【Daily Question】Chemical Engineering Principles 351: Carbon Remover (March 30)
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This post was last edited by Zaihui Kangqiao on 2016-4-8 at 16:28. The Chemical Engineering Theory section is launching a \"One Question per Day\" activity starting today, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent series will include those on \"Principles of Chemical Engineering\", \"Mass Transfer and Separation\", \"Thermodynamics in Chemical Engineering\", and \"Chemical Process Engineering\". We hope you will give it your active support! Wishing everyone a happy Christmas! Answers to the questions in the \"One Question per Day\" activity can be viewed directly; the thread will be closed after 1 day ! To encourage everyone’s continued participation this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer question: How does the effectiveness of the carbon remover in removing carbon affect the quality of the desalinated water? Answer: Raw water generally contains large amounts of carbonates. After passing through a cation exchanger, the pH value of the water is usually below 4.5, and the carbonates are completely decomposed into CO2. This CO2 can be almost entirely removed by a decarburization unit, thereby reducing the total amount of anions that reach the anion exchanger. This lessens the load on the anion exchanger, allows the exchange capacity of the anion exchange resin to be utilized more fully, prolongs the operational life of the anion exchanger, and reduces alkali consumption ； At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. This is because when CO2 and HSiO3- are present in water simultaneously, during the ion exchange process, CO2 reacts with H2O to form HCO3-. HCO3- is more easily adsorbed by the anion exchanger than HSiO3-, which hinders the exchange of silicon and results in poor carbon removal. The more CO2 remains in the water, the more HCO3- is produced; this not only affects the efficiency of the anion exchanger in removing silicon but also increases the silicon and salt content in the deionized water.
Raw water generally contains large amounts of carbonates; after passing through a cation exchanger, the pH value of the water is usually below 4.5. The carbonates are completely decomposed into CO2, and this CO2 can be almost entirely removed by a decarburization unit. This reduces the total amount of anions that reach the anion exchanger, thereby lightening the load on it and allowing the exchange capacity of the anion exchange resin to be utilized more fully. As a result, the operating cycle of the anion exchanger is extended, and alkali consumption is reduced； At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. This is because when CO2 and HSiO3- are present in water simultaneously, during the ion exchange process, CO2 reacts with H2O to form HCO3-. HCO3- is more easily adsorbed by the anion exchanger than HSiO3-, which hinders the exchange of silicon and results in poor carbon removal. The more CO2 remains in the water, the more HCO3- is produced; this not only affects the efficiency of the anion exchanger in removing silicon but also increases the silicon and salt content in the deionized water.
Answer: Raw water generally contains large amounts of carbonates. After passing through a cation exchanger, the pH value of the water is usually below 4.5, and the carbonates are completely decomposed into CO2. This CO2 can be almost entirely removed by a decarburization unit, thereby reducing the total amount of anions that reach the anion exchanger. This lessens the load on the anion exchanger, allows the exchange capacity of the anion exchange resin to be utilized more fully, prolongs the operational life of the anion exchanger, and reduces alkali consumption； At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. This is because when CO2 and HSiO3- are present in water simultaneously, during the ion exchange process, CO2 reacts with H2O to form HCO3-. HCO3- is more easily adsorbed by the anion exchanger than HSiO3-, which hinders the exchange of silicon and results in poor carbon removal. The more CO2 remains in the water, the more HCO3- is produced; this not only affects the efficiency of the anion exchanger in removing silicon but also increases the silicon and salt content in the deionized water.
How does the efficiency of carbon removal by the carbon remover affect the quality of the desalinated water? Answer: Raw water generally contains large amounts of carbonates. After passing through a cation exchanger, the pH value of the water is usually below 4.5, and the carbonates are completely decomposed into CO2. This CO2 can be almost entirely removed by a decarburization unit, thereby reducing the total amount of anions that reach the anion exchanger. This lessens the load on the anion exchanger, allows the exchange capacity of the anion exchange resin to be utilized more fully, prolongs the operational life of the anion exchanger, and reduces alkali consumption ； At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. This is because when CO2 and HSiO3- are present in water simultaneously, during the ion exchange process, CO2 reacts with H2O to form HCO3-. HCO3- is more easily adsorbed by the anion exchanger than HSiO3-, which hinders the exchange of silicon and results in poor carbon removal. The more CO2 remains in the water, the more HCO3- is produced; this not only affects the efficiency of the anion exchanger in removing silicon but also increases the silicon and salt content in the deionized water.
Answer: Raw water generally contains large amounts of carbonates. After passing through a cation exchanger, the pH value of the water is usually below 4.5, and the carbonates are completely decomposed into CO2. This CO2 can be virtually removed using a decarburization unit, thereby reducing the total amount of anions that reach the anion exchanger. This lessens the load on the anion exchanger, allows the exchange capacity of the anion exchange resin to be utilized more fully, extends the operating life of the anion exchanger, and reduces alkali consumption； At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. Because when CO2 and HSiO3 are present in water, during the ion exchange process, CO2 reacts with H2O to form HCO3-. HCO3- is more easily adsorbed by the anion exchanger than HSiO3-, which hinders the exchange of silicon and results in poor carbon removal. The more CO2 remains in the water, the more HCO3- is produced; this not only affects the efficiency of the anion exchanger in removing silicon but also increases the silicon and salt content in the deionized water.
Raw water generally contains large amounts of carbonates; after passing through a cation exchanger, the pH value of the water is usually below 4.5. The carbonates are completely decomposed into CO2, and this CO2 can be almost entirely removed by a decarburization unit. This reduces the total amount of anions that reach the anion exchanger, thereby lightening the load on it and allowing the exchange capacity of the anion exchange resin to be utilized more fully. As a result, the operating cycle of the anion exchanger is extended, and alkali consumption is reduced； At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. This is because when CO2 and HSiO3- are present in water simultaneously, during the ion exchange process, CO2 reacts with H2O to form HCO3-. HCO3- is more easily adsorbed by the anion exchanger than HSiO3-, which hinders the exchange of silicon and results in poor carbon removal. The more CO2 remains in the water, the more HCO3- is produced; this not only affects the efficiency of the anion exchanger in removing silicon but also increases the silicon and salt content in the deionized water.
There are many of these. 1. Raw water generally contains large amounts of carbonates; after passing through a cation exchanger, the pH value of the water is usually below 4.5, and all the carbonates are decomposed into CO2 ； 2. CO2 can be essentially removed through a decarburizer, which reduces the total amount of anions entering the anion exchanger. This lessens the load on the anion exchanger, allows the exchange capacity of the anion exchange resin to be fully utilized, prolongs the operational life of the anion exchanger, and reduces alkali consumption ； 3. Since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. 4. This is because when CO2 reacts with H2O, carbonate is formed, and carbonate is more easily adsorbed by anion exchange resins than silicate, thereby hindering the exchange of silicate. 5. The carbon removal effect is poor; the more CO2 remains in the water, the more HCO-3 is produced. It not only affects the silicon removal efficiency of anion exchangers but also increases the silicon and salt content in the deionized water.
How does the efficiency of carbon removal by the carbon remover affect the quality of the desalinated water? Answer: Raw water generally contains large amounts of carbonates; after passing through a cation exchanger, the pH of the water is usually below 4.5, and all the carbonates are decomposed into CO2. CO2 can be almost completely removed through a decarburizer, which reduces the total amount of anions entering the anion exchanger. This lessens the load on the anion exchanger, allows the exchange capacity of the anion exchange resin to be fully utilized, prolongs the operational life of the anion exchanger, and reduces alkali consumption. At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. Because when CO2 and HSiO3 are present in water simultaneously, during the ion exchange process, CO2 reacts with H2O to form HCO3. HCO3 is more easily adsorbed by anion exchange resins than HSiO3, which hinders the exchange of silicon ； The carbon removal efficiency is poor; the more CO2 remains in the water, the more HCO3 is produced. This not only affects the silicon removal performance of anion exchangers but also increases the silicon and salt content in the deionized water.
How does the efficiency of carbon removal by the carbon remover affect the quality of the desalinated water? Answer: Raw water generally contains large amounts of carbonates. After passing through a cation exchanger, the pH value of the water is usually below 4.5, and the carbonates are completely decomposed into CO2. This CO2 can be almost entirely removed by a decarburization unit, thereby reducing the total amount of anions that reach the anion exchanger. This lessens the load on the anion exchanger, allows the exchange capacity of the anion exchange resin to be utilized more fully, prolongs the operational life of the anion exchanger, and reduces alkali consumption ； At the same time, since CO2 is removed, the anion exchange resin can remove silicic acid more thoroughly. This is because when CO2 and HSiO3- are present in water simultaneously, during the ion exchange process, CO2 reacts with H2O to form HCO3-. HCO3- is more easily adsorbed by the anion exchanger than HSiO3-, which hinders the exchange of silicon and results in poor carbon removal. The more CO2 remains in the water, the more HCO3- is produced; this not only affects the efficiency of the anion exchanger in removing silicon but also increases the silicon and salt content in the deionized water.