燃煤电厂烟气冷凝除尘试验研究

通过在某300 MW燃煤机组湿法烟气脱硫(WFGD)系统的脱硫塔出口搭建烟气旁路,测试具有冷凝除尘作用的塑料型换热管束的传热系数、烟气侧阻力特性及除尘性能。结果表明:管束传热系数在350 W/(m^2·K)以上,烟气侧阻力随烟气流速增加而明显增大,除尘效率达到58.6%,出口粉尘质量浓度在4.5 mg/m^3左右;采用冷凝除尘技术不仅可以除尘,还能够回收烟气中的热量和水分。

Experimental Study on Flue Gas Dust Removal by Condensation Process for a Coal-fired Power Plant

A flue gas bypass line was set up at the tower outlet of a wet flue gas desulfurization(WFGD)system in a 300 MW coal-fired unit to measure the heat-transfer coefficient,gas side resistance and dust removal performance of the plastic heat-transfer tube bundles with condensation process.Results show that the heat-transfer coefficient is above 350 W/(m^2·K);the gas side resistance significantly increases with rising velocity of flue gas;the dust removal efficiency gets up to 56.8%,and the outlet mass concentration of dust particles is about 4.5 mg/m^3.Via the technology,not only dust removal can be realized,but also the heat and water can be recycled from the flue gas.