Section 4.8 Gas Absorption

See Section 4.2 for cost guidelines for packed and tray columns. See Section 10.1 for pressure vessels. 

Vacuum type c/s including vessel, pump, motor, drive and vacuum equipment. 

Forced draft packed c/s with fan, motor, tower, catch basin, level controllers, two s/s pumps and motors. FOB cost 40000 for a liquid flow rate = 6.3 L/s with n = 0.45 for the range 2-60. L+M = 1.7. L/M = 0.4. 

Gas stripping, forced draft, packed, ammonia Installed cost = 5 000 000 for a liquid flow rate = 200 L/s with n = 0.38 for the range 40-200 and n = 0.88 for range 200-4000 L/s. 

Gas stripping packed or tray column ammonia, column only with internals. FOB cost = 550000 at design flow rate of sour water = 12 L/s with n = 0.53 for the range 3-55 L/s. L+M = 3.0. Factors tower only, X 1.00 tower plus reboiler, condensers, accumulators, shutdown tankage, piping, X 4.2. Retrofit, X 1.6. 

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