656 MW and a thermal output of 30 MW. Mine gas is also converted into electricity in a mine gas plant at the Weiher location , which can supply 5000 households with electricity. Architecturally, the Weiher power plant is a specialty, the boiler is an open-air boiler . The boiler is freely suspended from four 120 m high supports on a steel frame. This has the advantage that the boiler can freely expand downwards when it is fired. The power plant's coal storage facility has a capacity of 150,000 tons. These coal reserves are sufficient for up to 4 months to fire the power plant. As long as the Göttelborn mine was still in operation, coal was supplied directly by conveyor belt from the pit located directly next to the power plant. Since the mine was closed, the coal has been delivered by train. The coal is transported from the storage area via a conveyor system to 6 mills, where it is ground into coal dust before it is burned in the boiler. The cooling water for the power plant is obtained from the Saar via a 16 km long pipeline and cleaned in its own water treatment plant. The by- products of fly ash , boiler sand and FGD gypsum from coal - fired power generation are marketed by a subsidiary of STEAG GmbH.
The chimney of the power plant is 232 meters high.
Technical specifications
| Installed capacity | Gross output 724 MW |
| District heating output max. 30 MW th | |
| Firing | Coal dust firing, dry ash removal |
| Coal consumption | approx. 600,000 t / a |
| Steam generator | Forced flow boiler, simple reheating |
| One-pass tower boiler dry deashed | |
| Steam flow at full load 2,100 t / h sliding pressure operation | |
| Vapor pressure | 186 bar |
| Steam temperature | 525 ° C |
| Turbo set | four-casing condensing turbine |
| HP inlet: 177 bar / 525 ° C | |
| MD inlet: 36 bar / 530 ° C | |
| LP inlet: 6 bar / 280 ° C | |
| generator | Nominal power: 800 MVA |
| Generator nominal voltage: 21 kV | |
| Machine transformer | 2 half-load transformers |
| Nominal output: 385 MVA each | |
| Nominal voltage: 21 kV / 245 kV | |
| Cooling tower | Natural train |
| Height: 135 m | |
| lower diameter: 100 m | |
| Water flow: 60,000 m 3 / h | |
| Water vapor outlet from the cooling tower | 1,500 m 3 |
| Flue gas dedusting | 2 electrostatic precipitators |
| Flue gas desulfurization (RAE) | Lime washing process with limestone powder, gypsum as the end product |
| Flue gas denitrification (DeNO x ) | SCR system (Selective Catalytic Reduction) |
| Byproducts | Fly ash: approx. 30,000 t / a |
| Shell sand: approx. 3,000 t / a | |
| Gypsum: approx. 20,000 t / a | |
| For details of the information in this table, see | |
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history
In 1914 the Royal Prussian Administration decided to build another power plant in addition to the gas machine center in Heinitz and the steam power plant in Luisenthal . A construction site was set up from 1915, but the First World War delayed construction. In January 1918, the power plant, which was located in the immediate vicinity of the Göttelborn mine, started operations. At that time the output was 5 megawatts, it was not until 1922 that the output could be increased to 22 megawatts.
Weiher I was supposed to be built in the 1930s, but there were delays here too, this time due to the Second World War . Due to numerous drafts and delivery stops, it was not until August 15, 1944 that the output could be increased by 25 megawatts and the old power plant had to continue running. When the Saarland fell under French administration, the power plant was only half finished. Weiher I was put into operation in January 1951 and delivered 114 MW from March.
In 1963 and 1964 Weiher II was put into operation. The power plant had two block units (A and B), each delivering 150 MW. It was equipped with an electrostatic precipitator and melting chamber boilers. The power plant achieved a desulphurisation rate of 95%.
Weiher III was put into operation in 1976 after a three-year construction period and was Saarbergwerke AG's largest construction project . The flue gas desulfurization system was the largest in Europe at the time when it was commissioned. Today only Block III remains, the older power plants were decommissioned and demolished in 1973 (I) and 1999/2001 (II). In 2006, retrofitting measures increased the output from 680 MW to 697 MW.
On November 16, 2016, the energy company Steag commissioned large-scale battery storage units with an output of 15 megawatts at the Weiher power plant . Steag is investing 100 million euros in six locations in North Rhine-Westphalia and Saarland.
Requests for decommissioning
In 2016, the owner STEAG applied for the power plant to be shut down for 2017. However, the transmission system operator Amprion declared the power plant to be systemically relevant and requested STEAG to keep the power plant operational until at least November 2019. On April 26, 2018, STEAG GmbH, as the operator, again submitted an application for temporary shutdown of the power plant, whereupon Amprion again determined the system relevance. This resolution is valid until April 30, 2020. From December 2018 to February 2019, the Weiher power plant was requested three times to stabilize the power grid. In order to meet legal deadlines, an application was again made for temporary shutdown on April 29, 2019. The transmission system operator did not accept the application. The transmission system operator again determined the system relevance for the power plant and extended the period to April 30, 2022.
See also
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Web links
Individual evidence
- ↑ a b power plant list of the Federal Network Agency , status: 7.3.2019
- ↑ a b Power plant brochure Weiher power plant from STEAG GmbH (PDF)
- ↑ Hope for the Weiher power plant? . In: Saarbrücker Zeitung , November 17, 2016. Retrieved November 20, 2016.
- ↑ http://www.steag-grossbatterie-system.com/
- ↑ STEAG switches off coal-fired power plants . In: n-tv , November 2, 2016. Accessed November 2, 2016.
- ↑ Lothar Warscheid: Saar-power plants remain at the net. Saarbrücker Zeitung, January 21, 2017, accessed on August 13, 2017 .
- ↑ STEAG registers the Bexbach and Weiher 3 power plants for decommissioning . STEAG. April 26, 2018. Retrieved October 8, 2019.
- ↑ Alexander Stahl: Saarland Steag power plants remain systemically relevant . energate gmbh. September 17, 2018. Retrieved October 8, 2019.
- ↑ Power plants registered for temporary shutdown . sr.de. April 19, 2019. Retrieved October 8, 2019.
- ↑ STEAG registers two power plants in Saarland for temporary shutdown . Mining Report Glückauf. June 12, 2019. Retrieved October 8, 2019.
- ↑ Karin Mayer: Bexbach and Weiher power plants longer systemically relevant . r.de. January 29, 2020. Accessed February 11, 2020.