METHOD FOR SUPPRESSING ELUTION OF HARMFUL TRACE ELEMENTS AND COAL FIRED POWER GENERATION SYSTEM

摘要

The present invention addresses the issue of providing a method for suppressing elution of harmful trace elements, whereby the elution of harmful trace elements from fly ash can be suppressed and the occurrence of slagging and fouling inside a combustion boiler can be suppressed. This method is for suppressing elution of harmful trace elements in a coal fired power generation system comprising a pulverized coal machine 141 that pulverizes coal and produces pulverized coal and a combustion boiler 16 that combusts the pulverized coal produced by the pulverized coal machine 141, by using primary air and secondary air supplied at a later stage than the primary air. An elution inhibitor that suppresses the elution of harmful trace elements from the pulverized coal combustion residue is supplied to the combustion boiler 16 together with the secondary air.