Composite scale and corrosion inhibitor

Abstract

The invention is a compound high-efficiency scale and corrosion inhibitor, which is compounded by a group of organic and inorganic corrosion and scale inhibitors, scale and dispersants, and auxiliary agents. It has strong coordination and good compatibility with fungicides. , Easy to use and operate, and excellent comprehensive performance. Under the conditions of high concentration multiple and high pH value, it has a strong inhibitory effect on the corrosion of carbon steel, stainless steel, copper and other materials and the deposition of inorganic scales such as calcium carbonate and calcium phosphate.

Description

1. Technical field [0001] The invention relates to a scale and corrosion inhibitor for circulating cooling water, in particular to a scale and corrosion inhibitor for a circulating cooling water system with high concentration ratio, high hardness and high pH value. 2. Background technology [0002] Water is the blood of industry. In industrial water, cooling water accounts for about 80%, of which 50% is circulating cooling water. The recycling of cooling water achieves the purpose of saving water, but it also brings problems such as scaling and corrosion of heat exchange equipment. The national standard GB50050-95 "Code for Design of Industrial Circulating Cooling Water Treatment" has strict requirements on the quality of circulating cooling water: carbon steel corrosion rate < 0.125mm / a, stainless steel, copper, brass corrosion rate < 0.005mm / a, dirt thermal resistance The value should be <1.72×10 -4 ~3.44×10 -4 m 2 ·K / W, the concentration ratio of the circula...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many types of scale and corrosion inhibitors used in industrial circulating cooling water systems, but the use of a single scale and corrosion inhibitor has problems such as low concentration ratio and pH value below 8.5.

Existing composite scale and corrosion inhibitors cannot operate better at a concentration factor higher than 4 times, resulting in a large amount of sewage in the circulating cooling water system, and a large amount of chemical agent consumption and supplementary water