To effectively improve the aerodynamic field characteristics in the furnace,theoretical calculation and analysis were conducted on the equipment and operating parameters of a 300 MW boiler.This article investigates the variation characteristics of the primary air velocity,secondary air velocity,and the ratio of secondary air to primary air flow at the burner outlet of a four corner tangential combustion boiler under design and deep peak shaving conditions.The results showed that under deep peak shavingconditions,the primary air velocity at the burner outlet only slightly decreased compared to the design value of the turbine heat acceptance(THA)condition,while the secondary air velocity at the burner outlet showed a significant decrease,resulting in a significant decrease in the dynamic ratio of secondary air to primary air,and a significant decrease in the organization ability of secondary air to the furnace aerodynamic field.According to the calculation results,as the boiler load decreases,the more layers of non operational burners there are,the smaller the impact on the aerodynamic field of the furnace.The greater the cooling air volume of the non operational burner layer,the greater the impact on the aerodynamic field of the furnace.
four corner tangential combustion boilerdeep peak shavingnozzle outlet flow rateaerodynamic field characteristics
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