Coal blending preparation for non-carbonized coal briquettes

Widodo, Widodo; Fatimah, Dewi; Estiaty, Lenny M.

doi:10.1088/1755-1315/118/1/012068

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Материалом для приготовления угольных брикетов служит мелочь из сухих, плохо спекающихся углей, которая не годится для непосредственного сжигания в топке [4]. Преимущества брикетирования угля: увеличение размеров угольного продукта; снижение количества выбросов в атмосферу при сгорании; в результате процесса бри-кетирования получается угольный брикет высокого качества со стандартными показателями; простота транспортировки и хранения; высокая теплоотдача в процессе сгорания угольного брикета; угольные брикеты легко воспламеняются и горят достаточно продолжительное время; решение проблемы самовозгорания мелочи в процессе хранения [5][6]. Главная задача при производстве угольных брикетов состоит в том, чтобы наиболее полно произвести смешивание угольной мелочи со смолой, которая из экономических соображений должна быть взята в минимальном количестве, но, однако, в таком, чтобы при прессовании брикетов получалась вполне пластичная масса [7][8].…”

Section: Introductionunclassified

Влияние Воздухопроводящих Каналов На Горение Угольных Брикетов

Ахинжанова¹

2023

Горение и Плазмохимия

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В результате исследований установлено, что увеличение площади поверхности горения в брикетах увеличивает скорость и полноту сгорания углей. Показана эффективность горения некондиционных углей в зависимости от увеличения площади горения. Установлен оптимальный образец брикета, при котором достигается наибольшая скорость и полнота сгорания. В данной работе были исследованы зависимости горения от формы воздушных каналов. Исследована зависимость температуры горения брикета от времени без воздушного канала и с воздушным каналами «Стержень» и «Звездочка». Наилучшими показателями по температуре 942 0С и времени горения 50 минут обладают брикеты с воздушным каналом «Звездочка». Все исследованные нами угольные брикеты являются не чувствительными к удару, что облегчает транспортировку данных брикетов.

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Section: Introductionunclassified

Влияние Воздухопроводящих Каналов На Горение Угольных Брикетов

Ахинжанова¹

2023

Горение и Плазмохимия

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“…Carrying out coal briquetting provides certain advantages: an increase in the size of the coal product; reduction of emissions into the atmosphere during combustion; obtaining high quality coal briquette with standard indicators; easiness of transportation and storage; high heat emission in the process of burning coal briquette; coal briquettes are easily ignited and burn for a quite long time; it solves the problem of spontaneous combustion of fines during storage. [8][9][10] The material for the preparation of coal briquettes is a coal fine of dry, poorly fusible coals, which cannot be used for direct combustion in the furnace. 11,12 The main task in the production of coal briquettes is to make the most complete mixing of coal fines with tar, which for economic reasons must be taken in a minimum amount, but, however, in such that a compact mass is obtained when pressing briquettes.…”

Section: Introductionmentioning

confidence: 99%

Physical and Mathematical Models of Target Component Extraction from Rectlinear Capillaries

Гумницький¹,

Venger²,

Sabadash³

et al. 2022

ChChT

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The extraction of the solid component from the rectilinear capillary has been investigated. The presence of two extraction zones (convective and molecular diffusion) was confirmed. The effect of the system vacuumizing on the extraction rate has been studied. The convection zone during vacuumizing was found to be increased due to the appearance of the vapor phase bubbles. The mass transfer coefficients for the convective zone have been determined. A mathematical model of the molecular diffusion stage is given, taking into account the nonlinear change in the component concentration in the liquid due to the displacement of the extraction boundary. The molecular diffusion coefficients in the capillary have been determined.

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“…Producing coal briquettes is one of the most perspective solutions for recycling non-standard coal and coal fines. Briquetting makes it possible to dispose of unclaimed small coal fractions, improve the quality and thermal characteristics of the fuel as a result of briquetting with a significant increase in the completeness of combustion, reduce environmental pollution 6,[14][15][16][17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optimization of combustion of briquettes based on substandard brown coals of Kazakhstan deposits with multipolymer binders

et al. 2020

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The work aimed to study the process of burning coal briquettes with polymers. As the object of the research, the coals of Kazakhstan deposits were applied. The methodology of the study included theoretical and computational studies on the applied significance of coal processing, analysis by physicochemical research methods, pressing, drying and briquetting of coal with binders. It is shown that the briquettes combustion takes place stepwise and is characterized by a stationary regime. This is due to the mutual influence of the stages of pyrolysis of polyolefins and combustion of coke residue of substandard coal. In the combustion zone, the temperature did not depend on the content of polyethylene and was 400–500ºC in the coal burnout zone. The optimal compositions of briquettes supporting the combustion temperature of 1300°С were determined: coal-40 %, clay-20 %, polyethylene-40 %. Adding up to 20% clay to the polymer and coal mixture led to the formation of a combustion wave structure with symmetric temperature profiles. Thermogravimetric analysis shows that polyethylene plays the role of the initiator of combustion, burning at 500ºC, and in the future does not affect the maintenance of the combustion temperature of the briquette. The perspective of the results obtained is the possibility of utilization of low-demand coals of various brands of Kazakhstan deposits, which are waste of coal mining and coal enrichment with further production of coal briquettes of the required quality. Coal briquettes made from substandard coals with a multi-polymer binder, from chemical production waste have a higher calorific value, are mechanically robust during prolonged storage, do not crumble in the furnace until complete combustion, and are waterproof. These advantages determine their use for the population, as well as for various purposes of industrial economy, metallurgy and chemical industry.

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Coal blending preparation for non-carbonized coal briquettes

Cited by 6 publications

References 2 publications

Влияние Воздухопроводящих Каналов На Горение Угольных Брикетов

Влияние Воздухопроводящих Каналов На Горение Угольных Брикетов

Physical and Mathematical Models of Target Component Extraction from Rectlinear Capillaries

Synthesis and optimization of combustion of briquettes based on substandard brown coals of Kazakhstan deposits with multipolymer binders

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