摘要：研究烟气中粉尘颗粒在余热回收换热器中的沉积行为,采用数值模拟的方法分析管式烟气换热器中粉尘颗粒的沉积规律。结果表明:大部分粉尘颗粒沉积在换热管壁面的迎风面以及侧面;粒径较小的粉尘沉积率较小,沉积率并不随着粒径的增大发生明显改变;粒径较大的粉尘颗粒的沉积率较大,沉积率随粒径的增大而增大。

关键词：余热回收；粉尘；换热器；颗粒沉积

Abstract: The deposition behavior of flue gas dust particles in a heat exchanger used for waste heat recovery was investigated. The deposition laws of dust particles in a tubular flue gas heat exchanger were analyzed using numerical simulation. The results show that most dust particles are deposited on the windward side wall and the side wall. The deposition effectiveness of the particles with smaller size is small. The deposition effectiveness does not change significantly with increase of the particle size. The deposition effectiveness of the particles with larger size is large. The deposition effectiveness increases with increase of the particle size.

Keywords： waste heat recovery； dust； heat exchanger； particle deposition