共查询到20条相似文献,搜索用时 187 毫秒
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不同油气田所产生的含油污泥物理化学性质复杂多样.超临界水处理技术因其具有直接湿生物进样、处理范围广、处理效率高等特点而广受关注.本文对超临界水氧化处理技术的实验研究进展、工业应用进展、工业化面临问题三个方面进行了综述,认为超临界水氧化处理技术处理含油污泥工业化具有远大前景. 相似文献
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《化学工业与工程技术》2015,(5):71-76
综述了我国含油污泥的危害和污染现状,总结了含油污泥无害化及资源化的常规处理技术,介绍了近几年出现的新的处理技术,包括微波处理技术、超声波处理技术、低温热解技术、超临界水氧化技术、植物修复技术以及制作橡胶填料剂,并对我国含油污泥处理技术的发展提出了建议。 相似文献
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超临界水氧化技术是一种新型、高效的废物处理技术,在处理有毒、难降解工业废水时有其独特的优势。本文介绍了超临界水氧化技术的基本原理,总结了近几年来国内外超临界水氧化技术处理工业废水的研究进展,分析了该技术存在的技术问题,主要包括腐蚀、盐沉积、高能耗等,并在此基础上提出了相应的解决对策。 相似文献
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Donghai Xu Shuzhong WangXingying Tang Yanmeng GongYang Guo Yuzhen WangJie Zhang 《Chemical Engineering Research and Design》2012
Supercritical water oxidation (SCWO) is a promising technology to deal with organic wastes. Nowadays, we have successfully constructed the first SCWO pilot scale plant of China with a specific reactor configuration and optimized system compositions to treat sewage sludge. In this report, the existing problems and corresponding solutions concerning corrosion, plugging and high running cost in SCWO are introduced systematically. The detailed system components, evident properties, advanced control methods and primary experiment results of the pilot scale plant are described objectively. Moreover, a simple economical comparison with incineration is carried out and subsequently in-depth works are also proposed for further promoting the commercial application of the plant. The information should be helpful for designing and constructing SCWO plant to dispose sewage sludge or other organic wastewaters. 相似文献
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在间歇反应釜中进行了含油污泥超临界水氧化实验,反应压力为25 MPa,反应温度为390~450℃,反应时间为1~10 min,研究了超临界水氧化后流出液的COD去除效果和可生化降解性以及气体产物组成的变化规律,并对剩余残渣进行了分析。结果表明,随着氧化温度升高,COD去除效果提高,处理后流出液可生化降解性得到明显改善,CO和CO2分别是反应的中间产物和最终产物。在450℃下氧化反应10 min后,COD去除率达到92%,尾气除含有2.64%的CO外不含其它有害气体成分。处理后的固体残渣中基本不含有机物质,主要为无机矿物成分,达到无害化处理要求。 相似文献
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Supercritical water oxidation—Current status of full-scale commercial activity for waste destruction
After more than three decades since its potential was first recognized, supercritical water oxidation (SCWO) remains an innovative and viable treatment technology for destruction of aqueous based organic wastes. An extensive data base of destruction efficiencies, corrosion data, and salt phase behavior has been developed over the years through the combined efforts of many investigators at both the fundamental research and commercial level. As a result, SCWO technology has been increasingly utilized in a variety of full-scale designs and applications, handling feeds as diverse as polychlorinated biphenyls (PCBs), sewage sludge, spent catalysts, and chemical weapons. This paper reviews the status of current full-scale commercial SCWO facilities around the world, focusing on the unique challenges and design strategies employed by different companies for corrosion and salt precipitation control in each application. A summary of past commercial SCWO activity as well as future plans among the current active SCWO companies is also included. 相似文献
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Corrosion resistance of stainless steels in chloride containing supercritical water oxidation system
Young Sik Kim D. Bryce Mitton Ronald M. Latanision 《Korean Journal of Chemical Engineering》2000,17(1):58-66
As the science and process applications of supercritical water (SCW) and supercritical water oxidation (SCWO) become more
thoroughly understood, it is logical to envision the use of the SCWO process by diverse industries and public wastewater and
sludge generators. This technology can be adapted to accomplish either pre or end-of-pipe wastewater treatment. There is a
need to destroy both military and civilian hazardous waste, and urgency, mandated by public concern over traditional waste
handling methodologies, to identify safe and efficient alternative technologies. By capitalizing on the properties of water
above its critical point, 374 °C and 22.4 MPa for pure water, this technology provides rapid and complete oxidation with high
destruction efficiencies at typical operating temperatures. Nevertheless, corrosion of the materials of fabrication is a serious
concern. While iron-based alloys and nickel-based alloys are generally considered important for service applications, results
from laboratory and pilot-scale SCWO systems presently in operation indicate that they will not withstand some aggressive
feeds. Significant weight loss and localized effects, including stress corrosion cracking (SCC) and dealloying, are seen in
chlorinated environments. This work assesses the corrosion characteristics of iron-based stainless steels exposed to high
supercritical temperatures in a chlorinated military waste containing salts. 相似文献
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超临界水氧化是新兴的、有效的有机废物处理技术。介绍了超临界水的特性和超临界水氧化的基本原理与优点,综述了超临界水氧化技术在各种有机污染物处理中的应用,指出了为实现超临界水氧化技术工业化亟待解决的问题。 相似文献
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超临界水氧化技术是一种快速彻底降解废水中有机物质的新型处理技术。在超临界水氧化有机物中 ,乙酸被认为是一种中间产物 ,乙酸氧化是反应速率的控制步骤 ,其氧化动力学的研究对反应器设计具有重要意义。大部分研究都集中在动力学参数和反应条件如温度、压力、密度和停留时间上。最近的研究发现加入二氧化锰等催化剂 ,可缓和反应温度、压力条件 ,以达到高效节能的目的。综述了目前在超临界水氧化乙酸动力学方面的研究进展。对连续平推流或间歇反应器中实验数据用幂指数曲线拟合得到的动力学方程表明 ,乙酸氧化为一级反应 相似文献
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超临界水氧化技术及其应用 总被引:1,自引:0,他引:1
超临界水氧化技术(SCWO)是一种新型的有机废水处理技术,具有反应速率快、处理效果好、不形成二次污染和去除效率高等优点。介绍了超临界水的特性和氧化反应机理,综述了SCWO在处理火炸药生产废水中的应用,并针对其存在的设备腐蚀、反应器堵塞等问题提出了解决方法和研究方向。 相似文献