What changes will occur in the top and bottom temperatures of the synthesis tower when the water-to-carbon ratio is high?
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What changes will occur in the temperatures at the top and bottom of the synthesis tower if the water-to-carbon ratio is high? (Ammonia stripping. All other conditions remain unchanged)
With a high water-to-carbon ratio, the temperature at the bottom of the synthesis tower rises, while the temperature at the top decreases. This is because, with the ammonia-to-carbon ratio remaining constant, increasing the water amount raises the boiling point of the material at the bottom of the tower, thereby increasing the ammonium formation reaction and the heat released, leading to an increase in the temperature at the bottom. At the same time, due to the increased ammonium methoxide reaction at the bottom of the tower, the ammonium methoxide reaction at the top of the tower decreases. So the tower top temperature drops. This post was last edited by Fan Zhou Wu Hu on 2009-4-18 01:01.]
What was said on the third floor is very accurate; to add something: a high water-to-carbon ratio is primarily indicated by an increase in the temperature at the bottom of the synthesis tower, along with a slight decrease in the temperature at the top, resulting in a smaller temperature difference between the top and bottom. This is somewhat similar to the situation where the ammonia-to-carbon ratio is low. The further difference can be determined by observing the changes in the load during separation. The water-to-carbon ratio is proportional to the desorption load. This post was last edited by lxq700918 on 2009-4-18 09:49.]
This post was last edited by Fan Zhou Wu Hu on 2009-5-3 20:04. Everyone discussed it. Among the 5 components of the synthesis mixture (CO2, NH3, UR, methylammonium, H2O), water is the component with a high boiling point; increasing the amount of water certainly raises the boiling point of the system, that is, the temperature at the bottom of the tower increases. As the amount of water increases, the conversion rate decreases. When the mixture reaches the top of the tower (after 45 minutes), the reaction temperature in the upper part of the tower drops slightly. As can be seen from the phase diagram, when the amount of urea decreases, the temperature moves toward lower values. This is for reference only.
5# YHL512777 But it also depends on the high water-to-carbon ratio; when this ratio is slightly high, the temperature at the top of the synthesis tower increases as well； If it’s extremely high, that’s the situation you’re referring to.
Let’s discuss this with moderator 1025199692: will a slightly higher water-to-carbon ratio result in a higher top temperature? Have you encountered this in actual production? Could you talk about the theoretical basis?
In practical operation, increasing the speed of the No. 1 pump when the temperature at the bottom of the synthesis tower is high reduces the temperatures at both the top and bottom.