Water treatment method for steam boiler

Abstract

The invention relates to the field of water treatment, and particularly discloses a steam boiler water treatment method, which comprises the following steps: (1), filtering raw water through a filtering piece to obtain filtered water; (2) adding a water treatment agent into the filtered water, and uniformly mixing the liquid to obtain treated water; (3) adding a pH regulator into the treated water, regulating the pH value of the treated water to be greater than or equal to 7, and removing oxygen to obtain water for the steam boiler, wherein the input amount of the water treatment agent is 1-2kg of the water treatment agent per ton of the filtered water. The water treatment agent comprises the following components in parts by mass: 10 parts of disodium ethylene diamine tetraacetate; 3.3 to 3.7 parts of triethanolamine; 5.5 to 5.9 parts of sodium tripolyphosphate; 2.1 to 2.6 parts of sodium citrate; and 1.3 to 1.8 parts of pentasodium diethylene triamine pentaacetate. The invention has the advantage of better delaying the generation of scale.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a water treatment method for a steam boiler. Background technique [0002] A boiler is a device that heats water to output high-temperature water or steam. In a steam boiler, since the water is in a heated state for a long time, if the water contains more metal ions, it is easy to form scale during the heating process. Once serious scaling occurs in the boiler Phenomenon, it will make the heat transfer performance worse, waste fuel, the temperature of the heated surface wall is too high, cause the metal material of the boiler to overheat, and cause the boiler to be damaged. Therefore, the steam boiler water must be treated before it can be used, otherwise it will bring serious harm to the boiler. . [0003] Boiler water treatment methods are mainly divided into physical water treatment methods, chemical water treatment methods, and physical and chemical water treatment methods. Ph...

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Problems solved by technology

[0002] A boiler is a device that heats water to output high-temperature water or steam. In a steam boiler, since the water is in a heated state for a long time, if the water contains more metal ions, it is easy to form scale during the heating process. Once serious scaling occurs in the boiler Phenomenon, it will make the heat transfer performance worse, waste fuel, the temperature of the heated surface wall is too high, cause the metal material of the boiler to overheat, and cause the boiler to be damaged. Therefore, the steam boiler water must be treated before it can be used, otherwise it will bring serious harm to the boiler.

[0003] Boiler water treatment methods are mainly divided into physical water treatment methods, chemical water treatment methods, and physical and chemical water treatment methods. Physical methods can only clean up scale in boilers, but cannot effectively treat water quality. Physical and chemical methods, such as water electricity Dialysis treatment has high equipment cost and large water loss, which does not meet the economic value and is rarely used. Therefore, the most commonly used method is chemical water treatment, that is, adding chemicals such as scale inhibitors to boiler water to reduce scale formation, but After the existing chemical drugs are put into use, they can only delay the formation of scale to a certain extent. After a period of time, scale will still be generated and need to be cleaned, and each scale cleaning takes a lot of time, whether it is physical cleaning or chemical cleaning. Both require a lot of manpower and material resources, and the scale inhibition effect of the existing chemical drugs is mediocre, resulting in a high cost of cleaning the scale. Therefore, there is still room for improvement

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