关键词: 铜渣, 木屑, 气化, 热力学, 余热利用

Abstract: In this paper,the experiment of sawdust gasification over copper slag catalyst was conducted,then the effect of the gasification agent and the carrier gas was studied on the composition and heating value of the syngas. When the water vapor equivalent ratio to biomass was 0.058,the yield of tar was approximately decreased by half and the hydrogen yield was improved by 63.04%,so the gasification efficiency increased to 75.03%. After obtaining the ideal experimental conditions,thermodynamic analysis of the sawdust gasification with copper slag was performed based on the energy balance. Then,the coupling relationships were obtained between copper slag,sawdust and water vapor. The sensible heat of molten copper slag was 1773kJ/kg at 1250℃. When making full use of copper slag comprising sensible heat and latent heat,the heat value of synthesis gas was 13319kJ from the sawdust gasification. Under ideal gasification conditions,1kg sawdust met 1.92kg copper slag,and the recycling energy utilization of hot copper slag catalytic sawdust gasification increased to 62.94%.

Key words: copper slag, sawdust, gasification, thermodynamics, waste heat recovery