Smoke emission method in tunnel and tunnel ventilation system with separate smoke-emission device

Abstract

The invention discloses a tunnel smoke exhaust method, which includes: (1) isolating an independent smoke exhaust air duct in the tunnel, the smoke exhaust air duct is provided with a smoke exhaust damper, and an exhaust air duct connected with the smoke exhaust air duct; The smoke connecting air duct is equipped with a smoke exhaust fan; (2) The smoke exhaust duct, the smoke exhaust damper, the smoke exhaust connecting air duct and the smoke exhaust fan do not work under normal conditions; (3) when When the smoke needs to be exhausted in the tunnel, open the smoke exhaust damper near the smoke source, discharge the smoke from the opened smoke exhaust damper into the smoke exhaust duct, and then exit the tunnel through the smoke exhaust contact duct. The invention also discloses a tunnel ventilation system implementing the above method, and the ventilation system is provided with an independent smoke exhaust device. The invention solves the harm caused by fire smoke easily spreading along the longitudinal direction when longitudinal ventilation is adopted in the tunnel, and the ventilation system is energy-saving and safe, and is suitable for one-way and two-way tunnels with various cross-sections such as arched, circular and rectangular. .

Description

technical field [0001] The invention relates to a tunnel smoke exhaust method and a tunnel ventilation system with an independent smoke exhaust device. It is mainly used for ventilation in the tunnel and smoke exhaust in case of fire. Background technique [0002] During the operation of road tunnels, vehicle emissions such as CO, NO X When the concentration of harmful exhaust gas and smoke exceeds a certain value, it will bring harm to the drivers and passengers, affecting their health and driving safety. Therefore, in order to ensure the hygienic standard of the air environment required for the normal operation of the tunnel, the tunnel should be ventilated. At the same time, there are always potential hazards caused by car fires or leakage of dangerous goods transportation during tunnel operation, and disaster prevention ventilation should be considered. Therefore, it is a major issue in tunnel ventilation and disaster prevention to not only ensure a good air environme...

AI Technical Summary

Problems solved by technology

This will increase the tunnel excavation area and increase the soil construction cost

In addition, the full horizontal or semi-transverse ventilation method cannot make full use of the piston wind effect of the car, and the fan power is large, so it is not energy-saving, and the operating cost is higher than that of the longitudinal ventilation.

[0013] Among the three major ventilation methods, the longitudinal ventilation method has the characteristics of low construction and operation costs and easy maintenance, but the effect of disaster prevention is slightly worse

It is very difficult to ensure the safe escape of personnel in extra-long highway tunnels, especially when there is a large passenger flow

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