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首页> 外文会议>Corrosion Conference and Expo >EROSION OF AUSTENIT1C STAINLESS STEEL 90° ELBOWS OF CHARGE HEATER TUBES IN ATMOSPHERIC RESIDUE DE-SULFURIZATION UNIT (ARDS)
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EROSION OF AUSTENIT1C STAINLESS STEEL 90° ELBOWS OF CHARGE HEATER TUBES IN ATMOSPHERIC RESIDUE DE-SULFURIZATION UNIT (ARDS)

机译：奥氏体不锈钢90°弯曲电荷加热器管中的腐蚀，大气残留脱硫装置（ARDS）

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摘要

Charge heater radiant and convection coils (tubes, U-bends & 90° radiant outlet elbows) in Atmospheric Desulfurization Unit (ARDS) of Mina Abdulla Refinery are made up of TP 347SS material. Charge heater is used for heating of atmospheric residue prior to entering into ARDS reactors for further desulfurization / de-metallization. Severe erosion and thinning was observed in the 90° radiation elbows during Year 2002 shutdown after a service life of about 12 Years. Erosion was noticed in charge heaters H-12-101 & H-12-201 in both ARDS Trains. These radiation 90° elbows are outside the charge heater firebox upstream of the heater outlet header. This particular erosion phenomenon was restricted to a small area of the 90° elbows and resembled a sharp knife-like attack at the point of maximum damage. The most probable reasons for such severe erosion was the impingement of coke particles at the outer radius during online spelling and steam/air decoking operation during which velocities of steam/air may reach a very high magnitude. The high velocity steam/air stream carrying coke particles causes a bullet like impact on the point of incidence and the metal thereof is removed causing erosion.
机译：Mina Abdulla炼油厂大气脱硫装置（ARDS）的电荷加热器辐射和对流线圈（管，U形弯头和90°辐射出口弯头）由TP 347SS材料组成。电荷加热器用于在进入ARDS反应器之前加热大气残留物以进行进一步脱硫/去金属化。在2002年辐射肘部在2002年的使用寿命约12年后，在90°辐射肘部观察到严重的侵蚀和变薄。在两个ARDS列车中，在充电加热器H-12-101＆H-12-201中注意到侵蚀。这些辐射90°弯头位于加热器出口标头上游的电荷加热器滤池外。这种特殊的侵蚀现象仅限于90°肘部的一小部分，并且在最大损坏的点处类似于锋利的刀状攻击。这种严重侵蚀的最可能原因是在在线拼写和蒸汽/空气衰减操作期间在外半径处撞击焦炭颗粒在蒸汽/空气的速度可能达到非常高的速度。携带焦炭颗粒的高速蒸汽/空气流导致像对发射点的影响，并且其金属被除去侵蚀。

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