Saltwater suddenly emerged from the sludge discharge port on the preprocessor
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This post was last edited by sunjl1981 on 2013-1-6 at 19:59. Saltwater suddenly appeared at the sludge discharge port on the preprocessor; I’m not sure what the cause is. The salt content is 250 grams per liter, the iron ion concentration is 0.33 milligrams per liter, the pH value is around 12. The pressure in the pressurized dissolved air tank is about 0.22, and this value remains stable; the liquid level is also stable. Now we are using saltwater for circulation; no salt or ferric chloride has been added, and since there is very little sludge floating to the surface, sludge removal has not been carried out. Previously, when salt and ferric chloride were added, very little sludge floated to the surface; the concentration of ferric chloride was 1.15% # &
Is the pressure in the pressurized dissolved air tank always 0.22?
How did saltwater suddenly \"erupt\" from the sludge discharge port on the preprocessor? Please be more specific, Louzhu.
The problem with high salt concentration is that it’s more severe at the top than at the bottom; later on, the saltwater couldn’t flow downward. Things improved once normal operation was resumed. If that doesn’t work, lower the height of the overflow pipe – it’s best not to make any changes otherwise
The salt concentration in the brine is 250 grams per liter. The sodium chloride concentration in this brine is too low, making it an unsaturated brine. Within the preprocessor, due to differences in salinity, the brine with lower salt content is less dense and thus finds itself at the upper layer of the preprocessor, while the brine with higher salt content is at the lower layer. As a result, the brine with a low sodium chloride concentration flows out through the upper sludge outlet.
The original poster should explain how the leakage occurred
It could be: 1. The saltwater concentration is too low; it should be between 305 and 315 g/L. 2. The pH level is not properly controlled. It should be less than 11. 3. The thickness of the salt sludge layer in the preprocessor is too low. 4. Is the pressure released during floating within the normal parameters for process control? 5. Reverse order of calcium and magnesium. 6. Quality of raw salt. This post was last edited by limingshuguang on 2009-3-30 09:57
250g/l of saltwater – how did it end up in the processor? A fine will be imposed. If everything was working fine before, it’s definitely because the concentration of saltwater was too low. Someone has already explained the reason; is the person using refined salt? It seems that the iron content is a bit too high
Saltwater is coming out of the upper sludge discharge port. What does this mean? When discharging sludge from above, it’s necessary to close the saltwater outlet valve first; could it be that the outlet pipe is blocked or there’s a problem with the valve? Alternatively, there might be corrosion at the edge of the sludge tank in the preprocessor, which is causing the saltwater to leak out.
The main reason is that the NaCl content in the saltwater is too low; it should be that of saturated saltwater, which is between 300–310 g/l, while 250 g/l is too low
1. The saltwater concentration is too low; it should be between 305 and 315 g/L. 2. The pH value is not controlled properly. It should be between 9 and 11, with 10.3 being the most ideal. 3. The temperature of the saltwater should be controlled between 55-60 degrees. 4. Is the pressure in the pressurized dissolved air tank within the normal operational range? (For a capacity of 200,000 tons per year, the pressure should be around 2.5 MPa.) 5. Mg(OH)2 should be added first, followed by Na2CO3; the amount of alkali used must be between 0.1-0.3. 6. Iron levels must be kept at 0.1 to benefit the lifespan of your ion membrane. 7. The quality of the raw salt should be good. 8. Check whether the preprocessor saltwater overflow port is blocked.
Basically, it’s because the overflow pipe can’t handle the flow rate; perhaps the temperature is not high enough or the temperature difference is too large, leading to salt crystallization. It has nothing to do with anything else. Just use a hose to clear it. This post was last edited by pzhhuagong on 2009-3-30 16:50]