Experimental Study on Inert Replacement Ventilation of Oil Vapor in Oil Tank

The elimination of oil vapor in oil tank is one of the most dangerous tasks in oil depot. Using common mechanical ventilation to deal with the oil vapor has the shortcomings of poor safety, long ventilation time and low efficiency. However, those shortcomings can be better overcome if combusted gas is used to displace oil vapor. In this paper, the experimental study on inert replacement ventilation of oil vapor is carried out in a simulation oil tank. Results show that: 1) the larger the flow volume is, the higher the efficiency will be; 2) the efficiency of inert replacement under the condition of top inlet is higher than that under the condition of bottom inlet when the flow volumes are same; 3) under the condition of top inlet, the concentrations of oxygen and oil vapor at outlet can be regarded as criteria for judging whether the oil tank's inner state is safe or not, however, under the condition of bottom inlet, the criteria are the concentrations of oxygen and oil vapor in the replacement dead region.