Valmet Technologies Oy

Tero Juutilainen

Kari Haaga

Naveen Chenna

Markku Isoniemi

Piia Niemi

A method for removing ammonia (NH) from a gas produced in a pulp mill (). The method comprises producing raw non-condensable gas comprising ammonia (NH) in the pulp mill () and transferring at least some of the raw non-condensable gas to a scrubber () containing aqueous scrubbing solution (). The method comprises adding a compound capable of decreasing a pH of the scrubbing solution to the scmbbing solution () and in the scrubber (), contacting the raw non-condensable gas with the scmbbing solution (), to react the ammonia (NH) of the raw non-condensable gas with the scmbbing solution to produce clean non-condensable gas and ammonium (NH). A pulp mill comprising equipment for performing the method.

Method for removing ammonia from non-condensable gases of a pulp mill

An arrangement and a method in a soda recovery boiler, in a furnace () of which recovery boiler there are arranged screen tubes () and which recovery boiler comprises a second pass () in which is arranged at least one superheater ('). The second pass () is arranged for being cooled with cooling medium coming from the screen tubes ().

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Tero Juutilainen