催化装置CO余热锅炉节能改造

南阳石蜡精细化工厂根据催化装置有关烟气参数、烟气余热回收状况及改造要求,采用国内成熟、可靠的管道式CO焚烧技术。改造后,催化余热锅炉可多产蒸汽8t／h,催化装置能耗降低418．6MJ／t原料;CO对大气的污染显著降低。     

国内最大的硫磺回收装置开始在大连石化安装

3月17日，中国石油第七建设公司的1000万t塔吊将650t重的27万t／a硫磺回收装置火炬塔架．成功吊装就位于渤海之滨的大连石化公司东部海岸。27万t／a硫磺回收装置目前在国内规模最大，可回收在炼油过程中产生的含硫烟气．使气体排放完全达标。其中关键设备之一的火炬塔架高达140m．超过目前大连石化所有装置的高度。     

沧州炼化催化烟气脱硫脱硝装置开车成功

12月6日,沧州炼化催化烟气顺利并入新建120万t／a烟气脱硫脱硝除尘装置并实现正常运行,标志着该套装置顺利开工成功。经检测,脱后烟气SOz降低到100mg／Nm^3以下,NOx降低到150mg／Nm^3以下,完全满足了国家环保部最严格的石油炼制工业污染物排放标准。     

热管蒸发器用于净化工序前的设计方案

某公司现有1套150kt／a硫铁矿制酸装置，进入净化工序烟气温度达320～330℃，经过动力波洗涤器后烟气温度要冷却至60～70℃，烟气通过水冷不仅要浪费大量的水资源而且未充分利用烟气余热。针对这一情况，该公司委托南通贝思特石墨设备有限公司在净化工序前设计1套热管蒸发器，尽量回收该烟气余热。设计数据为：烟气流量5600ITI。／h，烟气进、出15温度分别为325，230℃，给水温度104℃，饱和蒸汽温度180℃，蒸汽压力0．9MPa，蒸汽产量3t／h。     

陕西延长石油兴化化学烟气脱硫装置建成投产

陕西延长石油集团兴化化学股份有限公司实施的节能及综合利用技术改造项目工程3×170t／h煤粉锅炉烟气脱硫装置日前投入运行，该工程由江苏和亿昌环保工程科技有限公司承建，三台煤粉锅炉合用的一套烟气氨法脱硫和副产品硫酸铵生产装置，脱硫塔采用专利技术“混凝土＋PP”的型式，塔径10．6m，处理烟气量每小时84万m^3，设计脱硫效率95％，     

飞灰重熔技术在130t/h锅炉的应用

介绍了在新建130t／h液态排渣旋风炉上应用飞灰重熔装置，并结合炉内喷钙技术进行烟气脱硫和粉煤灰污染治理情况，通过1a多的稳定运行，锅炉飞灰完全重熔，降低了烟气中SO2浓度，提高了脱硫率，收到明显的经济效益和环境效益。     

高砷硫金矿焙烧烟气中砷的回收

1概述 我公司目前正在为200kt／a高砷硫金矿制酸系统设计一套烟气砷回收装置,As2O3产量为1．56t／h或37．44t／d;产品质量指标为：W（As203）≥95％（干基）,不含H2O、H2SO4及Pb。烟气脱砷后送去制酸。我公司高砷硫金矿成分如表1所示。     

燃煤锅炉烟气脱硫工程总结

0 前言 山东晋煤明水大化集团（以下简称明水大化）现有2台130t／h和1台75t／h燃煤锅炉，根据国家环保政策，需对烟气中的SO2进行治理。烟气脱硫工程经公开招标，采用了宁波远东化工集团有限公司的氨法脱硫工艺，整套装置总投资控制在1300万元以内。     

霍尼韦尔和Intergraph合作为过程自动化和仪器方案制定统一标准

台塑正在进行氯碱装置的扩能改造。2005年6月，高雄23．3万t／a装置扩能13万t／a；2005年8月，麦寮装置增加26．6万t／a产能。扩产后，麦寮烧碱总产能将达到110万t／a。2005年第三季度，台塑100万t／a的二氯乙烷(EDC)装置也将扩建到140万t／a。     

余热锅炉系统技术改造

中石化洛阳分公司140万t／a重油催化裂化装置于2002年更新余热锅炉,改造其配套设施,改造后,提高了装置过热蒸汽的产量,充分利用了再生烟气中剩余的CO,既降低了装置能耗,又改善了环境。     

佛山市顺德新城区降水中污染物的监测和分析

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。     

Metabolism of trideuterated iso-lignoceric acid in rats in Vivo and in human fibroblasts in culture

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.     

高效液相色谱法分析化妆品中微量成分的研究进展

综述了高效液相色谱法在化妆品中防腐剂、防晒剂中紫外线吸收剂以及性激素的检测等几个方面的应用;同时,介绍了分析所用的色谱柱、流动相、使用的检测手段以及样品的提取方法;最后针对目前存在的问题,提出了高效液相色谱用于化妆品中微量成分分析的研究方向和发展前景。     

Denitrification in shallow groundwater in a coastal agricultural area in Japan

In a coastal agricultural area in the central part of Japan (Shizuoka), we found decreasing nitrate concentration with depth in a shallow groundwater, where the depth to water table varied between 0.6 and 1.2 m below ground surface. High nitrate concentrations (5–29 mg N L^–1) were often observed in the upper layer (0–2 m) of the groundwater, but the concentration decreased to less than 1 mg N L^–1 in the deeper layer. Ammonium was scarcely detected, and the concentration of dissolved oxygen was usually low (< 1 mgO₂ L^–1) in the groundwater. Nitrate in the groundwater often had very heavy nitrogen stable isotope ratios (>20{}). There was a negative relationship between nitrogen stable isotope ratio of nitrate and its concentration. When nitrate was injected into the groundwater with acetylene and bromide (a conservative tracer), nitrate concentration decreased to 20% of the initial level within 5 days, accompanied by the increase in nitrite and nitrous oxide concentration and a little change in bromide concentration. These results indicate that microbial denitrification plays a potential role in the decrease of nitrate in shallow groundwater at the study site.     

我国硝酸工业生产技术新进展

系统叙述了我国硝酸工业2000-2007年生产现状及主要技术成果,尤其指出了国产"四合一"机组的成功投运,使我国硝酸国产化装置取得较大的进步,表现在吨酸的铂耗、氨耗和能耗等方面接近国外引进装置水平,同时介绍了国外双加压法硝酸生产技术的进展.我国已成为硝酸生产大国,仍需以先进的技术改造和发展我国硝酸工业,确保我国硝酸工业健康有序地发展,加快从硝酸生产大国向强国迈进的步伐.