| Working face mine dust is one of the most polluted areas of high dust concentration mechanized excavation face, respirable dust than the major, high free silica content, very serious bodily harm to the miners.By reading a lot of literature, according to the basic theory of fluid mechanics, the theoretical study of the air amplifier, multiple air amplifier theoretical calculation, developed a modular air amplifier and be found. According to the needs of mechanized excavation face dust and ventilation requirements of the relevant parameters to determine the dust blower, this dust blower as the air amplifier using modular suction power, air volume ranges: 250 ~ 400m3 / min. Swirl dust blower air amplifier consists of a combination of air amplifier, disc atomizer, diffuser, dehydrators and other ancillary equipment. The main components of the air amplifier dusting fan design and manufacture, tested 38 times zoom obtain modular air amplifier, tested obtain the best combination of air supply pressure amplifier is 3MPa, measure the efficiency nebulizer dust Relationship between water pressure, and when the radius of curvature of the vanes of 180 mm, the resistance of small wind turbine system. This paper developed in Baodian coal mine dust blower 7309 were mechanized excavation face industrial test, as measured by tests at different water pressure, gas pressure, air volume Dust Blower(processing capability dust romantic) and dust efficiency, when the water pressure is 3MPa, supply pressure is 0.7MPa, dust to achieve the best efficiency. Dust Blower by combining with the existing dust control measures greatly improve the efficiency of mechanized digging surface dust. ANSYS FLUENT 14.5 software by the application of dust control results Mechanized Roadway simulation in order to obtain the changes in the roadway space dust concentration by the results and industrial experiments comparing the measured, the measured results are consistent with the simulation results. Dust Blower air amplifier type with respect to the ordinary dust blower not only high safety factor, and light weight, easy transportation and installation, no electricity, reducing energy consumption, with high practical value. |
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