Relevant bibliographies by topics / Rectification column

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  2. Dissertations / Theses
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Academic literature on the topic 'Rectification column'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Rectification column"

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Klykov, M. V., and T. V. Alushkina. "Development of Technological Schemes for Increasing the Selection of Vacuum Gas Oil." Chemistry and Technology of Fuels and Oils 625, no. 3 (2021): 17–20. http://dx.doi.org/10.32935/0023-1169-2021-625-3-17-20.

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The analysis of the operation of the vacuum columns of the ELOU AVT units showed that in a number of cases the half-gas contains up to 30% of vacuum gas oil with a boiling point of up to 560 ° C. A comparative analysis of three options for deepening the selection of heavy vacuum gas oil during the distillation of fuel oil has been carried out. A traditional scheme with a pressure reduction at the top of the vacuum column, the rectification of a half-sludge without heating it after the main vacuum column in an additional its subsequent rectification in the second column, with the selection of heavy vacuum gas oil. The analysis of the operation of the vacuum column of the vacuum rectification unit ELOU AVT-6 was carried out. The process was simulated in the environment of the software product Aspen HYSYS, the possibility of increasing the selection of heavy vacuum gas oil in the process of deep vacuum rectification of tar was theoretically proved. The advantages and disadvantages of two-column vacuum distillation of fuel oil are considered. Structural design of the rectification column and raw material input device is proposed.
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Kh Kurbangaleeva, M. "Improving the Safety of the Rectification Unit for the Production of Alkylphenols." IOP Conference Series: Earth and Environmental Science 988, no. 2 (February 1, 2022): 022007. http://dx.doi.org/10.1088/1755-1315/988/2/022007.

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Abstract As a result of the study, the analysis of occurrence of fire hazardous situation during the operation of rectification column of production facility of one of the city’s enterprises was carried out. This installation refers to facilities for which additional safety requirements are imposed. The main danger of the operation of rectification columns and their piping used at the installation is thefear of depressurization and theinitiation of gas contamination and fire situation on the site. As theresult of the fire, the rectification column and supporting metal structures can be in flame or be under the influence of thermal radiation from the flame in adjacent column, which can lead to the collapse of structures or to losses of bearing capacity under the influence of high temperatures. Depending on the height of the column, the water supply system can have different ways of distributing water: at small height of the column, manual water nozzles are used with the use of fire hydrants; at considerable height of the columns, stationary water irrigation systems (irrigation rings) are used.
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Jaric, Marko, Sanja Petronic, Nikola Budimir, Katarina Colic, and Lazar Jeremic. "Analysis of the estimated remaining service life of gas rectification columns." Thermal Science, no. 00 (2021): 83. http://dx.doi.org/10.2298/tsci201214083j.

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Gas rectification columns are process apparatuses which are very important part of each onshore plant. Sudden failure of these types of columns causes huge daily losses, while fluid leakage can be very dangerous for the people and hazardous for the environment. For that reason, a regular and correct examination of the column is of great importance for the continual process of leading. Together with the detailed examination of the column, a risk-based inspection was applied to maximize savings, both material, time, and costs. The expected remaining service life of rectification columns was also analyzed, while the corrosion rates were calculated according to the various international standards. The minimum required column wall thickness was calculated according to the most commonly used international standard and the obtained difference was analyzed. Detailed analysis of the total risks of the column due to potential failure is presented.
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Petronić, Sanja, Katarina Čolić, Arko Jarić, Nebojša Ćurčić, Zijah Burzić, and Svetozar Sofijanić. "Safety factors in wall thickness calculation of rectification columns." Scientific Technical Review 71, no. 1 (2021): 3–7. http://dx.doi.org/10.5937/str2101003p.

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Gas rectification columns are a very important part of each onshore plant. Their sudden failures cause huge losses on a daily basis, while fluid leakage can be very dangerous to people and environment. For that reason, the proper design of the column is of huge importance, among the others safety factors as well. In this paper, the wall thickness measure is presented with the aim to calculate corrosion rate and remaining life of rectification columns. The minimum required column wall thickness was calculated according to the most commonly used international standard and the obtained difference was analyzed.
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Markowski, Mariusz, and Sandra Storczyk. "Minimum Compressor Shaftwork in the Refrigeration System Thermally Coupled with a Rectification Column Network." Applied Mechanics and Materials 797 (November 2015): 415–23. http://dx.doi.org/10.4028/www.scientific.net/amm.797.415.

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There is considered the thermal separation of hydrocarbon mixtures using the rectification columns coupled, via a heat exchanger network, with a refrigeration circuit. Using the approach based on Pinch Technology, the minimum is sought of compressor shaftwork in the refrigeration system. The objective function is defined as the entropy increment resulting from the heat exchange in the heat exchanger network. The decision variables are the temperature levels of heat sinks and sources in the refrigeration cycle. An algorithm is proposed for determining the optimal values of the temperature levels of heat sources and sinks corresponding to the minimum of compressor shaftwork. The rectification columns are modeled using the ideal column approach. The numerical simulation is carried out by performing composite curves and selecting temperature levels in the refrigeration system so as to minimise the objective function. The test example is solved for a mixture of selected hydrocarbons (ethane, ethene, propene) to be separated in a sequence of rectification columns coupled with a refrigeration system. Assuming that structure of the rectification column network is known, process parameters are determined for minimum compressor shaftwork. Numerical results of the test example are presented.
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Natig Abbasov, Natig Abbasov, and Rufet Ezizli Rufet Ezizli. "IMPROVING THE EFFICIENCY OF THE STABILIZATION COLUMNS IN OIL AND GAS PROCESSING." ETM - Equipment, Technologies, Materials 10, no. 02 (April 2, 2022): 81–89. http://dx.doi.org/10.36962/etm10022022-81.

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Rectification process is widely used in oil and gas processing and petrochemistry. The composition of the bottom product of the rectification column usually differs from the equilibrium composition due to significantly higher content of light components or fractions. This stipulates a necessity to include into the technological schemes of several oil refining processes a stabilization unit that are meant to ensure separation of gases and liquid products. A highly relevant task is to explore new possibilities for improving the stabilization process. The aim of the present work was to improve the stabilization process by changing the operating pressure. It was found that increasing the pressure in the stabilization column enhanced the sharpness of separation of butanes from pentanes, which resulted in improving the quality of the products. The experimental-industrial runs confirmed the possibility of increasing the efficiency of stabilization columns in various processes by increasing the pressure within acceptable limits. Keywords: rectification process, sharpness of separation, stabilization column, pressure.
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Ibragimova, Ramilya, Vitaliy Afanasenko, Gleb Kudryavtsev, and Denis Mazidullin. "Use of numerical modeling methods in desing of combined rectification column." MATEC Web of Conferences 298 (2019): 00070. http://dx.doi.org/10.1051/matecconf/201929800070.

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The article is devoted to the study of methods for modeling the operation of rectification columns using the HYSIS application software package. Such studies are very important not only for design, but also for the functioning of existing industries. The article proposes to use for combining nozzle devices in the concentration part of the column, and plate-shaped structures in the distant part of the column for more efficient and stable operation of distillation columns. To determine the hydrodynamic parameters of the operation of distillation column, a technique of determining the range of stable loads and the position of the operating point inside or outside the range of stable loads was taken. A column model was constructed using the HYSYS software package for separating gas mixtures with various contact devices: sieve trays, Rashig ring nozzles. Experiments for the same type and combined contact devices were carried out and their comparison was carried out in terms of hydraulic calculation and operating range. As a result of experiments with the use of the HYSYS software package, it was shown that the combined arrangement of contact devices can provide a stable hydraulic mode, in contrast to the use of similar contact devices.
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Bulii, Y. V., O. M. Obodovych, and V. V. Sydorenko. "INCREASING THE DEGREE OF EXTRACTION OF ORGANIC IMPURITIES OF RECTIFIED ALCOHOL." Thermophysics and Thermal Power Engineering 43, no. 1 (March 4, 2021): 68–74. http://dx.doi.org/10.31472/ttpe.1.2021.8.

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Obtaining high quality rectified ethyl alcohol is a priority for the further development of the alcohol industry. The solution to this urgent problem is possible under the condition of deeper extraction and concentration of volatile alcohol impurities on the plates of the column equipment of the Distillation/Rectification Unit. In the columns of the Distillation/Rectification Unit simultaneously with the release of volatile alcohol impurities due to the esterification reaction is the formation of organic compounds that degrade its quality and reduce the yield of the final product. Thus, during the interaction of alcohols, acids, and aldehydes, the breakdown products of amino acids, sulfur compounds, and other components of the brew in the fermentation column are the formation of esters, aldehydes, and acetals of organic acids. The aim of the work was to determine the optimal technological modes of distillation of alcohol-containing intermediate products and by-products of the distillation/rectification process in the accelerating column, epuration of wash distillate in the epuration column, the concentration of rectified alcohol in the alcohol column, and its repeated epuration in the column of final clearance, under which the content of organic impurities in rectified ethyl alcohol would be the lowest. Materials and methods. Research methods were analytical, chemical, physico-chemical with the use of instruments and research methods used in the production of rectified ethyl alcohol. The concentration of volatile alcohol impurities was determined on a gas chromatograph with a column of HP FFAP 50 m × 0.32 m. It is determined that to increase the degree of extraction of organic impurities it is necessary to ensure the concentration of ethyl alcohol in the column bottom of the accelerating column, which does not exceed 4% vol.; pasteurization zone in the rectification column increase to 10 plates, reduce the concentration of ethanol in the epurate to 22-29% by hydroselection of impurities; for hydroselection in the epuration column use free of impurities bottom products of the accelerating column. To improve the quality of rectified alcohol and reduce energy consumption by extending the contact time on the plates of steam and liquid, a promising direction is the use of mass transfer equipment of cyclic mode. The proposed measures require constant monitoring of technological parameters and provide for the operation of technological equipment in an automated mode.
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Voinov, Nikolay Aleksandrovich, Denis Andreyevich Zemtsov, Anastasiya Viktorovna Bogatkova, and Nina Vladimirovna Deryagina. "INTENSIFICATION OF HEAT EXCHANGE IN DIABATIC RECTIFICATION COLUMNS." chemistry of plant raw material, no. 4 (December 21, 2020): 511–18. http://dx.doi.org/10.14258/jcprm.2020048580.

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The heat exchange in a diabatic column was investigated during the rectification of an ethanol-water mixture, in which partial condensation of rising vapors on the surface of vertical heat exchange tubes installed vertically along the height of the installation was carried out, as well as the evaporation of intermediate condensate on the surface of horizontal plates. Based on the review of diabatic columns, it is shown that they can reduce the cost of conducting the rectification process. Heat-exchange devices placed on trays of rectification units are considered and ways to intensify heat transfer in them are proposed. It has been established that the most efficient heat removal in heat exchangers of diabatic columns is achieved when using a film flow of a coolant on a heat transfer surface. Heat transfer in a diabatic column is investigated during gravitational flow of surfaces of heat exchange tubes, as well as when organizing an ascending and descending co-current film flow, both in the case of heating and boiling of the coolant. To intensify heat transfer in the coolant film, a helical artificial roughness was installed on the surface of the pipes, made in the form of a wire spiral tightly mounted on the heat transfer surface. The geometric parameters of the helical roughness, such as the distance between the turns of the spiral and the height of the wire, which have the greatest influence on the intensity of heat transfer, have been established. Dependences for determining the value of the heat transfer coefficient are presented and an estimate of the value of the specific heat flux in the diabatic column is given.
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Zhang, Zheng Hui, and Qiu Chen. "Studies on Citronellal Extract Column Reflux Ratio and Theoretical Plate Number Design." Advanced Materials Research 773 (September 2013): 331–35. http://dx.doi.org/10.4028/www.scientific.net/amr.773.331.

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In this paper, the batch rectification operation is adopted to keep distillate constituting constant high vacuum, in the operation process, the operation of variable reflux ratio is carries out. Through studying the relational system of reflux ratio, column top product composition, rectification time and theoretical plate number, when the concentration of citronellal extract column product is 99%, the appropriate reflux ratio is 0.8-15, and the graphic method is used to design13 pieces of theoretical plate number of citronellal extract column, providing powerful data support for the process design of citronellal extract column.
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Dissertations / Theses on the topic "Rectification column"

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Брусак, Василь Юрійович. "Автоматизація установки каталітичного крекінгу з прямоточним реактором." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/29050.

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Дипломний проект бакалавра на тему: «Автоматизація установки каталітичного крекінгу з прямоточним реактором» містить пояснювальну записку об ̓ємом 61 сторінок, специфікацію для функціональної схеми об ̓ємом 4 сторінок. Пояснювальна записка містить 5 розділів, 1 додаток та 11 літературних джерел. В дипломному проекті бакалавра виконаний аналіз технологічної схеми каатлітичного крекінгу з прямоточним реактором, як об ̓єкта автоматизації. Розроблено функціональну схему автоматизації для цього ж процесу, принципову електричну схему аварійного захисту і технологічного блокування електродвигунів, принципово електричну схему технологічної сигналізації контрольованих параметрів. В роботі розглянуто особливості роботи ректифікаційної колони, як об ̓єкта керування. Для цього ж апарату розроблено математичну модель статичного та динамічного режиму роботи. За допомогою цієї моделі виконані розрахунки статичних характеристик по каналу збурення і керування. Виконано синтез системи керування. В цьому ж розділі зроблені висновки та рекомендації по використанню тих чи інших регуляторів. При виконанні дипломного проекту були використані методи теорії автоматичного керування, математичного моделювання. Основні результати роботи можуть бути використані для попередньої оцінки параметрів налаштування реальних систем керування.
Bachelor's degree project on the theme: «Automation of catalytic cracking installation with a direct current reactor» includes an explanatory note Capacity 61 pages, the specification for functional circuits Capacity 4 pages. Explanatory note contains 5 chapters, appendix and 11 references. Bachelor's degree project in the analysis of catalytic cracking installation with a direct current reactor, as the object of automation. The functional diagram for automating this process and is essentially an electrical circuit, remote control, emergency protection and technology block, fundamentally electric circuit of technological signaling. In operation rectification column, as objects of control. For the same apparatus the mathematical models of static and dynamic modes. With these models, calculations of static characteristics of disturbance and control channels. Done synthesis control system. In the same section, conclusions and recommendations on the use of certain regulators. In the performance diploma methods were used control theory, mathematical modeling. The results of theses published in international conferences. The main findings can be used to estimate the parameters of real systems configuration management.
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Bartlok, Guido. "Untersuchungen zur Neuverteilung der Rücklaufflüssigkeit in Packungskolonnen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2002. http://nbn-resolving.de/urn:nbn:de:swb:14-1038918418015-57600.

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Bei der Rektifikation werden heute zunehmend Füllkörperkolonnen mit geordneten Packungen eingesetzt. Die Maldistribution, ein bislang ungelöstes Problem in Füllkörperkolonnen, wirkt sich negativ auf die Stoffaustauschleistung aus. Zur Verringerung der Maldistribution wird zwischen den Packungssektionen mehrfach die Rücklaufflüssigkeit gesammelt und erneut gleichmäßig über den Kolonnenquerschnitt verteilt. Diese Neuverteilung realisieren Zwischenverteiler, die somit einen Großteil der Kolonnenhöhe beanspruchen und damit die Investitions- und Betriebskosten erheblich erhöhen. Hauptursache für die Bauhöhe der Zwischenverteiler ist der Wunsch nach einem vollständigen Konzentrationsausgleich vor der Neuverteilung. Um die Kolonnenhöhe zu verringern und dennoch die gleiche Trennleistung zu erreichen, mangelt es den Anlagenbauern bislang an einer praktikablen Lösung. Entgegen der bisherigen Lehrbuchmeinung wird in dieser Arbeit die Bedeutung des vollständigen Konzentrationsausgleich grundsätzlich in Frage gestellt. Es erfolgen deshalb theoretische und experimentelle Untersuchungen für ein besseres Verständnis der Neuverteilung der Rücklaufflüssigkeit und deren Auswirkung auf die Trennleistung. Durch Modifizierung des klassischen Zwei-Kolonnen-Modells gelingt es, den Einfluss der Maldistribution, der Dampfquervermischung und der hydraulisch gleichmäßigen Flüssigkeitsneuverteilung mit und ohne vollständigen Konzentrationsausgleich numerisch zu simulieren. Die Überprüfung der Simulationsmodelle erfolgt an einer Pilotkolonne mit einem inneren Durchmesser von 1 m. Die Kolonne ist mit Sulzer MellapakPlus 752.Y ausgerüstet und als Testgemisch dient trans-/cis-Dekalin. Im Ergebnis zeigt sich, dass vor allem der hydraulische Ausgleich erforderlich ist und es praktisch keinen Unterschied zwischen vollständigen und unvollständigen Konzentrationsausgleich bei sonst gleichen Betriebsbedingungen gibt. Überlegungen für deutlich flachere Verteilerkonstruktionen werden vorgestellt.
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Бабенко, Володимир Миколайович. "Закономірності гідродинаміки і масообміну в процесах ректифікації суміші розчинників на новому контактному пристрої." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22718.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.08 – процеси та обладнання хімічної технології. – Національний технічний університет "Харківський політехнічний інститут" Міністерства освіти і науки України, м. Харків, 2016. Дисертацію присвячено дослідженню процесу поділу рідинних гетерогенних сумішей на регулярних контактних пристроях з різними геометричними параметрами насадочних елементів. Досліджено механізм процесу утворення рідинної плівки для колонних апаратів, що застосовуються в ректифікації у відповідності з гідродинамічними характеристиками процесу. Показано, що основним фактором інтенсифікації масообмінного процесу для регулярних контактних елементів, є швидкість відновлення рідинної плівки. Доведено що, основними факторами, які визначають ефективність процесу поділу суміші розчинників, є низький питомий опір апарату по газу і конструктивні особливості контактних елементів ректифікаційній колони. Отримано графічні та емпіричні залежності для розрахунку висоти насадочного шару, питомої поверхні насадки в залежності від лінійної швидкості газу в колонному апараті і геометричних параметрів насадочних пристроїв. Розроблено практичні рекомендації для проектування колонних установок з високими енергетичними показниками. Запропоновано новий регулярний контактний елемент, який поєднує в собі велику питому поверхню з малим гідродинамічним опором. Запропоновано принципову апаратурно-технологічну схему процесу поділу суміші розчинників, яка розроблена й впроваджена на виробництві ПАТ "ФАРМСТАНДАРТ-БІОЛІК" (м. Харків).
Dissertation for the degree of candidate of engineering sciences on specialty 05.17.08 – processes and equipment of chemical technology. – National technical university "Kharkiv Polytechnic Institute" of the Ministry of Education and Science of Ukraine, Kharkiv, 2016. The dissertation is dedicated to the study of the separation process of liquid heterogeneous mixtures on the regular contact devices with different geometric parameters of the packing elements. The mechanism of the liquid film formation for the column apparatuses utilized in rectification is investigated according to the hydrodynamic characteristics of the process. It is shown that the main factor in the intensification of mass transfer processes for regular contact devices is velocity recovery of the liquid film. It is proved that the main factors of the solvent mixture separation efficiency are low specific resistance of an apparatus for a gas and constructional characteristics of the contact devices of a rectification column. Graphical and empirical relationships are obtained to calculate height of the packed bed, specific surface of a nozzle, depending on the linear gas velocity in a column apparatus and geometric parameters of the packing devices. Practical recommendations for the design of column units with high energy performance are developed. A new regular contact element that combines large surface area with low hydrodynamic resistance is suggested. A process flow diagram of the solvent mixtures separation is given, which was developed and implemented in the production line of PJSC "PHARMSTANDARD-BIOLIK" (Kharkiv city).
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Бабенко, Володимир Миколайович. "Закономірності гідродинаміки і масообміну в процесах ректифікації суміші розчинників на новому контактному пристрої." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22717.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.08 – процеси та обладнання хімічної технології. – Національний технічний університет "Харківський політехнічний інститут" Міністерства освіти і науки України, м. Харків, 2016. Дисертацію присвячено дослідженню процесу поділу рідинних гетерогенних сумішей на регулярних контактних пристроях з різними геометричними параметрами насадочних елементів. Досліджено механізм процесу утворення рідинної плівки для колонних апаратів, що застосовуються в ректифікації у відповідності з гідродинамічними характеристиками процесу. Показано, що основним фактором інтенсифікації масообмінного процесу для регулярних контактних елементів, є швидкість відновлення рідинної плівки. Доведено що, основними факторами, які визначають ефективність процесу поділу суміші розчинників, є низький питомий опір апарату по газу і конструктивні особливості контактних елементів ректифікаційній колони. Отримано графічні та емпіричні залежності для розрахунку висоти насадочного шару, питомої поверхні насадки в залежності від лінійної швидкості газу в колонному апараті і геометричних параметрів насадочних пристроїв. Розроблено практичні рекомендації для проектування колонних установок з високими енергетичними показниками. Запропоновано новий регулярний контактний елемент, який поєднує в собі велику питому поверхню з малим гідродинамічним опором. Запропоновано принципову апаратурно-технологічну схему процесу поділу суміші розчинників, яка розроблена й впроваджена на виробництві ПАТ "ФАРМСТАНДАРТ-БІОЛІК" (м. Харків).
Dissertation for the degree of candidate of engineering sciences on specialty 05.17.08 – processes and equipment of chemical technology. – National technical university "Kharkiv Polytechnic Institute" of the Ministry of Education and Science of Ukraine, Kharkiv, 2016. The dissertation is dedicated to the study of the separation process of liquid heterogeneous mixtures on the regular contact devices with different geometric parameters of the packing elements. The mechanism of the liquid film formation for the column apparatuses utilized in rectification is investigated according to the hydrodynamic characteristics of the process. It is shown that the main factor in the intensification of mass transfer processes for regular contact devices is velocity recovery of the liquid film. It is proved that the main factors of the solvent mixture separation efficiency are low specific resistance of an apparatus for a gas and constructional characteristics of the contact devices of a rectification column. Graphical and empirical relationships are obtained to calculate height of the packed bed, specific surface of a nozzle, depending on the linear gas velocity in a column apparatus and geometric parameters of the packing devices. Practical recommendations for the design of column units with high energy performance are developed. A new regular contact element that combines large surface area with low hydrodynamic resistance is suggested. A process flow diagram of the solvent mixtures separation is given, which was developed and implemented in the production line of PJSC "PHARMSTANDARD-BIOLIK" (Kharkiv city).
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Books on the topic "Rectification column"

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Packed Bed Columns: For absorption, desorption, rectification and direct heat transfer. Elsevier Science, 2006.

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Conference papers on the topic "Rectification column"

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Buliy, Yuriy, and Anatoly Kuts. "Cyclic rectification technology in column mass exchange apparatuses with perforated plates." In Resource and Energy Saving Technologies of Production and Packing of Food Products as the Main Fundamentals of Their Competitiveness: Proceedings of the 7th International Specialized Scientific and Practical Conference. National University of Food Technologies, 2019. http://dx.doi.org/10.24263/res-2019-7.

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Zhang, Yan, Chao Yingliu, Xueling Song, and Zhifei Yan. "Application of RBF Neural Network PID Controller in the Rectification Column Temperature Control System." In 2013 6th International Symposium on Computational Intelligence and Design (ISCID). IEEE, 2013. http://dx.doi.org/10.1109/iscid.2013.132.

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Guo, Tongshu, Jianhong Lu, Ke Wu, Ying Guo, Wenguo Xiang, Guoyao Liu, and Rui-Feng Cao. "Modeling and Simulation of the Low-Pressure Rectification Column in an IGCC Power Plant." In 2009 Asia-Pacific Power and Energy Engineering Conference. IEEE, 2009. http://dx.doi.org/10.1109/appeec.2009.4918498.

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4

BAI, PENG, JING FANG, JUNFENG YAO, and MIN SHENG. "DESIGN AND OPERATION OF A BATCH EXTRACTIVE RECTIFICATION COLUMN WITH A BOTTOM EQUILIBRIUM DISTILLATION STILL." In Proceedings of the 4th International Conference. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702623_0036.

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5

Takao, Manabu, Hideki Sato, Miah Md Ashraful Alam, Shinya Okuhara, Genya Masaki, and Toshiaki Setoguchi. "A Twin Unidirectional Impulse Turbine for Wave Energy Conversion: Effect of Rotor Blade Profile on the Performance." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-11573.

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Abstract:
There is a twin unidirectional impulse turbine topology in an oscillating water column for wave energy conversion, which has two unidirectional impulse turbines. In this topology, an oscillating airflow is rectified by these turbines. Previous studies show that the mean efficiency of this topology is predicted to be lower than the efficiency of a unidirectional impulse turbine. Therefore, the rectification of this topology needs more improvement. The objective of this study is to investigate the effect of the rotor blade profile on the performance of twin unidirectional impulse turbine by a wind tunnel test and computational fluid dynamics (CFD). In this study, 2 types of the rotor blade profiles in two cases of setting angles of guide vanes has been examined. As a result, the peak efficiency of Type A with θ = 14° was the highest of all turbines tested in this study. Furthermore, the flow state around the rotor and the guide vane is discussed.
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Sato, Hideki, Manabu Takao, Shinya Okuhura, Miah Md Ahsraful Alam, and Toshiaki Setoguchi. "A Twin Unidirectional Impulse Turbine With Fluidic Diode for Wave Energy Conversion." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-22585.

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As an air turbine equipped with oscillating water column (OWC) based wave energy plant, a rectification-valve system has been invented to date. However, this turbine system has problems with the durability of the valves and the complex mechanism. Moreover, it has a major fault in that the valves must be large for high output. Therefore, a twin unidirectional impulse turbine topology has been suggested in previous studies in order to use conventional unidirectional turbines without valves [1, 2]. The topology is composed of two unidirectional impulse turbines. However, the past study indicated that the mean efficiency of the topology was shown to be low, when the performance prediction of the topology in oscillating airflow was carried out by means of quasi-steady analysis [2]. Further, the cause of the low efficiency is because part of the air flow gets through the unidirectional impulse turbine in the direction of low efficiency [2]. In this study, a fluidic diode [3, 4] is adopted in order to suppress the air flow rate into the inefficient turbine in a twin unidirectional impulse turbine topology for wave energy plant, and the effect of the fluidic diodes on the performance of twin unidirectional impulse turbine topology is investigated by a wind tunnel test and computational fluid dynamics (CFD). Further, its usefulness is discussed from a view point of the turbine mean efficiency under unsteady flow condition.
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Kállai, Viktória, Gábor L. Szepesi, and Péter Mizsey. "Propylene-Propane Rectification Column's Examination." In MultiScience - XXXIII. microCAD International Multidisciplinary Scientific Conference. University of Miskolc, 2019. http://dx.doi.org/10.26649/musci.2019.044.

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Abramkin, Sergey E., and Yuriy N. Serditov. "A software module for investigating nonlinear heat transfer processes in rectification columns of packed type." In 2017 IEEE II International Conference on Control in Technical Systems (CTS). IEEE, 2017. http://dx.doi.org/10.1109/ctsys.2017.8109564.

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