添加湿空气对湿法脱硫净烟气中细颗粒物脱除性能

发布时间：2018-03-11 15:40

  本文选题：湿法脱硫净烟气　切入点：细颗粒物　出处：《东南大学学报(自然科学版)》2016年01期 　论文类型：期刊论文

【摘要】：借鉴大气环境中暖湿气流和冷空气交汇形成降水的原理,开展了在湿法脱硫净烟气中注入适量湿空气促进细颗粒物(PM_(2. 5))凝结长大脱除的研究,数值计算了脱硫净烟气与湿空气混合后的水汽过饱和度及可凝结水汽量分布特性.采用实际燃煤试验平台,在脱硫净烟气中添加湿空气来建立细颗粒凝结长大所需的过饱和水汽环境,考察了湿空气温湿度、添加量和脱硫净烟气温度等对细颗粒物脱除的影响.结果表明:添加适量湿空气可有效促进湿法脱硫净烟气中PM_(2. 5)脱除,混合气体过饱和度、可凝结水汽量随烟气与湿空气的相对湿度的升高及二者温差的增大逐渐增加;脱除效率随烟气温度的上升以及湿空气添加量和相对湿度的增加而增加,因此添加湿空气的方式特别适合于脱硫净烟气温度较高(≥55~60℃)的场合.
[Abstract]:Based on the principle of the convergence of warm and wet air and cold air to form precipitation in the atmospheric environment, the study of adding a proper amount of wet air into the net flue gas of wet desulphurization to promote the removal of fine particulate matter (PMSP) condensation and growth is carried out. The water vapor supersaturation and condensable water vapor distribution characteristics after the mixing of desulfurized net flue gas and wet air are numerically calculated. The actual coal burning test platform is used. The supersaturated water vapor environment needed for fine particle condensation and growth was established by adding wet air to desulphurized net flue gas. The temperature and humidity of wet air were investigated. The effects of addition amount and flue gas temperature on the removal of fine particulate matter. The results show that the addition of proper amount of wet air can effectively promote the removal of PMSP 2.5) and the supersaturation of mixed gases in WFGD net flue gas. The amount of condensable water vapor increases with the increase of the relative humidity of flue gas and wet air and the increase of temperature difference between them, and the removal efficiency increases with the increase of flue gas temperature, the amount of wet air and the relative humidity. Therefore, the method of adding wet air is especially suitable for the situation where the desulfurization net flue gas temperature is higher (鈮，

本文编号：1598815