CAJ | 학술논문

蒸汽相变作为预处理措施能显著提高常规除尘设备对PM_(2.5)细颗粒的脱除效率,但对于水汽含量低的原始燃煤烟气蒸汽耗量太大,限制了工程应用,而在燃煤电厂湿法烟气脱硫(WFGD)过程中,烟气降温增湿,再添加少量蒸汽就可以建立PM_(2.5)凝结长大所需要的过饱和环境,进而实现WFGD系统对PM_(2.5)的协同高效脱除.在分析蒸汽相变促进PM_(2.5)脱除影响因素的基础上,结合湿法脱硫过程传热传质特性,定性分析了脱硫塔塔前、塔内和塔出口添加蒸汽对WFGD系统脱除PM_(2.5)的促进作用,并提出具体工艺方案.
증기상변작위예처리조시능현저제고상규제진설비대PM_(2.5)세과립적탈제효솔,단대우수기함량저적원시연매연기증기모량태대,한제료공정응용,이재연매전엄습법연기탈류(WFGD)과정중,연기강온증습,재첨가소량증기취가이건립PM_(2.5)응결장대소수요적과포화배경,진이실현WFGD계통대PM_(2.5)적협동고효탈제.재분석증기상변촉진PM_(2.5)탈제영향인소적기출상,결합습법탈류과정전열전질특성,정성분석료탈류탑탑전、탑내화탑출구첨가증기대WFGD계통탈제PM_(2.5)적촉진작용,병제출구체공예방안.
Removal efficiency of PM_(2.5) can be considerably improved if they are enlarged by heterogeneous condensation of water vapor. However, it cannot be directly applied to removal of fine particles from coal fired flue gas due to low moisture content. In wet FGD process, hot flue gas contacts normal temperature scrubbing liquid, causing gas phase temperature to decrease and relative humidity of flue gas to increase, which make it possible to remove PM_(2.5) efficiently by adding a little vapor. The cooperative removal of PM_(2.5) from wet FGD by adding steam in gas inlet and above the scrubbing liquid inlet of the scrubber, and at the outlet of scrubber respectively was qualitatively analyzed, which is based on factors affecting heterogeneous condensation and mass and energy transfer process during desulfurization.