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151.
In this paper, removal of NOx(namely DeNOx) from flue gas by radical injection combined with NaOH solution(26% by weight of NaOH in water) scrubbing was investigated. The experimental results showed that the steady streamer corona occurs through adjusting the flow rate of the oxygen fed into the nozzles electrode. The vapor in the oxygen has influence on the V-I characteristics of corona discharge. Both HNO2 and HNO3 come into being in the plasma reactor and the DeNOx efficiency in the plasma reactor is more than 60%. The overall DeNOx efficiency of the whole system reaches 81.7 % when the NaOH solution scrubbing is collaborated. 相似文献
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新形势下,中国生态环境监测面临新任务和新挑战,迫切需要明确发展思路和方向。因此,从环境监测管理体系、业务体系、标准方法体系等方面,举例浅析了美国、欧盟等发达国家和地区环境监测业务的发展现状,并从法制建设、体系优化、方法标准等方面对比分析了中国与发达国家和地区的差异及不足,总结归纳了适用于中国国情的先进经验与启示。在此基础上,初步研判了当前和今后一段时期中国生态环境监测的发展方向,并提出了相关建议,为加快推动实现中国生态环境监测的跨越式发展提供参考和借鉴。 相似文献
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采用富集法从柴油污染的土壤中分离到一株能以苯甲酸钠为唯一碳源而生长的产水溶性荧光色素的Pseudomonas sp,其荧光色素在121℃、30min不被破坏.通过转座子Tn5插入诱变,再次证明Tn5所携km~Rsm~R基因可在革兰氏阴性菌Pseudomonas sp中表达,其Sm~Rkm~R双抗突变频率为10~(-6)-10~(-7)/受体细胞,从上述双抗子中可再选出功能突变菌落,频率约0.5%.其中有2株为荧光消失型,2株为荧光增强型,1株为苯甲酸钠利用能力缺陷型,1株为营养缺陷型,2株为生长缓慢型. 相似文献
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Gang Xiao Mingjiang Ni Yong Chi Yuqi Jin Jiaquan Zhang Qi Miao Kefa Cen 《Frontiers of Environmental Science & Engineering》2007,1(4):498-503
In order to eliminate secondary pollution caused by municipal solid waste (MSW) incineration, a MSW gasification and melting process is proposed. The process is expected to reduce the emission of pollutants, especially heavy-metals and dioxins. In this paper, the combustible components of MSW and simulated MSW were gasified in a lab-scale fluidized bed at 400°C–700°C when the excess air ratio (ER) was between 0.2 and 0.8. The experimental results indicated that the MSW could be gasified effectively in a fluidized bed at approximately 600°C–700°C when excess air ratio was 0.2–0.4. The melting characteristics of two typical fly ash samples from MSW incinerators were investigated. The results indicated that fly ash of pure MSW incineration could be melted at approximately 1,300°C and that of MSW and coal co-combustion could be melted at approximately 1,400°C. When temperature was over 1,100°C, more than 99.9% of the dioxins could be decomposed and most of the heavy-metals could be solidified in the slag. Based on the above experiments, two feasible MSW gasification and melting processes were proposed for low calorific value MSW: (1) sieved MSW gasification and melting system, which was based on an idea of multi-recycle; (2) gasification and melting scheme of MSW adding coal as assistant fuel. 相似文献
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可接受风险的界定方法探讨 总被引:17,自引:0,他引:17
着重论述了可接受风险的概念及界定方法 ,丰富了风险研究的理论及方法 ,旨在为风险管理提供更加有意义的参考。 相似文献
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