Precautions for the brine purification process
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This post was last edited by sunjl1981 on 2013-1-6 23:13. Dear sea friends, I have been researching the secondary brine purification process recently. Anyone who has information related to the analysis of this process would be greatly appreciated! ， ， -
The brine delivered from the brine production section enters the brine storage tank (V-110). The primary brine pump (P-114 A/B) transports the primary brine, along with the liquid feed supplied by the bulk feed pump (P-134A/B), to the brine filter (F-140A/B/C) where it is continuously filtered to remove suspended solids from the brine. The filtered brine, after having its pH value adjusted with pure acid, enters the filtered brine storage tank (V-150). After free chlorine is removed by filtering the brine with a sodium sulfite solution, it is fed into the resin towers (T-160A/B/C) via the brine pump (P-154A/B) to further remove calcium and magnesium ions from the brine, after which it enters the secondary refined brine tank (V-170). The secondary brine is pumped to the electrolysis process by the secondary brine pumps (P-174A/B). Before being put into use, the saline filter (F-140A/B/C) is pre-coated by using a pre-coating pump (P-124) to inject the pre-coating solution from the pre-coating tank (V-120) into the filter; it is then put into operation after successful pre-coating. Backwashing is performed when the filter meets the backwashing conditions. The filtered brine in V-150 is pumped by pump P-158 into the filter, where compressed air is used to backwash it; the resulting turbid liquid is discharged into the sludge tank (Z-144). The resin tower needs to be regenerated regularly using caustic soda and high-purity hydrochloric acid, and the entire regeneration process is automatically controlled by a program controller PLC according to predefined procedures. The backwash water from the resin tower is discharged into the sludge tank (Z-144) via the resin catcher (N-164), while the regeneration waste liquid goes into the waste liquid tank (V-165).
Secondary brine purification is really simple for us; the filter no longer needs to be used, so the most important thing is to operate the ion exchange resin tower properly.
For the secondary brine, it is mainly sufficient to properly control the regeneration of the resin tower, as well as to neutralize and recycle the wastewater