共查询到20条相似文献,搜索用时 125 毫秒
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外加磁场对磁流化床烟气脱硫过程的影响 总被引:1,自引:0,他引:1
研究了磁流化床脱硫过程中外加磁场对流化状态、脱硫效率和脱硫产物特性的影响,并分析了磁场强化脱硫的机理.结果表明:随着磁场的增强,磁流化床经历了3个阶段.在鼓泡流化状态下,床层压降不稳定,脱硫效率低;在磁稳流化状态下,床层压降小,脱硫效率快速提高;在磁聚状态下,床层压降较大,脱硫效率提高.兼顾脱硫效率和能源消耗两方面的要求,在磁稳流化状态下进行烟气脱硫是适宜的.此外,对脱硫产物微观形貌和化合物成分的分析表明:磁场改变了铁磁颗粒表面脱硫产物的附着方式,并促进了S(IV)的氧化,提高了SO2的吸收速率,从而提高了磁流化床的脱硫效率. 相似文献
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《动力工程学报》2017,(10):848-854
在旋转喷雾脱硫(Spray Drying Absorber,SDA)实验台上对低含湿量、高烟温的模拟焦炉烟气进行了脱硫实验,研究高入口烟气温度、高绝热饱和温差条件下,Na_2CO_3和Ca(OH)_22种脱硫剂的脱硫特性.讨论了化学计量比、脱硫塔入口烟温、绝热饱和温差和脱硫塔内烟气温降对脱硫效率的影响.结果表明:随化学计量比的增大,Na_2CO_3脱硫效率增长速率比Ca(OH)_2脱硫效率增长速率更快,当2种脱硫剂与SO_2的化学计量比分别达到1.1和1.5时,脱硫效率趋于平缓;脱硫效率随绝热饱和温差的增大呈指数形式下降;在保持出口烟气温度不变条件下,提高入口烟气温度有利于提高脱硫效率;脱硫塔内烟气温降增大也有利于提高脱硫效率. 相似文献
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采用两种细度石灰石作为脱硫剂,对喷淋式脱硫塔的脱硫特性进行了试验研究,试验结果表明在一定烟气流速下,脱硫效率随液气比的增大而增大;在高烟气流速下,脱硫效率随液气比的增大而增加的趋势更加显著.脱硫效率随着提高浆液的pH值而提高,随入口烟气SO,浓度增加而下降;石灰石粒径越小,其溶解性好,有利于提高脱硫效率.结合吸收段阻力... 相似文献
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循环流化床烟气脱硫技术实验研究 总被引:3,自引:0,他引:3
提出一种干式烟气脱硫技术方案,并在400 ̄800℃的温度下进行了实验研究。为了提高脱硫效率和脱硫剂的利用率,还对在床内循环的脱硫剂进行了蒸汽处理。研究了烟气温度、Ca/S、床内气流速度、床内固体物料浓度等参数对脱硫效率的影响,以及各参数之间的关系。研究发现温度对脱硫效率有明显的影响,近600℃时最高。增加Ca/S可以大幅度提高脱硫效率。此外,适当降低床内气体流速使床内的总物料量增加,可以提高脱硫效率。研究表明,蒸汽处理对脱硫效率的提高有明显效果,在本实验条件下,处理后的脱硫效率提高42.1%。 相似文献
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筛板参数对筛板式喷淋塔脱硫性能影响的实验研究 总被引:1,自引:0,他引:1
在筛板式喷淋塔实验台上进行了模拟烟气脱硫实验,考察了筛板开孔率、筛板孔径、筛板厚度、筛板安装位置等筛板设计参数对脱硫效率的影响。实验发现,当筛板孔径为15 mm时,开孔率在28%~36%范围内脱硫效率较高;当筛板开孔率为36%时,筛板孔径为12 mm时脱硫效率最高;合理的筛板厚度可以使脱硫效率提高1%~2%;筛板安装位置对脱硫效果也有一定影响,筛板安装高度为0.16 m时脱硫效果较好。合理布置筛板可以提高喷淋塔的脱硫效率。 相似文献
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基于煤气脱硫系统运行条件,模拟OMC法脱硫工艺过程,在小型试验台上对模拟煤气进行脱硫效率试验研究。讨论了在OMC法煤气脱硫过程中,碳酸钠溶液浓度、脱硫剂OMC浓度、入口H2S浓度等因素对煤气脱硫效率的影响,得出最优的脱硫生产条件,指出该法适用于煤气中硫化物含量波动大的脱硫方法,与传统ADA脱硫法相比更有利于脱硫效率的提高。 相似文献
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Dry granulation is an attractive alternative to water quenching because of saving energy and reducing water consumption. In many dry granulation technologies, the high-temperature molten slag is atomized to slag particles, and the thermal energy from high-temperature slag particles is recovered by physical and chemical methods. In the present study, a technique for thermal energy recovery from high-temperature slag particles using a gravity bed waste heat boiler was exploited. The heat transfer characteristics of a laboratory-scale gravity bed waste heat boiler were investigated. An increase in Reynolds number (Re) showed no effect on the heat transfer coefficient or recovery efficiency. However, the heat transfer coefficient and recovery efficiency increased with a decrease in particle diameter and an increase in the velocity of descending particles. Compared with those observed with an aligned arrangement of the boiler tubes, the heat transfer coefficient and the recovery efficiency were higher in a staggered arrangement. The semi-empirical relations regarding the heat transfer coefficient between slag particles and boiler tubes were obtained based on experimental data and can be used to calculate the heat transfer coefficient within a certain range. 相似文献
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The various reasons for specifying a totally integrated control system of the distributed type are discussed. As the plant is highly automated and comprises DENOX and desulfurisation equipment and a large coal handling yard, savings in cabling by using signal transmission through buses was also considered. Experiences during design, commissioning, and two years of operation, including failure rates, are presented 相似文献
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通过对LF精炼炉炉渣料构成及精炼功能的研究,开发出成渣时间短,脱硫效率高,吸附夹杂能力强使用方便的新型合成渣,使得钢液在精炼炉中的各项冶金功能得以有效实现,确保了品种钢开发和质量提升的要求。 相似文献
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《International Journal of Hydrogen Energy》2019,44(11):5171-5175
Sludge gasification for the production of hydrogen-rich gas is a promising technology. In this paper, a pilot study on the hydrogen-rich gas production by sludge gasification using waste heat of blast furnace slag was carried out, and the mass and energy balance of gasification process using waste heat from blast furnace slag were evaluated. The results show that the higher the gasification temperature, the higher the hydrogen content in the gas. When the gasification temperature reaches 880 °C, the hydrogen content in the gas reaches the maximum,35.3%. The technology of sludge gasification combined with waste heat recovery of high furnace slag is feasible. Its efficiency of heat recovery can reach up to 64.35%, and the gasification efficiency and energy consumption ratio can reach to 42.30% and 3.67, respectively. 相似文献
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With the exhaustion and deterioration of coal resource, a lot of research has been focused on improving the combustion efficiency all over the world, especially in China, in recent years. In this study, several industrial waste slags, which can decrease the ignition temperature, including the gasification slag, deactivated methanol catalyst and furnace slag, are reused as catalysts to improve the combustion efficiency of high-sulfur coal. The kinetic analysis of combustion reaction using Coats-Redfern's model indicates that the industrial waste slags could efficiently reduce the activation energy of coal ignition. By comparing and analyzing the composition of the waste slags with TG-DTG, XRD and XRF, the efficiency of combustion-supporting of the waste slags was confirmed and optimized. 相似文献
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