Micro-mist dust suppression method based on coal cutter cutting dust sources

Abstract

The invention relates to a micro-mist dust suppression method based on coal cutter cutting dust sources. Coal cutter cutting dust generation is divided into four different dust sources, and differentmist spraying modules are installed at corresponding positions of a coal cutter to conduct dust suppression on the dust sources. Mist fluid is sprayed by the mist spraying modules, and according to atomization parameters, the mist spraying amount and the dust concentration, particle size distribution, dispersion degree and dust generation amount of dust generated by different dust sources, a dustsource area is misted, so that the dust generated by coal cutter cutting is collided with mist drops of the mist fluid, coagulated and captured and settles in the initial state, and the capacity of capturing inhalable dust with the particle size of 10 micron or below is especially improved. The method fully considers a body structure, movement features and use conditions of the coal cutter, and adesigned dust suppression system has a certain anti-smashing performance and is reliable in use and convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of coal mine production, in particular to a dust suppression method in a coal mine, in particular to a micro-fog dust suppression method based on cutting dust sources by a coal shearer. Background technique [0002] The largest dust generation in coal mining face is the cutting dust produced by the shearer, which accounts for about 80% of the dust production in the entire working face. The dust-proof measures of the shearer mainly adopt the method of internal and external spraying. The dust-extinguishing effect of the internal spray is better, but the nozzle is easy to block and fail. Mist flow barrier to reduce dust generated when drum cutting coal. [0003] With the continuous progress of science and technology, modern coal shearer external spray adopts new technologies such as high pressure spray technology, air curtain dust separation technology, foam dust removal technology, shearer dust suction drum, ...

AI Technical Summary

Problems solved by technology

The layout of the external spray cannot be specific to the dust source cut by the shearer, so that the shearer moving along the working face at any time cannot cover the dust source. At the same time, affected by the wind flow, the dust generated by the shearer cutting is easy to spread to the downwind flow and sidewalk side

2) It cannot adapt to the specific situation of coal shearer cutting dust production

The mist fluid sprayed by the external spray cannot be equivalent to the shearer cutting dust concentration, dust particle size distribution, dispersion, dust emission speed, dust production, etc., so that the mist flow and mist droplets are affected by the wind flow during the process of condensing dust particles, and the mist droplets Evaporate and the dust spread again, the dust suppression effect becomes worse, especially the inhalable dust below 10μm (5μm) cannot be effectively suppressed and captured

In addition to the above, there are still the following problems in the external spraying system of the coal mining machine: 1) The external spraying system consumes a lot of water. On the one hand, it is easy to wet the clothes of the miners on site and affect their working experience; Affect coal quality, reduce coal calorific value

2) Due to design defects and restrictions on use conditions, the external spray system is easily affected by falling coal bodies, abnormal extrusion during use, etc., which makes the external spray system damaged and invalid

[0004] To sum up, the existing shearer spray system is difficult to fundamentally solve the related problems of coal shearer cutting dust production and concurrent

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