We introduced the preparation of hybrid composites using technical cellulose as a matrix material from rice husks with a natural SiO 2 content from 0% to 19.4%. In this work, the physicochemical characteristics of the resulting hybrid composites have been investigated. The presence of SiAOAC chemical bonds in the resulting hybrid composites was determined by infrared spectroscopy. Microscopic analysis showed the complete removal of the mineral component and lignin from the cell wall of the rice husk fibers. This allows obtaining of an expanded surface of the fibers (101.7 m 2 /g) with uniform distribution of the TiO 2 aggregates. It could be shown that with content increasing of natural silicon dioxide in the hybrid composite the decomposition rate of H 2 O 2 also increases.

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Дроссельные шайбы, применяемые в сушильных цилиндрах (СЦ) для выпуска конденсата, имеют нерегулируемый условный проход, что приводит при интенсификации теплового и гидравлического режимов работы к накоплению конденсата. Повышенное содержание конденсата в СЦ увеличивает термическое сопротивление тепловому потоку от конденсирующегося пара к внутренним стенкам СЦ. Разработка методов обнаружения повышенного содержания конденсата в отдельных цилиндрах актуальна для снижения расхода пара на сушку бумаги. Выполнены исследования трендов температуры СЦ (скорости изменения температуры по времени, °С/мин) за период охлаждения после отключения подачи пара. Выбраны диагностические точки контроля и обоснован режим измерения температур в этих точках СЦ. Произведено исключение грубых ошибок экспериментов. Разработана методика и алгоритм расчета допустимых уровней трендов температур. Выполнены расчеты допустимых характеристик трендов температур за время интервалов охлаждения СЦ. По трендам температур определены СЦ с повышенным содержанием конденсата. Разработанный авторами метод и алгоритм расчета допустимых трендов температур охлаждения СЦ при останове машины, основанный на различиях в скорости охлаждения СЦ с конденсатом и без конденсата, теоретически обоснован и экспериментально апробирован в производственных условиях. Обнаружение СЦ с повышенным содержанием конденсата по данному методу можно производить параллельно с другими работами по технологическому и техническому обслуживанию сушильных частей бумагоделательных машин. Throttle washers used in drying cylinders (DC) for condensate release have an unregulated conditional passage, which leads to the accumulation of condensate during the intensification of thermal and hydraulic modes. The condensate accumulates in DS due to the tolerances of the scale uneven. The increased condensate content in the DC increases the thermal resistance to the heat flow from the condensing steam to the internal walls of the DC. Studies of temperature gradients during the cooling period after the steam supply to the drying cylinders has been performed. The method and algorithm of calculation of permissible levels of temperature gradients are developed. Drying cylinders with increased condensate level were determined. The development of methods for detecting increased condensate content in individual cylinders is relevant for reducing the steam consumption for paper drying. Studies of temperature gradients of the DC during the cooling period after the steam supply was switched off in the drying part of the boom-making machine were performed. Diagnostic control points are selected and the temperature measurement mode in the DC these points is justified. The exception of gross errors of experiments on the t-criterion Student's was made. A method and algorithm for calculating the permissible levels of temperature gradients and the minimum and maximum permissible temperature deviations of the surveyed SCS has been developed. A graph is constructed for detecting and excluding rough measurement errors from the sample. Calculations of permissible characteristics of temperature gradients during cylinder cooling intervals are performed. By temperature gradients during cooling intervals, DC with an increased condensate content are determined. The method and algorithm developed by the authors for calculating the permissible levels of cooling temperature gradients of the DC, when the machine is stopped, based on differences in the cooling rate of the DC with condensate and without condensate, is theoretically justified and experimentally tested in production conditions. Detection of DC with high condensate content using this method can be performed in parallel with other works on technological and technical maintenance of drying parts of paper machines.