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

Compound scale inhibitor for treating recirculated cooling water and preparation method thereof

A technology for treating circulating and cooling water, which is applied in the field of industrial water treatment, can solve problems such as secondary pollution, achieve the effects of less usage, lower operating costs, and convenient use

Inactive Publication Date: 2009-09-02
SHANGHAI UNIV +1
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the water treatment agents commonly used in the industry contain phosphorus. In order to avoid secondary pollution caused by water treatment agents to the environment, research on new green water treatment agents has become a trend.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Preparation of the compound antiscalant: After heating 1L of water to 70°C, add 10mg of PASP into it and dissolve to make the base solution. Then add 3mg HEDP, 3mgATMP, and 3mg polyol phosphate into it and stir evenly, the stirring speed is kept at 300 rpm; the pH value is controlled around 9; stand for 2 hours.

[0015] Prepare Ca2+=800mg / l, HCO 3 - = 1200 mg / l water quality.

[0016] Using the scale inhibitor and water quality of this example to carry out the static scale inhibition test, when the concentration factor is 3 times, the scale inhibition rate of calcium carbonate scale is 89%.

Embodiment 2

[0018] Preparation of the compound antiscalant: After heating 1L of water to 70°C, add 15mg of PASP into it and dissolve to make the base solution. Then add 4mg HEDP, 2mgATMP, and 3mg polyol phosphate, and stir evenly, the stirring speed is kept at 300 rpm; the pH value is controlled around 9; stand for 4 hours.

[0019] Prepare Ca2+=800mg / l, HCO 3 - = 1200 mg / l water quality.

[0020] Using the scale inhibitor and water quality of this example to carry out the static scale inhibition test, when the concentration ratio is 4 times, the scale inhibition rate of calcium carbonate scale is 92%.

Embodiment 3

[0022] Preparation of the compound antiscalant: After heating 1L of water to 70°C, add 15mg of PASP into it and dissolve to make the base solution. Then add 5 mg HEDP, 3 mg ATMP, and 3 mg polyol phosphate, and stir evenly, the stirring speed is kept at 300 rpm; the pH value is controlled around 9; stand for 3 hours.

[0023] Prepare Ca2+=1000mg / l, HCO 3 - = 1400 mg / l water quality.

[0024] Using the scale inhibitor and water quality of this example to carry out the static scale inhibition test, when the concentration factor is 3 times, the scale inhibition rate of calcium carbonate scale is 96%.

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

The invention discloses a compound scale inhibitor for treating recirculated cooling water and a preparation method thereof. The scale inhibitor consists of polyaspartic acid and three or more HEDP, ATMP, SHMP, PESA, and PAPE, wherein the PASP is between 10 and 25 mg / L, the HEDP is between 1 and 10 mg / L, the ATMP is between 1 and 5 mg / L, the PESA is between 1 and 10 mg / L, the SHMP is between 1 and 5 mg / L, and the PAPE is between 1 and 5 mg / L. During the preparation of the compound scale inhibitor, the polyaspartic acid is added first, and then other materials are added into the polyaspartic acid; the heating temperature is between 60 and 80 DEG C, the stirring speed is 300 r / m, and the pH value is between 8.1 and 10.2; and the obtained product is kept stand for 1 to 6 hours. The compound scale inhibitor has excellent scale-inhibiting property and belongs to a low phosphorous formula, the formation rate of calcium phosphate scale is extremely low during the use, wastewater discharged by the formula cannot cause eutrophication pollution to the environment, and the compound scale inhibitor belongs to an environment-friendly product and is particularly suitable for the treatment of recirculated water with high calcium hardness and high alkali hardness.

Description

technical field [0001] The invention relates to a green water treatment agent, in particular to a compound scale inhibitor for treating circulating cooling water and a preparation method thereof, belonging to the technical field of industrial water treatment. Background technique [0002] From the requirements of environmental protection and sustainable development, "greening" is undoubtedly an important trend in the development of water treatment agents in the 21st century. In industry, industrial circulating cooling water is a large water user. Whether it is chemical industry, metallurgy, thermal power generation or large-scale central air conditioning, circulating water is used for heat exchange. Therefore, improving the use efficiency of industrial or civil circulating water will save water resources and reduce Production costs and enhanced environmental protection are of great significance. [0003] Common water treatment agents in industry include: (1) Polyphosphates....

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): C02F5/08
Inventor 林海钟庆东王超盛敏奇周琼宇陈大洋
Owner SHANGHAI UNIV
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