Self-adsorption air foam-based foam dust suspension system for tunneling machine

Abstract

The invention discloses a self-adsorption air foam-based foam dust suspension system for a tunneling machine, and is particularly suitable for dust control of underground coal mine fully-mechanized excavating working faces. The system mainly comprises a water pressing pipeline, a flow adjusting valve, a mechanical flowmeter, a shock-proof pressure meter, a gas-driven liquid booster pump, a foaming agent container, a self-adsorption air rotational flow foaming device, a liquid adsorption pipe, a foam conveying main pipe, a foam conveying branch pipe and a foam spray head, wherein high-pressure water flow passes through an inlet of the self-adsorption air rotational flow foaming device to form high-speed jet, and air in the environment and the foaming agent are automatically sucked, so that the full mixing of the foaming agent, water and air is realized to further generate dust suspension foam; and the foam is sprayed to a dust-generation slicing part of the tunneling machine by the foam spray head. The system does not include electrical elements, is safe, reliable, easy to operate and maintain, and small in water consumption amount, and has wide practicability; and the dust control effect of the fully-mechanized excavating working faces can be improved.

Description

technical field [0001] The invention relates to a roadheader foam dust suppression system based on self-suction air foaming, and is especially suitable for controlling the cutting dust of the roadheader. Background technique [0002] The high-concentration dust generated during the cutting of coal and rock mass by roadheaders is not only one of the main disasters that restrict the safety of coal mine production, but also the most important occupational hazard that endangers the health of tunneling workers. Compared with conventional dust suppression media such as water spray used in tunneling working faces, foam has the characteristics of large contact surface, good wettability and strong adhesion, which can significantly improve the dust suppression effect. However, the current foam dust suppression system used in fully mechanized excavation working faces all adopts the compressed air foam production method, that is, the compressed air pipeline is laid to press the compress...

AI Technical Summary

Problems solved by technology

However, the current foam dust suppression system used in fully mechanized excavation working faces all adopts the compressed air foam production method, that is, the compressed air pipeline is laid to press the compressed air into the foam generator to mix and foam with the foaming liquid, which increases the complexity of the system. It brings great inconvenience to debugging and operation, reduces the stability and reliability of system operation, and the foaming rate is low

In addition, under the action of press-in ventilation air flow, high-concentration dust is distributed on the return air side of the excavation, and the dust concentration on the air intake side is lower. However, the existing foam dust suppression system fails to distribute to the air intake side, return air The foam volume of the foam nozzles on the side is combined with the dust concentration in the area, that is, the same amount of foam is distributed to them, which not only reduces the dust suppression effect, but also causes low foam utilization.

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