Patent ID: 7077884

Claim:
A hydrogen sulfide scrubber comprising: a first scrubber tank and first scrubber media contained therein, said first scrubber tank having a gas flow inlet to receive a hydrogen sulfide-containing gas flow and a gas flow outlet; a second scrubber tank and second scrubber media contained therein, said second scrubber tank having a gas flow inlet connected downstream from the gas flow outlet of said first scrubber tank; a first scrubbing solution circulator comprising a first dispenser for dispensing a first scrubbing solution into contact with said first scrubber media, a first sump for collecting the first scrubbing solution after contact with said first scrubber media, and a first circulating pump for circulating the first scrubbing solution from said first sump back to said first dispenser after contact with said first scrubber media; a second scrubbing solution circulator comprising a second dispenser for dispensing a second scrubbing solution into contact with said second scrubber media, a second sump for collecting the second scrubbing solution after contact with said second scrubber media, and a second circulating pump for circulating the second scrubbing solution from said second sump back to said second dispenser after contact with said second scrubber media; a polymeric amine supply connected to said second scrubbing solution circulator; and a scrubbing solution charging line for supplying a portion of the second scrubbing solution to the first scrubbing solution to charge the first scrubbing solution with the polymeric amine.