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Composite antisludging agent of reverse osmosis/nanofiltration system

A composite scale inhibitor, reverse osmosis technology, applied in osmosis/dialysis water/sewage treatment, semi-permeable membrane separation, chemical instruments and methods, etc. , to reduce costs

Active Publication Date: 2014-11-12
辽宁莱特莱德环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the defects that the existing compound antiscalant used in reverse osmosis / nanofiltration system has limited usage conditions and is easy to cause pollution, the present invention provides a compound antiscalant for reverse osmosis / nanofiltration system, which can be used for reverse osmosis and nanofiltration technology, reduce membrane fouling, improve operating efficiency of reverse osmosis and nanofiltration systems, and prolong operating life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A reverse osmosis / nanofiltration system composite scale inhibitor 1 kg, made by the following method:

[0038] Component 1: The cyclodextrin solution has a mass percent concentration of 28% and a total weight percent of 7.5%;

[0039] Component 2: aminotrimethylene phosphonic acid ATMP5%, maleic anhydride-acrylic acid copolymer MA-AA25%, 2-phosphonobutane-1,2,4-tricarboxylic acid PBTCA30%, hydroxyethylidene diphosphonic acid HEDP28 %, the total weight percentage is 88%;

[0040] Component 3: 2,2-dibromo-3-cyanopropionamide DBNPA, 4.5% by weight;

[0041] Mix Components 2 and 3, and combine with Component 1.

[0042] The three components are mixed according to the following weight percentages, component 1: 7.5%, component 2: 88%, component 3: 4.5%.

[0043] The components added to the cyclodextrin solution and their parts by weight are as follows: 17 parts of β-cyclodextrin, 9 parts of γ-cyclodextrin, 13 parts of hydroxypropyl-β-cyclodextrin, sulfobutyl ether- 6 part...

Embodiment 2

[0050] Each component is mixed and compounded according to the following proportions in terms of active ingredients:

[0051] A reverse osmosis / nanofiltration system compound antiscalant 2 kg, characterized in that it is made by the following method: component 1: cyclodextrin solution mass percent concentration is 30%, weight percent content 2%; component 2 : amino trimethylene phosphonic acid ATMP5%, maleic anhydride-acrylic acid copolymer MA-AA25%, 2-phosphonic acid butane-1,2,4-tricarboxylic acid PBTCA60%, total weight percentage 90%; components 3: 2,2-dibromo-3-cyanopropionamide DBNPA, 8% by weight; component 2 and component 3 are mixed, and then combined with component 1.

[0052] Components and parts by weight of the cyclodextrin solution: 15 parts of β-cyclodextrin, 5 parts of γ-cyclodextrin, 10 parts of hydroxypropyl-β-cyclodextrin, sulfobutyl ether-β-cyclodextrin 5 parts of essence, 15 parts of disaccharide-β-cyclodextrin, 3 parts of dimethyl-β-cyclodextrin, 1 part o...

Embodiment 3

[0059] 1 kg of composite antiscalant for reverse osmosis / nanofiltration system, characterized in that it is made by the following method: component 1: α-cyclodextrin solution mass percent concentration 26%, weight percent content 5%; component 2: Aminotrimethylene phosphonic acid ATMP20%, maleic anhydride-acrylic acid copolymer MAAA30%, 2-phosphonobutane-1,2,4-tricarboxylic acid PBTCA5%, hydroxyethylidene diphosphonic acid HEDP35%, total weight 90% content; component 3: 2,2-dibromo-3-cyanopropionamide DBNPA, 5% by weight; component 2 and component 3 are mixed, and then blended with component 1.

[0060] The cyclodextrin solution includes the following components in parts by weight: 20 parts of β-cyclodextrin, 10 parts of γ-cyclodextrin, 20 parts of hydroxypropyl-β-cyclodextrin, sulfobutyl ether-β-cyclodextrin 10 parts of essence, 25 parts of disaccharide-β-cyclodextrin, 6 parts of dimethyl-β-cyclodextrin, 5 parts of hydroxyethyl-β-cyclodextrin.

[0061] Its preparation method...

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PUM

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Abstract

The invention provides a composite antisludging agent of a reverse osmosis / nanofiltration system. The composite antisludging agent comprises the following components in percentage by weight: 2%-10% of cyclodextrin solution, namely a component I, 80%-90% of at least one or a mixture of amino trimethylene phosphonic acid (ATMP), a copolymer of maleic anhydride-acrylic acid (MA-AA), 2-phosphonic acid butane-1, 2,4-tricarboxylic acid (PBTCA), and hydroxyl ethylidene diphosphonic acid (HEDP), namely a component II, and 1%-10% of 2,2-dibromo-2-cyano-acetamid (DBNPA), namely a component III. The composite antisludging agent is prepared by mixing the component II and the component III, and then fusing the obtained mixture with the component I. When being applied to the reverse osmosis / nanofiltration / ultrafiltration system, the composite antisludging agent can be used for effectively relieving the pollution to the reverse osmosis / nanofiltration / ultrafiltration system caused by polcard, calcium sulphate salt, barium sulfate, strontium sulfate, calcium fluoride, colloidal iron and colloidal silica, relieving biological contamination simultaneously, improving the working efficiency of the system, prolonging the cleaning period and the service life of the reverse osmosis / nanofiltration / ultrafiltration system, and reducing the cost of reverse osmosis.

Description

Technical field: [0001] The invention relates to a water treatment agent, in particular to a composite scale inhibitor capable of reducing fouling and pollution of a reverse osmosis membrane / nanofiltration membrane / ultrafiltration membrane system. Background technique: [0002] Reverse osmosis, nanofiltration and ultrafiltration are all typical membrane separation operation units, which have been widely used in the production process of drinking water purification, ultrapure water production in the electronics industry, chemical industry, electric power, textile, metallurgy and other industries , occupies a very important position in the field of water treatment. At present, industrial wastewater pollutes our water sources, and the natural water supply cannot meet the needs of population expansion and industrial growth. Therefore, reverse osmosis, nanofiltration, and ultrafiltration, as advanced wastewater treatment technologies and water resource reuse technologies, have al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/08C02F1/44
Inventor 苏战华
Owner 辽宁莱特莱德环境工程有限公司
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