烧结烟气循环流化床脱硫系统特性模拟研究
文献类型：学位论文
| 作者 | 颜湘华 |
| 学位类别 | 硕士 |
| 答辩日期 | 2009-05-26 |
| 授予单位 | 中国科学院过程工程研究所 |
| 授予地点 | 过程工程研究所 |
| 导师 | 朱廷钰 |
| 关键词 | Aspen Plus 烧结烟气 循环流化床 模型 流程模拟 |
| 其他题名 | Simulation Research on Characteristics of Circulating Fluidized Bed Sintering Gas Desulfurization System |
| 学位专业 | 环境工程 |
| 中文摘要 | 我国钢铁企业的烧结烟气脱硫刚刚起步，还处于实践摸索阶段，目前还缺乏成熟可靠的脱硫技术。为适应烧结行业的复杂性，采用循环流化床烟气脱硫技术为代表的半干法更为可行。本文通过建立模型和流程模拟的方式，研究应用于烧结烟气SO2治理的“内外双循环流化床烟气脱硫技术”的工艺特性。 本文基于循环流态化原理分析脱硫塔的气固流动特性，采用双膜理论分析讨论脱硫反应对传质过程的增强影响，运用惯性碰撞理论解释浆滴的形成，通过微元分析建立起循环流化床烟气脱硫的数学模型。以此为基础，开发了应用于Aspen Plus软件的Fortran用户单元模块模拟脱硫塔反应器，结合Aspen Plus自带的单元操作模块模拟脱硫工艺的其他设备，建立了内外双循环流化床烟气脱硫工艺流程模拟。通过对典型工况的模拟计算，发现计算结果和文献发表的实验数据相比，误差较小。借助Aspen Plus灵敏度分析工具，模拟研究Ca/S、增湿喷水量、塔内颗粒物浓度和水滴粒径等工艺参数对烟气出口温度、压力以及浆滴蒸发等的影响，揭示了脱硫率随这些工艺参数变化的规律。 本文建立的脱硫单元数学模型全面具体，Aspen Plus的流程模拟反映实际。本工作有助于理解烟气脱硫反应机理，更全面了解工艺参数对脱硫效果的影响，为开发适合我国国情的烧结烟气循环流化床脱硫技术提供参考。 |
| 英文摘要 | Although the development of sintering gas desulfurization of Chinese iron and steel enterprises has been beginning, it was still in the exploratory stage on the whole. At present, there was lack of mature and reliable desulfurization technique. In order to meet the complexity of the domestic sintering industry, especially for the sake of the existing site conditions and the development of integrated multi-component removal technology for sintering gas, it was advantages to apply semi-dry methods represented by circulating fluidized bed flue gas desulfurization (CFB-FGD) technology. In this paper, the mathematical model and process simulation of CFB-FGD were presented. The process characteristics of "Inside and Outside Double Circulating Fluidized Bed Flue Gas Desulfurization Technology" (IOCFB-FGD) applied in the SO2 treatment of sintering gas was studied. Based on analysis of gas-solid flow characteristics in the desulfurization tower by using circulating fluidized principle, the mathematic model of CFB-FGD that accounted for the formation of slurry droplets adopting inertia collision theory was built in the way of element analysis, in which the enhancement of desulfurization reaction in the process of mass transfer was conducted with the double-membrance theory and mass transfer theory. Followed the mathematic model, a user unit module was programmed for Aspen Plus software to simulate desulfurization tower. The process simulation of IOCFB-FGD was established with the user module and the built-in unit operation modules of Aspen Plus that simulate other desulfurization equipments. It was found that calculated results and the related experimental data reported in the literatures are basically in accordance. With Aspen Plus sensitivity analysis tools, simulation study of the process parameters, such as Ca/S, the flux of water spray, concentration of sorbent particles and droplet size, which impacted the temperature and pressure of flue gas, droplet evaporation and so on, revealed the laws that desulfurization efficiency changed with these process parameters. The mathematical model of CFB-FGD was specific and comprehensive in this paper, where Aspen Plus process simulation could reflect the actual situation. It was good to understand the reaction mechanism of flue gas desulfurization and to get a more comprehensive understanding of the effect of process parameters on desulfurization. This work would provide reference to develop the sintering gas CFB-FGD suitable for Chinese national conditions. |
| 语种 | 中文 |
| 公开日期 | 2013-09-16 |
| 页码 | 101 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/1305]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 | 颜湘华. 烧结烟气循环流化床脱硫系统特性模拟研究[D]. 过程工程研究所. 中国科学院过程工程研究所. 2009. |
入库方式： OAI收割
来源：过程工程研究所
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