METHOD FOR REDUCING CHROME YELLOW OF NITROGEN OXIDE ELIMINATION SYSTEM

摘要

The present invention relates to a method to reduce yellow plume of a nitrogen oxide removing facility, wherein an SNCR system and an SCR system are operated simultaneously by controlling the operation of the SNCR system and the SCR system when an operation load is 80% or greater; only the SNCR system is operated when the operation load is 80% or smaller; and only the SNCR system is operated when the entrance temperature of the SCR system is detected to be 300°C or lower. The SNCR system and the SCR system are controlled such that the supply of a reducing agent injected into the SCR system can be stopped while a spraying amount is maintained by widening a spraying width through a joint nozzle tip during the operation of the SNCR system. The present invention maximizes eco-friendliness by minimizing the visual discomfort, let alone prevents environmental pollutions, as the present invention can greatly reduce the generation of yellow plume while increasing the nitrogen oxide removing efficiency of the nitrogen oxide removing facility.