Presentation of the basis of selection of automatic fire extinguishing systems Drencher

Presenting the basis for choosing Drencher automatic fire extinguishing system to protect houses and buildings? Advantages and disadvantages in consulting, design, supervision, construction and installation of Drencher automatic fire extinguishing systems for individuals and businesses.

Analysis of fire and explosion hazards of the production technology process that houses and buildings need to be protected

+ Fire hazard properties of combustible substances

+ Locations where fire may appear and the direction of flame propagation

+ Indication of fire characteristics, to select fire detectors and automatic fire extinguishing systems

+ Determination of fire group (group, class) of production

• Conduct research, evaluate and analyze the layout and installation characteristics of machines and premises
• Climate analysis of the protection room: temperature, humidity, light, pressure to choose the system

+ The fire represents a rapid increase in temperature – a fire that develops rapidly in just a few minutes causes huge material damage. When a fire occurs, the free burning time is not more than 10 minutes, the combustible substance is a flammable substance.

+ For this project, it is recommended to use the Drencher automatic fire extinguishing system at the first stage.

+ When choosing an automatic fire fighting system, it is necessary to determine the production scale of the facility, the damage caused by the fire and the investment to install an automatic fire extinguishing system.

• Based on the importance of the facility, the fire hazard group of the production technology in the protection room and the type of combustible material, select the calculated flow, spray intensity, and fire fighting time accordingly. . This is an important parameter to ensure the effectiveness of the automatic fire extinguishing system
• Based on the extinguishing agent and fire fighting method to determine the fire extinguishing system
• Based on the determining factors of the fire and the consequences of the room, we choose the type of fire detector and the necessity of the quick operation of the fire detector
• Select block to receive signal and fire alarm information
• Start signal block (automatic fire extinguishing system) and fire alarm center
• Excitation system (automatic fire extinguishing system)
• The system of transporting extinguishant into the protection room, selecting the type of nozzle and arranging the pipeline route, the position of the nozzle and calculating the network hydraulics - selecting and calculating the equipment to transport the extinguishing agent. In this case, it is necessary to determine the spray intensity in accordance with the standard
• Equipment containing fire-extinguishing substances
• Control device of the system: starter – test device – valves, control center or manual starting devices
• Instruments - test to check mobility (in start-up and signal state)

+ Signal + start + extinguishing agent

+ Working parameters (flow, pressure ...)

After completing the above tasks, it means that the system has been selected. We calculate the time to put the system into work, not exceed the allowed time
Time to spray the stored extinguishing agent into the protection room (this time does not exceed the calculated fire fighting time)
The basic indicators of reliability should not be greater than the allowable ones

*Difficulty: Large volume of fire fighting water, economic cost

- During the design process: high level is required.

- In the process of installation, operation and use: costly in terms of investment, installation and use requires highly technical staff, using costly zone dividers. Requires high accuracy, comes with an automatic fire alarm system, if the activation system fails, the Drencher system works, damaging goods, affecting and causing great damage in the production process.

(The above material is updated from the University of Fire Protection)