Experimental Study On Solid-liquid Separation Characteristics Of Hammer Mill

Oil-based drilling fluids are used in a wide range of oil and shale gas extraction processes,but at the same time the processes produce a large amount of oil-containing cuttings.Hammer mill is one of the core equipment useded to process oil-containing drill cuttings.It can realize solid-liquid separation of oil-containing cuttings in the range of 240 ～ 260 °C by thermal analysis principle.This method can reduce the crude oil mass fraction of oil-containing cuttings to 1.0% or less.In the following,in situ emissions can be achieved.To this end,this paper conducts experiments on the thermal analysis of oil-containing cuttings,and combines the numerical simulation method to study the solid-liquid separation law in the hammer mill.Firstly,the hammer grinding thermal analysis experimental device and the oil-water mixed steam detecting device are constructed to carry out solid-liquid separation experiments on oil-filled cuttings with different liquid contents,different material filling rates and different stirring speeds.The cylinder wall temperature and oil-water mixed steam are tested,and the variation law of the cylinder wall temperature rise and the solid-liquid separation rate are studied.Secondly,through the FLUENT numerical simulation,the temperature rise curve and the simulation processing time of the cylinder wall temperature are obtained.After comparison with the experimental data,the error is in the range of 5.0% ～ 9.1%.Combined with experimental data and numerical simulation results,the effects of different liquid contents,different material filling rates and different stirring speeds on the solid-liquid separation of oil-containing particles are summarized.