高海拔地区超超临界锅炉的柠檬酸清洗

介绍了国家电投黄河公司西宁火电厂660 MW超超临界基建机组的化学清洗情况。该机组采用双氧水碱洗及柠檬酸清洗加双氧水钝化工艺,得到了优良的清洗及钝化效果。结合该机组的化学清洗过程,对高海拔地区超超临界机组的柠檬酸清洗范围、清洗工艺、控制参数及清洗效果进行介绍,并分析和探讨清洗过程中应注意的事项,进行总结,以此为同类型、同地区的超超临界锅炉的化学清洗提供借鉴。     

循环流化床锅炉两种化学清洗工艺比较

国华宁东电厂2×330MW循环流化床机组锅炉化学清洗均采用盐酸酸洗、柠檬酸漂洗、双氧水钝化工艺,不同之处在于其清洗工艺临时系统的设计.本文通过对这两台机组清洗工艺进行比较,为以后该类型锅炉酸洗临时系统的设计提供一定的参考.     

国华宁东电厂2×330MW亚临界煤矸石机组热力系统化学清洗

本文针对国华宁东330MW亚临界煤矸石机组的特点,制定化学清洗方案,对炉前系统进行A5高效除油剂除油碱洗和炉本体系统采用盐酸清洗,柠檬酸漂洗和双氧水钝化的工艺。清洗结果表明,国华宁东的化学清洗系统、工艺都是合理的,清洗质量优良。     

350 MW超临界直流炉的化学清洗

介绍新疆某电厂2号机组的化学清洗工艺,化学清洗采用双氧水碱洗、柠檬酸酸洗、漂洗及双氧水钝化工艺,酸洗后各项指标均符合要求,清洗效果良好。     

柠檬酸漂洗双氧水钝化在运行炉除铜清洗中的应用

采用盐酸清洗硫脲先除铜,柠檬酸漂洗,碱性双氧水再除铜及钝化工艺,对锅炉本体受热面进行化学清洗,清除水冷壁中的沉积垢及铜垢,解决了炉水中磷酸盐消失现象,清洗和钝化效果良好.     

超临界基建直流炉EDTA铵盐高温清洗

介绍陕西神华富平热电新建工程2×350 MW超临界直流炉基建机组化学清洗,采用双氧水碱洗除油及EDTA铵盐高温清洗工艺,清洗及钝化效果良好。结合该机组的化学清洗过程,对超临界基建机组EDTA铵盐高温清洗范围、清洗工艺、过程控制参数及清洗、钝化效果进行分析,提出清洗过程中应注意事项,为同类型超临界基建机组的化学清洗提供借鉴。     

空冷器系统不停车清洗技术的应用

本文介绍了在不停车化学清洗空冷器系统的过程中,选用的清洗方法、清洗药剂及应用特点,阐述了合理的选用清洗方法及清洗药剂,以提高化学清洗工艺及经济效益的主要控制措施,达到改进清洗工艺的目的。     

2万t／a双氧水装置的化学清洗和钝化

通过对中原化肥厂双氧水装置化学清洗,钝化情况的总结,找出了双氧水装置清洗、钝化的理想配方。     

双氧水装置的化学清洗技术

对福州一化化学品有限公司双氧水装置新、旧系统投产前的清洗实例表明,该法对蒽醌法生产过氧化氢的装置进行清洗,可满足双氧水生产的要求。介绍了双氧水的生产流程、清洗原理和工艺。     

化学清洗钝化在火力发电厂应用的探究

介绍了火力发电厂热力设备化学清洗和钝化技术,研究了不同清洗和钝化工艺的特点及应用,对火力发电厂清洗钝化工艺的发展进行了预测,得出双氧水钝化剂将为更多的火力发电厂所用的结论。     

大港发电厂技改工程锅炉化学清洗

大港发电厂技改工程安装两台强制循环汽包锅炉,机组启动前进行了化学清洗。清洗工艺为盐酸酸洗、柠檬酸漂洗、双氧水钝化。清洗完成后的检查表明,该清洗工艺非常成功,钝化效果完全达到了亚硝酸钠钝化的水平。     

双氧水装置停产后系统置换清洗

双氧水装置是一个易燃、易爆、有毒和腐蚀性介质较多的生产设施,为了确保双氧水生产装置停产后,系统内无工作液及芳烃等易燃、有毒、有害物质,具备拆除装置的安全、环保条件,制订停产清洗置换方案。     

电厂锅炉复合有机酸化学清洗探析

根据某电厂运行锅炉的特点和对其管样进行的小型清洗试验结果,确定了本次化学清洗工艺为复合有机酸酸洗,柠檬酸漂洗,双氧水钝化。复合酸质量分数：4％～6％,柠檬酸质量分数：0．2％～0．5％,双氧水质量分数：0．1％--0．2％。化学清洗结束后,汽包、水冷壁管均已清洗干净;根据清洗管样和腐蚀指示片的测定结果,除垢率为98．1％,腐蚀速率为1．01g/（m2·h）,腐蚀总量为16．2g／m2,各项指标均达到了《火力发电厂锅炉化学清洗导则》（DIMT794—2001）中规定的优良标准。金属表面形成完整的、呈均匀深灰色的钝化膜。     

Cleaning efficiency and impact on production fluxes of oxidising disinfectants on a pes ultrafiltration membrane fouled with proteins

The cleaning step in the ultrafiltration of skim milk is not always complete before the following disinfection start, raising concerns about the effect of disinfectants on any protein remaining. For a Koch polyethersulfone (PES) UF membrane [model HFK131], the fouling in skim milk UF is exclusively due to proteins. Used in right quantity, hypochlorite well finishes the cleaning and can also be used alone as a cleaner [removing 95% of the proteinaceous fouling]. However, if the amount of hypochlorite is not sufficient to end the cleaning, this can lead to large reductions production flux [a 13% decrease on skim milk flux was observed]. Other oxidants such as PVP-iodine, hydrogen peroxide, peracetic acid and sodium perborate do not achieve hydraulic cleanliness [90% of flux recovery]. Oxidants based on hydrogen peroxide and PVP-iodine, when used on a membrane which was still fouled by protein, yielded flux recovery worse than for a single rinsing.     

Dyeing in catalase-treated bleaching baths

The conventional rinsing after bleaching to remove the residual hydrogen peroxide, harmful to the reactive colorants, was replaced by enzymatic cleaning using catalases. The catalase-treated bleaching liquor was reused for dyeing. Though no hydrogen peroxide was detected after the enzymatic process, the bleaching bath composition caused unacceptable colour changes on dyed fabrics. By varying the parameters of the dyeing process – dye, salt, alkali and enzyme concentrations – the colour difference could be reduced significantly and a good dyeing result could be achieved.     

Combination of Surfactant Action with Peroxide Activation for Room-Temperature Cleaning of Textiles

Room-temperature cleaning of textiles is commonly practiced in many countries for energy saving as well as custom in daily life, but not very effective for removing colored contaminants. In this work, it was proposed to combine surfactant action (SA) with peroxide activation (PA) in a peroxide activator to enable cleaning of textiles at room temperature. N-[4-(alkyldimethylammoniomethyl)benzoyl]lactam chloride was designed and synthesized as a prototype of the proposed peroxide activator, in which the alkyl chain with a carbon atom number of n was responsible for surfactant action and the N-benzoyllactam with a carbon atom number of m in the lactam ring was responsible for peroxide activation. Such a peroxide activator was hereby referred to as SAPA_m-n. The room-temperature cleaning performance of SAPA_m-n was examined by cotton fabrics contaminated with morin and waste engine oil, respectively. It was found that SAPA_m-n was able to activate hydrogen peroxide released from sodium perborate so as to effectively bleach the morin-contaminated cotton fabric at room temperature. Though extending the alkyl chain length of SAPA_m-n resulted in no apparent effect on the room-temperature bleaching performance, it enhanced the surfactant action which contributed to removing oily contaminants from textiles. Color-safe performance of SAPA_m-n was evaluated by cleaning a dyed cotton fabric at room temperature. It was found that the peroxide bleach activated by SAPA_m-n resulted in no apparent color change of the dyed cotton fabric. The results of this study provide new insights on textile cleaning at room temperature for the purpose of energy saving.     

锅炉EDTA化学清洗

对EDTA清洗工艺和如何确定清洗参数及工艺过程进行了探讨.介绍某电厂用EDTA对热力系统进行清洗,并取得良好的效果.     

260t/h循环流化床锅炉清洗实践

本文对循环流化床锅炉(CFB)新建锅炉汽水系统的清洗目的、清洗回路的设置、清洗前得准备工作、清洗步骤、清洗过程的检测、清洗质量的评定进行了具体的论述。