Industrial circulating water synergist

Abstract

The invention relates to an industrial circulating water synergist and belongs to the technical field of fine chemical engineering. The industrial circulating water synergist comprises components in percentage by weight as follows: 5%-7% of fatty alcohol-polyoxyethylene ether, 9.5%-11% of acrylic acid, 18%-20% of polyepoxysuccinic acid, 21%-25% of HEDP, 5%-6.5% of ethylene diamine tetraacetic acid, 2%-3% of dodecyl dimethyl benzyl ammonium bromide and the balance of water. After addition of circulating water, the industrial circulating water synergist forms a supermolecular film superior to a nanofilm on the metal surface under supramolecular recognition and selective assembly functions, so that corrosion inhibition and scale inhibition effects are close to 100%; furthermore, on-line cleaning of a pre-film, corrosion prevention, scale inhibition, sterilization and algae killing can be realized, pollution discharge is not needed after on-line cleaning of the pre-film, and operation is performed directly; flow velocity and heat exchange capability of the circulating water can be increased, the heat exchange efficiency of the circulating water is improved, and sewage and wastewater emission is reduced.

Description

technical field [0001] The invention relates to an industrial circulating water synergist, which belongs to the technical field of fine chemicals. Background technique [0002] During the operation of the industrial circulating cooling water system, the main problems are: (1) scale: due to the continuous evaporation of the circulating water during the cooling process, the salt concentration in the water increases continuously, exceeding the solubility of some salts and depositing. The common ones are calcium carbonate, calcium phosphate, magnesium silicate and other scales. The texture of scale is relatively dense, which greatly reduces the heat transfer efficiency. A scale thickness of 0.6 mm reduces the heat transfer coefficient by 20%. (2) Dirt: Dirt is mainly composed of organic matter in water, microbial colonies and secretions, sediment, dust, etc. The texture of the dirt is soft, which not only reduces the heat transfer efficiency but also causes corrosion under the ...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the industrial circulating cooling water system, the main problems are: (1) Scale: due to the continuous evaporation of the circulating water during the cooling process, the salt concentration in the water continues to increase, exceeding the solubility of certain salts and depositing

The texture of scale is relatively dense, which greatly reduces the heat transfer efficiency. A scale thickness of 0.6 mm reduces the heat transfer coefficient by 20%.

(2) Dirt: Dirt is mainly composed of organic matter in water, microbial colonies and secretions, sediment, dust, etc. The texture of the scale is soft, which not only reduces the heat transfer efficiency but also causes corrosion under the scale, shortening the service life of the equipment

(3) Corrosion: The corrosion of heat exchange equipment by circulating water is mainly galvanic corrosion, which is caused by equipment manufacturing defects, sufficient oxygen in water, corrosive ions (Cl-, Fe2+, Cu2+) in water and mucus secreted by microorganisms. The consequences of corrosion are very serious due to factors such as dirt generated, and even if the heat exchanger and water pipeline equipment are scrapped in a very short period of time without control

(4) Microbial slime: Because there are sufficient oxygen, suitable temperature and eutrophic conditions dissolved in circulating water, it is very suitable for the growth and reproduction of microorganisms. If it is not controlled in time, it will quickly lead to deterioration of water quality, odor, blackening, and a large number of cooling towers. Scale deposits or even blockage, the cooling effect is greatly reduced, and the corrosion of equipment is intensified

[0005] 1. Low corrosion and scale inhibition rate;

[0006] 2. Bacteria and algae are prone to drug resistance;

[0007] 3. The dirt that has formed cannot be removed, and will continue to corrode equipment and pipelines

[0008] If the water quality stabilization treatment method is improper, it will even have the opposite effect, which will eventually lead to the loss of control of the circulating water index

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