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TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55

TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55

A non-stationary model of the steam-oxygen gasification of solid fuel in a fixed bed under pressure has been developed with allowance for the interphase convective heat exchange, radiation-conductive heat transfer of the solid phase, radiant and conductive heat exchange of the bed &nbsp;with the...

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Main Author: Rokhman, B.
Format: Article
Language:Ukrainian
Published: Institute of Renewable Energy National Academy of Sciences of Ukraine 2019
Subjects:
fixed bed
coal
thermal conductivity
steam-oxygen gasification
temperature.
неподвижный слой
уголь
теплопроводность
парокислородная газификация
температура.
Online Access:https://ve.org.ua/index.php/journal/article/view/192
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id veorgua-article-192
record_format ojs
institution Vidnovluvana energetika
collection OJS
language Ukrainian
topic fixed bed
coal
thermal conductivity
steam-oxygen gasification
temperature.
неподвижный слой
уголь
теплопроводность
парокислородная газификация
температура.
spellingShingle fixed bed
coal
thermal conductivity
steam-oxygen gasification
temperature.
неподвижный слой
уголь
теплопроводность
парокислородная газификация
температура.
Rokhman, B.
TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55
topic_facet fixed bed
coal
thermal conductivity
steam-oxygen gasification
temperature.
неподвижный слой
уголь
теплопроводность
парокислородная газификация
температура.
format Article
author Rokhman, B.
author_facet Rokhman, B.
author_sort Rokhman, B.
title TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55
title_short TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55
title_full TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55
title_fullStr TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55
title_full_unstemmed TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55
title_sort two-dimensional model of the solid fuel gasification in a fixed bed under presser. 1. investigation of shubarkol coal conversion in a steam-oxygen mixture with the mass part of h2о/o2=45/55
title_alt ДВУМЕРНАЯ МОДЕЛЬ ПРОЦЕССА ГАЗИФИКАЦИИ ТВЕРДОГО ТОПЛИВА В НЕПОДВИЖНОМ СЛОЕ ПОД ДАВЛЕНИЕМ. 1. ИССЛЕДОВАНИЕ КОНВЕРСИИ ШУБАРКОЛЬСКОГО КАМЕННОГО УГЛЯ В ПАРОКИСЛОРОДНОЙ СМЕСИ ПРИ ОТНОШЕНИИ МАССОВЫХ ДОЛЕЙ H2О/O2=45/55
description A non-stationary model of the steam-oxygen gasification of solid fuel in a fixed bed under pressure has been developed with allowance for the interphase convective heat exchange, radiation-conductive heat transfer of the solid phase, radiant and conductive heat exchange of the bed &nbsp;with the reactor wall, heterogeneous and homogeneous chemical reactions, gravity and aerodynamic resistance. Temperature distribution of the phases, diameter of the coal particles, concentrations of the gas components over the bed height as a function of time during the gasification of Shubarkol long-flame coal under a pressure of 3 MPa at a ratio of mass fractions in the oxygen-oxygen mixture H2О/O2 = 45/55 is obtained. The obtained information can be used in the design of reactors, commissioning modes and the gas generator operation at various loads, when the process of steam-oxygen coal gasification is non-stationary due to the cyclical fuel supply and ash discharge by using a system of lock bins. It has been shown that the section of the oxidizing zone, where the temperature of the coal particles reaches its maximum value, is very narrow and is 10-11 mm. Two alternative modes of the gas generator operation are proposed. The first mode H2О/O2 = 40/60 is associated with an increase in the maximum temperature of the particles in a small area adjacent to the reactor bottom from to 1550 °C, which makes it possible to organize stable liquid slag removal from the gas generator. The second mode H2О/O2 = 72/28&nbsp; is based on solid slag removal, when the temperature of the particles does not exceed 1000 °С. Referenses 11, tabl. 1, fig. 9.
publisher Institute of Renewable Energy National Academy of Sciences of Ukraine
publishDate 2019
url https://ve.org.ua/index.php/journal/article/view/192
work_keys_str_mv AT rokhmanb twodimensionalmodelofthesolidfuelgasificationinafixedbedunderpresser1investigationofshubarkolcoalconversioninasteamoxygenmixturewiththemasspartofh2oo24555
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first_indexed 2024-06-01T14:33:44Z
last_indexed 2024-06-01T14:33:44Z
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spelling veorgua-article-1922019-10-10T21:43:43Z TWO-DIMENSIONAL MODEL OF THE SOLID FUEL GASIFICATION IN A FIXED BED UNDER PRESSER. 1. INVESTIGATION OF SHUBARKOL COAL CONVERSION IN A STEAM-OXYGEN MIXTURE WITH THE MASS PART OF H2О/O2=45/55 ДВУМЕРНАЯ МОДЕЛЬ ПРОЦЕССА ГАЗИФИКАЦИИ ТВЕРДОГО ТОПЛИВА В НЕПОДВИЖНОМ СЛОЕ ПОД ДАВЛЕНИЕМ. 1. ИССЛЕДОВАНИЕ КОНВЕРСИИ ШУБАРКОЛЬСКОГО КАМЕННОГО УГЛЯ В ПАРОКИСЛОРОДНОЙ СМЕСИ ПРИ ОТНОШЕНИИ МАССОВЫХ ДОЛЕЙ H2О/O2=45/55 Rokhman, B. fixed bed, coal, thermal conductivity, steam-oxygen gasification, temperature. неподвижный слой, уголь, теплопроводность, парокислородная газификация, температура. A non-stationary model of the steam-oxygen gasification of solid fuel in a fixed bed under pressure has been developed with allowance for the interphase convective heat exchange, radiation-conductive heat transfer of the solid phase, radiant and conductive heat exchange of the bed &nbsp;with the reactor wall, heterogeneous and homogeneous chemical reactions, gravity and aerodynamic resistance. Temperature distribution of the phases, diameter of the coal particles, concentrations of the gas components over the bed height as a function of time during the gasification of Shubarkol long-flame coal under a pressure of 3 MPa at a ratio of mass fractions in the oxygen-oxygen mixture H2О/O2 = 45/55 is obtained. The obtained information can be used in the design of reactors, commissioning modes and the gas generator operation at various loads, when the process of steam-oxygen coal gasification is non-stationary due to the cyclical fuel supply and ash discharge by using a system of lock bins. It has been shown that the section of the oxidizing zone, where the temperature of the coal particles reaches its maximum value, is very narrow and is 10-11 mm. Two alternative modes of the gas generator operation are proposed. The first mode H2О/O2 = 40/60 is associated with an increase in the maximum temperature of the particles in a small area adjacent to the reactor bottom from to 1550 °C, which makes it possible to organize stable liquid slag removal from the gas generator. The second mode H2О/O2 = 72/28&nbsp; is based on solid slag removal, when the temperature of the particles does not exceed 1000 °С. Referenses 11, tabl. 1, fig. 9. Построена нестационарная модель процесса парокислородной газификации твердого топлива в фиксированном слое под давлением с учетом межфазного конвективного теплообмена, радиационно-кондуктивного теплопереноса твердой фазы, лучистого и кондуктивного теплообмена слоя со стенкой реактора, гетерогенных и гомогенных химических реакций, сил тяжести и аэродинамического сопротивления. Модель позволяет получить детальную информацию о распределении температур фаз, диаметра угольных частиц, концентраций газовых компонентов по высоте слоя в зависимости от времени при газификации шубаркольского каменного длиннопламенного угля под давлением 3 Мпа при отношении массовых долей в парокислородной смеси H2О/O2 = 45/55. Полученная информация может быть использована при конструировании реакторов, пуско-наладочных режимах и работе газогенератора на различных нагрузках, когда процесс парокислородной газификации угля является нестационарным из-за цикличности подачи исходного топлива и выгрузки золы при помощи использование системы шлюзовых бункеров. Показано, что участок окислительной зоны, где температура угольных частиц достигает максимального значения, очень узок и составляет 10-11 мм. Предложены два альтернативных режима работы газогенератора. Первый из них H2О/O2 = 40/60 связан с повышением максимальной температуры частиц в области, прилегающей к поду реактора до 1550 °С, что позволяет организовать устойчивое жидкое шлакоудаление из газогенератора. Второй режим H2О/O2= 72/28 основан на твердом шлакоудалении, когда температура частиц не превышает 1000 °С. Библ.11, табл.1, рис.9. Institute of Renewable Energy National Academy of Sciences of Ukraine 2019-03-18 Article Article application/pdf https://ve.org.ua/index.php/journal/article/view/192 10.36296/1819-8058.2019.1(56).61-71 Возобновляемая энергетика; № 1(56) (2019): Научно-прикладной журнал Возобновляемая энергетика; 61-71 Відновлювана енергетика; № 1(56) (2019): Науково-прикладний журнал Відновлювана енергетика; 61-71 Vidnovluvana energetika ; No. 1(56) (2019): Scientific and Applied Journal Vidnovluvana energetika; 61-71 2664-8172 1819-8058 10.36296/1819-8058.2019.1(56) uk https://ve.org.ua/index.php/journal/article/view/192/130 Copyright (c) 2019 Vidnovluvana energetika

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