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随着生态环境部对企业在线监测系统检查日趋严格,水泥窑窑尾污染物控制变得尤为重要,尤其是对氮氧化物、二氧化硫的控制。为消除过量喷氨导致氨盐结晶,避免二氧化硫数据失真,部分企业在前端增加了预处理系统,预处理系统能否正常运行,决定了二氧化硫排放数据是否真实有效。本文通过二氧化硫数据异常问题分析原因,为企业CEMS故障处理提供经验。 相似文献
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在同样的环境下使用便携式紫外吸收法和定电位电解法同时测定污染源废气中二氧化硫和氮氧化物,分析两者监测比对结果,初步研究两种方法产生误差的原因。结果发现:二氧化硫和氮氧化物标准气体的两种监测方法验证结果的误差均不大于0.5%,符合标准限值要求,固定污染源中二氧化硫和氮氧物两种方法的实验结果存在一定的误差,以二氧化硫误差较为明显;受烟气高湿度的影响,紫外吸收法对二氧化硫和氮氧化物监测结果均大于定电位电解法的监测结果;对使用静电式除尘装置废气中二氧化硫和氮氧化物两种方法的监测结果产生误差值为最高。 相似文献
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介绍了大蓄热量转化器的设计及应用。转化器内衬和球拱均采用耐火砖砌筑,以提高转化器的蓄热能力。生产实践表明,大蓄热量转化器对二氧化硫含量低及二氧化硫含量波动大的烟气有很好的适应性,保证了 二氧化硫含量烟气两转两吸实现自热平衡。 相似文献
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介绍利用喷杯吸收塔吸收二氧化硫的尾吸装置的工艺流程、设备结构及操作规程。装置投运后,二氧化硫吸收率达84%,尾气二氧化硫平均排放浓度333mg/m^3,平均排放速率3.86kg/h,运行阻力400—400Pa,运行费用每吨酸约2.0元,彻底解决了尾气二氧化硫超标排放问题。 相似文献
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Solid solutions of diphosphates of zinc and copper and of zinc and cobalt were synthesized from mixtures of pure diphosphates at temperatures up to 1000°C. Their X-ray diffractometry patterns varied continuously from one end member to the other. Solid solutions of orthophosphates of composition Zn3−x Cox(PO4 )2, with x = 0.4–1.6, were formed at temperatures up to 950°C; all exhibited the structure of γ-Zn3 (PO4 )2. Solid solutions of orthophosphates of composition Zn3−x Cux (PO4 )2 exhibited more-complex behavior. At 1000°C and copper contents of 20–80 mol%, a phase that is related to Cu3 (PO4 )2, termed here the "ε-phase," predominated. At 850°–950°C and in the region from 20 mol% to ∼33 mol% of copper, the solid solutions (the "η-phase") adopted the structure of graftonite. At 800°–900°C and 10–15 mol% of copper, the solid solutions exhibited a new structure (the "δ-phase"), which we found to be related to the mineral sarcopside. At temperatures 950°C, the solutions that contained 5–15 mol% of copper (the "β-phase") had the structure of β-Zn3 (PO4 )2, whereas at 800°–850°C, solutions with 5 mol% of copper (the "-phase") exhibited the structure of γ-Zn3 (PO4 )2. Attempts to synthesize Cu+ ZnPO4 and Cu+ Cu2+ Zn3 (PO4 )3 were unsuccessful. 相似文献
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为了提高油田的生产效率,设计最佳的油气集输处理的工艺流程,更好地完成油气水分离处理的任务。对油气集输工艺技术进行优化,发挥高效油气水分离处理设备的优势,提高油气水处理的质量,保证油气集输工艺顺利实施,获得最佳的油田产量外输。 相似文献
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建设创新型国家是我们中华民族的历史责任。“自主创新、重点突破、支撑发展、引领未来”的16字方针应当成为我们未来创新活动的指南。建设创新型国家把自主创新放在首位,并提出了引领未来的高标准要求。钢铁科技创新必须突出重点,抓住创新成果产业化这个关键,支撑起行业和国民经济的发展。 相似文献
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相比已经完善丰富的开采和勘探技术,油气的运输以及储存却仍然存在不足之处。我国对能源安全提出更加严格要求的同时,对区域经济的发展规划也有足够重视。因此,保障油气管道的安全则成为了我国能源安全战略的重中之重。在阐释油气管道现阶段在储运安全保障技术发展状况的基础上,分析了现存的问题及解决问题的手段,并指出未来可能使用的目标策略,为今后研究者提供一定程度上的借鉴经验。 相似文献
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膜的污染和劣化及其防治对策 总被引:25,自引:0,他引:25
较为系统地介绍了膜污染和劣化的定义和特点,因膜污染和劣化而造成的膜性能变化,以及如何预防、减少或清除膜污染和劣化的一些通用方法。 相似文献
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James L. White David G. Salladay David O. Quisenberry Donald L. MacLean 《应用聚合物科学杂志》1972,16(11):2811-2827
Gel permeation chromatographic (GPC) and thin-layer chromatographic (TLC) studies of polystyrene, polybutadienes (BR), and their copolymers (SBR) have been carried out. GPC primarily separates them on the basis of molecular size, and TLC, on the basis of composition. Methods of obtaining absolute molecular weight distributions for BR and SBR based upon variations of the Strasbourg Universal Calibration procedure are described. In particular, [η]–M relationships in both the GPC solvent (THF) and in a second solvent (toluene) were used; in addition, results of statistical mechanical calculations for \documentclass{article}\pagestyle{empty}\begin{document}$\overline {s^2 }$\end{document} (based on the assumption of negligible steric hindrance and freely rotating bonds) were applied. An experimental comparison of these methods was carried out, and use of the [η]–M relationships for both solvents was found to give satisfactory results. The predictions of the statistical theory were too low. A detailed study of polymer–solvent–gel interaction in the GPC unit was made through investigation of ternary phase equilibrium in the (polystyrene)–THF–(polymer) system. The polymers studied included BR and SBR with varying styrene contents. Experimental techniques for TLC separations of BR, SBR, and polystyrene according to the composition are described. 相似文献