Mine dedusting system and method

Abstract

The invention provides a mine dedusting system and method which are suitable for a coalmine underground excavation working face and dust falling required situations with large dust amount. The dedusting system consists of a compressed air adjusting and supplying pipeline, a water supply pressurization adjusting pipeline, a dustfall additive quantitative adding pipeline and a Venturi swirling ejector with a built-in double-fluid atomizing nozzle. In the method, a mixed solution of water with underground pressure no less than 3MPa and dustfall additive and the compressed air with underground pressure of between 0.3 and 0.7MPa are atomized by the double-fluid atomizing nozzle; water mist forms water mist jet flow with swirling strength and rigidness after passing through the Venturi swirling ejector so as to impact, stop and capture underground dust; and the dust-containing air flow is pumped by negative pressure and enters the Venturi swirling ejector, and is continuously impacted with the water mist to form secondary dustfall. The system has the advantages of simple structure and high dedusting efficiency, and is advantageous to reduce the water consumption amount for coal mine underground dedusting.

Description

Technical field [0001] The invention relates to a mine dust removal system and method, and is particularly suitable for the prevention and control of dust in underground mining operations. Background technique [0002] Most of the operations in underground coal mines are accompanied by the generation of a large amount of dust, which makes the dust pollution of underground operation sites extremely serious, directly endangering the safety of coal mine production and the physical and mental health of operators. In order to improve the working environment, most of them currently adopt different forms of dust removal measures. Among them, spray dust reduction has been widely used as a simple system, convenient control and reliable dust control technology, and the atomizing nozzle is spray dust reduction technology. The core component, because the nozzle structure is directly related to the shape of the mist flow and the size of the mist droplets, which directly affects the effect of ...

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Problems solved by technology

[0002] Most of the operation process in the underground coal mine is accompanied by a large amount of dust, which makes the dust pollution in the underground operation site extremely serious, directly endangering the safe production of the coal mine and the physical and mental health of the workers.

In order to improve the working environment, most of the dust removal measures in different forms are currently adopted. Among them, spray dust reduction is widely used as a dust control technology with simple system, convenient regulation and reliable use, and the atomization nozzle is the key point of spray dust reduction technology. The core component, because the structure of the nozzle is directly related to the shape of the mist flow and the size of the mist droplets, which directly affects the effect of dust removal

The patent (96117158.8) announced the "spray dust suppression method for preventing dust diffusion and its nozzle", which involves a kind of "hollow cone fog curtain for the purpose of dust suppression" and "solid cone fog curtain for the purpose of dust suppression" at the same time. Shaped mist column" atomizing nozzle, because the nozzle still adopts the method of pressure atomization, it has not improved in how to generate finer droplets; patent (200610076726.9) announced a "mine Dust Removal Method and Its Special Equipment” considers the reasonable arrangement of nozzles from the perspective of mine ventilation and temperature and humidity changes, and achieves the purpose of dust reduction through the fine mist droplets generated by gas and water atomization, but how to ensure the water mist jet flow? There are still deficiencies in the directionality and the strength of its collision with dust

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