Compound corrosion and scale inhibitor

Abstract

The invention provides a compound corrosion and scale inhibitor. The compound corrosion and scale inhibitor is a liquid preparation which is prepared by mixing a first liquid preparation with a second liquid preparation according to the ratio of 1:1; a compound preparation prepared from organic phosphonic acid, polycarboxylic acid, a dispersing agent and water is adopted as the first liquid preparation; a compound preparation prepared from solid agentia and water according to the weight ratio of 1:1 is adopted as the second liquid preparation, wherein a compound preparation which has the scale inhibition effect and is prepared from polymers, an alkaline agent, azoles and zinc salt is adopted as the solid agentia. The compound corrosion and scale inhibitor can achieve the effects of corrosion inhibition, scale inhibition and sterilization and algae removal which meet the national requirements, can be applied to a circulating cooling water system with the high concentration multiple, is convenient to put, does not need to be prefilmed, can be used at normal temperature and is good in using effect.

Description

technical field [0001] The invention relates to a water treatment agent for circulating water, in particular to a composite corrosion and scale inhibitor for treating circulating water with high concentration multiples, and is used for the treatment of circulating water with high concentration multiples (K>8). Background technique [0002] The recycling of industrial cooling water not only greatly saves production water consumption, reduces water pollution, but also greatly reduces the operating costs of enterprises. However, cooling water is easy to breed bacteria, fungi, algae, protozoa and other microorganisms during the circulation process. The mineral content in the water will also continue to increase and concentrate, eventually causing scaling and corrosion of production equipment and pipelines. The existence of dirt will not only affect the heat transfer efficiency, but also cause corrosion under scale. Therefore, cooling water must be dosed with chemical agents w...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the water treatment chemicals used at home and abroad are organic phosphine series chemicals, and the concentration ratio of this series of chemicals is generally below 5, resulting in a large waste of water resources

The corrosion inhibition effect of existing solid scale inhibitors on carbon steel generally cannot meet the national standard of carbon steel corrosion rate of 0.1-0.2mm / year, and in order to increase the corrosion inhibition effect of solid agents, the system is often required to be pre-coated and the temperature reaches 40 ~ 60 ℃, and the amount of cooling water is often large, it is difficult to pre-film in advance, and it is difficult to ensure that the pre-film effect meets the technical requirements

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