Research On Fundamental Theories And Key Technologies Of Horizontal Preloading Processing Equipment For Domestic Waste

With the constant improvement of urbanization development and people living environment requirement, the demand of domestic waste disposal quality is improved accordingly. The constant rising of domestic waste processing equipment level is the foundation to satisfy with the improvement requirement. It is also an urgent important engineering technology problem involving the national economy and people’s livelihood. Horizontal preloading processing equipment for domestic waste is a new environmental protection equipment which compresses domestic waste repeatly (preloading compression) with horizontal thrust, supplementing by blowdown, deodorant and other measures, so as to realize the domestic waste disposal target of harmless, reduction, recycling and avoiding secondary pollution. Horizontal preloading processing equipment for domestic waste is the fundamental equipment of underground lifting compression processing station and horizontal preloading transfer processing station, widely applied in middle disposal domain of urban and rural domestic waste, has many features like high efficiency of disposal, well compactability and environmental protection, large capacity of single loading and low cost of transportation.In this dissertation, combining engineering experiment and theoretical analysis, the fundamental theory problems of compressed domestic waste distribution load and compression technics are researched; based on engineering examples and aiming at universality principle, the key technologies of equipment design and control are developed; and the engineering application method of theory and technology is discussed. The main research contents are as follow:(1) In order to research on the distribution law of compressed domestic waste load in compression box, using the methods of combining theoretical analysis and engineering experiment, based on Eggshell theory, the compressed domestic waste curved surface model and distribution load model in compression box of horizontal preloading processing equipment are established. According to structural experiment and finite element simulation of compression box, the relationship between stress status of each compression box side and compressed domestic waste status is obtained. Thus the compressed domestic waste distribution load functions are established.(2) In order to study on horizontal preloading processing technics for domestic waste, analyze the effects on compression box mechanical performance and domestic waste compression characteristics by defferent compression force and compression method, According to the characteristics of horizontal preloading processing for domestic waste, the technics experimental system of horizontal preloading processing for domestic waste is designed. Based on compressed domestic waste distribution load model, the experimental measurement points are determined with simulation analysis and experiment. Based on compression pressure-stress of compression box, compression pressure-stress of rear plate, compression (preloading compression) method-density of compressed domestic waste and compression pressure-density of compressed domestic waste experiments, the horizontal preloading processing technics for domestic waste is presented. On the basis of the technics, the process flows of underground lifting compression processing station and horizontal preloading transfer processing station are designed respectively.(3) Taking the key devices of horizontal preloading processing equipment-lifting device compression device and hydraulic system as research objects, an the specific engineering cases as start point, the structural optimization and performance analysis technologies of horizontal preloading processing equipment for domestic waste are studied. Based on theoretical calculation, simulation and experiment, the optimal design technology of lifting device is researched. Applying finite element method, the mechanical analysis technology of compression device is studied. Based on structural topology optimization method, the lightweight design technology of compression box is researched. Using AEMSim, the simulation analysis technology of characteristics of hydraulic system is studied.(4) Integrated applying PLC (Programmable Logic Controller), touch screen, fieldbus and configuration control technologies, the control system structure of horizontal preloading processing equipment for domestic waste is designed, the compression control technology based on PLC is researched. Aiming at monitoring and control functions, using touch screen and configuration software, the monitoring and control technology of horizontal preloading processing equipment for domestic waste is studied. Base on hardware in loop method, the control system simulation test technology of horizontal preloading processing equipment for domestic waste is researched and the simulation test platform is designed. These results compose the design method of horizontal preloading processing equipment control system.Finally, with the development of LSY series underground lifting compression processing station and LSYY type horizontal preloading transfer processing station, the correctness and engineering application method of key theories and technologies of horizontal preloading processing equipment for domestic waste are verified. The main research results of this dissertation have passed achievement appraisal organized by government, widely applied in engineering domain and achieved good practical effect.