Fluid catalytic cracking units equipment

Selective Catalytic Reduction (SCR) has been commercially used since the mid 1980s on fired equipment with the hrst application on a boiler in 1976. The first SCR unit installed on a fluid catalytic cracking unit was at Saibu Oil Company in Yamaguchi, Japan in April 1986. Since then, nearly two dozen ECC units have installed SCR units to remove NO from the flue gas and more are slated to be built in the future. Vendors and catalyst suppliers of this technology include Haldor-Topsoe, Mitsubishi Power Systems, Hitachi, Technip, BASE, and Cormetech. 

Indicated in Fig. 2 is a representative fluid catalytic cracking unit, comprising ( )a reactor (2) a regenerator (3) the main fractionator (4) an air blower or compressor (3) a spent-catalyst stripper (6) catalyst recovery equipment, including cyclones internal in the reactor and regenerator and slurry settler, and possibly an electrostatic precipitator and (7) a gas-recovery unit. The catalyst used is essentially u specially prepared composite of silica and alumina. 

When crude oil comes into a refinery, it is processed in an atmospheric pipe still. The side stream of the pipe still is rich with light gas oil. Fluid catalytic cracking units, or catcrackers, split this gas oil into smaller, more useful molecules (Figure 11-9). Fluid catalytic cracking units use the following equipment during operation ... 

When complex equipment (e.g., a converter and fractionator in a fluid catalytic cracking unit) is designed, a stair structure with a vertical pipe rack must be located between both vessels, as shown in Exhibit 12-26. Although elevators are often used, diem approval must be obtained before they are included. The optimum layout includes arranging the vessel platforms for easy access from the structure. Clearance between the vessel and structure platforms must accommodate die growth of the vessels, which should be calculated to satisfy safety concerns. This structure eliminates the... 

Fluid coking and fluid catalytic cracking (FCC) are mechanically similar The products of fluid coking and delayed coking are the same (i.e., coke and distillate products), but the equipment is physically different. Alkylation of the three- and four-carbon molecule products from these units is commonly performed to convert them to branched chain gasoline, which increases the octane rating. As can be seen from Figure 1.1 in Chapter One, the feed to fluid catalytic crackers is a gas-oil distillate. For delayed cokers and fluid cokers, the feed is residium. 

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