How to adjust when the absorbed acid concentration increases or decreases?

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The highest absorption of SO3 and the best absorption efficiency are achieved when the acid concentration used for absorption is 98.3%. Either too high or too low a concentration of the absorbing acid will affect the absorption rate and the appearance of the exhaust gases; therefore, the concentration of the absorbing acid needs to be maintained between 98.3% and 98.8%. Measures to take when the acid absorption concentration is too high: 1. Open the safety valve to reduce the sulfur dioxide concentration in the flue gas ； 2. Open the water supply valve wider to increase the amount of water added ； 3. Increase the amount of acid used; measures to address low acid absorption concentration: 1. Contact the smelting facility to increase the amount of material fed in, thereby raising the sulfur dioxide concentration in the flue gas ； 2. Close the water supply valve to stop adding water ； 3. Reduce the amount of cross-acidification. Source: \"Modern Guidelines for Sulfuric Acid Production Operations and Technology\"