Reactors and Regenerator Burner Vessels

Fluid Coking and Cracking, Delayed Coking, Alkylation, Sulfur Plants, and Sour Water Strippers 

The flow pattern in a fluid coker is similar to that of a fluid catalytic cracker except that the circulating solids are coke. Part of the coke is burned in the burner vessel, and hot coke is circulated to the reactor. 

The cyclones in both unit types are lined with erosion resistant refractory. The cydones in the reactors are usually made of carbon steel the cyclones in the regenerators are made of either 2%Cr-l Mo or type 304 (UNS S30400) or 321 (UNS S32100) stainless steel (SS). Oxidation resistance and creep strength, rather than sulfur attack, govern the selection of the cyclone material. 

Since this failure, most designers have used only ellipsoidal or hemispherical heads that require a minimum temperature, typically 80° F (27° C), for hydrostatic tests of field-erected vessels. 

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