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简要介绍了富氧燃烧的节能机理及富氧的制备方法,对现有富氧燃烧技术进行了分类,并分别阐述了各类富氧燃烧的技术特点和富氧燃烧技术的经济效应. 相似文献
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根据富氧燃烧特点,结合冶金工厂加热炉实际情况,分析了富氧燃烧在各类加热环境中可能出现的燃烧特性变化,并根据实际情况提出了应用时需关注的重点问题。 相似文献
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热风炉富氧燃烧的经济性分析 总被引:1,自引:1,他引:0
论述并分析了热风炉获得高风温的措施,推算出了富氧燃烧与煤气富化的能源动力成本关系式,得出了热风炉富氧燃烧在经济上的可行性结论,并提出了热风炉富氧燃烧技术的应用方案. 相似文献
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轧钢加热炉上应用富氧燃烧的试验研究与技术分析 总被引:1,自引:0,他引:1
通过工业试验研究表明,富氧燃烧对加热炉生产有提高产量,节约能源,降低成本的作用,特别是加热炉加热能力不够又有丰富的氧气资源的企业,可以取得较好的效果. 相似文献
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A facile procedure was carried out to prepare macroporous perovskite-type complex oxide catalysts of La1-xKxCo1-yFeyO3(x=0,0.1,y=0,0.1) by using the combined method of organic ligation and solution combustion.This method could ensure the formation of the desired macroporous structures and the desired crystal phases of the prepared catalysts.It was found that the macroporous catalysts showed higher catalytic activities for soot combustion than that of the corresponding nanometric samples,and the macroporous ... 相似文献
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The ultrafine Ce-based oxide nanoparticles with different element dopings (Zr, Y) were synthesized by the method of mi- cropores-diffused coprecipitation (MDC) using ammonia solution as the precipitation agent. The activities of the catalysts for soot oxidation were evaluated by the temperature-programmed oxidation (TPO) reaction. Ce-based oxides prepared in this study exhibited high catalytic activity for soot oxidation under tile condition of loose contact between soot particles and catalysts, and the catalytic ac- tivity ofultrafine Ce0.gZr0 iO2 nanoparticle for soot combustion was the highest, whose/"10, Ts0 and Sco2m was 364, 442 ~C and 98.3%, respectively. All catalysts were systematically characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brumauer-Emett-Teller (BET), Fourier transform infrared spectroscopy (FT-IR) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). It was indicated that the MDC method could prepare the ultrafine Ce-bascd oxide nanoparticles whose the crystal lattice were perfect, and the BET surface area and average crystal size of the ultrafine nanoparticles changed with the different element dopings (Zr, Y). The H2-TPR measurements showed that the ultrafine Ce-based ox- ide nanoparticles with the doping-Zr cation could be favorable for improving the redox property of the catalysts. 相似文献
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某碳质金精矿直接氰化浸出金浸出率很低,小于30%,为进一步提高金浸出率,针对碳质金精矿性质,进行了富氧焙烧—氯化浸出试验研究。结果表明:与常规氧化焙烧相比,富氧焙烧降低了焙烧温度,缩短了焙烧时间;富氧焙烧最佳焙烧温度550℃~600℃,氧气体积分数50%,焙烧时间2. 0 h,在此条件下,碳、硫去除率均在95%以上;焙砂采用M-Na Cl氯化浸出,在最佳浸出条件为固液比1∶6,浸液p H=3,浸出剂用量8 kg/t,试样粒度62~75μm,浸出时间4 h时,金浸出率可达92. 50%,相对于试样直接氯化浸出时有显著提高;表明富氧焙烧—氯化浸出工艺是可行的。 相似文献
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O2/CO2燃烧技术应用于燃煤锅炉是捕获和储存CO2的有效方法之一。高浓度、高比热值CO2的存在对煤粉的着火特性和锅炉炉内的温度场分布有重要影响。利用Fluent流体力学软件,以300MW煤粉锅炉为物理模型,对比煤粉锅炉在O2/CO2与空气下炉内温度场分布的差异,分析含氧浓度、二次风温度对锅炉炉内温度场的影响。结果表明:煤粉在O2/CO2比空气气氛下着火有所延迟,火焰中心位置升高,炉内的整体温度偏低,燃烧稳定性差;随富氧程度和二次风温的增加,煤粉燃烧与火焰传播特性改善,当O2/CO2体积比为29/71时炉内温度水平提高较快,与空气助燃条件下炉内温度分布接近。 相似文献
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Nanostructure K2NiF4 type oxides La2-xKxCuO4 complex oxides were prepared using the Sol-Gel method, characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), and Scanning Electron Microscopy (SEM). The catalytic activity for soot combustion was evaluated by the Temperature-Programmed Reaction (TPO) technique. The results demonstrated that the substitution quality of K^+ for La^3+ at the A-site would increase the catalytic activities of La2-xKxCuO4 for soot combustion greatly; the substitution quality affected the structure and catalytic activity obviously. The La1.8K0.2CuO4 complex oxides with tetrahedral structures had the best catalytic activity for soot combustion, and the ignition temperature of soot combustion was lowered from 490 to 320 ℃. 相似文献