Non-phosphorus corrosion and scale inhibitor

Abstract

The invention discloses a non-phosphorus corrosion and scale inhibitor. The non-phosphorus corrosion and scale inhibitor is prepared from the following components in percentage by weight: 8 to 12 percent of hydrolytic polymaleic anhydride, 10 to 15 percent of polyepoxysuccinic acid, 15 to 20 percent of acrylic acid-2-acrylamido-2-methylpropanesulfonic acid multipolymer, 10 to 15 percent of carboxylic acid-sulfonic acid-acrylate terpolymer, 8 to 12 percent of acrylic acid-hydroxypropyl acrylate copolymer, 4 to 8 percent of zinc sulphate heptahydrate and the balance of deionized water. The invention further discloses a preparation method of the corrosion and scale inhibitor. The preparation method comprises the following steps: weighing the components according to the formula; adding the components into a stirrer in sequence; stirring at normal temperature and under normal pressure to obtain the corrosion and scale inhibitor. The corrosion and scale inhibitor disclosed by the invention has the advantages of freeness from phosphorus, adoption of safe and environment-friendly components, simple production process, high scale-inhibiting efficiency, high corrosion-inhibiting performance, prevention of eutrophication of a water body caused by discharge of phosphorus, and very high compatibility; the adhesion of microorganisms to equipment can be reduced effectively, and the corrosionand and scale inhibiting performance can be enhanced greatly.

Description

technical field [0001] The invention relates to the technical field of industrial circulating cooling water treatment, in particular to a phosphorus-free corrosion and scale inhibitor. Background technique [0002] Water is the basic condition for human survival, but the world's water resources are limited. my country's per capita water volume is only a quarter of the world's per capita water volume, and water resources are even more scarce. With the rapid development of industry, the ecological balance of water has been seriously damaged. In order to solve the water crisis and adapt to sustainable development, it is necessary to save water reasonably. The cooling water consumption in industrial water accounts for 60-80% of the total water consumption. Therefore, the main goal of saving industrial water is to recycle the cooling water, improve the reuse rate as much as possible, and reduce sewage. However, during the use of cooling water, with the continuous circulation a...

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Problems solved by technology

[0003] At present, the corrosion and scale inhibitors used in industrial circulating water are still based on phosphorus-containing formulas, but the use of phosphorus-containing compounds leads to eutrophication of water quality, which promotes the excessive reproduction of microorganisms, especially algae, and the rate of organic matter production far exceeds the rate of consumption. , the accumulation of organic matter in the water body will destroy the ecological balance of the water body

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