烧结矿余热回收竖罐热工参数确定方法及其应用
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摘要
烧结矿余热回收竖罐热工参数的确定是保证竖罐式余热回收技术工程化实施效果的关键因素之一。针对烧结矿余热回收装置热工参数研究不足的问题,提出了以罐体出口热载体焓为判据的竖罐热工参数确定方法;以某年产260万t烧结机为实例,采用解析计算方法确定了竖罐适宜热工参数。热工参数确定的核心在于,首先确定竖罐热工参数范围,进而采用正交试验获得适宜热工参数组合。以单罐为例,计算实例的气固水当量比为1.06,冷却段直径为9.0 m,冷却段高径比为1.0,出口热载体焓为21.33 MW。
The determination of thermal parameters of the vertical tank for the sinter waste heat recovery is one of the key factors to ensure the engineering implementation of the vertical tank waste heat recovery technology. The insufficient research on the determination of thermal parameters of the sinter waste heat recovery equipment was focused on,and a determination method of thermal parameters of the vertical tank was proposed based on the enthalpy exergy of the outlet heat carrier. With a domestic 2.6 million t/a sintering machine as a research object,suitable thermal parameters of the vertical tank were obtained through the analytical calculation method. The main process of the determination of thermal parameters is summarized as following:Ranges of thermal parameters meet the temperature requirements of the vertical tank process are determined firstly,and the orthogonal test is designed to obtain suitable thermal parameters of the vertical tank. Based on the single tank,thermal parameters of calculation example are that the gas-solid water equivalent is 1.06,the cooling section diameter is 9.0 m,the height diameter ratio is 1.0,and the enthalpy exergy of the outlet heat carrier is 21.33 MW.
The determination of thermal parameters of the vertical tank for the sinter waste heat recovery is one of the key factors to ensure the engineering implementation of the vertical tank waste heat recovery technology. The insufficient research on the determination of thermal parameters of the sinter waste heat recovery equipment was focused on,and a determination method of thermal parameters of the vertical tank was proposed based on the enthalpy exergy of the outlet heat carrier. With a domestic 2.6 million t/a sintering machine as a research object,suitable thermal parameters of the vertical tank were obtained through the analytical calculation method. The main process of the determination of thermal parameters is summarized as following:Ranges of thermal parameters meet the temperature requirements of the vertical tank process are determined firstly,and the orthogonal test is designed to obtain suitable thermal parameters of the vertical tank. Based on the single tank,thermal parameters of calculation example are that the gas-solid water equivalent is 1.06,the cooling section diameter is 9.0 m,the height diameter ratio is 1.0,and the enthalpy exergy of the outlet heat carrier is 21.33 MW.
引文
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[9] FENG Jun-sheng,DONG Hui,GAO Jian-ye,et al. Theoretical and experimental investigation onvertical tank technology for sinter waste heat recovery[J]. Journal of Central South University:Science and Technology,2017,24(10):2281.
[10]孙用军,董辉,冯军胜,等.烧结-冷却-余热回收系统热力学分析[J].钢铁研究学报,2015,27(1):16.(SUN Yong-jun,DONG Hui,FENG Jun-sheng,et al. Thermodynamic analysis of waste heat recovery for sinter-cooling system[J]. Journal of Iron and Steel Research,2015,27(1):16.)
[11]高建业,刘一伟,冯军胜,等.烧结矿余热回收中试竖罐结构和操作参数解析[J].钢铁研究学报,2017,29(1):13.(GAO Jian-ye,LIU Yi-wei,FENG Jun-sheng,et al. Analytical research on cooling section height and cooling air flow of vertical tank for sinter waste heat recovery[J]. Journal of Iron and Steel Research,2017,29(1):13.)
[12]傅秦生.能量系统的热力学分析方法[M].西安:西安交通大学出版社,2005.(FU Qin-sheng,Thermodynamic Analysis of Energy System[M]. Xi′an:Xi′an Jiaotong University Press,2005.)
[13]赵梦然,杜梅芳,陈时选,等.基于?分析方法对烧结冷却系统余能利用[J].钢铁,2018,53(7):89.(ZHAO Meng-ran,DU Mei-fang,CHEN Shi-xuan,et al. Utilization of remaining exergy of sintering cooling system based on exergy analysis method[J]. Iron and Steel,2018,53(7):89.)
[14]张晟,冯军胜,董辉.基于热载体焓?为判据的环冷机热工参数仿真优化[J].化工学报,2017,68(11):4129.(ZHANG Sheng,FENG Jun-sheng,DONG Hui. Simulation and optimization of thermal parameter of sinter annular cooler based on enthalpy exergy of heat carrier[J]. Journal of Chemical Industry and Engineering,2017,68(11):4129.)
[15] FENG Jun-sheng,DONG Hui,GAO Jian-ye,et al. Exergy transfer characteristics of gas-solid heat transfer through sinter bed layer in vertical tank[J]. Energy,2016,111:154.
[16]李明明.烧结矿余热回收竖罐结构及热工参数研究[D].沈阳:东北大学,2014.(LING Ming-ming. Study on Structure and Thermal Parameters of Vertical Tank for Recovering Sinter Waste Heat[D]. Shenyang:Northeastern University,2014.)
[17]冯军胜,董辉,梁凯,等.烧结矿余热回收竖罐内气固传热特性[J].化工学报,2015,66(11):4418.(FENG Jun-sheng,DONG Hui,LIANG Kai,et al. Gas-solid heat transfer characteristics in vertical tank for sinter waste heat recovery[J]. Journal of Chemical Industry and Engineering,2015,66(11):4418.)
[18]杨世铭,陶文铨.传热学[M].北京:高等教育出版社,2008.(YANG Shi-ming,TAO Wen-quan. Heat Transfer[M]. Beijing:Higher Education Press,2008.)
[2]董辉,李磊,刘文军,等.烧结余热竖罐式回收利用工艺流程[J].中国冶金,2012,22(1):6.(DONG Hui,LI Lei,LIU Wenjun,et al. Process of waste heat recovery and utilization for sinter in vertical tank[J]. China Metallurgy,2012,22(1):6.)
[3]董辉,王爱华,冯军胜,等.烧结过程余热资源回收利用技术进步与展望[J].钢铁,2014,49(9):1.(DONG Hui,WANG Aihua,FENG Jun-sheng,et al. Progress and prospect in sintering waste heat resource recovery and utilization technology[J]. Iron and Steel,2014,49(9):1.)
[4]路俊萍,王世均.国内首创烧结竖冷窑及显热回收发电工艺技术及成套设备[EB/OL].(2017-04-20)[2018-04-12]. http://www.sohu. com/a/135358304_313737.(LU Jun-ping,WANG Shi-jun. Technology and equipment of China's first sintering vertical kiln and sensible heat recovery power generation[EB/OL].(2017-04-20)[2018-04-12]. http://www.sohu. com/a/135358304_313737.)
[5]陆钟武.火焰炉[M].北京:冶金工业出版社,1995.(LU Zhong-wu. Flame Furnace[M]. Beijing:Metallurgical Industry Press,1995.)
[6] FENG Jun-sheng,DONG Hui,LIU Jing-yu,et al. Experimental study of gas flow characteristics in vertical tank for sinter waste heat recovery[J]. Applied Thermal Engineering,2015,91:73.
[7] FENG Jun-sheng,DONG Hui,GAO Jian-ye,et al. Numerical investigation of gas-solid heat-transfer process in vertical tank for sinter waste heat recovery[J]. Applied Thermal Engineering,2016,107:135.
[8] FENG Jun-sheng,DONG Hui,GAO Jian-ye,et al. Experimental study of gas-solid overall heat transfer coefficient in vertical tank for sinter waste heat recovery[J]. Applied Thermal Engineering,2016,95:136.
[9] FENG Jun-sheng,DONG Hui,GAO Jian-ye,et al. Theoretical and experimental investigation onvertical tank technology for sinter waste heat recovery[J]. Journal of Central South University:Science and Technology,2017,24(10):2281.
[10]孙用军,董辉,冯军胜,等.烧结-冷却-余热回收系统热力学分析[J].钢铁研究学报,2015,27(1):16.(SUN Yong-jun,DONG Hui,FENG Jun-sheng,et al. Thermodynamic analysis of waste heat recovery for sinter-cooling system[J]. Journal of Iron and Steel Research,2015,27(1):16.)
[11]高建业,刘一伟,冯军胜,等.烧结矿余热回收中试竖罐结构和操作参数解析[J].钢铁研究学报,2017,29(1):13.(GAO Jian-ye,LIU Yi-wei,FENG Jun-sheng,et al. Analytical research on cooling section height and cooling air flow of vertical tank for sinter waste heat recovery[J]. Journal of Iron and Steel Research,2017,29(1):13.)
[12]傅秦生.能量系统的热力学分析方法[M].西安:西安交通大学出版社,2005.(FU Qin-sheng,Thermodynamic Analysis of Energy System[M]. Xi′an:Xi′an Jiaotong University Press,2005.)
[13]赵梦然,杜梅芳,陈时选,等.基于?分析方法对烧结冷却系统余能利用[J].钢铁,2018,53(7):89.(ZHAO Meng-ran,DU Mei-fang,CHEN Shi-xuan,et al. Utilization of remaining exergy of sintering cooling system based on exergy analysis method[J]. Iron and Steel,2018,53(7):89.)
[14]张晟,冯军胜,董辉.基于热载体焓?为判据的环冷机热工参数仿真优化[J].化工学报,2017,68(11):4129.(ZHANG Sheng,FENG Jun-sheng,DONG Hui. Simulation and optimization of thermal parameter of sinter annular cooler based on enthalpy exergy of heat carrier[J]. Journal of Chemical Industry and Engineering,2017,68(11):4129.)
[15] FENG Jun-sheng,DONG Hui,GAO Jian-ye,et al. Exergy transfer characteristics of gas-solid heat transfer through sinter bed layer in vertical tank[J]. Energy,2016,111:154.
[16]李明明.烧结矿余热回收竖罐结构及热工参数研究[D].沈阳:东北大学,2014.(LING Ming-ming. Study on Structure and Thermal Parameters of Vertical Tank for Recovering Sinter Waste Heat[D]. Shenyang:Northeastern University,2014.)
[17]冯军胜,董辉,梁凯,等.烧结矿余热回收竖罐内气固传热特性[J].化工学报,2015,66(11):4418.(FENG Jun-sheng,DONG Hui,LIANG Kai,et al. Gas-solid heat transfer characteristics in vertical tank for sinter waste heat recovery[J]. Journal of Chemical Industry and Engineering,2015,66(11):4418.)
[18]杨世铭,陶文铨.传热学[M].北京:高等教育出版社,2008.(YANG Shi-ming,TAO Wen-quan. Heat Transfer[M]. Beijing:Higher Education Press,2008.)