Special corrosion and scale inhibitor for high concentration index recycling water and preparation method of special corrosion and scale inhibitor

Abstract

The invention discloses a special corrosion and scale inhibitor for high concentration index recycling water and a preparation method of the special corrosion and scale inhibitor. The special corrosion and scale inhibitor is prepared from the following raw materials in percentage by weight: 15-25% of acrylic acid-acrylic ester-phosphonic acid-sulfonate quadripolymer, 20-25% of carboxylic acid-sulfoacid-acrylic ester terpolymer, 15-20% of 2-hydroxyphosphonoacetic acid, 10-20% of phosphino-carboxylic acid, 2-3% of zinc sulfate heptahydrate and the balance of deionized water. The corrosion and scale inhibitor has the excellent effects of scale inhibition, corrosion inhibition, prefilming and bacteria and algae growth inhibition, a recycling cooling water system can operate under the situationthat the concentration rate of the recycling water is 10-40 by adjusting the dosage when the inhibitor is applied to the recycling cooling water system, the water saving effect is much more higher than that of existing drugs on the market, the corrosion and scale inhibitor realizes the effect of zero drainage of the recycling water, can be widely applied to all recycling water for coking, rubber,chloro-alkali and fertilizer, and has a good effect on equipment such as carbon steel, stainless steel and copper; the corrosion and scale inhibitor has considerable economic benefits and social benefits and high popularization value.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a special corrosion and scale inhibitor for circulating water with high concentration ratio and a preparation method thereof. Background technique [0002] At present, most of the circulating water treatment agents use some foreign technologies. The market is mainly based on phosphorus, which has anti-scaling effect, but is severely corroded. Although chromium is good, it is banned due to serious environmental pollution, and the amount of molybdenum is large. And the cost is high, the all-organic system is expensive, and the tungsten and silicon systems cannot achieve the desired effect. The above-mentioned agents are difficult to achieve water-saving effect, and can only be operated when the concentration ratio of circulating water is less than 5, which seriously wastes water resources. [0003] In the prior art, the zero-discharge technology of the evaporation method i...

AI Technical Summary

Problems solved by technology

Disadvantages of this method: 1. Expensive treatment costs; 2. Huge investment in equipment; 3. Frequent cleaning of the evaporator is required

[0004] Electrodialysis zero-emission technology uses electrodes to precipitate calcium salts on the plate. The disadvantages of this method are: 1. Frequent treatment of residues is required; 2. Failure to precipitate chloride ions will cause serious equipment corrosion; 3. Limited processing capacity; 4. Only suitable for small water treatment systems

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