What are some good methods for heat recovery from distillation waste liquid in the ammonia-soda process?
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What are some good methods for heat recovery from distillation waste liquid in the ammonia-soda process?
In the ammonia-soda process, heat recovery from distillation waste liquid is generally achieved through primary and secondary flashing, with the recovered heat being utilized directly. The heat from the first flash goes into the distillation column; the heat from the second flash goes into the dilute solution tower
The ammonia-soda process increasingly employs vacuum distillation or dry lime-addition distillation technologies, as well as flash evaporation of distillation waste liquid, to reduce steam consumption during distillation and recover low-pressure steam； The combined soda process often employs high-efficiency weak liquor distillation towers to reduce the steam consumption in weak liquor distillation. Here is a paper on the distillation of weak soda liquor for your reference. http://www.chinacp.org.cn/newcn/chinacp/22%20of%20nitrogen%20fertilizer.htm