How does scale form in a biomass boiler?

1. Decomposition by heat

After the water with temporary hardness enters the boiler, during the heating process, some calcium and magnesium salts are heated and decomposed, and they change from water-soluble substances to hardly water-soluble substances, which adhere to the boiler metal surface and form scale, calcium and magnesium. The salt is broken down as follows:
           ca(HC03)2 →CaC03 ↓ +H2O+C02↑Mg(HCO)2→MgC03+H2O+C02↑MgC03+H2O → Mg(OH)2↓+c02↑
2. The solubility of some salts is greater than its solubility. Due to the continuous evaporation and concentration of the pot water, the content of dissolved salts in the water continues to increase. When some salts reach supersaturation, the salts will precipitate a solid phase on the evaporation surface and form Scale.
3. Decrease in solubility
As the temperature of the pot water increases, the solubility of certain salts in the pot water decreases, such as CaS04 and CaSi03.
4. Mutual reaction
After the salt with high original solubility in the feed water reacts with other salts and alkalis in the pot water, compounds that are hardly soluble in water are formed, thereby forming scale. Some salts and bases react with each other as follows:
           Ca(HC03)2+2NaOH=CaC03 ↓ +N4C03+H20CaCl2+Na2C03=CaC03↓+2NaCl5. Slag conversion:
When there is too much water slag in the pot, and it is sticky, such as Mg (OH)2 and Mg3(P04)2, etc., if the sewage is not discharged in time, it is easy to convert from sludge to scale.
Above we have analyzed the hazards and causes of scale in biomass boilers. How can we remove these scales? In fact, we only need to use related boiler descaling agents to treat scale.