Dust fall liquid integrating active trapping, moistening and coagulation, dust fall system and dust fall method

Abstract

The invention discloses a dust fall liquid integrating active trapping, moistening and coagulation, which is used for underground dust fall of a coal mine. The dust fall liquid is a composite solutionformed by dissolving alum, sulfite and potassium permanganate in water, wherein the mass concentration of the alum is 0.02-0.2%, the mass concentration of the sulfite is 0.01-1%, and the mass concentration of the potassium permanganate is 0.01-1%. The invention further discloses a dust fall system and a dust fall method using the dust fall liquid integrating active trapping, moistening and coagulation. According to the invention, positive electricity can be generated in the dust fall liquid, the electropositivity of aluminum hydroxide colloid is increased, the ability of liquid drops and thealuminum hydroxide colloid to trap and adsorb coal dust particles is further enhanced, the coagulation phenomenon is enhanced through in-situ improvement of the wettability of coal dust, and the effect of gravity settling is further improved, thereby realizing efficient and rapid dust removal.

Description

technical field [0001] The invention relates to the field of coal mine operation technology, in particular to coal dust prevention and control technology in coal mines. Background technique [0002] The dust problem in the coal mine mining face is becoming more and more serious, especially with the increasing mechanization and automation level of mines, the intensity of coal seam gas extraction is also increasing, so that the coal body will lose water and become drier The amount of floating coal produced by the dust source is larger, and the dust produced by the mining face accounts for more than 85% of all mine dust; [0003] Without any dust control measures in the fully mechanized mining face, the dust concentration is as high as 1500mg / m 3 -2500mg / m 3 , which is more than 5,000 times that when the air pollution on the ground is serious. Even if relevant measures are taken, it is difficult to change the bad condition of the mine environment. [0004] Coal mine dust can...

AI Technical Summary

Problems solved by technology

[0004] Coal mine dust can cause coal dust explosion and pneumoconiosis. In order to control the floating coal that seriously exceeds the standard, dust condensation and wet dust suppression, chemical dust suppression agents are often used for dust suppression. The dust suppression mechanism relies on the flow, collision, and wetting of dust particles. However, to achieve coal dust settlement, it is all passive and random capture of coal dust, ignoring that the contact time between dust particles and water droplets is an important factor affecting the effect of wetting coal dust, which can only affect the migration and escape of dust to a certain extent. Dispersion and humidity, there are problems such as poor dust suppression effect

[0005] As the coal industry has higher and higher requirements for the dust reduction ability of chemical dust suppressants, there are more dust suppressants and technologies combined with wet dust removal in the existing technology, but they all start from reducing the surface tension of water. , improve the affinity of water to coal dust, and increase the probability of dust being wetted, while ignoring the inherent physical and chemical properties of coal dust surface wettability, resulting in little effect

Images