A hybrid compartmental-CFD model to investigate forced circulation crystallizer performance

Darand, Jamal; Jafarian, Ali; Tizbin, Shahriar

doi:10.1016/j.desal.2022.115743

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…In this study, the shell and tube heat exchanger of the falling film evaporator is operated in a manner where the thin liquid film flows down the inner wall of the tube due to gravity . For the forced circulation evaporator, a typical vertical shell and tube heat exchanger was applied, where the process liquid or slurry was pumped from the bottom to the top on the tube side . Several methods can be applied for the modeling of the preheater, but in this study, a conventional shell and tube heat exchanger, similar to the forced circulation evaporator, was adopted.…”

Section: Methodsmentioning

confidence: 99%

“…44 For the forced circulation evaporator, a typical vertical shell and tube heat exchanger was applied, where the process liquid or slurry was pumped from the bottom to the top on the tube side. 46 Several methods can be applied for the modeling of the preheater, but in this study, a conventional shell and tube heat exchanger, similar to the forced circulation evaporator, was adopted. Steam or vapor is injected on the shell side of all heat exchangers, generating heat through condensation.…”

Section: Integrated Process Of Evaporation Andmentioning

confidence: 99%

“…Therefore, evaporation is conducted only until the concentration of the process liquid reaches maximum solubility without being crystallized. On the other contrary, forced circulation evaporators can handle crystallization with reduced fouling. , However, forced circulation evaporators have lower evaporation rate and higher CAPEX compared with falling film evaporators . In addition, fewer effects are sometimes preferred to precisely control temperature and concentration for crystallization, despite economic inefficiency, because crystallization requires very precise control of purity, particle size, and morphology.…”

Section: Introductionmentioning

confidence: 99%

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Operational Strategy of Reconfigurable Multi-Effect Evaporation Processes for Bio-Based Amino Acid Production

Kim,

Park,

Park

et al. 2024

Ind. Eng. Chem. Res.

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The techno-economic impact of implementing a reconfigurable system in the integrated process was investigated, when L-threonine and L-valine were coproduced with a 5-effect preheater-integrated feed-forward evaporator, followed by singlestage evaporative crystallizers. A superstructure-based modeling and simulation framework was developed to consider all possible multieffect evaporator configurations. Evaporative capacity constrained by solubility limitations and fluid scaling was rigorously examined, providing the knowledge to select the most appropriate configuration and minimize steam consumption without compromising productivity. For L-threonine production, the 4−5−3− 2−1 sequence with a preheater showed the highest energy efficiency, with a maximum reduction of 8.4% in steam usage compared to the standard condition. For L-valine production, the 5−4−3−2−1 sequence without a preheater was most energyefficient, showing a maximum reduction of 7.3% in steam usage compared to the standard condition. These results clearly illustrate the agility of the reconfigurable multieffect evaporation system under various uncertain operational factors.

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Section: Methodsmentioning

confidence: 99%

Section: Integrated Process Of Evaporation Andmentioning

confidence: 99%