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当冷库的制冷装置需要进行大修或增装自控元件时,经常碰到的问题是阀门关闭不严,系统抽真空困难。氨味太浓无法进行施工。怎样抽尽系统内的氨气就成为施工中的关键工作。经多年的实践,我们是采用不断抽空的方法。我厂有两座冷库,一座4500吨建于1958年,69年进行过大修。另一座6000吨建于1973年,75年投产。过去由于管理不善,不注重维护保养,不少的设备、管道、阀门绣蚀严重,隔热层受潮结冰脱落。因此,83年7月间主管部门巴批准我厂4500吨库停产进行大修。但经
When the cold storage refrigeration unit needs overhaul or additional control components, often encountered the problem is the valve is not closed, the system vacuum difficult. Ammonia is too thick for construction. How to exhaust the ammonia gas in the system has become a key task in construction. After many years of practice, we adopt the method of continuous evacuation. I plant has two cold storage, a 4500 tons built in 1958, 69 were overhauled. Another 6000 tons built in 1973, 75 years put into production. In the past due to poor management, do not pay attention to maintenance, many of the equipment, pipes, valves, embroidery serious insulation damp icing off. Therefore, in July 83, the competent authorities approved the overhaul of 4,500 tons of warehouses in our factory. But after