Flue gas treating system and process

Details Flue gas treating system and process Flue gas treating system and process

1997-09-11

1999-07-27

Woo, Jay H.

Gas separation: processes

Liquid contacting

And degasification of a liquid

95181, 95187, 95232, 95235, 96181, 96182, B01D 5334

Patent

active

059284137

ABSTRACT:
This invention provides a flue gas treating system and process which include a counterflow absorption tower and which can reduce the ammonia concentration in the treated flue gas to a low level. This system includes an absorbing fluid tank (21) which is installed separately from an absorption tower tank (1) and into which the absorbing fluid after coming into gas-liquid contact with untreated flue gas in an absorption tower (2) and before flowing down into the absorption tower tank (1) is introduced; first injection means for injecting the absorbing fluid within the absorption tower tank (1) into the absorption tower (2) at a first position above the flue gas inlet section (3) thereof so as to bring this absorbing fluid into gas-liquid contact with the untreated flue gas; and second injection means for injecting the absorbing fluid within the absorbing fluid tank (21) into the absorption tower (2) at a second position above the first position so as to bring this absorbing fluid into gas-liquid contact with the untreated flue gas prior to the absorbing fluid within the absorption tower tank (1).

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