Optimization Of Oxidation Wind For Desulfurization Under The Background Of Flexible Power Generation

In recent years,my country’s power industry has continued to develop,and the installed capacity of new energy sources such as photovoltaics and wind power have continued to increase.At the same time,the requirements for flexibility in peak shaving of thermal power units have become higher and higher.In this context,a large number of thermal power units have begun to carry out technical transformation of flexible power generation,and gradually began to carry out deep peak shaving.However,the flue gas desulfurization(FGD)system using wet desulfurization process lacks the ability of rapid adjustment and depth adjustment.The centrifugal oxidation fan can only maintain a constant speed operation,and cannot make corresponding adjustments according to changes in the desulfurization load.Therefore,it is of great significance to study the energy-saving optimization of the oxidation air of the desulfurization system under low load.This paper simulates the oxidation process in the absorption tower of the desulfurization system through sulfite oxidation experiments under different working conditions.Studies have shown that temperature,pH,sulfite concentration,agitator speed,oxidizing air volume,and liquid level will all affect the oxidation effect,thereby affecting the demand for oxidizing air.Among them,pH,oxidizing air flow rate and absorption tower liquid level have the greatest influence on oxidation efficiency.However,in actual operation,the pH and oxidizing air flow change are basically small,but the liquid level fluctuates greatly.Therefore,it is necessary to keep the liquid level of the absorption tower stable,and a too low liquid level will greatly reduce the forced oxidation rate of sulfite.From the big data analysis of the desulfurization system,the stability,economy,and environmental protection of the four units are compared.The research shows that the final comprehensive scores of the four units are not much different.However,the economic score is significantly lower than the stability and environmental protection scores.Therefore,it is necessary to explore a more economical and reasonable operation mode to,reduce the plant power consumption rate of the desulfurization system and improve the economic performance of the unit This paper uses two engineering transformations to verify the energy-saving optimization methods of different oxidation fans Roots blowers use frequency conversion technology to reduce the output of Roots bloewers under low load.ln a power plant test base in Hebei,through frequency conwersiotr transformation,the lowest frequency of the Roots blower at the desulfurization load was reduced to 20 Hz,which can reduce energy consumption by up to 60%.The centrifugal fan adopts the mother control technology.When the desulfurization load of the two units is reduced to less than 70%at the same time,the electric door of the oxidizing wind contact mother.pipe can be opened so that the two absorption towers share an oxidizing fan,and it was successfully carried out in a power plant in Henan.Transformation.