Supersonic speed gas atomization sprayer

Abstract

The invention discloses a supersonic speed gas atomization sprayer which comprises an outer shell and an inner spraying pipe assembled inside the outer shell. The outer shell is provided with a spraying outlet sealing stepped cylindrical hole, an air intake hole pressing stepped cylindrical hole and a water inlet. An inner cavity with holes in the side face is defined by the outer wall face of the inner spraying pipe and the inner wall face of the outer shell. The water inlet communicates with the inner cavity. The inner spraying pipe is provided with an air intake hole and a spraying outlet. A mixing chamber is defined by the area between the spraying outlet and the laryngoneck portion of a Laval convergent-divergent pipe; a liquid membrane circular seam is formed in the side wall of the mixing chamber, and the inner cavity communicates with the mixing chamber through the liquid membrane circular seam. Through high-speed airflow and shock wave atomization, the supersonic speed gas atomization sprayer is capable of saving energy and water, low in requirement for water pressure and pipelines, capable of forming fine mist more easily, and excellent in diffusion effect, atomization effect and dust removal effect, and the situation of the sludgy downhole environment caused by wet dust removal is avoided.

Description

technical field [0001] The invention belongs to the field of spraying and dust suppression of respirable dust particles deposited underground in coal mines, and in particular relates to a supersonic gas atomization nozzle. Background technique [0002] Dust is one of the five natural disasters in coal mines. With the continuous improvement of coal mine mechanization and automation level, while bringing huge economic benefits to coal mines, it also brings serious harm. When the dust concentration reaches a certain level, it is very easy to produce a dust explosion, causing huge loss of life and property. In addition, dust is extremely harmful to human health, especially small particle size particles. Coal miners are prone to occupational pneumoconiosis when they are exposed to high-concentration dust for a long time. Therefore, it is an important task for coal mine safety to study and further solve the long-standing problem of mine dust pollution and take effective measure...

AI Technical Summary

Problems solved by technology

After years of on-site use experience, some main problems of dust removal nozzles in coal mines have been summarized, such as: high-pressure water atomization is often used in coal mines to form sprays, which consumes a lot of energy and has high requirements for water supply pipes; in addition, the requirements for dust removal water The water quality requirements are high, and strict filtration is required, otherwise the nozzle holes are easily blocked, affecting the spray effect, or even unable to work; the water mist for dust removal is not fine enough, the diameter of the droplets is large, the atomization effect is poor, and the diffusion effect is poor; resulting in consumption during the dust removal process A lot of water, causing waste of water resources, will also cause muddy roadways and affect coal quality

Patent 21310567927.9 also proposes an aerosolized spray nozzle. Firstly, the vent hole (234) is too small and is an ordinary cylindrical hole. The air velocity of the atomization will not be very large, and internal backflow will be caused, while the gas-liquid flow ratio And the gas-liquid relative velocity difference is a key factor affecting the gas atomization effect, which directly determines the size of the mist particle diameter; secondly, the water inlet hole (250) on the side wall of the inner core is a circular hole, which is not conducive to the expansion of the liquid film; Three, the spray hole cover (30) hinders the diffusion of the mist, so that the high-speed mist decays quickly, reduces the dust removal distance and the relative speed of the mist and dust in the dust removal process, and reduces the dust collection probability of the mist. Finally , the low-speed aerosol has little entrainment effect on the dusty airflow around the nozzle, which is not conducive to the continuous and efficient dust reduction process

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