Heptafluoropropane fire extinguishing system is a common fire extinguishing system, which is usually divided into three types: pipe network, cabinet type and suspension type. Today, we introduce the external pressure storage heptafluoropropane, which is a kind of pipe network heptafluoropropane.
The difference between external pressure storage heptafluoropropane and internal pressure storage heptafluoropropane is that external pressure storage heptafluoropropane has a separate bottle group to store nitrogen, while internal pressure storage heptafluoropropane stores pressure internally. So there will only be one cylinder.
External pressure storage heptafluoropropane is to store liquid heptafluoropropane fire extinguishing agent in a container without pressurizing with nitrogen. The storage pressure is only the saturated vapor pressure of the extinguishing agent, while the compressed gas used as the power of the extinguishing agent is at a higher pressure. Please store in another container.
When the system works, the high-pressure power gas is decompressed through the pressure reducing valve and injected into the fire extinguishing agent storage bottle (at the same time, the bottle head valve of the container is opened), and the power gas drives the fire extinguishing to move rapidly along the pipeline network system (through the siphon and container valve) to practice and extinguish the fire at the sprinkler in the protection area.
Because the fire extinguishing agent and power gas are stored in different containers, two problems can be solved: one is that the fire extinguishing agent does not contact nitrogen during storage, and the gas will not dissolve in the fire extinguishing agent. Pressurize with nitrogen; After the system is started, the pressure of the extinguishing agent in the process of transportation and discharge is always higher than its storage pressure, and there will be no extinguishing agent vapor and nitrogen precipitation, which effectively reduces the two-phase flow of the extinguishing agent. Fire extinguishing agent during transportation.
Therefore, the extinguishing agent is stable in the flowing state during transportation, and the dynamic gas is always at the end of the extinguishing agent. External pressure storage heptafluoropropane drives the liquid extinguishing agent to move rapidly in the form of single-phase fluid in the pipeline. It is faster and more stable than the pressure storage system. It improves the ability of pipeline transportation of extinguishing agent, thus extending the transportation distance, increasing the discharge pressure of extinguishing agent, and realizing the use of thinner pipeline to transport more extinguishing agent.
External pressure storage heptafluoropropane is superior to internal pressure storage heptafluoropropane in fire extinguishing performance in some places, but it will bring higher price and larger floor area. Therefore, it is necessary to consider clearly when choosing, and the suitable one is good.
