350MW机组脱硫氧化风机节能优化试验

Experiment on energy saving optimization test of desulfurization and oxidation fans for 350 MW units

以某厂350 MW机组脱硫氧化风机的运行方式为研究对象,监测2台和1台氧化风机运行时,脱硫吸收塔浆液的溶解氧质量浓度和机组负荷、烟气脱硫装置(FGD)入口SO2质量浓度和浆液pH值之间的关系。同时,选取溶解氧的质量浓度=1.5 mg/L作为吸收塔浆液得到充分氧化的标准,最终确定在不同负荷和不同FGD入口SO2质量浓度下,氧化风机的最佳运行方式。结果表明,通过氧化风机的运行优化,每年可节约厂用电1.1×10^6kW·h,对电厂脱硫系统的节能降耗与环保控制具有重要意义。

Taking the operation mode of a desulfurization and oxidation fans for a 350 MW unit as research object, by monitoring the operation mode within 2 oxidizing fans and 1 oxidizing fan,the relationships between the dissolved oxygen concentrationin of desulfurizing absorber slurry and the unit load, the SO2 concentration at FGD inlet and the pH of the slurry are obtained. At the same time,1.5 mg/L dissolved oxygen is selected as the standard line of full oxidation of slurry,which determines the optimum operation mode of the oxidizing fan at different loads and SO2 concentrations at the inlet of FGD.The results show that by optimizing the operation of the oxidizing fan, the power consumption for the plant can be saved by 1.1×10^6 kW·h every year. It is of great significance to the energy saving and environmental control of the desulfurization system in the power plant.