Desalination of seawater by spray freezing in a natural draft tower

Liu, Yang; Ming, Tingzhen; Wu, Yongjia; Richter, Renaud de; Fang, Yueping; Zhou, Nan

doi:10.1016/j.desal.2020.114700

Cited by 26 publications

(5 citation statements)

References 47 publications

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“…Recently, Xie et al enhanced heat transfer and phase separation in the freeze desalination process [43] by investigating the effects of initial refrigerant temperature, the ratio of produced ice to feed seawater mass, and ice production. In the spray freezing desalination studied by Liu et al [44] warm seawater is sprayed at the top of a freezing tower and cold air (from the atmosphere or re-gasification of liquefied natural gas) is injected at the bottom of the tower. As the sprayed seawater droplets descend, heat transfer results in ice particle formation.…”

Section: Freezing Desalinationmentioning

confidence: 99%

Dichotomy of Thermal Desalination: To Evaporate or to Freeze, that is the Question

S Kim

2022

EIMBO

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Section: Freezing Desalinationmentioning

confidence: 99%

Dichotomy of Thermal Desalination: To Evaporate or to Freeze, that is the Question

S Kim

2022

EIMBO

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“…In works [4,5], methods of using the energy of liquefied natural gas for freezing and desalination of sea water are considered. Compared to other freeze desalination methods, the large contact area between water and air and the low thermal resistance result in a higher energy efficiency [6].…”

Section: Suggested Solution To the Problemmentioning

confidence: 99%

Development of the design and determination of the mode characteristics of the demineralizer for sea water

Burdo

Bezbakh

Fatieieva

et al. 2021

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The object of research is block low-temperature installations for obtaining fresh water. Investigated problem: obtaining fresh water from sea using low-temperature technologies. Main scientific results: the design is developed and the operating characteristics of the demineralizer for sea water are determined. The influence of the initial salt content of sea water on the ice formation rate is determined. With an increase in the salinity of 3.5 times, productivity on ice decreases 2.3 times. The kinetics of the salt content in the freezing solution depends on the initial concentration. With an initial salt content of 6.74 g/l, the process rate is 0.4 g/h, with a salt content of 1 g/l – 0.14 g/h With an initial salt content of 6.74 g/l, the process of separating wastewater from the ice block is more intensive. The salt content of the first portion of the effluent is 3.2 times higher than the initial concentration of the solution. A cryoscopic curve was obtained for seawater in the concentration range from 0 to 6.74 g/l. The area of practical use of the research results: studies of the quality of the obtained water showed that the content of nitrates decreases 5 times, the hardness decreases by 2 mg/dm³. The salt content is reduced from 858 mg/dm³ to 560 mg/dm³. Plants for the concentration of food liquids by the block freezing method are designed to produce environmentally friendly products that preserve the bioactive complex of raw materials as much as possible with minimal energy consumption. An innovative technological product: design and operating modes of a block freezing plant for seawater desalination. Scope of application of the innovative technological product: industrial enterprises, the technological process of which requires small volumes of fresh water; to obtain fresh water on oil platforms in the oceans; small hotels, boarding houses on the seaside.

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“…Liquid lenses are formed when droplets are deposited on stationary immiscible, denser, and less volatile liquid surfaces, , and its evaporation is vital in various industrial and scientific areas, such as freezing desalination, , energy storage system, , flow battery, etc. Hence, it is essential to explore the evaporation characteristics of the liquid lens.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Numerical Studies of Liquid Lens Evaporation with Coupled Fields

Shen

Wang

et al. 2022

Ind. Eng. Chem. Res.

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The evaporation of the liquid lens on an immiscible liquid is widely adopted in many industrial and scientific applications, so it is crucial to predict the evaporation rate and lifetime of the liquid lens. During the evaporation, the internal thermocapillary flow, external natural convection, and interfacial evaporative cooling are coupled together and affect the evaporation characteristics greatly. In this paper, the slow and fast evaporation with coupled fields are studied by theoretical analysis and numerical simulation, respectively. It is found that the evaporative cooling can always inhibit the liquid lens evaporation, while the thermocapillary flow and natural convection can enhance the liquid lens evaporation. The total evaporation rate is determined by the competence between the interfacial evaporative flux and upper surface of the liquid lens. With the increasing liquid lens volume, the total evaporation rate will generally increase for fast evaporation, while for slow evaporation that only considers the evaporative cooling effect, the total evaporation rate may decrease at a low tangential angle ratio. The evaporation of the liquid lens follows the constant contact angle mode, the transient variation of volume satisfies the "2/3 law", independent of evaporative cooling, thermocapillary flow, and natural convection, and it is analogous to the sessile droplet evaporation in constant contact angle mode. These findings can provide guidance for the wide application of liquid lens evaporation.

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Desalination of seawater by spray freezing in a natural draft tower

Cited by 26 publications

References 47 publications

Dichotomy of Thermal Desalination: To Evaporate or to Freeze, that is the Question

Dichotomy of Thermal Desalination: To Evaporate or to Freeze, that is the Question

Development of the design and determination of the mode characteristics of the demineralizer for sea water

Theoretical and Numerical Studies of Liquid Lens Evaporation with Coupled Fields

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