论文部分内容阅读
林德低温甲醇洗水分离器的气、液两相中 H_2S 浓度对设备腐蚀应力有很大的影响,对设备的安全运行、设备的材质选择、管道焊接工艺的选择以及设备运行温度的控制等诸多方面有较高的要求。而林德低温甲醇洗在化肥工业中普遍采用,水分离器是整个林德技术中湿 H_2S 浓度最高的设备,运行稳定性和安全性对整个工艺系统有重要影响。讨论了湿 H_2S 腐蚀机理;金属材料的吸附作用对腐蚀的影响,焊缝及焊接热影响区对腐蚀的敏感性,对设备的材料、焊缝进行了分析,并从设计、制造、使用,预防腐蚀合理选材等方面提出了建议和改进措施。
The H_2S concentration in gas and liquid two phases of Linde cryogenic methanol water separator has a great influence on the corrosion stress of the equipment. The safe operation of the equipment, the material selection of the equipment, the selection of the pipeline welding process and the control of the operating temperature of the equipment Many aspects have higher requirements. Linde’s low-temperature methanol washing is widely used in the fertilizer industry. The water separator is the highest concentration of wet H 2 S in the whole Linde technology. The operation stability and safety have an important influence on the whole process system. The mechanism of wet H 2 S corrosion, the effect of metal adsorption on corrosion, the sensitivity of weld and HAZ to corrosion were discussed, and the materials and weld of equipment were analyzed. The design, manufacture, use, prevention Corrosion and other aspects of reasonable selection of recommendations and improvement measures.