Safety protection system and safety protection method for floating-roof oil tank based on active nitrogen filling

Abstract

Disclosed is a fire safety protection system for a floating-roof oil tank based on active nitrogen filling. At least one gas partition plate is arranged between a primary sealing section and a secondary sealing section of the floating-roof oil tank, a gas inlet pipe and a gas outlet pipe are arranged in a matched manner, the gas inlet pipe is fixedly mounted at the sealing edge of the oil tank and connected with a gas nozzle which is a double-layer disc gas nozzle, a gas pump is connected with the gas outlet pipe, and an optical fiber pressure sensor, an optical fiber temperature sensor, a sensing signal processing unit, the gas pump, a gas detection module, a gas valve controller and a nitrogen fire protection controller are arranged outside the floating-roof oil tank. When fire-breeding is discovered or other areas on site have a fire, nitrogen is rapidly released, a protection layer is formed above the oil tank to realize fire protection, and a closed-loop control is formed by the aid of the gas partition plates and by means of pressure and temperature detection and active combustible gas suction detection. When abnormal temperature, pressure and oil and gas leakage are discovered, protection gas is filled, fire risks are reduced, and the safety performance of the oil tank is improved.

Description

Technical field [0001] The invention belongs to the technical field of fire hazard protection methods for floating roof oil tanks and fire hazard signs detection, and particularly relates to a safety protection system and method for floating roof oil tanks based on active nitrogen filling. Background technique [0002] Fire is a catastrophic burning phenomenon, especially in petrochemical sites that cause greater harm. In the process of oil and gas extraction, storage, transportation, and use, leakage is common. Once the oil and gas are burned, the fire is difficult to control, which may cause larger-scale fires and explosions. Early detection and corresponding measures are taken to eliminate the fire in the embryonic stage It is an effective measure for fire prevention in this type of place. Floating roof oil tanks are currently the main storage containers used. At present, natural ventilation and sealed structure protection are widely used in such places: some manufacturers us...

AI Technical Summary

Problems solved by technology

Detectors are mainly point-type combustible gas detectors, point-type flame detectors, etc. The advantages of these detectors are: they can respond quickly to the changes in the concentration of combustible gases and open flames in the protection area, and they are helpful for early detection of fire hazards and in the future. Early fire detection and alarm play a vital role in the safety of people and property in the protected area; its disadvantages are: false alarms from detectors occur from time to time; the environment in the protected area is complex, flammable and explosive , high temperature, strong electromagnetic interference and dusty, many detectors fail within a short period of time after they are put into operation, making it impossible to reliably detect early fires in protected areas, bringing hidden dangers to fire safety management

The danger level of the protection site basically uses flameproof or intrinsically safe detectors, which have a high cost; at the same time, because the fire in the protection site develops rapidly, when the fire occurs and is detected, it will be restarted after the controller confirms Fire extinguishing measures, the fire may have expanded rapidly, and even if the fire is extinguished in time, it has caused relatively large losses

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