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当前烟气脱硫脱硝技术分为许多种,从典型的烟气同时脱硫脱硝技术出发,总结了当前新兴技术,并且在我国烟气同时脱硫脱硝技术发展现状基础上对今后发展方向进行了展望。 相似文献
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脱硫脱硝一体化技术作为火电厂烟气处理技术日益受到人们的关注。简要介绍了几种典型的联合脱硫脱硝技术和同时脱硫脱硝技术的工艺流程、特点和应用前景,并对我国火电厂烟气脱硫脱硝一体化技术的发展提出了几点建议,对实际应用具有一定参考价值。 相似文献
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燃煤锅炉烟道气产生的烟尘是造成大气污染的主要原因之一,其主要成份是有害的SO2和NOX。但是脱硫脱硝两个催化过程相互影响,所以烟道气治理的发展方向是脱硫脱硝一体化技术。按机理的不同,将烟道气脱硫脱硝一体化技术分为两类:联合脱硫脱硝技术和同时脱硫脱硝技术,文章综述了目前国内外开发的各种一体化工艺。 相似文献
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活性焦联合脱硫脱硝技术及其在我国的适用性分析 总被引:2,自引:0,他引:2
介绍了国内外脱硫脱硝工艺技术的发展情况;重点分析了活性焦联合脱硫脱硝技术的机理、工艺特点及应用状况;该技术可以在合适的温度区间有效地脱除烟气中的SO_2和NO_x,简化了烟气净化工艺,脱除过程基本不耗水、不产生二次污染,还实现了对硫的资源化利用,是适合我国国情的烟气脱硫脱硝技术。 相似文献
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烟气同时脱硫脱硝技术进展 总被引:1,自引:0,他引:1
二氧化硫和氮氧化物主要来源于烟气。烟气处理是环境保护的重要任务。叙述了传统的湿式烟气脱硫和氨选择性催化还原组合脱硫脱硝的优缺点,介绍了几种烟气同时脱硫脱硝的技术及其最新进展,分析了它们的原理、特点和应用。 相似文献
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本文探讨了利用电炉炼钢粉尘进行型煤燃烧固硫和烟道气脱硫的可能性,实验测定和理论计算了典型的电炉粉尘的硫容量约为5.5mmol/g;当其作为型煤固硫添加剂时,固硫效果显著;当其作为烟道气脱硫剂时,脱硫率可达95%以上,反应活性很高。进一步加工,有望发展为固定床用脱硫剂,达到以废治废的目的。 相似文献
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Fluor公司开发的Fluor SO_2净化工艺具有广泛多样的工艺布局,可以通过经济的方式定制脱除烟气中的有害组成。该工艺几乎能去除全部SO_2并减少CO排放。Fluor SO_x净化工艺的主要步骤已在多套工业装置中得到成功的证实。除技术可行、经济合理之外,Fluor SO_x净化工艺不会产生任何有害副产物,也不会遇到与SO_3 有关的腐蚀问题。此外,该工艺生产高纯度可市售的元素硫。论述了Fluor SO_x净化工艺的特征、技术和成本优势、设计和操作的简易性以及实施的便利性。 相似文献
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Performance with Respect to Flue Gas Composition of a Combined Desulfurization/Denitration Process Using Powder-Particle Fluidized Bed 下载免费PDF全文
A new combined desulfarizatinn/denitraticon (DeSOx/DeNOx) procees was teeted in this study. The procees uses the so-called powder-partlcle fluidized bed (PPFB) as the major reactor in which a coarse DeNOx catalyst, several hundrsd micrometers in size, is fluidized by flue gas as the fluidization medium particles while a contlnuogsly supplied fine DeSOx sorbent, several to tens of micrometers in dianteter, is entrained with the flue gas. Ammonin for NOx reduction is fed to the bottom of the bed, thus, SOx and NOx are simultaneously removed in the single reactor.By adopting a model gas, SO2-NO-HaO-N2-air, to simulate actual flue gas in a laboratory-scale PPFB, simultaneous SO2 and NO removals were explored with respect to various gas components of flue gas. It was found that the vaxlations of SO2 removal with concentrations (fractions) of oxygen, water vapor, SO2 and NO in flue gas are little affected by the simultaneous NOx reduction. However,the dependencles of NO removal upon such gas components are clveely related to the inter-actions between DeSOx sorbent and DeNOx catalyst. 相似文献
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《中国化学工程学报》2019,27(2)
Fossil fuel combustion is one of the major means to meet the mounting global energy demand. However, the increasing NO_x and N_2 O emissions arising from fossil fuel combustion process have hazardous effects. Thus, mitigating these gases is vital to attain a sustainable environment. Interestingly, oxy-fuel combustion in fluidized bed for carbon capture and minimized NO_x emissions is strongly sustainable compare to the other approaches. It was assessed that NO_x formation and fuel-N conversion have significant limitation under oxy-fluidized bed compared to air mode and the mechanism of NO_x formation is still deficient and requires further development. In addition, this review paper discussed the potential of primary measure as low emission process with others supplementary techniques for feasible NO_x reduction. The influences of combustion mode, operating parameters, and reduction techniques such as flue gas recirculation, oxygen staging, biomass co-firing, catalyst, influence of fluidized bed design and structure, decoupling combustion and their merges are respectively evaluated. Findings show that significant minimization of NO_x emission can be achieved through combination of primary and secondary reduction techniques. 相似文献