常压可燃液体储罐氮封工艺系统设计

The Design of Nitrogen Sealing Process System for Atmospheric Combustible Liquid Storage Tank

氮封系统是将氮气作为保护气体充入液体容器顶部的保持压力恒定的保护系统,隔绝储罐内的介质与外界空气接触,防止所储存的物料挥发、被氧化或者吸水变性等,同时也起到保护容器安全的作用。其主要应用于化工、环保、石油、水处理、医药等行业,需要采用常压储罐储存的原料种类繁多,如通常工艺生产需要存放的各种油品、石化原料、化工产品等。目前,针对大型甲B、乙A类液体的储罐,为避免物料挥发可能产生的易燃爆炸危险性气体在储罐顶部聚集,或者为避免这些物料与空气中的氧气接触而发生氧化变性,常采用氮气在储罐顶部充满整个空间,使物料与外界隔绝以起到保护作用。

The nitrogen sealing system is a constant pressure protection system that uses nitrogen as a shielding gas to fill the top of the liquid container.It can isolate the medium in the storage tank from contact with the outside air,prevent the stored materials from volatilizing,being oxidized or water-absorbing and denatured,and also protect the container.It is mainly used in chemical,environmental protection,petroleum,water treatment,pharmaceutical and other industries.It needs to use a variety of raw materials stored in atmospheric pressure storage tanks,such as various oil products,petrochemical raw materials,chemical products,etc.that are usually stored in the process.At present,for the storage tanks of large class A B and B liquids,it is necessary not only to avoid the accumulation of flammable explosion dangerous gases generated by the volatilization of materials at the top of the storage tank,but also to avoid oxidative degeneration of the materials in contact with the oxygen in the air.Nitrogen is often used to fill the entire space at the top of the tank to protect the material from the outside world.