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Reverse osmosis scale inhibition bactericide forseawater desalination

A bactericide and reverse osmosis technology, which is applied in the field of water treatment chemicals, can solve problems such as fouling, affecting the service life and life of reverse osmosis membranes, and achieve the effects of simple use, prolonging the cleaning cycle and operating life, and reducing operating costs

Active Publication Date: 2021-06-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the use of the reverse osmosis system, scales such as calcium carbonate, calcium sulfate, barium sulfate, and silicate will adhere to the membrane surface and be fouled by bacteria and their metabolites, which will seriously affect the service life and life of the reverse osmosis membrane.

Method used

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  • Reverse osmosis scale inhibition bactericide forseawater desalination
  • Reverse osmosis scale inhibition bactericide forseawater desalination
  • Reverse osmosis scale inhibition bactericide forseawater desalination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Wherein the mass percent ratio of each component is: dendrimer G4A 5.0%, hydroxamic acid 10.0%, dithiourea 3.0%, AA-AMPS-EGMAE-HPA (relative molecular mass about 1500) 15.0%, glutaraldehyde 15.0%, deionized water 52.0%.

[0027] The synthetic method of AA-AMPS-EGMAE-HPA described in this embodiment is as follows:

[0028] In a four-neck flask equipped with a magnetic stirring device, add 50 parts by mass of water and 3 parts by mass of molecular weight regulator isopropanol, then insert a thermometer, a reflux condenser and two dropping funnels, one for dropping The initiator ammonium persulfate solution of 5 mass parts, another is used to drip 42 mass parts by acrylic acid (AA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), and ethylene glycol monoene A monomer mixture composed of propyl ether (EGMAE) and hydroxypropyl acrylate (HPA) in a mass ratio of 6:2:4:2. At different temperatures of 65-90°C, start to add the initiator and monomer mixture dropwise, and the ...

Embodiment 2

[0032] Wherein the mass percent ratio of each component is: dendrimer G3A 8.0%, hydroxamic acid 5.0%, dithiourea 2.0%, AA-AMPS-EGMAE-HPA (relative molecular mass about 1000) 10.0%, pentadiene Aldehyde 20.0%, deionized water 55.0%.

[0033] The synthetic method of AA-AMPS-EGMAE-HPA described in this embodiment is as follows:

[0034] In a four-necked flask equipped with a magnetic stirring device, add 40 parts by mass of water and 5 parts by mass of molecular weight modifier isopropanol, then insert a thermometer, a reflux condenser and two dropping funnels, one for dropping The initiator ammonium persulfate solution of 10 mass parts, another one is used for dripping 45 mass parts by acrylic acid (AA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), and ethylene glycol monoene A monomer mixture composed of propyl ether (EGMAE) and hydroxypropyl acrylate (HPA) in a mass ratio of 5:2:5:2. At different temperatures of 65-85°C, start to add the initiator and monomer mixture dro...

Embodiment 3

[0038]Wherein the mass percent ratio of each component is: dendrimer G5A 2.0%, hydroxamic acid 8.0%, dithiourea 6.0%, AA-AMPS-EGMAE-HPA (relative molecular mass about 2200) 25.0%, pentadiene Aldehyde 10.0%, deionized water 49.0%.

[0039] The synthetic method of AA-AMPS-EGMAE-HPA described in this embodiment is as follows:

[0040] In a four-necked flask equipped with a magnetic stirring device, add 45 parts by mass of water and 4 parts by mass of molecular weight regulator isopropanol, then insert a thermometer, a reflux condenser and two dropping funnels, one for dropping The initiator ammonium persulfate solution of 4 mass parts, another is used to drip 47 mass parts by acrylic acid (AA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), and ethylene glycol monoene A monomer mixture composed of propyl ether (EGMAE) and hydroxypropyl acrylate (HPA) in a mass ratio of 5:3:4:2. At different temperatures of 65-90°C, start to add the initiator and monomer mixture dropwise, and...

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Abstract

The invention relates to a reverse osmosis scale inhibition bactericide for seawater desalination, which is characterized in that the reverse osmosis scale inhibition bactericide for seawater desalination is prepared from the following raw material components in percentage by mass: 1%-20% of dendritic macromolecules, 1%-10% of hydroximic acid, 1%-10% of dithiourea, 5%-40% of AA-AMPS-EGMAE-HPA, 5%-30% of glutaraldehyde and 30%-70% of deionized water. According to the invention, the synergistic effect of several agents is fully utilized, so that the pollution or damage of calcium carbonate scale, calcium sulfate scale, barium sulfate scale, silicate scale and the like to the reverse osmosis membrane can be effectively reduced; and microorganisms in water are effectively killed, and pollution and blockage of the reverse osmosis membrane caused by breeding of the microorganisms are avoided. The reverse osmosis scale inhibition bactericide is especially suitable for a reverse osmosis system in the field of seawater desalination, and can effectively prolong the cleaning period and operation life of the reverse osmosis system for seawater desalination.

Description

technical field [0001] The invention belongs to the field of water treatment chemicals, and relates to a seawater desalination reverse osmosis antiscale bactericide, in particular to an environment-friendly and highly efficient antiscale bactericide for seawater desalination reverse osmosis systems. [0002] technical background [0003] China is short of fresh water resources, and China's per capita fresh water resources are only a quarter of the world's average level. With the gradual improvement of people's living standards, the demand for fresh water resources is increasing, and conventional fresh water resources can no longer meet the needs of people's life and production. In recent years, my country has gradually begun to expand the number and scale of seawater desalination projects to meet people's demand for freshwater resources. At present, the commonly used seawater methods include thermal seawater desalination and membrane seawater desalination. Among them, the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12B01D65/02B01D65/08A01N47/34A01N37/28A01N35/02A01P1/00C02F103/08
CPCC02F5/10C02F5/12B01D65/022B01D65/08A01N47/34A01N37/28A01N35/02C02F2103/08C02F2303/04Y02A20/131
Inventor 杨文忠尹晓爽陈云刘瑛
Owner NANJING UNIV OF TECH