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This post was last edited by Yi Xiaoxin on 2016-5-25 at 15:44. My question is: After adding a graywater scale-inhibiting dispersant to a new water-coal slurry graywater system, is it good or bad if calcium ions and hardness conductivity increase significantly? I used to think that after adding such a dispersant, values like calcium ion levels and hardness should remain at a relatively low level, around 1100, indicating that the system is in good condition. However, there is another opinion suggesting that after adding the agent, ions such as calcium and magnesium dissolve in the graywater in an ionic form due to the action of the agent, so they do not form scale or precipitates; as a result, the values may rise from 1100 to 1500–1600 and remain at that level, allowing them to be detected by chemical analysis methods. Therefore, an increase in calcium ion hardness is a normal phenomenon resulting from the effect of the agent. Could any experts please provide an answer? I’m not sure if I’ll get a response here; thank you all. The above description is a bit complicated, so I’ll simplify my question: In Texaco’s coal water slurry ash water system, after adding a new ash water dispersion and scale inhibition agent (with no changes in the amount of ash water discharged or reused, nor in any of the process parameters), parameters indicating the tendency for scaling such as calcium ion hardness and conductivity increased significantly compared to before (hardness and calcium ions rose from 1100 to 1450, while conductivity increased from 3800 to 5000). Does this indicate that the new agent has a better effect in terms of dispersion and scale inhibition? Worse still?
One prerequisite is that it is assumed that the water supply and drainage in the graywater system are inconvenient, and there are no changes in the process; the only change is the addition of a graywater dispersant
It can disperse insoluble inorganic salts in water, prevent or inhibit the precipitation and scaling of such salts on metal surfaces, and maintain good heat transfer performance in metal equipment
I’ll try to push through on my own; I hope someone experienced can help!