The Analysis of Bending Causes and Optimized Control Measures in Hydrogenation Air-Cooler System
The Analysis of Bending Causes and Optimized Control Measures in Hydrogenation Air-Cooler System
复制标题
加氢空冷器系统弯曲原因分析及优化控制措施
DOI：
10.1016/j.proeng.2015.12.310
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
K.X. Wang
中科院分区：
文献类型：
--
作者：
L. Sun;M. Zhu;H.Z. Jin;K.X. Wang
为了确定结垢来源和腐蚀类型，以某炼油厂加氢裂化反应器流出空气冷却器（REAC）弯管为对象进行工艺分析。利用CFD技术分析泥沙沉积过程，通过应力分析确定管材弯曲变形和失稳的临界条件。在此基础上，确定了空冷器系统弯曲变形的原因及针对性的控制措施。结果表明，加氢反应器出水冷却分离过程中存在H2S-NH3-H2O腐蚀体系，会导致H2S/H2的高温腐蚀和NH4HS溶液的冲蚀腐蚀。管端存在大量腐蚀产物，低流速时可能堵塞空气冷却器。在空冷系统中，当某些管道被堵塞时，温度和力的分布不均匀。一旦堵塞管道数量超过9根，管束就会发生灾难性的后果。为降低反应堆流出空气冷却器（REAC）系统弯曲变形失效风险，应延缓腐蚀产物的产生和沉积、增加注水量、加强循环氢脱硫以及优化REAC设计。
In order to confirm the source of fouling and corrosion type, the process analysis is conducted based on the bending tubes of hydro-cracking reactor effluent air coolers (REAC) in a refinery. The process of sediment deposition was analyzed by using the CFD technology, and the critical condition of bending deformation and instability of tubes was determined via stress analysis. On this base, reasons of bending deformation in air cooler system and the targeted control measures were determined. The results showed that corrosion system of H2S-NH3-H2O existing in the cooling and separation process of hydrogenation reactor effluent stream, which would result in high temperature corrosion of H2S/H2and erosion-corrosion of NH4HS solution. A large amount of corrosion products located at the end of tubes, which could block the air coolers when at a low flow velocity. In the air-cooler system, the temperature and force distribution were uneven when some part of pipes were blocked. Once the number of blocked pipes exceeds 9, the pipe bundles were diastrophic. The failure risk of bending deformation in reactor effluent air coolers (REAC) system could reduce, when the generation and deposition of corrosion products should be retarded, amount of water injection should be increased, desulfidation in recycle hydrogen should be strengthened and the design of REAC should be optimized.
反应堆流出空气冷却器故障分析
影响因子：
4
作者：
Ou, Guofu;Wang, Kuanxin;Jin, Haozhe
通讯作者：
Jin, Haozhe