Application of carbon steel corrosion inhibitor in transmission and distribution of regenerated water heat supply network

A technology for reclaimed water and corrosion inhibitor, applied in the field of water treatment, can solve the problems of high phosphorus and zinc content, high price, and can not meet the quality requirements of the recycled water at the end of the pipe network, so as to reduce the amount of phosphorus and zinc, improve the corrosion inhibition effect, and reduce corrosion. significant effect

Pending Publication Date: 2022-04-01
自然资源部天津海水淡化与综合利用研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the carbon steel corrosion inhibitor in Example 5 has a good corrosion inhibition effect and is economically acceptable, the content of phosphorus and zinc is obviously high, which cannot meet the water quality requirements of the regenerated water at the end of the pipe network
[0006] CN111139384A discloses a composite corrosion inhibitor applied to low-carbon steel, which is composed of sodium molybdate, sodium silicate,

Method used

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  • Application of carbon steel corrosion inhibitor in transmission and distribution of regenerated water heat supply network
  • Application of carbon steel corrosion inhibitor in transmission and distribution of regenerated water heat supply network

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] This example provides a carbon steel corrosion inhibitor in the regenerated hydraulic hot mesh transmission, and the components of the carbon steel corrosion inhibitor are added to the regenerated water by hot mesh, and the mix is ​​mixed into regenerated water, wherein The concentration of the carbon steel corrosion inhibitor and its concentration in regeneration water is as follows: hydrolyzed polymeric acid is 5 mg / L, acrylic acid and 2-acrylamide-2-methylpropulfonic acid copolymer 2 mg / L, Nine hydrated sodium silicate is 15 mg / L, sodium gluconate is 2 mg / L, 2 mg / L of seven water sulfate 2mg / L, 2-hydroxyphosphonic acid 1 mg / L.

Example Embodiment

[0030] Example 2

[0031] This example provides a carbon steel corrosion inhibitor in the regenerated hydraulic hot mesh transmission, and the components of the carbon steel corrosion inhibitor are added to the regenerated water by hot mesh, and the mix is ​​mixed into regenerated water, wherein The carbon steel corrosion inhibitor each and its concentration in regenerated water is as follows: hydrolyzed polymeric acid is 8 mg / L, acrylic acid and 2-acrylamide-2-methylpropulfonic acid copolymer 2 mg / L, Nine hydrated sodium silicate is 10 mg / L, sodium gluconate is 1 mg / L, zinc sulfate 2mg / L, 2-hydroxyphonic acid 1 mg / L.

Example Embodiment

[0032] Example 3

[0033] This example provides a carbon steel corrosion inhibitor in the regenerated hydraulic hot mesh transmission, and the components of the carbon steel corrosion inhibitor are added to the regenerated water by hot mesh, and the mix is ​​mixed into regenerated water, wherein The concentration of the carbon steel corrosion inhibitor and its concentration in regenerated water is as follows: hydrolyzed polymeric acid is 4 mg / L, acrylic acid and 2-acrylamide-2-methylpropulfonic acid copolymer 1 mg / L, Nine hydrated sodium silicate is 15 mg / L, sodium gluconate is 4 mg / L, zinc sulfate 3mg / L, 2-hydroxyphosphonic acid 2 mg / L.

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Abstract

The invention discloses an application of a carbon steel corrosion inhibitor in transmission and distribution of a regenerated water heat supply network. The method specifically comprises the steps that reclaimed water is conveyed and distributed through a heat supply network, all components of the carbon steel corrosion inhibitor are added into the reclaimed water to be evenly stirred, and the carbon steel corrosion inhibitor is prepared from, by concentration, 3-12 mg/L of hydrolytic polymaleic acid, 1-4 mg/L of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid copolymer, 5-20 mg/L of sodium silicate nonahydrate, 1-6 mg/L of sodium gluconate and 2-3 mg/L of zinc sulfate heptahydrate. And 1 to 2 mg/L of 2-hydroxyphosphonoacetic acid. The recycled water is conveyed and distributed through the idle heat supply network, the capital construction cost for laying a recycled water pipe network is greatly saved, meanwhile, the carbon steel corrosion inhibitor is used in the recycled water, the content of total phosphorus and zinc ions is low, corrosion of the heat supply network is remarkably relieved, the water quality of the recycled water at the tail end of the pipe network meets the greenbelt irrigation requirement, the recycled water is fully utilized, and water resource shortage is relieved; and the method has obvious environmental, economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to the application of a carbon steel corrosion inhibitor in transmission and distribution of regenerated water heating networks. Background technique [0002] Sewage recycling is of great significance to alleviate the contradiction between supply and demand of water resources and promote the sustainable development of urban economy and society. However, the large-scale laying of recycled water pipe network infrastructure in cities is costly, difficult and time-consuming. The lack of transmission and distribution network has become a bottleneck that inhibits the large-scale utilization of reclaimed water. [0003] At the same time, reclaimed water will also cause corrosion to the transmission and distribution pipeline network during the transmission and distribution process, which will not only affect the service life of the transmission and distribution pipeline...

Claims

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Application Information

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IPC IPC(8): C02F5/14C23F11/08
Inventor 崔振东高丽丽靳亚鹏焦春联郭浩成国辰尹建华王维珍
Owner 自然资源部天津海水淡化与综合利用研究所
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