Tank truck purging system

摘要: Apparatus and method are disclosed for purging a vehicle tank compartment to permit access repair, or maintenance without environmental pollution hazard workmen entering the tank. In accordance with invention an elongated cylindrical storage is tilted about its horizontal axis, form reservoir purge water. The connectable as by flexible hoses fill drain connections of truck, rail car, other bulk liquid vehicle. Purge water pumped from at level above lower end vapor displaced recovered through recovery system. Desirably, filled until it overflows into line. Water returned position near upwardly end. arrangement permits gravity separation accumulation minor amounts light hydrocarbons, such diesel fuel gasoline upper zone formed A similar volume rust particles, sludge like Hydrocarbons lighter than flushed adding so that line connected separator Heavy particles removed cleanout may also be increase surface area hydrocarbons.