| 摘要 |
PURPOSE: A reducing-agent injection method of an NOX(nitrogen oxide) treatment system is provided to prevent the injection instability of reducing agent by non-uniform concentration of NOx of gas or deflection of gas. CONSTITUTION: A reducing-agent injection method of an NOX(nitrogen oxide) treatment system is applied to an SNCR(Selective Non-Catalytic Reduction) system, an SCR(Selective Catalytic Reduction) system, or a hybrid system, which treats NOx in combustion gas from a boiler(1). The flow rate of steam from the boiler is measured and the injection amount of reducing agent is determined depending on the results. After control by the flow rate of steam of the boiler is performed, secondary control is performed depending on the injection amount of reducing agent.
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