关键词: 燃煤电站, 氧热法, 电石, 热力学, 化学反应, 热平衡模型, 燃煤电站, 氧热法, 电石, 热力学, 化学反应, 热平衡, 模型

Abstract: Calcium carbide reactor is in tandem with boiler in coal-fired power station integrated oxygen-fuel calcium carbide production. Using dry pulverized coal, lime and oxygen as raw materials, by-products flue gas and fly ash with unburned carbon were injected into furnace to release heat and burn in order to recover their thermal and chemical energy. Based on thermodynamics theory, a thermal equilibrium model of chemical reaction was established. Purity of calcium carbide, consumption of raw materials and power, utilization and recovery of energy were calculated, and the influence of different materials on the above parameters was discussed. Purity of calcium carbide was 65.97%. For producing 1t CaC₂, consumptions of pulverized coal, lime and oxygen were 1747.08kg, 980.5kg and 1285.25m³ respectively, power consumption was 554.28kW·h. When increasing oxygen purity, each parameter changed little but power consumption of oxygen-production increased greatly. While using different pulverized coals, each parameter changed significantly. This study proved the feasibility of the above process, and provided theoretical guidance for choosing raw materials in practical production.

Key words: coal-fired power station, oxygen-fuel, calcium carbide, thermodynamics, chemical reaction, thermal equilibrium model, coal-fired power station, oxygen-fuel, calcium carbide, thermodynamics, chemical reaction, thermal equilibrium, model