The pH value issue of the brine
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This post was last edited by sunjl1981 on 2013-1-6 at 20:10. Hello everyone, our company uses pipelines to transport brine. Recently, due to pipeline cleaning and the properties of the brine, the pH level was around 12, with high levels of sulfate ions, which caused us a series of problems. These issues mainly related to raw material consumption: the usage of barium chloride increased significantly, while the amount of sodium carbonate decreased and the calcium content dropped. However, through theoretical calculations, it was determined that the amount of barium chloride used could reduce the sulfate ion levels to normal values. Now the question is: in an environment with high alkalinity and high sulfate ion levels, should barium chloride react first with the sulfate ions? Could this lead to the formation of large amounts of barium hydroxide? Also, there is a rebound in sulfate levels after filtering out sulfates from the brine to obtain refined brine. What do fellow sea enthusiasts think about this? ? ， ， -
What is the material of the pipes used to transport brine? Are they steel pipes or non-metallic pipes?
We use fiberglass pipes.
We use glass fiber reinforced plastic pipes; as for the specific material model, I’m not aware of it, as it was designed by the chemical engineering institute and I wasn’t involved in that process, and I don’t have the relevant documents available.
This post was last edited by Yinozhang on 2011-3-13 09:38. The amount of barium chloride added only needs to be sufficient to reduce the sulfate concentration; there is no need to use an excessive amount, so the situation you described will not occur. Additionally, barium hydroxide is not a precipitate; BaSO4 will definitely form first. Could the rebound in the brine concentration you mentioned be due to analytical factors? As long as the sulfate level isn’t extremely high, there’s no major problem. It’s also possible that there is a large amount of BaSO4 precipitation at the bottom of your brine tank; in the solution, there exists an equilibrium: BaSO4 ⇌ Ba2+ + SO42-.
This post was last edited by Yino Zhang on 2011-3-14 at 16:55. The main issue now is that the sulfate level is extremely high – 18g; that’s still not excessive, but it’s impossible to control it. We’re facing a problem like no other: scaling has occurred in many pipelines, including those for salt dissolution pumps, heaters, and brine pipelines. The situation is very serious; the material consumption has reached 90 kg. We’re aware of all the theories mentioned by Flay, but there are many issues in actual production that are difficult to understand. It’s only after solving these problems that things become clear, haha. .