Scallops inside the radial flow reactors are for flow collection or distribution. It is generally D-shape, extending parallel to the inner vessel wall,and its inner layer delimits the outer layer of the catalyst bed.
The mechanical design of the equipment considers the loads generated in operation.
Also, after defects being revealed in field tests and feedback being given during the transitional heating, cooling and regeneration stages, the design is correspondingly enhanced.
The verticality and straightness of the outer basket are measured by laser, and the roundness is controlled within a certain error range.
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