Who can tell me the discharge point and water quality of soda ash wastewater?
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Which kind soul can tell me the discharge point and water quality of soda ash wastewater?
What kinds of wastewater are generated from soda ash production? The cooling water from the water tank is pumped into the circulating water system; it is cooled in the cooling tower and then reused. There’s also water used for cleaning the towers, for which a recovery pool has been built for recycling. What else is there?
Impure water such as calcined condensate is recovered via an ammonia stripping tower and then used as filtration wash water, re-entering the mother liquor system
The cooling water from the water tank isn’t wastewater; it is recycled at the water circulation system. Wastewater is mainly: Crystallizer washing water and washing water during maintenance of equipment storage tanks, ammonia-containing filler water for ice machines, oil-containing sewage from operating equipment, etc.
The main sources of wastewater from soda ash plants are surface runoff, dust removal water from foam towers, and discharge water from the three-stage compression tower (excluding cases where indirect cooling is achieved via bellows)
Reply to 6# machun*ao: According to the production process, the wastewater from soda ash production via the ammonia-soda process is mainly distillation waste liquid. Its main component is calcium chloride, while the residue is calcium carbonate
The cleaning water for the crystallizer can be stored in a cleaning tank, or pumped into an empty tank; it can then be fed into the system when there isn’t enough water available. However, only a limited amount should be added at one time, otherwise it may affect the composition of the system’s water content. The condensate from excess steam generated during calcination is not contaminated and can be directly discharged into the drain. As for the cooling water used for other equipment, it should be possible to recycle it within a circulating water pond (after cooling it down for reuse)