Regarding the brine reaction tank

The square shape facilitates civil engineering construction, ensures complete sedimentation, and makes separation easier； The pipe can only be accessed from the middle; otherwise, silt easily blocks the pipe ； Yes, but you need to consider using a slurry pump

Reply to 1# Chasing the Sun: 1. Why were these pools designed to be square? Why not cylindrical? Would it be easier to stir if it were just cylindrical in shape? A square-shaped pool is convenient for stirring, while a circular one is not conducive to it. This is because the cross-sectional area of the front reaction tank is very large, making it difficult to achieve uniform mixing. When the stirrer rotates, the water at the center of the tank is pushed downward and outward, while it rises from the walls of the tank. In a circular shape, turbulence does not occur, allowing the entire mixture to rotate as a single unit without the materials colliding with each other. In many cases, especially when the material is in a solid-liquid phase, the shape of the mixing tank is altered to achieve uniform mixing; for example, it can be designed as quadrilateral, hexagonal, octagonal, etc. 2. Why must the pipe enter from inside the pool and reach the bottom? Why not enter from outside the pool and go underground before reaching the inside of the pool? Is it the fear that freezing in winter will cause cracks and make maintenance difficult, or is it concern that the quality of the pool itself will be affected? If that’s the case, then why isn’t iron or some other material used for the pool? Why is cement-based coating preferred? Regarding the issue of sealing, you know, the entire pool needs to be made waterproof – it should not allow water to escape from inside, nor should it allow water to enter from outside. Therefore, the entire pool has to be poured as a single unit in one go, and it is also necessary to apply waterproofing and anti-corrosion layers, such as water glass or epoxy glass flake coatings. Creating holes in concrete to install metal pipes actually makes leaks very likely to occur, as steel corrodes faster than cement; over time, leaks are bound to appear at the joints. From this, you might ask why not use an iron plate; actually, it’s possible to use steel as well. However, since it’s buried underground, a reinforced concrete structure is also needed around the steel reactor tank to hold it in place. Otherwise, the deformation pressures from the ground would destroy the iron tank, which would mean redundant investment and no real sense in doing so. As for other materials, which one do you say is cheaper? 3. I have a suggestion; I’m not sure if it can be used? These past two days we’ve been using manual methods to pump water, as the low water level makes it difficult to use pumps. Could the bottom of the tank be designed at an appropriate angle so that water can flow from higher to lower levels? Or could there be a small pit in the center of the bottom to facilitate the operation of self-priming pumps? Another option would be to design the tank with a conical bottom; this would make it easier to inspect the tank in the future. Otherwise, it will be troublesome to check for leaks. This is indeed a good suggestion. Leaving a drainage well at the bottom will cause the salt sludge to settle there; when you need to clean it later, you’ll have to dig out that settled sludge from the drainage well, and that’s not an easy task either. It’s a good idea to make the bottom of the pool sloped. Conical shapes, like those of drainage wells, are not desirable. I do have a suggestion for you: if you have a vacuum pump, it would be easier to use vacuum to suck out the water.

Does one need a reason for doing something wrong? You said the issues mentioned were things that the design institute had already taken into account

I have another question: when there is too much sediment in this reaction tank, sludge is formed, which will surely increase the load on the mixing engine or on the equipment that follows. Is there a better way to remove this sludge? Does this reaction tank need to be cleaned on a regular basis? Should humans be used for cleaning? Would that have an impact on production in terms of time? Is there any equipment that can separate good brine from the sediment, so that the water pumped by the intake pump is pure, treated brine, while the sediment can be transported to a salt sludge tank using a vacuum pump or other devices?

I haven’t heard of cleaning the reaction tank. Usually, when cleaning the salting tank, under stirring conditions, the sediment is drawn away along with the liquid, so not much sediment remains. Of course, if that situation does occur, then the tank is drained and cleaned. I’ve been using the salt tank here for two years without cleaning it, and I really can’t stand it anymore; I plan to use a different tank next time I park my car.

Reply to 6# flay0303: Hehe, after the salt in that salt-removal tank we used ran out, there was a big hole there. Hehe, how much salt do you mean ran away? And how often does it need to be cleaned?

The cleaning time depends on the type of salt used; generally, cleaning becomes necessary when the concentration in the salt pond reaches a level that is no longer acceptable

Reply to 5# Chasing the Sun size=3> What reaches the reaction tank is saturated saltwater that has overflowed; even if there is some sediment, it’s very little, and it can be easily pumped away. It can be said that your assumption is unfounded. Moreover, the mixing blades are at a certain distance from the bottom of the tank; even if there is sediment, its impact is minimal. If it is not used for a long time and not cleaned promptly, deposits will form, but stirring it after adding water will resolve the issue. Also, you said that situations affecting production would not occur, as major overhauls are carried out every year. If it is indeed necessary to use a conveyor belt with brine, vacuum pumps consume a lot of energy; in such cases, chemical-resistant pumps will suffice. As for the specific type of pump to be used, that information is kept confidential, as different companies use different ones.

For the pre-reaction tank used with brine, underground tanks are generally employed; there can be either a single tank or multiple tanks connected in series or parallel. The brine coming out of the underground salt dissolving tank is fed into the pre-reaction tank after sodium hydroxide is added to it via a baffled tank. The purpose of this reaction is to produce magnesium hydroxide. Since the magnesium content in raw salt is very low – even the worst sea salt in Shandong does not exceed 0.3% – the proportion of solids formed here in the brine is very small, not exceeding 2%. Moreover, magnesium hydroxide exists in a colloidal state and does not settle easily; driven by stirring, these solids are pumped along with the brine into the dissolved air tank. So the original poster doesn’t need to worry about this. As for the hole in the salt dissolving tank, well, that’s due to natural disasters or human errors – there’s nothing that can be done about it. Just make sure to build a solid foundation during the next construction phase. The geological conditions along coastal marshes are poor; conditions such as flowing sand and silt can cause the equipment foundations to settle. This falls under the category of civil engineering; it’s not something that ordinary employees can handle. Many factories use anti-corrosion tiles to line the inner walls of salt storage tanks in order to resist wear caused by raw salt. This method is actually quite good; it’s better than using glass flake coatings. It is just that the requirements for construction quality are quite high.

I found it extremely useful after reading it; even a small salt dissolving tank contains so much knowledge