CAJ | 학술논문

应用于四氟乙烯（TFE）生产工艺的传统单弓形折流板式冷冻脱水器存在换热管径大、裂解气冷量分布不均、脱除的冰晶不能有效在脱水器中停留而随裂解气进入下级以及因折流板原因导致的壳程流动阻力大等缺点。为此本文设计了一种新型冷冻脱水器，与传统冷冻脱水器相比，采用变截面扭曲强化传热管代替光滑圆管，使冷冻脱水器管程流体沿扭曲螺旋线流动，低雷诺数下形成非对称扰流，有效破坏边界层，提高了传热效率；管内 TFE 裂解气中的水分更快冷冻并在气流离心力作用下迅速甩向管壁，凝结成冰，提高脱水效果；并且壳程改为变空间纵向流动，流动阻力低，节省材料。结合案例监测数据，与传统单弓形折流板式冷冻脱水器进行数据对比，冷冻脱水效果较原换热器提高30%。
응용우사불을희（TFE）생산공예적전통단궁형절류판식냉동탈수기존재환열관경대、렬해기랭량분포불균、탈제적빙정불능유효재탈수기중정류이수렬해기진입하급이급인절류판원인도치적각정류동조력대등결점。위차본문설계료일충신형냉동탈수기，여전통냉동탈수기상비，채용변절면뉴곡강화전열관대체광활원관，사냉동탈수기관정류체연뉴곡라선선류동，저뢰낙수하형성비대칭우류，유효파배변계층，제고료전열효솔；관내 TFE 렬해기중적수분경쾌냉동병재기류리심력작용하신속솔향관벽，응결성빙，제고탈수효과；병차각정개위변공간종향류동，류동조력저，절성재료。결합안례감측수거，여전통단궁형절류판식냉동탈수기진행수거대비，냉동탈수효과교원환열기제고30%。
Traditional baffle plate freezing dehydrator used in Tetrafluoroethylene (TFE) production industry has some defects,such as uneven distribution of cold of TFE cracking gas in large diameter tubes,low efficiency of ice crystals resident time in the dehydrator with the cracked gas into the next processes,and larege flow resistance due to baffle plate. This study designed a new freezing dehydrator in order to avoid the above defeats. Compared with traditional freezing dehydrator,this design adopted variable cross-section enhanced heat transfer tube instead of smooth tube. The tube-side fluid was able to produce strong turbulence and destroy the boundary layer effectively because of spiral flow in twist segment,which could improve the heat transfer efficiency. Water in TFE cracking gas would be quickly frozen and thrown to tube wall turning into ice by centrifugal force. Shell-side using twist tube self-supporting structure could help decrease the shell-side pressure-drop and saves materials. Based on monitoring data in one case,freeze dehydration effect was 30%higher than the original heat exchanger.