The principle of inertization is based on lowering the oxygen content of the combustible atmosphere to a level where fires or explosions are no longer possible. The decisive value is the limiting oxygen concentration: the lowest oxygen concentration at which flame propagation becomes impossible. This value depends primarily on the flammable substance, the kind of inert gas and also on temperature and pressure. PH1 stands a top in analyzing the client requirement and operation condition, offers full proof N2 Inertisation / Blanketing System for various applications including Storage Tank Blanketing, Truck Unloading Blanketing & Flammable Zone or Combustible AtmosphereInerting system.
N2 Blanketing for Storage Tanks
PH1 manufactures and supplies international level ATEX approved equipment for blanketing/ inerting Process. Most gases and vapors are no longer ignitable at room temperature and atmospheric pressure when the oxygen content in the inerted mixture is less than 10 vol%. Instead of inertization the term inert gas blanketing is usually used for tanks. A pillow of inert gas or atmosphere is lying above the liquid phase. The tank gas phase being inerted is connected to an inert gas supply net. Which of these systems the most favorable is, is depending on the amount of N2 required. This is depending on liquid AFR consumption, tank sizes/pressure design and climate. For continuous and stable N2 consumption, on-site inert gas generation becomes quickly economic.
N2 Inertization for Coal Mill
PH1 Offers N2 Inertization systems to avoid dust explosions and suppressing fires in silos, coal mills and filter equipment by creating an inert atmosphere. When CO-O2 temperature increases in the system and alarm triggered, the inerting process is initiated automatically through the process control system. Hence constant CO-, O2 – or temperature measurement and monitoring is absolutely mandatory in the operation.
In case of normal operation inerting starts with the smoke of the rotary kiln plant or from hot gas generator during the operation of a coal mill plant. In case of emergency shutdown or starting and stopping the coal mill plant, inert gas is injected.
PH1 adopts Blending method i.e. Flushing Method to suppress the fire hazard. Here the inert gas is purged at the highest possible speed, i.e. with a high entry impulse into different parts of the system that have to be inertized. As a result of the strong turbulence that is produced, the gas content undergoes thorough mixing and optimum inerting.
This high speed is reached through special nozzles in connection with the adjusted inert gas pressure at Controlling Station at the Inj. Skid. The number and size of nozzles are calculated according to a geometrical empty volume of the equipment which has to be protected. PH1 is expertise in making Layout and execution of the mechanical and electrical construction components of the complete inerting system in Coal Mills of Cement & Power Industry.
