粘胶纤维生产废气的综合处理

针对粘胶纤维生产中不同工序产生的含有H2s、CS2的废气特点,分别采用不同方法对废气进行处理,处理后的废气达到国家高空排放标准。介绍了不同方法的废气处理工艺流程和处理效果。     

淀粉行业异味治理工艺及工程实例

采用两种不同工艺对某淀粉加工有限公司淀粉糖生产项目,不同工序产生的异味废气进行处理,其中管束蒸发器烘干废气、玉米破碎和分离废气以及葡萄糖蒸发浓缩废气统一收集后,采用碱洗喷淋技术处理,而黄原胶发酵废气采用阻沫分离-组合生物过滤技术处理。结果表明,经异味处理系统处理后的气体符合《大气污染物综合排放标准》(GB 16297—1996)中二级排放标准。     

关于柔性AMOLED工厂废气的处置概述

AMOLED是近几年发展起来的新型显示技术,本文对某AMOLED企业的废气系统进行调查研究,梳理废气来源、污染物种类及处理方法。其中,酸碱废气采用碱液/酸液洗涤处理,工艺尾气采用POU+碱液洗涤处理,有机废气采用沸石浓缩转轮+RTO焚烧炉处理,污染物排放浓度均达到现行排放标准。结合环保部门对电子工业污染物排放的新要求,得出非甲烷总烃、苯、甲醛、三氯乙烯、磷化氢、甲苯、砷化氢、二甲苯等是今后AMOLED行业废气处理工作研究重点。     

采用冷却结晶法处理硝基氯苯废气

介绍了采用冷却结晶法处理含硝基氯苯废气的工艺方法和原理,通过用水作冷却剂对含硝基氯苯的废气进行冷却、结晶,使废气中的升华物和水蒸气同时被捕集,处理后的废气达到较高的净化程度。     

RCO在丁苯橡胶装置综合异味处理上的应用

某石油化工企业丁苯橡胶装置产生废气异味较大,废气中非甲烷烃超标,影响员工健康及周边环境.该企业通过调研将多种废气处理技术方案进行对比,最终采用三床式RCO技术对丁苯橡胶装置进行综合异味治理;同时,对丁苯橡胶装置前部产生异味的部位进行密闭改造,将异味废气收集后集中输送至新建的RCO进行废气处理,经处理后废气达标排放,实现...     

生物法组合工艺在炼油VOCs废气治理中的应用

为降低废气中挥发性有机物(VOCs)的浓度,对废气处理装置进行了技术优化改造,采用生物法组合工艺处理了VOCs废气中的污染物。实施后,废气中恶臭气体脱除率达到92.5%。     

活性炭吸附脱附工艺在涂料行业的应用

该涂料化工企业主要生产聚氨酯、塑料、橡胶等合成材料以及金属表面涂饰产品,废气主要来自甲类厂房,废气污染物为投料粉尘、非甲烷烃等,对投料粉尘与有机废气分开收集,对粉尘废气先采用脉冲袋式除尘器预处理后与有机废气汇总,再加活性炭吸附蒸汽脱附-冷凝回收工艺进行处理,废气总风量为19000 m~3/h,有机物平均浓度为168 mg/m~3,该套废气处理设备安装调试后处理效果良好,粉尘和非甲烷总烃的排放均达到环保要求。     

RTO装置在焦化废气处理中的应用

采用蓄热式热力氧化器(RTO)对焦化废气进行了处理,并对RTO装置进行了工艺优化。结果表明,经过RTO装置处理的焦化废气达到了国家相关排放要求,有机废气的净化率达到了99%,治理效果较好。     

氨基酸发酵厂废气全过程控制技术与应用

针对氨基酸发酵厂废气产生量大、组成复杂且各工序气体分布不均、污染物特性各异等特点,对氨基酸发酵厂废气进行全过程处理。对发酵、脱色和提取、板框压滤和蛋白烘干废气,分别采用两相生物、酸碱喷淋、洗涤-生物和文丘里-碱洗电除雾-低温等离子组合工艺。重点介绍了各工序废气处理工艺选择和工程设计参数。工程运行结果表明,各工序废气处理系统处理后的废气污染物指标均能达到《大气污染物综合排放标准》(GB 16297—1996)中要求的排放标准。     

玻纤池窑废气处理技术发展

介绍了玻璃纤维池窑废气的来源和危害,废气排放成分和控制标准,窑炉废气的处理方法。对吸收法处理废气中的干法、半干法、湿法工艺进行阐述,并介绍了纯氧池窑废气处理的进展和环境污染的综合治理,提出了一些废气处理的新思路和方法。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。