Submerged combustion vaporizer(SCV)is one of the commonly used vaporizers in LNG terminals.It has the advantages of high thermal efficiency,rapid response to load regulation,and is not affected by ambient temperature,etc.It is one of the key equipment for natural gas peak regulation in winter in LNG terminals.In order to solve the overheating phenomenon of the bottom plate of the SCV burner in the operation process of a domestic LNG terminals,the computational fluid dynamics(CFD)method was used as an auxiliary means to verify the theoretical optimization of the burner structure.The simulation model was established according to the geometric structure of the burner,and the numerical simulation under different load conditions was carried out.And the calculation is carried out by fluent flow field analysis software.The temperature distribution,flow path and velocity vector distribution of the burner bottom plate were analyzed after the premixed gas pipe was extended by 100 mm.The calculation results show that:through CFD analysis and verification,extending the premix pipe of the burner by 100 mm can move the high temperature distribution downward,effectively improve the temperature overheating problem at the bottom plate,achieve the purpose of safe and stable operation of the equipment,and provide a good experience for the fault maintenance of this type of burner.
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