共查询到20条相似文献,搜索用时 93 毫秒
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从国内实际出发,开发了一套高效、价廉、以废治废的燃煤全过程脱硫技术,并对其机理做了详细的研究。 相似文献
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双碱法烟气脱硫技术新进展 总被引:8,自引:0,他引:8
徐永生 《城市环境与城市生态》1991,(2)
针对我国以排放SO_2和煤尘为主的煤烟型大气污染和在今后相当长时期内仍以燃煤为主的现状,开发在技术和经济上均具有吸引力的排烟脱硫技术已成为当务之急.本文介绍了新双碱法脱硫技术的原理和工艺流程,对比传统的双碱法,分析探讨了新法的特点,并展示该法在解决大气层中SO_2问题上的良好前景. 相似文献
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燃煤烟气脱硫副产物在酸性土上的农用价值与利用原理 总被引:11,自引:0,他引:11
燃煤烟气脱硫副产物作为废弃物对环境的潜在威胁,促使人们对其资源化利用研究的重视。文章针对红壤地区土壤普遍缺乏营养元素的问题,通过分析盆栽和田间试验结果,探讨燃煤烟气脱硫副产物在酸性土壤上的农用价值与利用原理。结果表明,燃煤烟气脱硫副产物富含作物所需的营养元素,而红壤地区土壤又普遍缺乏这些元素;它具有独特的形态特征和理化性能,在酸性土壤中可以产生协同效应,因而具极高的农用价值。在酸性土壤上适量施用,可以提高土壤养分含量,改善土壤理化性质,提高土壤供肥性能和持水能力,促进作物对养分的吸收,从而达到废弃物农业资源化利用的目的。 相似文献
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生物燃气具有清洁、高效、安全和可再生四大特征,在替代和补充天然气方面具有巨大潜力,正成为我国新能源战略的拓展方向之一.生物燃气的高值利用是推进产业化应用的重点,脱硫环节直接影响设备运行、产品品质和工程质量.与传统的脱硫工艺相比,生物脱硫具有效率高、无二次污染、处理成本低等优点,是新的研发热点和产业化应用方向之一.本文综述了生物燃气生物脱硫的基本原理、主要菌种、工艺过程、工程案例等最新研究与应用情况.重点对化能营养型硫细菌的生理生化特性及其脱硫性能进行了综合比较分析,并对它们基于生物洗涤塔原理的两段式沼气脱硫工艺的应用案例进行剖析.最后,对我国发展生物脱硫技术和工程应用提出了深入研发高效工艺、实现生物燃气产业化的建议. 相似文献
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从加氢精制、氧化脱臭、吸附脱硫、生物脱硫、光化学反应脱硫五个方面介绍了国内外轻质油品脱硫工艺和技术研究进展 ,并阐述了这些方法的特点、原理及脱硫性能 相似文献
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从加氢精制,氧化脱臭,吸附脱硫,生物脱硫,光化学反应脱硫五个方面介绍了国内外轻质油品脱硫工艺和技术研究进展,并阐述了这些方法的特点,原理及脱硫性能。 相似文献
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燃煤烟气脱硫石膏在新疆盐碱土壤改良中的应用研究 总被引:5,自引:0,他引:5
以燃煤烟气脱硫石膏作为化学改良剂,在新疆克拉玛依地区进行碱化土壤改良,土壤改良后种植新疆杨(Populus bolleana Lauche)、白榆(Ulmus pumila L.)、沙棘(Hippohgae rhamnoides L)。分析了烟气脱硫石膏对盐碱地土壤理化性质和树木生长状况的影响。结果表明:处理区土壤的pH值和全盐量比对照区有明显降低,处理区的原始碱化度越高,改良后碱化度的下降幅度越大,而且表层土壤中碱化度的下降最为明显,从29.9%下降到1.43%。改良后树木的平均成活率为71%,比对照区树木的成活率高41%,用燃煤烟气脱硫石膏改良新疆克拉玛依地区碱化土壤种植树木具有极大的推广应用价值。 相似文献
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Abdel Maksoud M. I. A. Fahim Ramy Amer Bedir Ahmed G. Osman Ahmed I. Abouelela Marwa Mohamed El-Sayyad Gharieb S. Elkodous M. Abd Mahmoud Amira S. Rabee Maisara M. Al-Muhtaseb Ala’a H. Rooney David W. 《Environmental Chemistry Letters》2022,20(1):519-562
The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.
相似文献12.
本文研究我国燃煤工业锅炉大气SO2的污染状况及发展趋势,以及应用工业固硫型煤控制燃煤工业锅炉大气SO2的污染。燃煤工业锅炉燃烧工业固硫型煤时,可明显地降低SO2和烟尘的排放量,并节约煤炭。推广和发展工业固硫型煤,是防治燃煤工业锅炉大气SO2污染的一条投资少、见效快、简便易行的实用措施,其经济效益及环境效益相当可观。 相似文献
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Using a standard Hotelling model of resource exploitation, we determine the optimal energy consumption paths from three options: dirty coal, which is non-renewable and carbon-emitting; clean coal, which is also non-renewable but carbon-free thanks to carbon capture and storage (CCS); and solar energy, which is renewable and carbon-free. We assume that the atmospheric carbon stock cannot exceed an exogenously given ceiling. Taking into account learning-by-doing in CCS technology, we show the following results: (i) clean coal exploitation cannot begin before the outset of the carbon constrained phase and must stop strictly before the end of this phase; (ii) the energy price path can evolve non-monotonically over time; and (iii) when the solar cost is low enough, an unusual energy consumption sequence along with solar energy is interrupted for some time and replacement by clean coal may exist. 相似文献
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Shou-Qing Liu 《Environmental Chemistry Letters》2012,10(3):209-216
Photocatalytic degradation of organic pollutants using suspended and dispersed semiconductor nano-photocatalysts in wastewater holds unique advantages, including high activity, low cost, solar utilization, and complete mineralization. But the recovery and reuse of photocatalysts are difficult because the fine particles are easily discharged in waters. Immobilization of photocatalysts on supports such as glass and zeolite results in decreased activities due to the low specific area and slow mass transfer. Furthermore, a large amount of the photocatalysts will result in colored contamination. Therefore, it is necessary to develop photocatalysts with a separation function for the reusable and cyclic application. In order to take advantage of the high activity and enable the semiconductor nano-photocatalysts to be reused, the concept of magnetic photocatalysts with separation function was raised. We review the photocatalytic principle, structure, and application of the magnetic semiconductor catalysts. 相似文献
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室内空气中多环芳烃污染的测量和特征性研究 总被引:20,自引:0,他引:20
本文就室内空气中多环芳烃典型污染源-室内燃煤和室内吸烟排放的多环芳烃组成和含量进行了测定,并同室外大气(对照)中多环芳烃组成含量进行了对比,研究了室内环境不同污染源排放多环烃组成和含量的特征性,结果表明,室内燃煤污染同燃煤型室外大气源排放多环芳烃具有相似组成含量特征,而室朵烟草烟雾污染源的多环芳烃组成含量特征,则与室外煤型和交通型均有显著区别。 相似文献
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Municipal Solid Waste (MSW) management in China has been transitioning from a mixed collection and treatment system to a separated collection and treatment system. The continuous rise of MSW treatment capacity and the optimization of technology structure provided basic facility support for China to promote MSW separation at source. China preferred a four-type separation system. Regulated recycling should be enhanced to improve the efficiency and sustainability of recycling industry. As food waste is the main composition of MSW in China, 20%–30% of the food waste diversion and land application could maximize the comprehensive environmental performance. Incineration is to be the pillar technology in MSW separated treatment system in China. 相似文献
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磁性介孔硅胶萃取剂的制备及萃取性能研究 总被引:1,自引:0,他引:1
合成了C18基团修饰的磁性介孔硅胶材料,并利用该材料建立了磁性固相萃取-色谱分析方法,测定了几种环境水样中酞酸酯类(PAEs)污染物的含量.结果表明,该材料具有较大的比表面积(273 m.2g-1)和饱和磁通量(29 emu.g-1),对水样中痕量的PAEs有较强的萃取能力,而且萃取剂的磁分离特性使得萃取操作更为方便、快捷.在优化条件下,30 mg萃取剂在40 min内即可从500 mL水样中萃取痕量PAEs,回收率可达80%以上.此外,该萃取剂在处理复杂环境样品时仍能保持较强的萃取能力,环境水样中4种PAEs的检测限可达15.6—32.5 ng.L-1,加标回收率为62%—109%,相对标准偏差为2%—8%. 相似文献
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Environmental Chemistry Letters - Membrane separation technology has become one of the most frequently used techniques to secure adequate water resources for human consumption and other... 相似文献
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An interdisciplinary strategy is outlined for characterizing the disposition of bioactive (toxic, teratogenic, mutagenic, and/or carcinogenic) materials in coal‐derived hydrocarbon liquids during upgrading processing. Engineering input is required to select representative PDU and pilot‐scale samples and appropriate processing schemes and conditions for upgrading experiments to ensure reliable extrapolation of results to demonstration and commercial scale. Biology expertise is required to perform and interpret short‐term in vitro cellular assays and whole‐animal toxicity and carcinogenesis testing on raw and upgraded samples. Chemical separation and identification of active classes and components in the samples aid in interpreting bioactivity results and in quantifying effects of various upgrading processes and conditions. The end result will be a data base for reliably assessing and addressing potential occupational and environmental safety and health concerns associated with upgraded coal‐derived liquids. An example of the value of this interdisciplinary approach is given by work performed on generically representative raw and hydrotreated SRC‐II gas oil samples. Biological and chemical characterization indicates significant loss of bioactivity during hydrotreatment, with one postulated mechanism being removal of primary amine groups from multi‐ring aromatic compounds. 相似文献