镇海炼化加工高硫原油防腐蚀技术

镇海炼化公司在加工高硫原油时,工艺设备和管道腐蚀严重.为此,进行了综合治理,收到较好效果除做好"一脱三注”和采取原油混炼措施外,还在设备选材和材料表面处理方面采取了不少措施,如换热器管束化学镀Ni-P;用ND钢(09CrCuSb)制做空气预热器;用08Cr2AlMo钢管制做抗H2S-H2O和H2S-HCN-H2O腐蚀的换热器管束;用双相不锈钢制做换热器管束,以抗Cl-应力腐蚀以及复合钢板在腐蚀较严重的设备上的应用.另外,在一些设备和管道的外部还采取了涂敷防腐涂料的措施.

CORROSION PROTECTION TECHNOLOGY FOR REFINENG HIGH SULFUREOUS CRUDE FOR ZHENHAI REFINED AND CHEMICAL COMPANY

The process equipment an d pipelines of Zhenhai refined and chemi cal company suffered from serious corros ion in refining high sulfureous crude.So that,it should be tackled in a comprehe nsive way,and a fairly good effictivenes s is obtained.Besides doing a good job o f "one removal three injection" and adop ting measure of crude mixed refining,som e measure of equipment material selectio n and surface treating of material are a dopted.that are:heat exchanger bundle is adopted Ni-P chemcial plating;Air coole r bundle is made from ND steel(09CrCuSb) ;Heat exchanger bundle is made from 08Cr 2AlMo steel to protect against the corro sion of H 2S-H 2O and H 2S-HCN-H 2O;Heat exchanger bundle is made from diphase s tainless steel to protect against Cl- st eel corrosion;The clad steel plate is ap plied on the serions corrosion equipment .In addition,on the external surfaces of equipment and pipeline are painted with corrosion-proof coating.