近红外原油快速评价技术预测常减压蒸馏装置侧线收率

摘要

In the present paper ,based on the fast evaluation technique of near infrared ,a method to predict the yield of atmos-pheric and vacuum line was developed ,combined with H/CAMS software .Firstly ,the near-infrared(NIR) spectroscopy method for rapidly determining the true boiling point of crude oil was developed .With commercially available crude oil spectroscopy da-tabase and experiments test from Guangxi Petrochemical Company ,calibration model was established and a topological method was used as the calibration .The model can be employed to predict the true boiling point of crude oil .Secondly ,the true boiling point based on NIR rapid assay was converted to the side-cut product yield of atmospheric/vacuum distillation unit by H/CAMS software .The predicted yield and the actual yield of distillation product for naphtha ,diesel ,wax and residual oil were compared in a 7-month period .The result showed that the NIR rapid crude assay can predict the side-cut product yield accurately .The near infrared analytic method for predicting yield has the advantages of fast analysis ,reliable results ,and being easy to online operate ,and it can provide elementary data for refinery planning optimization and crude oil blending .%常减压蒸馏装置侧线收率对于装置操作优化具有重要的实际意义，但缺乏可靠的预测方法。在近红外原油快速评价技术基础上，结合H/CAMS软件，建立了常减压侧线收率的有效预测方法。首先建立近红外光谱快速测定原油实沸点蒸馏收率的方法，在市售原油光谱数据库的基础上，添加广西石化常炼原油品种，采用拓扑法建立分析模型，验证结果表明，近红外分析方法预测的实沸点蒸馏收率与实际测定结果基本吻合。进一步通过H/CAMS软件将近红外原油快速评价技术得到的实沸点蒸馏收率转换为常减压蒸馏装置的侧线收率。将该方法得到的常减压装置石脑油、柴油、蜡油和渣油收率与炼厂生产报表中各个侧线的收率数据进行对比，7个月的对比数据表明，近红外原油快速评价技术预测的各个侧线生产收率能够反应实际生产收率的变化趋势。基于近红外分析方法预测常减压蒸馏装置侧线收率分析速度快，结果可靠，容易实现在线操作，可以为炼厂计划优化、原油调合等过程提供基础数据。