Application and Analysis of Comprehensive Treatment Technology of Exhaust Gas During Loading at an Oil Product Terminal of an Enterprise Along the Yangtze River
By analyzing the nature of exhaust gas emitted during loading at oil terminal,comparing various VOCs exhaust gas treatment technologies,and aiming at the characteristics of large fluctuation of exhaust gas volume and concentration on board an oil terminal of an enterprise along the Yangtze River,the process of"low temperature diesel oil absorption-total hydrocarbon concentration homogenization-catalytic oxidation"was finally determined to treat the exhaust gas of jet fuel,naphtha and other materials on board.The process of"total hydrocarbon concentration homogenization-catalytic oxidation"was adopted to treat the exhaust gas of paraxylene and other materials on board ships.The main operating conditions of the unit are as follows:the operating temperature in the diesel absorber is 5～15℃,the operating pressure is 0.2 MPa(G),the inlet temperature of the catalytic oxidation reactor is 300～400℃,and the reaction volume space speed is 5 000～20 000 h-1.The emission mass concentration of pollutants in the purified gas meets the requirements of environmental protection emission standards at all levels,in which the emission mass concentration of non-methane hydrocarbon is less than 20 mg·m-3,and the emission mass concentration of benzene,toluene and xylene is less than the detection limit.The amount of oil and gas recovered by the waste gas treatment device is 480 t·a-1,which has excellent environmental benefits and considerable economic benefits.
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