硫酸铵生产过程中异常怎么办？
What should I do if there is any abnormality in the production process of ammonium sulfate?
某公司的热动力厂以污氨水为吸收剂吸收锅炉烟气中的SO。生成亚硫酸铵，亚硫酸铵溶液再经过空气氧化、蒸发浓缩、降温结晶、离心分离等工序生产出硫酸铵产品。
The thermal power plant of a company uses waste ammonia water as absorbent to absorb so in boiler flue gas. Ammonium sulfite is generated. The ammonium sulfite solution is then oxidized by air, evaporated and concentrated, cooled and crystallized, and centrifuged to produce ammonium sulfate.
硫酸铵生产过程中出现各种异常情况，对于此类异常该怎么办？
There are various abnormalities in the production process of ammonium sulfate. What should be done about such abnormalities?
1、在硫酸铵的生产工艺过程中，硫酸铵溶液循环时会产生大量的泡沫，并从容器人孔处溢出，造成严重的跑冒浪费；
1. In the production process of ammonium sulfate, a large amount of foam will be produced during the circulation of ammonium sulfate solution, which will overflow from the manhole of the container, resulting in serious emission and waste;
2、硫酸铵溶液降温结晶后，晶粒细小，不能和母液分离，并随母液穿过滤网进入母液槽，工艺上得不到硫酸铵产品等问题，严重影响了氨法脱硫装置的正常运行。
2. After cooling and crystallization of ammonium sulfate solution, the crystal grains are small and cannot be separated from the mother liquor, and enter the mother liquor tank with the mother liquor through the filter screen. The process can not obtain ammonium sulfate products, which seriously affects the normal operation of the ammonia desulfurization environmental protection device.
硫酸铵生产过程中出现异常的原因
Causes of abnormality in ammonium sulfate production
1、泡沫产生的原因：污氨水中 COD高是导致硫酸铵溶液产生大量泡沫的主要原因，在生产硫酸铵过程中，无论氨水浓度多少、温度高低，激烈搅拌和空气鼓动都不会产生泡沫。
1. Causes of foam: the high COD in the sewage ammonia water is the main reason that causes a large amount of foam in the ammonium sulfate solution. During the production of ammonium sulfate, foam will not be produced regardless of the concentration of ammonia water, the temperature, the intense agitation and the air agitation.
硫酸生产过程异常处理：针对硫酸铵生产过程中产生的泡沫可以添加消泡剂进行处理。
Abnormal treatment of sulfuric acid production process: defoamer can be added to treat the foam produced in the production of ammonium sulfate.
2、硫铵晶粒细小原因：硫酸铵溶液中水不溶物含量增加时，这种细小晶体和母液形成糊状粘稠物的现象更明显。硫铵晶粒就会细小。氨水吸收烟气脱硫时，系统中带入了大量烟气粉尘，当硫酸铵溶液中粉尘累积到一定量时，结晶的硫酸铵晶体就不再长大，变为细小晶体糊状黏稠物了。
2. Reason for fine grain of ammonium sulfate: when the content of water-insoluble substance in ammonium sulfate solution increases, the phenomenon that such fine crystal and mother liquor form paste like viscous substance is more obvious. The grain size of ammonium sulfate will be fine. When ammonia water absorbs flue gas desulfurization, a large amount of flue gas dust is brought into the system. When the dust in the ammonium sulfate solution accumulates to a certain amount, the crystalline ammonium sulfate crystal will not grow and become a fine crystal paste.
硫铵晶粒细小解决对策：硫酸铵晶粒细小、黏稠，与母液无法分离问题可通过提高锅炉烟气除尘效率、降低烟气中粉尘含量来解决。
Solution to the fine grain size of ammonium sulfate: the problem that ammonium sulfate is fine and viscous and cannot be separated from the mother liquor can be solved by improving the dust removal efficiency of boiler flue gas and reducing the dust content in the flue gas.
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