Instant food products are extremely popular, and food industry knows numerous ways and methods of their production. To remain competitive, an instant drink production process should be efficient and flawless. The research objective was to improve the physical profile of granular instant products. The study featured a vibrating drum unit controlled segregated flows. The granulometric composition, porosity, and strength of the obtained granules were tested in a vertical vibration cl assifier. The new design of the drum with an installed classifier was able to grind larger granules. The research revealed the effect of frequency and amplitude on the porosity and strength of the granules. The rotation rate of the belt mixer had a greater effect on the agglomeration process than the amplitude and frequency of the vibrations in the generator. The porosity and strength of the granules depended on the parameters of the classifier. Therefore, the new drum design made it possible to control the operating parameters depending on the required properties of the finished product. The rational parameters were obtained as follows: frequency and amplitude of the vibration generator – 1 mm and 40 Hz, respectively; rotation speed – 7 rpm; drum tilt angle – 3°; amplitude and frequency of the classifier – 2 mm and 100 Hz, respectively. The study revealed the optimal technological parameters for a new instant drink. The new vibration classifier increased the distribution density of the granular composition.
В условиях высокой занятости населения возникает необходимость развития более сбалансированного питания. Одним из таких продуктов могут выступать инстантированные напитки на основе плодово-ягодного сырья. Подавляющее большинство таких продуктов на рынке представлено в виде многокомпонентного гранулятора с заданными показателями качества. При производстве таких продуктов используются грануляторы различного типа, однако для малых производств, которые могут быстро переориентироваться на выпуск новой продукции, более перспективными являются грануляторы периодического действия, например, роторные смесители-грануляторы. Однако при анализе получаемого дисперсного состава было выявлено, что продукт имеет нестабильный гранулометрический состав. В работе исследовались дисперсный состав и прочность гранулированного продукта, полученного в роторном смесителе-грануляторе. В результате литературно-патентного обзора была предложена модернизация известного гранулятора и определен дисперсный состав получаемых гранул. В результате проведенных исследований было выявлено, что гранулометрический состав готовой продукции стал более стабилен по сравнению с прототипом оборудования. При анализе прочности получаемых гранул не было выявлено существенного изменения, однако была выявлена зависимость прочности на раздавливание от частоты вращения рабочих органов, так при увеличении частоты вращения лопасти выше 2000 мин-1 наблюдался рост прочности гранул. Также при увеличении частоты вращения происходит рост мелкодисперсной фракции в готовой продукции. Обработка полученных результатов исследований позволила получить экспериментально статистическую модель зависимости среднемедианного размера получаемых гранул от режимных параметров и свойств связующего раствора. In conditions of high employment of the population, it becomes necessary to develop more balanced nutrition. One of the types of such foods can be instantized drinks based on fruit and berry raw materials. An overwhelming majority of these foods on the market are presented in the form of a multicomponent granules with specified quality indicators. When manufacturing such foods granulators of different types are used, however, for minor productions that can be quickly reorientated to the release of new foodstuffs, periodical activity granulators are more promising, for example, rotary mixers-granulators. However, when analyzing the resulting dispersed composition, it was revealed that the foodstuff has an unstable particle size distribution. The work investigated the dispersed composition and strength of the granular staff obtained in a rotary mixer-granulator. As a result of the literature and patent review, the modernization of the well-known granulator was proposed and the dispersed composition of the resulting granules was determined. As a result of the research carried out, it was revealed that the granulometric composition of the finished staff became stabler in comparison with the prototype of the equipment. When analyzing the strength of the granules obtained, no significant change was revealed, however, the dependence of the crushing strength of the working bodies’ rotational speed was revealed, so, with an increase in the blade’s rotational speed over 2000 RPM, an increase in the strength of the granules was observed. Also, with an increase in the rotational speed, an increase in the fine fraction in the product finished occurs. The processing of the research results obtained made it possible to obtain an experimental statistical model of the dependence of the average median size of the granules obtained on the operating parameters and the properties of the binder solution.
Introduction. Products containing natural extracts are in great demand. However, poor production technologies make them too expensive to satisfy consumer demand. As a result, a variety of intensification methods have been developed to increase the economic efficiency of extraction, e.g. low-frequency mechanical vibrations. However, frozen raw materials have to be processed at low temperatures, which makes the method less efficient. The research objective was to intensify the extraction process from frozen berries in a vibration tray device by increasing the temperature of the system of interacting phases. Study objects and methods. The research involved frozen cranberries and blueberries. They grow everywhere in Western Siberia and are rich vitamins and minerals. The berries were subjected to slow freezing at –18°C, which destroyed the cell structure and increased the processing efficiency. The study was carried out in a lab device with a vibrating tray. All parameters were measured by standard methods. Results and discussion. The extraction device was equipped with a jacket into which a coolant was fed, i.e. water with a temperature of 55°C. A preliminary series of experiments revealed two negative aspects associated with the supply of coolant into the jacket. First, the surface layer started to thaw, which reduced the efficiency of grinding. Second, the processing time increased. A new method was developed to solve these problems: the coolant was supplied at the end of the grinding. The time of the coolant supply depended on the type of raw materials. The processes that occurred within the device depended on two factors: the frequency of vibrations of the tray and the diameter of the holes in the tray. These factors could be adjusted to intensify the process, but they increased the power costs and energy consumption. A series of experiments determined the optimal values of these parameters. A mathematical analysis revealed regression equations, i.e. how the destruction time and power costs affected the main parameters. The established optimal process parameters made it possible to determine the minimal time of the destruction process: for cranberries – 2.5 min, for blueberries – 1.5 min. The minimal power consumption was 17.8 watts for cranberries and 11.7 watts for blueberries. Conclusion. The research increased the economic efficiency of the technological process of natural extraction, which can reduce the cost of the finished product and increase its availability. The values of the process parameters can be used to design new similar devices and serve as practical recommendations for berry extraction in vibration tray devices.
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