Does the size of the pre-reaction tank affect brine?
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This post was last edited by sunjl1981 on 2013-1-6 21:27. Does the size of the pre-reaction tank affect the quality of brine? # + + . hcbbs
This post was last edited by tclvjian on 2011-12-26 at 14:00. It has an impact, mainly due to the residence time of the reaction.
The volume of the reaction tank here is approximately 150 cubic meters, and the flow rate into the pretreater is around 220 cubic meters. Is it related to this that the reaction residence time is short and the magnesium content in the pretreater is high?
This post was last edited by tclvjian on 2011-12-26 at 14:04; the retention time should be sufficient. There are many reasons for the poor magnesium removal efficiency of the preprocessor. The quality of raw salt, the control of excess alkali, the pressure of compressed air, the efficiency of gas dissolution, the liquid level in the pressurized gas dissolution tank, the amount of ferric chloride added, the color of the floating sludge, as well as the structure of the pretreatment unit and its design capacity, among other things.
The order of entry and exit is sufficient; whether it is mechanical stirring or process air stirring – in a tank of this size, severe mixing back can occur, so the inlet and outlet designs need to be proper
This post was last edited by tclvjian on 2012-1-18 at 14:41. Our previous reaction tank was an underground tank with mechanical stirring; the outlet of the pressure pump was connected to a water intake tank.
If the pre-reactor is too small, the saltwater does not stay there long enough; as a result, the caustic soda added in the baffled tank does not have sufficient time (30–45 minutes) to react with the magnesium ions in the saltwater and form precipitates. This reaction continues to take place within the pretreater, leading to poor pretreatment results, which in turn increases the filtering load on the filters that follow.
The volume of the pre-reaction tank is small, so the sodium carbonate added cannot dissolve completely. Over time, a thick layer of calcium deposits forms at the bottom of the tank and on the stirrers, which hinders production.