火力发电行业用水分析及对策

介绍了火力发电厂水资源利用和水务管理情况,比较了国内外的火电厂耗水指标,研究了水资源的开发利用和电厂的节水技术及改进措施等。讨论了电源点建设所面临的环境保护和水资源紧缺的影响,建议把城市污水回用及海水淡化作为火力发电厂项目建设的用水发展方向,根据电源点总体发展和分布,科学制定水资源储备战略。     

火力发电厂节水措施与技术探讨

分析了火电厂的用水和排水产生情况,详细介绍了国内外火力发电厂的节水措施和废水处理技术,提出了火电厂节水新技术,对火电厂的节水工作有一定的指导意义。     

石化企业自备电厂的用水调查

通过对石化企业自备电厂用排水状况的调查,并借鉴电力公司火电厂用水统计方法,提出了石化企业自备发电厂用水单耗的统计方法,针对石化企业电厂用水状况,提出了电厂用排水流程和确实可行的节水措施。     

浅析电厂水务管理

水资源日益珍贵,本文以某电厂为例,通过对电厂水源选择、用水量统计等方面的探讨,着重研究了电厂生产过程中的各类用水和排水、水质水量及处理技术,为电厂水务管理工作提供事实依据,并在此基础上提出可行的节水措施,以达到降低水耗、重复利用、减少排放、合理利用水资源,完善环境保护的最终任务,从而保证电厂长期,安全,稳定,经济运行.     

橡胶工业节水技术管理创新模式探讨

通过节水管理及节水措施,转变节水观念与意识,完善水资源管理制度,强化水资源管理各项基础工作。实施节水技术改造项目,创造了非常可观的节约量,创建成节水型企业。     

石灰深度处理污水厂二级出水与回用工程实例

随着水资源短缺的日益加剧,城市污水深度处理后应用于循环水补充水日益成为电厂解决其生存发展问题的重要途径。对某2×300 MW电厂城市污水回用案例进行介绍,城市污水采用石灰深度处理可以完全达到火电厂循环水补充水的水质要求。石灰深度处理作为火电厂城市污水回用深度处理技术,技术可行,运行可靠。     

火电厂全厂废水梯级利用技术探讨

我国水资源短缺,火电厂作为工业用水和废水排放大户,节约用水、减少废水排放作为电厂主要工作意义重大。本文从废水产生的途径阐述,提出提高废水梯级利用效率的办法,实现零排放,并就其存在的现状进行思考。     

浅谈石化企业节水及水资源综合利用

我国水资源日趋紧张，石化工业又是用水量较大的产业，合理开发利用水资源是关系到石化工业在21世纪可持续发展的一个重要因素。分析了扬子石化公司的用水现状，针对一些问题提出了节水及水资源综合利用的措施。     

火电厂深度节水技术研究进展

综述了循环水高浓缩倍率运行技术、中水深度处理技术和凝结水精处理技术的原理及特点,列举了各处理工艺的成功应用实例,指出其在火电厂节能减排中的优势。提高循环水浓缩倍率是火电厂节水的重要措施;中水回用大大减少了外排水量;凝结水精处理优化技术可进一步改善出水水质。火电厂节水减排是一个系统过程,通过对各技术进行合理的运行及优化,即可达到较为理想的效果。     

湖北化肥深挖节水减排潜力

湖北化肥厂虽然处于长江边缘,水资源非常丰富,但历来重视做好节水减排工作。采取各种措施,深控节水减排潜力。     

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。