Fouling prevention with fluidized particles in evaporation of traditional chinese medicine extract

Liu, Mingyan; Li, Xiulun; Lin, Rui‐Biao; Nie, Wanda; Zhang, Rucheng; Ling, Ning-Sheng

doi:10.1016/s1672-2515(07)60028-1

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…The authors suggested 2 fouling mechanisms: chemical reaction of species in the wort forming polymers and crystallization of species from the wort due to evaporation at bubble nucleation sites in nucleate boiling regions. Liu and others () compared fouling of 2‐phase flow (liquid‐vapor) and 3‐phase flow (liquid–vapor–solid) during the evaporation of Gengnian'an extract. The solid phase was added as inert solid particles.…”

Section: Fouling Studiesmentioning

confidence: 99%

Fouling and Cleaning Studies in the Food and Beverage Industry Classified by Cleaning Type

Goode

Asteriadou

Robbins

et al. 2013

Comp Rev Food Sci Food Safe

126

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Fouling of food process plant surfaces and the subsequent cleaning needed is a significant industrial problem, and as the cost of water and chemical disposal increases, the problem is becoming more significant. Current literature on water-based cleaning is reviewed here according to the classification of 3 types of cleaning problems. By doing this, it is hoped that new knowledge can be highlighted applicable to improving industrial cleaning. (i) For type 1 deposits (that can be cleaned with water alone)-Cleaning time appears related to Reynolds number and surface shear stress. An increase in Reynolds number seems to decrease cleaning time. Cleaning temperatures greater than 50• C do not appear beneficial.(ii) For type 2 deposits (biofilms)-Removal behavior of biofilms seems to be dependent on the microbial aging time on the surface. Keeping a material hydrated on a surface enables easier removal of it with water. a. Water rinsing: Temperature and wall shear stress have varied effects on removal. b. Chemical rinsing: Flow and temperature were seen to have the biggest effect at the start of cleaning, but contact time was more important as cleaning progressed at a given sodium hydroxide solution flow and temperature. (iii) For type 3 deposits (that require a cleaning chemical)-For specifically, protein-based systems excessive chemical forms a deposit difficult to remove. Increasing wall shear stress and temperature was most beneficial to cleaning rather than concentration. The action of temperature can reduce the use of a chemical for type 2 and type 3 soils. The findings suggest that the right combination of flow characteristics at a given temperature and concentration is crucial to achieving fast cleaning in all cases. There are a number of cleaning monitoring methods at various stages of commercialization that may be capable of monitoring bulk cleaning and cleaning at the surface. To optimize cleaning will require integration of measurement methods into the cleaning process.

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Section: Fouling Studiesmentioning

confidence: 99%

Fouling and Cleaning Studies in the Food and Beverage Industry Classified by Cleaning Type

Goode

Asteriadou

Robbins

et al. 2013

Comp Rev Food Sci Food Safe

126

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“…The state of three-phase boiling flow was primarily in the nucleate boiling regime and the circulating velocity of liquor was about 0.6 m/s, according to visual observation, using the CCD measuring technique, carried out in a transparent heating glass tube under similar operating conditions. 2,13,14 The mass flow rate and temperature of the steam condensate were measured using a gauge bank and thermometer, respectively. The pressure and liquid level in the separator were measured by use of a diaphragm manometer and a level indicator, respectively.…”

Section: Installation Flow Chart and Parameter Measurementmentioning

confidence: 99%

“…Based on the physical properties of Gn extract, the technical requirements of three-phase flow, and the experimental results of the single-tube evaporator, 2,13,14 the optimized parameters of solid particles were chosen and determined. 2 The cylindrical solid particles, 0.003 m in both length and diameter, having a density of 2200 kg/m 3 , are composed of physiologically inert material.…”

Section: Concentration Fluid and Materialsmentioning

confidence: 99%

Concentration of Gengnian'an extract with a vapor–liquid–solid evaporator

Liu

Yang

et al. 2005

AIChE Journal

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“…Kollbach et al studied the continuous cleaning characteristics of the fluidized bed heat exchanger during wastewater evaporation and considered its significant antifouling performance. Furthermore, Liu et al developed a three-phase flow boiling evaporator that demonstrated a noticeable antifouling effect. The applications of fluidization technology are not limited to desalination but also extend to environmental and water treatment fields.…”

Section: Introductionmentioning

confidence: 99%

Photothermal Particles-Based Fluidized Evaporation for Solar Seawater Desalination

Duan,

Ma,

Huang

et al. 2023

Ind. Eng. Chem. Res.

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Solar-driven seawater desalination is a green, efficient, and sustainable technology for obtaining clean water. In this paper, a fluidized evaporator was constructed by introducing photothermal particles into a self-made liquid−solid fluidized bed with an inner diameter of 0.01 m and a height of 0.06 m, which combined the advantages of photothermal conversion with the fluidization technology of online fouling prevention and removal. The evaporation performance test result shows that when the size of photothermal particles increases from 0.25 to 1.42 mm under 1 kW/m 2 irradiation, the corresponding evaporation rate decreases from 1.24 to 1.15 kg•m −2 •h −1 . And the solar-to-vapor conversion efficiency decreases from 70 to 63.3%. After desalination in simulated static seawater using photothermal particles, the ion concentration of desalinated water drops by 3−4 orders of magnitude, exhibiting an excellent desalination performance. Moreover, the fluidized bed evaporator has good durability in the cyclic tests.

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Fouling prevention with fluidized particles in evaporation of traditional chinese medicine extract

Cited by 6 publications

References 1 publication

Fouling and Cleaning Studies in the Food and Beverage Industry Classified by Cleaning Type

Fouling and Cleaning Studies in the Food and Beverage Industry Classified by Cleaning Type

Concentration of Gengnian'an extract with a vapor–liquid–solid evaporator

Photothermal Particles-Based Fluidized Evaporation for Solar Seawater Desalination

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