Valuation of vibration and electric technical parameters of draining process the high-damp and liquid heterogeneous systems of processing

Abstract

Increasing the driving force of the process of dehumidification pumpkin and other high-water agricultural produce,  was increased by centrifugation when rotating the rotor, creating an electro-osmotic effect when creating effective conditions for unilateral diffusion, the process of filtering the medium through the perforations of the rotor. To reduce technological resistance in the presented processes created a fluidized bed of products by providing a working capacity of oscillatory motion. To determine the rational parameters of the process of vibration centrifugal moisture removal with the use of electro-osmotic effect, an experimental vibration unit, a device for forming an electric field, measuring and control equipment in the form of a microcontroller system were developed. The complex of the developed equipment ensured the sequential carrying out of three-stage vibration filtration-convective drying of high-water pumpkin seeds by alternating the action of the flow of coolant, electromagnetic field, low-frequency oscillations in their certain combinations and change of technological parameters. The intensity of vibrational filtration-osmotic dewatering reaches a maximum at values of vibration acceleration of about 35- 40 m / s². Dependences of the diffusion rate upon dehydration were obtained from such factors as asymmetry of AC half-periods, current density, AC frequency, asymmetry of AC half-periods with triangular, sinusoidal and rectangular currents, vibration acceleration. The processing time to achieve the required humidity when applying vibration, filtration and electro-osmotic effect was twice less than for filtration drying in a fixed layer. The proposed technology improves the technical and economic parameters of the dehumidification processes, in particular, the specific energy consumption for removing 1 kg of moisture is reduced by 2.7 times compared to traditional convective drying.Combaining with technoiogical operathion of phyzycal and mechanical factors gave the opportunity for intensificathion of the process of dehumidification the liquid heterogeneous  systems in processing and the first curing the agricultural produce.