Scaling inhibitor applied to industry cooling water systems, and preparation method thereof

A technology of cooling water system and scale inhibitor, which is applied in the field of new scale inhibitor and its preparation, can solve environmental pollution and other problems, and achieve the effects of improving thermal conductivity, improving operating efficiency, and improving heat exchange effect

Inactive Publication Date: 2017-02-15
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a novel scale inhibitor applied to industrial cooling water systems and a preparation method thereof. The described novel scale inhibitor applied to industrial cooling water systems and its The preparation method should solve the technical problem that the organic scale inhibitors in the prior art are likely to cause environmental pollution

Method used

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  • Scaling inhibitor applied to industry cooling water systems, and preparation method thereof

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Effect test

Embodiment 1

[0024] First prepare graphene oxide: add 10.0g graphite, 10.0g potassium persulfate, and 10.0 phosphorus pentoxide to a three-necked round-bottomed flask, slowly pour 100ml of concentrated sulfuric acid and stir, and after stirring evenly, slowly raise the temperature to 80°C React for 5 hours, pour the reacted liquid into the ice-water mixture until the solution is completely exothermic, filter, wash with deionized water, put it in a vacuum oven at 80°C for 12 hours, and the product is pre-oxidized graphite . Pre-oxidized graphite was further treated with 300ml of concentrated sulfuric acid, 60.0g of potassium permanganate and 50ml of hydrogen peroxide, and the precipitate was collected, washed with (10%, v / v) dilute hydrochloric acid for 10 times to obtain graphite oxide, and the graphite oxide was ultrasonically treated for 10~ After 180 minutes, graphene oxide with a particle size of 15-800nm ​​was obtained.

Embodiment 2

[0026] In simulated water containing 0, 10, 50, 100, and 200 mg / L antiscalant (graphene oxide), the weight gain of stainless steel coupons after the scaling test was 32.0, 11.5, 3.1, 4.2, and 6.8 mg, respectively , so the scale inhibition rates of graphene oxide scale inhibitors with concentrations of 10, 50, 100, and 200 mg / L can be calculated to be 64.1%, 90.3%, 86.9%, and 78.8%.

[0027] Through the above examples, the results show that using graphene oxide as the scale inhibitor, the scale inhibition rate first increases and then decreases with the increase of the concentration, and the scale inhibition rate reaches 90.3% when the graphene oxide concentration is 50 mg / L .

[0028] To sum up, the present invention is a novel scale inhibitor that can be used in industrial cooling water systems, that is, adding a certain concentration of graphene oxide in the cooling water can inhibit the adhesion of scaling particles on the metal surface.

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Abstract

The invention provides a scaling inhibitor applied to industry cooling water systems. The scaling inhibitor is an aqueous solution of flake-like graphene oxide, the concentration of the scaling inhibitor ranges from 0.001 to 10g/L, and particle size ranges from 15 to 800nm. The invention also provides a preparation method of the scaling inhibitor; according to the preparation method, flake-like graphene oxide scaling inhibitor is added in cooling water, and the flake-like graphene oxide aqueous solution is obtained via magnetic stirring and ultrasonic dispersion. According to applications, the flake-like graphene oxide scaling inhibitor is added into industrial recycling cooling water, when the concentration of scale-forming ions in cooling water is relatively large, and scaling is caused, the surfaces of scale-forming particles (such as calcium carbonate) are coated by graphene oxide, the crystal type of scale-forming substances, such as calcium carbonate, is changed, and flocculent mild scale is formed, so that adhesion of the scale-forming substances, such as calcium carbonate, in water onto the metal surfaces of heat exchange equipment is not easily caused, the flocculent mild scale is removed via drainaging of the cooling water systems, and scaling inhibition is achieved.

Description

technical field [0001] The invention belongs to the field of industrial water treatment, and relates to a novel scale inhibitor applied to an industrial cooling water system and a preparation method thereof. Background technique [0002] Scaling, corrosion and other problems often occur in the industrial circulating cooling water system during operation, especially after the concentration ratio is increased, these problems are particularly prominent with the increase of the concentration of scaling ions. At present, the method of adding water treatment chemicals is usually used to control. Scale inhibitors are an important part of water treatment chemicals in circulating cooling water systems. Currently, commonly used scale inhibitors are organic substances such as polymeric phosphates, organic phosphonates, and organic low-molecular-weight polymers. The use of these substances has great impact on circulating cooling water systems. The safety and economic operation of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08
CPCC02F5/08
Inventor 葛红花周宏旺吴凯王峰杜淼李双圻
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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