Treatment Technology and Practice of NOx in Flue Gas from Pellet Production
This paper presents an overview of the NOx control technology measures and production practices implemented for the chain grate machine-rotary kiln pellet process at Zibo Tieying Iron & Steel Co.,Ltd.To address the unique NOx characteristics and emissions from the chain grate machine-rotary kiln,the company implemented the SCR-SNCR combined denitration technology.This decision was informed by comprehensive market research,on-site inspections,technical analyses,and scheme evaluations.Innovations and modifications in the segmentation of the chain grate machine and its flue structure have been implemented.These changes have enhanced the NOx capture efficiency in the flue gas,ensuring stable emissions that meet regulatory standards.Additionally,there has been an approximate 15％reduction in the actual consumption of the reductant compared to the planned values,resulting in lowered operational costs for denitration.
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