Ventilation and explosion suppression device for seal ring of floating roof tank

Abstract

The invention relates to a ventilation and explosion suppression device for a seal ring of a floating roof tank. The ventilation and explosion suppression device comprises an air supply branch pipe which is communicated with the floating roof tank and externally connected with a gas transmission mother pipe, the annular seal ring is arranged between the tank wall of an oil tank and the side wall of a floating roof, the annular seal ring comprises a primary sealing piece and a secondary sealing piece, and the ventilation and explosion suppression device is characterized in that the ventilation and explosion suppression device further comprises a central distributor, a plurality of radial branch gas pipes and a plurality of arc-shaped gas distribution pipes, wherein the central distributor is arranged in the center position above a top plate of the floating roof and communicated with the air supply branch pipe; the plurality of the radial branch gas pipes are arranged between the central distributor and the seal ring and communicated with the central distributor; the plurality of the arc-shaped gas distribution pipes are arranged in the seal ring or an edge floating cabin and communicated with the radial branch gas pipes, and a plurality of exhaust holes or gas jet heads for conveying gas into the seal ring are arranged on the arc-shaped gas distribution pipes; and a gap for exhausting tail gas is arranged between the tank wall and the top end of the seal ring. The whole set of the system has the advantages of simple structure, low cost, and convenience in use and maintenance, thereby being a simple, economic, reasonable, effective and ideal technological way for realizing intrinsic safety of the oil tank.

Description

technical field [0001] The invention relates to an explosion-proof device for a crude oil storage tank, in particular to a ventilation explosion-suppression device for a sealing ring of a floating-roof oil tank. Background technique [0002] With the rapid development of large-scale and clustered crude oil storage tanks, the problem of explosion-proof safety of oil tanks has become increasingly prominent. Especially for floating roof oil tanks, due to the influence of its sealing structure, a mixture of combustible gas and air inevitably accumulates in the annular seal ring formed between the primary and secondary seals, the tank wall, and the side wall of the floating roof (see figure 1 , Explosion area), in the event of lightning strikes, static sparks, etc., fires and explosions are extremely prone to occur, and it is a high-incidence area for oil tank fire accidents, which account for 72.8% of the total oil tank accidents. [0003] Ignition source, sealed space and comb...

AI Technical Summary

Problems solved by technology

It achieves the purpose of protection by filling the oil tank with inert gas through the breathing pipe network. However, it is carried out on the entire oil tank, not specifically on the oil tank sealing ring. The protection area is large, the structure is complicated and the cost is high. higher

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