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 .

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 Ⅳemission 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, Ⅳgasoline 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 resultin g 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

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)