A METHOD AND A SYSTEM FOR REMOVING HYDROGEN SULPHIDE IONS (HS-) FROM A LIQUOR OF A PULP MILL PROCESS

A method for removing hydrogen sulphide ions (HS-) from a liquor (300) of a pulp mill process， the method comprising pumping the liquor (300) to an injector arrangement (710) using a pump arrangement (720) such that the pumping of the liquor (300) through a jet nozzle (115) generates suction at a gas inlet (130)， whereby reagent gas (310) is mixed with the liquor (300)， and letting out the treated liquor (300) from the injector arrangement (710) to a vessel (200). In this way， the liquor (300) is treated to form at least partly treated liquor (300). A corresponding use of an injector arrangement. A system for performing the method. A method for removing hydrogen sulphide ions (HS -) from a liquor (300) of a pulp mill process， the method comprising pumping the liquor (300) to an injector arrangement (710) using a pump arrangement (720) such that the pumping of the liquor (300) through a jet nozzle (115) generates suction at a gas inlet (130)， whereby reagent gas (310) is mixed with the liquor (300)， and letting out the treated liquor (300) from the injector arrangement (710) to a vessel (200). In this way， the liquor (300) is treated to form at least partly treated liquor (300). A corresponding use of an injector arrangement. A system for performing the method.