列管式水冷设备自动防垢高效强化技术  

Technique of Automatic Fouling Prevention and Heat Transfer Enhancement for Shell-tube Water-cooled Condensers

作　　者：俞天兰[1] 彭德其[1] 刘跃平[1] 罗健康[1] 

机构地区：[1]株洲工学院帅科机械清洗研究所,湖南株洲412008

出　　处：《冷饮与速冻食品工业》2004年第2期27-29,34,共4页Beverage & Fast Frozen Food Industry

基　　金：湖南省自然科学基金资助项目(编号02JJY2070).

摘　　要：电动式水冷机组冷凝器的管内冷却水流速较低,易结垢,运行效率普遍低下。现有的塑料光滑扭带由于自转清洗力矩弱,不能直接用于自动清洗。研制了一种高效强化传热,能够在0.5m/s以上的较低流速下自动清洗污垢的斜齿扭带,其原理是在光滑扭带的双面上等距离排列斜齿,被斜齿导向的传热流体对斜齿的反作用力形成一个新增的旋转力矩。与现有的光滑扭带相比,弧线形斜齿扭带自转清洗力矩增大了75%～101%,传热系数提高了71%。虽然阻力系数较高,但是设备的总阻力仍然在一般工程容许的范围内,对冷饮冷冻行业的节能增效具有较高的推广价值。The fouling, easily to be formed in water-cooled condensers when the flow velocity is slow, generally leads to lower operation efficiency of the equipment. The twisted tape inserts currently used can't be applied directly in fouling auto-prevention due to its weak self-rotating force moment. A new type of twisted tape with oblique teeth was developed to auto-prevent fouling below a velocity of 0.5 m/s. Compared with current bevel tache, the moment of auto-prevent fouling and diathermanous coefficient increased by 75%～101% and 71% respectively. Despite of high resistance coefficient, the total resistance of the equipment is in the allowable range of freezing industries.

关 键 词：列管式水冷设备 冷凝器 自动清洗技术 强化传热 塑料光滑扭带 冷饮 

分 类 号：TS277[轻工技术与工程—农产品加工及贮藏工程]