Nitrogen protection pipeline system for floating roof tank

By designing a nitrogen-filling protection pipeline system that includes a distributor, nitrogen injection branch pipe, nitrogen injection ring pipe, sealed nitrogen injection pipe, nitrogen injection riser, and escalator nitrogen injection main pipe, the problems of easy deformation, leakage, and collision of pipelines in the existing technology are solved, and the effects of reducing oil and gas concentration, reducing nitrogen leakage, and improving system reliability are achieved.

CN116216108BActive Publication Date: 2026-03-31CHINA PETROLEUM ENG & CONSTR +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-22
Publication Date
2026-03-31

AI Technical Summary

Technical Problem

The existing nitrogen protection pipeline system for floating roof tanks has problems such as easy deformation, leakage, and collision with floating roof accessories during layout and renovation. In particular, the pipeline layout is limited in the renovation of existing tanks, and the adjustability and reliability of the existing system are insufficient.

Method used

A nitrogen-filling protection piping system was designed, comprising a distributor, nitrogen injection branch pipe, nitrogen injection ring pipe, sealed nitrogen injection pipe, nitrogen injection riser, and escalator nitrogen injection main pipe. The system employs welded connections, flexible hoses, and swivel joints to accommodate the movement of the floating roof, reduces the number of sealed joints, and uses self-locking bolts to connect the sealed nitrogen injection pipe to the secondary sealing plate, ensuring the reliability and flexibility of the system.

Benefits of technology

It effectively reduces the oil and gas concentration in the primary and secondary sealed annular spaces, reduces the risk of explosion and combustion, reduces nitrogen leakage, improves the reliability and stability of the system, and is reusable.

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Abstract

The application discloses a floating roof storage tank nitrogen filling protection pipeline system, which comprises a floating roof storage tank and a floating roof, and further comprises a nitrogen filling protection pipeline, which comprises a distributor, nitrogen injection branch pipes, a nitrogen injection ring pipe, sealed nitrogen injection pipes, a nitrogen injection vertical pipe and a staircase nitrogen injection main pipe; the distributor is arranged at the center of the floating roof, and the nitrogen injection ring pipe is arranged on the outer side of the floating roof; a plurality of nitrogen injection branch pipes are radially arranged on the floating roof with the distributor as the center, one end of one of the nitrogen injection branch pipes is communicated with an air inlet interface of the distributor, and the other end is communicated with the staircase nitrogen injection main pipe through a flexible hose; the remaining nitrogen injection branch pipes are communicated with an air outlet interface of the distributor and the nitrogen injection ring pipe; a plurality of sealed nitrogen injection pipes are distributed on the nitrogen injection ring pipe, one end of each of the sealed nitrogen injection pipes is inserted into an annular cavity surrounded by primary and secondary sealing plates and is communicated with the annular cavity, and the other end is communicated with the nitrogen injection ring pipe; the staircase nitrogen injection main pipe is communicated with the nitrogen injection vertical pipe through a rotary joint. The application can effectively reduce the oil and gas concentration of the primary and secondary sealing annular cavities and reduce the risk of explosion and combustion of the floating roof storage tank.
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Citation Information

Patent Citations

  • Storage tank fire extinguishing systems

    CN206621688U

  • Outer floating roof tank nitrogen filled protection system

    CN206954954U