Composite dust suppressant, and preparation method and use method thereof

A dust suppressant and composite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of limitations, only applicable to static mineral bulk materials, etc., and achieve good wind erosion and water erosion effects, good dust suppression effects, The effect of good performance

Inactive Publication Date: 2012-10-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method works well, but only works with stationary bulk minerals, so that limits its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 2.22kg of calcium chloride into the reactor and dissolve in 89kg of water, slowly add 1.22kg of sodium silicate, and stir while adding sodium silicate for 30 minutes. Then add 0.9 kg of polyvinyl alcohol solution, 6 L of glycerol, and 0.4 kg of surfactant sodium dodecylbenzenesulfonate, and in a stirring state, after 30 minutes, the dust suppressant product is obtained.

[0021] Through the test, the viscosity is 84.5mpa·s; the surface tension is 38.4mN / m; the water retention rate reaches 13.68%. Spraying experiments have proved that this dust suppressant can withstand the test of simulated natural rain, high temperature freeze-thaw environment, and can resist the erosion of nature's 8-level wind force, with a compressive strength of 2.89Mpa.

Embodiment 2

[0023] The operation steps are the same as in Example 1, and the dosage of each component is 2.22 kg of calcium chloride, 1.22 kg of sodium silicate, 0.6 kg of polyvinyl alcohol, 8 L of glycerol, 0.3 kg of sodium dodecylbenzenesulfonate, and 87 kg of water.

[0024] Through the test, the viscosity is 60.2mpa·s; the surface tension is 32.3mN / m; the water retention rate reaches 11.79%. Spraying experiments have proved that this dust suppressant can withstand the test of simulated natural rain, high temperature freeze-thaw environment, and can resist the erosion of natural wind force of level 8, and its compressive strength has reached 0.80Mpa.

Embodiment 3

[0026] The operation steps are the same as in Example 1, and the dosage of each component is 2.22 kg of calcium chloride, 1.22 kg of sodium silicate, 1.2 kg of polyvinyl alcohol, 4 L of glycerol, 0.5 kg of sodium dodecylbenzenesulfonate, and 91 kg of water.

[0027] Through the test, the viscosity is 81.4mpa·s; the surface tension is 36.7mN / m; the water retention rate reaches 10.86%. Spraying experiments have proved that this dust suppressant can withstand the test of simulated natural rain, high temperature freeze-thaw environment, and can resist the erosion of natural wind force of level 8, and its compressive strength has reached 0.60Mpa.

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Abstract

The invention relates to a composite pulverized coal dust suppressant, and a preparation method and use thereof. The composite pulverized coal dust suppressant comprises calcium chloride and sodium silicate with the ratio of two to one, 0.6 to 1.2% of polyvinyl alcohol, 4 to 6% of glycerol, 0.3 to 0.5% of surface active agent and water in balancing amount. The composite pulverized coal dust suppressant has the advantages as follows: all the chosen materials are common materials, which are nontoxic and harmless and can be naturally degraded, so that no secondary pollution can be caused; the preparation process is simple; after the composite pulverized coal dust suppressant is sprayed on the surface of bulk mineral material, a curing layer can be formed on the surface of bulk mineral material; the curing layer can bond grains on the surface of the bulk mineral material together so as to prevent wind and fix dust; therefore, the composite pulverized coal dust suppressant has certain economical and environmental benefits.

Description

technical field [0001] The invention relates to an environment-friendly composite dust suppressant and its preparation method and application. The dust suppressant is mainly used to prevent dust generated during the stacking of coal, fly ash and other mineral bulk materials. Background technique [0002] At present, most of the domestic coal storage is stored in the open air, and the raw materials cover a large area. Due to the dry and windy weather in autumn and winter, especially in the northern regions, the dust of the materials in the storage yard is flying, which not only causes the concentration of inhalable particulate matter in the atmosphere to rise sharply, It seriously pollutes the environment, and will cause a lot of waste of coal resources. What is more serious is that some coal storage yards of some thermal power plants may cause fires and explosions due to dust deposition in some pipes, cables and other parts. During the combustion of coal, not only a large am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/22
Inventor 齐立强王特
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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