固定顶储罐液下喷射泡沫灭火技术

与液上喷射泡沫灭火系统的相比，液下喷射泡沫灭火系统具有安全可靠，灭火速度快，省投资等优点，但却存在单阀易渗漏问题。针对这一问题，提出了通过在单向阀和控制阀之间增设爆破片，或在灭火系统泡沫喷口处设置泡沫带以及改善单向阀密封性能等解决办法。

Under-liquid Foam Extinguishing Technology Used on Fixed Roof Tank

The under-liquid foam extinguishing system is safe,reliable and easy to put out a fire with a low cost, its defect is leakage in the check valve. This problem can be solved by means of installing the rupture disk between the check valve and control valve,or mstalling form hose at the jet nozzle of the system and improving the seal's performance of the check valve. What should be pay attention to in selecting the rupture disk is its material,explosive pressure and applied location. The under-liquid form extinguishing technology has a wide application perspective on the fixed roof tanks which store gasoline,diesel oil,kerosine,lube oil and crude oil.