The research on combustion performance of dual-cycle chain combustion furnace.

With the advancement of carbon peak and carbon neutrality goals, the efficient utilization of clean energy has become increasingly important. Chemical-looping combustion (CLC) technology has attracted widespread attention as an efficient method for CO2 capture. However, its oxidation process usually relies on electric heating, which to some extent increases carbon emissions. The research group has independently developed a dual-cycle chain combustion furnace, which integrates the inner and outer furnaces in a nested structure to achieve the coupling of biomass combustion and chemical-looping combustion. In this study, cattle manure was used as fuel, and thermogravimetric analysis as well as thermal state experiments were conducted on cattle manure pellets. The thermogravimetric results indicated that at a heating rate of 20 °C/min, the weight loss rate of cattle manure reached nearly 40 % at 264 °C. The thermal experiment results showed that when the feed rate was 8.635 kg/h and the air volume was 102.272 m3/h, the temperature of the inner furnace reached 946 °C, while that of the outer furnace was 620 °C. When the feed rate was 7.505 kg/h and the air volume was 70.980 m3/h, the carbon conversion rate of cattle manure pellets reached as high as 99.260 %. Experimental results indicate that the cattle manure pellets exhibit favorable combustion characteristics.