空气流量对储罐硫腐蚀产物氧化自热过程的影响

The impact of air flow rate on the oxidation self-heating of sulfur corrosion products in oil tank

通过搭建硫化氧化试验系统,通入由硫化氢与氮气充分混合的硫化气体（VH2s∶VN2=2∶3）,模拟含硫油品储罐硫腐蚀产物的生成,探究硫腐蚀产物在与汽油储罐、柴油储罐和原油储罐环境相似的试验条件下不同空气流量对其氧化自热的影响.结果表明：空气流量对硫腐蚀产物的氧化自热过程影响较大,随着空气流量的增加,硫腐蚀产物氧化自热过程中最高温度值Tmax、最大温升速率均先增大后减小,氧化自热倾向性最大的空气流量区间为400～450 mL/min.对于汽油储罐、柴油储罐,在空气流量400 mL/min时,储罐硫腐蚀产物自燃的风险最高;而对于原油储罐,在空气流量为500 mL/min时,硫腐蚀产物氧化反应温升幅度最高,储罐自燃的风险最高.

The oxidation law of the sulfurized product in petrol tanks, diesel tanks and crude oil tank at different air flow rate was researched by building test bench. The generation of sulfur corrosion products of oil tank which was used for sour oil was simulated under sulfide gas mixture of H2S and N2 （VH2s ： VN2 = 2 ： 3）. Studies showed that air flow rate had a significant im- pact on the oxidation and spontaneous combustion of sutfurized product in oil tanks. The maximum oxidation temperature and oxidative tendency of the sulfurized product first increased then decreased as the increase of air flow rate. The maximum oxida- tion tendency for air flow rate was from 400 mL/min to 450 mL/min. The risk of spontaneous combustion and temperature rise of oxidative reaction got their peaks when the air flow rate was 500 mL/min in crude oil tanks. The risk of spontaneous combustion got its peak when the air flow rate of sulfur corro- sion products was 400 mL/min in gasoline tanks and diesel tanks.