摘要
利用Aspen Plus软件对某600MW富氧燃煤电厂褐煤的干燥过程进行模拟分析,研究干燥介质、烟气温度、流量、烟气中CO2浓度和H2O含量对褐煤干燥特性的影响.结果表明,富氧燃煤电厂的烟气适合于褐煤的干燥,烟气中的CO2可以有效抑制褐煤的氧化自燃,使干燥过程更加安全,并能增强烟气的干燥能力,H2O会抑制煤中水分的蒸发;干燥温度和干燥流量的增加都会加速褐煤达到干燥要求,干燥温度的影响更明显.通过分析得出烟气温度150℃和流量1.4×106 m3/h为600MW富氧燃煤电厂的最佳干燥条件.
The lignite drying process of a 600 MW oxy-fuel combustion power plant was simulated by Aspen Plus software.The effect on drying characteristics of drying medium,temperature,flow rate and the concentration of CO2 and H2O in flue gas were investigated.The simulation results show that the flue gas of oxy-fuel combustion is suitable for lignite drying.CO2 in the flue gas can effectively prevent spontaneous combustion of lignite which make drying process more safety;CO2can increase the drying capacity of flue gas,while H2 O in the flue gas will inhibit evaporation of moisture in the coal;the increase of drying temperature and flow rate will accelerate lignite drying to achieve the requirements,while effect of the drying temperature is more obvious.According to the simulating results,temperature of 150℃ and flow rate of 1.4×10^6m3/h are the best drying conditions for the 600 MW oxy-fuel combustion power plant.
出处
《煤炭转化》
CAS
CSCD
北大核心
2014年第3期38-41,54,共5页
Coal Conversion
基金
国家自然科学基金联合基金培育项目(U1361120)
