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Phosphorus-free corrosion and scale inhibitor for industrial sewage reuse technology and preparation method thereof

A phosphorus-free corrosion inhibition and industrial sewage technology, applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc., can solve the problem of increasing corrosion under scale, adsorption consumption, increase of biological slime, etc. problems, to achieve the effects of enhanced coordination and synergy, excellent corrosion inhibition, and easy biodegradation

Active Publication Date: 2022-04-01
鞍钢栗田(鞍山)水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of industry, it is very necessary to save water in industry. At present, most enterprises have adopted industrial sewage reuse technology, which can greatly improve the reuse rate of industrial water, and save new water every year through sewage reuse technology. Millions of tons, but due to the use of recycled water as supplementary water, the water quality is poor, the mineral content in the water is high, the total iron generally exceeds 1mg / l, and part of the recycled water also contains oil. Time will lead to accelerated corrosion, scaling and microbial growth of equipment and pipelines. For such circulating water systems, phosphorus-based corrosion and scale inhibitors are mostly used, while non-phosphorus corrosion and scale inhibitors are rarely used
[0003] Phosphorus-based corrosion and scale inhibitors can be used in circulating water systems where recycled water is used as supplementary water, and have achieved excellent corrosion and scale inhibition effects. Scale inhibitors, microorganisms grow faster in circulating water, and biological slime increases, which increases the risk of corrosion under the scale. At present, phosphorus-based corrosion and scale inhibitors are still affected by the current environmental protection policies. The discharge standards of phosphorus in external drainage continue to increase. Phosphorus-based corrosion and scale inhibitors are gradually emerging. The advantage of phosphorus-free corrosion and scale inhibitors is that they are green and environmentally friendly. The disadvantage is that the effect of corrosion and scale inhibition is low, especially when the water quality is poor. Consumed by adsorption, the corrosion and scale inhibition properties are greatly affected

Method used

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  • Phosphorus-free corrosion and scale inhibitor for industrial sewage reuse technology and preparation method thereof
  • Phosphorus-free corrosion and scale inhibitor for industrial sewage reuse technology and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] The specific preparation method of the phosphorus-free corrosion and scale inhibitor used in industrial sewage reuse technology in this embodiment is as follows:

[0034] 1) To prepare an alkaline aqueous solution, take 12 parts of sodium hydroxide and 60 parts of water to dissolve each other, and keep stirring for more than 15 minutes to obtain an alkaline aqueous solution;

[0035] 2) Continue to add 22 parts of sodium metasilicate pentahydrate, 12 parts of sodium polyacrylate, 20 parts of sodium humate and 22 parts of sodium polystyrene sulfonate into the prepared alkaline aqueous solution, and continue stirring for more than 30 minutes;

[0036] 3) Then add the remaining 6 parts of sodium hydroxide and 13 parts of rare earth metal salt to the solution prepared in the above step 2), continue to stir for more than 40 minutes, and transfer the evenly mixed mixture into a pressure vessel, set the pressure to 1.5MPa, and the temperature After continuing to mix and stir f...

Embodiment 2

[0038] The specific preparation method of the phosphorus-free corrosion and scale inhibitor used in industrial sewage reuse technology in this embodiment is as follows:

[0039] 1) To prepare an alkaline aqueous solution, take 14 parts of sodium hydroxide and 55 parts of water to dissolve each other, and keep stirring for more than 15 minutes to obtain an alkaline aqueous solution;

[0040] 2) Continue to add 10 parts of sodium metasilicate pentahydrate, 5 parts of sodium polyacrylate, 15 parts of sodium humate and 25 parts of sodium polystyrene sulfonate into the prepared alkaline aqueous solution, and continue to stir for more than 30 minutes;

[0041] 3) Then add the remaining 7 parts of sodium hydroxide and 24 parts of rare earth metal salt into the solution prepared in the above step 2), continue to stir for more than 40 minutes, and transfer the evenly mixed mixture into a pressure vessel, set the pressure at 1.8MPa, At a temperature of 60°C, continue mixing and stirring...

Embodiment 3

[0043] The specific preparation method of the phosphorus-free corrosion and scale inhibitor used in industrial sewage reuse technology in this embodiment is as follows:

[0044] 1) To prepare an alkaline aqueous solution, take 10 parts of sodium hydroxide and 70 parts of water to dissolve each other, and keep stirring for more than 15 minutes to obtain an alkaline aqueous solution;

[0045] 2) Continue to add 18 parts of sodium metasilicate pentahydrate, 10 parts of sodium polyacrylate, 30 parts of sodium humate and 15 parts of sodium polystyrene sulfonate into the prepared alkaline aqueous solution, and continue stirring for more than 30 minutes;

[0046] 3) Then add the remaining 5 parts of sodium hydroxide and 18 parts of rare earth metal salt to the solution prepared in the above step 2), continue to stir for more than 40 minutes, and transfer the evenly mixed mixture into a pressure vessel, set the pressure at 2.5MPa, At a temperature of 80°C, continue mixing and stirring f...

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Abstract

The invention provides a non-phosphorous corrosion and scale inhibitor for industrial sewage reuse technology and a preparation method thereof. The composition and parts by weight of the non-phosphorous corrosion and scale inhibitor are: sodium metasilicate pentahydrate: 7 Parts-25 parts, sodium polyacrylate: 2 parts-18 parts, rare earth metal salt: 5 parts-25 parts, sodium humate: 15 parts-35 parts, sodium polystyrene sulfonate: 5 parts-25 parts, hydrogen Sodium oxide: 10-30 parts, water: 45-85 parts. The present invention adopts sodium metasilicate pentahydrate, rare earth metal salt, sodium humate and sodium polystyrene sulfonate as the main components of the composite agent, and through the fusion of each component, the coordination and synergistic effect is enhanced, so that It has high corrosion inhibition and high scale inhibition. Each component of the composite agent adopts low-toxic and non-polluting green medicaments, and does not contain phosphorus and zinc and does not pollute the environment after being discharged, which belongs to green and environmental protection medicaments.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a phosphorus-free corrosion and scale inhibitor used in industrial sewage reuse technology and a preparation method thereof. Background technique [0002] With the rapid development of industry, it is very necessary to save water in industry. At present, most enterprises have adopted industrial sewage reuse technology, which can greatly improve the reuse rate of industrial water, and save new water every year through sewage reuse technology. Millions of tons, but due to the use of recycled water as supplementary water, the water quality is poor, the mineral content in the water is high, the total iron generally exceeds 1mg / l, and part of the recycled water also contains oil. Time will lead to accelerated corrosion, scaling and microbial growth of equipment and pipelines. For such circulating water systems, phosphorus-based corrosion and scale inhibitors are mostly used, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10C02F5/08
CPCC02F5/105
Inventor 张柏鸿胡文军孙辉王坤鹏李俊峰李红陈奇陈丽鹏褚运伟
Owner 鞍钢栗田(鞍山)水处理有限公司
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