石油化工腐蚀与防护
石油化工腐蝕與防護
석유화공부식여방호
PETROCHEMICAL CORROSION AND PROTECTION
2011年
6期
29-32
,共4页
常减压蒸馏%常压炉%泄漏
常減壓蒸餾%常壓爐%洩漏
상감압증류%상압로%설루
atmospheric- vacuum distillation%atmospheric furnace%leakage
中国石油化工股份有限公司上海高桥分公司Ⅰ常减压蒸馏装置原设计加工大庆原油，管道材质以碳钢为主，随着原油劣质化和长周期运行，已不能满足生产需要。2009年1月14日常压炉出口发生腐蚀泄漏，立即采取包焊处理，并对装置内高温管线及塔顶冷凝段进行测厚，发现多处腐蚀减薄。根据减薄程度对这些部位进行包焊或测厚监控。针对装置情况，采取多种手段，缓解腐蚀状况，加强腐蚀监控。控制原油性质，特别是多种原油混炼时混合均匀及酸值控制；做好定点测厚和检测，选择高温、高压、高速介质冲刷、具有腐蚀介质的苛刻部位，使测厚工作科学有效；做好化学分析监测，及时调节“一脱三注”；结合装置检修，将危险部位设备材质升级。多种手段同时进行，保证装置安全运行。
中國石油化工股份有限公司上海高橋分公司Ⅰ常減壓蒸餾裝置原設計加工大慶原油，管道材質以碳鋼為主，隨著原油劣質化和長週期運行，已不能滿足生產需要。2009年1月14日常壓爐齣口髮生腐蝕洩漏，立即採取包銲處理，併對裝置內高溫管線及塔頂冷凝段進行測厚，髮現多處腐蝕減薄。根據減薄程度對這些部位進行包銲或測厚鑑控。針對裝置情況，採取多種手段，緩解腐蝕狀況，加彊腐蝕鑑控。控製原油性質，特彆是多種原油混煉時混閤均勻及痠值控製；做好定點測厚和檢測，選擇高溫、高壓、高速介質遲刷、具有腐蝕介質的苛刻部位，使測厚工作科學有效；做好化學分析鑑測，及時調節“一脫三註”；結閤裝置檢脩，將危險部位設備材質升級。多種手段同時進行，保證裝置安全運行。
중국석유화공고빈유한공사상해고교분공사Ⅰ상감압증류장치원설계가공대경원유，관도재질이탄강위주，수착원유렬질화화장주기운행，이불능만족생산수요。2009년1월14일상압로출구발생부식설루，립즉채취포한처리，병대장치내고온관선급탑정냉응단진행측후，발현다처부식감박。근거감박정도대저사부위진행포한혹측후감공。침대장치정황，채취다충수단，완해부식상황，가강부식감공。공제원유성질，특별시다충원유혼련시혼합균균급산치공제；주호정점측후화검측，선택고온、고압、고속개질충쇄、구유부식개질적가각부위，사측후공작과학유효；주호화학분석감측，급시조절“일탈삼주”；결합장치검수，장위험부위설비재질승급。다충수단동시진행，보증장치안전운행。
The 1 # atmospheric - vacuum distillation unit in SINOPEC Shanghai Gaoqiao Petrochemical Company was originally designed for processing Daqinig Crude. The piping material was mainly carbon steel. With increasing amount of low - quality crude processed by the unit and necessity of long - term operation, the unit could not be operated to meet the production requirements. In January 14, 2009, the corrosion leakage occurred at the outlet of atmospheric furnace and leaking was repaired by packet welding. The measurement of thickness of high - temperature pipelines in the unit and overhead condensing section found corrosion thinning at many locations, and packet welding or thickness measurement monitoring were adopted based upon the thinning conditions. Many have been taken to reduce unit corrosion and strengthen corrosion monitoring, such as control of crude oil quality especially control of the crude oil mixing and TAN, thickness measurement and monitoring for the high - pressure and high - temperature locations which are subject to high - velocity media impingement and corrosion of corrosive media, good chemical analysis and monitoring to appropriately adjust the desahing and injections of water, corrosion inhibitor and fouling inhibitor, upgrading of materials for the equipment in difficult services in overhaul of the unit. As the result, a reliable safe operation of the unit has been ensured.
