Fireproof anti-explosion system of floating-roof oil tank

Abstract

The invention discloses a fireproof anti-explosion system used for conducting inerting on an oil gas space between a primary sealing piece and a secondary sealing piece at the top of a floating-roof oil tank by nitrogen. A nitrogen introducing pipe and a mixed gas discharging pipe are arranged on the a floating-roof buoyancy module, the inner ends of the nitrogen introducing pipe and the mixed gas discharging pipe extend into the oil gas space, the outer end of the nitrogen introducing pipe is connected with a nitrogen-rich gas storage tank by a first check valve and a first flow regulating valve, and the nitrogen-rich gas storage tank is also connected with a nitrogen-rich gas generating device; the outer end of the mixed gas discharging pipe is connected with an active carbon absorbing device by a second check valve and a second flow control valve, the active carbon absorbing device is connected with a recovery tank, an oil gas concentration measuring instrument is arranged in the oil gas space and is connected with an oil gas concentration monitoring system, if the condition that the oil gas concentration in the oil gas space reaches the probable value of explosion, the nitrogen is introduced, the oil gas concentration in the oil gas space is lowered, oil gas mixed with nitrogen is subjected to displacement by the nitrogen and is discharged from the mixed gas discharging pipe, and the effect of preventing an oil tank from firing and exploding can be achieved.

Description

technical field [0001] The invention relates to a fire-proof and explosion-proof system for a floating-roof oil tank, in particular to a fire-proof and explosion-proof system for inerting the oil-gas space between the primary and secondary seals on the top of the floating-roof oil tank with nitrogen. Background technique [0002] The most serious safety problems of floating roof oil tanks are combustion and explosion accidents. The fire and explosion accidents of oil tanks not only bring the loss of oil products and oil depot facilities, but also easily cause casualties and even lead to environmental pollution problems. The fire and explosion of the oil tank must have a certain ignition source and an oil-gas mixture that reaches the limit of the explosion concentration. The basic measures for fire prevention and explosion protection are to prevent the two conditions from coexisting. The measures to prevent the explosive oil-gas mixture are called primary protective measures....

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Problems solved by technology

Although these measures have given the development direction that can be tried, they are only limited to theory, and no specific implementation plan has been given, nor have they been applied in practice.

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