Boiler fouling causes and treatment
2023-08-22 13:10:53
The main reason for boiler fouling is that the water quality is too hard. A long time of use causes a large amount of ions such as calcium, sodium and magnesium to form and deposit on the metal surface of the boiler. The method of repelling must first be treated from the water, and then the furnace is washed. Specific work is best done by professionals.
Boiler fouling is mainly due to the impact of water quality. Tap water is hard water because hard water is water containing more soluble calcium and magnesium substances. After heating, these soluble calcium and magnesium substances are converted into insoluble substances. Precipitated impurities are mostly hard water. The more impurities, the greater the hardness of the water, the higher the hardness, the easier it is to form scale. Excess scale accumulation will affect thermal efficiency, increase heat loss, and increase energy consumption.
Prevention of boiler fouling
1. If it is a boiler for steam, after analyzing the water quality, it can be equipped with a large amount of fully automatic softening water equipment, such as the American Fleck, Atuzu are all good brands;
2, if it is to supply domestic hot water boiler, but also divided into two kinds, one is for the bath or hot water boiler, if this boiler is used directly for hot water, you can use electronic water treatment instrument, but not much effect The other is through the exchange of hot water heat exchanger, then the boiler's internal circulation can be a relatively small amount of automatic demineralized water equipment;
3, if it is a hot water boiler heating, you can use automatic demineralized water equipment, or electronic water treatment equipment (life is not very long, usually about two years) Second, in order to solve the scaling problem, you can add anti-fouling agent in the boiler water Can be bought on the market.
Boiler scale removal method The scale removal method is mainly to add chemicals to the scale, according to each ton of water plus sodium hydroxide and trisodium phosphate 2.5 kilograms each. Of course, according to the requirements of heat regulation and steam regulation, it is best to apply resin to demineralized water. The cost of scale energy consumption is much higher than the cost of demineralized water. After the boiler is used, a set of demineralized water is added, and now it is added to the scale.
1. Decomposed by heat, water containing temporary hardness enters the boiler. During the heating process, some calcium and magnesium salts are decomposed by heat, and they are converted from water-soluble substances to water-insoluble substances, and adhere to the metal surface of the boiler. Scale.
2. Some salts exceed their solubility. As the pot water continuously evaporates and concentrates, the dissolved salt content in the water increases continuously. When certain salts reach supersaturation, the salt precipitates on the evaporation surface and the solid phase is produced. Scale.
3. Solubility Decrease As the pot water temperature increases, the solubility of certain salts in pot water decreases, such as CaS04 and CaSi03 salts.
4. React to each other and react with other salts and bases in the pot with higher solubility of the original salts and generate water-insoluble compounds to produce scale.
5. Water slag conversion, when the pot is too much water, but also sticky, such as Mg (OH) 2 and Mg3 (P04) 2 and so on, if the sewage is not timely, it is easy to convert mud scale into scale.
6. Scale removal: 1. Manual descaling 2. Mechanical descaling 3. Chemical descaling
Boiler fouling is mainly due to the impact of water quality. Tap water is hard water because hard water is water containing more soluble calcium and magnesium substances. After heating, these soluble calcium and magnesium substances are converted into insoluble substances. Precipitated impurities are mostly hard water. The more impurities, the greater the hardness of the water, the higher the hardness, the easier it is to form scale. Excess scale accumulation will affect thermal efficiency, increase heat loss, and increase energy consumption.
Prevention of boiler fouling
1. If it is a boiler for steam, after analyzing the water quality, it can be equipped with a large amount of fully automatic softening water equipment, such as the American Fleck, Atuzu are all good brands;
2, if it is to supply domestic hot water boiler, but also divided into two kinds, one is for the bath or hot water boiler, if this boiler is used directly for hot water, you can use electronic water treatment instrument, but not much effect The other is through the exchange of hot water heat exchanger, then the boiler's internal circulation can be a relatively small amount of automatic demineralized water equipment;
3, if it is a hot water boiler heating, you can use automatic demineralized water equipment, or electronic water treatment equipment (life is not very long, usually about two years) Second, in order to solve the scaling problem, you can add anti-fouling agent in the boiler water Can be bought on the market.
Boiler scale removal method The scale removal method is mainly to add chemicals to the scale, according to each ton of water plus sodium hydroxide and trisodium phosphate 2.5 kilograms each. Of course, according to the requirements of heat regulation and steam regulation, it is best to apply resin to demineralized water. The cost of scale energy consumption is much higher than the cost of demineralized water. After the boiler is used, a set of demineralized water is added, and now it is added to the scale.
1. Decomposed by heat, water containing temporary hardness enters the boiler. During the heating process, some calcium and magnesium salts are decomposed by heat, and they are converted from water-soluble substances to water-insoluble substances, and adhere to the metal surface of the boiler. Scale.
2. Some salts exceed their solubility. As the pot water continuously evaporates and concentrates, the dissolved salt content in the water increases continuously. When certain salts reach supersaturation, the salt precipitates on the evaporation surface and the solid phase is produced. Scale.
3. Solubility Decrease As the pot water temperature increases, the solubility of certain salts in pot water decreases, such as CaS04 and CaSi03 salts.
4. React to each other and react with other salts and bases in the pot with higher solubility of the original salts and generate water-insoluble compounds to produce scale.
5. Water slag conversion, when the pot is too much water, but also sticky, such as Mg (OH) 2 and Mg3 (P04) 2 and so on, if the sewage is not timely, it is easy to convert mud scale into scale.
6. Scale removal: 1. Manual descaling 2. Mechanical descaling 3. Chemical descaling
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