Multi Objective Optimization Design And Analysis Of Super Low NO_x Combustion In Ninghai Power Plant No.1

This paper takes 600 MW coal-fired unit as the research object,using low NO_x dual scale improved combustion technology,combined with their own experience and the actual operation of the boiler operation,to transform the before and after the test of boiler based on the collection and analysis of the test data,the accumulation under different conditions of the actual operation of the boiler and the corresponding data operation scheme,the main combustion zone the burner and the burnout zone are set on the swing mechanism,reducing the size of the area is within the scope of the scheduling,expand the adjustable reduction zone.Compression main combustion zone,so that the main combustion zone and the combustion of precision matching,but also for the reduction of the area to find out the extra space.The establishment of multi-purpose node function area,from a global perspective,the rational layout of the pulverized coal air chamber and air chamber,which also has a stable combustion,low NO_x,high temperature corrosion and anti coking and multiple functions,with two scale combustion technology unique technology.Mass use of wall air to ensure furnace safety.On the main bur ner down technology,by SOFA nozzle design,multi nozzle for swing up and down,multi angle multi nozzle burned air nozzle,to achieve effective coverage of the burned zone furnace,pulverized coal burnout,and the control level of the furnace outlet tempe rature uniformity.Horizontal and vertical multi partition of unity,so that NO_x in the initial combustion to be suppressed and initial reduction.Through the improvement of low NO_x combustion technology in Ninghai No.1 furnace,the optimal design is achieved.Debug optimization will rely on years of North China Electric Power Research Institute to experience low NO_x combustion system of boiler unit,to achieve the expected goal of anti slag,highly efficient combustion and low NO_x emissions.Achieve long cycle operation,to achieve long-term stable SCR inlet 100mg/Nm3 of the operating conditions of ultra low NO_x emissions.At the same time to provide reference basis for the transformation of the same kind of coal-fired units in the ultra low NO_x.