COMPARATIVE PARAMETRIC ANALYSIS OF GAS FLOW IN THREE DIFFERENT DESIGNS OF IN-LINE SCRUBBER BOTTOM INLET

In this study, gas flow fields were simulated using ANSYS 2020R2, Fluid Flow Fluent computational fluids dynamic (CFD) software based on the continuity, velocity, temperature, energy and k - e turbulence. The overall objective of the study is to compare the velocity maps inside the wet scrubber system for three different In-Line scrubber bottom inlet designs. Also, the behavior of the temperature of the mixture inside the scrubber is studied according to the number of nozzles provided by each system from those proposed for study. The numerical simulation using CFD is an effective method to study the flow characteristics of a counter-flow wet scrubber system and the most efficient wet scrubber model is the one with several. The results show that the residuals have a very good job of converging at minimum flow contours and vectors at the inlet across the scrubbing chamber and outlet shows a distributed flow. The speed of water droplets sprayed by the nozzles during mixing with waste gas in the scrubber chamber is double at model with 52 nozzles compared to the first model, equipped with only 13 nozzles. The velocity of clean gases discharged to the ship’s hull shows increases of over 100% of the values, with the increase of the number of nozzles. Spray nozzles improve mixing between the scrubbing liquid and waste gas, by injecting liquid through nozzles to create a fine droplet spray pattern. In this study it can be seen how the number of nozzles influences the quality of the mixture between the scrubbing liquid and waste gas.

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COMPARATIVE CFD BASED PARAMETRIC ANALYSIS OF GAS FLOW IN TWO CONTER-FLOW WET SCRUBBER SYSTEMS

Journal of marine Technology and Environment ◽

10.53464/jmte.01.2021.04 ◽

2021 ◽

Vol 1 (2021) ◽

pp. 28-32

Author(s):

Daniela-Elena Jugănaru ◽

Mariana Panaitescu ◽

Liviu-Constantin Stan

Keyword(s):

Flue Gas ◽

Gas Flow ◽

Flow Characteristics ◽

Bulk Water ◽

Dust Particles ◽

Type I ◽

Engine Exhaust ◽

Waste Gas ◽

Velocity Flow ◽

Wet Scrubber

" In this study, gas flow field were simulated using ANSYS 2020R2, Fluid Flow Fluent computational fluids dynamic (CFD) software based on the continuity, velocity, temperature, energy and k -  turbulence. The overall objective of the study is to compare the pressure and velocity maps inside the wet scrubber system for two different scrubber designs. I have choose to analyse an In-Line scrubber bottom inlet, type I, and In-Line scrubber side inlet, type L. Bottom entry or side entry designs to allow a direct up-flow configuration and simplify engine exhaust gas duct routing for any type of vessel. The flow in a wet scrubber is very complex due to the interaction between dust particles, water droplets, and bulk water and flue gas. The flue gas flow is turbulent and there are multiple phases (gas, liquid and solid). CFD codes that predict gas flow patterns are based on conservation equations for mass, momentum and energy. The results show that the residuals have a very good job of converging at minimum flow contours and vectors at the inlet across the scrubbing chamber and outlet shows a distributed flow. The velocity profiles have fully conformed to the recommended profile for turbulent flow in pipes. As can be seen in the figures above, the velocity flow contour inside the scrubber is higher in the scrubber side inlet. Even though I choose to study the simplified scrubber model without taking into account that spray nozzle improve mixing between the scrubbing liquid and waste gas; from the results obtained, it can be deduced that the numerical simulation using CFD is an effective method to study the flow characteristics of a counter-flow wet scrubber system. "

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Predictable Model for Characteristics of One-Dimensional Solid-Gas-Liquid Three-Phase Mixtures Flow Along a Vertical Pipeline With an Abrupt Enlargement in Diameter

Journal of Fluids Engineering ◽

10.1115/1.2822211 ◽

1999 ◽

Vol 121 (2) ◽

pp. 330-342 ◽

Cited By ~ 9

Author(s):

Natsuo Hatta ◽

Masaaki Omodaka ◽

Fumitaka Nakajima ◽

Takahiro Takatsu ◽

Hitoshi Fujimoto ◽

...

Keyword(s):

Gas Flow ◽

Sudden Change ◽

Flow Characteristics ◽

Point Of View ◽

Solid Particles ◽

Governing Equations ◽

One Dimensional ◽

Three Phase ◽

Experimental Values ◽

The One

This paper treats the numerical analysis of the rising process of a solid-gas-liquid three-phase mixture along a vertical pipeline with an abrupt enlargement in diameter. The system of governing equations used is based upon the one-dimensional multifluid model and the transitions of gas flow pattern are taken into account in the system of governing equations. For the case of a sudden enlargement in diameter in a coaxial pipeline, the procedure of the numerical calculation to obtain the flow characteristics in the pipeline section after a sudden change in diameter has been established here. Furthermore, in order to confirm the validity of the present theoretical model by the comparison between the calculated and experimental values, the experiments have been made using four kinds of lifting pipes, including the straight one. Thereby, it has been found that the numerical model proposed here gives good fit to the prediction of the flow rates of lifted water and solid particles against that of air supplied for the case of a sudden change in diameter. In addition, the flowing process for each phase has been investigated from a photographic point of view. As a result, we found that the moving process of the solid particles depends strongly upon the volumetric flux of gas-phase as well as the submergence ratio.

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CFD Based Parametric Analysis of Gas Flow in A Counter-Flow Wet Scrubber System

International Journal of Environmental Protection and Policy ◽

10.11648/j.ijepp.20130102.11 ◽

2013 ◽

Vol 1 (2) ◽

pp. 16 ◽

Cited By ~ 3

Author(s):

Bashir Ahmed Danzomo

Keyword(s):

Parametric Analysis ◽

Gas Flow ◽

Counter Flow ◽

Wet Scrubber

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EXPERIMENTAL INVESTIGATION OF GAS FLOW CHARACTERISTICS IN TRANSPIRATION COOLED POROUS MATRICES

10.1615/ihtc5.970 ◽

1974 ◽

Cited By ~ 1

Author(s):

Cesare V. Boffa

Keyword(s):

Experimental Investigation ◽

Gas Flow ◽

Flow Characteristics ◽

Porous Matrices

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Evaluation of the Properties of Humus Liquid of Earthworm Eisenia Foetida Obtained from Different Rachis

International Journal of Science and Engineering Invention ◽

10.23958/ijsei/vol03-i02/01 ◽

2017 ◽

Vol 3 (02) ◽

Author(s):

Ramiro Remigio Gaibor FernÃ¡ndez ◽

Abraham Adalberto Bayas Zamora ◽

Galo Israel MuÃ±oz SÃ¡nchez ◽

Cristhian AdriÃ¡n Rivas Santacruz

Keyword(s):

Plant Growth ◽

Fulvic Acids ◽

Cattle Manure ◽

Eisenia Foetida ◽

Humic And Fulvic Acids ◽

Livestock Manure ◽

A Value ◽

The One ◽

Liquid Slurry

The objective of the present investigation was to evaluate the physical characteristics of the vermicompost and the quality of the purine of the red Californian (Eisenia foetida) using different substrates of feed for these worms. For this purpose, nine treatments were studied: 75% African palm rachis + 25% cattle manure, 50% African palm rachis + 50% cattle manure, 25% African palm rachis + 75% livestock manure, 50% manure of cattle, 50% of manure of cattle, 25% of manure of cattle, 50% of manure of cattle, 50% of manure of cattle, 50% of rach of coconut + 50% of manure of Livestock, 25% coccus rachis + 75% livestock manure. The substrate made up of 50% of rachis of coconut and 50% of livestock manure can be used in nurseries or nurseries for being the one that registered a value of pH 7.3 plus the closest to the neutral compared to the others, besides this (75% of oil palm rachis and 25% of cattle manure) showed a higher content of humic and fulvic acids (0.87 and 0.45 p / p, respectively), compounds that are important for agriculture by stimulating plant growth, in addition to this reflection 0.06% sulfur content, 4.0 ppm boron, 7.0 ppm copper, 47.5 ppm iron, 6.0 ppm manganese, with a presence of microorganisms of the species Trichoderma, Penicillium, Cladosporium sp. in amounts of 1.91x105 UFC / ml, however in this substrate was obtained between 13.3 and 43.5% less liquid slurry in Comparison with other treatments.

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Contribution to a Magnetite Consumption in the Karviná Mine's Preparation Plant of the Lazy Plant / Příspěvek Ke Spotřebě Magnetitu Na Úpravně Dolu Karviná, Závodu Lazy

GeoScience Engineering ◽

10.2478/gse-2014-0035 ◽

2012 ◽

Vol 58 (2) ◽

pp. 1-6

Author(s):

Radim Pavlík ◽

Vlastimil Řepka

Keyword(s):

The One ◽

Preparation Plant

Abstract In its introduction, this contribution deals with the usage of magnetite during the process of coal separation in the Karviná Mine's preparation plant of the Lazy Plant. Next it deals with the evaluation of quality of magnetite used in the preparation plant, losses of magnetite adhering to the products leaving the preparation plant, the recovery of a diluted suspension with focus on the efficiency of magnetite separation of the diluted suspension and the comparison of the magnetite consumption with the one in the ČSM preparation plant. In conclusions, the article presents options leading to the reduction of the magnetite consumption in the Karviná Mine's preparation plant of the Lazy plant. For comparison, the data of the ČSM Mine is stated here.

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The concept of motivation for effective credit risk management

Finance and Credit ◽

10.24891/fc.26.11.2567 ◽

2020 ◽

Vol 26 (11) ◽

pp. 2567-2593

Author(s):

M.V. Pomazanov

Keyword(s):

Risk Management ◽

Economic Modeling ◽

Type I ◽

Credit Risk Management ◽

Curve Modeling ◽

Business Functions ◽

The Common ◽

Lending Decisions ◽

The One

Subject. The study addresses the improvement of risk management efficiency and the quality of lending decisions made by banks. Objectives. The aim is to present the bank management with a fair algorithm for risk management motivation on the one hand, and the credit management (business) on the other hand. Within the framework of the common goal to maximize risk-adjusted income from loans, this algorithm will provide guidelines for ‘risk management’ and ‘business’ functions on how to improve individual and overall efficiency. Methods. The study employs the discriminant analysis, type I and II errors, Lorentz curve modeling, statistical analysis, economic modeling. Results. The paper offers a mechanism for assessing the quality of risk management decisions as opposed to (or in support of) decisions of the lending business when approving transactions. The mechanism rests on the approach of stating type I and II errors and the corresponding classical metric of the Gini coefficient. On the ‘business’ side, the mechanism monitors the improvement or deterioration of the indicator of changes in losses in comparison with the market average. Conclusions. The study substantiates the stimulating ‘rules of the game’ between the ‘business’ and ‘risk management’ to improve the efficiency of the entire business, to optimize interactions within the framework of internal competition. It presents mathematical tools to calculate corresponding indicators of the efficiency of internally competing entities.

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The Development of Agritourism in the Podkarpackie Voivodeship in the Light of International and National Conditions

Przedsiębiorczość - Edukacja ◽

10.24917/20833296.13.18 ◽

2017 ◽

Vol 13 ◽

pp. 244-261

Author(s):

Mariola Tracz ◽

Małgorzata Bajgier-Kowalska ◽

Radosław Uliszak

Keyword(s):

Development Strategy ◽

Current State ◽

Central Statistical ◽

Central Statistical Office ◽

Tourism Resources ◽

The One ◽

The Impact ◽

District Offices ◽

Socio Economic Factors

Podkarpackie Voivodeship is one of the regions of Poland in which the number of agritourism entities is very high. Therefore tourism plays a significant role in its development strategy. The aim of the paper is to identify the current state of agritourism and the changes that have occurred in the region in the years 2000–2016. Specific objectives are to determine the distribution of agritourism farms and their offer, together with a comprehensive analysis of the environmental and socio-economic factors, as well as the impact of the Slovak-Ukrainian border. The report was developed on the statistical materials from the Polish Central Statistical Office, Podkarpackie Agricultural Advisory Centre in Boguchwała and data collected from municipalities and district offices that is published on their websites, as well as through interviews with 100 owners of agritourism farms in the Podkarpackie Voivodeship. The research has shown, on the one hand, the decline in the number of farms in the region and, on the other hand, the increase in the diversity of the tourist offer of these entities. Distribution of agritourism farms is closely linked to the attractiveness of natural environment and quality of secondary tourism resources. Traditional agritourism has not yet fully used its countryside, as well as cross-border advantages of its location.

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