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1概述某石化企业苯酚丙酮装置主要由烃化、氧化、精制和回收单元组成,是以苯和丙烯为原料,通过烃化反应生产异丙苯,再利用空气将异丙苯氧化为过氧化氢异丙苯,以硫酸作催化剂将过氧化氢异丙苯分解生产苯酚和丙酮。精制单元××换热器,在使用过程中换热器管板与壳程筒体对接接头处、壳程筒体蒸汽入口接管角焊缝处、入口接管弯头处(弯头与下直管段相连的焊缝)出现了穿透性裂纹,具体位置如图1所示。换热器及入口接管上开裂管件具体操
1 Overview A petrochemical enterprises phenol acetone unit is mainly composed of hydrocarbonation, oxidation, refining and recovery unit is based on benzene and propylene as raw materials, through the reaction of cumene production of cumene, the use of air to cumene oxidation of hydrogen peroxide Cumene, sulfuric acid as a catalyst cumene hydroperoxide decomposition of phenol and acetone production. Refined unit × × heat exchanger, the heat exchanger tube plate and shell shell in the process of butt joint at the shell shell tube steam inlet pipe fillet weld at the entrance to take over the elbow (elbow and lower straight pipe section Connected weld) appeared penetrating crack, the specific location shown in Figure 1. Heat exchanger and the inlet pipe on the cracking of concrete operations