Growth kinetics of calcium fluoride at high supersaturation in a fluidized bed reactor

Jiang, Ke; Zhou, Kanggen; Yang, Yongbin; Du, Huiling

doi:10.1080/09593330.2013.811542

Cited by 32 publications

(13 citation statements)

References 12 publications

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“…However, the increase in the mass percentage of CaCO 3 of every pellet was related to the crystallization efficiency of CaCO 3 for each pellet. Accordingly, the crystallization efficiency decreased as the pellet size increased [15]. However, note that a certain function relationship existed between the pellet size and the mass percentage of CaCO 3 , as shown in Figure 6b [10,20].…”

Section: Resultsmentioning

confidence: 99%

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Full-Scale Experimental Study of Groundwater Softening in a Circulating Pellet Fluidized Reactor

Zhi

Tang

2018

IJERPH

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The softening effect of a new type of circulating pellet fluidized bed (CPFB) reactor on groundwater was studied through a full-scale experiment. The operation of the CPFB reactor in the second water plant in Chang’an District in Xi’an China was monitored for one year, and the results were compared with those for the Amsterdam reactor in The Netherlands. The removal efficiency of Ca2+ in the CPFB reactor reached 90%; the removal rate of total hardness was higher than 60%; effluent pH was 9.5–9.8; the turbidity of the effluent and the turbidity after boiling were lower than 1.0 NTU; the unit cost was less than €0.064 per m3; and the softened effluent was stable. The pellets in the CPFB reactor were circulated, providing higher crystallization efficiency. The diameter of the discharged pellets reached between 3–5 mm, and the fluidized area height of the CPFB reactor was 4 m. The performance parameters of the CFPB reactor were optimized.

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Section: Resultsmentioning

confidence: 99%

“…The hardness and Ca 2+ and Mg 2+ concentrations of inlet water and outlet water was analyzed through ethylenediaminetetraacetic acid (EDTA) [15]. After drying, pictures of the pellets were taken using the microscope Nikon 50i (Nikon, Tokyo, Japan).…”

Section: Methodsmentioning

confidence: 99%

Full-Scale Experimental Study of Groundwater Softening in a Circulating Pellet Fluidized Reactor

Zhi

Tang

2018

IJERPH

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“…In recent years, studies have been conducted to determine crystallization conditions. The factors reaction pH, reaction molar ratio, and supersaturation are considered to be the main factors influencing the crystallization process [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the fluidized bed for crystallization process: seed fluidization study

Jiang¹,

Zhou²

2019

Desalination and Water Treatment

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To investigate the influence of seed fluidization on the operation and design of the fluidized bed for crystallization process, the relationships between the seed mass, seed size (L), the minimum fluidization velocity (U mf), and the terminal velocity (U t) were determined using quartz sand. The results show that the equation U mf = 7.40 × 10-4 × L 0.51 can be used to predict the minimum fluidization velocity at the seed size range of 176.5-844.6 μm. The equation U t = 7.72 × 10-6 × L 1.38 can be used to predict the terminal velocity at the seed size range of 109.7-763.1 μm. The pressure difference of the FBR can be used to estimate the seed mass. The design of the sedimentation zone and the adjustment of the reflux flow are possible ways to control the fluid velocity between the minimum fluidization velocity and the terminal velocity, allowing the seed to maintain fluidization without running out of the fluidized bed.

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“…In fact, next to Tai et al [8][9][10], Gürbüz et al [11], and Ferreira et al [12] it was primarily the group of Ulrich that again focused on this technique in the early 1990s and lastly published their crystal growth rate data in 2002 [13], 2003 [14], and 2011 [15]. The most recent studies on crystal-growth rates examined in a liquid fluidized bed under constant supersaturation conditions were published by Sodeifian and Niknam [16] in 2012 and Jiang et al [17] in 2014.…”

Section: Introductionmentioning

confidence: 99%

Growth Rate Measurements of Organic Crystals in a Cone‐Shaped Fluidized‐Bed Cell

et al. 2018

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Knowledge of crystal growth rates and the factors that affect these rates is often an essential prerequisite for designing industrial processes that yield a desired crystalline product. Herein, the effects of saturation temperature, supersaturation, and seed‐crystal size on the overall linear growth rate of L‐alanine were examined by using a cone‐shaped fluidized‐bed cell. For a systematic investigation, a “design of experiment” approach was applied that used a two‐level full‐factorial design. It was found that the interaction effects of the three factors mentioned above play a considerable role in interpreting the effect of each individual factor on the growth rate. These interaction effects must be considered when gaining knowledge of crystal growth for the purpose of process design.

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Growth kinetics of calcium fluoride at high supersaturation in a fluidized bed reactor

Cited by 32 publications

References 12 publications

Full-Scale Experimental Study of Groundwater Softening in a Circulating Pellet Fluidized Reactor

Full-Scale Experimental Study of Groundwater Softening in a Circulating Pellet Fluidized Reactor

Optimization of the fluidized bed for crystallization process: seed fluidization study

Growth Rate Measurements of Organic Crystals in a Cone‐Shaped Fluidized‐Bed Cell

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