某1000 MW燃煤机组脱硫废水烟道雾化蒸发系统设计

Design of a desulfurization wastewater evaporation system in flue gas duct for a 1 000 MW coal-fired power plant

燃煤电厂脱硫废水采用烟道雾化蒸发处理技术进行处理,该技术具有投资运行成本低、系统简单等优点,近年来得到了大量关注。根据某1 000 MW燃煤机组烟气参数和除尘器入口前烟道布置情况,通过流场模拟对脱硫废水烟道雾化蒸发系统进行了优化设计,在除尘器入口前的烟道内加装导流板能够显著优化烟道内的烟气流场工况,有效避免粉煤灰的积灰和结垢,提高系统运行的安全性和稳定性。通过对除尘器运行参数及粉煤灰成分的分析,脱硫废水烟道雾化蒸发系统的运行不影响除尘器的运行和粉煤灰的品质。

Desulfurization wastewater evaporation technology in flue gas duct is taken by coal-fired power plants and gains a lot of attention for its lower investment and operation cost,and simple structure.Based on the flue gas parameters and arrangement of flue duct in front of the precipitator inlet of a 1000MW coal-fired power plant,the optimization design was made on the desulfurization wastewater evaporation system in flue gas duct by flow field simulation.The deflectors installed in the flue duct in front of the precipitator inlet could significantly optimize the flue gas field in the flue duct,effectively alleviate the fly ash accumulation and fouling,and improve the safety and stability of the system.Analyzing the operating parameters of the precipitator and the composition of the fly ash,the operation of the desulfurization wastewater evaporation system in flue gas duct does not affect the operation of the precipitator and the quality of the fly ash.