| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for use with fluid beds retaining heat exchange capacity while reducing the influence of heat exchange tubes on fluidization characteristics of the fluid bed. SOLUTION: The apparatus and method for heat exchange with fluid beds comprise heat exchange tubes located longitudinally with respect to the axis of a fluidization zone with a rectangular pitch, one side of which having a length at least one and a half times the length of the other side and/or with a triangular pitch, having two sides each at least one and a half times the length of the shortest side. The apparatus and method are particularly suitable for oxidation reaction using molecular oxygen-containing gas in the presence of the fluid bed of a fuidizable catalyst such as (a) the acetoxylation of olefins, (b) the oxidation of ethylene to acetic acid and/or the oxidation of ethane to ethylene and/or acetic acid, (c) the ammoxidation of propylene and/or propane to acrylonitrile, and (d) the oxidation of C4's to maleic anhydride. COPYRIGHT: (C)2008,JPO&INPIT
|
