Low-phosphorous scale inhibition and dispersion agent for high-hardness and high-alkalinity circulation cooling water system

The invention discloses a low-phosphorous scale inhibition and dispersion agent for a high-hardness and high-alkalinity circulation cooling water system. The low-phosphorous scale inhibition and dispersion agent is prepared from, by weight, 10%-15% of phosphonate, 10%-15% of acrylic copolymer, 3%-5% of manganese salt, 2%-5% of copper corrosion inhibitor and 60%-75% of water.