卧式喷淋降膜蒸发器内液膜流动状态及积垢分析  

Flowing state of liquid films in horizontal spraying-film evaporator and its analysis on scale fouling

作　　者：王占军[1] 周浩[2] 张华兰[2] 黄立新[1] 韩磊[1] 

机构地区：[1]中国林业科学研究院林业新技术研究所,南京210042 [2]中国林业科学研究院林产化学工业研究所,南京210042

出　　处：《中华纸业》2009年第8期46-49,共4页China Pulp & Paper Industry

基　　金：中国林业科学研究院林业新技术研究所中央级公益性科研院所基本科研业务费专项资金资助项目(CAFINT2007C15)

摘　　要：利用碱法麦草浆黑液,对卧式喷淋降膜黑液蒸发器的热传递、浓缩、黑液积垢现象进行了研究分析,发现了水平传热管外有效减少黑液积垢和提高生产效率的热边界条件。建立了湍流数学模型并对卧式喷淋降膜蒸发器水平管外黑液热传递积垢阻力情况进行了研究,这个模型可用来预测污垢的形成过程及积垢程度,分析了黑液可溶物的浓度和热边界条件对黑液的浓缩和积垢的影响。The heat transfer, concentration and scale fouling of black liquor in horizontal spraying-film evaporator were investigated with wheat straw black liquor from alkaline process and the heat boundary conditions of black liquor to effectively minimize black liquor fouling outside of the horizontal-tube and improve produc- tivity were found. A turbulent mathematical model was established to investigate the heat transfer fouling resistance of black liquor outside the horizontal-tube in horizontal spraying-film evaporator and this model of fouling can be used to predict the fouling process and the state of scale fouling of black liquor. The influence of the consistency of soluble solids and thermal boundary condition on the enrichment and scale fouling of black liquor was analyzed.

关 键 词：麦草浆黑液 卧式喷淋降膜黑液蒸发器 浓缩 积垢 数学模型 

分 类 号：TS734.8[轻工技术与工程—制浆造纸工程] X793[环境科学与工程—环境工程]