| 摘要 |
1300076 Fluidised catalyst regeneration PULLMAN Inc 17 Dec 1969 [26 Dec 1968] 61595/69 Heading B1F Spent hydrocarbon conversion catalyst is decarbonised by passing into a vessel 1 (via line 18), this vessel containing two separated dense fluidised combustion beds 4, 6 having a common dilute phase and separated by baffle 3. The two beds communicate by means of overflow over the baffle and through openings 2 in the baffle. A major portion of the carbonaceous deposits on the spent catalyst are removed in the first bed 4 by combustion with an oxygen-containing gas having an oxygen content at least equivalent to air, these streams being introduced through line 29 and distributor 22. The decarbonization is completed in the second bed 6 using a similar oxygen containing gas introduced through line 21 and distributors 27, 28. Solids leave via line 24. Cyclones 9 are provided in communication with the flue gas outlet plenum 16. The temperature of the first bed is at least 1100‹F and at least 100‹F above the inlet temperature of the solids. The second bed is at a temperature of 1125‹F to 1350‹F and is at least 25‹F above the temperature of the first bed. The regenerator may be incorporated into a unitary continuous reaction-regeneration system (Fig. 3, not shown) and a further combustion bed may be trnowided between the first and second beds (Fig. 5 not shown). |
