摘要
从生物质的热解原理出发,以木屑为原料,使用热重分析方法研究了木屑的热解特性,并基于能量平衡对热态铜渣耦合生物质余热利用系统进行热力学分析。根据实验结果,木屑在热解终温分别为400、500、600、700、800℃时热解需热量分别为335、373、430、513、643 k J/kg。随着热解温度的升高,铜渣余热利用率逐渐增加,在800℃的热解温度下,铜渣余热利用率达86.78%。1 250℃的铜渣冷却至常温余热量达1 574.26 k J/kg,在热态铜渣耦合木屑反应体系中,气化1 kg的木屑只需1.92 kg的铜渣,系统的热损失为37.07%,能量转化率达69.46%,可产生热值为13 319 k J的可燃气。针对铜渣富含碱金属并含有大量余热的特点,铜渣耦合生物质制备可燃气具有很大的工业应用前景。
Based on the pyrolysis principle of biomass,this paper elaborated the pyrolysis characteristics of sawdust using thermogravimetric analyzer. The heat required of sawdust pyrolysis were 335,373,430,513,643 k J/kg when the final pyrolysis temperature were400,500,600,700,800 ℃ respectively. As the pyrolysis temperature,the waste heat utilization of copper slag was increased. At pyrolysis temperature of 800 ℃,the waste heat utilization rate of copper slag was 86.78%. The waste heat of copper slag at 1 250 ℃ was 1 574.26 k J/kg when the final temperature was 25 ℃. In the reaction system of sawdust gasification with hot copper slag,1 kg of sawdust was gasified by calories of 1.92 kg hot copper slag,which could produce combustible gas with 13 319 k J of heat value. The heat loss of this system was37.07% but the energy conversion rate was 69.46%. For the characteristics of copper slag riched in alkali metals and contained a lot of waste heat,the producing of fuel gas with biomass coupled copper slag had great prospects for industrial applications.
作者
许焕斌
胡建杭
刘慧利
李昂
靳李富
刘继磊
XU Huanbin HU Jianhang LIU Huili LI Ang JIN Lifu LIU Jilei(State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Chin)
出处
《工业加热》
CAS
2016年第6期9-12,共4页
Industrial Heating
基金
国家自然科学基金(51376085)
973计划前期研究专项(2014CB460605)
关键词
木屑
热解
热态铜渣
余热利用
sawdust
pyrolysis
hot copper slag
waste heat recovery
