Red beetroot is the main raw material which has a high content of betanine with antioxidant properties. An important emphasis in the processing of antioxidant raw materials by drying is to reduce energy consumption for the dehydration process, the maximum preservation of biologically active substances, and to reduce the cost of the final product. Drying is a complex and energy-intensive process.
Heat-mass exchange processes during regenerated activated carbon drying was studied to determine the minimum height of heat-mass exchange zone and termination time of hot heating agent supply based on criterion equations and heat balance calculations. The heating agent temperature changes with time and the adsorbent bed height, as well as the time of moisture content change and drying rate were studied experimentally. Minimum height of a wet material layer ensuring rational use of the heating agent was determined.
The article develops a mathematical model of non-isothermal moisture transfer and viscoelastic deformation of wood during drying, which takes into account the anisotropy and variability of heat-mechanic characteristics. By finite element method was formulated by the implementation of mathematical models for viscoelasticity with regard to the accumulation of irreversible deformation. By object-oriented analysis is designed and implemented software implementation model in the form of documented classes.
In this paper there are considered the basic methods of mathematical modeling that are used to describe the processes of convective, convective-thermal and active hydrodynamic drying of dispersed materials, taking into account the structure of individual object of drying. They are described from perspective of continuum mechanics, the theory of mixtures, statistical approaches, which allows taking into account the volume fraction of each phase, the layering of the structure of the object and their changes in the process of phase transitions and chemical transformations.
This article is devoted to solving problems of disposal and use of phosphogypsum. Chosen as the most optimal and economically feasible method of drying phosphogypsum, namely filtration drying method. Experimental study on drying kinetics of phosphogypsum.
Вирішенно проблеми утилізації та використання фосфогіпсу. Обрано найоптимальніший та економічно обґрунтований метод сушіння фосфогіпсу, а сааме: фільтраційний метод сушіння. Проведені експериментальні дослідження з кінетики сушіння фосфогіпсу.
Досліджено зміни температурних режимів процесу сушіння у виробництві цукатів
з груш. Проведені експериментальні дослідження з теплообміну та кінетики сушіння
цукатів з груш за різної температури. Експериментально підтверджено доцільність
проведення процесу сушіння за температур цукатів, що дорівнюють температурі
гарячого теплового агенту. Згідно з тепловим балансом розраховано кількість енергії,
накопиченої шаром груші, та необхідної енергії для випарювання вологи. Встановлено,
Reduction in the cost of energy in the food industry is an important challenge today due to increased prices. Drying process of plant material refers to the complex energy-intensive processes. Solution of this problem is the development of drying methods that would reduce energy consumption by the process. In the drying of plant material, another major factor is the quality indicators of the finished product, which depend mainly on the drying technology.