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A kind of low-phosphorus corrosion-inhibiting composite scale inhibitor and its application

A composite scale inhibitor and corrosion inhibition technology, applied in complex/solubilizer treatment, scale removal and water softening, natural water treatment, etc. Low volume and corrosion-reducing effect

Active Publication Date: 2022-07-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application process, for the highly corrosive circulating water quality, the effect of the phosphorus-free formula cannot meet the corrosion inhibition requirements

Method used

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  • A kind of low-phosphorus corrosion-inhibiting composite scale inhibitor and its application
  • A kind of low-phosphorus corrosion-inhibiting composite scale inhibitor and its application
  • A kind of low-phosphorus corrosion-inhibiting composite scale inhibitor and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example is used to illustrate the use method of the corrosion and scale inhibitor provided by the present invention.

[0036] Treatment: Add sodium polyepoxysuccinate, disodium hydroxyethylidene diphosphonate, nano calcium carbonate with an average particle size of 40nm, and zinc sulfate heptahydrate to the circulating water, so that the effective concentrations in the circulating water are 15mg / L, 1.5mg / L, 400mg / L, and 1mg / L (with Zn 2+ ), a dynamic simulation test was carried out.

[0037] The simulation test results are shown in Table 2.

Embodiment 2

[0039] This example is used to illustrate the use method of the corrosion and scale inhibitor provided by the present invention.

[0040] Treatment: add sodium polyepoxysuccinate, disodium hydroxyethylidene diphosphonate, nano calcium carbonate with an average particle size of 20nm, and zinc sulfate heptahydrate to the circulating water, so that the effective concentrations in the circulating water are 10mg / L, 1.2mg / L, 300mg / L, and 1.5mg / L (with Zn 2+ ), a dynamic simulation test was carried out.

[0041] The simulation test results are shown in Table 2.

Embodiment 3

[0043] This example is used to illustrate the use method of the corrosion and scale inhibitor provided by the present invention.

[0044] Treatment: Add sodium polyepoxysuccinate, disodium hydroxyethylidene diphosphonate, nano-calcium carbonate with an average particle size of 10nm, and zinc sulfate heptahydrate to the circulating water, so that the effective concentrations in the circulating water are 2mg / L, 2mg / L, 100mg / L, and 2mg / L (with Zn 2+ ), a dynamic simulation test was carried out.

[0045] The simulation test results are shown in Table 2.

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Abstract

The invention relates to the field of circulating cooling water, and relates to a low-phosphorus corrosion-inhibiting composite scale inhibitor and its application. Specifically, the low-phosphorus corrosion-inhibiting composite scale inhibitor provided by the present invention contains polyepoxysuccinate, organic phosphonate, nano-calcium carbonate and zinc salt. Using the low-phosphorus corrosion-inhibiting composite scale inhibitor provided by the invention can form a scouring-resistant dense film on the metal surface of the heat exchange tube, and can enhance the corrosion resistance of the metal surface of the heat exchange tube and reduce the deposition of scale during the operation of the circulating cooling water. Effectively protect the water cooler and prolong its service life. In addition, the low-phosphorus corrosion-inhibiting composite scale inhibitor provided by the present invention has a low phosphorus content, which will not cause the total phosphorus content in the circulating water sewage to exceed the efflux standard (1 mg / L in terms of P).

Description

technical field [0001] The invention belongs to the technical field of circulating cooling water, and particularly relates to a low-phosphorus corrosion-inhibiting composite scale inhibitor and an application thereof. Background technique [0002] The circulating cooling water system is a large consumer of water in industrial enterprises, and the water supply used for the circulating cooling water system is as high as 70% of the total industrial water consumption. The water cooler is an important equipment of the circulating cooling water system. The leakage of the water cooler not only affects the normal production of the device, but also pollutes the circulating cooling water system, leading to the deterioration of water quality, forcing the circulating water system to reduce the operating concentration ratio or a large amount of drainage and replenishment. , resulting in waste of water resources and environmental pollution. During the operation of circulating cooling wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/14C02F5/08C02F103/02
CPCC02F5/145C02F2303/08C02F2103/023
Inventor 李风亭郦和生
Owner TONGJI UNIV
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