【Daily Question】Chemical Engineering Principles 275: Boiler Feed Water Quality Control (December 26)
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This post was last edited by Zaihui Kangqiao on 2016-4-8 at 16:12. 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! You get 3 wealth rewards just for participating, and an additional 4 wealth points for correct answers~~~ Short answer question: What are the methods for adjusting the quality of boiler feedwater? Please explain them separately. Answer: The methods for adjusting the quality of boiler feedwater include: 1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic. 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include saving chemicals, reducing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units used for condensate water treatment. 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizing agents; this regulation method is suitable for once-through boilers.
1. Fully volatile treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic ； 2. Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include reducing the amount of chemicals used, minimizing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units for condensate treatment ； 3. Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidants; this regulation approach is suitable for once-through boilers
1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method requires a relatively high amount of chemicals, and some of these chemicals are highly toxic. 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no or only a small amount of volatile alkalis added, along with oxidants; this helps to form a Fe2O3 protective film on the metal surface at a high potential, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include reducing chemical usage, minimizing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the coagulation water treatment desalination system. 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis and oxidizing agents; this regulation approach is suitable for once-through boilers.
Methods for regulating the quality of boiler feedwater include: 1. Total volatility treatment. It refers to the treatment of feedwater and boiler water using volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers); this method of adjustment is applicable to both once-through boilers and drum boilers. The cost of the agents used in this regulation method is relatively high, and some of these chemicals are highly toxic. 2. Neutral water treatment. It refers to keeping the boiler feedwater neutral, without adding or with only a small amount of volatile alkalis, and by adding oxidants to form a Fe2O3 protective film on the metal surface at a high potential, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include saving chemicals, reducing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units used for condensate water treatment. 3. Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizing agents; this regulation method is suitable for once-through boilers.
There are three types in total: 1. fully volatile treatment, 2. neutral treatment method, 3. combined treatment method.
What are the methods for adjusting the quality of boiler feedwater? Please explain them separately. Answer: The methods for adjusting the quality of boiler feedwater include: 1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic. 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include saving chemicals, reducing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units used for condensate water treatment. 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizing agents; this regulation method is suitable for once-through boilers.
What are the methods for adjusting the quality of boiler feedwater? Please explain them separately. Answer: The methods for adjusting the quality of boiler feedwater include: 1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic. 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include saving chemicals, reducing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units used for condensate water treatment. 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizing agents; this regulation method is suitable for once-through boilers.
1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic ； 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include reducing the amount of chemicals used, minimizing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units for condensate treatment ； 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizing agents; this regulation method is suitable for once-through boilers.
Methods for adjusting the quality of boiler feedwater include: 1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic. 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include saving chemicals, reducing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units used for condensate water treatment. 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizing agents; this regulation method is suitable for once-through boilers.
1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic ； 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include reducing the amount of chemicals used, minimizing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units for condensate treatment ； 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizing agents; this regulation method is suitable for once-through boilers.
1) Total volatility treatment. It refers to the situation where both feedwater and boiler water are treated with volatile bases (such as ammonia or neutralizing amines) as well as deoxidizers (hydrazine or other organic deoxidizers). This method of adjustment is applicable to both once-through boilers and drum boilers. This adjustment method involves relatively high costs for the chemicals used, and some of these chemical substances are highly toxic ； 2) Neutral water treatment. It refers to a treatment method in which the boiler feed water is kept neutral, with no volatile alkalis added or only a small amount added, and oxidizers are incorporated; this helps to form a Fe2O3 protective film with a high potential on the metal surface, thereby preventing corrosion and reducing the amount of metal oxides carried away. This control method is suitable for DC boilers operating at supercritical pressure, and drum boilers in air-cooled units also use this operation mode. Its advantages include reducing the amount of chemicals used, minimizing the amount of copper and iron oxides carried in the water, extending the boiler cleaning cycle, and prolonging the operational life of the desalination units for condensate treatment ； 3) Combined water treatment. It refers to the method of maintaining a certain level of alkalinity in the boiler feed water by adding volatile alkalis, as well as by adding oxidizers; this regulation approach is suitable for once-through boilers.