Composite low-phosphorus corrosion and scale inhibitor and application thereof

Abstract

The invention provides a composite low-phosphorus corrosion and scale inhibitor and application thereof. The composite low-phosphorus corrosion and scale inhibitor is prepared from a corrosion and scale inhibitor A and a corrosion and scale inhibitor B, wherein the corrosion and scale inhibitor A is prepared from 20-40 parts of polyepoxysuccinic acid (PESA), 20-40 parts of sodium gluconate and 20-60 parts of water; and the corrosion and scale inhibitor B is prepared from 10-25 parts of hydroxypropyl methacrylate (HPMA), 10-25 parts of acrylic acid / 2-acrylamido-2-methylacrylsulfonic acid copolymer (AA / AMPS), 5-10 parts of 2-phosphonobutyl-1,2,4-tricarboxylic acid (PBTCA), 10-25 parts of zinc salt, 1-2 parts of fluorescent tracer and 13-64 parts of water. The technical scheme is as follows: the corrosion and scale inhibitor A and the corrosion and scale inhibitor B in a weight ratio of 1:2 are compounded with water. The composite low-phosphorus corrosion and scale inhibitor has excellent corrosion and scale inhibition effects, and thus, the phosphorus content in the product is low, thereby reducing the phosphorus discharge and having favorable environmental protection performance.

Description

technical field [0001] The invention relates to a composite low phosphorus corrosion and scale inhibitor and its application. Background technique [0002] Phosphorus formulations have been applied for more than 30 years since the mid-1970s. Phosphorus-based water treatment agents still occupy an absolutely dominant position in water treatment because of their low price and good corrosion and scale inhibition properties. On the one hand, it has made a great positive contribution to solving the corrosion and scaling problems of industrial circulating water systems. It is conceivable that without the presence of polymeric phosphorus and organic phosphine, there will be no safe long-term operation of industrial circulating water systems and production equipment. Phosphorus systems Water treatment agents have brought huge wealth to society. On the other hand, because the phosphorus content in circulating water is generally 8-15mg / L, it brings a large amount of phosphorus-conta...

AI Technical Summary

Problems solved by technology

On the one hand, it has made a great positive contribution to solving the corrosion and scaling problems of industrial circulating water systems. It is conceivable that without the presence of polymeric phosphorus and organic phosphine, there will be no safe long-term operation of industrial circulating water systems and production equipment. Phosphorus systems Water treatment agents have brought huge wealth to society

On the other hand, because the phosphorus content in circulating water is generally 8-15mg / L, it brings a large amount of phosphorus-containing compounds to industrial wastewater, causing environmental pollution. Although phosphorus is non-toxic, as a nutrient source, it makes the water eutrophic It promotes the overgrowth of microorganisms, especially algae, causes lake water blooms, seawater red tides and other hazards, and destroys the ecological balance

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