Respect for Fire Protection and Care for Life begins with professionalism

Rebounding refers to the phenomenon of rapid detonation that occurs when a high-temperature incomplete combustion product (flue gas) from a fuel-rich combustion encounters fresh air.

The rekindling is a phenomenon in which the sudden burning of fresh air causes a sudden burning of hot smoke after a building-constructed fire with restricted ventilation enters anaerobic combustion or even smolder. It is a special fire phenomenon due to the abruptness of the rekindling fire. And its powerful destructiveness has brought great danger to the fire fighting of firefighters, and has seriously threatened people's lives.

The “backdraft” in fire dynamics has occurred in the past. However, we did not take it seriously. This tragedy finally occurred. It is necessary for us to re-examine the rationality of the current fire protection system. One of the development trends of modern architecture is that the indoor seal is getting better and better. The ancients did not pay attention to heating and air-conditioning, so there was almost no requirement for the tightness of the room, enough to use. Modern architectural design is not enough. Various building energy-saving measures depend on the tightness of the interior, which leads to a phenomenon that was rarely seen in the past. After a fire broke out in the room, there was not enough oxygen supply and the fire spread was slow. A large amount of combustibles (gases), which collect under the ceiling, cannot be burned due to lack of oxygen. According to the triangle of fire, this gas mixture is full of fuel and does not lack energy (ignition source), so the supply of oxygen is poor.

When the firefighters arrived, the door opened and the air immediately entered, so the air and high-density fuel were mixed violently. The ignition process started from the outside to the outside (the outer side first reached the expected stoichiometric ratio, so it was ignited first, so this spread back. The process is called rejuvenation, which produces a huge fireball (reaction zone) that rushes out of the door (with more oxygen outside the door), which is the phenomenon of rejuvenation. After a fireball, the energy in the room decreases, and a negative pressure is generated to suck the outside air, which provides energy and oxygen for the next round of positive pressure fireball. Usually only the first fireball is the most significant, and it is also the most dangerous fire scene. It is the main enemy of American firefighters.

What are the shortcomings of our fire protection system? It is the military service system that causes firefighters to cause firefighters to be temporary workers and lack sufficient knowledge, skills, experience and training to enter the fire scene.

According to the basic quality requirements for the firefighters entering the fire in the United States, firefighters who cannot find or have only a few out-of-date servicemen in the country may be eligible to enter the fire. Usually, they lack sufficient training to understand the dangers of the fire, so the more basic mistakes often occur, such as smoke poisoning and back-burning losses.

Therefore, I estimate that the impact of this incident on the domestic firefighting industry is that professional firefighting teams should first be born in Shanghai (Shanghai has the strength to do so and it needs to be in line with the world. The liberation of Shanghai before the liberation is in line with the fire work) This is not only to let firefighters have experience dealing with fire hazards, but also to make firefighters more capable of handling the cost of tens of millions of expensive fire-fighting equipment. It also allows firefighters to get a little higher after entering the campus. The work of popular science is more effective and one of the measures of professional pride.

If we want to allow 1.4 billion Chinese people to respect fire protection, we must start by improving the treatment of fire protection work. The existing system allows some “no hairless” young men to engage in dangerous work. It is really looking down on the arduousness of fire fighting work. The firefighters sacrificed by China are basically under 30 years old. The firefighters sacrificed by the United States are basically over 40 years old. The age itself includes a lot of experience, skills, professionalism and quality. This is an obvious gap.

The United States began a professional firefighting team in 1853. Japan began a professional firefighting team in 1918. The Chinese firefighting police force, which is based in Japan, gave up the opportunity to establish a professional firefighting team after 1949 and disbanded the volunteer firefighting force. It may be At that time, the community-based society needed it. Now that we are advocating people-oriented, professional firefighting will inevitably receive attention and development.

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