Consultation on temperature difference control for towers
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What are the benefits of temperature difference control in towers? Is it more suitable for applications that require high-purity products?
Our company needs to convert 99% of the ECH into 99% using a plate tower. 99% is of first-class quality; since the concentration variation on each tray is very small, the temperature variation on each tray is also minimal. Now, let’s consider taking a few of these trays, and using the temperature difference between any two of them as an important indicator for the tower. I’m not sure if this is feasible
Reply to 2# Sleepy Mouse: Then how can we control the temperature difference between these trays? It is possible to analyze which components are responsible for the product not meeting quality standards. For example, if a component has a boiling point lower than that of the product, then a stripping tower is needed to remove the light components; if it is a heavy component, then it is necessary to control the temperature at the bottom of the tower!
This process isn’t as simple as what the original poster said. What the poster mentioned is only the basic principle of distillation. The raw material is 99% ECH, with 1% being mainly water and a small amount of DCH; it’s necessary to consider binary and ternary azeotropes in this context
I typed the wrong poster; it should be the one above. I just want to understand the applications of temperature difference control
Reply to 5# Sleepy Rat: Well, as for the control of the temperature difference between tower plates, we haven’t dealt with that yet. The temperature difference between tower plates is actually related to the composition of the materials on those two plates; controlling the operating pressure of the tower can also help to adjust the boiling points! These are all design-related issues; in practical applications, it is also necessary to consider the starting point of the problems. If there are unreasonable aspects in that regard, then there must be reasons for such irrationality. To put it simply, for a well-designed refining process, there is no such thing as a refining principle!
It can eliminate the impact of pressure fluctuations on product quality, and is generally used in distillation processes that require a very high level of product purity
In precision distillation, a very high purity of the desired product is required, and the relative volatility of the two components differs only slightly. In this way, the temperature change caused by changes in composition is much smaller than that caused by pressure changes; as a result, even slight pressure fluctuations can have significant effects. Temperature difference control is essentially temperature control after pressure compensation.