High-efficiency low-phosphorus corrosion and scale inhibiting dispersant and its preparation method

Abstract

The invention discloses a high-efficiency low-phosphorus corrosion and scale inhibiting dispersant and its preparation method. The high-efficiency low-phosphorus corrosion and scale inhibiting dispersant comprises: 2%-12% of sodium benzoate, 1%-5% of molybdate (or tungstate), 1%-2% of thiazole, 3%-6% of anhydrous zinc chloride, 8%-18% of polyphosphonocarboxylate, 5%-15% of acrylic acid-2-methyl-2-acrylamido propane sulfonic acid copolymer, 3%-6% of a stabilizer, 3%-6% of a tracer, and the balance deionized water. The dispersant of the invention can be widely applicable to water quality treatment of circulating water with a sum of hardness and alkalinity of less than 1100mg / L, a chloride ion concentration of less than 1000mg / L, pH of 6.8-9.5, and turbidity of less than 20NTYU. The dispersant provided in the invention has scale and corrosion inhibiting performances able to meet the requirements of industrial circulating water design specifications and a wide source water quality application range, and has the advantages of low phosphorus, environmental protection, strong chlorine resistance, applicability for auto-medicating control, as well as convenient use, etc.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a water treatment agent and a preparation method thereof, in particular to a high-efficiency low-phosphorus scale inhibitor dispersant for treating circulating cooling water and a preparation method thereof. Background technique [0002] The reuse rate of industrial water has reached 80%-90% in developed countries, and the concentration ratio of water has reached 6-8 times. However, the average water utilization rate in my country is less than 50%, and the concentration ratio of circulating cooling water is mostly at the level of 2-3 times. From the perspective of energy saving and water saving, it is undoubtedly a huge waste of resources. [0003] In order to save water resources, it is necessary to increase the reuse rate of water. In the process of water reuse, problems such as scaling, corrosion, bacteria and algae and slime reproduction will occur. A certain a...

AI Technical Summary

Problems solved by technology

Among them, organophosphate chemicals are most commonly used because of their high efficiency and dual functions of corrosion inhibition and scale inhibition. However, due to their high phosphorus content, a large amount of phosphate will flow into the environment when discharged, which will easily cause phosphorus-rich water systems to form "Red tide" makes the water lack of oxygen and affects the survival of aquatic organisms