Scale inhibitor and preparation method thereof

Abstract

The invention relates to a scale inhibitor and a preparation method thereof, belonging to the technical field of chemical product; the weight percentages of ingredients thereof are: 2-4% of phosphonocarboxylic acid, 15-25% of low temperature acrylic copolymer, 14-20% of medium and high temperature polymaleic acid dispersant, 15-20% of cherry bay acyl creatine, 1-2% of metal inhibitor BTA, 10-20% of anionic polyacrylamide flocculating agent and the excess of deionized water. The scale inhibitor can all be used in medium, low and high temperature circulating water system, scale is not formed at the medium, low and high temperature parts and relatively good inhibition effect can be achieved when turbidity is relatively high. The scale inhibitor is prepared by the following steps: (1) adding low temperature acrylic copolymer dispersant, phosphonocarboxylic acid, medium and high temperature polymaleic acid dispersant and part of deionized water into a same reaction kettle and stirring the mixture for 10-20min; (2) adding cherry bay acyl creatine, metal inhibitor BTA and anionic polyacrylamide sequentially into the reaction kettle and stirring the mixture for 8-12 min, then adding the rest deionized water into the reaction kettle and stirring for 8-12min to obtain the finished product; the preparation method of the invention is simple and easy to be carried out.

Description

technical field [0001] The invention relates to a scale and corrosion inhibitor, which is used for scale and corrosion inhibition of circulating cooling water, and belongs to the technical field of chemical products. Background technique [0002] The circulating cooling water system requires the use of scale and corrosion inhibitors to prevent scaling and delay corrosion. The existing scale and corrosion inhibitors, the main components: hydroxyethylidene diphosphonic acid and hydrolyzed polymaleic acid products, have the following two major problems: [0003] (1) When circulating water containing scale and corrosion inhibitors circulates heat in equipment at low temperatures, white loose scales are likely to form. For example, a circulating cooling water system containing an air separation tower device is prone to form low temperature Scale body, the temperature here is about 10 ℃, it is easy to block the nozzle. [0004] (2) When the turbidity of circulating water is high...

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Problems solved by technology

[0003] (1) Circulating water containing scale and corrosion inhibitors is easy to form white loose scale when the equipment is circulating and exchanging heat at low temperature. For example, the circulating cooling water system containing the air separation tower device is easy to form low temperature Scale body, the temperature here is about 10°C, it is easy to block the nozzle