The Development Of The Digital Prototyping And Simulation Optimization Design Of Enclosed High-speed Fermentation Equipment

Enclosed high-speed fermentation equipment is a kind of agitated fermenter used for treating livestock and poultry manure.It's sealing ability is good,and it has a high degree of automatization.It can run continuously all year round and it cover a small area.Enclosed high-speed fermentation equipment can directly produce high-quality organic fertilizer in the input of the livestock and poultry manure,fermentation bacteria and accessories.The improvement of people's living standard and the increase of livestock and poultry meat demand result in the increase of livestock and poultry manure pollution,the enclosed high-speed fermentation equipment can solve this environment pollution.The trends of agitation fermentation equipment are large-scale and automation.The design of agitated fermenter's structure and selection of process parameters are became more and more important.The calculation results of the design and amplification of the agitated fermentation equipment are not accurate by using the empirical formula.The unreasonable selection of the process parameters of agitation fermentation equipment will result in unnecessary energy consumption and cannot make full use of the equipment's performance.Aiming at solving the above problems,the development of digital prototyping,functional simulation and analysis of key components of ?4.49×5.25m3 enclosed high-speed fermentation equipment were carried out in this paper.The process parameters and structure type of agitated fermenter were also analyzed and optimized.Thesis mainly includes the following several aspects:(1)The detailed three-dimensional model of the components of enclosed high-speed fermentation equipment was built.The digital prototype assembly and interference inspection of the whole machine model of agitation fermentation equipment were carried out.Three-dimensional assembly animation of structural presentation of agitated fermenter was established.(2)The working principle of agitation fermentation equipment was analyzed.Three-dimensional models of the equipment were imported into the kinematics and dynamics software ADAMS for analysis.Three-dimensional presentation animations of principle and function of agitated fermenter were created.The rationality of the design of motion components was verified.(3)Computer Aided Engineering analysis was carried out on key components of enclosed fermentation equipment.The static analysis and buckling stability analysis of hydraulic driving rods of agitated fermenter are carried out by using finite element analysis under the condition of extreme load.(4)The properties of feedstock and process parameters of agitation fermentation equipment were verified and optimized.The viscosity of feedstock,rotation speed and filling height of the equipment were analyzed and validated by using finite element analysis.Fluid-structure coupled finite element analysis for the stirring device of agitated fermenter was conducted by using ANSYS software and ANSYS Fluent software.Torque,deformation and stress of stirring device were researched to obtain reasonable viscosity range of feedstock and reasonable process parameters.Prestressed modal of stirring device was analyzed.(5)Structure type of enclosed agitated fermentation equipment was optimized.The agitation fermentation equipment was changed from vertical type to horizontal type.The feasibility,rationality and superiority of the horizontal agitated fermentation equipment were analyzed and validated by comparing the torque and stress of stirring device under different viscosity of feedstock of two structure types.