The ASPEN discussion forum has been very inactive these past two days; I’ll post a question to liven things up
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Simulation of the ammonium sulfate production section in a coking plant: The NH3 in raw gas is absorbed in a spray-type saturator; the ammonia vapor from the ammonia evaporation tower also enters this saturator. A crystallization pump transfers the material from the lower part of the saturator together with the mother liquor to the crystallization tank, where centrifugal separation and fluidized bed drying take place. Questions: 1. For the simulation of the saturator, which module should be used, given that the saturator involves both reaction and crystallization processes? Should the reactions and modules be set up separately? 2. Regarding crystallization, the mother liquor contains H2SO4, NH4HSO4, and (NH4)2SO4; how should the solubility data be processed and entered? 3. Is the method for selecting electrolyte properties reasonable? Regarding this section, if any interested users have other questions or ideas, I hope we can discuss them here. This post was last edited by lujianfei79 on 2009-3-29 at 22:38.]
Ah, no one is paying attention; I’ll have to handle it myself then :)
First of all, thanks to the original poster for their strong support of our Haichuan Forum; upvote~~! ! ! ! Although I have not specifically carried out simulations for that particular operating condition, I am currently working on simulations of industrial flue gas desulfurization systems. The principle involved is the reaction Caco3 + SO2 + H2O → Caso4*2H2O +..., and this process also involves issues such as dissolution reactions and crystallization. My approach for material properties is the electrolyte model; I don’t think it’s necessary to input the solubility parameter directly. After defining the relevant components, the key is to set the pure components in the material properties, as well as the binary interaction parameters and electrolyte equivalence parameters. . . . I use the racfrac model, and I’m also interested in what you mentioned. . . . That’s all about my situation; it’s just for reference~~!
Thank you to those on the third floor for their support and assistance; I also hope that more people will come to discuss issues related to reactions and crystallization