Regeneration of used industrial oils

Гуреев, А. А.; Evdokimov, A. Yu.; Fal'kovich, M. I.; Solodovnikova, V. T.

doi:10.1007/bf00731557

Cited by 2 publications

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“…It was decided to execute this stage at a system temperature of Normal industrial practice comprises of conducting the oil regeneration till satisfactory values for the oil parameters are reached. Previous studies [6,[15][16][17][18][19] have mainly focused on monitoring the condition of the oil. In order to gain a deep understanding of the effect of this process on the paper moisture and LMA, we chose to add an additional stage of processing beyond the 'cleaning of the oil'.…”

Section: • Stagementioning

confidence: 99%

Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

et al. 2019

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Managing a large fleet of ageing assets has become a technical challenge faced by many electricity utilities in developed countries. Asset managers are increasingly interested in techniques that can help extend the useful lifetime of a transformer. Oil regeneration is one of such techniques. In this paper, oil regeneration experiments were performed on a 6.4/0.4 kV retired distribution transformer to investigate the effect of oil regeneration on improving paper conditions. Oil regeneration was conducted in two stages, with the first stage aimed at ‘cleaning the oil’ and the second stage targeted at ‘cleaning the paper’. Oil samples were collected at regular intervals throughout the process and paper samples were obtained from the transformer before and after each oil regeneration stage. It was found that oil regeneration restores oil parameters, including moisture and acidity, similar to those of new oils at the end of stage 1. Analysis of paper samples indicated a reduction in paper moisture at the end of stage 2 by nearly 40%, while low molecular weight acids (LMA) in paper exhibited a reduction by around 30% on average. It is found that the extended oil regeneration period, i.e., stage 2, is necessary to improve the paper condition and hence to reduce the paper ageing rate.

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Section: • Stagementioning

confidence: 99%

Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

et al. 2019

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“…The regeneration of used oil has been done commercially using clays (Fuller's Earth, Bentonite, and Bauxite) to remove the oxygenates formed with aging of the oil. [1][2][3][4][5][6] Several studies using other adsorbents (e.g., silica gel, 7 zeolites, 8 and activated carbon 9 ) have not proved to be more efficient than activated clays for oxygenate removal from used spent oil. In a previous study, 10,11 we have shown the capacity of Filtrol-24 to effectively remove oxygenates from used transformer oil, bringing the oil sample practically to the same original condition of the fresh oil.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Oxygenates from Used Transformer Oil Using Surfactant- and Microemulsion-Impregnated Clays

Silva

Dantas

Neto

et al. 2002

Ind. Eng. Chem. Res.

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This paper presents batch adsorption experimental results for oxygenate removal from used transformer oil using surfactant-and microemulsion-impregnated diatomite as adsorbents. The efficiency of the removal is evaluated by total acidity number (TAN) analysis (ASTM method D-974). TAN results decreased from 0.17 mg of KOH/g to as low as 0.07-0.09 mg of KOH/g for some of the impregnated diatomite samples.

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Regeneration of used industrial oils

Cited by 2 publications

References 0 publications

Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

Adsorption of Oxygenates from Used Transformer Oil Using Surfactant- and Microemulsion-Impregnated Clays

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