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Experiences in the Installation of Hydrocarbon Monitoring Systems for Flares and Cooling Towers

机译:安装火炬和冷却塔碳氢化合物监测系统的经验

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As a part of the Texas State Implementation Plan (SIP) for the Ozone Non-attainment Area including the Houston-Galveston Region, the Texas Commission on Environmental Quality (TCEQ) promulgated new regulations that require the continuous measurement of ethylene, propylene, 1,3-butadiene and isomers of butane [highly reactive volatile organic compounds (HRVOC)], from flares and cooling towers. While analytical methods exist for measuring these compounds in various process applications, they typically do not involve applications where the concentration ranges between the ppm levels up through significant weight percent levels as might be found in a flare sample. Likewise, the measurement of these compounds in a cooling water system presents its own unique problems. The regulation requires use of the "El Paso Stripper" type air stripping device or to demonstrate by actual testing an equivalent technology. When these requirements are coupled with a deadline of having such a system operational by the end of December 2005, the challenges can be significant. This paper describes some of the experiences with the installation of these systems at the Lyondell Chemical Company, Channelview Chemical Complex. This facility is installing six flare monitoring systems and eight cooling water monitoring systems to meet these requirements and adding six new analyzer shelters with all of the associated infrastructure to support them. Since the required sampling locations in most cases are not close enough to be able to use existing process analyzer shelters, the logistics of the installations were a significant part of the project. Overall the Lyondell facilities are installing 43 monitoring systems in 33 shelters located at 10 different facilities in the Houston-Galveston area. The methodology associated with these systems can best be described as equivalent to compliance stack sampling with the added requirements that it be done continuously (i.e., have a 95+ percent on-stream time and an analyzer cycle time of not more than 15 minutes). Sample location issues created challenges not envisioned when the rules were developed. For example, flares located hundreds of feet from adjacent operations and underground cooling water lines.
机译:作为包括休斯敦-加尔维斯顿地区在内的德克萨斯州臭氧不达标地区实施计划(SIP)的一部分,德克萨斯州环境质量委员会(TCEQ)颁布了新法规,要求对乙烯,丙烯,来自火炬和冷却塔的3-丁二烯和丁烷的异构体[高反应性挥发性有机化合物(HRVOC)]。尽管在各种过程应用中都存在用于测量这些化合物的分析方法,但它们通常不涉及浓度范围在ppm级至火炬样品中可能存在的大量重量百分数之间的应用。同样,在冷却水系统中对这些化合物的测量也存在其自身的独特问题。该法规要求使用“ El Paso汽提塔”型空气汽提装置,或通过实际测试证明其等效技术。当这些要求与在2005年12月底之前使这种系统投入运行的最后期限相结合时,挑战将是巨大的。本文介绍了在Channelview Chemical Complex的Lyondell Chemical Company安装这些系统的一些经验。该设施正在安装六个火炬监测系统和八个冷却水监测系统,以满足这些要求,并增加六个新的分析仪防护罩,并为所有相关基础设施提供支持。由于在大多数情况下所需的采样位置距离得不够近,无法使用现有的过程分析仪防护罩,因此设备的物流是该项目的重要组成部分。总体而言,Lyondell设施正在休斯敦-加尔维斯顿地区10个不同设施的33个庇护所中安装了43个监视系统。与这些系统相关的方法可以最好地描述为等同于法规遵从性堆栈采样,并具有连续执行的附加要求(即,运行时间超过95%,分析仪循环时间不超过15分钟)。样本位置问题带来了制定规则时未曾想到的挑战。例如,火炬位于距相邻作业和地下冷却水管线数百英尺的位置。

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