Simulation of the process of grinding and transporting organic waste in an activated carbon production unit

Abstract

Today, the processing of organic waste, such as wood chips, technological chips, sawdust, sunflower husks, car tires, walnut shells, seeds of various vegetables and fruits, is becoming more and more popular. The industry is developing promising devices for waste processing with subsequent production of useful products for economic activity. Along the way, the question arises of grinding and transporting these wastes to the place of their processing. In particular, for an installation for the production of activated carbon from bulk waste, it is necessary to design grinding and transportation zones. In the work, on the basis of the selected grinder, a pneumotransport unit for feeding crushed organic waste to an activated carbon production unit was modeled. Mathematical modeling of the waste transfer process has been carried out, which makes it possible to determine the rational parameters of the raw material preparation zones. An algorithm for calculating a vertical pneumatic transport system has been developed, which can be used to calculate technological processes associated with the need to supply and subsequent vertical transportation of raw materials. Dependences were obtained: the speed of soaring on the bulk density of particles, the results of which revealed a significant effect of the thickness of the particle on its speed of soaring in the pneumatic pipeline, as well as the dependence of the diameter of the pipeline on the volumetric flow rate and type of raw material, which demonstrated an increase in the diameter of the pipeline with a decrease in the bulk particle density. The results of these dependencies can be used in the creation or modernization of vertical pneumatic transport systems designed for small volumes of transported raw materials.