Technical and economic analysis of an advanced multi-stage flash crystallizer for the treatment of concentrated brine

Eiff, David von; Wong, Pak Wai; Gao, Yonggang; Jeong, Sanghyun; An, Alicia Kyoungjin

doi:10.1016/j.desal.2020.114925

Cited by 22 publications

(3 citation statements)

References 23 publications

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“…Thermalbased techniques, such as distillation, operate by applying heat to saline water to induce evaporation, which is then condensed and collected as fresh water. Among these methods, multieffect distillation (MED) and multi-stage flash distillation (MSF) have emerged as the most commercially viable options [6][7][8][9]. For instance, MSF distillation consumes approximately 18 kWh/m 3 due to the substantial latent heat of evaporation required to convert water into vapour, which amounts to nearly 2500 kJ/kg [5].…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Maintaining Low and Constant Salinity in Ice During Desalination of Binary Mixtures Using Directional Solidification

Kumar,

Sarawagi

2024

Preprint

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Water scarcity is a global issue worsened by population growth, climate change, and industry. Freezing-based desalination shows potential with lower energy needs and less environmental impact. However, current freezing methods produce ice with inconsistent salt levels, and new solutions are needed. This paper proposes a novel method inspired by directional solidification principles to achieve uniform low salinity in ice formation. This study investigates the efficacy of directional solidification techniques for desalination, contrasting them with conventional top cooling methods. Three distinct setups were employed: Setup_1 utilized top cooling, while Setups 2 and 3 incorporated directional solidification akin to the Bridgman and Czochralski methods. The conventional approach often leads to non-uniform salinity distribution within ice structures due to complex convection phenomena, whereas directional solidification ensures consistent salinity throughout the ice volume. Experimental results demonstrate uniform salinity levels along the lengths of water solutions, measuring 0.34±0.04 wt% NaCl for 1.7 wt% NaCl water and 0.7±0.05 wt% NaCl for 3.4 wt% NaCl water. In multistaging desalination, this saline ice again melts and is further desalinized using the same leads to 0.1±0.05 wt% NaCl, which can be directly used for the drinking stage. Additionally, energy consumption analysis reveals directional solidification’s potential for significant energy savings, with around a 5% reduction observed compared to conventional methods for single-stage desalination. This study marks the initial exploration of desalination via directional solidification, suggesting avenues for further investigation, particularly concerning energy optimization through numerical simulations.

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Section: Introductionmentioning

confidence: 99%

A Novel Method for Maintaining Low and Constant Salinity in Ice During Desalination of Binary Mixtures Using Directional Solidification

Kumar,

Sarawagi

2024

Preprint

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“…The performance of MSF can be improved by integrating it with other desalination systems, such as: MSF-HDH, 11 MSF-RO, 12 and MSF-RO system driven by parabolic trough collectors. 13 In another study, Eiff et al 14 presented a technical and economic analysis of MSF-Crystallizer (Cr) for the treatment of concentrated brine. 14 Results showed that increasing the number of stages increases the gained output ratio of the system.…”

Section: Introductionmentioning

confidence: 99%

“…13 In another study, Eiff et al 14 presented a technical and economic analysis of MSF-Crystallizer (Cr) for the treatment of concentrated brine. 14 Results showed that increasing the number of stages increases the gained output ratio of the system. In addition, the treatment cost of 1.17 $/m 3 of feed was attained at the optimum condition.…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of multi‐stage flash desalination with thermal vapor compression, a practical consideration

Antar

Hamed

Lawal

2021

Intl J of Energy Research

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This work focuses on reducing the energy needed to desalinate seawater through novel integration of MSF system with a thermal vapor compressor (TVC). The analysis extends to investigate positioning the TVC in different locations to find the most suitable location for TVC connection. Two different configurations of TVC's integration to MSF (single or double TVC's with MSF system) are proposed. Analytical models for brine recirculation MSF and MSF-TVC have been established and validated against real plant data where a very good agreement was attained for important process parameters. Results show a significant improvement in thermal performance ratio (from 8.58 to 12.96) for the MSF-TVC, while the steam consumption has also been reduced by 33%.Entrained vapor by TVC from a selected stage adversely affects the heat recovery of the recirculating brine, which drops the top brine temperature (TBT) by about 3 C. This resulted in a decrease in the productivity that is rectified by increasing the rate of brine recirculation to maintain the same desalinated water productivity. Energy analysis revealed a significant drop of about 34% in cooling seawater, which partly leads to energy saving of about 16%. Therefore, the proposed MSF-TVC system shows higher thermal performance ratio, a decrease in the required heat transfer area, and reduction in the required energy per unit mass of pure water produced. Moreover, since the TVC requires higher motive steam pressure, this implies smaller steam pipe diameter. The effect on the integrated power plant load changes is also considered.

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Preparation of nitrogen-doped hierarchical porous carbon electrodes for high performance capacitive deionization

Shi

Wang

et al. 2023

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Technical and economic analysis of an advanced multi-stage flash crystallizer for the treatment of concentrated brine

Cited by 22 publications

References 23 publications

A Novel Method for Maintaining Low and Constant Salinity in Ice During Desalination of Binary Mixtures Using Directional Solidification

A Novel Method for Maintaining Low and Constant Salinity in Ice During Desalination of Binary Mixtures Using Directional Solidification

Performance improvement of multi‐stage flash desalination with thermal vapor compression, a practical consideration

Preparation of nitrogen-doped hierarchical porous carbon electrodes for high performance capacitive deionization

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