The classic product QD-671 is composed of a water-soluble polymer with good dispersion properties and other additives. The water-soluble polymer is copolymerized by four monomers. It contains 3 main functional groups: strong acid Group (sulfonic acid group), weak acid group (carboxylic acid group), non-ionic functional group, of which the weak acid group has the strongest attraction to the surface of suspended particles, can interfere with the normal growth of the crystal lattice, and has a good effect on the sediment Disperse adsorption. The strong acid group has only a weak adsorption force on the surface of the suspended particles, and the negative charge it carries has a repulsive force on the suspended particles with the same negative charge. This repulsive force prevents the suspended particles from condensing into large particles and depositing on the heat exchanger . The non-ionic functional group not only has a strong attraction to the surface of the suspended particles, but also has a repelling effect on the suspended particles to prevent their deposition. Therefore, the copolymer can disperse most of the deposits under any operating conditions, which can greatly alleviate the scaling phenomenon and keep the system safe and stable.