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

Scale inhibitor specially used for seawater circulating cooling water

A technology of circulating cooling water and antiscalant, which is applied in the field of antiscalant and can solve problems such as prominent scaling

Inactive Publication Date: 2011-02-02
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
View PDF1 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and provide a high-efficiency scale inhibitor specially used in the seawater circulating cooling water system to solve the problem that the scaling phenomenon is very prominent

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
  • Scale inhibitor specially used for seawater circulating cooling water
  • Scale inhibitor specially used for seawater circulating cooling water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Scale inhibitor composition: polyacrylic acid 25%; methyl acrylate 30%; hydrolyzed polymaleic anhydride 20%; polyaspartic acid 15%; 2-epoxypropyl dodecyl dimethyl quaternary ammonium salt 10%.

[0016] 2) Purpose of the test: to evaluate the scale inhibition performance of the scale inhibitors through the static calcium carbonate deposition test.

[0017] 3) Test solution: simulated circulating water preparation (Ca 2+ Concentration is ρ 1 ).

[0018] 4) Test method:

[0019] Refer to "GB / T16632-2008 Calcium Carbonate Deposition Method for Determination of Scale Inhibition Performance of Water Treatment Agents".

[0020] Add different doses of antiscalant to each prepared simulated circulating water, and leave a blank sample at the same time. Immerse these samples in a constant temperature water bath at about 80°C (the liquid level of the test solution should not be higher than that of the water bath), and keep the temperature constant for 10 hours. After cooli...

Embodiment 2

[0031] 1) Scale inhibitor composition: polyacrylic acid 20%; ethyl acrylate 25%; hydrolyzed polymaleic anhydride 30%; polyaspartic acid 20%; 2-epoxypropyl dodecyl dimethyl quaternary ammonium salt 5%.

[0032] 2) Purpose of the test: to evaluate the scale inhibition performance of the scale inhibitors through the static calcium carbonate deposition test.

[0033] 3) Test solution: simulated seawater circulating water preparation (Ca 2+ Concentration is ρ 1 ).

[0034] 4) Test method:

[0035] See Example 1.

[0036] 5) Analysis and expression of test results:

[0037] The relative scale inhibition performance (N) of the water treatment agent expressed as a percentage is calculated according to the following formula:

[0038] N=(ρ 2 -ρ 3 ) / (ρ 1 -ρ 3 )×100%

[0039] where ρ 1 ——Calcium ions (Ca 2+ ) concentration, mg / mL;

[0040] ρ 2 ——Calcium ions (Ca 2+ ) concentration, mg / mL;

[0041] ρ 3 — Calcium ions (Ca 2+ ) concentration, mg / mL.

[0042] 6) Test recor...

Embodiment 3

[0046] Scale inhibitor composition: polyacrylic acid 25%; butyl acrylate 30%; hydrolyzed polymaleic anhydride 15%; polyaspartic acid 15%; 2-epoxypropyl dodecyl dimethyl quaternary ammonium salt 15% .

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

No PUM Login to View More

Abstract

At present, most scale inhibitor of fresh water contains phosphorus so as to be not environment-friendly, and when the existing non-phosphorus scale inhibitor of the fresh water is applied to seawater, the scale inhibition efficiency is low since the water quality of the seawater is more different from that of the fresh water. The invention discloses a scale inhibitor specially used for a seawater circulating cooling water system, which is characterized by comprising the components by weight percent: 20-40% of polyacrylic acid (PAA), 20-35% of acrylate copolymer, 10-30% of hydrolytic polymaleic anhydride, 10-20% of polyaspartic acid and 5-15% of surface active agent. The invention uses monomers to form non-phosphorus component which is the non-phosphorus scale inhibitor and is in accordance with the environmental protection requirements; and the invention has the characteristic of high efficiency in scale inhibition, and leads the fresh water to be replaced by the seawater which is taken as industrial circulating cooling water and is popularized and applied.

Description

technical field [0001] The invention relates to a scale inhibitor specially used in a seawater circulating cooling water system. Background technique [0002] The use of seawater in industrial circulating cooling water systems is a new energy-saving and environmental protection technology that has only begun to develop in China in recent years. Since the oxygen content of seawater is much higher than that of ordinary fresh water, the scale-forming calcium and magnesium ions in the water are also much larger than those in the fresh water system. The fouling phenomenon on the heat exchange tube of the condenser in the cooling water system is very prominent. Most of the antiscalants currently used in fresh water contain phosphorus and are not environmentally friendly. However, when the existing non-phosphorus antiscalants for fresh water are used in seawater, the scale inhibition efficiency is low due to the large difference between the water quality of seawater and fresh wate...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
Inventor 祝郦伟钱洲亥张益罗韶辉朱介南李稷臣
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com