百公斤级烧结余热冷却炉结构和操作参数优化
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摘要
为了确定和优化一台处理量为100 kg/h竖罐式冷却炉最优结构和操作参数,在分析竖罐冷却段内的气固传热过程后,根据竖罐内气固换热的特征数关联式给出竖罐内的气固传热计算步骤。在此基础上确定影响罐体内冷却过程的结构和操作参数,主要包括冷却段的高度、冷却段的直径、冷却风进口温度和冷却风流量,并依次分析了各影响参数对冷却过程的影响规律和出口参数即冷却风出口温度、烧结矿出口温度、出口冷却风所携带的值及料层阻力损失的变化规律。利用正交分析法确定其适宜的结构参数和操作参数组合。经计算分析可知,对一台处理量为100 kg/h的竖罐炉,要使烧结矿温度、冷却风温度达到要求时,最佳的结构参数和操作参数是冷却段高度为1.4 m,直径12.2 cm,冷却风的表观流速为3.0 m/s,冷却风进口温度40℃。
In order to determine and optimize the optimal structure and operating parameters of a vertical tank cooling furnace with a processing capacity of 100 kg/h,after analyzing the gas-solid heat transfer process inside the vertical tank cooling zone,according to the characteristics of several correlations of the gas-solid heat transfer inside the vertical tank,the calculation procedures of the gas-solid heat transfer inside the vertical tank were provided.On this base,the structure and operating parameters which influenced the cooling process inside the tank were found out,mainly including height of the cooling zone,diameter of the cooling zone,inlet temperature of the cooling air,and flow of the cooling air.The influence regularity that each influence parameter had on the cooling process,and outlet parameter i.e.outlet temperature of the cooling air,outlet temperature of the sintering ore,exergy value that outlet cooling air carries,and the changing rules of the loss of the material layer resistance was analyzed in sequence.By using the orthogonality analysis method,the proper combination of the structure parameter and the operating parameter inside the vertical furnace were confirmed.After the computational calculation,it was known that in the vertical furnace which throughput was 100 kg/h,when the temperatures of the sintering ore and cooling air met the requirements,the optimum structure parameter and operating parameter were height of cooling zone 1.4 m,diameter 12.2 cm,flow velocity of cooling air 3.0 m/s,inlet temperature of cooling air inlet temperature 40 ℃.
In order to determine and optimize the optimal structure and operating parameters of a vertical tank cooling furnace with a processing capacity of 100 kg/h,after analyzing the gas-solid heat transfer process inside the vertical tank cooling zone,according to the characteristics of several correlations of the gas-solid heat transfer inside the vertical tank,the calculation procedures of the gas-solid heat transfer inside the vertical tank were provided.On this base,the structure and operating parameters which influenced the cooling process inside the tank were found out,mainly including height of the cooling zone,diameter of the cooling zone,inlet temperature of the cooling air,and flow of the cooling air.The influence regularity that each influence parameter had on the cooling process,and outlet parameter i.e.outlet temperature of the cooling air,outlet temperature of the sintering ore,exergy value that outlet cooling air carries,and the changing rules of the loss of the material layer resistance was analyzed in sequence.By using the orthogonality analysis method,the proper combination of the structure parameter and the operating parameter inside the vertical furnace were confirmed.After the computational calculation,it was known that in the vertical furnace which throughput was 100 kg/h,when the temperatures of the sintering ore and cooling air met the requirements,the optimum structure parameter and operating parameter were height of cooling zone 1.4 m,diameter 12.2 cm,flow velocity of cooling air 3.0 m/s,inlet temperature of cooling air inlet temperature 40 ℃.
引文
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[3]王萌.烧结余热竖罐式回收料层换热系数的实验研究[D].沈阳:东北大学,2012.
[4]蔡九菊,董辉.烧结过程余热资源的竖罐式回收与利用方法及其装置[P].中国专利:No.200910187381.8,2009-09-15.
[5]张浩浩.烧结余热竖罐式回收工艺流程及阻力特性研究[D].沈阳:东北大学,2011.
[6]力杰.烧结余热竖罐式回收过程传热数值计算[D].沈阳:东北大学,2011.
[7]冯妍卉,张欣欣,刘华飞,等.干熄炉内平均换热系数的研究[J].燃料与化工,2003,34(4):179-181.
[8]SUN J,CHEN M M.Atheoretical analysis of heat transfer due to particle impact[J].Internatonal Journal of Heat&Mass Transfer,1988,31(5):969-975.
[9]杨世铭,陶文栓.传热学[M].北京:高等教育出版社,2008.
[10]毕德贵,张忠孝,蔡海军,等.烧结余热发电系统的分析[J].上海理工大学学报,2012,34(5):494-498.
[11]毕德贵,张忠孝,陈明,等.烧结工序余热回收方案的热力学分析[J].热能动力工程,2013,28(3):315-319.