循环流化床吸附挥发性有机化合物的实验研究
文献类型：学位论文
| 作者 | 段文立 |
| 学位类别 | 硕士 |
| 答辩日期 | 2003 |
| 授予单位 | 中国科学院过程工程研究所 |
| 授予地点 | 中国科学院过程工程研究所 |
| 导师 | 宋文立 |
| 关键词 | 循环流化床 吸附 吸附效率 传质系数 |
| 其他题名 | Experimental Study on VOCs Adsorption in Circulating Fluidized Bed |
| 学位专业 | 化学工艺 |
| 中文摘要 | 该文设计了一个两级循环流化床吸附反应器,以甲苯为吸附质、Ambersorb600为吸附剂,应用MiniRAEPGM-7600VOC检测仪在此吸附器上进行了吸附实验研究.得到两级循环流化床的压力和空隙率分布以及吸附质浓度沿床高的轴向分布.分析了气体进口浓度、表观气速和吸附剂贮料量对吸附过程的影响.通过实验研究和分析得出以下结论:(1)两级循环流化床可实现吸附剂和吸附质的整体逆流操作,实验条件下全床吸附率为95～98%.(2)吸附质进口浓度和进气量(表观气速)会改变吸附质浓度沿床高的分布情况,但对整体吸附效率影响不大.(3)增加吸附段的贮料量可以提高吸附效率.(4)建立的循环流化床吸附模型可以描述吸附质浓度随床高的变化情况.(5)根据实验结果求出了气相传质单元高度和气相总推动力传质系数. |
| 英文摘要 | Volatile Organic Compounds (VOCs) are the most common air pollutants emitted from industry and it is harmful to both environment and human health. Adsorption is one of the most effective methods for controlling VOCs and has been developed very fast these years. Circulating Fluidized Bed (CFB) is more and more widely used in various industrial applications due to its advantages, including high heat and mass transfer rate and continuous operation. VOCs Adsorption with CFB has great potential in VOCs emission control, but has not been well studied until now. A two-stage CFB adsorber has been developed for VOCs adsorption. Experimental research was conducted with Ambersorb 600 as adsorbent and toluene as adsorbate. MiniRAE PGM-7600, a type of photo-ionization detector, was used to measure and record the toluene concentrations. The pressure drop, voidage distribution and axial concentration distribution of adsorbate along the CFB riser are obtained. The influence of inlet toluene concentration, air flux and adsorbent inventory on the performance of the adsorber has also been discussed. The conclusions include: (1) The solid and gas are overall countercurrent flow in the two-stage circulating fluidized bed and the adsorption efficiency is between 95% and 98% under the experimental conditions.(2)Both toluene inlet concentration and air flux can affect the axial concentration distribution of adsorbate, but not the overall adsorption efficiency. (3) Large adsorbent inventory in the bed leads to higher adsorption efficiency. (4) The established adsorption model can estimate the adsorbate axial concentration distribution along the CFB riser. (5)Gas-phase mass transfer unit height and the overall gas mass transfer coefficient were obtained from the experimental results. |
| 语种 | 中文 |
| 公开日期 | 2013-09-16 |
| 页码 | 68 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/1357]  |
| 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 | 段文立. 循环流化床吸附挥发性有机化合物的实验研究[D]. 中国科学院过程工程研究所. 中国科学院过程工程研究所. 2003. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。