高效旋转薄膜蒸发器在亚熔盐铬盐清洁生产中的应用  

Application of Efficient Rotary Film Evaporator in Sub-molten Cleaner Production Process of Chromium Salts

作　　者：李莉[1,2,3] 王京刚[1] 曲景奎[2,3] 翟超[1,2,3] 齐涛[2,3] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]湿法冶金清洁生产技术国家工程实验室,北京100190 [3]中国科学院过程工程研究所绿色过程与工程院重点实验室,北京100190

出　　处：《有色金属（冶炼部分）》2011年第7期12-16,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(20676136);国家重点基础研究发展计划(973计划)项目(2007CB613501);"十一五"国家科技支撑计划重点项目(2006BAC02A05)

摘　　要：研究采用1 m2高效旋转薄膜蒸发器蒸发浓缩除杂净化后50%碱液的过程,考察加热温度、进料流量和真空度等参数对完成液浓度、蒸发强度和总传热系数的影响,优化工艺条件。结果表明,50%碱液以沸点进料,导热油温度在260℃以上,流量控制在0.08 m3/h,真空度保持在0.08±0.005 MPa,浓缩后的碱液浓度可达75%以上,能够满足该清洁工艺中对于循环碱液浓度的要求,经济效益显著。The concentration process of the purified alkali solution with 50% content is investigated with the use of the efficient rotary film evaporator with 1 m2 heat-transferring surface.The effects of heating temperature,feed flow rate and vacuum on the completed solution concentration,evaporation intensity and total heat transfer coefficient are examined,and the process conditions are optimized.The results indicate that the concentration of the concentrated alkali solution reaches to more than 75% under the condition of boiling point feed-in,above 260 ℃ of the heat transfer-oil,0.080±0.005 MPa vacuum and 0.08 m3/h flux.It can meet the concentration demands of recycling alkali solution in sub-molten cleaner production process of chromium salts,and with great economic benefits.

关 键 词：冶金技术 高效旋转薄膜蒸发器 碱液增浓 蒸发强度 传热效率 

分 类 号：TQ115[化学工程—无机化工]