【Q&A Question 234】2018.08.28
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【Q&A Question 234】August 28, 2018: Briefly explain the relationship between the side stream withdrawal rate and the side stream temperature during the normal operation of a fractional distillation column The side stream extraction temperature is directly proportional to the amount of side stream extracted. An unreasonable or unstable amount of side stream extraction can affect the operation of the entire distillation column; therefore, the extraction amount should be stabilized based on the quality requirements of the product, with adjustments made infrequently and in small increments. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
With all other conditions unchanged, as extraction increases, the temperature at the extraction outlet rises
The side stream withdrawal temperature is directly proportional to the amount of side stream withdrawn. An unreasonable or unstable amount of side stream withdrawal can affect the operation of the entire distillation column; therefore, the withdrawal amount should be stabilized based on the quality requirements of the product, with adjustments made infrequently and in small increments.
The side stream withdrawal temperature is directly proportional to the amount of side stream withdrawn; an unreasonable or unstable amount of side stream withdrawal will affect the operation of the entire distillation column
The side-line extraction temperature is directly proportional to the amount of side-line extraction. An unreasonable or unstable amount of material taken from the side line during operation will affect the functioning of the entire distillation tower. It is necessary to maintain a stable extraction rate, depending on the quality of the product; adjustments should not be made too frequently, and the magnitude of such changes should not be large.
The side-line extraction temperature is directly proportional to the amount of side-line extraction. An unreasonable or unstable amount of material taken from the side line during operation will affect the performance of the entire distillation tower
The side-line withdrawal temperature is directly proportional to the amount of side-line withdrawn.
Answer: The side-stream withdrawal temperature is directly proportional to the amount of side stream withdrawn. An unreasonable or unstable amount of side stream withdrawal can affect the operation of the entire distillation tower. It is necessary to stabilize the withdrawal amount based on the quality of the product; adjustments should not be made too frequently, and the magnitude of changes should not be large.
The side stream extraction temperature is directly proportional to the amount of side stream extracted. An unreasonable or unstable amount of side stream extraction can affect the operation of the entire distillation column; therefore, the extraction amount should be stabilized based on the quality requirements of the product, with adjustments made infrequently and in small increments.
The side-line extraction temperature is directly proportional to the amount of side-line extraction. An unreasonable or unstable amount of material taken from the side line during operation will affect the functioning of the entire distillation tower. It is necessary to maintain a stable extraction rate, depending on the quality of the product; adjustments should not be made too frequently, and the magnitude of such changes should not be large.
The greater the extraction rate, the lower the internal reflux flow rate, which in turn reduces heat and mass transfer in the tray sections below the extraction point. Heat then rises directly upward, causing the side stream temperature to increase. Conversely, an increased internal reflux flow rate leads to improved heat and mass transfer in the tray sections below the extraction point, resulting in a decrease in the side stream temperature.