Pulp Paper & Logistics
ANDRITZ 17
In this way, an internal fuel source is created, disposal costs are avoided, landfill volume is reduced, and so is the burden on the environment. ANDRITZ develops innovative
waste-to-value technologies for sludge and reject treatment as well as smart recycling concepts for mill waste. Modular system designs with scalable sizes can be adapted to the specific waste streams of any mill.
Turning waste into fuel Dewatered rejects, sludge, and other mill residuals can be burnt to produce steam. The steam can be used directly in the paper mill or fed into a turbo-generator to produce electrical power. The heat for steam production can be produced either directly by burning the waste in a controlled environment or indirectly by generating a fuel gas that can be burned or further processed.
Figure 3: The ANDRITZ ReBal Ballistic Separator removes bulky material from a waste stream basted on the material’s ballistic behaviour.
There are a number of
technologies available for the purpose of turning waste into fuel: the front-end technologies are for handling the rejects and
preparing them for conversion into fuel; downstream processes convert the waste into solid, liquid, or gaseous fuels. ANDRITZ is working with various
technologies for both front-end and downstream processes. The modules available today
developed by ANDRITZ are for reject handling, sludge handling, drying, and fuel preparation at the front end, as well as the downstream pyrolysis technology and combustion systems (boilers and gasifiers). This equipment can be used in a stand-alone arrangement, as ‘process islands’, or can be integrated into a complete system.
Figure 4: UG Granulator from ANDRITZ for flexible shredding of large items of waste
How to make profit from mill waste Waste-to-value processes (detailed in Figure 2) enhance a mill‘s profitability by recycling the mill waste products. Each mill has individual needs. Therefore the ANDRITZ approach is to design a solution based on the mill’s specific goals and requirements. There is no standard solution, but there are standard modules that can be combined with some customised solutions. The basis is an analysis
4 May/June 2016
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