초록 ▼

A trough-type scale trap for use with a refinery or chemical plant reactor having a catalyst bed subject to plugging by fine particles. Compared to prior art traps, the trough-type scale trap of the invention is characterized by a larger volumetric capacity and screen area and is substantially easie

A trough-type scale trap for use with a refinery or chemical plant reactor having a catalyst bed subject to plugging by fine particles. Compared to prior art traps, the trough-type scale trap of the invention is characterized by a larger volumetric capacity and screen area and is substantially easier to construct and to install or remove from closed reactor vessels than conventional traps. Its typical embodiment is as a series of parallel troughs having rectangular openings and disposed chordally across the reactor normal to the direction of flow. In one embodiment, the trough is a rectangular parallelepiped; in another embodiment, the substantially rectangular opening is reduced by tapering to a bottom significantly smaller than the inlet opening.

대표청구항 ▼

An array of scale traps disposed normal to the direction of flow of incoming feed entering catalyst beds in a reactor vessel for filtering particles contained in said feed and preventing them from entering said catalyst beds which are subject to plugging by said particles comprising: a. a plurality

An array of scale traps disposed normal to the direction of flow of incoming feed entering catalyst beds in a reactor vessel for filtering particles contained in said feed and preventing them from entering said catalyst beds which are subject to plugging by said particles comprising: a. a plurality of interlocked parallel scale traps, each of said traps disposed in a chordal direction across the cross-section of said reactor vessel and including a support frame which has a troughlike configuration in the direction of incoming feed flow, said frame including a flat elongated rectangular top having an opening normal to said incoming feed and a flat elongated rectangular bottom having an opening parallel to and downstream of said top opening, said frame having sides connecting said top to said bottom, said traps transversely spaced apart a sufficient distance along the longer side of said top so that plugging of said beds is minimized; b. screen wire mesh fastened only to said frame of each of said traps and covering only said sides and said bottom whereby fluid eNtering said top opening is filtered by said trap and passes out of said trap through said wire mesh; and c. removable means for directly interconnecting adjacent ones of said scale traps in said array so that each of said traps is removable from said array upon disconnection of said removable means therefrom.