Can the waste acid and waste alkali generated after the regeneration of the resin column be completely neutralized?
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This post was last edited by sunjl1981 on 2013-1-6 20:25. Can the waste acid and waste alkali resulting from the regeneration of the resin tower be completely neutralized? If it cannot be completely neutralized, what property should it have? I hope to give a simple explanation! This post was last edited by limingshuguang on 2009-2-8 13:42 ] # ， ， &
The waste acid and waste alkali resulting from the regeneration of the resin column cannot be completely neutralized; it should remain alkaline.
Not necessarily; the acidity of chlorine-based processes and the alkalinity of Beijing Chemical Machinery processes mean that making appropriate adjustments to the levels of acidity and alkalinity has little impact on the regeneration effect.
The amount of base used for regeneration must be excessive; it’s impossible for acid and base to reach equilibrium. If acidity occurs, problems will arise
Our resin column is more acidic due to different regeneration conditions, resulting in a higher acid content.
This question is difficult to answer; it’s not possible to achieve neutrality. Moreover, there are cases where regeneration occurs in larger quantities. Last edited by limingshuguang on 2009-2-8 at 13:46.]
Asahi Kasei’s product is likely alkaline, mainly based on the regeneration conditions and methods of the resin tower
Ours seems to be basically neutral, but it hasn’t been fully collected together for analysis. Hehe.
It won’t achieve balance, and a large enough tank is required. Our neutralization tank is small; before the alkali-regenerated water arrives, the tank already gets full, so we have to keep adjusting it by adding alkali and acid back and forth, just like when mixing dough – if there’s too much dough, add water; if there’s too much water, add dough: lol. The pH level needs to be maintained at 8-9, and that comes at a high cost, ugh:L
According to the regeneration conditions, acid is added first and then alkali during regeneration; the molar amount of alkali is higher than that of acid, so it should be alkaline.
It’s not necessarily possible to achieve complete neutralization. If you put something into a storage tank, it’s best to have a mixing system, such as compressed air. Otherwise, the acid and alkali will not be completely neutralized; since acid cleaning is done first and then alkali cleaning, there will be an acidic layer at the bottom of the tank, with a partially neutral layer in between, and an alkaline layer on top.
We are Woody Craft. It can basically neutralize it. It is generally slightly alkaline, and the saline solution is prepared to be slightly alkaline to saline in nature. Also, different processes are determined based on the amounts of acid and base. It doesn’t have to be alkaline. Because after pickling, it is necessary to rinse with saline (pure water) and then regenerate with alkali; excessive alkali is not always required. We regenerate in excess; the acid level doubles, and the regeneration wastewater is definitely acidic. This post was last edited by limingshuguang on 2009-2-8 13:50]
If Asahi Kasei requires an alkaline environment according to the process specifications, after the recycled wastewater is collected, it is stirred, and the pH ends up at around 12
It depends on the amount of acid and alkali used for the regeneration of your resin tower; the specific results can be roughly calculated. Of course, the prerequisite is that the waste acid and waste alkali are completely neutralized. Our company uses equipment from Beihua Machinery. At that time, we wanted to carry out this neutralization process; calculations showed that the pH of the solution after complete neutralization would be around 9. However, in practice, when waste acid and waste alkali were mixed in the same tank for neutralization, complete neutralization could not be achieved, and the pH often ended up being above 11. Adding another large mixing tank should work; the water after neutralization can be sent to the brine solution for reuse.
We use the Asahi Kasei process; as a result, the reclaimed water cannot be completely neutralized and remains alkaline. Fortunately, our waste acids and wastes alkalis can be put to use by being mixed with other wastewater for neutralization and adjustment, so there is no waste – instead, they become a resource.
It should be possible to neutralize it, because during regeneration, the resin is first replaced with H+ ions, and then with Na+ ions; both of these ions have the same valence, which is +1. During design, the multiple of excess acid or base is the same; therefore, within a completed regeneration cycle, the waste liquid should be neutral
We use the Asahi Kasei process; the reclaimed water cannot be completely neutralized and remains alkaline. I wonder what would happen if it were sent to a saltwater facility for desalination
Not necessarily; I’ve calculated that the resin tower using Asahi Kasei’s ion exchange membranes is slightly acidic. You can do the calculation: the acid regeneration flow rate is 1020 L/h, and the time is 45 minutes ； The alkali regeneration flow rate is 470 L/h, with a duration of 90 minutes.
Ours uses the Asahi Kasei process and is alkaline.
Depending on the process, either acids or bases may be used, depending on the type of resin you are using. The process of Beihua Machinery results in an alkaline environment after acid-base neutralization.