某超临界350MW机组增压风机(带旁路)的RB控制  

The RB Control of Booster-Fan(with Bypass) of a 350-MW Supercritical Unit

作　　者：王晓勇[1] 赵志丹[1] 郭三虎[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032

出　　处：《中国电力》2014年第10期137-141,共5页Electric Power

摘　　要：国家环保要求火电项目必须取消脱硫大旁路烟道,某电厂350 MW超临界机组的烟气脱硫系统(简称FGD)在配置单台增压风机的情况下若发生增压风机跳闸,则会造成锅炉主燃料跳闸(MFT)而被迫停炉。为保证机组长周期安全运行和减少机组非计划停运次数,该火电厂取消原设计脱硫烟气大旁路后增设增压风机旁路烟道,在增压风机故障跳闸后增压风机旁路快开并同时触发增压风机快速自动减负荷(RB)。通过对增压风机跳闸后的热工控制策略进行设计改进及不同负荷点的增压风机RB成功试验,消除了锅炉运行存在的不安全隐患,效果较好。The national environmental protection authority requires that the large FGD bypass shaft be removed from thermal power generation projects. In the FGD system of one 350-MW supercritical unit with single booster-fan, the boiler will be forced to shut down due to the boiler main fuel trip （bIFT） in the case of booster-fan trip. In order to ensure the unit long-term secure operation and reduce the number of unplanned outages, the original large FGD bypass is removed while a bypass for the booster-fan is built. At the time of booster-fan faults, the booster-fan bypass will be opened quickly and the booster-fan runback （RB） will be triggered simultaneously. Through the improvement of booster-fan control strategy and the successful RB tests at different loads, the unsafe hidden issues in boiler operation are resolved with satisfactory results.

关 键 词：火电机组 增压风机 快速自动减负荷(RB) 控制优化 控制策略 烟气压力 旁路系统 烟气脱硫(FGD) 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]