上流式厌氧污泥床反应器的腐蚀与防护

摘要

由于上流式厌氧污泥床（UASB）内发生的反应主要属于化学过程和生物过程，因此UASB反应器内壁极易发生腐蚀，从而影响反应效果，降低设备使用寿命，增加维护费用。在分析了上流式厌氧污泥床反应器的结构与工艺对腐蚀的作用的基础上，讨论了腐蚀机理，提出了应在改进防腐设计、采用耐腐蚀材料和对设备进行防腐处理等3个方面采取措施，从而防止UASB反应器内的腐蚀现象。%Because of the chemical and biologicalre actions in an up-flowanaerobic sludge blanket (USRB) reactor, the inner surfaces of the UASB reactor are easy to corrode, so that the reaction efficiency and the service life of the reactor are decreased and the maintenance cost is increased. In this paper, based on the analysis of the effects of the structure of UASB reactors and the processes of reactions on corrosion, the corrosion mechanism is discussed, and three measures to prevent the corrosion of the UASB reactor are presented, I.e., improvement of the anticor rosion design, application of anticorrosion materials and preservative treatment of the equipment.