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1 前言近年来,我厂生产的硫铵产品质量很不稳定,产品颜色变为浅天蓝色,而且随着生产的继续,颜色逐渐变为蓝褐色。至1997年5月,已几乎不能生产白色的合格硫铵产品,用户意见很大。特别是各复合肥厂认为变色硫铵会影响其复合肥的质量。为生产出白色的合格品硫铵,满足用户要求,我们对工艺进行了改进。 2 硫铵产品变色的原因在洗氨的过程中,煤气中的一些物质会随氨一起被洗下来,如焦油、吡啶、萘等,另有部分
1 Introduction In recent years, the quality of ammonium sulfate produced by our factory is very unstable. The color of the product becomes light sky blue, and as the production continues, the color gradually turns blue-brown. As of May 1997, almost can not produce white qualified ammonium sulfate products, users have great opinions. In particular, the compound fertilizer plant that color change ammonium sulfate will affect the quality of its compound fertilizer. To produce white qualified ammonium sulfate, to meet user requirements, we have improved the process. 2 ammonium sulfate product discoloration causes In the process of ammonia washing, some of the gas in the gas will be washed down with ammonia, such as tar, pyridine, naphthalene, and others