Mechanisms of Liquid and Solid Contaminant Removal from Cylindrical Tubes

摘要克莉丝汀格兰特北卡罗来纳州州立大学CTS-9500399 金属表面的结垢是化学和食品加工工业中普遍存在的问题。 结垢的传热表面由于增加的传热表面面积、能量损失、维护和由单元停机时间引起的生产损失而导致成本增加。 由于低效率的清洁导致的低产量和不合规格的生产导致大量的经济损失。 在美国，与食品和化学工业中的结垢相关的成本估计为每年18 - 29亿美元。 拟议的研究集中在两个特定的工艺领域，其中去污是一个主要问题：（1）去除高温牛奶加工过程中产生的污垢残留物（例如，无菌工艺）和（2）从不锈钢管中去除油。

ABSTRACT Christine Grant North Carolina State University CTS-9500399 The fouling of metal surfaces is a widespread problem in the chemical and food processing industries. Fouled heat transfer surfaces lead to increased costs due to added heat transfer surface area, energy losses, maintenance, and production losses caused by unit down-time. Poor yield and off-specification production due to inefficient cleaning results in substantial economic losses. In the United States the costs associated with fouling in the food and chemical industry have been estimated to be 1.8-2.9 billion dollars per year. The proposed research focuses on two specific process areas where decontamination is a major problem: (1) the removal of fouling residues generated during high temperature milk processing (e.g., aseptic processes) from stainless steel pipes and (2) the removal of oils from stainless steel tubes.