Application Of Low NO_x M-PM Burner In Ultra-low Emission Reform Project Of A 1000 MW Ultra Supercritical Unit

With the rapid growth of industry and shortage of fuel,the environmental problem is becoming more and more urgent.Acid rain,haze,sand storm and water quality deterioration happen at a higher frequency than before.The comfort level of civilians is tightly associated with the environment which then attracts a growing attention of civilians.Coal is the main fossil fuel of China.The thermal power plant is the main source of 90 percents sulfur dioxide（SO₂）,67 percents of oxynitride（NO_x）,70 percents of dust and 43percents mercury（Hg）in the air.Improving the efficiency of power plant and releasing less pollutant are the forever topic of electricity generation field and the basic assurance of sustainable development to electricity industry and national economy as well.“Coal power energy saving and emission reduction promotion and improvement plan（2014-2020）”requires the newly built thermal power plant must conform to the standard of gas turbine.Likewise,some of the on-grid thermal power plants are required to reach the standard as well.This proposes a big challenge to thermal power plants.And promoting“Ultra Low Emission”now becomes the only way for thermal power plants.Ultra Low Emission is to reduce the thermal power plants emission to be equal or even less than the gas turbine emission standard through effective multi pollutant cooperative control technology which raises the efficiencies of existing denigration,desulfurization and dust extraction equipments.The on-grid high parameter and large capacity units are equipped with an advanced low NO_x combustion control system and denigration technology,but these technologies no longer fit the Ultra Low Emission requirements.With the strict standard,it is quite urgent to improve the low NO_x combustion control system to lower the input N concentration of the denigration system,therefore,reaching the gas turbine emission standard and saving the denigration cost as well.Based on the existing PM low NO_x burner layout and the combustion system,the essay takes the boiler of JinLing#1 unit for example and analyzes the main factors which affect the NO_x generation.Combined with the operation experience after production and the successfully applied Mitsubishi M-PM burner technology,the essay also talks about the feasibility of the M-PM combustion technology to reduce the NO_x generation of double tangential burner.Moreover,from the safety and economy aspects of the boiler and based on combustion experiments,the essay points out the practical problem of the M-PM technology in operation and proposes relatively solutions,providing a new method for other same-type generation units and making this technology complete.Since the feasibility,reliability and advancement of this technology,it has a bright future in the thermal power generation industry.