Aiming at the problem of instability in the 8-shaped shell with nozzle structure of biaxial self-cleaning reactor under excessive external pressure,the finite element analysis method was used to investigate the external pressure stability of 8-shaped shell with nozzle structure of the biaxial self-cleaning reactor.When the distance between the nozzle centerline and the vertical centerline of the 8-shaped shell X was 0.0a,0.4a and 0.5a,Do/δe was 30,40,50,60 and 70,L/Do was 2,3,4,5and 6,d/D was 0.10,0.25,0.40,0.55 and 0.70,δet/δewas 0.2,0.6,1.0,1.4 and 1.8,the relationship between various structural parameters and the critical destabilizing pressure weakening coefficient K was investigated.The results show that the external pressure bearing capacity of the 8-shaped shell of nozzle structure is significantly weakened for the smaller δet/δe,the smaller L/Do,the larger d/D,and the larger Do/δe.
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