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兖矿鲁南化肥厂28000m^3/h空分装置属双泵内压缩空分流程,其原动机为汽轮机,拖动原料空压机和空气增压机,于2008年6月29日建成投产。空分装置自建成投产以来,空气增压机(型号为RBZ45-7)主止推轴承温度一直居高不下,最高达到106℃,严重威胁着系统的安全稳定运行。为此, 相似文献
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中国神华煤制油公司煤制油厂的引进林德公司的一套5万m^3/h空分装置,在运行中膨胀机两次发生故障,通过优化工艺操作,使装置维持较高的负荷运行,并生产一定量的液体,为空分装置的安稳长期运行奠定了基础。 相似文献
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目前大型空分装置原料空气的净化均采用分子筛吸附流程。其特点是:流程简单、操作方便、投资较少以及开车时间短。我公司二甲醚厂的25000m^3/h空分装置的原料空气净化采用的就是这种流程,空分装置于2008年9月2日试车投产。以下对该套装置的分子筛系统运行情况做一分析总结。 相似文献
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中国神华煤制油公司煤制油厂的引进林德公司的一套5万m^3/h空分装置,在运行中膨胀机两次发生故障,通过优化工艺操作,使装置维持较高的负荷运行,并生产一定量的液体,为空分装置的安稳长运行奠定了基础。 相似文献
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1概述我公司原有4套空分装置:建厂初期的5000m3/h空分装置,已运行40多年,工艺落后,能耗较高;1986年二期扩建时建设的全低压外压缩6000m3/h空分装置,由于生产任务重,不能按期进行维护、检修,设备已出现不同程度的疲劳现象;2000年公司进行“1830”技改工程,配套新建的1套全低压、分子筛净化节能流程6000m3/h空分装置,目前运行平稳,是生产线上的主力;2005年购置的1套国内二手KDON3800/3800型空分装置,虽然能达到设计工况,但工艺落后、设备能力不匹配、装置能耗高。 相似文献
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新型节水装置--闭式空冷循环冷却水系统的工业应用 总被引:2,自引:0,他引:2
根据传统的工业循环冷却水系统存在的水蒸发量大、出水温度不稳定、水质逐步恶化、排污量大、电耗高、维护费用高等现状,研究开发了一种新型节水装置——闭式空冷循环冷却水系统。介绍了该装置的冷却原理、工艺流程和主要设备。工业应用表明,该装置具有冷却水温度稳定、可提高工艺换热设备传热效率和使用寿命、节省电耗、排污量小、设备占地面小、维护简单、运转费用低等特点。经济效益测算表明,以水费2元/m^3、电费0.5元/kw·h计,使用寿命10年,该装置产生的直接经济效益为4230万元。 相似文献
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山西丰喜肥业集团临猗分公司2005年12月新建1套KDON-14000/1500型全低压大型空分装置。该空分装置采用了全低压、透平膨胀、氮水预冷、分子筛吸附、内压缩(液氧泵)工艺流程。空压机和增压机为“一拖二”形式,即由1台双出轴汽轮机分别驱动空压机和增压机。空分装置设计规模为14000m^3/h(最大14700m^3/h,标态)产氧装置,氧气纯度为99.6%(体积分数), 相似文献
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0 前言
安徽临泉化工股份有限公司2#合成氨系统脱碳装置采用碳酸丙烯酯(碳丙)吸收工艺,压力3.0MPa,并联运行2台脱碳塔(1台φ200mm,1台观600mm,均为填料塔),塔内气液相进口均有分布盘。夏季运行3台450m^3/h多级脱碳泵,冬季运行2台450m^3/h和1台280m^3/h脱碳泵,两塔的气量分别为75000m^3/h(标态)和46000m^3/h(标态), 相似文献
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为掌握佛山市顺德新城区降水中污染物的情况,2015年7月至8月,文章作者分别在雨天进行了降水取样,对降水中的pH、电导率、常见阴离子(F-、Cl~-、NO_3~(2-)、SO_4~(2-))及部分重金属(铅和镉)进行监测分析。选择有相关数据的珠江三角洲和石家庄、厦门等地的降水中污染物的情况进行对比。结果表明,顺德新城区降水中的p H和部分阴离子浓度优于珠江三角洲平均值,酸雨类型属于硫酸和硝酸混合型;其水体洁净程度略差于石家庄;铅和镉的浓度也高于厦门,甚至部分超出了人体能直接接触的安全范围。 相似文献
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Saturated very long chain fatty acids (fatty acids with greater than 22 carbon atoms; VLCFA) accumulate in peroxisomal disorders,
but there is little information on their turnover in patients. To determine the suitability of using stable isotope-labeled
VLCFA in patients with these disorders, the metabolism of 22-methyl[23,23,23-2H3]tricosanoic (iso-lignoceric) acid was studied in rats in vivo and in human skin fibroblasts in culture. The deuterated iso-VLCFA was degraded to the corresponding 16- and 18-carbon iso-fatty acids by rats in vivo and by normal human skin fibroblasts in culture, but there was little or no degradation in peroxisome-deficient (Zellweger’s
syndrome) fibroblasts, indicating that its oxidation was peroxisomal. Neither the 14-, 20-, and 22-carbon iso-fatty acids nor the corresponding odd-chain metabolites could be detected. In the rat, the organ containing most of the iso-lignoceric acid, and its breakdown products, was the liver, whereas negligible amounts were detected in the brain, suggesting
that little of the fatty acid crossed the blood-brain barrier. Our data indicate that VLCFA labeled with deuterium at the
ω-position of the carbon chain are suitable derivatives for the in vivo investigation of patients with defects in peroxisomal β-oxidation because they are metabolized by the same pathways as the
corresponding n-VLCFA. Moreover, as iso-VLCFA and their β-oxidation products are readily separated from the corresponding n-fatty acids by normal chromatographic procedures, the turnover of VLCFA can be more precisely measured.
A preliminary report of part of this work (Reference 18) was presented at the 5th International Symposium on the Synthesis
and Applications of Isotopes and Isotopically Labelled Compounds, Strasbourg, France, June 20–24, 1994. 相似文献
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The proportions of the different lecithin fractions have been determined in HeLa and KB tissue culture cells and Ehrlich Ascites
tumor. 82.8% of the total phosphatidyl choline phosphorus is found in fraction 3 of HeLa cells. The major phosphatidyl cholines
found in KB cells and Ehrlich Ascites tumor are in fractions 3 and 4 and representing 66.6% and 88.7% of the total phosphatidyl
choline P, respectively. The incorporation of 1,2-14C-choline and 1,2-14C-ethanolamine into the various phosphatidyl choline fractions has been assayed to determine their biosynthesis in Ehrlich
Ascites tumor. The incorporation of 1,2-14C-choline into fractions 3 and 4 is 100 times the 1,2-14C-ethanolamine. This evidence indicates that the methylation pathway of phosphatidyl choline synthesis is very low in HeLa,
KB and Ehrlich Ascites cells.
One of 13 papers presented at the symposium “Lipid Metabolism in Cells in Culture,” AOCS Meeting, Houston, May 1971.
Part of a thesis submitted to the Graduate School of the University of North Dakota in partial fulfillment of the Degree of
Master of Science. 相似文献