Scale deposit removal by means of ultrasonic cavitation

Pečnik, Boštjan; Hočevar, Marko; Širok, Brane; Bizjan, Benjamin

doi:10.1016/j.wear.2016.03.012

Cited by 37 publications

(15 citation statements)

References 15 publications

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“…The bubble implosion can create thousands of Kelvins of temperature and pressures in the range of gigapascals and, therefore, may damage solid surfaces immersed in the liquid [13] . Pečnik et al investigated descaling mechanisms of cavitation-based cleaning and discovered two different erosion processes: eroding layer by layer (cohesion interaction) and cracking larger pieces of coated surface (adhesion interaction), depending on the composition and microstructure of the fouling [16] . They noted that the erosion strongly depends on the pressure amplitude of the applied ultrasound.…”

Section: Introductionmentioning

confidence: 99%

FEM-based time-reversal enhanced ultrasonic cleaning

Mustonen

Tommiska

Holmstrom

et al. 2021

Ultrasonics Sonochemistry

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Section: Introductionmentioning

confidence: 99%

FEM-based time-reversal enhanced ultrasonic cleaning

Mustonen

Tommiska

Holmstrom

et al. 2021

Ultrasonics Sonochemistry

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“…17,18 In recent years, the effects of material properties on the cavitation erosion have been of particular interest in practical applications that involve cavitation. 19 Different materials can manifest significantly different cavitation erosion characteristics. Provided that there is some reaction between material elements and the surrounding liquid medium, the cavitation erosion might be accelerated.…”

Section: Introductionmentioning

confidence: 99%

Comparative investigation of ultrasonic cavitation erosion for three materials in deionized water

Opare

Kang

Xiao

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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To investigate the response of material to cavitation erosion, a comparative work was carried out on three materials, aluminum, copper alloy and titanium. Ultrasonic cavitation erosion was produced as the specimen was submerged in the deionized water. Within a cavitation erosion period of 120 min, the cumulative mass loss was measured at certain time intervals. Surface structure and cavitation damage patterns were observed for the three materials. Microhardness was measured and compared. The results indicate that the cumulative mass loss of aluminum is the highest among the three materials, while the slightest material removal is associated with titanium, which is still in the initial stage of cavitation erosion after 120 min of cavitation erosion. The surface of the aluminum specimen is eroded rapidly after the cavitation erosion commences. Large erosion pits dominate the eroded surface as the cavitation erosion progresses. The surface of the titanium specimen manifests needle-like erosion pits and cleavage cracks. Even at the later stage of the cavitation erosion, non-eroded surface elements are identifiable. The cavitation erosion pattern on the copper alloy specimen surface is related to the twin-phase crystal structure and large erosion pits are produced at the later stage of cavitation erosion. The highest resistance to the cavitation erosion of titanium is related to the close-packed hexagonal structure and the weak slip effect associated.

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“…Near the liquid-solid interface, cavity collapse leads to boundary layer destruction and mass/heat transfer improvements. e ultrasonic technique is seen as an effective way of achieving faster, proper, and uniform nucleation, comparatively easy nucleation of particles at lower supersaturation levels, and reduced agglomeration [41,42].…”

Section: Introductionmentioning

confidence: 99%

Application of Ultraviolet Radiation to Control the Calcium Carbonate Scale Formation and Deposition on the Membranes

Basheer

Deen

Al-Mutairi

et al. 2020

Journal of Chemistry

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Scale formation on surfaces in contact with water supersaturated with calcium carbonate creates technical problems, including heat transfer hindrance, energy consumption, and equipment shutdown. Thus, nowadays, there is an increasing need for new approaches that are environmentally friendly and economically feasible. In this work, for the first time, calcium carbonate growth was investigated using UV light exposure, and the growth rate was compared with control and commercial antiscalant. Saturated calcium carbonate samples were exposed to UV radiation; the growth rate of calcium carbonate crystals was monitored at different time intervals. Results clearly show that about 85% decrease in crystal growth rate was observed when compared to 43% after the addition of 3 mg/L of amino tris(methylene phosphonic acid) antiscalant. Calcium carbonate scale deposition on hydrophobic and hydrophilic membranes was investigated. The amount of scale deposited in the case of a UV-treated sample is insignificant when compared to control samples. Thus, the exposure of UV might help to improve the membranes’ lifetime. X-ray diffraction and scanning electron microscopy analyses revealed that UV light treatment produced mostly calcite crystals. The produced calcites are less dense and less adherent, and it can be easily removable when compared to other types of calcium carbonate phases. Thus, UV radiation is an efficient green approach for calcium carbonate scale mitigation on membrane surfaces.

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Scale deposit removal by means of ultrasonic cavitation

Cited by 37 publications

References 15 publications

FEM-based time-reversal enhanced ultrasonic cleaning

FEM-based time-reversal enhanced ultrasonic cleaning

Comparative investigation of ultrasonic cavitation erosion for three materials in deionized water

Application of Ultraviolet Radiation to Control the Calcium Carbonate Scale Formation and Deposition on the Membranes

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