Vortex flow-rotational flow dual-field air separator dust control method and device for tunneling face

Abstract

The invention discloses a vortex flow-rotational flow dual-field air separator dust control method and device for a tunneling face. Fresh air flow ejected from a forward air outlet flows to the head of a roadway along the wall face of the roadway, dust-containing air flow is formed after the fresh air flow carries dust, the dust-containing air flow flows into an air suction barrel in an entrainment mode to be sucked away under the blocking effect of the wall face of the roadway and the negative pressure effect of a suction opening, the remaining dust-containing air flow and the fresh air flow ejected by the forward air outlet converge, flow towards the head-on direction and are controlled in vortex air, and are entrained and sucked into a cylinder of the suction opening again to be sucked away, so that a vortex flow dust control area is formed, the fresh air ejected from a lateral air outlet is ejected to a flow guide plate to form reverse rotational flow air, and the vortex flow dust control area and a rotational flow blocking area move along with a heading machine. A vortex flow-rotational flow dual-field air separator dust control device is also disclosed. According to the vortex flow-rotational flow dual-field air separator dust control method and device, the vortex field and the rotational flow field move forwards along with the heading machine to form two-area dust control, the technical problem of gas accumulation is solved, operation is easy and convenient, the high-altitude operation risk is small, and the optimal dust control effect can be kept without adjusting the position of an onboard air distributor.

Description

technical field [0001] The invention relates to the field of dust control on the excavation surface, in particular to a "vortex-vortex" two-domain wind dust control method and device for the excavation surface. Background technique [0002] According to the "China Mining Industry 2019 Report", by the end of 2018, the confirmed resource reserves of coal were 1,666.673 billion tons. In 2018, 109 newly discovered mineral resources and 8 coal mines were discovered across the country; there are 3 places that can mine more than 5 billion tons of new coal mines. Coal production ranks first in the world for many years. It can be seen that coal, as my country's energy source, will remain an important cornerstone of my country's sustainable economic development for many years to come. In the process of mining coal resources, the problem of dust has always been a major difficulty in the process of coal mining, which seriously affects the safety and efficiency of mining work. Innovat...

AI Technical Summary

Problems solved by technology

In the process of mining coal resources, the problem of dust has always been a major difficulty in the process of coal mining, seriously affecting the safety and efficiency of mining work

[0003] If no protective measures are taken for the coal dust produced by the roadheader, the coal dust concentration at the working face will reach 1300mg / m 3 , and even the coal dust concentration in the local working area can reach 3000mg / m 3 , but even with the more popular wall-attached air duct technology, the dust control effect is still limited

Because the traditional wall fan technology needs to adjust the position of the wall fan in time, as the excavation surface advances, the dust control effect changes greatly

In addition, the weight of the wall-attached air duct is relatively large, requiring at least two workers to work at heights, which is highly dangerous, and the workers have low enthusiasm for operation, making it difficult to promote

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