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High temperature resistant composite water treatment agent and preparation method thereof

A water treatment agent, high-level tank technology, applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc. Corrosion inhibition requirements, lack of high temperature resistance and other problems, to achieve excellent scale inhibition and dispersion performance, good corrosion inhibition effect, chemical stability and high thermal stability.

Active Publication Date: 2014-10-15
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of modern industry, the temperature of heat exchange medium water has been greatly increased. However, due to the existence of some defects in conventional water treatment agents, such as poor thermal stability, they do not have good high temperature resistance, and are prone to occur at higher temperatures. It is hydrolyzed, so that its scale inhibition effect decreases rapidly with the rise of temperature, so it cannot meet the requirements of scale inhibition and corrosion inhibition under high temperature conditions. Therefore, it is required that the water treatment agent used in high temperature medium water must have high temperature resistance, chemical stability and thermal stability. Outstanding stability, long-term use in high temperature medium without affecting its scale and corrosion inhibition effect

Method used

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  • High temperature resistant composite water treatment agent and preparation method thereof
  • High temperature resistant composite water treatment agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Pump 100kg of hydrolyzed polymaleic anhydride and 230kg of deionized water into the kettle from the valve at the bottom of the kettle by vacuum, and stir for 15 minutes.

[0036] 2. Close the vacuum valve of the reactor, open the vent valve, release 100kg of the mixed solution into a 200L open bucket, pour 20kg of sodium molybdate into the open bucket filled with the mixed solution, stir until there are no large pieces, use the vacuum to remove from the kettle The bottom valve is pumped into the kettle, and then the vacuum and bottom valve are closed.

[0037]3. Open the lid of the reactor, slowly pour 50kg of sodium gluconate into the kettle, and then close the lid.

[0038] 4. Pump 100kg of itaconic acid-sodium propylene sulfonate copolymer into the header tank Ⅰ by vacuum, then close the vacuum valve and vent.

[0039] 5. Pump 200kg of 2-acryloyl-2-methylpropylphosphonic acid-2-acryloyl-2-methylpropanesulfonic acid copolymer into the header tank II by vacuum, the...

Embodiment 2

[0043] 1. Pump 300kg of acrylic acid-maleic anhydride and 290kg of deionized water into the kettle from the valve at the bottom of the kettle by vacuum, and stir for 20 minutes.

[0044] 2. Close the vacuum valve of the reaction kettle, open the vent valve, release 120kg of the mixed solution into a 200L open barrel, pour 50kg of sodium tungstate into the open barrel with the mixed solution, stir until there are no large pieces, use the vacuum to remove from the kettle The bottom valve is pumped into the kettle, and then the vacuum and bottom valve are closed.

[0045] 3. Open the lid of the reactor, slowly pour 10kg of sodium gluconate into the kettle, and then close the lid.

[0046] 4. Pump 100kg of acrylic acid-2-acryloyl-2-methylpropanesulfonic acid-sodium hypophosphite copolymer into the header tank I by vacuum, then close the vacuum valve and vent.

[0047] 5. Pump 200kg of 2-acryloyl-2-methylpropylphosphonic acid-sodium styrene sulfonate copolymer into the header tank...

Embodiment 3

[0051] 1. Pump 200kg of hydrolyzed polymaleic anhydride and 280kg of deionized water into the kettle from the valve at the bottom of the kettle by vacuum, and stir for 10 minutes.

[0052] 2. Close the vacuum valve of the reactor, open the vent valve, release 150kg of the mixed solution into a 200L open bucket, pour 30kg of sodium molybdate into the open bucket filled with the mixed solution, stir until there are no large pieces, use the vacuum to remove from the kettle The bottom valve is pumped into the kettle, and then the vacuum and bottom valve are closed.

[0053] 3. Open the lid of the reactor, slowly pour 30kg of organic corrosion inhibitor sodium gluconate into the kettle, and then close the lid.

[0054] 4. Pump 150kg of acrylic acid-2-acryloyl-2-methylpropanesulfonic acid-sodium hypophosphite copolymer into the header tank I by vacuum, then close the vacuum valve and vent.

[0055] 5. Pump 110kg of 2-acryloyl-2-methylpropylphosphonic acid-2-acryloyl-2-methylpropane...

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Abstract

The invention provides a composite water treatment agent which is used for industrial recycling cooling water treatment, has an excellent CaCO3 scale inhibiting function and good corrosion inhibiting ability, and is particularly applicable to high temperature conditions as well as a preparation method of the composite water treatment agent. The composite water treatment agent provided by the invention is mainly prepared from raw materials such as organic polybasic phosphonic acid, hydrolytic polymaleic anhydride or acrylic acid-maleic anhydride, an inorganic salt corrosion inhibitor and an organic salt corrosion inhibitor. Compared with the prior art, the composite water treatment agent provided by the invention is very high in chemical stability and heat stability, and the scale inhibiting effect under the high temperature condition is guaranteed. The product, namely the composite water treatment agent provided by the invention, aiming at an industrial water system which is high in content of scale-forming ions and higher in medium temperature, can effectively prevent generation of calcium carbonate scales, permit higher operating temperature and bear considerably high total salt content and content of scale-forming ions, and is safe in production and implementation processes, and raw materials are easily obtained.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and relates to a water treatment agent and a preparation method thereof. Background technique [0002] Water resources are one of the important energy sources for economic development. In order to save water, the concentration ratio of circulating water is continuously increased, which makes the quality of circulating water develop in the direction of high hardness, high alkalinity, high pH value and high temperature, and improves the performance of water treatment agents. requirements. At present, a large number of water treatment agents and corresponding scale inhibitors used under normal temperature conditions have been developed, and have been widely used in actual production. However, with the development of modern industry, the temperature of heat exchange medium water has been greatly increased. However, due to the existence of some defects in conven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/14
Inventor 胡新霞刘文峰王金明高云峰刘晓民刘杰华马福兰孙海园刘娅林马金明
Owner SHANDONG TIANQING TECH DEV
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