Antisludging agent and application of the same in water treatment

A technology of scale inhibitor and content, applied in the field of water treatment agents, can solve the problem of unsatisfactory scale inhibitor products, etc., achieve good scale inhibition effect, prolong membrane cleaning cycle, and good scale inhibition effect.

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The antiscalants provided by the prior art have achieved different effects in different applications, but for high calcium, high sulfate, and high soluble silicon water quality, there is currently no satisfactory antiscalant product

Method used

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  • Antisludging agent and application of the same in water treatment
  • Antisludging agent and application of the same in water treatment
  • Antisludging agent and application of the same in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Formulate scale inhibitor

[0026] First, add 1.1 g of polyepoxysuccinic acid to 3.2 g of 2-phosphonobutane-1,2,4-tricarboxylic acid, stir and mix well and place for later use; then add 82.3 g of polyamino polyamide to a reactor. Ether-based methylene phosphonic acid, to which 13.4g of polyacrylic acid is added, after stirring, add the mixed 2-phosphonobutane-1,2,4-tricarboxylic acid and polyepoxysuccinic acid into the reactor , Stir in the reactor for a certain period of time to obtain 100g of scale inhibitor.

[0027] Scale inhibitor performance measurement

[0028] 1. Determination of calcium carbonate scale inhibition performance

[0029] The measured water is a certain groundwater, and its water quality is shown in Table 1.

[0030] Table 1

[0031] Serial number

Project

measured value

1

pH

7.88

2

Conductance μs / cm

923

3

Ca 2+ mg / L

262.40

4

Total hard mg / L

392.08

...

Embodiment 2～4

[0043] The measurement method and water quality measurement conditions of the scale inhibition performance are the same as those in Example 1. Table 2 shows the composition, content and scale inhibition performance measurement results of the scale inhibitors in each example.

[0044] Table 2

[0045]

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Abstract

The invention provides antisludging agent and the application method thereof. The antisluding agent comprises polyether polyamino methylene phosphonates, polyepoxysuccinic acid, Aroset and organic phosphonic acid. The antisludging agent is applicable in the water quality with dense calcium, dense sulfate radical and soluble silica, and has great antisludging and dispersing effect. The antisludgingagent which is led into the high-density reverse osmosis water treatment system is added to effectively restrict polcard, sulfate, silicate and other inorganic salts from being deposited and foulingon the film surface, thereby prolonging the cleaning period of the reverse osmosis film.

Description

Technical field [0001] The invention relates to a water treatment agent, in particular to a scale inhibitor suitable for high hardness and high salt water quality and a method for using the scale inhibitor in water treatment processes such as reverse osmosis. Background technique [0002] Reverse osmosis technology is an energy-saving and efficient water treatment technology widely used for desalination of seawater and brackish water. This technology pressurizes the water body so that water molecules pass through the membrane element to form water, and the hydrated ions or macromolecules of the dissolved salt are blocked by the membrane element to form concentrated water. On the side of the concentrated water, because the dissolved substances are concentrated, the insoluble substances will precipitate out, which will deposit on the surface of the membrane element and cause membrane fouling and affect the operation of the reverse osmosis device. Adding a certain amount of scale in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12C02F5/14
Inventor 周霖曹栩然平春霞王峰邢琳聂晋峰
Owner CHINA PETROLEUM & CHEM CORP
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