加氢毕业设计 (2)

兰州石化80万吨/年催化裂化汽油加氢脱硫装置设计

摘 要

本设计采用了采用法国Axens 公司的Prime － G + 工艺进行了兰州石化公司80Mt/a催化汽油加氢脱硫装置工艺设计。随着汽车尾气排放标准的日益严格,我国对汽油的硫含量也提出了严格的限制。拟议中的国Ⅳ汽油排放标准要求汽油中硫质量分数不大于50μg /g。Prime—G+ 是采用固定床双催化剂的加氢脱硫技术,HR － 845 和HR － 806 新型催化剂工业应用结果表明: 催化汽油脱硫效果显著，混合汽油产品总硫小于65 μg /g，满足京Ⅳ汽油标准; 并且汽油辛烷值损失小，具有反应压力低、温度缓和、便于操作和控制等优点，催化裂化全馏分汽油脱硫率可达到98％。设计结果,(填写设计结论，如催化剂装量、反应器个数、几何尺寸等)。

关键词：固定床，选择性加氢脱硫，辛烷值损失，催化剂

Abstract This design uses the company by the French Axens Prime - G + technology of Lanzhou Petrochemical Company 80Mt / a catalytic gasoline hydrodesulfurization unit process design , the process includes a full distillate selective hydrogenation unit (SHU) and fractionation unit , heavy gasoline hydrodesulfurization (HDS) unit in two parts .

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Selective catalytic hydrogenation and depth of gasoline desulfurization . As cars become increasingly stringent emissions standards , China's sulfur content of gasoline also put strict limits . The proposed requirements Ⅳ emission standard gasoline sulfur content in gasoline is not more than 50μg / g. Prime-G+ is a double fixed bed catalyst for hydrodesulfurization , HR - 845 and HR - 806 new catalyst industrial application results show : the catalytic gasoline desulfurization effect is significant , the total sulfur gasoline product mix is less than 65 μg / g, Ⅳ gasoline to meet in Beijing standard ; gasoline octane loss is small and has a low reaction pressure , temperature, ease , ease of operation and control , etc., the whole fraction of FCC gasoline desulfurization rate can reach 98% . Calibration results show that : the mass fraction of sulfur processing unit when 195μg / g FCC gasoline sulfur gasoline product mix resulting mass fraction 38.5μg / g, mercaptan sulfur content of 3.5lμg / g; research octane number loss of a unit , to meet the design ( no more than 1.8 units ) requirements ; blended gasoline yield was 99.91% , higher than the design value ( 99.90% ) ; energy consumption 934.6MJ / t, lower than the design value (937.2MJ / t). Under full load operation of the device is relatively stable , the obvious economic benefits .

Key words:fixed bed,selective hydrogenation desulfurization,octane number loss,catalysts

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目录

1.文献综述 ........................................................... 1 1.1 前言............................................................ 1 1.1.1 汽车尾气对环境的影响 ........................................ 1 1.1.2 车用汽油性质与尾气排放的关系 ................................ 2 1.1.3 欧美车用汽油标准的现状 ...................................... 3 1.1.4车用汽油国三国四标准的现状 .................................. 4 1.2 催化裂化汽油.................................................... 7 1.2.1 催化裂化汽油中硫的存在形态与分布规律 ........................ 7 1.2.2 催化裂化汽油中烯烃的分布规律 ................................ 8 1.2.3 催化裂化汽油脱硫技术线路 .................................... 9 2项目可行性论证..................................................... 11 2.1 项目建设意义................................................... 11 2.2 项目建设规模................................................... 12 2.3 国内外催化裂化汽油选择性加氢脱硫技术现状....................... 13 2.3.1 加氢脱硫催化剂 ............................................. 13 2.3.2 催化裂化汽油选择性加氢脱硫技术 ............................. 15 2.3.3 国外技术 ................................................... 16 2.3.4 国内技术 ................................................... 18 3工艺流程设计....................................................... 20

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