Low-phosphorus scale and corrosion inhibitor for recycling reclaimed water

Abstract

The invention discloses a low-phosphorus scale and corrosion inhibitor for recycling reclaimed water. The scale and corrosion inhibitor comprises the following components by weight: 10-15 parts of triethylene tetramine, 20-30 parts of maleic anhydride, 6-8 parts of phosphonic acid-based polycarboxylic acid, 6-8 parts of an acrylic acid-hydroxypropyl acrylate copolymer, 3-5 parts of formaldehyde, 9-11 parts of nitromalonic acid, 4-6 parts of a zinc salt, 5-10 parts of an ammonium salt, 2-3 parts of molybdate, 1-2 parts of tungstate, 6-10 parts of sodium hydroxide, 50-60 parts of deionized water, 2-4 parts of an initiator and 2-3 parts of a stable synergist. The corrosion and scale inhibitor disclosed by the invention is simple to prepare and low in cost, the corrosion inhibitor component islow in phosphorus content, the inhibitor is non-toxic, green, environment-friendly, good in biodegradability and small in usage amount, has good scale inhibition capability on high-hardness and high-alkali water easy to scale, has good corrosion inhibition capability on low-hardness and low-alkali water easy to corrode, and is good in corrosion and scale inhibition effect.

Description

technical field [0001] The invention relates to the technical field of corrosion and scale inhibitors, in particular to a low-phosphorus scale and corrosion inhibitor for reclaimed water reuse. Background technique [0002] With the development of economy and technology, the demand for water around the world is increasing day by day, and water shortage has become a prominent problem. In order to solve the problem of water shortage, the reuse of reclaimed water has been paid more and more attention by people. Reasonable reuse of reclaimed water can not only reduce water environment pollution, but also alleviate the contradiction of water resources, which is an important measure to implement sustainable development. Industrial water accounts for a very large proportion of human water, and cooling water accounts for 60-70% of industrial water. The reuse of reclaimed water in circulating cooling water systems has also been widely used in my country. [0003] In the process of...

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Problems solved by technology

[0003] In the process of reclaimed water reuse, it is necessary to add scale and corrosion inhibitors. The existing scale and corrosion inhibitors are still based on phosphorus-containing formulas, but the use of phosphorus-containing compounds leads to eutrophication of water quality, which promotes microorganisms, especially The excessive reproduction of algae, the rate of organic matter production far exceeds the rate of consumption, the accumulation of organic matter in the water body, and the destruction of the ecological balance of the water body

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