通过NIRS近红外光谱仪在线监测石脑油馏分中的水含量-瑞士万通近红外光谱分析仪产品...
本帖最后由 red 于 2019-6-27 23:28 编辑Inline monitoring of water content in naphtha fractions by NIRS 通过NIRS(近红外光谱仪)在线监测石脑油馏分中的水含量
Crude oil, which consists of at least 500 different components, is processed by fractionation and refining to produce liquefied gas, gasoline, diesel, heating fuel, and lubricants as well as a large variety of other products. As the «lubricant» of the global economy, it covers approximately 33% of our energy demand (2017) and is used in the chemical industry for the production of plastics, textiles, dyes, cosmetics, fertilizers, detergents, building materials, and pharmaceuticals.
原油由至少500种不同的组分组成，通过分馏和精炼加工，生产液化气，汽油，柴油，加热燃料和润滑剂以及各种其他产品。 作为全球经济的“润滑剂”，它占我们能源需求的约33％（2017年），用于化学工业，用于生产塑料，纺织品，染料，化妆品，化肥，洗涤剂，建筑材料和药品。
The crude oil is desalted, then separated into several intermediate materials via atmospheric or crude distillation unit (distillation tower, CDU), depending on boiling temperature. The quality of fractions from the CDU need to be continuously monitored.To satisfy high demand for gasoline, the heavier sidecuts from the CDU are reformed and resolved to increase the light intermediate materials, thus increasing the gasoline fraction. The overhead distillate fraction naphtha (a mixture of C5 to C10 hydrocarbons) is produced from relatively light components and is supplied to ethylene plants as a raw material.
将原油脱盐，然后根据沸腾温度通过常压或原油蒸馏装置（蒸馏塔，CDU）分离成几种中间原料。 需要持续监测来自CDU的馏分的质量。 为了满足对汽油的高需求，来自CDU的较重的侧切口被重新形成并且被分解以增加轻质中间材料，从而增加汽油分数。 塔顶馏出物馏分石脑油（C5至C10烃的混合物）由相对轻的组分制备，并作为原料供应给乙烯装置。
Detail of refining, cracking, and separation processes focusing on naphtha gas streamwith stars noting suggested NIR measuring points在石脑油气路中精炼，裂解和分离过程细节中的焦点（带星号为建议NIR测量点）
The CDU must operate efficiently at all times, however the crude feed is full of impurities which cause corrosion and fouling in the refining process. Operating conditions that also influence corrosion and fouling include temperature of the crude column overhead, crude, and reflux, as well as the water wash and overhead vapor water content. Water absorbs the acids and amines, and when it vaporizes as reflux flowing down the column, heated salts are deposited. These salts accumulate, causing a higher pressure drop, resulting in a loss of efficiency and profit.
CDU必须始终有效地运行，但原油原料中充满了杂质，这些杂质会在精炼过程中引起腐蚀和结垢。 也影响腐蚀和结垢的操作条件包括原油塔顶馏出物的温度，原油和回流，以及水洗和塔顶蒸气水含量。 水吸收酸和胺，当它作为回流流下塔蒸发时，加热的盐沉积。 这些盐积聚，导致更高的压降，导致效率和利润的损失。
Determining the water content of crude oil, refined petroleum products, fuels, biofuels, lubricants, and other products is important for maintaining quality control, meeting trade specifications, protecting financial value, and enhancing process optimization. Knowing accurate water content in hydrocarbons enables the refinery to take steps to reduce risks from corrosion, safety problems, and infrastructure damage which can be caused from unwanted water content levels. Generally the determination of water content in naphtha fractions is performed with a reference method (also provided by Metrohm) which requires several reagents.
确定原油，精炼石油产品，燃料，生物燃料，润滑油和其他产品的含水量对于保持质量控制，满足贸易规范，保护财务价值和加强工艺优化非常重要。 了解碳氢化合物中的准确含水量，使炼油厂能够采取措施降低因不必要的含水量水平造成的腐蚀，安全问题和基础设施损坏的风险。 通常，用参考方法（也由Metrohm提供）进行石脑油馏分中水含量的测定，其需要几种试剂。
A safer, faster way to monitor the water content in CDU overhead fractions is inline with reagent-free near-infrared spectroscopy (NIRS). Spectroscopy offers numerous advantages over many wet-chemical analytical methods. NIRS is economical and fast, enabling qualitative and quantitative analyses that are noninvasive and nondestructive. A diverse range of parameters can be determined simultaneously in seconds from just one analysis. NIRS is an indispensable analysis technique that can be used along the entire production chain – from incoming materials to processing to the quality control of finished products.
监测CDU塔顶馏分中水含量的更安全，更快速的方法是使用无试剂近红外光谱（NIRS）。 与许多湿化学分析方法相比，光谱学具有许多优点。 NIRS经济，快速，可实现非侵入性和非破坏性的定性和定量分析。 只需一次分析，就可以在几秒钟内同时确定各种参数。 NIRS是一种不可或缺的分析技术，可以在整个生产链中使用 - 从进料到加工到成品的质量控制。
Our NIRS process analyzers enable comparison of real-time spectral data from the process to the primary method to create a simple, yet indispensable model for your process needs. Gain more control over your production with a Metrohm Process Analytics NIRS XDS system configured for applications in ATEX zones, capable of monitoring up to 9 process points with the multiplexer option.
我们的NIRS过程分析仪可以将过程中的实时光谱数据与经典方法进行比较，从而为您的过程需求创建一个简单但不可或缺的模型。 使用为ATEX区域中的应用配置的Metrohm Process Analytics NIRS XDS系统，可以更好地控制您的生产，能够使用多路复用器选项监控多达9个过程点。
Application: Sample is measured in 2 mm pathlength flow cell after the drying phase. Wavelength range used: 1800–2100 nm.
ATEX analyzer is recommended for explosion-proof areas.
应用： 在干燥阶段后，在2mm光程流动池中测量样品。 使用的波长范围：1800-2100nm。
ATEX分析仪推荐用于防爆区域。
Typical Range: 0–0.3 w% H2O
典型范围： 0-0.3 w％H2O
Remarks: A reference method (such as Metrohm Karl Fischer titration) must still exist as a check method. An appropriate
range of samples covering the process variability should be analyzed by both methods to build an accurate
NIR model. Correlations are made to process specifications
备注： 参考方法（如Metrohm Karl Fischer万通卡尔费休滴定法）仍必须作为检查方法存在。 应通过两种方法分析涵盖过程变异性的适当范围
的样品，以建立准确的NIR模型。 与工艺规范相关。
（L）经典方法和NIR模型之间的数据相关性，说明方法之间有精确的相关性。 （R）配置用于ATEX区域应用的NIRS XDS过程分析仪。
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