Intensification of gas flow purification from finely dispersed particles by means of rectangular separator

Дмитриев, А. В.; Зинуров, В. Э.; Дмитриева, О. С.

doi:10.1088/1757-899x/451/1/012211

Cited by 17 publications

(4 citation statements)

References 20 publications

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“…Сепарацию мелкодисперсных частиц диоксида кремния из газового потока в более общем виде можно описать следующим образом: газ с частицами подается в сепаратор с соосно расположенными трубами через входное отверстие 1, после чего он продвигается в нижнюю часть внутренней цилиндрической трубы 4 по мере достижения плоскости, на которой начинают появляться прямоугольные щели 5, структура движения газа изменяется -она начинает равномерно распределяться в осесимметричном направлении к прямоугольным щелям 5 [10][11][12]. Таким образом, направление движения газа изменяется на 90º.…”

Section: описание устройстваunclassified

“…Пористость фильтровальных материалов подбирается индивидуально в зависимости от характеристик частиц в газовом потоке. Следует отметить, что использование циклона перед рукавным фильтром позволяет предотвратить преждевременный износ фильтровальных материалов за счет улавливания относительно крупных частиц размером более 20 мкм [10][11][12][13][14]. Ключевыми недостатками двухступенчатой системы улавливания частиц диоксида кремния из газового потока является высокое гидравлическое сопротивление, приводящее к высоким энергетическим затратам линии, и необходимость в периодической очистке рукавов и замена фильтровальных материалов.…”

Section: Introductionunclassified

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Estimation of power consumption when trapping finely-dispersed particles in a separator with coaxially-arranged pipes

Зинуров¹,

Дмитриев²,

Badretdinova³

et al. 2021

jour

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This article sets out to estimate power consumption when trapping finely-dispersed particles of silicon dioxide using a separator with coaxially-arranged pipes, as well as the efficiency of such an installation. To this end, a numerical simulation of the movement of a gas flow with finely-dispersed particles of silicon dioxide through a separator with coaxial pipes was carried out in the ANSYS Fluent software. During the experiments, the inlet gas flow rate varied from 5 to 10 m/s, while the width and height of the rectangular slit ranged 2.1-8.7 and 10-30 mm, respectively. It was shown that the maximum efficiency of collecting finely-dispersed silicon dioxide particles and the minimum power consumption required for pumping the gas flow through the installation largely depends on the formation of a stable vortex structure in the interpipe space. The research showed that the optimal inlet gas flow rate equals 7.5 m/s. At this rate, the efficiency of particle collection corresponds to higher rates with a devia tion of ± 6%. In this case, the pressure loss is 1.74 times lower than that at higher rates. In order to achieve an efficiency of at least 90% with the height of the rectangular slit from 10 to 30 mm, the Stokes numbers must correspond to values of more than 50. The power consumption required for pumping a gas containing silicon dioxide particles through a separator equipped with coaxial pipes comprises from 1.9 to 31.2 W at the inlet gas flow rate of 7.5 m/s. In this case, the parameters of the rectangular slit are as follows: width - from 2.1 to 8.7 mm, height - from 10 to 30 mm. The use of separators with coaxially-arranged pipes in technological lines based on plasma technologies can become an alternative to installations for fine gas purification.

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Section: описание устройстваunclassified

Section: Introductionunclassified

Estimation of power consumption when trapping finely-dispersed particles in a separator with coaxially-arranged pipes

Зинуров¹,

Дмитриев²,

Badretdinova³

et al. 2021

jour

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“…The rectangular separator has a simple and compact design, consisting of several rows of U-shaped elements, assembled into a rectangular case [19,20]. There are inlet and outlet nozzles from both parallel sides of device, designed for the input of spent contaminated oil and the output of contaminants from the separator, respectively.…”

Section: Issues To Be Studiedmentioning

confidence: 99%

Removal of moisture from contaminated transformer oil in rectangular separators

et al. 2019

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This paper deals with the removal of moisture from the contaminated transformer oil. Design of a rectangular separator and the results of water-oil emulsion separation are shown in this paper. The influence of different values of the separator height and the distance between the rows of elements on the emulsion separation efficiency was studied. In order to calculate the process of removing the moisture from transformer insulating oil, the multiphase Eulerian-Eulerian model “Volume of Fluid” with the number of phases equal to 2 was applied in ANSYS Fluent software package. K–ε turbulence model was used for the calculations. The results were obtained while solving the nonstationary issue. In the course of numerical simulation, the object of study was the transformer oil T-1500U, containing some water amount. The results of numerical simulation of water-oil emulsion separation in a rectangular separator are shown. In the course of numerical studies, it was found that the use of a rectangular separator in order to remove the moisture from transformer oil allows it to be purified from water by 99.99%, providing that the geometrical dimensions of device are chosen correctly. The use of developed rectangular separator can be an alternative to the use of decanting tanks, various separators and other purification devices, which have extremely low rate of purification of contaminated spent oils. This separator allows purifying the transformer oil from water with a speed of 1-2 m/s while the efficiency is equal to 99.99%.

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“…Uncollected during the purification process, the finely dispersed particles at the industrial enterprises cause the failure of devices due to clogging with various type of dirt, formed by the accumulation of dust [1][2][3][4]. Also, uncollected finely dispersed particles often cause a decrease in the properties of devices, an increase in the hydraulic resistance of pipelines and lead to explosive and fire-hazardous situations [5][6][7][8][9]. For example, at the gas distribution stations, the finely dispersed particles, when getting into the process and gas-regulating equipment, impair operation of them.…”

Section: Introductionmentioning

confidence: 99%

The gas flow dynamics in a separator with coaxially arranged pipes

et al. 2020

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In order to increase the efficiency of gas purification from the particles of up to 20 microns and to increase the service life of bag and electrostatic filters, the authors propose to use a centrifugal separation device with coaxially arranged pipes to be installed before the fine purification devices. The numerical studies of gas dynamics in a separation device were conducted in ANSYS Fluent software package. As a result of conducted numerical studies, it was found that the pressure loss in the centrifugal separation device is not more than 70 Pa at the inlet gas flow rate from 1 to 15 m/s and the width of rectangular hole within the range from 10 to 15 mm. The low pressure losses are caused by the design features; in particular, the resulting vortices in the inter-cylindrical space practically do not contact the wall surfaces of device. The equations of pressure loss depending on the width of rectangular holes and the hydraulic resistance coefficient of separation device depending on the inlet gas flow rate were obtained. The design coefficient of hydraulic resistance of separation device was equal to 0.45.

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Intensification of gas flow purification from finely dispersed particles by means of rectangular separator

Cited by 17 publications

References 20 publications

Estimation of power consumption when trapping finely-dispersed particles in a separator with coaxially-arranged pipes

Estimation of power consumption when trapping finely-dispersed particles in a separator with coaxially-arranged pipes

Removal of moisture from contaminated transformer oil in rectangular separators

The gas flow dynamics in a separator with coaxially arranged pipes

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