Design And Experimental Study Of Drainage Cyclone Separation Sand Collector

Wind erosion is a natural soil transport process under the action of wind and the abrasion of fine particles and nutrients on the surface caused by wind.The occurrence of soil wind erosion is a very complex process,including climatic factors,geographical factors and soil properties.Sand collector is an important device used to study soil wind erosion.In order to obtain more accurate and reliable sand flow data,it is necessary to continuously improve and optimize the existing sand collector,which is conducive to the study of wind erosion and sand,and improve the status quo of wind erosion of grassland.With ANSYS software,micro wind tunnel,wind tunnel for simulation test platform,through the orthogonal experiment by using the computational fluid dynamics discrete particle model,combining with the response surface method,through a series of orthogonal experiment,the structure of the cyclone separator into the optimum design,inspection of the cyclone separator six structural parameters and the influence of parameters on the performance of the interaction between.According to the performance test requirements of sand collector,the simulation test of sand collector with different structure parameters is carried out.Sand collecting tests were carried out on 0.15 mm ～ 0.5mm soil samples with sand collecting apparatus at wind speeds of 7,9,11 and 13 m/s.For data collection and data processing in the later stage of the test,Labview software was used to conduct real-time monitoring of sand collection data collection.The main research contents of this thesis are as follows:(1)Add a drainage tube at the sand discharge port of the traditional cyclone separation sand collector,and analyze the force and movement of the sand after it enters the sand collector through the size of the wind speed;The movement law of aeolian sand is analyzed according to the movement of aeolian sand flow field.Study the movement mode of wind-blown sand in the sand collector,how to make the particles of different sizes fall into the sand collecting tray through the drainage tube after the movement,and how to improve the sand collecting rate with the small particles discharged through the central rising pipe.Through Fluent simulation,the parameter model with the least number of escaping particles is studied,which is the parameter model of the study.(2)The assembled sand collector selects one of the sand collecting units to test the gas-solid separation efficiency of its single sand collecting unit.A miniature wind tunnel is used to blow all the sand sample particles from the air inlet of the sand collecting unit into the sand collecting unit.After the test,the collected sand sample particles are weighed,and the gas-solid separation efficiency of a single sand collecting unit can be calculated by comparing the sand sample quality before the test.(3)When the sand movement inside the set Sha Yi along the drainage tube after falling into a set of sand tray,under the tray L bearing the weighing sensor,weighing sensor and NI data acquisition card,will be collected in different periods of sets of sand weight to pressure signal is stored in the NI data acquisition card,and then connected to the computer,the signal is converted into a voltage signal of quality,Then the voltage signal is converted into digital signal which is stored by computer,and the collected data is processed and saved by LABVIEW software.Sticking to the principle of satisfying isodynamics and high efficiency,the experiment tests the sand collection performance by improving cyclone separation sand collector with a drainage tube.The results imply that the sand collection efficiency of the drainage cyclone separation sand collector is slightly higher than that of the cyclone separation sand collector.The sand collection test was carried out under the conditions of a simulated wind tunnel,and the average sand collection efficiency is 91.44%,which means that it works fine in the wild field environment.