Pressure-relief Tower Fill The Failure Analysis And Research ReFers To The Protective Properties

Often the pressure-relief devices in crude distillation process there are a series of corrosion problems, it directly influences the device of security, stability, long period and loads and quality operation. In everyday applications, decompression tower corrosion problems more attracted everyone’s eyes, and tower internals direct contact corrosive medium, the most easily corrosion. Therefore developed production of a corrosion resistant, can lengthen production cycle of new type filler, has the significant economic significance.This article through to corrosion failure analysis method, the corrosion mechanism research methods and protective performance experiment methods of investigation situation at home and abroad by suitable for petrochemical industry corrosion failure analysis methods, namely the macro morphology, chemical composition analysis, metallographic analysis on the refinery of lanzhou petrochemical company often pressure-relief device decompression tower packing failure analysis, thought the corrosion packing surface passivation membrane decompression tower damaged serious corrosion activation, creating plenty of corrosive pit; Corrosion in the process of hydrogen generation, in high temperature sulfur and naphthenic acid also existence situation, is intensifying, corrosion rate leads to matrix corrosion.At the same time on the reduced pressure tower protection technology research stainless steel packing, combining the refinery of lanzhou petrochemical company "take off three note" process anti-corrosion measures, using surface treatment technology of stainless steel is packing surface passivation disposal, get can industrialization decompression of the tower packing protection technology. Select the most commonly used in petrochemical industry, relatively cheap stainless steel random packings, screen structured packings and orifice plate corrugated, using liquid chemical method of stainless steel surface passivation treatment, get three kinds of stainless steel packing passivation the optimal process, research and development of new, more efficient anticorrosion stainless steel packing, can improve the corrosion resistance and improve packing wettability can and separation efficiency.