PDF《过程参数对采用多孔陶瓷超滤膜回收烟气中余热和水性能的影响》

CIESC Journal, year,1・ 2017-09-27 收到初稿,2018-02-05 收到修改稿.

联系人:漆虹.第一作者:孟庆莹(1991―) ,女,硕士研究生. 基金项目:国家自然科学基金项目(21276123, 21490581) ;

国家

863 计划(2012AA03A606) ;

中国石油化工股份有限公司资助项目. Received date: 2017-09-27. Corresponding author: Prof. Qi Hong,hqi@njtech.edu.cn Foundation item: supported by the National Natural Science Foundation of China (21276123, 21490581), the National High Technology Research and Development Program of China (2012AA03A606) and China Petroleum &

Chemical Corporation. 化工学报 ****年第**卷第*期|www.hgxb.com.cn DOI: 10.11949/j.issn.0438-1157.20171295 过程参数对采用多孔陶瓷超滤膜回收烟气中余热和水性能的影响 孟庆莹

1 ,曹语

1 ,黄延召

2 ,王乐

3 ,李丽

1 ,牛淑锋

1 ,漆虹

1 (1 南京工业大学膜科学技术研究所,材料化学工程国家重点实验室,江苏 南京 210009;

2 中石化炼化工程(集团)股份 有限公司洛阳技术研发中心,河南 洛阳 471003;

3 中国石油化工股份有限公司科技部,北京 100728) 摘要:将孔径为

20 nm 的陶瓷膜组装制成膜冷凝器,在水蒸汽-空气形成的模拟体系中,采用去离子水作为冷却 介质,开展了传递膜冷凝技术在烟气除湿和工业余热综合应用方面的研究.考察了空气流量、冷却水流量、进 气温度和冷却水温度对陶瓷内膜和外膜过程通量的影响,并比较了两者水热回收性能.结果表明,过程通量均 随进气流量和进气温度的增大而增加.随着冷却水流量的增大,过程通量也不断增加,但是冷却水流量达到一 定值后,过程通量基本不再变化.冷却水温度对过程水通量的影响较小,但是热通量对冷却水温度的改变较敏 感.冷却水流量的变化对陶瓷外膜的过程通量影响更加显著,表明陶瓷外膜水热回收过程更易受流体边界层的 影响.在各实验工况范围内,陶瓷内膜和外膜分别具有更高的热通量和水通量,本文采用陶瓷膜过程的水通量 和热通量最高分别可达到 23.1 kg・ m-2 ・ h-1 和47.5 MJ・ m-2 ・ h-1 .随着传递膜冷凝技术开发和研究的不断深入,该技 术在除湿和工业余热综合应用领域有着广阔的发展空间,将为我国节水、节能以及环境保护等领域的发展提供 新的解决思路. 关键词:陶瓷膜;

烟气水分回收;

余热回收;

传递膜冷凝技术;

烟羽 中图分类号:TQ 174.9 文献标志码:A 文章编号:0438-1157(2017)00-0000-00 Effects of process parameters on water and waste heat recovery from flue gas using ceramic ultrafiltration membranes Meng Qingying1 , Cao Yu1 , Huang Yanzhao2 , Wang Le3 , Li Li1 , Niu Shufeng1 , Qi Hong1 (1 Membrane Science and Technology Research Center, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China;

2 Luoyang R&

D Center of Technology Sinopec Engineering (Group) Co., Ltd., Luoyang 471003, Henan, China;

3 China Petroleum &

Chemical Corporation Technology Department, Beijing 100728, China) Abstract: A membrane condenser was established by using tubular ceramic membranes with a separation layer of

20 nm in pore size, which are coated on the inner/outer-side of the tube (IM/OM), respectively. Experiments of water and heat recovery from simulated flue gas were conducted using deionized water as coolant. Effects of air flow rate, cooling-water flow rate, inlet gas temperature and inlet water temperature on mass and heat 研究论文 ・ 2・ 化工学报第*卷transfer across the IM and OM were investigated. Results showed that both water and heat fluxes of IM and OM increased as the increment of the air flow rate and inlet gas temperature. Water and heat fluxes of both IM and OM increased as the cooling-water flow rate elevated, while this tendency of variation was not remarkable when the cooling-water flow rate reached a certain value. Reducing the inlet water temperature effectively enhanced heat fluxes of IM and OM, but had little effect on water fluxes. The influence of coolant water flow rate on water and heat fluxes of OM is more significant, indicating that mass and heat transfer across the OM was more susceptible to the boundary layers effect. Compared with the IM,the OM exhibited much higher water fluxes and lower heat fluxes. In this work, water and heat fluxes of ceramic membranes were up to 23.1 kg・ m-2 ・ h-1 and 47.5 MJ・ m-2 ・ h-1 , respectively. With the development of the TMC, it has broad application in dehumidification and utilizing industrial waste heat. This technology will also bring new ideas in many fields such as energy and water conservation and environmental protection. Key words: ceramic membranes;