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Cleaning of toothpaste from process equipment by fluid flow at laboratory and pilot scales

机译：通过实验室和中试规模的流体流动从工艺设备清洁牙膏

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摘要

Cleaning studies were performed to remove toothpaste by fluid flow at different temperatures and velocities to mimic CIP (Cleaning-In-Place) processes on toothpaste coated coupons at laboratory scale and fully filled pipeline at pilot scale (different lengths and diameters). The cleaning time was reduced by increasing the velocity and temperature of the water, however no further time benefit was seen above 40°C. ududThe adhesive force for different pastes calculated from micromanipulation data followed the same trend as cleaning times on the laboratory cleaning rig. This cleaning data for the different paste formulations had a logarithmic relationship with the viscosity term from the Herschel-Bulkley rheological model. ududRemoval of toothpaste from pipes occurred by the core of the paste being removed from the centre of the pipe to leave a thin coating on the pipe wall, which was then eroded by flow. Pipes of lengths between 0.3 m and 2 m (47.7 mm diameter pipe) showed no difference in cleaning time. The rate limiting process was removal of the thin wall coating and therefore not a function of length. An inverse wall shear stress relationship with cleaning time was found to represent all the data, at all scales and under all conditions.
机译：进行了清洁研究，以通过在不同温度和速度下的流体流动来去除牙膏，以模仿实验室规模的牙膏涂层试片上的CIP（就地清洁）工艺，并在中试规模（不同的长度和直径）下完全填充管道。通过增加水的速度和温度来减少清洁时间，但是在40°C以上没有看到更多的时间益处。根据显微操作数据计算得出的不同糊剂的粘合力与实验室清洁设备上的清洁时间具有相同的趋势。不同糊剂配方的清洁数据与Herschel-Bulkley流变模型中的粘度项具有对数关系。 ud ud从管道中去除牙膏是因为将糊剂的核心从管道中心去除，从而在管道壁上留下薄薄的涂层，然后被流动腐蚀。长度在0.3 m至2 m之间的管道（直径47.7毫米的管道）在清洁时间上没有差异。速率限制过程是去除薄壁涂层，因此不是长度的函数。发现与清洗时间成反比的壁面剪应力关系代表了所有数据，无论是在任何规模上还是在所有条件下。

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    Cole Pamela Anne;

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  • 年度 2013
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  • 正文语种 English
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