阻火型脉冲袋式除尘器在焦炉除尘系统中的应用

阻火型除尘器以它独特的阻火技术,克服了常规脉冲袋式除尘器的弱点,延长了滤袋的寿命。焦炉拦焦除尘系统应用阻火型脉冲袋式除尘器,拦焦侧烟尘捕集率大于90%,岗位粉尘浓度和除尘器出口排放浓度均达到了国家标准要求。     

烟气超低排放用湿式静电除尘器技术应用分析

结合国家环保要求,介绍了实现烟气超低排放的湿式静电除尘器的原理,并对比了三种主流结构湿式静电除尘器的技术特点,通过对燃煤锅炉超低排放工程实际应用情况,进行了技术分析。     

烧结机尾除尘改造方案的对比分析

为满足国家钢铁行业大气污染物新颁标准排放限值要求,对265m~2烧结机尾除尘器进行改造,从烟尘特性、工程投资、运行费用、维修费用等几个方面,将电袋复合式除尘器和脉冲布袋除尘器方案进行比较,选择合理的除尘器改造方案,改造后达到了环保要求,取得了较好的经济效益。     

脉冲布袋除尘在烧结机机尾粉尘治理中的应用

对影响除尘器运行的因素进行了分析,通过对机尾除尘器的合理有效改造,达到控制粉尘排放浓度和减少粉尘排放总量的目的.     

新型高效旋风除尘器的研制

本文介绍一种在一个除尘设备上能同时进行“三级”除尘的高效旋风除尘器。由于采用了三个新技术,即:一是附设2个“VCP”集尘箱;二是采用了旋风溢流坝,三是将长锥体改成平底。从而减少了粉尘的上涡旋“短路”和沿程的二次“反弹”,使新型旋风除尘器的除尘效率明显高于传统的旋风除尘器,并且降低了除尘器的高度。新型除尘器特别适用于烟尘浓度含量高的炉窑设备上。一、前言近几年的统计资料表明,燃煤排放的大气污染物数量约占燃料燃烧排放的96％;燃煤排放的烟尘约占燃料燃烧排放的99％。一     

干熄焦除尘技术在济钢的应用

济钢干熄焦工程采用陶瓷多管除尘器和湿凝聚式除尘器组合的水膜除尘技术，经合理设计，达到了同时去除烟尘和烟气中二氧化硫的目的，除尘效率达到98％，气体排放低于国家标准，年创效益25．69万元。     

高效文氏管除尘器在备煤车间粉碎机系统上的应用

水钢煤焦化公司粉碎机除尘系统采用了文氏管除尘器对原有布袋式除尘器进行了改造，经一年多时间使用表明除尘机组运行良好，其除尘效果显著(除尘效率由原来的61.4％提高到94．98％)，满足了生产现场对环境的要求，达到了国家允许的排放标准。     

电站静电除尘器的改进

电站静电除尘器是热电85t/h锅炉的重要设备,它对保证排烟、使含尘浓度满足环保要求,起到很大作用。 该电除尘器是日本电站工程制造公司1986年的产品,其特点是:直流高压电源装设在静电除尘器顶部,通过母线直接和绝缘子联接,因而解决了一般静电除尘器电缆易出故障的问题。     

管束除尘器在烧结脱硫塔的应用

介绍了某厂烧结机头粉尘排放超标后的治理,鉴于环保与生产的双重压力,尝试管束除尘器的改造、试用,并取得成功,为冶金企业环境治理提供多元选择。     

电袋复合除尘器在烧结机机尾除尘中的应用

针对龙钢原265 m2烧结机机尾电除尘系统除尘效果差、达不到国家排放标准的情况,通过现场分析,结合目前国内电袋复合除尘器的研究和应用成果,决定在除尘改造中采用电袋复合除尘器。改造后取得了良好效果,为电袋除尘器在烧结系统中的应用提供了借鉴。     

龙首矿节能潜力分析与对策研究

为了落实国家节能减排政策,评价矿山节能减排潜力,对金川公司龙首矿近几年来节能方面的工作进行了分析,找出了与国内先进坑采矿山企业的差距,提出了合理建议,有利于提升矿山企业节能水平.     

Spectroscopic Properties of Er^3＋-Doped TeO2-WO3-ZnO-ZnF2 Glasses

The Er^3 -doped TeO2-WO3-ZnO-ZnF2(TWZOF) glasses were prepared. The absorption spectra, 1.5μm emission spectra and fluorescence lifetimes of Er^3 , excited at 970nm, were measured. The J-O parameters Ωt(t=2, 4, 6), absorption and emission cross-sections were calculated. The dependence of the 1.5μm emission intensity, fluorescence lifetime and bandwidth of the Er^3 emission upon the contents of ZnF2 in glass were investigated. In TWZOF glass, Er^3 ions had a broad emission profile around 1.5μm with the maximum FWHM of 83nm. With the increasing of the content of ZnF2, the emission intensity at peak wavelength and the fluorescence lifetime of Er^3 at 1.5μm increase.     

Yb3+，Er3+掺杂Y2Ti2O7荧光粉的制备与上转换发光机理研究

采用溶胶-凝胶法制备合成了(Y_0.98-xYb_xEr_0.02)₂Ti₂O₇(x=0, 0.02, 0.04...0.10)荧光粉, 分别采用XRD和荧光光谱仪对样品的结构和上转换发光性能进行了表征.研究了Yb3+掺杂浓度对样品上转换发光性能的影响, 并对样品的发光机理进行了研究.结果表明, 所得样品为面心立方结构的烧绿石相.在980nm激发下, 样品展现出很强的上转换荧光发射并且发光颜色可以通过Yb3+掺杂浓度来调节.样品上转换绿光和红光发射均为双光子过程并且交叉弛豫过程在上转换红光发射过程中占据主导作用.      

Characterization of Process Conditions in Industrial Stainless Steelmaking Electric Arc Furnace Using Optical Emission Spectrum Measurements

Emission spectroscopy is a potential method for gaining information on electric arc furnace (EAF) process conditions. Previous studies published in literature on industrial EAF emission spectra have focused on a smaller scales and DC arc furnaces. In this study emission spectrum measurements were conducted for 140t AC stainless steelmaking EAF at Outokumpu Stainless Oy, Tornio Works, Finland. Four basic types of emission spectra were obtained during the EAF process cycle. The first one is obscured by scrap steel, the second is dominated by thermal radiation of the slag, the third is dominated by alkali peaks and sodium D-lines and the fourth is characterized by multiple atomic emission peaks. The atomic emission peaks were identified by comparing them to the NIST database for atomic emission lines and previous laboratory measurements on EAF slag emission spectra. The comparison shows that the optic emission of an arc is dominated by slag components. Plasma conditions were analyzed by deriving plasma temperature from optical emissions of Ca I lines. The analysis suggests that accurate information on plasma conditions can be gained from outer plasma having a plasma temperature below 7000 K (6727 °C).     

Luminescence enhancement of BaMgSiO4：Eu^2＋ by adding borate as flux

The luminescence of EU^2＋ in BaMgSiO4 with BaB2O4 as flux was studied. The emission spectrum of the phosphor consisted of two bands, peaking at about 398 nm and 515 nm, which were attributed to the emissions from different Eu^2＋ sites in the lattice. When the BaB2O4 flux was applied, the intensity of the 398 nm emission was not clearly affected, but the intensity of the 515 nm emission was enhanced by about ten times. Gaussian fitting showed that the emission band at around 515 nm could actually be resolved into two bands with peak wavelengths of 499 nm and 521 nm, respectively. The assignments of the emission bands to the cation sites were carried out according to the values of bond valence. The overlapping of the 398 nm emission band on the excitation band of 515 nm emission implied that energy transfer could occur from the luminescent center related to the 398 nm emission to the center related to the 515 nm emission, and the energy transfer process remarkably enhanced the intensity of the 515 nm emission band. The phosphor had strong excitation at around 350-400 nm and emitted a bright green luminescence. Thus it could have applications as a green component in solid-state lighting devices assembled by near-UV Light Emitting Diodes （LED） combined with tricolor phosphors.     

某铅冶炼企业碳排放量年度变化分析及减排建议

某铅冶炼企业碳排放量占比最大的是能源的原材料用途排放,其次是燃料燃烧排放。通过对该企业2011-2013和2018-2020年间二氧化碳排放量和二氧化碳排放强度进行对比分析,采用改变能源种类和使用清洁能源的方式,使吨二氧化碳排放强度显著降低近60%和1.27%。实现了该冶炼企业绿色低碳、节能、降碳和减污的目的。     

钢铁生产CO2过程排放分析

钢铁生产成为大气中温室气体CO2的一大来源,准确测算钢铁生产CO2过程排放量是评估企业或行业减排的保障。建立基于CO2排放模块的CO2排放模型,选定国内典型钢铁生产企业进行分析,发现炼铁工序的CO2排放占总流程的60%左右,同时进一步分析了整体CO2排放强度与吨钢能耗的关系及工序CO2排放强度的分布。     

基于CSC方法的钢铁行业节能减排技术潜力分析

为了研究中国钢铁行业的节能减排潜力,以35项钢铁行业先进节能减排技术为研究对象,建立节能供应曲线(Conservation Supply Curve,简称CSC)模型,分析影响钢铁行业的节能减排收益、成本效益以及钢铁生产流程工序层面的节能减排潜力因素。结果表明,这35项技术全部应用可实现3.01 GJ/t的节能量以及398.22 kg/t的CO2减排量。将结果与第十三个五年计划推广技术作对比,在当前情况下,约有50%的推广技术并不符合成本效益;运用CSC模型进行了钢铁生产流程工序层面的节能减排潜力研究,得到各个工序的节能量和减排量,并据此分析了各项技术未来的发展趋势和应用前景。     

辉光放电发射光谱仪器和应用进展

对辉光放电发射光谱的原理进行了介绍。描述了辉光放电发射光谱仪设备的进展,对其在成分分析和表面分析上的一些应用进行了展示。还介绍了辉光谱图深度分辨率模型。最后提出了辉光放电发射光谱以后发展需要解决的问题。     

Mechanism of SrS∶Ce Thin Film Electroluminescence

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