Long-acting sustained-release scale and corrosion inhibitor for circulating water

Abstract

The invention aims to provide a long-acting sustained-release scale and corrosion inhibitor for circulating water. The long-acting sustained-release scale and corrosion inhibitor for circulating water is prepared from the following raw materials in percentage by weight: 30-52% of deionized water, 0.2-1% of guar gum, 4-6% of hydroxypropyl methylcellulose, 30-40% of an epoxy ethane-dicarboxylic acid-disodium salt homopolymer, 10-15% of a crylic acid- isopropenyl phosphonic acid copolymer, 4-6% of 5-benzyl-benzotriazole, 0.025-0.05% of 5-chloro-2-methyl-4-isothiazolin-3-one and 0.007-0.017% of 2-methyl-4-isothiazolin-3-one. The sustained-release scale and corrosion inhibitor prepared by the invention achieves a scale and corrosion inhibiting effect when being dissolved slowly, has a long acting time and achieves a good effect. In addition, the sustained-release scale and corrosion inhibitor is a solid agent and therefore the package and transportation cost is reduced.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a long-acting slow-release scale and corrosion inhibitor for circulating water. Background technique [0002] The cooling water is continuously circulated in the circulating water system. Due to the temperature rise of the water, the change of the water flow velocity, the evaporation of the water, the concentration of various inorganic ions and organic substances, the cooling tower and the cooling water pool are exposed to sunlight and wind blowing outdoors. The combined effect of various factors such as rain, dust and sundries, and equipment structure and materials will cause serious problems such as sediment adhesion and equipment corrosion, which will threaten and destroy the long-term safe production of the factory, and even cause economic damage. loss. [0003] Scaling in circulating water is actually a supersaturation phenomenon caused by the change of slightly soluble subst...

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Problems solved by technology

[0004] In order to prevent scaling in industrial circulating cooling water systems, the more common method is to add antiscalants to the cooling water continuously or impulsively every day. This addition method will increase the input of manpower and equipment virtually, and will increase with the loss of fluid. , so the amount added is large, and the action cycle and effect are not ideal

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