Research On High Efficiency High Pressure Water Mist Fire Fighting System In Long And Big Tunnel

High-pressure water mist with high efficiency, environmental protection, fire quickly, less water consumption, water damage loss, etc., in recent years has been widely used in libraries, ancient buildings, computer rooms, electrical switchgear, diesel generators, flammable liquid library and other fields. With economic development and technological level, higher road connecting towns as the main channel, especially in mountain areas during the construction of the highway, inevitably bring a lot of long highway tunnel. As a special building, highway tunnel complex, environmentally sealed, traffic volume, personnel-intensive, there are vehicle collision, vehicle collision, fire, and so may lead to the vehicle cargo fire threats. As the tunnel is a relatively closed narrow space, coupled with the characteristics of cars carrying fuel, is a large tunnel fire with smoke, heat problems, the rapid development of fire, fire fighting difficult, difficult evacuation, fire loss and other characteristics. Once the fire prone major property damage and many casualties..In this paper, stationary high-pressure tunnel water mist system for the study, theoretical analysis and system design using a combination of means of the tunnel fire, fire detection technology, the overall design of water mist systems and modular high-pressure water mist nozzles in-depth research. This chapter describes the status of the tunnel fire, and the tunnel characteristics of the shortcomings of the traditional fire-fighting systems, analysis of the water mist system in the tunnel of applications benefit from an overview of domestic and foreign research tunnel water mist system status; second chapter on the definition of water mist, formation mechanism and fire-fighting mechanism, compared with other types of water mist fire extinguishing system performance characteristics of the system; Chapter tunnel under tunnel fire characteristics and fire protection design specifications used in the design of high-pressure water mist systems tunnel and proposed a system control program; Chapter tunnel fire under the actual needs and the design of high-pressure water mist nozzle theory proposes a new modular high-pressure spray nozzle structure.