摘要
为明确影响竖罐余热回收效果的主要参数及其规律,建立基于床层颗粒下移运动的气固逆流床气固非平衡双能量方程,通过MATLAB编写基于Runge-Kutta方法求解的计算程序,并通过小试实验装置验证该方法的可靠性,提出以出口气体净?作为评价竖罐余热回收效果的指标;以某年产370万t烧结机为例,计算不同工况下所需竖罐冷却段高度、罐体内的温度分布以及压降,在此基础上,对3个关键热工参数的灵敏度进行分析。研究结果表明:随烧结矿冷却温度、冷却气体进口速度及冷却段直径增加,竖罐所需冷却段高度均逐渐降低;冷却段直径对冷却段高度的影响程度较大;冷却气体进口速度对出口气体净?有明显影响,冷却段直径的影响次之,烧结矿冷却温度对净?影响较小。
To clarify the main parameters and laws affecting the recovery effect of the vertical cooler, based on the downward movement of bed particles, the non-equilibrium dual energy equation of gas-solid countercurrent bed was established. A calculation program based on the Runge-Kutta method was written by MATLAB, and the reliability of the method was verified by a small-scale experimental device. The net exergy of outlet gas was proposed as an index to evaluate the efficiency of waste heat recovery of vertical cooler. A sintering machine with an annual output of 3.7 million tons was taken as the research object. The required height of the cooling section,the temperature distribution in the cooler and the pressure drop under different working conditions were calculated, and the parameter sensitivity analysis was carried out on this basis. The results show that with the increase of sinter cooling temperature, cooling air inlet speed and cooling section diameter, the required cooling section height of the vertical cooler is gradually reduced. The cooling section diameter has the greaterst influence on the cooling section height. The cooling air inlet speed has a significant effect on the outlet gas net exergy,followed by the diameter of the cooling section, and the sinter cooling temperature has smaller effect on the net exergy.
作者
张晟
赵亮
冯军胜
董辉
ZHANG Sheng;ZHAO Liang;FENG Junsheng;DONG Hui(School of Metallurgy,Northeastern University,Shenyang 110819,China;School of Environment and Energy Engineering,Anhui Jianzhu University,Hefei 230601,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第10期3748-3759,共12页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51974087,51904074)
辽宁兴辽人才计划项目(XLYC1802122)
辽宁省重点研发计划项目(2019JH2/10100007)。
关键词
烧结矿
余热
竖罐
逆流移动床
sinter
waste heat
vertical cooler
countercurrent moving bed
exergy
