Nanometer scale inhibitor, and preparation method thereof
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A kind of antiscalant and nanotechnology, which is applied in the field of new nanoscale antiscalant and its preparation, can solve the problems of environmental pollution and high cost of organic antiscalant, achieve good application prospects, improve operating efficiency and high cost
Inactive Publication Date: 2017-03-29
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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[0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a nanoscale antiscalant and its preparation method. The nanoscale antiscalant and its preparation method solve the cost of the organic antiscalant in the prior art. Technical issues that are relatively high and likely to cause environmental pollution
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Embodiment 1
[0018] A preparation method of nano scale inhibitor, adding nano Al in cooling water 2 O 3 Granules to a concentration range of 0.0005g / L~1g / L, and then add a dispersant, the dispersant is sodium dodecylbenzene sulfonate (SDBS) or sodium dodecyl sulfate (SDS), The mass percentage concentration of the dispersant in the aqueous solution ranges from 0 to 2%, and then stirs for 1 to 3 hours and ultrasonically disperses for 20 to 3000 minutes to obtain nano Al with a particle size range of 10 to 800 nm. 2 O 3 Aqueous solution of particles.
[0019] Add nano Al in the cooling water 2 O 3 Scale inhibitor, when the concentration of scale-forming ions in the cooling water is large and scaling phenomenon occurs, nano-Al 2 O 3 Particles can affect the formation process of scale-forming substances and cause lattice distortion of inorganic scales such as calcium carbonate (see attached figure 1 And figure 2 ), and reduce the adhesion work between the inorganic scale crystals and the metal, so ...
Embodiment 2
[0021] Nano Al used in the embodiment of the present invention 2 O 3 The average particle size is 20 nm. The base fluid is deionized water. The performance evaluation of the scale inhibitor adopts the coupon method, that is, in the test solution, the water temperature of the scale-forming solution is increased to 50℃, and the scale inhibition rate is calculated according to the amount of scale on the surface of the coupon.
[0022] The scale inhibition rate of the scale inhibitor is calculated according to the following formula:
[0023] ×100%
[0024] among them: Is the scale inhibition rate;
[0025] Δ For the weight gain of the coupon when no scale inhibitor is added, mg;
[0026] Δ In order to add a certain scale inhibitor, the weight of the coupon, mg.
[0027] When containing 0, 10, 40, 100, 200, 1000 mg / L scale inhibitor (nano Al 2 O 3 In the base fluid of particles), the weight gains of the stainless steel coupons after the fouling experiment were 41.0, 20.9, 36.1, 14.7, 6...
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Abstract
The invention discloses a nanometer scale inhibitor. The nanometer scale inhibitor is an aqueous solution of nanometer Al2O3 particles with a particle size ranging from 10 to 800nm. In the nanometer scale inhibitor, the concentration of nanometer Al2O3 ranges from 0.0005 to 5g/L; the nanometer scale inhibitor also comprises a dispersant; the mass concentration of the dispersant in the aqueous solution of the nanometer scale inhibitor ranges from 0 to 2%. The invention also discloses a preparation method of the nanometer scale inhibitor. According to the preparation method, the nanometer Al2O3 particles and the dispersant are added into deionized water; magnetic stirring and ultrasonic oscillation are adopted so as to disperse the nanometer Al2O3 particles in water uniformly and obtain the nanometer Al2O3 scale inhibitor. In applications, the nanometer Al2O3 scale inhibitor is added into cooling water, when the concentration of scale-forming ions in the cooling water is too high, and scale formation is induced, the nanometer Al2O3 particles are capable of influencing scale formation process, inducing lattice distortion of inorganic scale such as calcium carbonate, and reducing adhesive force of inorganic scale crystals with metal, so that adhesion of the scale-forming substances in cooling water onto the metal surfaces of heat exchange equipment is not easily caused.
Description
Technical field [0001] The invention belongs to the field of industrial water treatment, and relates to a novel nanoscale inhibitor applied to an industrial cooling water system and a preparation method thereof. Background technique [0002] The surface of the cooling pipe of the industrial circulating cooling water system often fouls during operation, especially when the concentration of fouling ions in the cooling water is high, the fouling phenomenon is particularly prominent. At present, the method of adding a scale inhibitor is usually used to control. Commonly used scale inhibitors include organic substances such as polymeric phosphates, organic phosphonates, and organic low molecular weight polymers. The use of these agents has played a huge role in the safe and economic operation of the circulating cooling water system. However, the use cost of this chemical scale inhibitor is relatively high, and it pollutes the environment. Nanoscale inhibitors are mainly prepared by s...
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