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燃煤电厂烟气脱硫有关问题的思考 总被引:2,自引:0,他引:2
就燃煤电厂烟气脱硫相关问题,如排污费的使用,工艺技术的选择,脱硫公司的资质,电价的核定,脱硫设备的国产化,管理的规范化等进行了讨论。 相似文献
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《火电厂烟气脱硫关键技术与设备国产化规划要点》摘要 总被引:10,自引:0,他引:10
介绍国家贸易委员会印发的《火电力烟气脱硫关键技术与设备国产化规划要点》:火电厂SO2排放和控制状况,烟气脱硫工艺的选择,烟气脱硫国产化面临的形势及主要问题,烟气脱硫国产化目标和措施。 相似文献
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我国的能源结构决定了燃煤火力发电在电力供应中的重要地位,其发电产生的SO2是环境污染的主要来源。烟气脱硫技术是控制燃煤工业SO2排放的重要途径,因其脱硫效率高、稳定性较好、成本较低等优点而在工业上得到了广泛的应用。概述了燃煤发电中烟气脱硫技术的最新进展,其中包括烟气脱硫技术的分类,以及几种主要的湿法、干法、半干法烟气脱硫技术的主要特点。对不同的烟气脱硫技术的优缺点也作了简单评述,并对新建电厂脱硫技术的选择进行了讨论。最后结合中国实际,烟气脱硫技术发展和应用中要注意的几个问题进行了讨论。 相似文献
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高效回流式循环流化床烟气脱硫及除尘技术 总被引:5,自引:0,他引:5
介绍GRAF/WULFF回流式循环流化床烟气净化技术的基本工艺,特点及共设计和运行经验,成功的设计和运行业表绩表明,GRAF/WULFF技术已经可以成熟地,没有技术风险于大中型脱硫设备,单个反应塔即可进行400MW燃煤电厂的烟气脱硫,污染物去除率可达99%。 相似文献
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《矿山资源开发利用与环境保护》2002,(3):10-12
在烟气脱硫技术中,石灰石-石膏湿法在世界烟气脱硫市场上占有的份额约为85%。其工艺特点是要产生一定量的废水,目前北京第一热电厂和杭州半山电厂对该废水进行处理,但由于设备全部从国外引进,因此费用昂贵。本文对废水来源、性质及处理方式作了简要分析,希望有助于加快脱硫装置国产化的进程。 相似文献
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烟气脱硫系统的腐蚀与防腐 总被引:2,自引:0,他引:2
介绍了燃煤电厂烟气脱硫系统腐蚀的主要部位,产生腐蚀的原因及主要的防腐措施,防腐措施包括:用合金材料、玻璃纤维及增强热固性树脂材料制造设备;用橡胶、陶瓷等材料作衬里;控制烟气温度在露点以上等。 相似文献
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介绍了厦门嵩屿电厂4×300 MW燃煤机组烟气海水脱硫系统所选用的工艺,分析了海水FGD系统的主要技术特点,为日益增多的同类型脱硫装置的工艺设计与设备选型提供一定的借鉴. 相似文献
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In this study, polyethylene terephthalate (PET) waste from post-consumer soft-drink bottles and crude glycerol from the biodiesel industry were used for the preparation of polyols and polyurethane foams. PET waste was firstly depolymerized by the glycolysis of diethylene glycol. The glycolyzed PET oligomers were then reacted with crude glycerol at different weight ratios to produce polyols via a series of reactions, such as esterification, transesterification, condensation, and polycondensation. The polyols were characterized by titration, viscometry, gel permeation chromatography (GPC), and differential scanning calorimetry. Subsequently, polyurethane (PU) foams were made via the reaction between the produced polyols and polymeric methylene-4,4′-diphenyl diisocyanate and were characterized by mechanical testing, scanning electron microscopy, and thermogravimetric analysis. Polyols from crude glycerol and their PU foams were also prepared to compare properties with those of polyols and PU foams from PET and crude glycerol. The influence of aromatic segments existing in glycolyzed PET and glycerol content on the properties of the polyols and PU foams was investigated. It was found that aromatic segments of polyols from glycolyzed PET helped increase their molecular weights and improve thermal stability of PU foams, while high glycerol content in polyols increased the hydroxyl number of polyols and the density and compressive strength of PU foams. 相似文献
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在燃煤电厂建设运行的同时,将引起一系列的水土流失问题.以四川国电金堂电厂二期扩建工程为例,简要说明项目区水土流失预测的内容和方法,并在其基础上对可能产生的水土流失和危害进行了分析,同时介绍了建设期和运行期采取的综合防治措施,为类似工程的水土保持提供借鉴. 相似文献
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Pyrolysis of virgin and waste polypropylene and its mixtures with waste polyethylene and polystyrene 总被引:1,自引:0,他引:1
A comparison of waste and virgin polypropylene (PP) plastics under slow pyrolysis conditions is presented. Moreover, mixtures of waste PP with wastes of polyethylene (PE) and polystyrene (PS) were pyrolyzed under the same operating conditions. Not only the impact of waste on degradation products but also impacts of the variations in the mixing ratio were investigated. The thermogravimetric weight loss curves and their derivatives of virgin and waste PP showed differences due to the impurities which are dirt and food residues. The liquid yield distribution concerning the aliphatic, mono-aromatic and poly-aromatic compounds varies as the ratio of PP waste increases in the waste plastic mixtures. In addition to this, the alkene/alkane ratio of gas products shows variations depending on the mixing ratio of wastes. 相似文献
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首先对北京市居民每年购买新衣服的数量、支出、穿着时间、淘汰原因,以及闲置衣服的处理方式、数量等进行了调查与分析,然后对北京市居民对旧衣物回收利用的认识、回收形式及其处理方式,对旧衣物如何处理回收、再利用的担忧,对希望旧衣物回收箱摆放的场所等进行了调查与分析。其研究结果对废旧纺织品回收体系建设、制度及政策制定具有一定的参考价值。 相似文献
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Photo-oxidation and Photo-toxicity of Crude and Refined Oils 总被引:2,自引:0,他引:2
Richard F Lee 《Spill Science & Technology Bulletin》2003,8(2):157-162
The fate and effects of an oil spill are effected by solar radiation through the action of photo-oxidation and photo-toxicity. Photo-oxidation, an important process in the weathering of oil, produces a variety of oxidized compounds, including aliphatic and aromatic ketones, aldehydes, carboxylic acids, fatty acids, esters, epoxides, sulfoxides, sulfones, phenols, anhydrides, quinones and aliphatic and aromatic alcohols. Some of these compounds contribute to the marine biota toxicity observed after an oil spill. Photo-toxicity occurs when uptake of certain petroleum compounds, e.g. certain polycyclic aromatic hydrocarbons and benzothiophenes, is followed by solar exposure which results in much greater toxicity than after dark uptake. The mechanism of PAH photo-toxicity includes absorbance of solar radiation by the PAH which produces a free radical and this free radical in turn reacts with oxygen to produce reactive oxygen species that can damage DNA and other cellular macromolecules. While most studies on photo-toxicity have been carried out in the laboratory, there are studies showing that water from an oil spill is photo-toxic to bivalve embryos for at least a few days after the spill. Other studies have found that oil contaminated sediments are photo-toxic to several marine invertebrates. More studies are required to determine if marine fauna at an oil spill site are effected by the action of photo-toxicity and photo-oxidation. 相似文献
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Novel and innovative pyrolysis and gasification technologies for energy efficient and environmentally sound MSW disposal 总被引:26,自引:0,他引:26
Malkow T 《Waste management (New York, N.Y.)》2004,24(1):53-79
Within the context of European Union (EU) energy policy and sustainibility in waste management, recent EU regulations demand energy efficient and environmentally sound disposal methods of Municipal Solid Waste (MSW). Currently, landfill with its many drawbacks is the preferred option in the EU and many other industrialised countries. Within the waste management hierarchy thermal disposal especially incineration is a viable and proven alternative. But, the dominating method, mass-burn grate incineration has drawbacks as well particularly hazardous emissions and harmful process residues. In recent years, pyrolysis and gasification technologies have emerged to address these issues and improve the energy output. To keep the many players in the field comprehensively informed and up-to-date, novel and innovative technology approaches emphasising European developments are reviewed. 相似文献
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Angelaki A. Sakellariou-Makrantonaki M. Tzimopoulos C. 《Water, Air, & Soil Pollution: Focus》2004,4(4-5):241-251
Soil water cumulative infiltration affects the environment by controlling the irrigation rate and consequently the water and pollutants movement through the ground. In order to study the cumulative infiltration in a sandy soil sample, experiments were performed in the laboratory. The sample was placed uniformly in a transparent column with an inner diameter of 6 cm. A constant head boundary condition of a 2 mm height was applied on the surface of the sample and the cumulative volume of the incoming water was measured. Soil moisture at four locations of the column was measured, by using the TDR method in order to obtain the moisture profiles. By comparing the values of the infiltrated water volumes with those calculated by the integration of the moisture profiles, a good agreement was found out. Also the Parlange theoretical model fitted very well with the infiltration experimental points. 相似文献
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介绍了回收酸性气体生产硫磺的工艺原理与工艺流程,论述了影响硫磺回收装置生产能力的诸多因素与扩能改造的情况。扩能改造后,该装置的酸性气体处理量平均为976m^3/h,瞬时处理量可达1200m^3/h,硫磺的生产能力从4450t/a提高到7500t/a,生产能力提高了68.5%,装置总硫回收率达到93.5%。 相似文献