Development of the method of exposure control of grain drying in high­temperature dryers

Volkhonov, Mikhail; Jabbarov, Igor; Soldatov, Valery; Смирнов, И. А.

doi:10.15587/1729-4061.2018.133607

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…Drying and structuring of mixtures ki netics are fundamental knowledge with great practical value. Having such data, drying method has been chosen, mode and energy consumption of drying process have been optimized [3], number of necessary equipment has been calculated [4], amount and types of moisture in materials being dried have been determined [5], etc.…”

mentioning

confidence: 99%

Kinetics of quartz sand and its mixtures drying by microwave radiation

Solonenko¹,

Repiakh²,

Uzlov³

et al. 2021

Nauk. visn. nat. hirn. univ.

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Purpose. Kinetics research and description of drying by microwave radiation mechanism development of quartz sand and its mixes with sodium silicate in limited quantity of water steam medium. Methodology. Distilled water, sodium silicate solute and quartz sand have been used in this research. Study has been performed on sand samples weighing 200 g. Mixtures drying and structuring have been performed by microwave radiation with power of 700W with frequency of 2.45 GHz in air and in saturated water weighing 1 g steam medium. Accuracy of temperature measurement is 1, mass is 0.02 g. Realized in this investigation drying kinetics has been specified as specimen weight change dependence and moisture evaporation from this mixture rate vs. drying duration. Dependencies have been built on the results of video recording and corresponding chrono-gravimetric measurements data digitalization. Mixtures during heating by microwave radiation temperature changes registration has been performed with an interval of 1560 s. Samples average heating rate has been estimated by calculation based on results in their temperature change determination during first 2 minutes of heating with microwave radiation. Findings. For the first time, microwave drying kinetics of quartz sand and its mixtures with sodium silicate in limited water medium (structured by SMS-process) has been studied. For the first time, based on SMS-process material balance, analytical dependence has been developed. This dependence application allows sand-sodium-silicate mixture structured by SMS-process maximum mass to calculate when using sodium silicate solute (silicate module 2.83.0) for quartz sand cladding and 1 g of saturated water steam for mixture structuring. It has been established that when mixtures structuring according to SMS-process water extraction from them takes place in three stages at ~100, 100108 and at 125138 . Maximum appropriate heating temperature of sand-sodium-silicate mixture during structuring by SMS-process has been recommended as ~125 . Exceeding of specified temperature leads to hydrated water from mixture releasing in steam form and its condensation on colder working surface of model-rod rigging. Resulting condensate leads to mixture restructuring in contact with equipment places and, accordingly, sharp quality deterioration in prepared molds and rods. For manufactured molds and rods quality stabilization, it has been recommended to pre-dry the quartz sand cladded with sodium silicate solute in microwave field for at least 3 minutes before structuring according to SMS-process. Originality. For the first time, data on drying kinetics has been obtained and quartz sand and its mixtures with sodium silicate in limited water steam medium microwave drying mechanism description has been developed. Influence of number of SMS-process basic parameters on structured quartz sand weight regularities has been established. Practical value. Research results will be useful in terms of ideas expanding about the processes that accompany granular materials drying, as well as in technologies and equipment for drying and structuring fine-grained dielectric materials and their mixtures development, creating new capillary-porous media, etc. under microwave radiation influence.

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mentioning

confidence: 99%

Kinetics of quartz sand and its mixtures drying by microwave radiation

Solonenko¹,

Repiakh²,

Uzlov³

et al. 2021

Nauk. visn. nat. hirn. univ.

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“…The study results are a continuation of development of a new grain drying equipment [17]. In the future, it is possible to use these results in substantiation and building mobile facilities for post-harvest processing of grain and grass seeds.…”

Section: Discussion Of Results Obtained In the Study Of The Device For Accepting And Drying Soya Seedsmentioning

confidence: 59%

Design and study of equipment for accepting and drying soya seeds with high moisture content

Volkhonov

Смирнов

Maksimov

2019

EEJET

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Вивчені конструкції існуючого обладнання для післязбиральної обробки не дозволяє проводити дбайливий прийом і сушку високовологе насіння сої, що призводить до зниження якості і втрати врожаю. Для вирішення даної проблеми було розроблено і виготовлено мобільний пристрій для прийому і сушки за один пропуск високовологої купи сої -тканинний аерожолоб. Розроблений пристрій з низькою металоємністю конструкції забезпечує прийом, сушіння і транспортування високовологого насіння. Зазначені переваги досягнуті шляхом застосування в конструкції додаткових повітропідводячих каналів і використання тканих матеріалів, в тому числі зі збільшеним до 46 % коефіцієнтом живого перетину -тканинних сит. У зволоженій зоні найбільш відповідальна операціясушка вологого матеріалу. Використання існуючих приймальних відділень і пристроїв для сушіння і вентилювання насіння зернобобових культур не забезпечує якості і зниження собівартості сушіння високовологого насіння в зонах підвищеного зволоження. Використання додаткових каналів підведення повітря з тканинних сит в конструкції тканинного аерожолоби дозволяє додатково збільшити подачу агента сушіння в шар купи на 60 %. Конструкція сушильної камери забезпечує високу рівномірність сушіння з відхиленням відносної вологості насіння сої не більше 1,2 % і збільшення їх схожості до 4,5 %. Застосування розробленого тканинного аерожолоби дозволяє приймати і якісно без травмування за один пропуск сушити високовологе насіння сипучих культур різних за масою партій -від 2 до 10 тонн з найменшими енерговитратами. Особливості конструкції відкривають можливості його використання в зонах підвищеного зволоження на підприємствах з різними обсягами виробленої продукціїКлючові слова: сушарка, сушка насіння сої, тканинний аерожолобами, тканинні сита, післязбиральної обробки

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“…These values for the drying agent are often assumed to be constant, which is a rough assumption that should be avoided. Some authors in their work [1] quite rightly claim that these values of the drying agent are constant, since they are constantly maintained at the same level along the entire wood drying chamber, but this is far from the case. Another authors, in their work [2], have clearly demonstrated that the values of the drying agent have completely different values in other areas of the drying chamber.…”

Section: Introductionmentioning

confidence: 99%

The use of cellular automata in the simulation of wood drying processes in a wood drying chamber of periodic action

Sokolovskyy¹,

Sinkevych²

2022

CDS

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In this work, research the essence of the wood drying process in a periodic wood drying chamber. This paper provides a mathematical model of a wood drying chamber, which describes the general essence of physical drying processes using the equipment available in the wood drying chamber. This approach allows to take into account the physical parameters of the necessary equipment, such as heaters, fans, humidifying nozzles or other. This approach also allows to ignore some design characteristics that may differ depending on the type of wood drying chamber. Considering this, the main task in this work is to determine the temperature and humidity of the drying agent and lumber in the stack, as well as the temperature of the main components of the wood drying chamber. Taking into account such a large number of input parameters and describing a complex non-stationary process of heat transfer, there is a need to create complicated mathematical models. The presence of such mathematical models greatly complicates their application and requires significant computer resources for their calculation. In this way, the mathematical description is reduced to the description of non-linear partial differential equations. To simplify and speed up the calculations of this mathematical model, the use of cellular automata is suggested. To do this, the 3D model of the wood drying chamber is represented as a cell-automatic field, which consists of cells of the same size but different types. As a result, neighboring cells contain local relationships that describe their general behavior. This behavior depends on the type of tangent cells and is described by transition rules based on a mathematical model. Through the use of the developed cell-automatic model and transition rules, it is possible to obtain the values of the temperature and moisture content of the wood in the stack, the drying agent in the chamber, as well as the temperature of the main components of the chamber. The work also shows the corresponding graphs of changes in temperature and moisture content. To check the adequacy and reliability, the obtained results were compared with the results of other authors' experiments. As a result of the verification, the values of the average absolute error aren't high, which confirms the adequacy of the mathematical model and the prospects of using the developed cell-automatic model.

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Development of the method of exposure control of grain drying in hightemperature dryers

Cited by 6 publications

References 9 publications

Kinetics of quartz sand and its mixtures drying by microwave radiation

Kinetics of quartz sand and its mixtures drying by microwave radiation

Design and study of equipment for accepting and drying soya seeds with high moisture content

The use of cellular automata in the simulation of wood drying processes in a wood drying chamber of periodic action

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Development of the method of exposure control of grain drying in high­temperature dryers

Cited by 6 publications

References 9 publications

Kinetics of quartz sand and its mixtures drying by microwave radiation

Kinetics of quartz sand and its mixtures drying by microwave radiation

Design and study of equipment for accepting and drying soya seeds with high moisture content

The use of cellular automata in the simulation of wood drying processes in a wood drying chamber of periodic action

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Development of the method of exposure control of grain drying in hightemperature dryers