Fouling is generally considered to be carried out in three steps. Including nucleation, grain growth, and crystal aggregation to form a precipitate. The following table lists the influencing factors and processes of calcium carbonate scale formation.
Table Environmental factors and effects affecting the formation of calcium carbonate
factor | effect |
pH value | When the high pH increases the absorption of CO 2, reducing the opening of soluble CaCO 3, a force balancing helps HCO 3 - generating CO 3 2 - |
temperature | The solubility of CaCO 3 is inversely proportional to the temperature, so it will cause precipitation and scale formation when the temperature is high. |
Turbulent flow | Nucleation occurs in high turbulence areas due to system pressure, resulting in crystal growth and scale formation |
pressure | A rapid drop in pressure will cause the solution to become unstable, causing nucleation and subsequent crystal growth and precipitation. |
Flow rate | When the flow rate is slow, it can affect the rate of fine nuclear growth or repeated dissolution, and the well increases the sedimentation rate. |
Inflatable | The solution system is inflated, increasing the likelihood of final fouling due to the increased CO 2 entering the solution and the subsequent formation of CO 3 2 - |
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