共查询到20条相似文献,搜索用时 62 毫秒
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利用微生物调整表面强化煤炭中细粒黄铁矿的脱硫技术 总被引:11,自引:0,他引:11
评述了我国煤炭生产,污染,发展和脱硫的现状与趋势;提出以细粒黄铁矿脱除为主的煤炭脱硫发展方向,介绍了微生物表面调整、改性、强化细粒黄铁矿脱除的技术和效果,指出了工业应用面临的问题,主要研究内容及解决办法。 相似文献
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高硫煤中硫的分布和燃前脱硫可行性的研究 总被引:11,自引:0,他引:11
根据对我国20多个高硫煤的分析,高硫煤中硫的分布以黄铁矿硫为主,黄铁矿硫中有一半为单体解离状态,约1/4为浸染状态,其它为共生和充填状态。常规洗选对黄铁矿硫的总脱除率为35%左右。洗选后精煤的有机硫有增加的趋势。原煤硫分>3%的煤炭,洗精煤的硫分一般在2%左右。燃烧前洗选脱硫是最经济的脱硫方法,利用黄铁矿的密度大大高于煤炭密度的特点,可以用重力分选方法有效地脱除解离的黄铁矿硫。由于黄铁矿的疏水性和煤相似,浮选柱和浮选机脱硫的效果都不佳。煤炭破碎有利于黄铁矿解离。确定选煤方法时,要考虑脱硫效率。 相似文献
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煤炭生物脱硫技术的研究及其应用 总被引:1,自引:0,他引:1
针对目前煤炭生物脱硫技术的研究,首先介绍了目前脱硫微生物的分类,其次对微生物的两种脱硫机理进行了阐述,还对微生物的脱硫方法及其应用进行了分析和讨论,最后介绍了影响煤炭微生物脱硫的因素、煤炭微生物脱硫技术中存在的问题以及煤炭生物脱硫技术的应用前景。 相似文献
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电解锰渣的化学成分与水泥的组成要求有较好的一致性,但高硫特性限制了其在水泥工业的应用。采用X-射线衍射仪(XRD)、热重-差示扫描量热仪(TG-DSC)和场发射扫描电镜-能谱仪(SEM-EDS)等手段分析了电解锰渣的基本物理化学特征。用高温还原焙烧法脱除电解锰渣中的S,研究了焙烧温度和煤掺量对烧渣的物相和S含量的影响。结果表明,电解锰渣中的主要结晶矿物为石膏、赤铁矿和石英;在不同温度下焙烧,当煤掺量不大于20%时,S含量随温度的升高呈下降趋势;煤掺量为25%时,S含量随温度的升高,先升高后降低;煤掺量为15%时的锰渣,当焙烧温度为1000℃,保温1 h后S含量最低,为3.12%,烧渣中的主要物相为Fe2O3、Fe3O4和Ca SO4。实验结果为电解锰渣的资源化利用提供了新的途径。 相似文献
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沸石既是氨氮的吸附剂也是硝化细菌的生长介质.介绍了生物沸石脱氨氮技术的国内外研究进展,分析了生物沸石脱氨氮新技术的原理并对其在制革废水脱氨氮中的应用进行了展望. 相似文献
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介绍了西曲8#煤含硫情况,根据破碎前后硫分、灰分对比分析结果,指出采用破碎的方法可使8#煤中黄铁矿、夹矸充分解离,原煤在破碎后硫分明显降低,原煤破碎是8#高硫煤脱硫途径之一。 相似文献
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Guillermo Baquerizo Anne Chaneac Luis Arellano-García Armando González-Sánchez Sergio Revah 《Mine Water and the Environment》2013,32(4):278-284
Uncontrolled release of thiosulfate can cause high oxygen demand, or generate toxic compounds under anaerobic scenarios. Biooxidation of thiosulfate in a biotrickling filter (BTF) colonized by an alkaliphilic sulfide-oxidizing bacterial consortium was studied at pH ≈10. Inlet thiosulfate concentrations were varied from 3.5 to 21.3 g L?1, with a residence time of 216 s, emulating conditions encountered in wastewater from mining processes. Sulfate production, oxygen concentration, and biomass in both packing and effluent were periodically analyzed to characterize bioreactor performance. Removal efficiencies near 100 % were obtained during the entire experimental period, with a maximum elimination capacity of 242 g thiosulfate m?3 h?1. Although the BTF was able to transfer large amounts of oxygen to biooxidize thiosulfate to sulfate, under high initial thiosulfate loads, thiosulfate was not completely oxidized to sulfate, since biooxidation was conditioned to oxygen supply. Respirometric tests performed to investigate biomass adaptation and activity revealed oxygen consumption values of 0.5 mmol O2 (g protein)?1 min?1 for the period with the highest thiosulfate inlet load. 相似文献
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Treatment of Acid Leachate from Coal Discard using Calcium Carbonate and Biological Sulphate Removal
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An integrated approach is proposed for treating acidic coal discard leachate, consisting of CaCO3 handling and dosing, CaCO3-neutralization, and biological sulphate removal. It was found that: powdered CaCO3 can be slurried to a constant density and used to neutralize the acid water, remove Fe (II), Fe (III), and Al, and partially remove the sulphate (to saturation level); biological sulphate removal can be used to lower the sulphate to less than 200 mg/L using ethanol as the carbon and energy source; CO2 produced during calcium carbonate treatment can be used for H2S-stripping and; H2S gas recovered in the sulphate removal stage can be used for iron removal. 相似文献