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用燃烧法处理站点内排放出的硫化氢废气,H2S转化为SO2的转化率接近100%,本文主要从治理工艺、治理效果及结论三个方面对某采油作业区H 2S废气的燃烧法脱除进行阐述。 相似文献
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Shinji Koyamat 《纺织服装周刊》2000,(45)
仅以本文浅介碳纤维的应用及其未来的展望,同时介绍东丽公司碳纤维业务的发展状况。 当前,世界上生产两种碳纤维。一种是用聚丙烯腈纤维为原料生产的丙烯腈(PAN)基碳纤维;而另一种是用煤、石油精炼产生的沥青和合成沥青制得沥青基碳纤维。PAN-基碳纤维强度优于沥青基碳纤维,并在世界碳纤维总产量中占压倒多数。因此今天我愿意集中讨论PAN-基碳纤维。1971年,东丽成为世界首家成功地、大规模工业化生产碳纤维的公司,产品称为“Torayca”,是东丽碳纤维的缩写。目前,东丽在世界范围内PAN-基碳纤维的生产及市场领域占领先地位。 1、碳纤维制造工艺 在PAN-基碳纤维生产时,称为母体原丝的聚丙烯纤维,先要由丙烯腈聚合和纺制成丝。然后将这些原丝放入氧化箱中,在200~300℃进行氧化。进而在碳化炉中于1000~2000℃的温度下被碳化成碳纤维。除了常规碳纤维(一般较细),PAN-基碳纤维还包括粗碳纤维,称作“大丝 相似文献
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说起我国的碳纤维发展,有人用"大器晚成"来形容。吉林化纤集团旗下的碳谷公司与长春工业大学通过产、学、研合作,成功开发出低成本、大规模PAN基碳纤维原丝生产技术,打破国外垄断,实现了碳纤维原丝大规模生产技术的国产化,对我国碳纤维事业发展及纺织行业的技术创新与产品升级起到了重要作用。 相似文献
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文章通过某企业活性炭吸附+催化燃烧组合工艺处理工业废气的应用,阐述了活性炭吸附+催化燃烧组合工艺在治理VOCs废气过程中的可靠性和有效性,既提高了处理效率,又实现了污染物超低浓度排放的治理目标。 相似文献
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H2S是有毒环境污染物之一,国内外专家这些年一直致力于硫化氢废气的处理,因此世界上已经许多处理硫化氢废气的方法。本文简要介绍了一些硫化氢气体的特征以硫化氢气体处理的意义,然后笔者着重叙述了目前常用的硫化氢气体废气处理的方法,氧化法、吸收法、活性炭吸附法,最后笔者介绍了目前硫化氢废气处理的前沿技术,生物处理法、生物活性炭法及电化学法。 相似文献
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二恶英——遍布全球的环境污染物 总被引:4,自引:0,他引:4
综述了环境中二恶英及类二恶英的来源、主要特性及污染水平。人类焚烧城市垃圾、医疗废弃物及工业废弃物等固体废物 ,燃烧各种燃料 ,制造和施用含氯农药以及冶金、造纸、化工、饮水消毒等产业都无意识地向环境中排放二恶英及类二恶英。由于它们在环境中极其稳定 ,无论在原野、在大气还是在水域 ,到处都有它们的踪迹。同时 ,由于有着良好的脂溶性 ,它们很容易通过食物链传递而生物累积到动物和人体中。因而 ,人类的二恶英污染是非常普遍且相当严重的 ,它们往往出现在人体的血液、脂肪、肝脏和母乳中 相似文献
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In a recent paper Garnett (2011) examines the greenhouse gas emissions arising from the global food system. This paper builds on Garnett’s contribution by considering how high levels of food waste contribute to the food chain’s greenhouse emissions and how they can be reduced, something Garnett generally overlooks. The emissions that arise from food waste represent the emissions embedded in the production of food that is then wasted and the emissions that arise from the process of waste disposal. Food waste can also be split into pre-consumer and consumer waste. These distinctions give rise to four categories of food waste related emissions: pre-consumer embedded, pre-consumer waste disposal, consumer embedded and consumer waste disposal emissions. The levels of food waste in each category differ between economies, as do the causes of wastage. Policies to address food waste and the associated emissions need to promote a mixture of technological and behavioural change and be tailored to the economic, cultural and technological conditions in each country. 相似文献
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煤炭资源浪费的主要原因及其对策 总被引:3,自引:0,他引:3
煤炭受市场价格体系缺陷与失控,煤的不合理使用、习惯思维方式、不科学的政策导向使原煤加工工艺选择不当等的影响,在开采及其加工过程存在着十分严重的损失与浪费现象.针对存在的问题,提出完善相关煤炭产业政策,调整煤炭价格体系,加强煤炭产品的宏观调控力度,促进资源合理利用,加大煤炭洗选力度,提高煤炭生产与加工科技水平等对策措施.解决煤炭资源浪费问题,实现煤炭经济的可持续发展. 相似文献
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为了有效地控制在火区启封引起的火区复燃,减少人员伤亡,通过煤自燃程序升温试验台,对煤体进行初次氧化升温、绝氧降温封闭处理后二次氧化升温,研究了在二次氧化的过程中CO产生率的变化,并通过对比初次氧化,得出CO的变化规律,为火区启封时保障人身生命的安全提供了理论依据。 相似文献
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综放工作面的煤层自燃是制约安全生产的主要因素。本文针对兴阜煤矿2312综采工作面的实际情况,提出了氮气与发泡剂联合使用的防火技术,介绍了防治自然发火的作用机理。现场实际应用表明,氮气与发泡剂联合防火技术降低了煤炭自燃发火的危险性,具有良好的预防自燃发火效果。 相似文献
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ABSTRACTHospitals are large producers of solid waste, of which some is benign, some is extremely hazardous, and much is in between. The cost of segregating and disposing of products in these waste streams is high, and studies have shown there is considerable potential to reduce these costs while simultaneously decreasing environmental impact. In this article we develop an activity-based costing method that assigns waste disposal costs proportionally to each product. By providing disposal cost information at this level of aggregation it is possible to directly influence purchasing decisions, identify priority products for focused interventions, and determine the ratio of a product's purchasing cost to disposal cost. The method is tested on products with different purchasing costs, disposal costs, physical characteristics, and disposal processes. 相似文献
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The current method for determining the flammable limits for a gas in a closed spherical vessel is based on a specification of the maximum pressure increase during the combustion, usually from 5 to 10% of the initial ambient pressure. This approach is completely arbitrary and is not fundamentally based. For most hydrocarbons this pressure boundary and hence the flammable limits are easy to determine experimentally since an abrupt pressure drop occurs at the flammable limits as the fuel concentration in air is adjusted. However, for some species, particularly hydrogen mixed with air, the drop in maximum combustion pressure is not very abrupt and the fuel concentration can range several percentage points depending on the arbitrary criterion used for the flammable limits. This article will discuss a new approach for determining the flammable limits for a gas in a spherical vessel. The approach is based on the maximum second derivative of pressure rise. The second derivative is indicative of an acceleration of the combustion process and is, hence, fundamentally based. Furthermore, we have identified a new approach to determine the downward propagating flammable limits based on the combustion time, that is, the time that the gas actually burns in the vessel. Experimental data for methane and hydrogen show that the second derivative flammable limit criterion produces slightly conservative values for combustion in air. Visual inspection of the combustion during the tests showed that no visual combustion was observed at the second derivative criterion. For methane, the second derivative criterion resulted in a flammable range in air from 4.6 to 15.8% methane. For hydrogen these limits are 3.6–75.2%. We believe that this method will provide a much more fundamentally based method to determine both the upper and lower flammable limits of upward flame propagation and also provide a means to determine the downward propagation limits in a spherical combustion vessel. © 2009 American Institute of Chemical Engineers Process Saf Prog, 2009 相似文献