Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite corrosion and scale inhibitor for reclaimed water as circulating cooling water of power plant

A technology of circulating cooling water, corrosion and scale inhibitor, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc. The requirements of concentration rate operation, the difficulty of corrosion and scale inhibitor to achieve the effect of corrosion and scale inhibition, etc., to achieve the effect of less dosage, scientific and reasonable ratio and process, and easy availability of raw materials

Inactive Publication Date: 2013-02-13
TIANJIN UNIV
View PDF5 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used corrosion and scale inhibitors are mostly developed for the water quality of traditional water sources, but the water quality of reclaimed water is different from that of traditional water sources. , When the content of chloride ions is high, it is difficult for the existing corrosion and scale inhibitors to achieve good corrosion and scale inhibition effects, and it is also difficult to meet the requirements of high concentration ratio operation of the circulating water system
In addition, traditional corrosion and scale inhibitors are mostly traditional phosphorus-based formulas with high phosphorus content, and the large discharge of phosphorus elements can easily lead to eutrophication of water bodies

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite corrosion and scale inhibitor for reclaimed water as circulating cooling water of power plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Composition (mass percentage) and theoretical phosphorus content of composite corrosion and scale inhibitors:

[0023] Organic phosphine (2-phosphonic acid butane-1,2,4-tricarboxylic acid) 10%, dispersant (acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer) 10%, zinc salt (sulfuric acid Zinc) 1%, molybdate (sodium molybdate) 16%, water 63%; theoretical phosphorus content (calculated as P, mass fraction): 1.15%.

[0024] experimental method:

[0025] The corrosion inhibition performance was measured with reference to "GB / T 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotating Coupon Method", and the coupon materials used in the experiment were Q235 carbon steel and 316L stainless steel. Hang three pieces of each material, and the results are averaged.

[0026] Determination of scale inhibition performance refers to "GB / T 16632-2008 Calcium Carbonate Deposition Method for Determination of Scale Inhibition Perfor...

Embodiment 2

[0031] Composition (mass percentage) and theoretical phosphorus content of composite corrosion and scale inhibitors:

[0032] Organic phosphine (2-phosphonic acid butane-1,2,4-tricarboxylic acid) 10%, organic phosphine (hydroxyethylidene diphosphonic acid) 2%, dispersant (acrylic acid-2-acrylamide-2-methyl propanesulfonic acid copolymer) 15%, zinc salt (zinc sulfate) 2%, molybdate (sodium molybdate) 18%, copper corrosion inhibitor (benzotriazole) 2%, water 51%; theoretical phosphorus Amount (in terms of P, mass fraction): 1.75%.

[0033] experimental method:

[0034] Corrosion inhibition performance was measured with reference to "GB / T 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotating Coupon Method", and the materials for the test coupons were Q235 carbon steel, H62 brass and 316L stainless steel. Hang three pieces of each material, and the results are averaged.

[0035] Determination of scale inhibition performance refers to...

Embodiment 3

[0040] Composition (mass percentage) and theoretical phosphorus content of composite corrosion and scale inhibitors:

[0041] Organic phosphine (2-phosphonic acid butane-1,2,4-tricarboxylic acid) 10%, dispersant (acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer) 12.5%, zinc salt (sulfuric acid Zinc) 1%, molybdate (sodium molybdate) 16%, water 60.5%; theoretical phosphorus content (calculated as P, mass fraction): 1.15%.

[0042] experimental method:

[0043] The corrosion inhibition performance was measured with reference to "GB / T 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotating Coupon Method", and the coupon materials used in the experiment were Q235 carbon steel and 316L stainless steel. Hang three pieces of each material, and the results are averaged.

[0044] Determination of scale inhibition performance refers to "GB / T 16632-2008 Calcium Carbonate Deposition Method for Determination of Scale Inhibition Pe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Total alkalinityaaaaaaaaaa
Corrosion rateaaaaaaaaaa
Hardnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a composite corrosion and scale inhibitor for reclaimed water as circulating cooling water of a power plant, in particular to a low-phosphorous high-efficiency composite corrosion and scale inhibitor for the reclaimed water for the circulating cooling water system of the power plant, comprising the following components by weight: 10%-12% of organic phosphine, 10%-15% of dispersant, 1%-2% of zinc salt, 16%-18% of molybdate, 0-2% of copper corrosion inhibitor and water. When the composite corrosion and scale inhibitor is used for the condition that the outgoing water of a reclaimed water plant is used as the circulating water system of the water supplement of the circulating cooling water of the power plant and the concentration ratio is 4, the amount of usage is about 20mg / L according to the water supplement, the corrosion rates of carbon steel, copper and stainless steel are all lower than the national standards (the corrosion rate of the carbon steel is 0.075mm / a, the corrosion rate of the copper is 0.005mm / a, and the corrosion rate of the stainless steel is 0.005mm / a), and yearly fouling resistance is 0.88 (+ / -0.05)*10<-4>m<2>.DEG C / W, which satisfy the design requirement of 'GB50050-2007 Design Code for Industrial Circulating Cooling Water Treatment'.

Description

technical field [0001] The invention relates to a water quality stabilizer for a circulating cooling water system, in particular to a low-phosphorus and high-efficiency composite corrosion and scale inhibitor for reclaimed water for the circulating cooling water system of a power plant. Background technique [0002] As a typical industrial user with high water consumption, the water consumption of the power plant’s circulating cooling system accounts for about 70% to 80% of the total water consumption. Using reclaimed water as a supplementary water source for its circulating cooling system can greatly reduce the use of conventional water sources and achieve large-scale The purpose of saving water. [0003] Corrosion and scale inhibitors are a kind of water treatment agent commonly used in circulating cooling systems. They are used to alleviate the corrosion and scaling of circulating water on water pumps, pipelines, condensers and other equipment in circulating cooling syste...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F5/14
Inventor 田一梅郭浩刘骋王佳黄建军马媛孟露
Owner TIANJIN UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com