Fire smoke prevention and exhaust method and system based on air-fog mixed flow air curtains and used for high-rise building

Abstract

The invention discloses a fire smoke prevention and exhaust method based on air-fog mixed flow air curtains and used for a high-rise building. The fire smoke prevention and exhaust method based on the air-fog mixed flow air curtains and used for the high-rise building is characterized in that at least two air supply ports capable of generating the air-fog mixed flow air curtains are formed in the top of a staircase corridor, and a smoke prevention isolation area is formed between the adjacent air-fog mixed flow air curtains; and a first smoke exhaust port is used for intensively exhausting smoke in the smoke prevention isolation area, and a second smoke exhaust port can exhaust the smoke blown to the bottom of a corridor in time, so that the smoke is prevented from being blown to a lower space of the building required by personnel escape, and the smoke diffusion blocking capability of the air-fog mixed flow air curtains is enhanced. According to the invention, the high-temperature toxic smoke generated by a fire within a certain period of time cannot be randomly diffused to an evacuation passage of personnel, and meanwhile, the smoke in the isolation area is intensively exhausted, so that the purposes of facilitating safe evacuation of the personnel and reducing fire loss are achieved.

Description

technical field [0001] The invention relates to a fire prevention and smoke exhaust method for high-rise buildings, in particular to a high-rise building fire smoke prevention method and system based on an aerosol mixed-flow air curtain. Background technique [0002] From January to October 2020, a total of 196,000 fires were reported, resulting in 889 deaths and 583 injuries. The direct property loss was as high as 2.55 billion yuan, which is equivalent to a fire every two minutes. Fire is still the most threatening disaster to our lives. From January to October, a total of 85,000 fires occurred in urban and rural residential buildings in my country, accounting for 42.9% of the total. At the same time, the casualties caused by residential fires are the largest among all fires. A total of 684 people were killed and 389 were injured this year, accounting for 76.9% and 66.7% of the total respectively. At present, the methods of smoke prevention and exhaust in high-rise buildin...

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Problems solved by technology

[0003] 1) Natural smoke exhaust method: easily affected by factors such as outdoor wind direction, air flow, and wind speed, and the smoke exhaust efficiency is unstable

[0004] 2) The mechanical smoke exhaust method in the front room: the smoke will spread to the stairwell, which is not conducive to the safe evacuation of personnel

[0005] 3) Mechanical pressurization in the front room and smoke exhaust in the corridor: It is difficult to maintain sufficient positive pressure in the stairwell and the front room, and it is difficult to achieve good results in practical applications. A large amount of fresh air inflow will fuel the fire, and it is necessary to Larger air supply and exhaust systems occupy a larger building space, which increases the construction cost and space occupation

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