Boiler water treatment technology and application scope of dosing

First, the commonly used boiler water treatment technology is two kinds of boiler dosing and ion exchange method outside the boiler. The boiler dosing method is to add an appropriate amount of chemical anti-scaling agent to the boiler to cause chemical, physical or physical chemical action with the scale-causing substances such as calcium and magnesium ions in the pot water to form a precipitate of insoluble substances, forming a loose one. Scale is removed by boiler blowdown to prevent or reduce internal fouling.

Dehydration of feed water is one of the important measures to prevent corrosion of boiler metal and ensure safe operation of boiler thermal system. At present, the main deoxidation treatments are thermal deaeration, vacuum deoxidation, chemical deaeration and other newly developed deoxygenation methods. The most commonly used boiler water treatment technology is thermal deaeration.

2. Boiler water treatment characteristics in boiler water treatment technology Boiler water treatment is to reduce the scaled material in the boiler feed water into mud by inputting a certain amount of softener into the boiler, and then discharge the mud from the boiler through sewage discharge, thereby slowing down. Or to prevent scale build-up. This water treatment is mainly carried out inside the boiler, so it is called water treatment in the boiler. Boiler water treatment has the following characteristics:

1. Boiler water treatment does not require complicated equipment, so the investment is small, the cost is low, and the operation is convenient.

2. The boiler dosing treatment method is the most basic water treatment method, and it is the continuation and supplement of the chemical water treatment outside the boiler. After the water treatment outside the pot, there may be residual hardness. In order to prevent boiler scaling and corrosion, a certain amount of water treatment agent is added.

3. Boiler water treatment can not completely prevent the scale from forming in the boiler, especially the generated scale. It is easy to produce secondary scale when the sewage is not timely.

4. The boiler dosing treatment method has no pollution to the environment. It does not treat water, such as ion exchange, how much impurities are removed from natural water, how much impurities are discharged after regeneration, and a large amount of remaining regenerant and regenerated products are also discharged. The boiler dosing treatment method is to change the main impurities in the water into insoluble mud, which will not cause pollution to nature.

5. The formula used in the boiler dosing method should be matched with the water quality of the feed water. When the water hardness is too high, a large amount of water slag will be formed to accelerate the scaling of the heat transfer surface. Therefore, it is generally not suitable for high hardness water quality.

Third, the scope of application of boiler dosing

According to the characteristics of boiler water treatment, boiler treatment water treatment can be used as long as the following conditions are met:

1. The boiler has no water wall tube;

2. It can ensure the reliable removal of the slag formed in the boiler during operation;

3. The dirt formed by dosing does not affect the safe operation of the boiler;

4. The use unit does not require high steam quality.