Circulating cooling water scale inhibitor and preparation method and application thereof

A technology of circulating cooling water and scale inhibitor, which is applied in chemical instruments and methods, natural water treatment, scale removal and water softening, etc., can solve the problems of difficult silica fouling water treatment system, complicated method and high production cost , to achieve the effect of excellent resistance to colloidal silica scale and silicate scale, less dosage and convenient use

Inactive Publication Date: 2018-05-08
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN101973643A discloses the use of a composite scale inhibitor of dendrimers and polyepoxysuccinic acid to prevent the deposition of silica in water. The above methods for preparing scale inhibitors are more complicated and the production cost is higher
Although more types of silica scale inhibitors have been developed, silica scaling is still a problem in water treatment systems

Method used

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  • Circulating cooling water scale inhibitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A scale inhibitor used in circulating cooling water system, which is copolymerized with acrylic acid, sodium methacrylic sulfonate and ethyl acrylate.

[0017] The above-mentioned scale inhibitor adopts the following preparation method: add acrylic acid, sodium methacryl sulfonate, and ethyl acrylate, and the mass percentage of each monomer component is: acrylic acid: sodium methacryl sulfonate: ethyl acrylate: =60: 25:15. Add sodium persulfate and stir evenly, adjust the pH of the solution to 3~4, keep warm at 60°C for 65min, and negative pressure at -0.09Mpa for 45min to obtain the scale inhibitor.

[0018] The prepared antiscalant was tested for static silicon scale inhibition, and the experimental results are shown in the table below.

Embodiment 2

[0020] A scale inhibitor for circulating cooling water systems, composed of acrylic acid, sodium methacrylate, and ethyl acrylate.

[0021] The above antiscalant adopts the following preparation method: add acrylic acid, sodium methacryl sulfonate, and ethyl acrylate, and the mass percentage of each monomer component is: acrylic acid: sodium methacryl sulfonate: ethyl acrylate: =80: 15:5. Add sodium persulfate and stir evenly, adjust the pH of the solution to 3~4, keep warm at 70°C for 55min, and negative pressure at -0.09Mpa for 50min to obtain the scale inhibitor.

[0022] The prepared antiscalant was tested for static silicon scale inhibition, and the experimental results are shown in the table below.

Embodiment 3

[0024] A scale inhibitor for circulating cooling water systems, composed of acrylic acid, sodium methacrylate, and ethyl acrylate.

[0025] The above antiscalant adopts the following preparation method: add acrylic acid, sodium methacrylic sulfonate, and ethyl acrylate, and the mass percentage of each monomer component is: acrylic acid: sodium methacrylic sulfonate: ethyl acrylate=70:20 :10. Add the initiator and stir evenly, adjust the pH of the solution to 3~4, keep warm at 65°C for 60min, and negative pressure at -0.09Mpa for 45min to obtain the scale inhibitor.

[0026] The prepared antiscalant was tested for static silicon scale inhibition, and the experimental results are shown in the table below.

[0027] Effect test

[0028] Test water: NaSiO 3 .9H 2 O 500mg / l.

[0029] Test conditions: water temperature 40±1℃, time 24h, pH=7±0.1, scale inhibitor dosage 70mg / l.

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Abstract

The invention discloses a silica scale inhibitor applied to a circulating cooling water system, and the scale inhibitor is formed by copolymerizing crylic acid, sodium methallyl sulfonate and ethyl acrylate. The scale inhibitor belongs to a non-phosphorus environment-friendly formula, the discharged wastewater does not cause eutrophic pollution of the environment by using the scale inhibitor, andthe scale inhibitor has an excellent performance of inhibiting the colloidal silica scale and the silicate scale, and is suitable for treating the circulating cooling water.

Description

technical field [0001] The invention belongs to the field of industrial water treatment, and in particular relates to a scale inhibitor for circulating cooling water, a preparation method and application thereof. Background technique [0002] In industrial water treatment systems, when the water is concentrated and the amount of silica exceeds its solubility, it will cause the deposition of amorphous silica and form silica scale. The accumulation of silica scale will affect the normal operation of water treatment equipment such as boilers, heat exchangers, and reverse osmosis devices, reducing heat exchange efficiency and reducing the flow through heat exchangers and membranes. Once the silica scale is formed, it is difficult to remove. When using water with high silica content, the operation of the cooling system and reverse osmosis system must be operated at a lower concentration ratio to ensure that the silica does not scale, so that the reverse osmosis Just must limit i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F103/02
CPCC02F5/10C02F2103/023C02F2303/08C02F2303/22
Inventor 高灿柱邱同同李鹏飞程终发申义驰
Owner SHANDONG UNIV
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