Development of an Energy- Efficient Rotary Inertia Device for Briquetting Household Solid Waste (HSW)

Abstract

Today, increasing volumes of household solid waste (HSW) pose a serious problem throughout the world. The solution to this problem is involvement of secondary raw materials and waste in production. The disposal of HSW includes laborious stages of its collection and transportation. Aggregates of the garbage truck work inefficiently, only pressing HSW into a shapeless mass, not subject to sorting and processing. The suggested re-equipment of a special vehicle with aggregates with the combined functions of «loading–forwarding–grinding–pressing– briquetting» will significantly reduce the energy consumption of the transportation process by providing simultaneous processing and briquetting of garbage at the time of its transportation. A scientific and technical problem arises in development of a technique for technical re-equipment of high-performance special equipment with given nominal energy and power characteristics of the machines. It was proposed to solve this problem by combining recuperative systems with reuse of the energy of gravity of the own mass of garbage. Thus, the objective of the work is to develop a rotor-inertial device with reduced energy intensity. Methods of analytical and statistical research of the model range of special equipment with an analysis of its technical characteristics have been applied. To solve the problem of developing a kinematic diagram of a briquetting device, a calculation was performed based on the method of modeling the structure of composite aggregates. Modeling was performed in SolidWorks program in Simulation application package. The developed kinematic diagrams of units and aggregates for briquetting and pressing garbage operate at rated power characteristics of hydraulic equipment achieved due to distribution of drive power among the most energy- loaded operations. The article presents the rationale for effectiveness of the developed rotary- inertia device for briquetting HSW. The originality of the design lies in the structural arrangement of the briquetting unit and the grinding mechanism. The use of the principles of inertial moments and gravity of own mass of garbage allowed us to significantly (by 25 %) reduce the energy consumption of the pressing process and formation of the finished briquette. The use of mechanical energy of the conveyor belt tensioners and of the mass of the roll increased with briquetting under its own weight, allowed to reduce the work spent to form compacted HSW from 48000 kJ to 11970 kJ, to reduce the volume of the pressed roll, to increase the utilization rate of load carrying capacity, to reduce the energy intensity of the process.