火电机组脱硫增压风机消裕技术分析与实践

Analysis and Practice of Allowance-Reducing Technology for FGD Booster Fan of Thermal Power Plants

针对火电厂脱硫增压风机普遍存在裕量大、运行效率低的问题,提出了降低增压风机的裕量、提高增压风机的运行效率的改造思路。对某火电厂200 MW机组脱硫增压风机的运行工况进行计算分析,认为该增压风机裕量大、运行效率低。在此基础上提出降速消裕改造方案,并分析了该方案的可行性与经济性,将脱硫增压风机利用降速消裕技术实施现场改造后,运行结果表明,可降低厂用电率0.22%,节能效果显著。

In view of the excessive allowance and low operating efficiency existing in FGD booster fans of thermal power plants,the transformation idea of reducing the allowance and raising the efficiency is put forward.Calculations and analyses for the FGD booster fan for a 200-MW unit are carried out,which indicates that the allowance of the fan is excessive and the operating efficiency is low.Therefore,a scheme for slowing down the speed and eliminating the allowance is promoted with the feasibility and economics being analyzed.After the transformation,operation indicates that the service power rate is reduced by 0.22%,which is very remarkable in energy-saving.