Fire detection and automatic fire extinguisher system and application thereof in floating roof tank sealing ring

Abstract

The invention discloses a fire detection and automatic fire extinguisher system applied to a floating roof tank and application thereof in a floating roof tank sealing ring. The fire detection and automatic fire extinguisher system comprises fusible plug spouts, a branch pipe, a main pipe, a pressure switch, a gas-liquid mixer, a pressure gage, a foam mixed liquor storage tank, an alarm system, ahigh-pressure gas cylinder and a pressure-reducing valve. The system is provided with a plurality of fusible plug spouts which are connected with the main pipe through the branch pipe respectively. The fire detection and automatic fire extinguisher system applied to the floating roof tank can accurately detect the fire in the floating roof tank in a few seconds, simultaneously can transmit a firealarm signal to a control chamber which is connected with the fire detection and automatic fire extinguishing system, and is immediately and automatically started to extinguish the fire. The fire response time is short, the fire extinguishing speed is high, the consumption of fire extinguishing agents is low, and the initial fire can be extinguished to avoid sealing ring fire spread.

Description

technical field [0001] The invention relates to the technical field of detection and automatic operation, in particular to a fire detection and automatic fire extinguishing system applied to a floating roof storage tank and its application to the sealing ring of the floating roof storage tank. Background technique [0002] In the chemical process, some liquid-based storage tanks are prone to fire. According to the statistical data of fire accidents of floating roof storage tanks at home and abroad for many years, the main fire form of floating roof storage tanks is the sealing ring fire. [0003] At present, most of the fire extinguishing systems of floating roof storage tanks at home and abroad are designed based on extinguishing seal ring fires, and the most widely used fire extinguishing system is the fixed foam fire extinguishing system. The fixed foam fire extinguishing system is mainly composed of fire water pump, fire water source, foam proportional mixer, foam liqui...

AI Technical Summary

Problems solved by technology

Due to the complex composition of the fixed foam fire extinguishing system, the system starts slowly, especially the fire extinguishing system using a pressure foam proportional mixer, the system start-up procedure is more complicated, which requires higher requirements for operators

It generally takes 2-3 minutes from the start of the fire extinguishing system to the spraying of foam from the nozzle, and after the foam is sprayed from the nozzle, it will take at least 6 minutes for the foam to enter the sealing ring to extinguish the fire, which greatly delays the best fire extinguishing time , causing the fire to expand, it can be seen that the fire extinguishing efficiency of the fixed foam fire extinguishing system is low

[0005] In addition, the foam consumption of the fixed foam fire extinguishing system is large, and the large amount of foam sprayed is easy to contaminate the oil products. Excessive foam accumulation on the floating plate may also cause the floating plate to tilt or sink; the maintenance workload of the system is large, such as foam pipeline transportation It needs to be cleaned in time after foaming, otherwise it will easily lead to serious corrosion of the pipeline; the fire riser on the tank wall needs to be opened regularly to empty the rust residue, otherwise it will easily lead to pipeline blockage; the water source of the system is composed of a pool and a water pump, and the system takes up a lot of space and needs to be installed in separate rooms , the operation is inconvenient, the structure of the foam mixing device of the system is complicated and the cost is high

Images