硫酸銨過程中異常怎么辦？
What should I do if there is any abnormality in the production process of ammonium sulfate?
某公司的熱動力廠以污氨水為吸收劑吸收鍋爐煙氣中的SO。生成亞硫酸銨，亞硫酸銨溶液再經(jīng)過空氣氧化、蒸發(fā)濃縮、降溫結(jié)晶、離心分離等工序出硫酸銨產(chǎn)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.
硫酸銨過程中出現(xiàn)各種異常情況，對于此類異常該怎么辦？
There are various abnormalities in the production process of ammonium sulfate. What should be done about such abnormalities?
1、在硫酸銨的工藝過程中，硫酸銨溶液循環(huán)時(shí)會產(chǎn)生大量的泡沫，并從容器人孔處溢出，造成嚴(yán)重的跑冒浪費(fèi)；
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、硫酸銨溶液降溫結(jié)晶后，晶粒細(xì)小，不能和母液分離，并隨母液穿過濾網(wǎng)進(jìn)入母液槽，工藝上得不到硫酸銨產(chǎn)品等問題，嚴(yán)重影響了氨法脫硫裝置的正常運(yùn)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.
硫酸銨過程中出現(xiàn)異常的原因
Causes of abnormality in ammonium sulfate production
1、泡沫產(chǎn)生的原因：污氨水中 COD高是導(dǎo)致硫酸銨溶液產(chǎn)生大量泡沫的主要原因，在硫酸銨過程中，無論氨水濃度多少、溫度高低，激烈攪拌和空氣鼓動都不會產(chǎn)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.
硫酸過程異常處理：針對硫酸銨過程中產(chǎn)生的泡沫可以添加消泡劑進(jìn)行處理。
Abnormal treatment of sulfuric acid production process: defoamer can be added to treat the foam produced in the production of ammonium sulfate.
2、硫銨晶粒細(xì)小原因：硫酸銨溶液中水不溶物含量增加時(shí)，這種細(xì)小晶體和母液形成糊狀粘稠物的現(xiàn)象更明顯。硫銨晶粒就會細(xì)小。氨水吸收煙氣脫硫時(shí)，系統(tǒng)中帶入了大量煙氣粉塵，當(dāng)硫酸銨溶液中粉塵累積到一定量時(shí)，結(jié)晶的硫酸銨晶體就不再長大，變?yōu)榧?xì)小晶體糊狀黏稠物了。
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.
硫銨晶粒細(xì)小解決對策：硫酸銨晶粒細(xì)小、黏稠，與母液無法分離問題可通過提高鍋爐煙氣除塵效率、降低煙氣中粉塵含量來解決。
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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