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一、前言我国化工、制药等工业企业的致冷蒸发器,通常用液态氨作冷却剂,淡水或盐水作循环冷却水。使用盐水可降低水的冰点,以获得温度较低的冷却水,但盐水具有相当强的腐蚀性,常使设备产生局部腐蚀,导致停机、停产,造成重大的经济损失。济宁抗生素厂动力车间有平台氨致冷盐水蒸发器,为防止和减缓腐蚀,延长设备的使用寿命,对该蒸发器采取了牺牲阳极阴极保护措施。
I. Introduction China’s chemical, pharmaceutical and other industrial refrigeration evaporator, usually with liquid ammonia as a coolant, fresh water or brine for cooling water. The use of salt water reduces the freezing point of water to obtain colder cooling water, but the brine is rather corrosive and often causes localized corrosion of the equipment resulting in downtime and downtime, resulting in significant economic losses. Jining antibiotic plant power plant ammonia cooling brine evaporator, in order to prevent and mitigate corrosion, extend the service life of the equipment, the evaporator has taken sacrificial anode cathodic protection measures.