1000MW Ultra Supercritical Thermal Power Unit Operation Optimization

Thermal power unit operation optimization aims to improve the efficiency of theunit and reduce emissions, based on the real-time monitoring operation index of the unit,according to the theory of optimum, after each subsystem optimization experiments andthe analysis of the system integration can make the unit under the condition of differentload, environment and other objective factors remain the most reasonable matchingparameters and operation mode.Analyze the influencing factors of the boiler efficiency and the method to determinethe boiler operation parameters. Use the boiler efficiency and pollutant emission levels toevaluate boiler operation efficiency. The combustion adjustment test and operationparameters optimization of DG3000/26.15-â…¡ultra-supercritical boiler specific include:Boiler oxygen content under different load adjustment test, air distribution adjustmenttest, change the swinging angle of burner test, the boiler load test, etc. Draw theoptimization suggestions: we should stable combustion, ensures the pulverized coalconcentration, and try to make sufficient oxygen when load is low, in order to controlpollutant emission and prevent the burner nozzle coking, must reduce oxygen andincrease primary air when load is high. The AA throttle opening in the flue gastemperature and wall temperature deviation reasonable circumstances should be fullyopen; decreasing auxiliary air and increasing surrounding air can improve the efficiencyof boiler combustion, but emissions will increase accordingly; OFA damper opening setto100%can reduce the emissions of pollutants; AA wind keep level direction, burnernozzle angle can swing up small; Integral style with the system automatically adjust canget best economical and less pollutant emission, and turbine side running parametersefficiency rule and optimization suggestions are proposed. Along with the load increase,the main steam temperature impact parameters on the coal consumption is more andmore strong; reheat steam temperature effect on coal consumption increasingly weakened;The main steam pressure parameters effect on coal consumption gradually weakened andweakening trend is more and more fast; exhaust steam pressure parameters effect on coalconsumption will become weak; high pressure cylinder and low pressure cylinderefficiency of unit energy consumption gradually decreases, and the influence of middlepressure cylinder efficiency of influence on the unit energy consumption increase.Established based on the initial parameters of the variable condition of optimalinitial pressure model, using Mathcad software compiled in the early pressureoptimization algorithm, optimization of different boundary conditions of1000MW optimal initial pressure curves. The cold end of the unit operation optimization, analysisof the micro turbine power characteristics, feed water pump energy consumption and thecondenser load characteristics, integration of condenser under different boundaryconditions are best pressure and circulating water pump operation mode.