CAJ | 학술논문

常减压Ⅱ套蒸馏装置（Ⅱ套蒸馏装置）原设计加工大庆原油，设备管道均采取碳钢材质，未从设备材质方面考虑防腐蚀问题，2004年以来管输大庆原油中混入俄罗斯原油、冀东原油，混输大庆原油中硫的质量分数从0．1％升高到0．27％，酸值也从原来的0．04mgKOH／g升高到0．62mgKOH／g，装置设备腐蚀加剧，设备管道的现有材质已不能满足安全生产的需要。为提高装置设备抗腐蚀能力，Ⅱ套蒸馏装置对240℃以上设备、管道进行材质升级改造，升级后的材质按加工原油硫质量分数为0．5％，酸值为0．7mgKOH／g设计，材质升级的范围包括加热炉、塔器、冷换设备和管道等。该文通过对材质升级前后原料性质、腐蚀在线系统数据的对比分析，得出在原料性质基本不变的情况下，设备材质升级部分的管道腐蚀速率大幅下降，管道防腐蚀效果明显。检验了材质升级理论的抗腐蚀效果是可行的。
상감압Ⅱ투증류장치（Ⅱ투증류장치）원설계가공대경원유，설비관도균채취탄강재질，미종설비재질방면고필방부식문제，2004년이래관수대경원유중혼입아라사원유、기동원유，혼수대경원유중류적질량분수종0．1％승고도0．27％，산치야종원래적0．04mgKOH／g승고도0．62mgKOH／g，장치설비부식가극，설비관도적현유재질이불능만족안전생산적수요。위제고장치설비항부식능력，Ⅱ투증류장치대240℃이상설비、관도진행재질승급개조，승급후적재질안가공원유류질량분수위0．5％，산치위0．7mgKOH／g설계，재질승급적범위포괄가열로、탑기、랭환설비화관도등。해문통과대재질승급전후원료성질、부식재선계통수거적대비분석，득출재원료성질기본불변적정황하，설비재질승급부분적관도부식속솔대폭하강，관도방부식효과명현。검험료재질승급이론적항부식효과시가행적。
The Ⅱ^# atmospheric -vacuum distillation unit in SINOPEC Beijing Yanshan Petrochemical Co. Ltd was originally designed for processing Daqinig Crude. Carbon steel was selected for the equipment piping material without consideration of corrosion protection. When the unit began to process blended Daqing Crude, Russian Crude, Jidong Crude, the sulfur and acid value of blended Crude was increased from 0.1 to 0.27 and from 0. 04 mgKOH/g to 0.62 mgKOH/g respectively, the equipment corrosion deteriorated and the existing materials of equipment and piping could not meet the safe operation requirements. To improve the equipment corrosion resistance performance, the materials of equipment such as furnaces, tower vessels, heat exchangers, etc and piping for the service temperature of over 240 ℃ were upgraded for pr℃ essing crude oil with 0.5% of sulfur and 0.7 mgKOH/g of acid value. The study of data of crude oil properties and online corrosion monitoring before and after material upgrading show that the corrosion rate of piping of upgraded materials has been greatly reduced and corrosion resistance improvement is obvious, and material upgrading is practical in improvement of corrosion resistance performance.