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Preparation method of special antiscaling and dispersing agent for seawater circulating cooling water

A scale inhibitor dispersant and circulating water technology, applied in water/sludge/sewage treatment, scale removal and water softening, chemical instruments and methods, etc., can solve water eutrophication, high salt content, sticky mud, Problems such as poor dirt dispersion

Active Publication Date: 2017-03-29
TIANJIN ZHENGDA SCI &TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high salt content of seawater, it is used as industrial replenishment water, and crystallization and fouling deposition are more likely to occur during the heat exchange process, resulting in a decrease in heat exchange efficiency and even blockage of pipes. It is important to develop efficient scale inhibitors and dispersants to control system fouling. The key to ensuring the safe operation of the seawater circulation system. In addition, in order to protect the ecological environment in the sea area, prevent eutrophication of the water body, and maintain ecological balance, the scale inhibitors used must have environmental protection characteristics such as phosphorus-free and biodegradable.
[0004] The traditional anti-scaling and dispersing agent is mainly based on the formula of organic phosphine, which will cause eutrophication of water body during use, damage the sea environment, and have poor dispersing effect on slime and dirt. In order to solve the above problems, we have developed a phosphorus-free It is an environment-friendly product and can be biodegraded. It can effectively control the precipitation of crystals and the deposition of dirt when used in supplementary water at a concentration of 10-15mg / L, and has a good effect on microbial slime and particulate matter. Excellent dispersion, dirt adhesion rate 2 Month, dirt thermal resistance -4 m 2 K / W, much better than the requirements of GB / T23248-2009 "Code for Design of Seawater Circulating Cooling Water Treatment"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add the following components sequentially in a certain proportion (mass concentration of effective components) into the stirred reactor, and keep fully stirring, control the reaction temperature below 60°C by cooling water, add deionized water as the solvent and add in the balance, fatty alcohol Polyoxyethylene ether 2%, sodium carboxymethyl cellulose 0.2%, ultra-low molecular weight (within 1000) polyacrylic acid 10%, terpolymer AA / AMPS / hydroxypropyl methacrylate (with tracer group) 6%, polyepoxysuccinic acid 20%, after mixing evenly, filter to obtain the product.

[0014] Evaluate the product according to the HG / T2160-2008 standard of "Cooling Water Dynamic Simulation Test Method". When the concentration in replenishment water is 15mg / L, the dirt adhesion rate will be less than 9.3mg / cm in 3 times operation. 2 Month, dirt thermal resistance -4 m 2 K / W. Better than the requirements in GB / T23248-2009 of "Code for Design of Seawater Circulating Cooling Water Treatment"...

Embodiment 2

[0016] Add the following components sequentially in a certain proportion (mass concentration of effective components) into the stirred reactor, and keep fully stirring, control the reaction temperature below 60°C by cooling water, add deionized water as the solvent and add in the balance, fatty alcohol Polyoxyethylene ether 10%, sodium carboxymethyl cellulose 1%, polymaleic acid 4%, terpolymer AA / AMPS / hydroxypropyl acrylate copolymer (with tracer group) 2%, polyaspart Amino acid 10%, mix evenly and filter to obtain the product.

[0017] Evaluate the product according to the HG / T2160-2008 standard of "Cooling Water Dynamic Simulation Test Method". When the concentration in replenishment water is 15mg / L, the dirt adhesion rate will be less than 9.0mg / cm when it runs 3 times 2 Month, dirt thermal resistance -4 m 2 K / W. Better than the requirements in GB / T23248-2009 of "Code for Design of Seawater Circulating Cooling Water Treatment": dirt adhesion rate 2 Month, dirt thermal res...

Embodiment 3

[0019] Add the following components sequentially in a certain proportion (mass concentration of effective components) into the stirred reactor, and keep fully stirring, control the reaction temperature below 60°C by cooling water, add deionized water as the solvent and add in the balance, fatty alcohol Polyoxyethylene ether 7%, sodium carboxymethyl cellulose 0.6%, polymaleic acid 9%, terpolymer AA / AMPS / methyl methacrylate (with tracer group) 5%, polyaspartic acid Acid 17%, mixed evenly and filtered to obtain the product.

[0020] Evaluate the product according to the HG / T2160-2008 standard of "Cooling Water Dynamic Simulation Test Method". When the concentration in replenishment water is 15mg / L, it will run at 3.0 times, and the dirt adhesion rate will be less than 8.3mg / cm 2 Month, dirt thermal resistance - 4 m 2 K / W. Better than the requirements in GB / T23248-2009 of "Code for Design of Seawater Circulating Cooling Water Treatment": dirt adhesion rate 2 Month, dirt thermal...

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PUM

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Abstract

The invention relates to a preparation method of a non-phosphorus environment-friendly dirt dispersion agent special for seawater circulating cooling water. The preparation method is characterized by comprising the following steps: according to a certain proportion, adding fatty alcohol-polyoxyethylene ether, natural polymer starch, chitosan or carboxymethylcellulose in deionized water as a solvent, after full stirring and dissolving, adding carboxylic acid homopolymer polyacrylic acid or polymaleic acid with the molecular weight of within 1000, then adding a terpolymer dispersing agent with a tracer perssad, after full stirring, adding polyepoxysuccinic acid or polyaspartic acid, and obtaining the finished product after stirring and full mixing. The terpolymer dispersing agent is a copolymer of acrylic acid (AA), hydroxypropyl methacrylate and 2-acrylamido-2-methyl propane sulfonic acid (AMPS); during the entire reaction process, the reaction temperature is controlled to be 60 DEG C or below through cooling water.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, and is a preparation method of a special antiscaling and dispersing agent for seawater circulating water. Specifically, it relates to a system using seawater as circulating cooling water. The preparation method of non-phosphorus scale anti-scaling dispersant attached to mud. Background technique [0002] With the development of industry, industrial cooling water consumes a large amount of fresh water resources all the time. The scarcity of fresh water resources has attracted widespread attention in the world. Water conservation and rational use of water resources have become the focus of international urban development research. Seawater replaces fresh water as industrial water, which can alleviate the shortage of fresh water and is an important way to solve the crisis of fresh water resources. [0003] However, due to the high salt content of seawater, it is used as industria...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10C02F5/12
Inventor 潘旭东王向明左鹏刘晔
Owner TIANJIN ZHENGDA SCI &TECH CO LTD