减黏工艺生产低硫重质船用燃料油研究

STUDY ON PRODUCTION OF LOW-SULFUR HEAVY MARINE FUEL OIL BY VISBREAKING PROCESS

随着国内炼油能力和成品油需求矛盾日益突出,低硫船用燃料油生产成为炼油厂重油平衡以及盈利的关键。目前企业常采用轻质馏分稀释低硫减压渣油来调合生产低硫船用燃料油,存在成本高、盈利能力差的问题。利用减黏工艺大幅度降低减压渣油的黏度和倾点,可实现以大比例减黏渣油调合生产低硫船用燃料油。试验结果表明,减压渣油经减黏改质后,降黏率超过90%,倾点降至30℃以下,与原调合方案相比,轻质馏分调入量由30.0%降至3.2%,生产成本大幅降低。此外,采用减黏路线生产低硫船用燃料油,降低了渣油加氢装置负荷,使进入催化裂化装置的高残炭劣质组分减少,改善了催化裂化装置进料,综合测算企业效益可增加7982万元/a。由低硫减压渣油经减黏工艺生产低硫重质船用燃料油,对低硫船用燃料油的生产和低硫减压渣油的高效利用均提供了可借鉴的思路。

With the increasing prominent contradiction between domestic refining capacity and oil products demand,the production of low-sulfur marine fuel has become the key to heavy oil balance and profitability.At present,light fractions are often used to dilute low-sulfur vacuum residue to produce low-sulfur marine fuel.The viscosity and pour point of vacuum residue can be greatly reduced by visbreaking process,and blending of vacuum residue to produce low-sulfur marine fuel can be realized.The results show that the viscosity reduction rate of residual oil is over 90%and the pour point is below 30℃.Compared with the original blending scheme,the blending amount of light fraction is reduced from^(3)0%to 3.2%,and the production cost is greatly reduced.In addition,the production of low-sulfur marine fuel by a visbreaking route can reduce the load of the hydrogenation unit,the amount of high carbon residue and low quality components entering the FCC unit,and improves the feed to the catalytic unit.The comprehensive calculation of enterprise benefit can increase by 79.82 million Yuan/a.The production of low-sulfur heavy marine fuel from low-sulfur residue by visbreaking process provides a reference for the production of low-sulfur marine fuel and the efficient utilization of low-sulfur residue.