Dust suppressant and preparation method and dust suppression method thereof

A dust suppressant and sodium humate technology, applied in the field of environmental pollution control, can solve problems such as boiler aging, affecting coal combustion characteristics, and secondary pollution

Inactive Publication Date: 2015-03-25
QIANQIU ENERGY SHANGHAI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, if the polymer material dust suppressant is fully burned in the final combustion of coal, it needs more oxygen than coal combustion. Therefore, in the case of unified combustion with coal, the polymer material cannot be fully burned, which will cause The aging of the boiler will cause secondary pollution, and will also affect the combustion characteristics of the coal itself. At the same time, the cost of the polymer material dust suppressant is relatively high

Method used

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  • Dust suppressant and preparation method and dust suppression method thereof
  • Dust suppressant and preparation method and dust suppression method thereof
  • Dust suppressant and preparation method and dust suppression method thereof

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preparation example Construction

[0024] Therefore, the embodiment of the present invention discloses a kind of preparation method of dust suppressant, comprises the following steps:

[0025] Sodium humate is mixed with water to obtain a mixed solution;

[0026] The mixed solution is mixed with the acid solution to obtain the dust suppressant.

[0027] According to the present invention, the sodium humate can be directly purchased from the market, or can be obtained by reacting humic acid and sodium hydroxide, specifically:

[0028] Mix humic acid and water, stir evenly, heat and add sodium hydroxide, then raise the temperature to 90-100°C and keep it warm for 100-140min to obtain sodium humate.

[0029] The above-mentioned humic acid itself is insoluble in water, so it needs to be sodiumized first to make it into a water-soluble sodium salt, sodium humate. Well known to those skilled in the art, the humic acid is derived from lignite, so the sodium humate can also be obtained by reacting lignite with sodium...

Embodiment 1

[0039] Prepare sodium humate solution with 54t of water and 6.48t of sodium humate;

[0040] Add sulfuric acid with a concentration of 98wt% to the above sodium humate solution until the pH value is neutral to obtain a dust suppressant.

Embodiment 2

[0042] Weigh 540kg of water and 64.8kg of humic acid (this is the dry weight of humic acid, the weight of humic acid is 89.8kg, of which the water content is 27.84wt%), and 8kg of sodium hydroxide;

[0043] Put the above-mentioned humic acid and water into the reaction kettle, stir evenly to obtain a mixed solution, heat the mixed solution and slowly add 8kg of sodium hydroxide;

[0044] When the temperature of the reaction kettle rose to 95°C, it was kept warm for 120 minutes, then the heating was stopped, and then hydrochloric acid with a concentration of 36wt% was slowly added dropwise until the pH value was neutral to obtain a dust suppressant.

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Abstract

The invention provides a dust suppressant and a preparation method thereof. The preparation method of the dust suppressant comprises the following steps of: mixing sodium humate and water to obtain a mixed solution; and mixing the mixed solution with an acid solution to obtain the dust suppressant. The invention also provides a dust suppression method which is used for mixing the prepared dust suppressant with upgraded coal. The colloidal humic acid in the dust suppressant agglomerates fine dust in the upgraded coal, the amount of fine powder in the upgraded coal is reduced, the particle size of the fine powder is increased, and then a dust suppression effect is realized; and meanwhile, since the dust suppressant is in a liquid state, the water content of coal can be increased, and a certain dust suppression effect is realized.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a dust suppressant, a preparation method thereof and a dust suppression method. Background technique [0002] Upgraded coal is a high-quality coal obtained by removing moisture and volatile matter from high-moisture lignite and other processing methods such as drying and dry distillation. In the process of processing lignite and equipment, the extrusion and collision between lignite and lignite will produce fine powder. After removing most of the water, the density of the fine powder will decrease and become floating dust in the air. These floating dust will pollute the environment. It has a great impact on human health, and also hinders the transportation and storage of upgraded coal. Therefore, dust suppressants are needed to prevent the generation of dust from upgraded coal. [0003] At present, most dust suppressants use polymer materials, such as: p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10C10L10/02
Inventor 李柏荣
Owner QIANQIU ENERGY SHANGHAI
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