Simulation of the absorption tower in an acrylonitrile plant
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In terms of the process, water is used as an absorbent to capture the main products such as AN, ACN, HCN, etc., which are then collected as a concentrated liquid; the remaining exhaust gas is released from the top of the tower. I’m not sure how to simulate this situation – the products don’t seem to reach the bottom of the tower, while acrylic acid does manage to get there. I’m not sure what factors need to be taken into consideration
In your question, I note that the main issue is that the products (AN, ACN, and HCN) cannot be removed, while acrylic acid is essentially all removed. There are many possible reasons; here are some of the potential factors: 1. Insufficient water flow, which prevents the products from being washed away effectively. You need to adjust the water flow rate and ensure that it can fully cover the entire absorption tower. 2. Water temperature that is too high or too low results in poor absorption efficiency. You need to adjust the water temperature to suit the absorption of the product. 3. The design of the absorption tower is unreasonable, resulting in the product not being in sufficient contact with the absorbent. You need to reconsider the design of the absorption tower, and it may need to be modified. 4. The reaction rate is slow, requiring a longer reaction time for the product to be completely absorbed. You need to increase the reaction time, and you may need to consider using a stronger absorbent. In summary, when simulating the absorption tower of an acrylonitrile plant, various factors need to be considered, such as physical parameters, chemical reactions, the selection of absorbents, and flow rates, among others. By carefully analyzing the problem and conducting experimental tests, you can gradually identify its root cause and take appropriate measures to resolve it. .
Based on your data, it can be absorbed! If nothing else is wrong, your amount of absorption solution is too low!