Because of the reasons that hydrazine is flammable and explosive ,slowly reacts with oxygen ,toxic ,etc .,it is substituted by acetone oxime as deoxidant in Yinjin Branch of Chongqing Natural Gas Purification Plant General .Analysis results show that the acetone oxime has better deoxidization effect and lower toxicity than hydrazine ,and it does not affect the water vapor system ,so that it can protect the equipment and has inhibit effect .Further more ,acetone oxime can also reduce the production cost ,therefore ,it is more economical and practical .%重庆天然气净化总厂引进分厂原来在锅炉给水系统中一直使用联氨作为除氧剂，但由于联氨易燃易爆、除氧速度慢、具有毒性等原因，则采用丙酮肟代替联氨进行除氧。分析使用丙酮肟除氧后的数据，丙酮肟较联氨而言，除氧效果更好，毒性更低，不影响水汽系统，对设备有保护作用和缓蚀效果，并减少了生产成本，更具有经济效益和实用性。
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