Application of Modified NiCrMo Alloy Systems for Boiler Tube Surface Protection in Waste-to-Energy Environments

Internationally, Waste to Energy and Incineration markets continue to grow in capacity as fossil fueled facilities decline and nuclear generation is curtailed. With this comes a greater need to burn more corrosive materials combust at higher temperatures and extract more energy. The reliability burden that this places on operators of plants is re-opening opportunities for thermal spray solutions as a cost effective solution for boiler tube protection. Where maintenance costs, opportunity costs and access restrictions may preclude alternative in-situ technologies, thermal spray technology may fill a gap in providing new reliable and flexible process and materials technologies for both mid- and long-term protection of water wall and superheater tubes. While historically thermal spray coating solutions have had a spotty record in waste to energy environments, advances in both process and materials technology specifically for WTE environments is such that coating performance now approaches the performance of high alloy wrought materials. This is verified through accurate laboratory modeling and scale tests and trials conducted by OEM’s and plants.

The need for incineration capacity for waste materials, whether from municipal solid waste or from industrial waste requirements has increased as a result of zero landfill andprogressive recycling policies. For many European and Japanese markets waste incineration is the only viable alternative to previous methods of waste disposal. The European Union Landfill Directive (1999/31/EC) specifically precludes certain materials such as hospital waste, tires, and certain reactive and flammable materials from land filling.



Copyright: © TK Verlag - Fachverlag für Kreislaufwirtschaft
Source: Waste Management, Volume 6 (September 2016)
Pages: 10
Price: € 10,00
Autor: Iain Hall
Kwang Han
Dr. Tri Shrestha

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