新环保形势下有机废气VOC治理新技术分析

概述了VOC废气对人体和环境的危害,对新环保形势下的有机废气VOC治理新技术展开探究,分析VOC废气治理技术的发展方向,主要介绍了微生物技术、光催化技术、提取分离技术以及低温等离子技术。根据具体的治理项目展开研究,分析有机废气VOC治理技术在有机废气治理中的实际应用。     

VOC废气治理工程技术方案研究

近年来,我国工业发展在国民经济中占据越来越重要的地位,但是在其发展过程中产生了VOC废气,这种挥发性的毒害废气不仅对环境产生污染,对人们的身体健康也造成威胁。因此,人们对VOC废气治理的关注度越来越高。针对VOC废气治理工程进行研究探讨,并提出VOC废气治理工程技术的发展方向,为工业领域VOC废气治理提供参考。     

储运油泥处理过程中VOC处置技术研究

在处理成品油油泥时会产生大量的挥发性有机物(VOC),该VOC基本C1～C8之间烃类油蒸气,对人及周围环境的影响很大。从吸收率和成本等方面综合比较了吸附法和吸收法VOC处置技术的优缺点,得出活性炭吸附法是一种成本较低,效率高,处置效果好的废气处理工艺,并且满足有机废气处置后尾气排放要求。     

汽车涂装车间VOC废气末端治理方案研究和应用

对汽车涂装VOC废气来源、治理方案进行了介绍,对VOC废气治理效果进行了测算,为汽车涂装车间VOC废气排放治理方案提供了分析建议。     

VOC废气治理工程的优化技术方案

近年来,工业产业迅速发展,工业经济在国民经济中的地位愈加重要。工业发展时产生的VOC废气,不仅造成了大气污染,还给人们的身心健康带来不利影响。基于此,介绍VOC废气治理的常见技术,结合VOC废气治理的工程实例,说明VOC废气治理的技术发展方向,设计VOC废气治理的优化方案。     

涂装车间VOC处理工艺简介

通过解读现行挥发性有机物(VOC)排放标准,结合涂装废气特点及各项数据,分析了现有有机废气处理技术,确认了汽车涂装最适宜的VOC处理工艺。     

对VOC废气处理技术的相关探讨

文章首先对VOC以及其危害进行分析,然后介绍现阶段我国对VOC废气的几种处理技术,希望能够为有关人员提供参考。     

浅谈某电动汽车涂装线VOC废气处理

介绍了某电动汽车涂装线VOC的来源、风量及浓度,根据VOC废气特点选择"沸石浓缩转轮+RTO系统"进行处理,最终使废气达标排放。     

浅谈化工行业VOC废气综合治理的有效措施

目前中国经济快速发展,其关键是由于工业的发展迅速。尽管工业带来了很高的经济收益,但伴随着也带来了严重的环境污染问题。化工行业产生的VOC废气假设治理不当,就会造成严重的环境污染,威胁到人体健康。基于此,本文主要研究了当前化工行业VOC废气综合治理措施,比如生物治理措施、回收技术、销毁技术、冷凝治理方式等,并且其研究结果表明尽管VOC废气综合治理措施是各种各样的,效果不尽相同,但是并不完整,仍需要采取其他治理举措进行结合使用,方可确保化工企业VOC废气得到有效治理。     

RTO和VAR焚烧炉在某制药企业废气治理中的应用

文章阐述了化学制药企业面临的废气VOC整治压力,介绍了RTO蓄热焚烧炉和VAR直燃炉的工作原理、适用范围,以及化学制药企业VOC废气种类,提出RTO和VAR焚烧炉组合应用治理化学制药各过程废气的可行性,并对某化学制药企业RTO焚烧炉和VAR焚烧炉的运行效率、运行参数、运行费用进行了分析总结,证实了RTO和VAR的组合可以成功实施,彻底解决制药企业废气问题。     

测定水性涂料中VOC的几点建议

不同标准和测试方法会引起VOC值的差异 ,针对水性涂料的特点 ,对影响VOC测定的因素作了试验 ,提出测试步骤和合理方法 ,并统一计算方法 ,消除这些差异     

欧洲装饰涂料市场对VOC限制及对策分析

欧洲装饰涂料的零售商有 15万家 ,水性涂料的市场份额为 70 %。按目前欧洲现有涂料产品的水平 ,每年VOC释放量约为 5 8万t。介绍装饰涂料的VOC水平 ,并对如何降低和认识VOC提出了建议。     

水性涂料VOG的气相色谱-质谱检测前处理方法研究

对水性涂料挥发性有机化合物（VOC）检测的前处理方法进行了研究.分别采用搅拌萃取法和超声波萃取法对水性涂料中28种VOC进行提取,采用离心方法提取清液,采用气相色谱-质谱法测定并计算回收率.通过比较,确定以二氯甲烷为萃取溶剂、搅拌时间为40 min的搅拌萃取法提取效率更高,采用该方法对28种VOC的加标回收率在94％～116％之间.     

高固低粘涂料工艺研究及应用实施

目前通用工程机械涂料中,环氧树脂涂料配套聚氨酯涂料是主流产品,多为溶剂型涂料,施工 VOC大多在 500~600 g/L,环境污染严重,减少 VOC排放成为市场和环境治理的迫切需求。与粉末涂料、高固体分等其他低 VOC环保涂料相比,高固低黏涂料工艺更易实施。高固低黏涂料施工 VOC一般在 300~400 g/L。文中通过对高固低黏涂料性能质量、现场工艺可行性、施工成本及环保性等方面验证分析,与在用普通溶剂型涂料对比。结果表明：高固低黏涂料综合性能优异,能够满足工程机械行业当前绿色环保涂装要求,可以在工程机械行业推广应用。     

水性涂料VOC含量测定中水分含量测量方法对比

归纳了水性涂料VOC含量的限量值,讨论了水性涂料VOC含量的测定方法,对VOC含量测定中测水分含量的两种测定方法——卡尔·费休法和气相色谱法的精密度和准确度进行了考察。试验表明,卡尔·费休法的精密度和准确度不及后者。     

A Genetically-Based Latitudinal Cline in the Emission of Herbivore-Induced Plant Volatile Organic Compounds

The existence of predictable latitudinal variation in plant defense against herbivores remains controversial. A prevailing view holds that higher levels of plant defense evolve at low latitudes compared to high latitudes as an adaptive plant response to higher herbivore pressure on low-latitude plants. To date, this prediction has not been examined with respect to volatile organic compounds (VOCs) that many plants emit, often thus attracting the natural enemies of herbivores. Here, we compared genetically-based constitutive and herbivore-induced aboveground vegetative VOC emissions from plants originating across a gradient of more than 10° of latitude (>1,500 km). We collected headspace VOCs from Asclepias syriaca (common milkweed) originating from 20 populations across its natural range and grown in a common garden near the range center. Feeding by specialist Danaus plexippus (monarch) larvae induced VOCs, and field environmental conditions (temperature, light, and humidity) also influenced emissions. Monarch damage increased plant VOC concentrations and altered VOC blends. We found that genetically-based induced VOC emissions varied with the latitude of plant population origin, although the pattern followed the reverse of that predicted—induced VOC concentration increased with increasing latitude. This pattern appeared to be driven by a greater induction of sesquiterpenoids at higher latitudes. In contrast, constitutive VOC emission did not vary systematically with latitude, and the induction of green leafy volatiles declined with latitude. Our results do not support the prevailing view that plant defense is greater at lower than at higher latitudes. That the pattern holds only for herbivore-induced VOC emission, and not constitutive emission, suggests that latitudinal variation in VOCs is not a simple adaptive response to climatic factors.     

乳胶漆气味和VOC的探讨与研究

讨论了乳胶漆气味、VOC以及健康环保间的关系,并研究了乳胶漆中气味的来源以及消除VOC和气味的方法。     

Development of a test method using a VOC analyzer to measure VOC emission from adhesives for building materials

A volatile organic compound (VOC) analyzer is a portable device to measure the four main aromatic hydrocarbon gases: toluene, ethylbenzene, xylene and styrene. With the VOC analyzer, a semiconductor gas sensor eliminates the need for the carrier gas which is required for conventional gas chromatography. In addition, since the semiconductor gas sensor is supersensitive to gas components, it is not necessary to use a conventional gas concentrator or other complicated equipment. Compared with other measurement methods, the VOC analyzer is useful for measuring toluene, ethylbenzene, xylene and styrene in new buildings because of its ease in obtaining field results and repeating the test. For easy, fast and economic testing of total (TVOC) emission from adhesives used for building materials, we developed a test method using the VOC analyzer and compared its measurement of VOC emissions from building materials such as adhesives, paints and wood-based panels with that of the 20-l chamber method, which is the standardized test method in Korea. There was a good correlation between the TVOC emission concentrations determined by the VOC analyzer and the TVOC emission factor (EF) by the 20-l chamber. Based on this good correlation, the VOC analyzer is expected to gain widespread use in the manufacturing field application where a quick and easy test for VOC emission from adhesives for building materials is required. Furthermore, the VOC analyzer offers the potential to become an easier, faster and more economical technique than the currently used standard methods.     

Vapour permeation of VOC emitted from petroleum activities: Application for low concentrations

This study deals with the application of vapour permeation on the abatement of air polluted with VOC, from low to medium concentrations. Toluene, butadiene and propylene were chosen as model compounds. On a first part of the study, the permeation of single VOC, binary and ternary VOC/air mixtures was performed at different flow rates and VOC concentrations. The permeate flux, permeance, enrichment factor, separation efficiency and the recovery were determined. The experimental results were compared to those obtained with a mathematical model, allowing the calculation of the membrane area required to eliminate 95% of the feed VOC content.     

Life cycle assessment for painting processes: putting the VOC issue in perspective

It is increasingly apparent that VOC emission reductions from coating processes have to be seen in a broader context. Firstly there is the balance between formulation, performance and cost. Secondly the issue of environmental trade-offs which accompany reductions in the VOC content of a paint formulation. Some early results from a life cycle assessment study on car painting are presented — these consider a range of environmental impacts associated with water based base coats and compare the profile of solvent based paint with end of pipe controls for VOC. Energy considerations play a major role in the analysis — it emerges that the two paint systems are environmentally similar; neither has an all round better performance across the environmental criteria. Particularly interesting is to compare the total ozone creating potential in each case — ozone being the driver for VOC controls. The results suggest both systems offer an example of ‘best available techniques’ for car painting.