What are the chemicals commonly used in boiler water treatment?

What are the chemicals commonly used in boiler water treatment?

1, sodium hydroxide

Caustic soda, also known as caustic soda, is a white solid. Its functions are:

(1) can effectively eliminate carbonate hardness and magnesium hardness in water;

(2) it can prevent some scaling substances from forming scale on the metal surface;

(3) Keep the boiler water alkaline to prevent boiler corrosion.

2. Sodium carbonate

Also called soda ash and soda. The main functions are:

(1) can effectively remove the calcium hardness in the influent;

(2) Sodium carbonate can be partially hydrolyzed into sodium hydroxide in the boiler, so it has the function of sodium hydroxide;

(3) that hardness of magnesium in wat can be eliminated;

(4) Keep the alkalinity of boiler water, so that calcium carbonate is called water slag, which is not easy to scale.

3. Trisodium phosphate

Also known as sodium phosphate. This function is:

(1) can precipitate calcium and magnesium salts in feed water;

(2) increasing the fluidity of water residue;

(3) it can make sulfate scale and carbonate scale loose and fall off;

(4) Prevent boiler metal corrosion.

4. Tannin extract

Also known as blood material, the main component is tannin (about 60%)

5. Sodium humate

The main functions are:

(1) softened water;

(2) increasing the fluidity of water residue;

(3) Corrosion inhibition;

(4) make the old scales fall off.

Humic acid is more effective in scale prevention, corrosion inhibition and steam quality improvement.

6. Water quality stabilizer

Organic water quality stabilizers used in boilers include: organic polyphosphate and organic polycarboxylate, both of which belong to high molecular polymers. Among them, organic phosphate is not easy to hydrolyze and has good stability. Organic polycarboxylates are partially ionized in water. These two chemicals have synergistic effect, and the combined use in cooling water has the best effect.