Theoretical Studies of the Vibration Process of the Dryer for Waste of Food

Abstract

An urgent problem is drying and processing of the wet dispersed waste, obtained in the production of food products, which can then be efficiently used as a fertiliser, for feeding livestock or as biofuel. A new design of a vibrating fluidised bed dryer has been developed, which, with low energy consumption, provides a pre-set productivity and the required final moisture content. The process of vertical oscillations of the body of a vibration dryer, together with the food waste contained in it, is analysed analytically, the necessary equivalent scheme is built, on the basis of which differential equations of the vertical oscillations of the body are compiled, their analytical solutions are obtained, and a numerical calculation is performed on a PC using the developed program. Rational parameters of the vibration dryer, providing vibroboiling of the mass of the food waste, have been determined: the body mass m = 250 ... 510 kg; the debalance mass md= 10… 15 kg; the number of revolutions of the debalance electric motor nd= 1950 ... 2650 rpm ∙ min∙1; maximum stiffness of the support springs Cp= 8∙105 N∙m–1; the diameter of the centre of mass of the debalances dd= 0.01 m. In addition, as a result of the thermophysical theoretical and experimental studies of the vibration drying process, the following optimal design and technological parameters of the vibration dryer were obtained: the heat transfer area St.p.n= 4.15 m2; the radius of the heating pipe rt= 0.1 m; the length of the heating pipe lt = 3 m; the number of heating pipes nt= 50; the heat transfer coefficient Kp= 2500; the final temperature of the dried waste to2= 100 ºС.

Valorization of Food Waste as Animal Feed: A Step towards Sustainable Food Waste Management and Circular Bioeconomy

“…Figure 3 depicts the device’s major components. According to Bulgakov et al [ 70 ] a vibrating dryer for FWs was simulated. Their theoretical studies have revealed that this form of drier is able to minimize humidity as a guarantee.…”

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“…This allows to resolve problems of waste utilization and environment protection [4,5,6]. Significant number of researches related with improvement of dehydration methods and an equipment for their realization in a direction of increase of productivity, diminishing of powerconsuming and final humidity of processed material [7,8,9].…”

Elaboration and Research of Vibroshakers With Electromagnetic Drive for Classification of Dry Materials

“…That still more widen technological possibilities of the elaborated vibroshaker. There is a lot of standard, reliable and inexpensive electromagnetic vibro-exciters of different capacity and with wide range of parameters of fluctuations [5], so their selection as driving elements of the vibroshaker is quite reasonable. All this allows us to make a conclusion about successful elimination of main disadvantages of known machines for classification in the construction of the proposed vibroshaker.…”

“…xs, xmcoordinates of movements of the masses ms, mm; Fenominal driving force, creating by pair of the vibro-exciters of the vibroshaker [5]; FspI(t), FspII(t)variable elasticity force of the springs 6 in course of the loading cycle at the I stage and at the II stage respectively [6];…”