Hydrophilic and oleophylic amphoteric dust inhibitor as well as preparation method and application thereof

An inhibitor and hydrophilic technology, which is applied in the fields of composite material science and environmental protection, can solve the problems of fly ash wetting and penetration that cannot be solved at the same time, and achieve the effect of high-speed penetration and effective barrier

Inactive Publication Date: 2019-08-02
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that fly ash wetting and penetration cannot be solved at the same time in the prior art, the present invention provides a hydrophilic and lipophilic amphoteric dust inhibitor and its preparation method. The inhibitor is a kind of dust inhibitor with high wettability Surfactant solution can quickly penetrate into the fly ash whose surface is hydrophilic and lipophilic by capillary action; during the spraying process, the splashed particles are captured on the surface of the powder pile to form a stable Pickering emulsion barrier layer, the barrier layer After drying, a compact hard shell is formed, and at the same time realizes high-speed penetration and effective barrier to the surface hydrophilic and lipophilic intricate powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing 7g polyethylene glycol (molecular weight 400), 2g sodium lauryl sulfate, 1g alkali lignin is dissolved in 990g water, make 1% aqueous solution, 50g solution is sprayed on 100g fly ash (fill into large beaker , the powder thickness is 10cm, the ash content is 50%, and the average particle size is 50μm), observe the penetration depth within 5min, and dry it in a 40℃ electric blast drying oven for 3h, test its water evaporation rate, and observe the surface wetting condition , compared with the blank sample only adding water, the results are shown in Table 1.

[0028] Table 1 Wetting speed and evaporation speed of wetting agent on fly ash surface

[0029] Wetting and Penetration Inhibitors water Evaporation rate (%) 33.2 91.4 Penetration depth (mm) 88.2 5.1 surface wetting Wet all unable to wet

Embodiment 2

[0031] Take by weighing 10g Tween-60, 4g sodium lauryl sulfate, 2g sodium carboxymethylcellulose and dissolve in 3180g water to make a 0.5% aqueous solution, and 50g solution is sprayed on 100g fly ash (into a large beaker, The thickness of the powder is 10cm, the ash content is 30%, and the average particle size is 60μm), observe the penetration depth within 5min, and dry it in an electric blast drying oven at 40°C for 3h, test its water evaporation rate, and observe the surface wetting condition. Compared with the blank sample with only water added, the results are shown in Table 2.

[0032] Table 2 Wetting speed and evaporation speed of wetting agent on fly ash surface

[0033] Wetting and Penetration Inhibitors water Evaporation rate (%) 29.2 92.31 Penetration depth (mm) 77.6 2.7 surface wetting Wet all unable to wet

Embodiment 3

[0035] Take by weighing 6g polyethylene glycol (molecular weight 200), 1.5g sodium dodecylbenzenesulfonate, 1.5g protein cement foaming agent, 1g naphthalenesulfonic acid formaldehyde copolymer sodium salt, be dissolved in 490g water, make 2% Spray 50g of the solution on 100g of fly ash (put into a large beaker, the thickness of the powder is 10cm, the ash content is 70%, and the average particle size is 57μm), observe the penetration depth within 5min, and electric blast at 40℃ Dry it in a drying oven for 3 hours, test its water evaporation rate, observe the surface wetting condition, and compare it with the blank sample with only water added. The results are shown in Table 3.

[0036] Table 3 Wetting speed and evaporation speed of wetting agent on fly ash surface

[0037] Wetting and Penetration Inhibitors water Evaporation rate (%) 22.5 97.7 Penetration depth (mm) 91.1 6.9 surface wetting Wet all slow wetting

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Abstract

The invention discloses a hydrophilic and oleophylic amphoteric dust inhibitor. The dust inhibitor is a compound prepared from an infiltrating component A, a component B forming stable foam with fly ash and a component C for stabilizing and blocking the surface; the component A is one or more of polyethylene glycol, Tween 20 and sodium hexametaphosphate; the component B is one or two of lauryl sodium sulfate, sodium dodecyl benzene sulfonate and a protein cement foaming agent; the component C is one or more of alkali lignin, sodium sulfamate, naphthalenesulfonic acid and formaldehyde copolymersodium salt, sodium carboxymethyl cellulose, sodium hydroxyethyl cellulose and attapulgite clay; the adding quantity of the component A is 60%-80% of total mass, the adding quantity of the componentB is 15%-30% of the total mass, and the adding quantity of the component C is 5%-10% of the total mass; during using, an aqueous solution with mass concentration being 0.5%-2.0% is prepared after thecomponents A, B and C are mixed in proportion; fast infiltration and raise dust suppression on the hydrophilic and oleophylic complex fly ash surface with high carbon content are realized simultaneously.

Description

technical field [0001] The invention belongs to the technical fields of composite material science and environmental protection, and in particular relates to a preparation method and application of a hydrophilic and lipophilic amphoteric dust inhibitor. Background technique [0002] In my country's energy structure, coal accounts for more than 80% of the primary energy. A large number of coal-fired power plants and coal chemical plants produce complex fly ash. When the carbon content is high, the surface of the fly ash is more complex, and there may be hydrophilic and lipophilic particles. Complex interlaced surface, this kind of surface is difficult to be effectively wetted by common wetting processes, such as spraying, water injection, etc., and due to the presence of lipophilic areas on the particle surface, water is also difficult to retain and evaporates and seeps out quickly. [0003] Chinese invention patent 200810171888.X proposes a preparation method of coal dust inh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/22
CPCC09K3/22
Inventor 李晓宏何其慧胡柏星权亚文高伟王溢华王鹏伟张涛杜鹏鹏白罡
Owner NANJING UNIV
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