Fully-mechanized excavation face self-adaptive foam dust-removing system

Abstract

The invention discloses a fully-mechanized excavation face self-adaptive foam dust-removing system. The fully-mechanized excavation face self-adaptive foam dust-removing system comprises a simulated dust-generating device, a dust detecting device, a foam generating device and a control system; the dust-generating device applies a rotary dust throwing mechanism and is closer to the actual tunnelingdust-generating condition; the dust detecting device is simple in sampling detection and reliable in data; the foam generating device can obtain foam with high foaming multiple and good wettability by adjusting the mixed ratio of gas to a foaming agent to water; the control system can control the opening degree of a servo valve and then control the flow quantity of the water, the foaming agent and compressed air by a self-adaptive method according to the dust concentration detected by the dust detecting device, so that and the use amount of the foam is reduced on the basis that the dust-eliminating requirements are met. The fully-mechanized excavation face self-adaptive foam dust-removing system is capable of automatically controlling the flow quantity of the foam according to the dust amount on a working face, providing uniform and stable foam, improving the dust-removing effect and preventing the waste of the foam agent, and is convenient to operate, intelligent, economic and efficient.

Description

technical field [0001] The invention relates to an underground dust removal system, in particular to an adaptive foam dust removal system for fully mechanized excavation working faces, and belongs to the technical field of underground dust removal. Background technique [0002] When the roadheader performs excavation and comprehensive operations, a large amount of coal ash dust will be generated in various processes such as the mining surface, transfer point, conveyor belt, ore crushing, and screening in the tunnel. According to statistics, without dust prevention measures, comprehensive excavation work The dust concentration on the surface is 1000~1500mg / m 3 , individual hard rock face can reach 3000mg / m 3 , the dust concentration of the fully mechanized mining face can reach 2500-3000mg / m 3 , not only cause serious pollution to the environment, but also cause great harm to the physical and mental health of workers, but also cause mine dust explosion accidents, which seri...

AI Technical Summary

Problems solved by technology

However, the foam agent is more expensive. In the past, the same foam was sprayed regardless of the dust concentration, which caused waste and affected economic benefits; and most of the existing foam generators use a net structure. surface, forming a liquid film, and foaming the foam liquid on the mesh surface with the help of a blower, but in practice, it is difficult to ensure that the foaming liquid is evenly dispersed on the mesh surface, and because the generated foam has too high a gas content, the foam is affected by wind flow The effect is easy to deform, the foam stability is very poor, and the dust removal effect is not obvious; there is also a foam dust removal system that uses Venturi negative pressure addition method, using water as the power to complete the absorption of the foam agent, but it is easy due to the limitation of the Venturi tube structure. If the negative pressure is unstable, it is difficult to meet the requirements of foam dust suppression for the stable addition of foaming agent with a small flow rate and low proportion, resulting in uneven and unstable foam, which affects the dust removal effect

Images