A scale inhibitor for reverse osmosis membrane

A technology of reverse osmosis membrane and antiscalant, which is applied in the field of antiscalant for reverse osmosis membrane, can solve problems such as the development of degraded membrane technology and membrane pollution, and achieve the effects of reducing operating costs, reducing cleaning frequency and prolonging service life

Inactive Publication Date: 2006-11-22
TIANJIN CHEM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, membrane modules, equipment and integration technologies have also been rapidly developed and continuously improved. However, membrane fouling and degradation are one of the bottlenecks that always restrict the development of membrane technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Conductivity

[0016] It can be seen that the scale inhibitor for reverse osmosis membrane of the present invention has good scale inhibition and dispersing effect on various salts in water that are easy to scale on reverse osmosis, and is an ideal agent for protecting reverse osmosis membranes and devices.

Embodiment 2

[0018] The formula is 12% of hydroxyethylidene diphosphonic acid, 0.8% of lignin, 4% of polymaleic anhydride, 8% of polyamino polyether methylene phosphonate, and 75.2% of water. The membrane scale inhibitor is used in a certain company's site .

[0019] A set of 50T / h primary reverse osmosis equipment in the company did not add antiscalant at the initial stage of operation. After one month of operation, the system was seriously polluted, the pressure difference increased, the desalination rate decreased, the water production decreased significantly, and the equipment was no longer normal. run. After adding the membrane scale inhibitor of the present invention and cleaning it, the equipment runs well, and the water output and various indicators of the water output can meet the production requirements.

Embodiment 3

[0021] The formula is 10% of hydroxyethylidene diphosphonic acid, 1% of lignin, 5% of polymaleic anhydride, 8% of polyamino polyether group methylene phosphonate, and 76% of water. On the reverse osmosis equipment with a water volume of 100T / h, it has been added since the initial stage of investment, and the equipment has maintained a good processing capacity after half a year of operation.

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PUM

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Abstract

The invention relates to a water treating technology using reverse osmosis membrane, which is a antisludging agent for reverse osmosis membrane. It is characterized in that it comprises following components with their percentage by weight: organo-phosphines acid compound 5-20%, lignin 0.5-1%, polymaleic anhydride0.5-3%, phosphinic carboxyl acid 5-20% and water with left percentage.

Description

technical field [0001] The invention relates to reverse osmosis membrane water treatment technology, which is a scale inhibitor for reverse osmosis membrane. technical background [0002] Reverse osmosis technology is a membrane separation technology that uses pressure difference as power. It can remove all impurities in water - various ions, molecules, organic matter, colloids, bacteria, viruses, heat sources, etc. New technology for polluted water treatment. In recent years, membrane technology has been increasingly widely used in desalination, ultrapure water preparation, sewage treatment and various separation and purification processes in the electronics, chemical, pharmaceutical, food and other industries. [0003] At present, the development of reverse osmosis membrane is increasing rapidly, and its application is becoming more and more extensive. Reverse osmosis systems are used in all walks of life and even in people's daily life. In the future, domestic water wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08C02F5/14
Inventor 陈爱民姚立忱聂明刘赞徐海波王雪王艺林
Owner TIANJIN CHEM RES & DESIGN INST
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