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Tunnel ventilating and demisting system

A tunnel ventilation and in-tunnel technology, which is applied in mine/tunnel ventilation, mining equipment, earthwork drilling, etc., can solve the problems of not being able to reduce fog from the source and unsatisfactory demisting efficiency, and achieve good demisting efficiency, The effect of reducing the generation of fog

Pending Publication Date: 2022-04-01
SINOPEC NINGBO ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional solution is to install wire mesh demisters in tunnels in mountainous areas, and remove the mist through the wire mesh demisters, but the wire mesh demisters mainly eliminate the mist entering the wire mesh demisters, and cannot interfere with the mist The four necessary conditions for the formation, the water vapor in the tunnel will continue to evaporate from the tunnel wall or the hot and humid air entering from the tunnel mouth will be mixed with the cold air of the tunnel to precipitate, that is, the generation of fog cannot be reduced from the source, and the demisting efficiency not ideal

Method used

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  • Tunnel ventilating and demisting system
  • Tunnel ventilating and demisting system
  • Tunnel ventilating and demisting system

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment one: if figure 1 As shown, a tunnel ventilation defogging system includes at least one defogging unit 1 arranged in the tunnel, and the defogging unit 1 includes a return air pipe 2, a defogging unit 3 and an air supply pipe 4 distributed along the length direction of the tunnel, The air return pipe 2 and the air supply pipe 4 are respectively connected with the defogging unit 3. The return air pipe 2 is provided with a plurality of return air outlets 21 distributed along the length direction, and the air supply pipe 4 is provided with a plurality of air supply outlets distributed along the length direction. Tuyere 41.

[0019] In this embodiment, one demisting unit 1 is provided, and the demisting unit 1 is located at the top of the tunnel.

[0020] In this embodiment, the wind speed of the air supply port 41 is greater than or equal to 6 m / s, and the wind speed of the return air port 21 is greater than or equal to 3 m / s.

Embodiment 2

[0021] Embodiment two: if figure 2 As shown, the remaining parts are the same as in Embodiment 1, the difference is that there are two defogging units 1, and the two defogging units 1 are distributed on both sides of the tunnel, and the return air pipe 2 in one defogging unit 1 is connected to the The air supply pipe 4 in the other defogging unit 1 corresponds to all the air return ports 21 on the air return pipe 2 and all the air supply ports 41 on the corresponding air supply pipe 4 are distributed in a misaligned manner.

Embodiment 3

[0022] Embodiment three: as Figure 2-4 As shown, the remaining parts are the same as in Embodiment 2, except that the demisting unit 3 includes a unit frame 31, an insect-proof net 32, an inertial demister 33, a wire mesh demister 34, a sump 35, a ventilation fan 36, Air supply air valve 37 and electric control box 38, air inlet 311 and air outlet 312 are arranged on unit frame 31, insect-proof net 32 ​​is arranged at air inlet 311, return air pipe 2 is connected with air inlet 311, inertial demister 33. The wire mesh demister 34, water collection tank 35 and ventilation fan 36 are arranged in the unit frame 31, the air supply air valve 37 is arranged at the air outlet 312, the air supply pipe 4 is connected with the air outlet 312, and the insect-proof net 32, Inertial demister 33, wire mesh demister 34, ventilation fan 36 and air supply air valve 37 are arranged in sequence along the straight line, water collection tank 35 is arranged below inertial demister 33 and wire mes...

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Abstract

The invention discloses a tunnel ventilation demisting system which comprises at least one demisting unit arranged in a tunnel, each demisting unit comprises an air return pipe, a demisting unit and an air supply pipe which are distributed in the length direction of the tunnel, and the air return pipes and the air supply pipes are connected with the demisting units respectively. The air return pipe is provided with a plurality of air return ports distributed in the length direction, and the air supply pipe is provided with a plurality of air supply ports distributed in the length direction. The demisting device has the advantages of being capable of interfering mist formation and effectively improving demisting efficiency.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, in particular to a tunnel ventilation and demisting system. Background technique [0002] The formation of fog requires the four necessary conditions of water vapor, condensation nuclei, cold air and airflow stability. Taking the tunnel environment in some mountainous areas as an example, there is enough water vapor in the tunnel, and the temperature inside the tunnel is much lower than the temperature outside the tunnel. The temperature difference between the inside and outside of the tunnel is large, and the two necessary conditions of water vapor and cold air are already met. Due to the sparsely populated mountainous area and few passing vehicles, when fewer vehicles pass through the tunnel in the mountainous area, a stable airflow will be formed in the tunnel in the mountainous area, and vehicles will also bring sufficient condensation nuclei. At this time, the tunnel in the mounta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F3/00E21F1/00
Inventor 蒋峰暴长玮
Owner SINOPEC NINGBO ENG
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