Discussion on fire protection design of equipment

2022-07-29
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Discussion on the fire protection design of equipment room in high-rise buildings

the fire protection design of equipment room in high-rise buildings is an important part of closing the oil delivery valve after the sample breaks in the fire protection design of high-rise buildings. Due to the increasingly complex functions of modern high-rise buildings, it is developing towards intelligence. In these buildings, in order to meet various requirements for its analog input processing circuit to reach the maximum frequency band width of 10Hz, special equipment rooms are usually set up, such as computer room, security monitoring room, high and low voltage power distribution room, diesel generator room, etc. According to the specific building requirements and functions, the equipment or its composition is also different. Therefore, in the selection of fire protection system for equipment room, appropriate and economic fire protection system should be selected. However, in today's engineering design, there are still some inappropriate system choices. Under the same requirements, economic factors are less considered

1 type and analysis of automatic fire extinguishing system

1 1 carbon dioxide fire extinguishing system

carbon dioxide fire extinguishing system is generally a pipe fire extinguishing system, which is a fixed device, and is mainly applicable to: ① solid surface fire, deep fire of some solids (such as cotton and paper) and electrical fire; ② Liquid or soluble solid (such as paraffin, asphalt, etc.) fire; ③ The gas fire that can cut off the gas source before extinguishing the fire has light weight and high intensity. The defect of the system is that it is easy to cause explosion if the design is unreasonable, the equipment maintenance cost is high, and it has an impact on environmental protection [1]

    1. 2 Halon series fire extinguishing system

Halon series fire extinguishing system is widely used in China and the world because of its high fire extinguishing efficiency, short fire extinguishing time, low engineering investment and low maintenance cost. However, due to the toxic effect of this series of fire extinguishing systems on people and the destruction of the ozone layer in the atmosphere, relevant United Nations agencies have repeatedly formulated international conventions to prohibit the use of Halon systems

Halon series fire extinguishing systems are applicable to: ① solid surface fire (such as paper, wood, plastic, rubber, etc.) and electrical fire (such as power transformation and distribution equipment, generators, motors, cables, etc.); ② Liquid fire (such as kerosene, gasoline, alcohol, benzene, etc.); ③ Gas fire (such as methane, ethane, gas, etc.)

    1. 3 water spray fire extinguishing system

water spray fire extinguishing system is a type of fixed automatic fire extinguishing system, which is developed on the basis of automatic sprinkler system. The water flow is decomposed into small water droplets by a special water mist nozzle to extinguish the fire. In the process of extinguishing the fire, the small water mist droplets can be completely vaporized to obtain the best cooling effect. At the same time, the water vapor expands 1680 times, resulting in asphyxiating environmental conditions. When extinguishing the fire of water-insoluble flammable liquid, the impact and mixing of water mist droplets can produce a non combustible emulsion layer on the surface of flammable liquid, If the combustible liquid is dissolved in water, it can produce dilution effect [2]. Water mist has its own electrical insulation performance, which can be safely used for electrical fire fighting. The application scope of water spray fire extinguishing system is currently concentrated in the industrial field, and the protection objects are mainly special equipment and devices. For example, large transformers, oil switches, flammable liquid storage tanks, pump valves, hydraulic devices and garage in power enterprises. It is characterized by simple equipment, less investment and low maintenance cost, but the system requires high water pressure and large water volume to ensure the accuracy level

    1. 4 dry powder fire extinguishing system

dry powder fire extinguishing system is applicable to solid surface fire, liquid fire and gas fire, but it is widely used in the first two types of fire. Automatic dry powder fire extinguishing system is generally the linkage of automatic fire detection system and dry powder fire extinguishing system. Although the system has good fire extinguishing effect, it has relatively large investment, and solid dry powder fire extinguishing agent can not effectively solve the problem of re ignition

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