Research On Optimization Of Oil Shale Retorting Process

Global oil shale reserves are very great, oil shale retort can produce shale oil. Theproperties of shale oil are similar to petroleum. Using oil shale produce shale oil canrelieve the tense situation of petroleum. The shale oil production of china occupies thefirst place of global at present. However, there are certain deficiencies in the retortingprocess. Internal yield reach60~65%, foreign can reach90%. Therefore, optimizationtraditional retorting process to increase oil yield is necessary.Optimal conditions have been obtained by shale oil retorting, which particle sizerange is10~60mm, distillation temperature is550℃, the humidification air instead ofoil shale dry distillation gas, the cold circulation instead of thermal cycling on the bottomof the dry distillation stove, the heating method of heat carrier was replaced bysustainable heating of tubular-furnace from intermitting heating of regenerative heatingfurnace, semi-coke was cooled by exchanger instead of basin. The primary cooler, mist,oil absorber, electric tar and desulfurization tower are used in order to recovering drydistillation gas. The phenomenon of melting furnace can be avoided at a constanttemperature during retorting. The retorting gas is used as a heat carrier which can reducethe destruction of shale oil component by the oxygen gas components of humidificationair. The phenomenon of melting furnace can be avoided by oxygen intense burning. Theheating temperature is stable by using tubular-furnace, which can not cause thephenomenon of shale oil secondary cracking. The oil shale Semi-coke heat is reclaimedand the water consumption is saved by using heat exchanger of oil shale semi-coke andretorting gas. Recovery rate of shale oil is improved by using advanced recoverypurification facilities, The production is more environmental by the desulfurization ofretorting gas.The advantage of optimization is that the constant temperature heat carrier canincrease the production capacity and the retorting efficiency, the production capacityincrease1.2times, oil shale yield above90%, shale oil recovery above98%.