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在环境保护工作中,污染源废气检测具有重大意义,要保证污染源废气检测结果的准确度,才能作出科学可行的决策,为环境保护工作的高质量开展提供可靠的信息支持。然而在污染源废气检测过程中暴露出一些问题,导致检测结果不能精准反映出污染源组成成分和浓度,采取的环保措施发挥的效用较低,大气环境质量得不到改善。基于此,加强污染源废气检测全过程、全方位的监控,强化检测工作质量,对环保事业的发展具有积极影响。本文将探讨污染源废气检测技术原理和工作流程,对相关影响因素和常见问题进行分析,并提出有效的优化措施,供参考和借鉴。 相似文献
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研究了固定污染源废气现场监测流程的质量控制路径.首先对固定污染源废气监测的前期准备工作进行论述;其次,分析了固定污染源废气监测的流程;最后,深入探讨了不同固定污染源废气监测质量控制方法.希望通过研究,为今后固定污染源废气现场监测流程质量控制提供一定的帮助. 相似文献
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建立了固体吸附-超声解吸-气相色谱法测定无组织排放监控点空气和固定污染源废气中氯苯类化合物的方法,对该方法的线性、检出限、精密度、回收率进行了分析,同时对实际样品进行测定分析。结果表明:10种氯苯类化合物线性良好,相关系数为0.9989~0.9992,无组织排放监控点空气方法检出限为0.004~0.007mg/m3,固定污染源废气方法检出限为0.02~0.03mg/m3;无组织排放监控点空气和固定污染源废气空白加标样品平均加标回收率分别为100%~110%和97.0%~108%,相对标准偏差分别为3.5%~7.3%和3.4%~6.6%。该方法能够满足无组织排放监控点空气和固定污染源废气中氯苯类化合物的检测要求。 相似文献
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根据《固定污染源废气二氧化硫的测定定电位电解法》(HJ 57-2017)对废气中二氧化硫检测的方法要求,为准确测定烟气中的二氧化硫含量,保证装置废气达标排放及平稳运行,制定检测方案. 相似文献
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化纤布印花企业生产中的大气污染源主要有:固化胶、感光胶涂布废气,制版烘干废气,印花烘干废气,蒸化工艺废气,定型工艺废气,锅炉燃烧废气,发电机尾气以及厨房油烟等。本文主要针对工艺废气污染源进行分析,其中定型机废气具有温度高、湿度大、含油烟和成分复杂等特性,废气透明度差且具有恶臭气味,本文结合工程案例介绍了一种印花工艺废气的治理技术,为化纤布印花企业的工艺废气污染源识别及废气治理提供借鉴。 相似文献
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近年来随着环境问题,尤其是大气污染问题的日益突出,如何有效地对各类环境进行彻底的废气监测,保证环境质量是当下控制环境污染的重要举措。基于此,对环境污染源中废气监测的质量控制进行探究,具体内容包括:首先对环境污染源中废气监测的相关理论及工作进行阐述,其次,针对环境污染源中废气监测的质量控制进行具体的分析,主要有两个方面,一是废气监测中的质量控制要点,二是废气监测中质量控制的具体操作。为今后我国的环保领域中的废气监测和质量控制提供参考与借鉴。 相似文献
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通过对船舶制造业所排放VOCs的风量、浓度与成分等因素的分析,结合江南船厂VOCs治理的实际案例,发现沸石分子筛吸附法与蓄热式氧化燃烧的组合方案既具有经济性又有高去除效率。在钢预处理与室内涂装2条生产线上所产生废气风量分别为20 000 m 3/h与140 000 m 3/h,废气浓度分别为1 500 mg/m 3与300 mg/m 3,符合吸附-燃烧处理范围。治理后的废气中的苯、甲苯、二甲苯以及非甲烷总烃的单项浓度皆在标准限值以内,废气去除效率高达99%,且年节省排污费用2 888.66万元。 相似文献
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This paper proposes that a diesel oxidation catalyst (DOC) operating within the fully turbulent flow regime is an efficient means of reducing the contents of particulate matter in the exhaust gases. The suggested mode of operation is in contrast to the fact that the DOCs are typically operated within the laminar flow regime. In the paper, the particle trapping efficiency and pollutant conversion in turbulent ceramic DOCs are calculated using both mass-transfer correlations available in the literature and computational fluid dynamics (CFD). It is shown that a turbulent DOC substantially increases the removal of small particulates from the exhaust gases. This indicates the potential of the aftertreatment system to comply with the forthcoming number-based emission legislations on particulate matter. In addition, the turbulent DOC can be used to optimize the overall performance of a combined system consisting of a DOC and a diesel particulate filter. 相似文献
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Karlheinz Schaber 《化学,工程师,技术》1995,67(11):1443-1452
Formation of aerosols by spontaneous condensation or desublimation in condensers or absorbers often causes serious problems in industrial processes. The fine aerosol particles, formed under special operating conditions, remain suspended in gases and are carried over into downstream stages or lead to high pollutant concentrations in the exhaust gas. The present paper describe under what conditions aerosols are formed. The characteristic behaviour of aerosols is discussed with the aid of experiments and computer simulation. 相似文献
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氰化氢(HCN)是一种危害人体健康和大气环境的剧毒污染物,任何含氮物质和含氮燃料的燃烧、化工生产、冶金、汽车尾气排放等都能释放含HCN的废气。本文综述了近年来脱除HCN方面的研究进展,评述了各种脱氰方法包括吸收、吸附、燃烧、催化氧化、催化水解等技术的原理、适用对象及各种方法的优缺点。结果表明:吸收和燃烧法具有净化效率高、工艺简单等优点,对处理高浓度含氰废气有较大优势;其它方法的脱氰剂虽起活温度高、再生较为困难,但二次污染小,适用于气体的精细脱氰。今后各种技术的联合应用不仅能实现复杂气分下工业废气中HCN的逐级净化,而且能综合回收利用尾气中高浓度CO作为燃料和化工原料气。虽然各技术的联合应用在投资成本和工艺控制方面还有一定难度,但却具有较大的发展前景,是今后含氰化氢废气脱除的新趋势。 相似文献
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以两段法等制作的普通煤气及化工、冶金企业中含可燃组分的废气等,都是低热值燃料。它们的高效燃烧和废热回收,需借助高活性催化剂支持的CST燃烧法以提高热效、降低空气污染,因而颇具实用价值。研制活性组分和优质载体是关键因素,要求前者有好的活化氧的能力,后者则比表面大且稳定。该技术用于热交换器,亦是节能领域一新举。 相似文献
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Aerosols and Their Technical Significance Aerosols occur in many technical processes. For example, aerosols are formed to generate products of highly disperse solids in gas phase processes. Particle formation and growth in the aerosol state decisively determine the product properties by the size, shape, and structure of the particles. Undesired aerosol formation can also occur in technical processes. These undesired aerosols pollut process gases or products or increase the pollutant content of exhaust gases. If undesired aerosol formation cannot be avoided, efficient separation techniques have to be used. Efficient separators are also required to recover fine product particles from the gas phase. Moreover, aerosols, whether desired or undesired, have to be measured and characterized. This requires high performing measuring techniques. The paper outlines the technical significance of aerosols. 相似文献
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针对抚顺西露天矿引发的环境污染问题,应用调查、监测、评价、分析的方法,对该矿坑采场内和周边空气环境质量现状进行研究,重点阐述了西露天矿采场内的主要污染源排放状况以及评价区内的环境质量状况;采用等标污染负荷法、综合污染指数法、污染负荷系数法、综合分析和对比分析等方法对评价区内的常规污染物和有机污染物监测结果分别进行评价,最后剖析了污染物超标的主要原因.针对污染情况提出了相府的措旅及律议. 相似文献
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A spark ignition engine was used to study the impact of fuel composition and of the air/fuel equivalence ratio on exhaust emissions of specific hydrocarbons. The fuel blends used contained eight main hydrocarbons and four oxygenated compounds. The identification of each exhaust pollutant fuel precursor is already done. After this identification, several models correlating the exhaust concentration of these pollutants with the fuel composition are presented on each air/fuel equivalence ratio. Based on the above findings, the main formation paths for the formation of each exhaust pollutant are proposed. 相似文献
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2013年石家庄市空气质量情况及污染成因分析 总被引:1,自引:0,他引:1
文章对2013年石家庄市7个自动监测点的环境空气质量的检测数据进行了分析,得出石家庄市首要污染物为细颗粒物和可吸入颗粒物.二氧化硫、二氧化氮、细颗粒物和可吸入颗粒物的变化趋势是冬季高,春夏秋低.燃煤、机动车尾气、建筑扬尘是石家庄市大气污染的三大污染源,大气污染防治必须严抓二氧化硫、二氧化氮、细颗粒物和可吸入颗粒物这四类污染物,不断减少污染物的排放. 相似文献
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Jaroslaw Krzywanski 《Fuel Processing Technology》2010,91(3):290-295
The paper is focused on the idea of large-scale CFB boiler operation with oxygen/CO2-modified atmosphere inside combustion chamber. The following main advantages can be found for this technology: reduction of pollutant emissions, possibility of high efficiency separation of CO2 from the exhaust gases that results from increased CO2 concentration, lower chimney loss due to the reduction of flue gases in a volume, limitation of the combustion chamber dimensions etc. The paper presents a model of coal combustion in oxygen-enriched CFB environment, where air staging, desulfurization process, NOx formation and reduction as well as a stationary dense phase of coarse particles in the bottom part of combustion chamber and a circulating dilute phase in the upper part are included. 相似文献