Environment-friendly composite water treatment agent and application thereof

Abstract

The invention discloses an environment-friendly composite water treatment agent which is especially suitable for circulating cooling water of a central air conditioner. The water treatment agent comprises the following components by mass percent: 15-30% of polyepoxysuccinic acid, 10-20% of polyglutamic acid, 15-40% of sodium molybdate, 10-20% of sodium lauroyl sarcosinate, 10-25% of tetradecyl dimethyl benzyl ammonium chloride and the balance of water. When the dosage of the composite formula is 10mg / L, the scale inhibition rate reaches more than 90%, so that the corrosion rate of carbon steel is lower than 0.075mm / a, the corrosion rates of red copper and stainless steel are lower than 0.005mm / a, and the sterilizing rate reaches more than 85%.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a green and environment-friendly composite water treatment agent for central air-conditioning circulating cooling water treatment. Background technique [0002] The central air-conditioning cooling water system is an open loop system composed of cooling water pumps, pipelines, cooling towers, condensers of refrigerators, and sumps. The notable feature of this system is that the ratio of retained water (that is, system water capacity) to circulating water is very small. The make-up water of the cooling water system is basically tap water with high impurity content, so the concentration of the cooling water can reach 8 to 10 times in a short period of time. If proper treatment is not carried out, scaling, corrosion and biological slime will inevitably occur, leading to a series of problems such as pipeline blockage, corrosion leakage, greatly reduced heat transfer effici...

AI Technical Summary

Problems solved by technology

Commonly used water treatment agents for central air-conditioning cooling water mainly include polyphosphates, organic phosphines and inorganic salts. These scale and corrosion inhibitors are economical and efficient, but the biodegradability of polyphosphates and organic phosphines Poor, and the discharge of phosphorus-containing substances into the environment will cause eutrophication of the water body and seriously pollute the water environment. Inorganic salts such as sodium molybdate and sodium tungstate are expensive and used in large quantities

With the improvement of people's awareness of environmental protection, green and environmentally friendly water treatment agents such as polyaspartic acid and polyepoxysuccinic acid have been discovered. Such water treatment agents generally have the problem of good scale inhibition effect and poor corrosion inhibition effect.

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