| The rapidly developing silicone industry is increasingly demanding the large-scale and high-efficiency of organic silicon monomer synthesis core equipment silicone fluidized bed.In order to develop a more efficient and high-capacity silicone fluidized bed with a main body diameter of 3200mm(DN3200),the design trial production and operation experiments of the experimental prototype,operation data extraction and secondary modeling analysis,finite element simulation,further Research on optimization design and trial operation of new equipment.The main work and research results of this paper include the following aspects:(1)Participated in the design and trial production of the DN3200 silicone fluidized bed experimental prototype.Through the feedback data analysis of the prototype operation,it was confirmed that the DN3200 experimental prototype production capacity was significantly improved compared to the DN2600 silicone fluidized bed.It was found that when the experimental prototype was working,from bottom to top,the internal temperature showed a trend of first increasing and then decreasing and uneven temperature distribution in the middle,and the internal pressure was gradually decreasing and the decreasing rate was becoming slower and slower.The optimized design of the bed lays the foundation.(2)Completion of the recovery and disassembly data extraction of the DN3200 silicone fluidized bed experimental prototype and the relatively mature DN2600 silicone fluidized bed old bed after the service period;based on the erosion wear theory,using Origin data analysis software to complete The comparative analysis of the data extracted from the disassembly of the two equipments was obtained,and the wear and tube strength distribution of the two equipments from the bottom to the top showed a trend of "stronger → weaker → stronger".The distribution is extremely uneven.Provide a basis for the optimal design of DN3200 silicone fluidized bed.(3)Based on computational fluid dynamics,the numerical simulation analysis of the fluid distribution of different cylinders in the lower part of the silicone fluidized bed and the gas distribution plate cone angle angle was completed.Through the analysis of the pressure and velocity clouds of the secondary variable-diameter cylinder of different angles,it can be concluded that when the angle of the lower section is controlled at 16 °-19 ° and the angle of the upper section is 11 °-14 °,the The pressure change is relatively gentle,the pressure drop in the barrel is small,the particles can be fully fluidized in the barrel,and it is not easy to form materialaccumulation and channel flow on the wall of the barrel.Through the analysis of the gas-solid two-phase distribution cloud map of the gas distribution plates with different cone angles,it is concluded that the gas distribution plate performs better overall when the cone angle is 140 °.(4)Based on the experimental analysis results and finite element simulation analysis results of the silicone fluidized bed experimental device,the optimized design of the silicone fluidized bed grid,heat exchange tube bundle,variable diameter cylinder and gas distribution plate was completed The design,manufacture and trial operation of a prototype of a new silicone fluidized bed.Operational feedback data shows that the primary conversion rate of methyl chloride in the DN3200 silicone fluidized bed equipment medium is 50%,and the annual production capacity of silicone monomer is 150,000 tons.Based on the experimental research,operation data monitoring and extraction analysis,finite element simulation analysis,and structural optimization of new equipment,DN3200 silicone fluidized bed is manufactured,and its overall performance is significantly improved compared with the original equipment,among which the annual output capacity of single equipment reaches the international leading level. |
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