Högdalen, Sweden
Case study – Individual transport solutions for Sweden's waste incineration plants
Slag and Ash TransportSlag, Ash
2019-2020
Trough belt conveyors, trough chain conveyors, trough screw conveyors, components
special design of the components
Loibl delivers to Högdalen in Sweden
The Högdalen CHP plant has been in operation as a waste incineration plant since 1970. The power plant can process up to 700,000 tons of waste annually, which is converted to electricity and heat. Högdalen CHP plant generates energy for Stockholm's southern district heating network. From 2019 to 2020, the site's two oldest lines were replaced by a new incineration line. Loibl Förderanlagen GmbH planned, designed and supplied the slag as well as ash transport system and subsequently commissioned it.
Exceptional slag transport. At the end of the combustion grate, the combustion residues enter a downstream ram deslagger and are extinguished in the water bath inside. A specially designed LASHBELTCON® (troughed belt conveyor) from Loibl transports the slag into the slag bunker of the plant. The LASHBELTCON® was designed in a particularly solid construction. It has a belt width of 2,000 mm and is equipped with a cleaning scraper along the entire transport length. Any trickle material is conveyed directly via the cleaning scraper into the adjacent slag bunker.
Special ash transport. The ash produced by the combustion process is reliably transported away via Loibl equipment. A discharge screw conveyor was installed on the 2nd/3rd boiler pass, which returns the ash to the on-site slag drop shaft. This LASHSCREWCON® including the drop shaft is equipped with a stainless steel contact protection. The fly ash at the horizontal hoist is conveyed via rotary valves as well as a LASHSCREWCON® into a collecting screw. The LASHCHAINCON® at the economizer is designed as a single strand chain conveyor and discharges the accumulating ash in the upper run to the collecting screw. The collection screw was designed with a split trough and screw shafts. This specification was adapted to the structural conditions on site and is conducive to changeover as well as dismantling operations. The collection screw discharges into a reversible LASHSCREWCON®, which discharges the ash into an on-site stockpile trough chain conveyor and, in the event of a failure, into an emergency ash removal container.
Loibl's scope of Supply and Services
- Consulting and complete planning of the slag and ash handling system
- Detailed engineering
- Manufacturing in Straubing, Bavaria
- Complete plant construction
- LASHBELTCON® - Troughed belt conveyor
- LASHCHAINCON® - Trough chain conveyor
- LASHSCREWCON® - Trough screw conveyor
- Slide gate valves
- Rotary feeders
- supporting structures, platforms
- Assembly incl. final assembly inspection
- Cold and hot commissioning
Your direct contact
Are you interested in our products? Then get in touch with us! We are happy to be there for you personally.