Design Of Solid Particulate Matter Separator For Coal Gasification Product

Entering the 21 st century,with the excessive consumption of oil resources and the rapid development of automobile industry,human dependence on oil is becoming increasingly serious.Besides,the era of oil shortages has begun to take shape and the seeking for oil substitutes is imminent.Meanwhile,coal oil technology is one of the best ways to solve the oil crisis and coal gasification is the key technology of coal oil technology.Based on the study of solid particles in coal gasification products,this paper designs a separator that separates the solid particles from the high temperature mixed gas,including the performance of solid particles in mixed gases,separation unit material selection,structure separation and design.Combined with the separation machine control hardware design,the appropriate host computer is selected to achieve the separation process of automatic control.Besides,it made a pyrolysis experiments before the separation of the impact of the separation process of coal tar and the main work findings are as follows:1.The involved gas-solid separation technology,the basic information of the separation equipment,and the current high-performance separation materials and the development trend of high-temperature gas dust remo val technology were basically introduced.Based on the understanding,the current production process was improved,and new design scheme suitable for the subject was put forward.Besides,factors affecting the separation process were presented,mainly including particle property,basic environment of the separated material,separation method and separation material.The influence of the important factors was compared analyzed in details.The reference indexes required in the design of the project were determined by the combination of the parameters in the actual process of separation.2.The separator that suited for using in the coal oil process in Northern Shaanxi region was designed,including the material selection of separation unit,structure design of separation unit,process design of separation and the structural design of the separator as a whole.A detailed description was conducted on feeding/discharge material of separator,slag removal method and valve system.Moreover,the design ideas and implementation effect in the process were analyzed.Separation unit adopted the new type structure(sintering net+ triangle silk)made of iron aluminum alloy.Double cylinder parallel alternating work mode was designed for the separator.When separation unit needed reverse pulse slag removal,double cylinder structure could realize alternate slag removal,and ensure the production process run continuously.3.The hardware the separator control parts were designed and the suitable upper computer was chosen.Separator system adopted binocular continuous work alternately.There was a total of 6 electric solenoid valves,2 pulse type magnetic valves,1 high-pressure feeding pump,2 differential pressure transmitters.The feeding port and discharging port were continuously monitored respectively.The system adopted STC89C58 single chip microcomputer as field controller;program controlled two filter cartridges to conduct the alternating continuous process of filtering-unloading slag – discharging slag-cartridge exchange.The valve driver circuit,feeding pump drive circuit,and the detection of process differential pressure and flow were designed.Upper computer adopted Advancetech Pentium 4 PC industrial control machine,which was used to receive traffic signals sent out by microcontroller and completes the display of the instantaneous state of the machine work,and cumulative flow as well as the calculation of efficiency.4.The cracking test was conducted on coal tar that affected the separation process of coal gasification products,and the remaining coal tar products were collected with cold trap method.According to the contrast test results,tar content gradually reduced with the increase of temperature and adding limestone could help tar crack.The particle size of the particles produced by coal gasification was analyzed.Besides,the solid particle content before and after gas-solid separation was tested and analyzed.Besides,the solid particle content before and after gas-solid separation was measured thro ugh weight method and β ray method respectively.Furthermore,based on the comparison of the testing results before and after separation,it was found that the collection coefficient of the separator could reach 90%,and it reached the gas-solid separation requirements.