The saline pretreater does not use compressed air

It’s not a preprocessor with compressed air; it’s a dissolved air tank. Compressed air is used to separate the flocs that form after adding ferric trichloride to the saltwater through air flotation

What problem? Is it the Gore membrane process? How do I start it without air flotation? Are you testing elementary school students?

I’ve tried it; it’s the KAI membrane process, and without compressed air, the clarity of the brine produced by the preprocessor is very poor.

Friend: handshake. In fact, it’s completely possible to stop supplying air once it’s determined whether there are high levels of magnesium salts or calcium salts present. We’ve conducted experiments on this, but ferric chloride still needs to be added. Last edited by tengfei on 2009-2-7 01:50.]

There is no flotation effect; the separation speed is too slow, so the results will definitely be poor

What about the practices in laboratories? Can you tell how to control the quality of raw salt? Can you guarantee that the samples taken will be problem-free? In large production systems, it is almost impossible to function without compressed air! This post was last edited by limingshuguang on 2009-2-9 11:05.]

If it exists, it can’t be said with absolute certainty; I wouldn’t say so if I hadn’t seen it. Some manufacturers have already managed to achieve this without the need for additional elements, and the results are excellent. The quality of their raw salt is very stable, but it becomes unstable when compressed air is added, and the pretreatment effect is poor

Refer to our company’s training materials: 2.5 Preprocessor; 2.5.1 Principle of preprocessor separation. When air is dissolved in brine under certain pressure, and then the pressure on this brine is suddenly reduced, the gases dissolved in the brine form tiny bubbles that are released. Under the action of flocculants, these bubble-covered impurity particles stick together with other impurities present in the brine. As a result, the apparent density of these particles decreases, and the forces acting on them in the brine enable them to rise upward at a certain speed and be discharged. A small amount of salt sludge settles at the bottom of the tank and is discharged from there. 2.5.2 The effectiveness of the preprocessor depends mainly on the adhesion of impurity particles to the bubbles. This adhesion process is determined by four stages: refinement reaction, pressure-induced dissolution, pressure-release, and adhesion aggregation; regular sludge removal is also a key factor affecting the clarification effect.

No compressed air is introduced into the pressurized container; when ferric trichloride is added to the saline solution, the sludge finds it difficult to rise to the surface, which hinders the proper operation of the downstream system.

I would like to ask the original poster: does the sediment that is formed mainly float to the surface or sink to the bottom, or is it filtered directly? A large plate and frame filter should be added after the pretreatment stage. I think the retention time can be increased, for example by adding a few more tanks for clarification ； Or increase the preprocessor and reduce the traffic to achieve what you mentioned. What are the components of crude salt?