Pipeline cleaning system of pipelines of nitrogen sealed covered floating roof tank

Abstract

The invention discloses a pipeline cleaning system of pipelines of a nitrogen sealed covered floating roof tank. The pipeline cleaning system comprises the nitrogen sealed covered floating roof tank,a blowing pipeline, an oil product pipeline, a pipeline cleaning pipeline, a metal hose, a gas-liquid separation tank, a pipeline cleaning tank entering pipeline, a gas-phase tank return pipeline, anemergency release valve, a mechanical breather valve, a single breather valve, a nitrogen sealed valve, an oil-gas pipeline and a nitrogen pipeline. According to the pipeline cleaning system of pipelines of the nitrogen sealed covered floating roof tank, pipeline cleaning gas media included in oil products in the blowing pipeline can be effectively separated, the pipeline cleaning gas media are prevented from entering the space, between a tank bottom plate and a floating disc, in the nitrogen sealed covered floating roof tank, and therefore safe operation of pipeline cleaning of the pipelinesof the nitrogen sealed covered floating roof tank is achieved, and the effect of saving nitrogen is achieved. The process method and structural form of the pipeline system are simple, feasibility is good, and investments are low. The method is suitable for the newly-built pipeline cleaning system of the pipelines of the nitrogen sealed covered floating roof tank and is suitable for upgrading and modifying of the existing pipeline cleaning system of the pipelines of the nitrogen sealed covered floating roof tank so as to effectively separate pipeline cleaning gas include in the blowing oil products of the pipelines of the nitrogen sealed covered floating roof tank, and the pipeline system that the nitrogen sealed covered floating roof tank can utilize nitrogen and other gas to carry out direct pipeline cleaning is achieved.

Description

technical field [0001] The invention belongs to the technical field of storage and transportation of petrochemical enterprises, and in particular relates to a safety pipeline system for sweeping lines of nitrogen-blanketed inner floating roof tanks. Background technique [0002] Line sweeping is an important process in the production operation of oil storage and transportation systems in petrochemical enterprises. The sweeping line mainly plays the role of pipeline medium replacement and cleaning. Commonly used line sweeping media are: gas and water. Due to the structural characteristics of the floating plate of the nitrogen blanketed inner floating roof tank, air flow is not allowed between the floating plate and the liquid surface, otherwise due to the impact of the air flow, the floating plate of the nitrogen blanketed inner floating roof will be damaged and the floating plate will be deformed. Chuck or sinking accidents are caused, so it is forbidden to sweep the line d...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a nitrogen-blanketed inner floating roof tank pipeline sweeping system to solve the problem of using nitrogen pipelines to sweep lines and directly enter the nitrogen-blanketed inner floating-roof tank in the prior art, which often causes the nitrogen-blanketed inner floating roof floating plate The technical problem of the chuck or sinking accident

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