Polycarboxylate-type efficient dust suppressant as well as preparation method and application thereof

Abstract

The invention relates to a polycarboxylic acid type efficient dust suppressant, which is prepared from the following raw materials: a polycarboxylic acid copolymer, a wetting agent and a preservative. After the dust suppressant product is mixed with dust, the compressive strength is high, the dust suppression durability is high, the dust suppression effect is particularly obvious under the condition that a pavement soil layer is thick, and secondary dusting is effectively prevented.

Description

technical field [0001] The invention relates to the field of building materials and admixtures, in particular to a polycarboxylic acid-based high-efficiency dust suppressant and its preparation method and application. Background technique [0002] In recent years, my country's environmental protection policies have become more stringent, and the management and control of regional air pollution, which is one of the important characteristics of inhalable particulate matter (PM10) and fine particulate matter (PM2.5), has become increasingly prominent. The problem of dust control has become an urgent issue in my country's environmental governance. [0003] Most of the traditional dust suppression methods use watering or covering to suppress dust. Sprinkling water has a good dust suppression effect, but the water evaporates quickly, and continuous watering operations are necessary, resulting in a lot of waste of water resources. For large mines, ash dumps or coal yards, compared...

AI Technical Summary

Problems solved by technology

Sprinkling water has a good dust suppression effect, but the water evaporates quickly, and continuous watering operations are necessary, resulting in a lot of waste of water resources. For large mines, ash dumps or coal yards, compared with the evaporation speed and the absorption speed of muck, it is extremely fast. more frequent watering

Generally, dust-proof nets are used to suppress dust on the surface stockpile. This kind of dust suppression method is feasible in a short-term emergency, but in the case of long-term sun exposure, the dust-proof covering will cause secondary pollution to the environment after aging and fragmentation. Comprehensive higher cost

In a large urban environment, motor vehicle and traffic pollution are one of the contributing factors to air pollution, especially PM2.5 pollution. The traditional dust control method is to regularly sprinkle water on roads, construction sites and other places, but usually, water The surface tension of the fine dust particles is high, and the electrostatic charge carried by the fine dust particles is the same as that carried by the water mist particles, and they repel each other, so the fine dust and hydrophobic dust are not easy to be quickly and effectively wetted by water.

[0004] CN106947432A discloses a road dust suppressant, said road dust suppressant is composed of the following components by weight percentage: 5-10% of sodium dioctyl sulfonate maleate, 88-93% of glycerin, 0.5-2% carboxymethyl cellulose, 0.1-0.3% polyacrylamide, and the remaining components are configuration water, which uses polyacrylamide as the main effective substance, and the compatibility with other substances is only through simple mixing. Higher viscosity, more difficult to mix, less effective

CN106634843A discloses a moisture-retaining multipurpose dust-proof and dust-suppressant agent, which is composed of the following raw materials in parts by mass: 15-20 parts of polyvinyl alcohol, 8-10 parts of sodium silicate, magnesium fluorosilicate 8-10 parts, 10-15 parts of hydroxypropyl methylcellulose, 1.5-2 parts of sodium lauryl sulfate, 0.8-1 part of alcohol ester dodecyl, 0.5-1 part of ammonium persulfate or potassium persulfate, ethyl 0.5-1 part of diol, 2-3 parts of glycerin, 2-3 parts of polyacrylamide, 45-50 parts of deionized water, CN105907372A discloses a magnetic degradation type dust suppressant, which consists of the following components by weight percentage Composition: natural latex: 0.1-0.6%, natural plant fiber: 0-0.2%, glycerol: 0.2-0.85%, surfactant: 0.05-0.2%, magnetic nanoparticles: 0.2-1%, the balance is composed of water Completion, in the preparation method described, a uniform product can be obtained by stirring and heating and mixing various substances, but there is no reaction process between the substances, the actual operation has little added value to the product, and the economic benefit is poor

CN105694815A uses the reaction product of acrylic emulsion as a dust suppression material, which requires higher frequency stirring, and compared with the acrylamide system, the economy and dust suppression effect are somewhat different

[0005] The chemical dust suppressants currently used in the market have achieved certain effects, but most of these traditional dust suppressants are solid powders, which need to be stirred and diluted on site, which reduces the spraying efficiency during use, and the traditional dust suppressant The water retention capacity of the agent is poor and there are problems such as slow crusting, effective permeability and effective dust suppression cycle

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