Case story

INSTALLED COAL DUST PIPING BELLOWS

Power plant

Poland

EN 13445

State-of-the-art Coal Dust Piping Bellows engineered to eliminate coal dust emissions between mills and burners! In 2018 Belman successfully designed and manufactured 41 sets of Coal Dust Piping bellows for a newly built unit in a Polish power plant. The Coal Dust Piping Bellows are now installed and successfully tested. The unit will be commissioned in the near future.

 

Installation point and requirements

The design parameters were critical due to the location of the Coal Dust Piping Bellows on the boilers pulverized fuel ducts. The power plant was equipped with supercritical once-through pulverized fuel boiler for bituminous coal and an extraction-condensing turbo. This was located in a closed cooling water system with a wet cooling tower. Coal dust is extremely abrasive and can clog the bellows of the Coal Dust Piping Bellows. For that reason, a special Coal Dust Piping Bellow solution was required.

 

The design of the Coal Dust Piping Bellows

To learn more about the design of the Coal Dust Piping Bellows, please refer to the case story:

DESIGN FEATURES

The Refractory Lined Expansion Joints have the following design parameters:
Dimension: DN 600 • Length: 3460 mm • Medium: Air mixture of coal dust • Design temperature: 140°C • Design pressure: 0,05 barG • AX: +/-80 mm • LA: +/-596,6 mm • Bellows: 1.4541 • Welding ends: 1.0345 • Flanges: 1.0425 • Middle pipe: 1.0345 • Design code: EN 13445

CLIENT BENEFIT

  • Short on-time delivery
  • Coal dust emissions prevented between the mill and the burner contribute to reducing pollution and environmental issues for the plant
  • Reliability of the Expansion Joint designed to work under the operating parameters
  • Increased working efficiency and lengthened life cycle reduce operating costs and downtime.
  • Benefit from the considerable know-how of an experienced manufacturer
RELATED INFORMATION

TECHNICAL information

  • Technical information on Angular Expansion Joints is available in the Expansion Joint Catalogue
    page 29 -30
  • Installation examples of Angular Expansion Joints are available in the Expansion Joint Catalogue
    pages 68 -73

REFERENCES 

Vattenfall • Termo Petroleo • Ørsted (Dong Energy) • RWE • Irkutsk Energo • STEAG • Novosibirsk Energo • Mosenergo  •  Drax • Hofor • Tauron • PakGen • BHEL • Ceylon Electricity Board • Rosatom • RWE Npower • Fortum • EDF (British Energy) • AEP Energy Services •  E.ON • Inter RAO • Fernwärme Wien • ENGIE Electrabel • Enel • Howden Turbo UK • Uniper • Veitur • Ceylon • Howden • Mitsuibishi Power • Stadtwerke Flensborg • Kraftzer •

TRUSTED CRAFTMANSHIP

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