摘要
Abstract
For the thermal power stations in which make-up water were produced with traditional ion exchange system and Integrated Membrane Technology separately, the main factors affecting steam cation conductivity are residues of the organics in raw water and dynamic variation about bacterial reproduction in reducing environment, respectively. If gel type anion resin had been replaced with macroporous strong base anion resin, the remaining TOC in traditional ion exchange system could be significantly reduced. And if non-oxidative bactericide had been dosed before or after Ultrahigh Purity Filter, bacteria could be effectively killed. Make-up water TOC standard limit should be controlled in 400/Nμg/L or less and 200μg/L or less(N%, rate of supplement make-up water, N>1) with respect to superheated steam pressure within 12.7~18.3 MPa and greater than 18.3MPa, respectively. For drum boilers and once-through boilers which superheated steam pressure are greater than 18.3MPa, in order to guarantee the cation conductivity (25℃) values of feed water less than the standard of 0.10μS/cm , TOC values in feed water should be under 50μg/L.关键词
超超临界机组/给水/总有机碳/主蒸汽/氢电导率Key words
USC unit/feedwater/total organic carbon (TOC)/main steam/cation conductivity分类
信息技术与安全科学
