Sulfur Daily Question 2019.1.18
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What effects do dissolved substances in water have on boilers? Answer: Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+), magnesium ions (Mg2+), bicarbonate ions (HCO3—), carbonate ions (CO32—), ferrous ions (Fe2+), ferric ions (Fe3+), chloride ions (Cl—), sulfate ions (SO42—), silicic acid (H4SiO4), and so on. ①Calcium and magnesium ions are the main cations in natural water, present in almost all natural waters. The concentration of these ions in water is commonly referred to as \"hardness\". Since water hardness is the main factor causing scaling in boilers, the primary task in boiler water treatment is to remove hardness in order to prevent scaling. For different boilers, an appropriate treatment method should be selected based on the boiler’s requirements regarding the hardness of the feed water. ②Bicarbonate and carbonate are both major components of alkalinity in water. Since alkaline substances can cause calcium and magnesium ions in the boiler water to form sludge, which can then be removed through blowdown, thereby serving a certain antiscalant function, low-pressure boilers require a certain level of alkalinity in their water. However, if the alkalinity in the boiler water is too high, it will not only severely affect the quality of the steam, but it can also cause alkaline corrosion in boilers operating under high pressure. ③Iron compounds are common minerals, so iron is also a common impurity in natural water. Fe3+ is a strong depolarizer that accelerates the electrochemical corrosion of boilers. At the same time, when the iron content in the boiler water is high, iron oxide scale is likely to form on the heating surfaces subjected to high heat loads, thereby affecting the boiler’s heat transfer. ④A small amount of chlorides poses no harm to boilers, but since Cl— is an activating ion that can, under certain conditions, destroy the protective layer on the metal surface and accelerate corrosion, the chloride content in boiler water should not be too high. ⑤The content of silicic acid in water is usually expressed as SiO2, which is why it is also known as soluble silica. Generally, the silicon content in groundwater is higher than that in surface water. The solubility of silicides decreases as temperature rises, and on high-temperature heating surfaces, silicate scale with a very low thermal conductivity and extreme hardness tends to form. For medium and high-pressure boilers, if the silicon content in the boiler water is too high, silicates can be carried in the steam, leading to the formation of deposits that are very difficult to remove in thermal systems such as superheaters and turbine blades, thereby affecting the proper operation of these thermal equipment.
Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+), magnesium ions (Mg2+), bicarbonate ions (HCO3—), carbonate ions (CO32—), ferrous ions (Fe2+), ferric ions (Fe3+), chloride ions (Cl—), sulfate ions (SO42—), silicic acid (H4SiO4), and so on. ①Calcium and magnesium ions are the main cations in natural water, present in almost all natural waters. The concentration of these ions in water is commonly referred to as \"hardness\". Since water hardness is the main factor causing scaling in boilers, the primary task in boiler water treatment is to remove hardness in order to prevent scaling. For different boilers, an appropriate treatment method should be selected based on the boiler’s requirements regarding the hardness of the feed water. ②Bicarbonate and carbonate are both major components of alkalinity in water. Since alkaline substances can cause calcium and magnesium ions in the boiler water to form sludge, which can then be removed through blowdown, thereby serving a certain antiscalant function, low-pressure boilers require a certain level of alkalinity in their water. However, if the alkalinity in the boiler water is too high, it will not only severely affect the quality of the steam, but it can also cause alkaline corrosion in boilers operating under high pressure. ③Iron compounds are common minerals, so iron is also a common impurity in natural water. Fe3+ is a strong depolarizer that accelerates the electrochemical corrosion of boilers. At the same time, when the iron content in the boiler water is high, iron oxide scale is likely to form on the heating surfaces subjected to high heat loads, thereby affecting the boiler’s heat transfer. ④A small amount of chlorides poses no harm to boilers, but since Cl— is an activating ion that can, under certain conditions, destroy the protective layer on the metal surface and accelerate corrosion, the chloride content in boiler water should not be too high. ⑤The content of silicic acid in water is usually expressed as SiO2, which is why it is also known as soluble silica. Generally, the silicon content in groundwater is higher than that in surface water. The solubility of silicides decreases as temperature rises, and on high-temperature heating surfaces, silicate scale with a very low thermal conductivity and extreme hardness tends to form. For medium and high-pressure boilers, if the silicon content in the boiler water is too high, silicates can be carried in the steam, leading to the formation of deposits that are very difficult to remove in thermal systems such as superheaters and turbine blades, thereby affecting the proper operation of these thermal equipment.
Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+) and magnesium ions (Mg2+).
Answer: Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+) and magnesium ions (Mg2+.
Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+), magnesium ions (Mg2+), bicarbonate ions (HCO3—), carbonate ions (CO32—), ferrous ions (Fe2+), ferric ions (Fe3+), chloride ions (Cl—), sulfate ions (SO42—), silicic acid (H4SiO4), and so on. ①Calcium and magnesium ions are the main cations in natural water, present in almost all natural waters. The concentration of these ions in water is commonly referred to as \"hardness\". Since water hardness is the main factor causing scaling in boilers, the primary task in boiler water treatment is to remove hardness in order to prevent scaling. For different boilers, an appropriate treatment method should be selected based on the boiler’s requirements regarding the hardness of the feed water. ②Bicarbonate and carbonate are both major components of alkalinity in water. Since alkaline substances can cause calcium and magnesium ions in the boiler water to form sludge, which can then be removed through blowdown, thereby serving a certain antiscalant function, low-pressure boilers require a certain level of alkalinity in their water. However, if the alkalinity in the boiler water is too high, it will not only severely affect the quality of the steam, but it can also cause alkaline corrosion in boilers operating under high pressure. ③Iron compounds are common minerals, so iron is also a common impurity in natural water. Fe3+ is a strong depolarizer that accelerates the electrochemical corrosion of boilers. At the same time, when the iron content in the boiler water is high, iron oxide scale is likely to form on the heating surfaces subjected to high heat loads, thereby affecting the boiler’s heat transfer. ④A small amount of chlorides poses no harm to boilers, but since Cl— is an activating ion that can, under certain conditions, destroy the protective layer on the metal surface and accelerate corrosion, the chloride content in boiler water should not be too high. ⑤The content of silicic acid in water is usually expressed as SiO2, which is why it is also known as soluble silica. Generally, the silicon content in groundwater is higher than that in surface water. The solubility of silicides decreases as temperature rises, and on high-temperature heating surfaces, silicate scale with a very low thermal conductivity and extreme hardness tends to form. For medium and high-pressure boilers, if the silicon content in the boiler water is too high, silicates can be carried in the steam, leading to the formation of deposits that are very difficult to remove in thermal systems such as superheaters and turbine blades, thereby affecting the proper operation of these thermal equipment.
Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+), magnesium ions (Mg2+), bicarbonate ions (HCO3—), carbonate ions (CO32—), ferrous ions (Fe2+), ferric ions (Fe3+), chloride ions (Cl—), sulfate ions (SO42—), silicic acid (H4SiO4), and so on. ①Calcium and magnesium ions are the main cations in natural water, present in almost all natural waters. The concentration of these ions in water is commonly referred to as \"hardness\". Since water hardness is the main factor causing scaling in boilers, the primary task in boiler water treatment is to remove hardness in order to prevent scaling. For different boilers, an appropriate treatment method should be selected based on the boiler’s requirements regarding the hardness of the feed water. ②Bicarbonate and carbonate are both major components of alkalinity in water. Since alkaline substances can cause calcium and magnesium ions in the boiler water to form sludge, which can then be removed through blowdown, thereby serving a certain antiscalant function, low-pressure boilers require a certain level of alkalinity in their water. However, if the alkalinity in the boiler water is too high, it will not only severely affect the quality of the steam, but it can also cause alkaline corrosion in boilers operating under high pressure. ③Iron compounds are common minerals, so iron is also a common impurity in natural water. Fe3+ is a strong depolarizer that accelerates the electrochemical corrosion of boilers. At the same time, when the iron content in the boiler water is high, iron oxide scale is likely to form on the heating surfaces subjected to high heat loads, thereby affecting the boiler’s heat transfer. ④A small amount of chlorides poses no harm to boilers, but since Cl— is an activating ion that can, under certain conditions, destroy the protective layer on the metal surface and accelerate corrosion, the chloride content in boiler water should not be too high. ⑤The content of silicic acid in water is usually expressed as SiO2, which is why it is also known as soluble silica. Generally, the silicon content in groundwater is higher than that in surface water. The solubility of silicides decreases as temperature rises, and on high-temperature heating surfaces, silicate scale with a very low thermal conductivity and extreme hardness tends to form. For medium and high-pressure boilers, if the silicon content in the boiler water is too high, silicates can be carried in the steam, leading to the formation of deposits that are very difficult to remove in thermal systems such as superheaters and turbine blades, thereby affecting the proper operation of these thermal equipment.
It can cause scaling and corrosion in the boiler, as well as contamination of the steam quality; it may lead to overheating and deformation of the boiler’s metal components, corrosion-induced perforations, a reduced service life of the boiler, fuel waste, and lower thermal efficiency. It can also cause foaming in the steam, resulting in serious issues such as pipe blockages and pipe ruptures, thereby disrupting the safe and efficient operation of the boiler.
Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+), magnesium ions (Mg2+), bicarbonate ions (HCO3—), carbonate ions (CO32—), ferrous ions (Fe2+), ferric ions (Fe3+), chloride ions (Cl—), sulfate ions (SO42—), silicic acid (H4SiO4), and so on. ①Calcium and magnesium ions are the main cations in natural water, present in almost all natural waters. The concentration of these ions in water is commonly referred to as \"hardness\". Since water hardness is the main factor causing scaling in boilers, the primary task in boiler water treatment is to remove hardness in order to prevent scaling. For different boilers, an appropriate treatment method should be selected based on the boiler’s requirements regarding the hardness of the feed water. ②Bicarbonate and carbonate are both major components of alkalinity in water. Since alkaline substances can cause calcium and magnesium ions in the boiler water to form sludge, which can then be removed through blowdown, thereby serving a certain antiscalant function, low-pressure boilers require a certain level of alkalinity in their water. However, if the alkalinity in the boiler water is too high, it will not only severely affect the quality of the steam, but it can also cause alkaline corrosion in boilers operating under high pressure. ③Iron compounds are common minerals, so iron is also a common impurity in natural water. Fe3+ is a strong depolarizer that accelerates the electrochemical corrosion of boilers. At the same time, when the iron content in the boiler water is high, iron oxide scale is likely to form on the heating surfaces subjected to high heat loads, thereby affecting the boiler’s heat transfer. ④A small amount of chlorides poses no harm to boilers, but since Cl— is an activating ion that can, under certain conditions, destroy the protective layer on the metal surface and accelerate corrosion, the chloride content in boiler water should not be too high. ⑤The content of silicic acid in water is usually expressed as SiO2, which is why it is also known as soluble silica. Generally, the silicon content in groundwater is higher than that in surface water. The solubility of silicides decreases as temperature rises, and on high-temperature heating surfaces, silicate scale with a very low thermal conductivity and extreme hardness tends to form. For medium and high-pressure boilers, if the silicon content in the boiler water is too high, silicates can be carried in the steam, leading to the formation of deposits that are very difficult to remove in thermal systems such as superheaters and turbine blades, thereby affecting the proper operation of these thermal equipment.
Dissolved substances refer to particles with a diameter of less than 10-6 mm; due to their extreme small size, they cannot be seen with the human eye. Water generally contains calcium ions (Ca2+), magnesium ions (Mg2+), bicarbonate ions (HCO3—), carbonate ions (CO32—), ferrous ions (Fe2+), ferric ions (Fe3+), chloride ions (Cl—), sulfate ions (SO42—), silicic acid (H4SiO4), and so on. ①Calcium and magnesium ions are the main cations in natural water, present in almost all natural waters. The concentration of these ions in water is commonly referred to as \"hardness\". Since water hardness is the main factor causing scaling in boilers, the primary task in boiler water treatment is to remove hardness in order to prevent scaling. For different boilers, an appropriate treatment method should be selected based on the boiler’s requirements regarding the hardness of the feed water. ②Bicarbonate and carbonate are both major components of alkalinity in water. Since alkaline substances can cause calcium and magnesium ions in the boiler water to form sludge, which can then be removed through blowdown, thereby serving a certain antiscalant function, low-pressure boilers require a certain level of alkalinity in their water. However, if the alkalinity in the boiler water is too high, it will not only severely affect the quality of the steam, but it can also cause alkaline corrosion in boilers operating under high pressure. ③Iron compounds are common minerals, so iron is also a common impurity in natural water. Fe3+ is a strong depolarizer that accelerates the electrochemical corrosion of boilers. At the same time, when the iron content in the boiler water is high, iron oxide scale is likely to form on the heating surfaces subjected to high heat loads, thereby affecting the boiler’s heat transfer. ④A small amount of chlorides poses no harm to boilers, but since Cl— is an activating ion that can, under certain conditions, destroy the protective layer on the metal surface and accelerate corrosion, the chloride content in boiler water should not be too high. ⑤The content of silicic acid in water is usually expressed as SiO2, which is why it is also known as soluble silica. Generally, the silicon content in groundwater is higher than that in surface water. The solubility of silicides decreases as temperature rises, and on high-temperature heating surfaces, silicate scale with a very low thermal conductivity and extreme hardness tends to form. For medium and high-pressure boilers, if the silicon content in the boiler water is too high, silicates can be carried in the steam, leading to the formation of deposits that are very difficult to remove in thermal systems such as superheaters and turbine blades, thereby affecting the proper operation of these thermal equipment.