Phosphorus-free composite scale and corrosion inhibitor, applications thereof, and processing method for circulating water

Abstract

The invention discloses a phosphorus-free composite scale and corrosion inhibitor, applications thereof, and a processing method for circulating water. The phosphorus-free composite scale and corrosion inhibitor comprises a scale inhibitor, dispersants, inorganic-salt-type phosphorus-free corrosion inhibitors and manganese salts. The scale inhibitor is polyaspartic acid and / or polyepoxysuccinic acid. The weight ratio of the scale inhibitor, the dispersants, the inorganic-salt-type phosphorus-free corrosion inhibitors and the manganese salts is 1:0.2-10:0.5-15:0.025-1, wherein the weight of the manganese salts is in terms of manganese ions. The phosphorus-free composite scale and corrosion inhibitor has good synergistic effects with non-oxidation-type bactericides, especially isothiazolinone, and can raise the bactericidal effects of the non-oxidation-type bactericides obviously, the bactericidal speed is rapid and the drug effect time is long. The phosphorus-free composite scale and corrosion inhibitor is environmentally friendly, has phosphorus-free and nitrogen-free characteristics, meets green environmental protection requirements, and reduces environmental burden. The phosphorus-free composite scale and corrosion inhibitor has a wide water quality adaptation range, and is easy to be popularized and applied.

Description

technical field [0001] The invention relates to a phosphorus-free composite scale and corrosion inhibitor and its application and a treatment method for circulating water, in particular, to a phosphorus-free composite scale and corrosion inhibitor and its application in circulating water treatment and the use of the non-phosphorus A circulating water treatment method for a phosphorus composite scale and corrosion inhibitor. Background technique [0002] Water is the basic condition for human survival, but water resources in the world 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 poorer. With the rapid development of industry, the ecological balance of water has been seriously damaged. In order to solve the water resource crisis and adapt to sustainable development, it is necessary to save water reasonably. The amount of cooling water in industrial water accounts for 60-80% by weight...

AI Technical Summary

Problems solved by technology

[0005] In the treatment process of circulating water, it is necessary to add a bactericide while adding a scale and corrosion inhibitor to inhibit the growth of microorganisms in the circulating water, but when using the above-mentioned scale and corrosion inhibitors containing zinc salts, the scale and corrosion There is no significant synergistic effect, especially when using isothiazolinone as a fungicide, the fungicide takes effect slowly and has a short duration of action

Images