Prosper coking plant

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The coking plant from the tetrahedron seen from

The Prosper coke is a coke plant with location Bottrop . It is one of the three coking plants in operation in the Ruhr area . The Prosper coking plant is the last coking plant to be operated by the successor company to Ruhrkohle AG - RAG Deutsche Steinkohle AG . It was taken over on June 1, 2011 by the steel company ArcelorMittal .

history

In 1928 a plant designed as a central coking plant with initially four batteries of 45 ovens was put into operation in Bottrop to replace the many smaller coking plants and to be able to work more economically overall. In the 1930s, after adding three batteries, the plant delivered around 5,000 t of coke per day.

The coking plant was badly damaged in the attack on November 30, 1944 during the Second World War.

Between 1982 and 1989 the coke batteries were completely replaced by modern technology. Today the plant consists of three batteries with a total of 146 coking chambers. The daily output is 5,500 t of coke. The “white side” was kept up-to-date in 1982 with a gas desulphurisation system and in 1998 with a debenzene removal system . The coking plant has a workforce of 480 employees.

The collieries and mining companies operated around 30 coking plants in the Ruhr area until the 1960s.

Pictures of the operational sequence

  • open oven

  • Filling the wagon ...

  • ... with the glowing coke and ...

  • ... drive to the extinguishing tower

  • extinguished coke is temporarily stored in the bunker

Gas production and by-products

The coke oven gas produced in the coke ovens is extracted from the ovens with gas suction devices. The gas suction devices are turbo machines that date back to the time the coking plant was built. The cleaning stages are arranged in front of the gas suction devices in order to avoid very heavy deposits on the impellers and housing. The unpurified coke oven gas consists of hydrogen , methane and carbon monoxide as well as a very large number of organic and inorganic compounds that are marketed.

The first step in gas processing is gas cooling, which lowers the gas temperature to 80 ° C. It is mainly the tar that precipitates here , which can still be pumped at higher temperatures. The other tar components are separated out on electrostatic precipitators. The tar obtained from the gas is fed to storage tanks.

The H 2 S scrubber follows; The hydrogen sulphide is converted into sulphurous acid by means of an aqueous washing solution . Sulfuric acid is extracted in the deacidification plant and then fed to the storage tanks.

The aforementioned gas suction devices follow; then the gas is further cleaned in the ammonia scrubber. Ammonium sulfate is extracted from the ammonia water, which is used as fertilizer.

40% of the coke oven gas produced during coking is used to heat the coke ovens and a smaller proportion is used to generate process steam in the boiler house. In the past, the partially cleaned gas was temporarily stored in the smaller Klönne-Scheiben gas container , which has a volume of 10,000 m³. This container is now out of service.

The excess gas is compressed to approx. 10 bar. Compression used to be done with turbo compressors ; these were replaced by two-stage screw compressors in the 1990s. The compressed gas is cooled first. The sulfur , which is present as H 2 S and SO 2, is then bound to lawn iron ore in the fine cleaners . The gas is then passed through the high pressure benzene washers and the benzene is absorbed by the wash oil. In the last step, the gas is dried on a refrigeration dryer. It is a NH 3 - refrigeration system used for cooling of the gas.

The cleaned coke oven gas can be temporarily stored in the MAN disk gas tank , which has a volume of 250,000 m³. The gas is marketed by E.ON -Ruhrgas AG.

criticism

Local residents have been complaining for years about the nuisance caused by emissions released by the coking plant. They threatened a class action lawsuit in May 2020. Since 2015, the emission of benzo (a) pyrene (BaP) has been above the statutory target value every year. The target value for BaP immissions is specified in the 39th ordinance for the implementation of the Federal Immission Control Act (BImSchV) . For benzo [a] pyrene, a target value of 1 ng / m³ (nanograms per cubic meter of air) applies as the annual mean. The values ​​are measured at the measuring station of the State Environment Agency North Rhine-Westphalia . When it became foreseeable at the end of 2019 that the annual average would again be well above the target value, the Münster district government issued an administrative order in December 2019 in which additional and more specific measures were laid down. The implementation of the administrative order is regularly checked by the district government.

On March 13, 2020, the 19th civil chamber of the Essen Regional Court sentenced the operator Arcelor Mittal as a defendant to refrain from "adding coke or carbon-containing particles in single or multiple grain sizes" to the plaintiffs' property and to take appropriate measures through the the coking plant and ancillary facilities it operates prevent such emissions from being introduced. Otherwise, the operator faces a fine of 250,000 euros.

literature

  • Joachim Strunk: DSK AG's Prosper coking plant . In: Ring Deutscher Bergingenieure (Ed.): Mining . No. 3 . Makossa, Gelsenkirchen November 2007, p. 101-104 ( rdb-ev.de [PDF; 2.4 MB ; accessed on April 25, 2011]).

Web links

Commons : Prosper coking plant  - collection of images, videos and audio files

Individual evidence

  1. ↑ Helga Pillar: Five to twelve the last RAG coke. WAZ, June 1, 2011, accessed June 9, 2013 .
  2. ↑ Bottrop coking plant threatens class action. May 15, 2020, accessed June 14, 2020 .
  3. ↑ § 10 39th BImSchV - single standard. Retrieved June 14, 2020 .
  4. ↑ Measuring sites for air quality monitoring in NRW. Retrieved June 14, 2020 .
  5. ^ Münster district government - air quality and mitigation measures in the vicinity of the Prosper coking plant in Bottrop. Retrieved June 14, 2020 .
  6. ^ Essen Regional Court, 19 O 10/18. Retrieved June 14, 2020 .

Coordinates: 51 ° 31 ′ 10 ″  N , 6 ° 58 ′ 24 ″  E