Intensification of Ignition and Combustion of Composite Fuels Based on Coal Sludge
D. O. Glushkov, K. K. Paushkina
Tomsk Polytechnic University, Tomsk, Russia
Keywords: waste oil, coal-water slurry, droplet, syngas, high-temperature air, combustion
Abstract
An experimental study of the ignition and combustion processes of composite liquid fuel (CLF) droplets based on coal cleaning waste in a high-temperature oxidizer environment at 700 ÷ 900 °C was performed. The effect of adding waste motor oil as a component of the CLF and as a feedstock for generating syngas, which was fed to the CLF combustion zone, was investigated. The feasibility of co-combustion of CLF with syngas was experimentally confirmed. The gas-phase ignition delay of CLF droplets with the addition of syngas to the combustion zone is 1.1 ÷ 1.2 times shorter compared to CLF combustion without the addition of syngas. Under these conditions, the heterogeneous ignition delay is 1.3 ÷ 1.7 times shorter, and the fuel burnout duration is 1.2 ÷ 1.5 times shorter. The use of waste oil as a component of composite fuel is characterized by a significant improvement in energy performance, which, combined with the increased combustion temperature, makes this strategy the most attractive for practical implementation.
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