CAJ | 학술논문

超低排放环保示范工程改造，在取得优异的超低排放成绩的同时，碰到了来自风烟系统的比较棘手的问题。阻力增加、体积流量减少的双重因素使引风机的运行点向不稳定区域移动从而造成风机在低负荷工况失速，导致引风机的“抢风”运行，使系统出现压力过高、膨胀节泄漏、进口挡板偏移、无法投入自动运行等问题。本文从引风机的性能曲线、状态点的分析出发，提出解决问题的6种方法，而采用了其中更换风机叶轮的方法。通过与历史数据的对比，提出了解决问题采取的临时措施。
초저배방배보시범공정개조，재취득우이적초저배방성적적동시，팽도료래자풍연계통적비교극수적문제。조력증가、체적류량감소적쌍중인소사인풍궤적운행점향불은정구역이동종이조성풍궤재저부하공황실속，도치인풍궤적“창풍”운행，사계통출현압력과고、팽창절설루、진구당판편이、무법투입자동운행등문제。본문종인풍궤적성능곡선、상태점적분석출발，제출해결문제적6충방법，이채용료기중경환풍궤협륜적방법。통과여역사수거적대비，제출료해결문제채취적림시조시。
The demonstration project transformation with ultra-low emission for environmental protection, which gets the excellent achievement, comes across a series of puzzling problems from the gas system. Because of double factors of re-sistance increase and volume flow rate decrease, the running state points of two induced draft fans move toward the unstable region, causing fan stalls on the low load conditions. Scrambling for air of induced draft fans come cross problems, such as high gas pressure, crack and leakage of bellows expansion joints, inlet baffle migration, and non-automatic operation.Based on analysis of operating points and characteristic curves of induced draft fans,this paper puts forward six solutions, among which replacement of fan impeller is used. By comparison and analysis between historical and present data, provisional mea-sures for solving the problems are put forward.