Development of an apparatus with induced heat-and-mass transfer for drying and hydrothermal processing of moist materials
DOI:
https://doi.org/10.15587/1729-4061.2020.205062Keywords:
induced heat-and-mass transfer effect, drying, hydrothermal treatment, temperature kinetics, phase portraitAbstract
The need to solve the problems of efficient use of energy resources in processes of heat-and-mass transfer which are widely used in the food and processing industries and are very power-intensive was substantiated. The prospects of application of the induced processes such as the effect of induced heat-and-mass transfer characterized by high energy efficiency and environmental friendliness were noted.
Drying and hydrothermal treatment of moist raw materials with gas-tight inserts in horizontal and vertical orientations were modeled. It was established that the nature of this effect in the presence of gas-tight inserts in the solid phase inside the thermostat does not differ from the nature of the effect of induced heat-and-mass transfer in absence of such inserts.
It was proved that during the induced heat-and-mass transfer, features of the flow of any volume of internal thermostat medium affect the nature of this flow for other allocated volumes. It was noted that the feature of «artificiality» and controllability of this effect makes it possible to perform certain manufacturing operations in processing different raw materials in one device without their mixing.
A technical solution of an apparatus using the effect of induced heat-and-mass transfer for drying and hydrothermal treatment of moist raw materials was proposed based on the obtained experimental results and established theoretical conclusions. The productivity of the developed apparatus in hydrothermal processing of cereals makes 18 kg/h and the energy consumption is 8.1·106 J/kg of dried product. The final product is a quick-recoverable porridge that does not require cooking. It was noted that the economic attractiveness of the developed device with the effect of induced heat-and-mass transfer for drying and hydrothermal treatment consists in the ability to reduce energy consumption for these manufacturing operations by 30 %References
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