Design Of Hammer Mill Test Bench And Optimization Of Structural Parameters

Oil-based drilling fluids are widely used in oil and shale gas mining processes.Oilbased drilling fluids are used to drill a large amount of oil-containing cuttings.Commonly used cuttings degreasing methods include reinjection method,landfill method,pressure filtration method and heat treatment method.TCC(Thermal Cutting Cleaning)technology is a thermal analysis method for oil-containing cuttings,which can reduce the oil content of drill cuttings to less than 1%,and can directly discharge solid waste.Hammer mill is the core equipment of TCC thermal analysis oil-containing cuttings treatment method.Experiments and EDEM simulation studies on the internal heat transfer and energy consumption of hammer mill are of great significance to the structural design and parameter optimization of hammer mill.In this paper,the hammer mill test bench was designed and built.Through the experiment,the temperature rise and torque variation of the hammer mill under different rotation speeds and different filling rates were obtained.Then based on the Hertz elastic theory,the contact model of the oil particles in the hammer mill was established.The contact model was simulated by EDEM software.The particle motion and heat transfer law of the hammer mill were studied on the particle scale.After comparison with experiments,the simulation model at high speed and high filling rate can simulate the temperature and torque changes in the prototype experiment.Finally,the influence of blade number,phase angle and blade shape on the performance of hammer mill is analyzed by EDEM simulation.By combining the structural parameters of the hammer mill,a better structural combination is obtained.Compared with the pre-optimization,the time taken by the hammer mill to rise to the target temperature under the six-blade,20° phase angle and the structural parameters of the new blade is reduced by 27.5%,which has better comprehensive performance.