Research On Process For Synthesis Of Methylchlorosilane In Fluidized Bed Reactor

According to the synthesis process in methylchlorosilane-monomer-synthesis fluidized-bed reactor and the requirements of actual production,the controlling parameters and the operation methods were optimized.Based on product components in the fluidized-bed reactor,multi period data were acquired.Some consumption coefficients were calculated.In the process of synthesis of methylchlorosilane monomer,the consumption coefficient of methyl chloride is 0.864,and the consumption of methyl chlorosilane monomer mixture,and high-boiling residues and slurry is0.216,0.330,0.255 respectively.According to the characteristics of synthesis of methyl chlorosilane monomer,the formula model of gas velocity in fluidized-bed reactor was derived,which was based on the critical fluidized gas velocity model and the solid particle settling separation model.Checking with industrial data,the calculated value from the derived formula model was in agreement with the actual values.When the operating gas velocity was stable within a reasonable range,with increasing of monomer yield,the fine powder particles released from the fluidized bed reactor decreased.With material balance algorithm,the calculation formula of material position in fluidized-bed reactor was established.After the period of operation,checking with multi period production data,the deviation between the material position of theoretical calculation and the actual material position was about 7%.According to the mathematical calculation method,the total amount of material in the fluidized-bed reactor was stabilized by this model effectively,and then the reaction of monomer’s synthesis was contolled effectively.According to the heat transfer model,which applies to strong heat transfer process in the fluidized-bed reactor and has internal heat source,convection heat transfer coefficient of concentrated phase was 120.7 W/(m~2·℃),calculated with actual data of industrial production.There was a large deviation between the calculated convection heat transfer coefficient and the design value.It was derived from the foulingon the tube surface which can affect the heat transfer.Gas film thickness was used for the characterization of surface fouling thermal resistance of finger shaped tube.Heat transfer on the surface of finger shaped tube can be improved by regular cleaning of the wall surface of the finger shaped tube.