Abstract
The feasibility of the replacement of coal with solid-recovered fuel (SRF) transformed from waste lubricants was investigated in this work. In addition, the emission characteristics of SRF reclamation in a cogeneration plant were evaluated. The raw waste lubricants collected from a factory that manufactures tinplate cans were pretreated, mixed with wood dust, bentonite, and coal ash, and then remolded into pellet SRF. The coal and remolded SRF were reclaimed in a cogeneration plant. The reclamation performance of the tested fuels was evaluated by analyzing the pollutant characteristics of the bottom ash, fly ash, and flue gas. The PCDD/F concentrations in the flue gas in the runs without coal (0.003 ng I-TEQ Nm−3) were slightly lower than those in the runs with coal (0.102 ng I-TEQ Nm−3). According to the monitoring data for CO, O2, NOx and combustion efficiency, the substitution of SRF for coal improved the combustion conditions. The results showed that transformation of waste lubricant into SRF for reclamation is a promising method by which to take both waste treatment and energy regeneration into consideration.
Highlights
Due to rapid industrial development, the amount of waste being generated has increased dramatically in the last few decades
Incineration is applied to dispose of various types of materials, including organic liquid waste, municipal solid waste, organic sludge, refuse-derived fuels (RDFs), and even unsorted residual waste (Arena, 2012; Myrin et al, 2014; Leme et al, 2014)
The viscosity of the waste lubricant was further reduced to about 40 cP at 80°C, and it was possible to dispose of the waste lubricant above this temperature
Summary
Due to rapid industrial development, the amount of waste being generated has increased dramatically in the last few decades. The priorities for waste treatment, as imposed by European strategies for waste management, include prevention, reuse, recycling, recovery of energy or resources, and disposal, in that order (Directive 2008/98/EC) Following these strategies, technological development for energy recovery from waste has flourished for the last few decades (Chang et al, 1999). Incineration is an efficient technology that can be used to convert waste into energy and has several advantages It dramatically reduces the mass of waste by approximately 70 to 80% and the volume by approximately 80 to 90% and increases the service life of landfills (Consonni et al, 2005).
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