烧结余热罐式回收系统的基础研究

项目名称： 烧结余热罐式回收系统的基础研究

项目编号： No.51274065

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 董辉

作者单位： 东北大学

项目金额： 80万元

中文摘要： 针对传统带式冷却机在余热回收利用方面存在着漏风率较高、余热部分回收等先天不足，借鉴干熄焦结构和工艺，结合烧结矿所携带余热数量较大、品质居中的特点，提出罐式回收工艺流程。罐式回收是否可行主要决定于床层阻力特性、气固传热特性以及烧结矿冷却速度对其冶金和机械性能影响3个基本问题，其中，阻力特性和气固传热两个问题的科学支撑是固定床气固流动与传热。将化工等领域中各种固定床层的反应、传质等"特性"去除，结合余热回收罐体内床层介于疏床与密床之间、几何因子较大、颗粒尺寸范围广及形状因子较小等特点，将化工等领域中的有关固定床流动与传热的基础和前沿理论应用于余热回收罐体床层中，借鉴吸收再创新。在此基础上，开展着眼于罐体和整个余热回收系统的2个三类变量关系的研究，藉此确定余热回收系统工艺参数。本项目旨在于实现罐式回收从理念到理论的跨越，引起相关人士的共鸣和支持，从而为烧结余热高效回收与利用探索一条新的途径。

中文关键词： 烧结；余热回收；固定/移动床；传热；流动

英文摘要： For the disadvantages of the traditional strand cooler such as the higher rate of air leakage, the lower recovery rate of waste heat, etc, the process of the sinter waste heat recovery with vertical tank was put forward by imitating the structure and process of coke dry quenching and integrating the characteristics of sinter waste heat which is large quantity and medium quality. The feasibility of the recovery system with vertical tank mainly depends on the following 3 fundamental problems, resistance characteristics of the layer, the gas-solid heat transfer characteristics and the effect of cooling velocity for the metallurgical and mechanical properties. Among of them, the scientific evidence or support of the former 2 problems is the theories of flow and heat transfer in fixed beds. Through neglecting the "characteristics" of reaction, mass transfer and etc in the fixed bed of chemical and other fields and integrating the characteristics in vertical tank that the bed of vertical tank is between random close packing and random loose packing ,the geometrical factor is larger, the range of particle size is wider, the shape factor is smaller and etc, the foundation and frontier theory of flow and heat transfer of fixed bed in the chemical field are absorbed and innovated to apply in the bed layer of vertical tan

英文关键词： sinter；waste heat recovery；fixed/moving bed；heat transfer；fluid flow