双层格栅对工业MTO反应器流动特性影响的MP-PIC模拟

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中图分类号：TQ021.4 文献标志码：A

Abstract：Thereactorofanindustrialmethanol toolefins（MTO）unitisalarge turbulentfluidizedbedreactorwithadense phase section diameter of 10m ，which has a plate gas distributor at the bottom and double-layer mesh grids in the dense bed. Inthisstudy，MP-PIC（multi-phaseparticle-in-cell）methodwasusedtosimulatethehydrodyamicsofthis inustrialreactorproportionally.Allthe major internalssuch as particledistributors，mesh grids，and cyclone separator groups were consideredinthesimulation，and mainoperating parameters were taken from industrial data to studytheroleof double-layer meshgridsinthereactor.Theresultsshowthattheaveragebeddensityobtainedbysimulation is ingoodagreement withthe actualindustrialdata.Theinstalationofdouble-layermeshgrids increasestheheightofthedensephasebedandreduces the average density of the dense phase bed by 112kg/m3 ，indicating the improvement of the fluidization quality and gas-solid contact effciencyofthedensephasebed.Meshgridscanefectivelylimitthegenerationoflargebubbles inthebed，sothat thedense phase particles above thegridare moreevenlydistributedandthegas-solidmixing is more sufficient.Meanwhile， the axial back-mixing of particles in the dense phase zone of the reactor can be greatly inhibited.

Keywords： MTO；reactor; fluidized-bed;grids；multi-phase particle-in-cell method;simulation烃的技术，为中国储备相对丰富的煤炭、大然气资源提供了向化工领域发展的机会[1]。（剩余13053字）