Mist elimination/air toxic control in a wet scrubber using a condensing heat exchanger

A method for removing contaminants from a flue gas, comprising the steps of:

• channeling a flue gas upwardly into a vertically arranged wet scrubber housing having an inlet at a bottom end of a main portion with an outlet at the other top end;
• spraying the flue gas in a counter-current contact with sprayers positioned in the main portion of the housing with a cleaning liquid for removing some of the contaminants from the flue gas;
• providing at least one gas-liquid contact means in the main portion of the housing beneath the sprayers to promote gas-liquid contact;
• collecting droplets from the sprayed flue gas;
• passing the flue gas upwardly through an array of tubular condensing heat exchangers positioned in the main portion of the housing above the sprayers for removing remaining entrained contaminants from the flue gas by cooling the flue gas;
• and
• channeling the flue gas out of the housing through the outlet.