| 摘要 |
In a radial flow catalytic reactor, a centerpipe is gravity supported in a central socket member and restrained as to vertical upward movement within a predetermined maximum distance to prevent unseating of the centerpipe due to thermal cycling of the catalyst and/or the reactor internal members. Such vertical movement of the centerpipe is restrained by means, such as one or more rods, interposed between the top of the centerpipe and an upper portion of the vessel. Similarly, restraining rods may be used to confine vertical movement of the screen segments enclosing the catalyst bed. Additionally, the centerpipe may include a perforated pipe enclosed within a cylindrical screen member forming a major portion of the centerpipe. The pipe is independently seated in the central socket member so it may expand and contract independently of catalyst action on the centerpipe screen section.
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