Introduction of Crossflow Drop Traps for Intensifying Mass Transfer Apparatus Operation

Чуракова, С. К.; Bogatykh, K. F.; Сидоров, Г. М.; Rezyapov, R. N.

doi:10.1007/s10556-013-9756-y

Cited by 3 publications

(3 citation statements)

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“…As a result, approaches to improving vacuum blocks differ. At large-capacity refineries, improvement consists in determining the optimal [16,17] technological parameters of the process, developing new highly efficient internal devices of the vacuum column [17][18][19][20] and selecting the optimal layout of vacuum-generating systems [21,22]. For vacuum units of mini-refineries, which are designed more for the production of road bitumen, the efficiency of the vacuum overhead system plays a big role since the quality of vacuum gas oils is of secondary importance (motor fuels are obtained by the secondary process of the atmospheric part).…”

Section: Literature Reviewmentioning

confidence: 99%

Mini-Refinery Vacuum Unit: Functional Analysis and Improvement of Vacuum Overhead System

et al. 2021

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The purpose of this study was to analyze the functioning of the vacuum distillation unit of a mini-refinery and to develop recommendations for improving the vacuum overhead system with the aim to reduce the cost of creating and maintaining a vacuum in the fuel oil separation column. A calculation model of the vacuum unit was developed in the Unisim Design R451 software package, which was identified by comparing the calculated data with the data from an industrial study for two operating modes of the installation. Replacing the existing steam-ejector pump with a liquid-ring vacuum pump was proposed. A numerical experiment was carried out on the developed model, the purpose of which was to determine the “bottlenecks” of the scheme. The peculiarity of the experiment was that the vacuum column and the vacuum overhead system were considered as a single whole. As a result, it was determined that the “bottleneck” is the condenser, which was proposed to be replaced. During the technical and economic analysis, two possible vacuum overhead system schemes were considered; according to the results, it was determined that the vacuum overhead system scheme based on a liquid-ring vacuum pump will help reduce operating costs by 78%.

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Section: Literature Reviewmentioning

confidence: 99%

Mini-Refinery Vacuum Unit: Functional Analysis and Improvement of Vacuum Overhead System

et al. 2021

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“…There are studies on a possibility of using spent reagents in wastewater cleaning to entrap pollutant emissions into the atmosphere, while their interaction with spent solutions leads to the formation of less toxic compounds, which are removed by reagent methods [18]. The research [19][20][21][22][23][24] also focuses on reducing the effect of pollutant exhausts of electroplating industry through modern hardware designs.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Performance of Electroplating Gas-Cleaning Equipment

Nitskaya

Smolyakova

Shmidt

2020

SSP

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Electroplating industry has by-products, most of which are harmful. The paper considers the issue of removing aerosol emissions during chrome coating. We developed a droplet separator, which was granted a patent for a useful model. Based on the model, we proposed a stage-by-stage technical procedure for cleaning gas-air mixture to optimize the performance of gas-cleaning equipment during hard chrome coating. We calculated the amounts of water vapor and chromic anhydride which is released during chrome plating without cleaning and when using the developed procedure for gas mixture cleaning. We determined maximum surface concentrations of pollutants in exhaust gases after cleaning.

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“…However, while fall of efficiency of structurally different plates (valve, rectangular-cap, S-shaped, shower-type, etc.) can be fully explained by the above-noted factors, for cross-flow packed contact devices [7][8][9] systematic fall of efficiency in the stripping sections of fractionating towers is inexplicable. In these contact devices, mutually perpendicular intakes of flows of liquid and vapor phases are formed separately such that the loads of each phase were optimal for each contact device.…”

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Effect of Diffusion on Efficiency of Fractionating Tower Contact Devices

Самойлов

Чуракова

2016

Chem Technol Fuels Oils

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A study has been made of 13 industrial fractionating towers having a variety of plate contact devices (S-valve, straight-through valve, rectangular-cap, and Glitch valve devices) and 11 industrial fractionating towers having a variety of cross-flow packing contact devices. It is demonstrated that the efficiency of contact devices of various designs is less in the stripping sections of the fractionating towers than in the concentrating sections. Analysis of the mechanisms of diffusion of fractionated components in vapor and liquid phases in contact devices shows that the diffusion coefficient in the vapor phase decreases from the top to the bottom of the tower as the concentration of high-boiling components increases. This reduces mass transfer from one phase to another in the contact device in the stripping section of the tower and, as a result, reduces the efficiency of the contact device in this section of the tower. It is shown that elevation of pressure in the tower and increased temperature gradient across the tower height cause further decline of the contact device efficiency in the stripping section of the tower.The efficiency of fractionating tower contact devices is evaluated by the ratio of approximation of mass transfer in a real contact device to mass transfer in a conventional theoretical plate where flows of vapor and liquid phases attain equilibrium state upon coming into contact. The efficiency of structurally

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Introduction of Crossflow Drop Traps for Intensifying Mass Transfer Apparatus Operation

Cited by 3 publications

References 1 publication

Mini-Refinery Vacuum Unit: Functional Analysis and Improvement of Vacuum Overhead System

Mini-Refinery Vacuum Unit: Functional Analysis and Improvement of Vacuum Overhead System

Optimizing the Performance of Electroplating Gas-Cleaning Equipment

Effect of Diffusion on Efficiency of Fractionating Tower Contact Devices

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