Application of Control Strategy for Ammonia Injection Amount Based on Flue Gas Denitrification of Sintering Machine in Steel Mill
According to the relevant requirements of the Opinions on Promoting Implementation of Ultra-low Emissions from the Iron and Steel Industry,sintering of steel mill faces the pressure of flexible operation and ultra-low emissions,and the load change of the sintering machine also puts forward stricter requirements for the control of SCR denitration system.Based on the control requirements in the denitration transformation process of sintering flue gas from a large steel mill,the denitration process,SCR characteristics,control influence factors and other aspects were analyzed and studied,and the layout scheme of desulfurization first and then denitration process was adopted,the traditional control strategy was optimized in combination with the ammonia injection control characteristics,and the flue gas emission production process was smoothly controlled,and the process control function requirements for the transformation were met,which were of reference significance for the denitration transformation of other steel mills and NOx control strategies.
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