Investigating effect of polymer concentrations on separation performance of hydrocyclone by sensitivity analysis

Liu, Yang; Bu, Fanxi; Jiang, Minghu

doi:10.1002/ese3.884

Cited by 8 publications

(2 citation statements)

References 22 publications

(20 reference statements)

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“…As can be seen, the improved pseudoplastic behavior and apparent viscosity impaired the collection of particulate material, leading to a smaller number of particles in the underflow stream. It is known that apparent viscosity is an important parameter in the fluid’s vortex flow field and that the increased apparent viscosity of the non-Newtonian fluid is the most fundamental reason for the decreases observed in the tangential velocity and collection efficiency. ,, In addition, the grade efficiency curves show that when comparing both devices, the filtering hydrocyclone can collect more fine particles than the conventional equipment. This might be due to the suspension tendency to maintain near the porous wall, ,,, which could keep finer material in the forced vortex, increasing its chance of being collected.…”

Section: Resultsmentioning

confidence: 99%

“…The reduced overall efficiency evaluates the solid material collected in the underflow stream due to the centrifugal sedimentation of the device. When the solids concentration increases or when the suspension becomes more viscous and pseudoplastic because of the viscosifier addition, both the vortex intensity and the tangential velocity decrease, ,,,,,, thus reducing the number of particles collected by centrifugal sedimentation of the hydrocyclone, which results in a lower E T ′.…”

Section: Resultsmentioning

confidence: 99%

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Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Morimoto,

Gonçalves,

Barrozo

et al. 2023

Ind. Eng. Chem. Res.

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Hydrocyclones are devices used to separate a discrete phase (solid or liquid) from a continuous liquid phase. Although this partition process is simple and versatile, there are limitations when separating concentrated suspensions with high viscosity. By replacing the cylinder or cone walls of hydrocyclones by a permeable wall, our research group developed the so-called filtering hydrocyclones. Although previous studies have shown that filtering hydrocyclones have a better performance than conventional devices of the same geometry, they were performed with diluted Newtonian suspensions. Thus, the aim of the present work is to evaluate the performance of a filtering and a conventional hydrocyclone of the same geometry operating with concentrate suspensions with pseudoplastic rheological behavior. The geometric relationship of these hydrocyclones was obtained in a previous optimization study that aimed at maximizing overall efficiency in aqueous diluted suspensions; this high-efficiency device is known as MOEH. When operating a pseudoplastic fluid with a behavior index equal to 0.6536, there was a 48% decrease in the efficiency of the MOEH hydrocyclone. The MOEH experiments performed with a pseudoplastic suspension containing 9.5 wt % of solids and 0.6 wt % of carboxymethyl cellulose achieved an Euler number of 1108, a split ratio of 44%, and an overall efficiency of 47%. However, the average results demonstrated that the operation with the newly designed filtering hydrocyclone, called MOEH-CoF, led to an Euler number about 10% lower and an overall efficiency about 5% higher than that obtained with the conventional device. The findings of this study can lead to a better understanding of solid–liquid separation in the petrochemical, mineral, and food industries, which generally works with concentrated non-Newtonian fluids.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Morimoto,

Gonçalves,

Barrozo

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

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Study on synergistic catalytic degradation of wastewater containing polyacrylamide catalyzed by low-temperature plasma-H2O2

Jiang,

Guan,

Wang

et al. 2023

Environ Sci Pollut Res

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Low temperature plasma technology shows promise in sewage treatment with its advantages of high degradation e ciency, simple operation, and fewer by-products. In this study, a self-built Dielectric Barrier Discharge (DBD) plasma degradation experimental platform was utilized to simulate polymer-containing wastewater from an oil eld using a polyacrylamide (PAM) solution. The PAM solution was treated with low temperature plasma generated by dielectric barrier discharge combined with H 2 O 2 and a Mn + Cu/AC composite catalyst. The effects of different catalyst dosage, H 2 O 2 addition amount, DBD voltage on the degradation rate of polyacrylamide, molecular weight of solution, PH value of solution and solution viscosity were studied. The characterization of the polyacrylamide and composite catalyst before and after degradation was also conducted. The optimal conditions for the oxidation degradation of a PAM solution using low temperature plasma-H 2 O 2 -Mn + Cu/AC were determined as follows:: initial concentration 1000 mg/L, discharge voltage 18 kV, H 2 O 2 addition of 2% and catalyst addition of 810 mg.Increasing the catalyst dosage resulted in higher degradation rates, as well as decreased dynamic viscosity, pH value, and molecular weight of the solution. Under these conditions, the degradation rates of 60 min, 180 min and 300 min were 71.4%, 97.6% and 98.6%, respectively.

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Investigating effect of polymer concentrations on separation performance of hydrocyclone by sensitivity analysis

Cited by 8 publications

References 22 publications

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Study on synergistic catalytic degradation of wastewater containing polyacrylamide catalyzed by low-temperature plasma-H2O2

CFD analysis and calculation models establishment of leakage of natural gas pipeline considering real buried environment

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