Three-dimensional multidirectional rotational flow air curtain dust settling device and method for fully-mechanized excavation face

Abstract

The invention discloses a three-dimensional multidirectional rotational flow air curtain dust settling device and a method for a fully-mechanized excavation face. The three-dimensional multidirectional rotational flow air curtain dust settling device comprises an integrated excavator, wherein a pressing type air duct extending to a position above a tunneling facing head of the fully-mechanized excavation face is arranged at the upper part of the integrated excavator, a multidirectional rotational flow air curtain generating device is arranged at the front end of the pressing type air duct and comprises a barrel adaptive to the pressing type air duct, an axial and radial ratio adjsutign plate is arranged at the upper part of the barrel, a plurality of built-in guide screens are arranged at the lower part of the barrel, a plurality of radial air outlet clearances are formed between two adjacent built-in guide screens, an air outlet is formed at the bottom of the barrel, a wet dust removal fan is arranged at the bottom of the integrated excavator and is provided with a drawable air barrel, and the drawable air barrel extends to a position under the tunneling facing head of the fully-mechanized excavation face. Multi-directionally radial air flows impact the wall surface of a roadway and can blow to the whole cross section of the roadway at certain rotating speed along the wall surface of the roadway under the wall attachment effect, so that the multidirectional rotational flow air curtain capable of covering the whole cross section of the roadway can be formed.

Description

technical field [0001] The invention relates to the field of prevention and control of flour dust in fully mechanized excavation work in coal mines, in particular to a three-dimensional multidirectional swirling air curtain dust suppression device and method for fully mechanized excavation working faces. Background technique [0002] With the improvement of the modernization level of coal mine production in our country, the roadway comprehensive mechanized excavation technology is also developing rapidly. However, while the excavation speed of the working face continues to increase, the dust concentration on the job site also increases significantly. The high concentration of dust on the working face not only easily leads to coal dust explosion, but also causes pneumoconiosis, which endangers the health of workers and seriously restricts the safe and efficient production of coal mines. Therefore, it is imminent to improve the method of flour dust control and dust control te...

AI Technical Summary

Problems solved by technology

The one-way swirling air curtain is formed by the single-direction radial air outlet slot jet flow of the attached wall fan. In order to form a better swirling air curtain, a longer radial air outlet slot is required, resulting in the wall attached fan being as long as 5 -10m, which brings difficulties to the installation and transportation of these devices and affects the popularization and application of this technology

In addition, there are many on-site excavation and transportation equipment in the fully mechanized excavation working face, and the volume is large. The one-way swirl air curtain air flow field formed by the wall-attached air duct is easily disturbed by the equipment, which hinders the radial coverage of the entire section of the roadway, causing dust The outward diffusion of the leaves a gap

[0004] To sum up, at this stage, relevant researches have been carried out at home and abroad on the theory and technology of swirling air curtains to block dust dispersion in fully mechanized excavation working faces, and many research results have been obtained, but there are still large volume movements of swirling air curtain generating devices Inconvenient, one-way swirling air curtain is difficult to cover the whole section and other problems

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