Rappable steam generator tube bank

A steam generator tube bank comprising:

• a steam drum;
• a plurality of rows of tubes in fluid flow communication with said steam drum and extending downwardly from said steam drum;
• a plurality of rows of headers disposed below said steam drum, to place said headers into fluid flow communication with said steam drum, said headers being sized to permit deposits accumulating on said tubes to be removed from said tubes by inducing vibration of said headers and said tubes;
• and
• a plurality of mechanical rappers disposed in a spaced relationship to said headers for striking said headers to induce vibration of said headers and said tubes for removing deposits from said tubes.

A steam generator tube bank comprising:

• a steam drum;
• a plurality of tubes in fluid flow communication with said steam drum and extending downwardly from said steam drum;
• and
• a plurality of headers disposed below said steam drum, said tubes extending to said headers to place said headers into fluid flow communication with said steam drum, said headers being sized to permit deposits accumulating on said tubes to be removed from said tubes by inducing vibration of said headers and said tubes;
• a least one downcomer a portion of which is disposed below said headers;
• a plurality of feeders connecting each of said headers to said at least one downcomer to place said headers in fluid flow communication with said at least one downcomer;
• a conduit extending below said steam drum for passing particulate-containing gases between components of a reactor;
• and
• a hopper connected to said conduit and extending below at least a portion of said conduit;
• at least a portion of said tubes extending through said conduit above said hopper and being in heat transfer communication with said particulate-containing gases passing through said conduit.