Inhibiting fouling tendency in-high coal ash-containing water systems

Dispersions of coal ash in water can be inhibited or prevented from scaling and simultaneously be inhibited or prevented from fouling by introducing thereto an additive blend that includes an anionicwater-soluble polymer and a second polymer different from the anionic water-soluble polymer, where the second polymer is selected from the group consisting of copolymers and terpolymers having a plurality of hydrophobic groups. 水中煤灰的分散体可以通过向其中引入包括阴离子水溶性聚合物和不同于所述阴离子水溶性聚合物的第二聚合物的添加剂共混物来抑制或防止结垢并且同时抑制或防止积垢，其中所述第二聚合物选自由具有多个疏水性基团的共聚物和三元共聚物组成的组。