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Phosphorus-free reverse osmosis membrane antisludging agent and preparation method thereof

A technology of reverse osmosis membrane and scale inhibitor, which is applied in the field of phosphorus-free reverse osmosis membrane scale inhibitor and its preparation, can solve the problems of low critical saturation index, poor dispersing scale inhibitor effect, easy decomposition of the agent, etc., and achieves long storage period. , It is not easy to decompose, and the effect of eliminating bacteria exceeding the standard

Active Publication Date: 2009-10-14
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional scale-inhibiting dispersion method—sodium hexametaphosphate plus acid has many defects: easy decomposition of chemicals, low critical saturation index (LSI<0.50), poor dispersion and scale-inhibiting effect, etc.
[0005] At present, there is no relevant patent in China for phosphorus-free reverse osmosis membrane scale inhibitor and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Select raw materials by weight percentage

[0020] AL-one 50%,

[0021] Carboxylate-sulfonate-nonionic terpolymer 20%,

[0022] Sodium Hydroxide 0.5%,

[0023] The rest is deionized water.

[0024] Add deionized water, sodium hydroxide, AL-one and AA / AHPS sulfonate copolymer into the container in proportion, and stir at room temperature for 1-1.5 hours to obtain the product.

Embodiment 2

[0026] Select raw materials by weight percentage

[0027] AL-one 90%,

[0028] AA / AHPS Sulfonate Copolymer 5%,

[0029] Sodium Hydroxide 1.5%,

[0030] The rest is deionized water.

[0031] Add deionized water, sodium hydroxide, AL-one and carboxylate-sulfonate-nonionic terpolymer into the container sequentially in proportion, and stir at room temperature for 1-1.5 hours to obtain the product.

Embodiment 3

[0033] Select raw materials by weight percentage

[0034] AL-one 70%,

[0035] AA / AHPS Sulfonate Copolymer 12%,

[0036] Potassium Hydroxide 1%,

[0037] The rest is deionized water.

[0038] Add deionized water, potassium hydroxide, AL-one and AA / AHPS sulfonate copolymer into the container sequentially in proportion, and stir at room temperature for 1-1.5 hours to obtain the product.

[0039] Application Test and Results

[0040] 1. Source of test samples

[0041] see table 1

[0042] Table 1 Source of test samples

[0043] Pharmacy source

Drug name

Product embodiment 1 of the present invention

ME 700①

Product embodiment 2 of the present invention

ME 700②

Product embodiment 3 of the present invention

ME 700③

[0044] 2. Resistance to calcium carbonate test

[0045] 2.1 Test water: water distribution: Ca 2+ 240ppm, HCO 3 - 732ppm.

[0046] 2.2 Test conditions: water temperature: 80±1°C, time: 10h, dosage of medic...

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Abstract

The invention relates to a phosphorus-free reverse osmosis membrane antisludging agent and a preparation method thereof, relating to water treatment. The phosphorus-free reverse osmosis membrane antisludging agent comprises the following components by weight percent: 50-90 percent of AL-one, 5-20 percent of sulphonate copolymer, 0.5-1.5 percent of pH regulator and the balance of de-ionized water. The preparation method comprises the steps of sequentially adding the de-ionized water, the pH regulator, the AL-one and the sulphonate copolymer into a container according to the weight percent, stirring for 1-1.5 h under room temperature and obtaining the product. The phosphorus-free reverse osmosis membrane antisludging agent can be used in a wider pH range of water supply, has favorable stability for calcium ion concentration, alkalinity and metal ions of iron, manganese, and the like, can effectively control dirties such as CaCO3, CaSO4, BaSO4, SrSO4, CaF2, SiO2, and the like, has no causticity compared with acid and safe operation, can be compatible with general flocculating agent, is not easy to decompose, can be stored for a long time and can eliminate biological pollution and bacteria exceeding standard of the membrane system and avoids pollution of calcium phosphate precipitation and pollution for environmental water source. The invention is suitable for the water treatment of a reverse osmosis system.

Description

technical field [0001] The invention relates to water treatment, in particular to a phosphorus-free reverse osmosis membrane scale inhibitor and a preparation method thereof. Background technique [0002] Reverse osmosis (RO) desalination technology is widely used in various fields such as pure water preparation, power plant boiler feed water treatment, industrial wastewater treatment and drinking water treatment. Compared with the traditional desalination technology, reverse osmosis desalination technology has outstanding advantages such as simple system, convenient operation, small system footprint, low energy consumption, stable product water quality, no regeneration waste liquid discharge, and economical operating costs. Therefore, the application of reverse osmosis The field has been continuously expanded. In addition, with the development of membrane separation technology, the improvement of pretreatment technology, the development of energy recovery system and the wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08C02F5/10
Inventor 王丕新李洪社喻果
Owner WEIHAI XIANGYU TECH
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