Ammonium Salt Deposition Characteristics in an Air Cooler System Based on the Coupling of Fluid Flow and Heat Transfer Simulation

作者：Jin Haozhe,Zhou Junfeng,Liu Wenwen,Liu Xiaofei,Ou Guofu

摘要：The ammonium salt corrosion is a typical failure mode for the hydrogenation reaction effluent air cooler(REAC) system. In order to investigate the corrosion characteristics in the REAC system, numerical simulations were performed by using the mixture model, the heating transfer model, and the particles tracking model. The results show that the differences between the temperature and the velocity at each cross section of the first-row and second-row tubes are small. The inertia of the particles plays an important role in the particle’s deposition, and the smaller particles distribute more uniformly in the air cooler. However, for larger particles, they prefer falling from the inner side of the vertical elbow, and preferentially depositing at the inlet header and pipes before saturation. In the heat exchanger tubes, the particle deposition number is larger in the second-row tubes than that in the first-row tubes, and the high-risk tubes mainly concentrate on the middle and right side of the air cooler. The kinetic parameters of the particles are in accordance with the blocking-prone position in many real operating conditions.

發文機構：The Institute of Flow-Induced Corrosion The Insititute of Flow-Induced Corrosion and Intelligent Precaution and Control

關鍵詞：HYDROGENATIONairCOOLERMULTIPHASEflowAMMONIUMsaltcorrosionparticlesDRIFTING

分類號： TG1[金屬學及工藝—金屬學]